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Why Glucose Restrictions Are Essential in Treating Cancer – The Epoch Times

The procedure recommended by most doctors might not always be a good option, as it could turn a potentially benign situation into a malignant one.

Thomas Seyfried, Ph.D., professor in the biology department at Boston College, is a leading expert and researcher in the field of cancer metabolism and nutritional ketosis. His book, Cancer as a Metabolic Disease: On the Origin, Management and Prevention of Cancer is a foundational textbook on this topic, and in August 2016, he received the Mercola.com Game Changer Award for his work.

Here, we discuss the mechanisms of cancer and the influence of mitochondrial function, which plays a crucial role in the development and treatment of this disease. Hislandmark cancer theory is available as a free PDF.

Many of his views are now encapsulated in his most paper,1Mitochondrial Substrate-Level Phosphorylation as Energy Source for Glioblastoma: Review and Hypothesis, published online December 27, 2018. Hes also published a number of other papers2,3,4on the metabolic underpinnings of cancer.

The paper is a review and hypothesis paper identifying the missing link in Otto Warburgs central theory,Seyfried explains. [Warburg] defined the origin of cancer very accurately back in the 1920s, 30s, 40s and 50s in his work in Germany. Basically, he argued and provided data showing that all cancer cells, regardless of tissue origin, were fermenters. They fermented lactic acid from glucose as a substrate.

Even in the presence of oxygen, these cells were fermenting. This is clearly a defect in oxidative phosphorylation. The problem is that for decades, people said Warburg was wrong mainly because we see a lot of cancer cells take up oxygen and make adenosine triphosphate (ATP) from within the mitochondria People began to question, If cancer cells have normal respiration, why would they want to use glucose as a fermentable fuel?

The whole concept became distorted The cancer cells simply choose to ferment rather than respire. Now, of course, if you look under the electron microscope at majority of cancers, youll see that the mitochondria are defective in a number of different ways. Their structures are abnormal. The numbers are abnormal. There are many abnormalities of mitochondria seen directly under electron microscopy. Clearly, Warburg was not wrong.

Before we delve into the meat of how cancer actually occurs it would be good to review a diagnostic strategy that nearly all of us are offered when confronted with a cancer diagnosis. It is vital to understand that this may not be your best strategy and that for many it would be wise to avoid the biopsy.

Seyfried warns against doing biopsies, as this procedure may actually cause the cancer to spread. A tumor is basically a group of proliferating cells in a particular part of your body. For purposes of diagnosis, a small biopsy sample will often be taken to ascertain whether the tumor is benign or malignant.

The problem is that when you stab into the cancer microenvironment to remove a part of the tissue, it creates a wound in that microenvironment that in turn elicits the invasion by macrophages and other immune cells.

If you already have an acidic microenvironment, you run the risk of causing a fusion hybridization event in that microenvironment between your macrophages and cancer stem cells (as discussed below). This could turn a potentially benign situation into a malignant one, and if the tumor is malignant, stabbing into it could make a bad situation worse.

The question is, what is the value of doing a biopsy in the first place? We take biopsies of breast tissue to get a genomic readout of the different kinds of mutations that might be in the cells. Now, if cancer is not a genetic disease and the mutations are largely irrelevant, then it makes no sense to do that in the first place. If the tumor is benign, why would you want to stab it? If the tumor is malignant, why would you ever want to stab it?

I came to this view by reading so many articles in the literature based on brain cancer, breast cancer, colon cancer, liver cancer showing how needle biopsies have led to the dissemination of these tumor cells, putting these people at risk for metastatic cancer and death,Seyfried says.

In metabolic therapy you would not touch the tumor; you would not disturb the microenvironment. By leaving it alone, you allow the tumor to shrink and go away.

When you start to look at this as a biological problem, many of the things that we do in cancer make no sense. We have, in brain cancer, people say, You have a very low-grade tumor. Lets go in and get it out. What happens is you go in and get it out, and then the following year it turns into a glioblastoma.

How did that happen? Well, you disturbed the microenvironment. You allowed these cells that are marginally aggressive to become highly aggressive. Then you lead to the demise of the patient,Seyfried says.

That happens significantly because its called secondary glioblastoma arising from therapeutic attempt to manage a low-grade tumor. The same thing can happen with all these different organs. You stab breast tumors, you stab colon tumors, you run the risk of spreading the cells

My argument is the following: If the patient has a lump, whether its in the breast, in the colon, lung or wherever or a lesion of some sort, that should be the cue to do metabolic therapy.

Do metabolic therapy first. In all likelihood, it will shrink down and become less aggressive. Then the option becomes, Should we debulk completely rather than doing some sort of a biopsy? We want to reduce the risk, because if we can catch the whole tumor completely, then we dont run the risk of spreading it

In our procedure, you bring the body back into a very high state of metabolic balance, and then you strategically go and degrade the tumors slowly without harming the rest of the body.

Radiation, chemo and the strategies that were using today dont do this. Theyre based on the gene theory of cancer that genetic mutations are causing the cell cycle to grow out of control. Well, this is not the case. Again, a lot of these toxic procedures need to be rethought, reanalyzed in my mind.

In biology, structure determines function. This is an evolutionarily conserved concept. So, how can mitochondria be structurally abnormal in tissue, yet have normal respiration? As Seyfried notes, this doesnt make sense. Confusion has arisen in part because many study cancer in culture, and make profound statements and comments regarding what happens in culture, Seyfried says.

If you look at cancer cells in culture, many of them do take in oxygen and make ATP, but at the same time, theyre fermenting. This was the conundrum. They called it the Warburg Effect. Theyre fermenting, but many people at the same time thought their respiration was normal.

This was the main problem with Warburgs theory. But Warburg clearly said in his papers [that] its not the fact that they take in oxygen; its how much ATP they can generate from oxidative phosphorylation, which is the normal respiratory capacity of the mitochondria.

As explained by Seyfried, if you measure ATP and look at oxygen consumption in tumor cells, it appears theyre making ATP and taking in oxygen, therefore, their respiration is assumed to be normal. However, when you look at the tissues in cancer patients, the mitochondria are abnormal.

What I and Dr. Christos Chinopoulos from Semmelweis University in Budapest, Hungary, who is the world-leading expert on mitochondrial physiology and biochemistry realized [was] that the mitochondria of tumor cells are actually fermenting amino acids, glutamine in particular. Theyre not respiring. Theyre fermenting an alternative fuel, which is glutamine,Seyfried says.

With this understanding, Warburgs theory can be proven correct cancer arises from damage to the mitochondrias ability to produce energy through respiration in their electron transport chain.

The compensatory fermentation involves not only lactic acid fermentation, but also succinic acid fermentation using glutamine as a fermentable fuel. Its been known for decades that glutamine is a main fuel for many different kinds of cancers, but most people thought it was being respired, not fermented.

Seyfried and Chinopoulos discovery confirms that cancer cells in fact have damaged respiration, and to survive, the cancer cells must use fermentation. The two most available fermentable fuels in the cancer microenvironment are glucose and glutamine. Hence, targeting glucose and glutamine is a crucial component of cancer treatment.

Without glucose and glutamine, the cancer cells will starve, as they cannot use ketones. The simplest approach to cancer then is to bring patients into therapeutic ketosis, and then strategically target the availability of glucose and glutamine.

Basically, what were saying [is] that mitochondrial substrate-level phosphorylation is a non-oxidative metabolism mechanism inside the mitochondria that would generate significant amounts of energy without oxidative phosphorylation,Seyfried says.

According to Seyfried, mitochondrial dysfunction is at the heart of nearly every type of cancer. Unfortunately, few oncologists have this understanding and many still believe cancer is the result of genetic defects. However, nuclear transfer experiments clearly show cancer cannot be a genetic disease.

Theres been no rational scientific argument that I have seen, to discredit the multitude of evidence showing that the [genetic] mutations are not the drivers but the effects [of mitochondrial dysfunction],Seyfried says.

As a matter of fact, theres new information now where people are finding so-called genetic drivers of cancer expressed and present in normal cells, normal skin and also esophagus This is another [issue] how you get these so-called driver mutations in normal tissues. Were also finding some cancers that have no mutations, yet, theyre fermenting and growing out of control.

There are a number of new observations coming out that challenge the concept that cancer is a genetic disease. And once you realize that its not a genetic disease, then you have to seriously question the majority of therapies being used to manage the disease. This [helps] explain [why] we have 1,600 people a day dying from cancer in the United States.

Why do we have such an epidemic of suffering and death when we have been studying this disease for decades? Well, if you look at the massive amounts of scientific papers being written on cancer, youll often find that theyre structured around gene defects.

What Im saying is that if cancer is not a genetic disease and the mutations are downstream epiphenomena, why would the field continue to focus on things that are mostly irrelevant to the nature of the disease? What Im saying is very devastating, because Im telling the majority of the people in the field that theyre basically wasting their time

I think we can drop the death rate of this disease by about 50% in 10 years if cancer is treated as a mitochondrial metabolic disease, targeting fermentable fuels rather than using toxic therapies that are focused on downstream effects.

Radiation is designed to stop DNA replication. DNA replication requires energy. If you pull the plug on their fermentable fuels, theyre not going to be able to replicate anyway All of the things that were doing to treat cancer is basically approaching the disease from a misunderstanding of the biology

We know viruses can cause cancer. We know radiation causes cancer. We know carcinogens cause cancer. We know intermittent hypoxia causes cancer. We know systemic inflammation causes cancer. We know just getting older puts you at risk for more cancer.

We know there are inherited mutations in the genome that can cause cancer. But how are all these things linked through a common pathophysiological mechanism? The common pathophysiological mechanism is damaged through the structure and function of the mitochondria.

Every one of the issues including inherited mutations, damage the respiration of a particular population of cells in a tissue. You look at the breast cancer gene (BRCA 1), for example. People will say, Cancer must be a genetic disease because you inherit a mutation that causes the disease.

You only get the disease if that mutation disrupts the function of the mitochondria. Fifty percent of women who carry the mutation never get cancer or breast cancer because the mutation, for some reason, did not damage the mitochondria in that person.

So, to summarize, the true origin of cancer is damage to the respiratory function of the mitochondria, triggering compensatory fermentation, which is run by oncogenes. Oncogenes play a role by facilitating the entry of glucose and glutamine into the cell to replace oxidative phosphorylation.

Seyfried also has a very different view on the biology of metastasis (the spread of cancer). He explains:

Weve looked at cancer stem cells in a number of our preclinical models These guys grow like crazy in place. The tumor just keeps expanding, but it doesnt spread. It doesnt spread into the bloodstream or metastasize to various organs.

We discovered a very unusual cancer 20 years ago. It took us 10 to 15 years to figure out what it was. You can put a few of these cells anywhere in the mouses body and within three to four weeks, this mouse is full of metastatic cancer. It made the cover of the International Journal of Cancer, when we published this back in 2008, but we had worked on the problem for years.

We couldnt figure out what it was that made these cells so incredibly metastatic. We found out that once we identified the biology of the cell, it turned out [it has] many characteristics in common with the macrophage, which is one of the most powerful immune cells in our body.

We said, Wow. Is this unique only to this kind of cell or do metastatic cancers in humans also express characteristics of macrophages? We looked and we found that almost every major cancer that metastasizes has characteristics of macrophages. Then we said, Well, how could this possibly happen? Is it coming from the macrophage?

A number of scientists have all clearly shown that there is some fusion hybridization character going on. In other words, macrophages, our wound-healing cells, they come into a microenvironment where you might find many proliferating neoplastic stem cells, but they dont have the capacity to metastasize.

Its only when the macrophages fuse with these stem cells that you have a dysregulated energy metabolism coming in this hybrid cell. This hybrid cell now has characteristics of both stem cells and macrophages.

The stem cell is not genetically equipped to enter and exit tissue. The macrophage, as a normal cell of your body, is genetically equipped to enter and exit tissue and live in the bloodstream. Theyre very strongly immunosuppressive. These are all characteristics of metastatic cancer.

According to Seyfried, metastatic cancer cells are essentially a hybrid, a mix of an immune system cell and a dysregulated stem cell, the latter of which could originate from a disorganized epithelial cell or something similar. In short, its a hybrid cell with macrophage characteristics.

Macrophages are essential for wound healing and part of our primary defense system against bacterial infections. They live both in the bloodstream and in tissues, and can go anywhere in the body. When an injury or infection occurs, they immediately move in to protect the tissue.

The metastatic cancer cell has many of those same properties,Seyfried explains,But the energy and the function of the cell is completely dysregulated, so it proliferates like crazy but has the capacity to move and spread through the body, so its a corrupted macrophage. We call it a rogue macrophage.

Like macrophages, metastatic cancer cells can also survive in hypoxic environments, which is why most angiogenic therapies are ineffective against metastatic cancer.

So, what do these metastatic hybrid cells need to survive? Both macrophages and immune cells are major glutamine consumers, and according to Seyfried, you can effectively kill metastatic cells by targeting glutamine.

However, it must be done in such a way so as to not harm the normal macrophages and the normal immune cells. In other words, it must be strategic. For this reason, Seyfried developed a press-pulse therapy for cancer, which allows the patient to maintain normal immune system function, while at the same time targeting the corrupted immune cells the macrophage fusion hybrid metastatic cells as well as inflammation.

The therapies we are using to attempt to kill these [metastatic] cells put us at risk for having the cells survive and kill us. You can control these cells for a short period of time, but they can hunker down and enter into some sort of a slightly dormant state, but they reappear.

People say, Oh, these tumor cells are so nifty and smart they can come back at you. The problem is youve never really challenged them on their very existence, which is they depend on fermentation to survive. If you dont target their fermentation, theyre going to continue to survive and come back at you.

Many of the therapies that we use radiation, chemo and some of these other procedures are not really going after the heart of the problem. That oftentimes puts you at risk for the recurrence of the disease. Your body is already seriously weakened by the toxic treatments. And in the battle, you lose. If you are fortunate enough to survive your body is still beat up.

You have now put your [body] at risk for other kinds of maladies Why are we using such toxic therapies to kill a cell when we know what its weaknesses are? These are the paradigm changes that will have to occur as we move into the new era of managing cancer in a logical way.

To properly address cancer, then, you need to clean up the microenvironment, because the microenvironment will strategically kill cells that are dependent on fermentation while enhancing cells that arent. At the same time, the microenvironment will also reduce inflammation.

You also have to be very careful not to kill your normal and healthy immune cells, because they need glutamine too,Seyfried says. What we find is that when we strategically attack the tumor this way, it turns out that our immune cells are paralyzed.

The cancer cells are killed, but the normal immune cells are paralyzed. Theyre not dying, theyre just not doing their job. What we do is we back off the therapy a little; allow the normal immune cells to regain their biological capacity, pick up dead corpses, heal the microenvironment, and then we go after the cancer cells again.

Its a graded response, knowing the biology of the normal cells and the abnormal biology of the tumor cells. This is a beautiful strategy. Once people know how you can play one group of cells off another, and how you can strategically kill one group of cells without harming the other cells, it really becomes a precision mechanism for eliminating tumor cells without harming the rest of the body.

You dont need to be poisoned and irradiated. You just have to know how to use these procedures to strategically kill the cells. Protecting normal macrophages is part of the strategic process. Killing the corrupted ones is part of the strategic process. Again, you have to put all of these together in a very logical path. Otherwise, youre not going to get the level of success that we should be getting.

This strategy is what Seyfried calls press-pulse treatment, and essentially involves restricting the fermentable fuels glucose and glutamine in a cyclical fashion to avoid causing damage to normal cells and tissues. Glucose is effectively restricted through a ketogenic diet. Restricting glutamine is slightly trickier.

The press-pulse strategy was developed from the concept of press-pulse in the field of the paleobiology. A press was some chronic stress on populations, killing off large numbers, but not everything, because some organisms can adapt to stress. The pulse refers to some catastrophic event.

The simultaneous occurrence of these two unlikely events led to the mass extinction of almost all organisms that existed on the planet. This was a cyclic event over many hundreds of millions of years. The geological records show evidence for this press-pulse extinction phenomenon.

What we simply did was take that concept and say, Lets chronically stress the tumor cells. They need glucose. You can probably kill a significant number of tumor cells by just stressing their glucose. Thats the press. The press is different ways to lower blood sugar. You put that chronic stress on top of the population either by restricted ketogenic diets [or] therapeutic fasting. There are a lot of ways that you can do this.

Also, emotional stress reduction. People are freaked out because they have cancer, therefore their corticoid steroids are elevated, which elevates blood sugar. Using various forms of stress management, moderate exercise all of these will lower blood sugar and contribute to a chronic press and stress on the cancer cells.

However, youre not going to kill all cancer cells if you just take away glucose. Because the other fuel thats keeping the beast alive is the glutamine. We have to pulse, because we cant use a press for glutamine targeting, because then youre going to kill your normal immune cells or impair them, and they are needed for the eventual resolution of the disease.

What were going to do is were going to pulse various drugs. We dont have a diet system that will target glutamine. Glutamine is everywhere. Its the most abundant amino acid in your body But you have to use [the drugs] very strategically; otherwise they can harm our normal immune system and then be counterproductive

I think that once we understand how we can target effectively glutamine without harming our normal immune cells this is the strategy that will make most of these other therapies obsolete Its cost-effective and non-toxic and it will work very well.

But were still at the very beginning of this. We need to continue to develop the doses, timing and scheduling of those drugs that are most effective in targeting glutamine that can be done without harming the rest of the cells in our body.

If you would like to support Dr. Seyfrieds research, please consider making a donation to the Foundation For Metabolic Cancer Therapies. The donation tag is on the top row of the of the foundationsite. This Foundation is dedicated to supporting Dr. Seyfrieds studies using metabolic therapy for cancer management with 100% of the donated funds going directly to research on metabolic therapy for cancer.

Originally published July 31, 2022 on Mercola.com

Views expressed in this article are the opinions of the author and do not necessarily reflect the views of The Epoch Times. Epoch Health welcomes professional discussion and friendly debate. To submit an opinion piece, please follow these guidelines and submit through our form here.

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Why Glucose Restrictions Are Essential in Treating Cancer - The Epoch Times

Prominent Stanford University scientist and cellular reprogramming innovator will oversee all research for Turn Bio – Yahoo Finance

Vittorio Sebastiano, globally recognized for pioneering science, expands his role at company he co-founded as it moves closer to clinical research

MOUNTAIN VIEW, Calif., Aug. 8, 2022 /PRNewswire/ -- Turn Biotechnologies, a cell rejuvenation company developing novel mRNA medicines to cure untreatable, age-related conditions, today announced that co-founder Vittorio Sebastiano, PhD, will become its head of research.

Stanford University Professor Vittorio Sebastiano, PhD, a leader in the emerging field of cellular reprogramming, will oversee research at Turn Biotechnologies, the company he co-founded in 2018.

Sebastiano led development of the unique mRNA-based ERA (Epigenetic Reprogramming of Aging) platform Turn Bio uses to produce tailored protein cocktails to rejuvenate targeted cells. He assumes his role as head of research this month. Sebastiano has served as chairman of Turn Bio's Scientific Advisory Board since he co-founded the company in 2018.

A Stanford School of Medicine faculty member, author of more than 50 scientific articles and frequent speaker at research conferences around the world, Sebastiano is prominent in the emerging field of cellular reprogramming. His Stanford University lab pioneered the development of a new paradigm for treating aging and age-related diseases. He also led the team that first confirmed human cells can be reprogrammed using Turn Bio's ERA platform.

"Vittorio's vision and leadership will propel Turn Bio's innovation and speed our efforts to develop new therapies," said Anja Krammer, the company's CEO. "He keenly understands the potential our science has to redefine the way doctors treat age-related conditions, and shares our commitment to delivering a steady stream of new solutions to the clinic."

Sebastiano, who has conducted research at prominent universities in Europe and the United States, looks forward to bringing his academic research to life by guiding the development of Turn Bio's therapies

"The next months will be incredibly exciting, as we bridge the gap between academic science and the life-changing therapies so desperately needed by millions of people around the world," said Sebastiano. "We have the potential to cure diseases that are currently untreatable, improve the quality of life for millions and truly transform and democratize medical care."

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Sebastiano received his bachelor's and doctoral degrees from Universit di Pavia in Italy and completed post-doctoral work at the Max Planck Institute for Molecular Biomedicine in Germany and Stanford. Since 2014, he has been an associate professor of OBGyN at Stanford in the Stanford Institute for Stem Cell Biology. He is the Woods Family Scholar in Pediatric Medicine, has served as co-director of the Stanford Stem Cell PhD Program and has received prestigious awards for his pioneering and revolutionizing approach to induce cellular rejuvenation, including the 2017 American Federation for Aging Research (AFAR) Junior Investigator Award and the 2019 Breakthrough in Gerontology Award by AFAR and the Glenn Foundation.

ABOUT TURN BIOTECHNOLOGIES

Turn Bio is a pre-clinical-stage company focused on repairing tissue at the cellular level. The company's proprietary mRNA platform technology, ERA, restores optimal gene expression by combatting the effects of aging in the epigenome. This restores the cells' ability to prevent or treat disease, heal or regenerate tissue and fight incurable chronic diseases.

The company is currently completing pre-clinical research on tailored therapies targeting indications in dermatology and immunology, as well as developing therapies for ophthalmology, osteo-arthritis and the muscular system. For more information, see http://www.turn.bio.

FOR MORE INFORMATION, CONTACT:

Jim Martinez, rightstorygroup jim@rightstorygroup.comor (312) 543-9026

SOURCE Turn Biotechnologies

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Prominent Stanford University scientist and cellular reprogramming innovator will oversee all research for Turn Bio - Yahoo Finance

Beam Therapeutics Announces Pipeline and Business Highlights and Reports Second Quarter 2022 Financial Results – GlobeNewswire

Patient Enrollment into BEACON Phase 1/2 Trial of BEAM-101 On-track for Second Half of 2022

BEAM-201 IND Submitted to FDA; Currently on Clinical Hold

BEAM-102 IND Submission and BEAM-301 IND-enabling Studies On-track for Second Half of 2022

John Lo, Ph.D., Appointed as Chief Commercial Officer

Ended Second Quarter 2022 with $1.2 Billion in Cash, Cash Equivalents and Marketable Securities to Support Advancement of Broad Precision Genetic Medicines Portfolio

CAMBRIDGE, Mass., Aug. 09, 2022 (GLOBE NEWSWIRE) -- Beam Therapeutics Inc. (Nasdaq: BEAM), a biotechnology company developing precision genetic medicines through base editing, today provided pipeline and business updates and reported financial results for the second quarter ended June 30, 2022.

2022 is a critical year for Beams transition to becoming a multi-program clinical-stage company, as we prepare for the near-term initiation of patient enrollment in our BEACON Phase 1/2 trial, the first clinical trial evaluating BEAM-101 in patients with sickle cell disease, said John Evans, chief executive officer of Beam. In June, we submitted our IND for BEAM-201 for CD7-positive T-cell malignancies and recently received notification from the FDA of a clinical hold on the IND. We look forward to receiving more detail from the FDA and working with them in an effort to advance BEAM-201 for these difficult-to-treat cancer indications. We are on track to further expand our portfolio with a steady cadence of clinical and preclinical milestones expected in the quarters ahead, including the IND submission for BEAM-102, our second program in sickle cell disease, and the initiation of IND-enabling studies for BEAM-301, our first liver-directed base editing program in glycogen storage disease, both targeted in the second half of this year.

Mr. Evans added, As pioneers and leaders in the field of base editing, weve continued to extend the potential reach of our base editing technology and applications with the development of new base editors, as well as novel base editing-enabled therapeutic strategies, such as our work on non-genotoxic conditioning to improve transplant regimens. Weve also continued to enhance our team, and Im thrilled to welcome John Lo as chief commercial officer. John has a deep science background and an extensive track record in the strategic development and commercialization of novel medicines, including cell therapy products, at leading companies. I cant wait to work with him to advance our portfolio and our vision of providing a new class of precision genetic medicines to patients.

Pipeline Updates & Anticipated Milestones Ex Vivo HSC Programs

Ex Vivo T Cell Programs

In Vivo LNP Liver-targeting Programs

Recent Research Highlights

Business Updates

Second Quarter 2022 Financial Results

About Beam Therapeutics Beam Therapeutics (Nasdaq: BEAM) is a biotechnology company committed to establishing the leading, fully integrated platform for precision genetic medicines. To achieve this vision, Beam has assembled a platform that includes a suite of gene editing and delivery technologies and is in the process of building internal manufacturing capabilities. Beams suite of gene editing technologies is anchored by base editing, a proprietary technology that is designed to enable precise, predictable and efficient single base changes, at targeted genomic sequences, without making double-stranded breaks in the DNA. This has the potential to enable a wide range of potential therapeutic editing strategies that Beam is using to advance a diversified portfolio of base editing programs. Beam is a values-driven organization committed to its people, cutting-edge science, and a vision of providing life-long cures to patients suffering from serious diseases.

Cautionary Note Regarding Forward-Looking Statements This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Investors are cautioned not to place undue reliance on these forward-looking statements, including, but not limited to, statements related to: our upcoming presentation at the 2022 International HBV Meeting; our plans, and anticipated timing, to nominate additional development candidates, initiate IND-enabling studies, submit IND applications, and initiate clinical trials; our expectation that we are on-track to further expand our portfolio with a steady cadence of clinical and preclinical milestones expected in the quarters ahead; our expectations for transitioning to a multi-program clinical stage company; the potential economic benefits that may be achieved under our amended collaboration agreement with Verve Therapeutics; the therapeutic applications and potential of our technology, including with respect to SCD and our conditioning regimens, T-ALL/T-LL, GSDIa, Alpha-1, HBV, and CAR-T cells; the expected timing of enrolling the first subject in our BEACON Phase 1/2 clinical trial of BEAM-101; the clinical hold on our BEAM-201 IND, including the FDAs communication plans related to, and our plans and expectations for interactions with the FDA and the outcomes in connection therewith; the sufficiency of our capital resources to fund operating expenses and capital expenditure requirements; and our ability to develop life-long, curative, precision genetic medicines for patients through base editing. Each forward-looking statement is subject to important risks and uncertainties that could cause actual results to differ materially from those expressed or implied in such statement, including, without limitation, risks and uncertainties related to: our ability to develop, obtain regulatory approval for, and commercialize our product candidates, which may take longer or cost more than planned; our ability to raise additional funding, which may not be available; our ability to obtain, maintain and enforce patent and other intellectual property protection for our product candidates; the potential impact of the COVID-19 pandemic, including its impact on the global supply chain; the uncertainty that our product candidates, including BEAM-201, will receive regulatory approval necessary to initiate human clinical studies; uncertainty in the FDAs plans to communicate and discuss the clinical hold on the BEAM-201 IND with us and the risk that those discussions may be delayed; the uncertainty in the outcome of our interactions with the FDA regarding the clinical hold on the BEAM-201 IND; that preclinical testing of our product candidates and preliminary or interim data from preclinical studies and clinical trials may not be predictive of the results or success of ongoing or later clinical trials; that enrollment of our clinical trials may take longer than expected; that our product candidates may experience manufacturing or supply interruptions or failures; risks related to competitive products; and the other risks and uncertainties identified under the headings Risk Factors Summary and Risk Factors in our Annual Report on Form 10-K for the year ended December 31, 2021, and in any subsequent filings with the Securities and Exchange Commission. These forward-looking statements speak only as of the date of this press release. Factors or events that could cause our actual results to differ may emerge from time to time, and it is not possible for us to predict all of them. We undertake no obligation to update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by applicable law.

This press release contains hyperlinks to information that is not deemed to be incorporated by reference in this press release.

Contacts:

Investors: Chelcie Lister THRUST Strategic Communications chelcie@thrustsc.com

Media: Dan Budwick 1AB dan@1abmedia.com

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Beam Therapeutics Announces Pipeline and Business Highlights and Reports Second Quarter 2022 Financial Results - GlobeNewswire

Hisashi Ouchi Suffered an 83-day Death By Radiation Poisoning – HowStuffWorks

On the morning of Sept. 30, 1999, at a nuclear fuel-processing plant in Tokaimura, Japan, 35-year-old Hisashi Ouchi and two other workers were purifying uranium oxide to make fuel rods for a research reactor.

As this account published a few months later in The Washington Post details, Ouchi was standing at a tank, holding a funnel, while a co-worker named Masato Shinohara poured a mixture of intermediate-enriched uranium oxide into it from a bucket.

Suddenly, they were startled by a flash of blue light, the first sign that something terrible was about to happen.

The workers, who had no previous experience in handling uranium with that level of enrichment, inadvertently had put too much of it in the tank, as this 2000 article in Bulletin of the Atomic Scientists details. As a result, they inadvertently triggered what's known in the nuclear industry as a criticality accident a release of radiation from an uncontrolled nuclear chain reaction.

Ouchi, who was closest to the nuclear reaction, received what probably was one of the biggest exposures to radiation in the history of nuclear accidents. He was about to suffer a horrifying fate that would become a cautionary lesson of the perils of the Atomic Age.

"The most obvious lesson is that when you're working with [fissile] materials, criticality limits are there for a reason," explains Edwin Lyman, a physicist and director of nuclear power safety for the Union of Concerned Scientists, and co-author, with his colleague Steven Dolley, of the article in Bulletin of the Atomic Scientists.

If safeguards aren't carefully taught and followed, there's potential for "a devastating type of accident," Lyman says.

It wasn't the first time it had happened. A 2000 U.S. Nuclear Regulatory Commission report noted that before Tokaimura, 21 previous criticality accidents had occurred between 1953 and 1997.

The two workers quickly left the room, according to The Post's account. But even so, the damage already had been done. Ouchi, who was closest to the reaction, had received a massive dose of radiation. There have been various estimates of the exact amount, but a 2010 presentation by Masashi Kanamori of the Japan Atomic Energy Agency put the amount at 16 to 25 gray equivalents (GyEq), while Shinohara, who was about 18 inches (46 centimeters) away, received a lesser but still extremely harmful dose of about 6 to 9 GyEq and a third man, who was further away, was exposed to less radiation.

Internet articles frequently describe Ouchi as 'the most radioactive man in history,' or words to that effect, but nuclear expert Lyman stops a bit short of that assessment.

"The estimated doses for Ouchi were among the highest known, though I'm not sure if it's the highest," explains Lyman. "These typically occur in these kinds of criticality accidents."

The radiation dose in a criticality accident can be even worse than in a catastrophic accident at a nuclear power plant, such as the 1986 reactor explosion at Chernobyl in Ukraine, then a part of the Soviet Union, where the radiation was dispersed. (Even so, 28 people eventually died from radiation exposure.)

"These criticality accidents present the potential for delivery of a large amount of radiation in a short period of time, though a burst of neutrons and gamma rays," Lyman says. "That one burst, if you're close enough, you can sustain more than a lethal dose of radiation in seconds. So that's the scary thing about it."

High doses of radiation damage the body, rendering it unable to make new cells, so that the bone marrow, for example, stops making the red blood cells that carry oxygen and the white blood cells that fight infection, according to Lyman. "Your fate is predetermined, even though there will be a delay," he says, "if you have a high enough dose of ionizing radiation that will kill cells, to the extent that your organs will not function."

According to an October 1999 account in medical journal BMJ, the irradiated workers were taken to the National Institute of Radiological Sciences in Chiba, just east of Tokyo. There, it was determined that their lymphatic blood count had dropped to almost zero. Their symptoms included nausea, dehydration and diarrhea. Three days later, they were transferred to University of Tokyo Hospital, where doctors tried various measures in a desperate effort to save their lives.

When Ouchi, a handsome, powerfully built, former high school rugby player who had a wife and young son, arrived at the hospital, he didn't yet look like a victim of intense radiation exposure, according to "A Slow Death: 83 Days of Radiation Sickness," a 2002 book by a team of journalists from Japan's NHK-TV, later translated into English by Maho Harada. His face was slightly red and swollen and his eyes were bloodshot, but he didn't have any blisters or burns, though he complained of pain in his ears and hand. The doctor who examined him even thought that it might be possible to save his life.

But within a day, Ouchi's condition got worse. He began to require oxygen, and his abdomen swelled, according to the book. Things continued downhill after he arrived at the University of Tokyo hospital. Six days after the accident, a specialist who looked at images of the chromosomes in Ouchi's bone marrow cells saw only scattered black dots, indicating that they were broken into pieces. Ouchi's body wouldn't be able to generate new cells. A week after the accident, Ouchi received a peripheral blood stem cell transplant, with his sister volunteering as a donor.

Nevertheless, Ouchi's condition continued to deteriorate, according to the book. He began to complain of thirst, and when medical tape was removed from his chest, his skin started coming off with it. He began developing blisters. Tests showed that the radiation had killed the chromosomes that normally would enable his skin to regenerate, so that his epidermis, the outer layer that protected his body, gradually vanished. The pain became intense. He began experiencing breathing problems as well. Two weeks after the accident, he was no longer able to eat, and had to be fed intravenously. Two months into his ordeal, his heart stopped, though doctors were able to revive him.

On Dec. 21, at 11:21 p.m., Ouchi's body finally gave out. According to Lyman's and Dolley's article, he died of multiple organ failure. Japan's Prime Minister at the time, Keizo Obuchi, issued a statement expressing his condolences to the worker's family and promised to improve nuclear safety measures, according to Japan Times.

Shinohara, Ouchi's co-worker, died in April 2000 of multiple organ failure as well, according to The Guardian.

The Japanese government's investigation concluded that the accident's main causes included inadequate regulatory oversight, lack of an appropriate safety culture, and inadequate worker training and qualification, according to this April 2000 report by the U.S. Nuclear Regulatory Commission. Six officials from the company that operated the plant were charged with professional negligence and violating nuclear safety laws. In 2003, a court gave them suspended prison terms, and the company and at least one of the officials also were assessed fines, according to the Sydney Morning Herald.

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Hisashi Ouchi Suffered an 83-day Death By Radiation Poisoning - HowStuffWorks

Regen BioPharma Inc (OTCMKTS: RGBP) Breaking Out as Biotech Files Patent on Dendritic Cell Technologies to Augment Efficacy of Survivin mRNA Cancer…

Regen BioPharma Inc (OTCMKTS: RGBP) is making a powerful reversal rocketing back into penny land on Friday up 46% on $1.6 million in dollar volume. RGBP has a massive following of shareholders, many of them international that are jumping on board and accumulating heavily now that RGBP has reversed. Several weeks ago, the Company announced the filing with the United States Patent and Trademark Office of a provisional patent application covering utilization of dendritic cell technologies to augment efficacy of its patented survivin mRNA cancer immunotherapeutic vaccine. RGBP CEO Dr. David Koos stated: We are proud of our collaborators and colleagues who have worked on our first issued survivin patent, which was filed in 2015, before the world realized the potency of modified-mRNA technology that was first successfully commercialized with the COVID-19 vaccines by Moderna and Pfizer. The currently filed application discloses means of significantly increasing efficacy by combining modified-mRNA with unique cellular immunotherapy as well as adjuvant approaches. We chose this strategy to maximally protect our intellectual property around this potentially very valuable mRNA cancer immunotherapy vaccine.

Microcapdaily has been reporting on RGBP since early last year. The last time we covered the Company we stated among other things: RGBP is one of the most followed stocks in small caps with a huge investors base and it has a long history of big moves skyrocketing to 8 cents plus twice over the past 12 months. There are also plenty of buyout rumors on RGBP; notably in the July PR Dr. koos stated: We are proud of our collaborators and colleagues who have worked on our first issued survivin patent, which was filed in 2015, before the world realized the potency of modified-mRNA technology that was first successfully commercialized with the COVID-19 vaccines by Moderna and Pfizer. Rumors are circulating that Dr. Koos has offers for either a B/O or potential joint ventures, licensing, partnerships, or a merger. He wants to get the best offer out there. Regen owns a valuable intellectual property portfolio including 8 issued patents and 13 published patent applications, these patents address enormous billion-dollar markets. RGBP has not seen the kind of volume and interest it showed on Friday in a long time and looks to be preparing to embark on something substantial here.

Regen BioPharma Inc (OTCMKTS: RGBP) is focused on the immunology and immunotherapy space. The Company is focused on rapidly advancing novel technologies through pre-clinical and Phase I/ II clinical trials. Currently, the Company is focused on mRNA and small molecule therapies for treating cancer and autoimmune disorders.

Regen owns a valuable intelectuable property portfolio including 8 issued patents and 13 published patent applications. Zander Therapeutics, Inc. (a company under common control) has been granted an exclusive license to develop and commercialize IP controlled by the Company for non-human veterinary therapeutic use. Regen has granted an exclusive license to Oncology Pharma, Inc. to develop and commercialize Antigen specific mRNA cellular cancer vaccines for the treatment of pancreatic cancer and KCL Therapeutics, Inc. has granted an exclusive license to Oncology Pharma, Inc. to develop and commercialize certain intellectual property for the treatment of colon cancer.

The Company is led by CEO David Koos who has over 30 years of investment banking and venture capital experience. He has a deep knowledge of startup businesses, public markers and SEC reporting companies. Dr. Koos has extensive relationships with large and small financial institutions, hedge funds and entities that Regen BioPharma expects to leverage for company growth. Dr. Koos has a Ph.D. in Sociology and a Doctor of Business Administration with an emphasis in finance. Additionally, he has authored / co-authored numerous peer reviewed journal articles. Dr. Koos worked hard to get the filings up to date and get the Company compliant which has recently been completed with RGBP now pink current

Earlier this year RGBP announced a program to accelerate the clinical development of its NR2F6 therapies. The Company intends to combine modified mRNA technology with Regens existing siRNA (small interfering RNA) intellectual property targeting the NR2F6 nuclear receptor which has been identified as a potentially very important immune cell inhibitor (an immune checkpoint) and cancer stem cell differentiator. mRNA is a single-stranded molecule that carries genetic code from DNA in a cells nucleus to ribosomes (the cells protein-making machinery).

Regen has filed an Investigational New Drug Application (IND#16928) for their drug termed tCellVax with the U.S. FDA. tCellVax is intended to utilize siRNA to silence NR2F6 activity in human immune cells thereby activating these immune cells in such a way that they can attack cancer cells. The Company believes that adding new intellectual property utilizing modified mRNA will profoundly simplify the drug development process and thus speed development. Dyo Biotechnologies has been contracted to assist Regen with the development of the above-mentioned technology.

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On July 26 RGBP announced the filing with the United States Patent and Trademark Office of a provisional patent application covering utilization of dendritic cell technologies to augment efficacy of its patented survivin mRNA cancer immunotherapeutic vaccine.

In 2021 the Company was granted US patent # 11,090,332 on composition of matter of survivin modified-mRNA useful for teaching the immune system to kill cancer. In the current patent, specific types of dendritic cells, means of generating specialized dendritic cells, and the planned formulation that will enter clinical trials have been granted patent protection.

Immunotherapy of cancer represents a very large market which is currently being led by the class of drugs called checkpoint inhibitors and CAR-T cells. To date there is no mRNA immunotherapy available for treating cancer. This patent application protects the use of our patented survivin mRNA both as a stand-alone vaccine and as an immunotherapy.

RGBP CEO Dr. David Koos stated: We are proud of our collaborators and colleagues who have worked on our first issued survivin patent, which was filed in 2015, before the world realized the potency of modified-mRNA technology that was first successfully commercialized with the COVID-19 vaccines by Moderna and Pfizer. The currently filed application discloses means of significantly increasing efficacy by combining modified-mRNA with unique cellular immunotherapy as well as adjuvant approaches. We chose this strategy to maximally protect our intellectual property around this potentially very valuable mRNA cancer immunotherapy vaccine.

For more on RGBP Subscribe Right Now!

Currently trading at a $55 million market valuation RGBP has 5,024,517,324 shares outstanding and a debt load that has caused significant dilution in the past. But RGBP is an exciting story developing in small caps, at current levels the selling pressure that decimated the share price from over $0.08 to half a penny is gone and buyers have stepped in and are accumulating heavily at current levels. RGBP is no stranger to big moves and has runner in its blood skyrocketing to $0.0819 not once but twice in the past year alone. Several weeks ago, the Company announced the filing with the United States Patent and Trademark Office of a provisional patent application covering utilization of dendritic cell technologies to augment efficacy of its patented survivin mRNA cancer immunotherapeutic vaccine. RGBP CEO Dr. David Koos stated: We are proud of our collaborators and colleagues who have worked on our first issued survivin patent, which was filed in 2015, before the world realized the potency of modified-mRNA technology that was first successfully commercialized with the COVID-19 vaccines by Moderna and Pfizer. The currently filed application discloses means of significantly increasing efficacy by combining modified-mRNA with unique cellular immunotherapy as well as adjuvant approaches. We chose this strategy to maximally protect our intellectual property around this potentially very valuable mRNA cancer immunotherapy vaccine. Rumors are circulating that Dr. Koos has offers for either a B/O or potential joint ventures, licensing, partnerships, or a merger. He wants to get the best offer out there. Regen owns a valuable intellectual property portfolio including 8 issued patents and 13 published patent applications, these patents address enormous billion-dollar markets. RGBP has not seen the kind of volume and interest it showed on Friday in a long time and looks to be preparing to embark on something substantial here. We will be updating on RGBP when more details emerge so make sure you are subscribed to Microcapdaily so you know whats going on with RGBP.

Disclosure: we hold no position in RGBP either long or short and we have not been compensated for this article

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Regen BioPharma Inc (OTCMKTS: RGBP) Breaking Out as Biotech Files Patent on Dendritic Cell Technologies to Augment Efficacy of Survivin mRNA Cancer...

Stem Cell Therapy Global Market Report 2022: Rapid Growth in Emerging Markets & An Increase in Investments in Cell and Gene Therapies Driving…

DUBLIN--(BUSINESS WIRE)--The "Stem Cell Therapy Global Market Opportunities And Strategies To 2031" report has been added to ResearchAndMarkets.com's offering.

The global stem cell therapy market reached a value of nearly $4,019.6 million in 2021, having increased at a compound annual growth rate (CAGR) of 70.9% since 2016. The market is expected to grow from $4,019.6 million in 2021 to $10,600.2 million in 2026 at a rate of 21.4%. The market is then expected to grow at a CAGR of 11.4% from 2026 and reach $18,175.4 million in 2031.

Growth in the historic period in the stem cell therapy market resulted from rising prevalence of chronic diseases, a rise in funding from governments and private organizations, rapid growth in emerging markets, an increase in investments in cell and gene therapies, surge in healthcare expenditure, and an increase in pharmaceutical R&D expenditure. The market was restrained by low healthcare access in developing countries, limited reimbursements, and ethical concerns related to the use of embryonic stem cells in the research and development.

Going forward, increasing government support, rapid increase in the aging population, rising research and development spending, and increasing healthcare expenditure will drive market growth. Factors that could hinder the growth of the market in the future include high cost of stem cell therapy, stringent regulations imposed by regulators, and high cost of storage of stem cells.

The stem cell therapy market is segmented by type into allogeneic stem cell therapy and autologous stem cell therapy. The autologous stem cell therapy segment was the largest segment of the stem cell therapy market segmented by type, accounting for 100% of the total in 2021.

The stem cell therapy market is also segmented by cell source into adult stem cells, induced pluripotent stem cells, and embryonic stem cells. The induced pluripotent stem cells was the largest segment of the stem cell therapy market segmented by cell source, accounting for 77.2% of the total in 2021. Going forward, the adult stem cells segment is expected to be the fastest growing segment in the stem cell therapy market segmented by cell source, at a CAGR of 21.7% during 2021-2026.

The stem cell therapy market is also segmented by application into musculoskeletal disorders and wounds & injuries, cancer, autoimmune disorders, and others. The cancer segment was the largest segment of the stem cell therapy market segmented by application, accounting for 49.7% of the total in 2021. Going forward, musculoskeletal disorders and wounds & injuries segment is expected to be the fastest growing segment in the stem cell therapy market segmented by application, at a CAGR of 22.1% during 2021-2026.

The stem cell therapy market is also segmented by end-users into hospitals and clinics, research centers, and others. The hospitals and clinics segment was the largest segment of the stem cell therapy market segmented by end-users, accounting for 66.0% of the total in 2021. Going forward, hospitals and clinics segment is expected to be the fastest growing segment in the stem cell therapy market segmented by end-users, at a CAGR of 22.0% during 2021-2026.

Scope:

Markets Covered:

Key Topics Covered:

1. Stem Cell Therapy Market Executive Summary

2. Table of Contents

3. List of Figures

4. List of Tables

5. Report Structure

6. Introduction

7. Stem Cell Therapy Market Characteristics

8. Stem Cell Therapy Trends And Strategies

9. Impact Of Covid-19 On Stem Cell Therapy Market

10. Global Stem Cell Therapy Market Size And Growth

11. Global Stem Cell Therapy Market Segmentation

12. Stem Cell Therapy Market, Regional And Country Analysis

13. Asia-Pacific Stem Cell Therapy Market

14. Western Europe Stem Cell Therapy Market

15. Eastern Europe Stem Cell Therapy Market

16. North America Stem Cell Therapy Market

17. South America Stem Cell Therapy Market

18. Middle East Stem Cell Therapy Market

19. Africa Stem Cell Therapy Market

20. Stem Cell Therapy Global Market Competitive Landscape

21. Stem Cell Therapy Market Pipeline Analysis

22. Key Mergers And Acquisitions In The Stem Cell Therapy Market

23. Stem Cell Therapy Market Opportunities And Strategies

24. Stem Cell Therapy Market, Conclusions And Recommendations

25. Appendix

Companies Mentioned

For more information about this report visit https://www.researchandmarkets.com/r/3yzskj

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Stem Cell Therapy Global Market Report 2022: Rapid Growth in Emerging Markets & An Increase in Investments in Cell and Gene Therapies Driving...

Autologous Cell Therapy Market Size to Grow by USD 4.11 billion, Bayer AG and Brainstorm Cell Therapeutics Inc. Among Key Vendors – Technavio – PR…

Get a comprehensive report summary describing the market size and forecast along with research methodology. View our Sample Report

Autologous Cell Therapy Market 2021-2025: Scope

The autologous cell therapy market report covers the following areas:

Autologous Cell Therapy Market 2021-2025: Segmentation

Learn about the contribution of each segment summarized in concise infographics and thorough descriptions. View a PDF Sample Report

Autologous Cell Therapy Market 2021-2025: Vendor Analysis

We provide a detailed analysis of around 25 vendors operating in the autologous cell therapy market, including Bayer AG, Brainstorm Cell Therapeutics Inc., Daiichi Sankyo Co. Ltd., FUJIFILM Holdings Corp., Holostem Terapie Avanzate Srl, Osiris Therapeutics Inc., Takeda Pharmaceutical Co. Ltd., Teva Pharmaceutical Industries Ltd., Sumitomo Chemical Co. Ltd., and Vericel Corp. among others. The key offerings of some of these vendors are listed below:

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Autologous Cell Therapy Market 2021-2025: Key Highlights

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Autologous Cell Therapy Market Scope

Report Coverage

Details

Page number

120

Base year

2020

Forecast period

2021-2025

Growth momentum & CAGR

Accelerate at a CAGR of 14.16%

Market growth 2021-2025

USD 4.11 billion

Market structure

Fragmented

YoY growth (%)

13.5

Regional analysis

North America, Europe, APAC, and South America

Performing market contribution

North America at 43%

Key consumer countries

US, UK, Germany, Canada, and Japan

Competitive landscape

Leading companies, competitive strategies, consumer engagement scope

Companies profiled

Bayer AG, Brainstorm Cell Therapeutics Inc., Daiichi Sankyo Co. Ltd., FUJIFILM Holdings Corp., Holostem Terapie Avanzate Srl, Osiris Therapeutics Inc., Takeda Pharmaceutical Co. Ltd., Teva Pharmaceutical Industries Ltd., Sumitomo Chemical Co. Ltd., and Vericel Corp.

Market Dynamics

Parent market analysis, market growth inducers and obstacles, fast-growing and slow-growing segment analysis, COVID-19 impact and future consumer dynamics, market condition analysis for the forecast period

Customization purview

If our report has not included the data that you are looking for, you can reach out to our analysts and get segments customized.

Table Of Contents :

Executive Summary

Market Landscape

Market Sizing

Five Forces Analysis

Market Segmentation by Product

Customer landscape

Geographic Landscape

Vendor Landscape

Vendor Analysis

Appendix

About Us

Technavio is a leading global technology research and advisory company. Their research and analysis focus on emerging market trends and provide actionable insights to help businesses identify market opportunities and develop effective strategies to optimize their market positions. With over 500 specialized analysts, Technavio's report library consists of more than 17,000 reports and counting, covering 800 technologies, spanning across 50 countries. Their client base consists of enterprises of all sizes, including more than 100 Fortune 500 companies. This growing client base relies on Technavio's comprehensive coverage, extensive research, and actionable market insights to identify opportunities in existing and potential markets and assess their competitive positions within changing market scenarios.

Contact

Technavio Research Jesse Maida Media & Marketing Executive US: +1 844 364 1100 UK: +44 203 893 3200 Email: [emailprotected] Website: http://www.technavio.com/

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Autologous Cell Therapy Market Size to Grow by USD 4.11 billion, Bayer AG and Brainstorm Cell Therapeutics Inc. Among Key Vendors - Technavio - PR...

Grafted hPSC-derived GABA-ergic interneurons regulate seizures and specific cognitive function in temporal lobe epilepsy | npj Regenerative Medicine -…

hMGE cell grafting substantially reduced SRS in chronically epileptic rats (CERs)

The effect of grafting hMGE progenitors expressing the Gi-protein-coupled receptor hM4Di into the hippocampus of CERs was evaluated on SRS activity in the fourth month after grafting through continuous video-electroencephalographic (video-EEG) recordings (Fig. 1). The CERs receiving grafts were immunosuppressed with daily cyclosporine A injections (10mg/kg) starting two days before grafting and continuing until the experimental endpoint to avoid transplant rejection. Ungrafted control CERs also received the same regimen of cyclosporine injections to identify any cyclosporine-induced effects on seizures. The total numbers of SRS and stage V-SRS and the total time spent in seizure activity were measured. Compared to ungrafted CERs, grafted CERs displayed substantial reductions in the number of SRS/hour (76% reduction, p<0.0001, unpaired, two-tailed Students t test Fig. 2a), number of stage V-SRS/hour (87% reduction, p<0.0001, unpaired, two-tailed Students t test, Fig. 2b), and the total time spent in seizure activity (76% reduction, p<0.0001, unpaired, two-tailed Students t test, Fig. 2c). Thus, grafting of hPSC-derived hMGE progenitors into the hippocampus in the chronic phase of TLE significantly reduced both frequency and intensity of SRS.

Quantification in the 4th month after grafting via continuous video-EEG recordings revealed that compared to the group of CERs receiving no grafts, the group of CERs receiving hMGE cell grafts displayed greatly decreased frequencies of all SRS (a) and stage V SRS (b). The grafted animals also spent much less time in seizure activity (c). df illustrate electroencephalographic (EEG) traces during the pre-clozapine-N-oxide (CNO), CNO, and post-CNO periods. Values in bar charts are presented as meanS.E.M. ****p<0.0001 (unpaired, two-tailed Students t test).

Continuous video-EEG recordings before (days 15), during (days 68), and 2 days after (days 1114) silencing the graft-derived GABA-ergic interneurons through CNO injections evaluated the influence of graft-derived interneurons in controlling SRS activity in CERs receiving grafts. Examples of EEG traces during the pre-CNO, CNO, and post-CNO periods are illustrated (Fig. 2df). Because the action of CNO is expected to last 23h after each administration and to avoid effects associated with its accumulation due to repeated administration, we administered CNO once every 8h to activate DREADDs. Also, we employed 2 days of washout period to avoid any trace amounts of CNO interfering with the post-CNO results. Silencing of graft-derived neurons substantially escalated SRS activity in CERs compared to the extent of SRS activity before CNO administration (Fig. 3ac). Overall, one-way analysis of variance (ANOVA) with the NewmanKeuls multiple comparison tests revealed that there was a 1.49.7-fold increase in the frequency of all SRS (p<0.01, Fig. 3a), 1.26.4-fold increase in the frequency of stage V-SRS (p<0.05, Fig. 3b), and 1.36.2-fold increase in the total time spent in SRS activity (p<0.05, Fig. 3c). Then, the effect of CNO washout on SRS activity was evaluated two days after the last CNO injection. All parameters of SRS activity were restored to pre-CNO levels. One-way ANOVA with Newman-Keuls multiple comparison tests showed that compared to the CNO period, the frequencies of SRS and stage V-SRS were reduced by 5771% (p<0.01, Fig. 3a, b), and the time spent in seizure activity was reduced by 60% (p<0.05, Fig. 3c).

The bar charts ac compare all SRS and stage V SRS frequencies and times spent in SRS activity (% of recorded time) during pre-CNO, CNO, and post-CNO periods. The bar charts df compare all SRS and stage V SRS frequencies and times spent in SRS activity during the pre-CNO (days 15), CNO (days 68), and post-CNO (days 1114) periods. The bar chart g compares the average electroencephalographic (EEG) power (i.e., spectral density) recorded in interictal periods during pre-CNO, CNO, and post-CNO phases. Values in bar charts are presented as meanS.E.M. *p<0.05; **p<0.01; NS, non-significant (one-way ANOVA with NewmanKeuls multiple comparisons test).

We also evaluated the seizure parameters/day in the pre-CNO (days 15), CNO (days 68), and post-CNO periods (days 1114; Fig. 3df) using one-way ANOVA with the NewmanKeuls multiple comparison tests. In CERs receiving grafts, the total SRS and stage-V SRS/day and the time spent in SRS activity/day were lower in the pre-CNO period. There was no difference in seizure activity over five days in this phase (p>0.05). The administration of CNO enhanced the total SRS and stage-V SRS/day and the time spent in SRS/day. Furthermore, comparable seizure activity was seen over the 3-day CNO period (p>0.05; Fig. 3df). The total number of all SRS on day 7 in the CNO period was higher than all SRS on pre-CNO days 15 (p<0.05; Fig. 3d). Also, the number of stage-V SRS on day 7 in the CNO period was significantly higher than stage-V SRS recorded on pre-CNO days 1 and 3 (p<0.05; Fig. 3e). Notably, all parameters of seizures/day declined in the post-CNO period after two days of CNO washout (Fig. 3df). Also, there was no difference in seizure activity during the four-day post-CNO period (p>0.05). The total numbers of all SRS on days 1214 in the post-CNO period were significantly lower than all SRS recorded on day 7 in the CNO period (p<0.05; Fig. 3d). Additionally, all parameters of seizures were comparable between pre-CNO (days 15) and post-CNO (days 1114) periods (p>0.05; Fig. 3df), implying that the inhibitory function of graft-derived interneurons is restored after the CNO washout period.

Furthermore, we performed spectral analysis of EEG activity in interictal periods by measuring randomly chosen thirty-minute duration interictal segments devoid of noise signals (610 segments/animal, n=5/group). One-way ANOVA with the Newman-Keuls multiple comparison tests revealed that compared to the pre-CNO period, the average EEG power enhanced in the CNO period (p<0.05, Fig. 3g). However, following the CNO washout, the EEG power declined substantially (p<0.05, Fig. 3g). Also, the percentage of waves is significantly reduced in the CNO period compared to the pre-CNO period (meanS.E.M., pre-CNO period 17.53.0; CNO period, 8.71.2; p<0.05) but increased following CNO washout (111.9). Overall, in addition to enhancing the frequency and intensity of SRS, silencing graft-derived GABA-ergic interneurons through CNO injections resulted in enhanced interictal activity, which subsequently waned after the CNO washout.

Next, to examine the direct effect of CNO on SRS activity, we measured SRS activity in CERs that did not receive grafts with CNO administration. One-way ANOVA with the NewmanKeuls multiple comparison tests demonstrated that the frequencies of all SRS and stage V-SRS and the time spent in SRS activity remained comparable across pre-CNO, CNO administration, and post-CNO periods (p>0.05, Fig. 4ac). Thus, in CERs receiving hMGE cell grafts, SRS activity increased when graft-derived GABA-ergic interneuron function was blocked, implying the direct involvement of graft-derived interneurons in seizure control. Furthermore, CNO alone did not affect SRS activity, as CNO administration in CERs receiving no grafts did not change all SRS and stage V-SRS frequencies or the time spent in SRS activity.

The bar charts ac compare all SRS and stage V SRS frequencies and times spent in SRS activity (% of recorded time) during the pre-CNO, CNO, and post-CNO periods in CERs receiving no grafts. Values in bar charts are presented as meanS.E.M. NS, non-significant (one-way ANOVA with NewmanKeuls multiple comparisons test).

We employed an object location test (OLT) to examine the cognitive ability of animals to detect subtle changes in their immediate environment (Fig. 5a), a function linked to normal network activity in the hippocampus36,37. In OLT, the animals with altered hippocampal circuitry/dysfunction consistently show an inability to detect minor alterations in the environment. Naive control rats recognized the change that occurred in the position of one of the objects by exploring the object in the novel place (OINP) for significantly greater periods than the object that remained in the familiar place (OIFP, p<0.0001, unpaired, two-tailed Students t test, Fig. 5b) in trial-3 (T3). In contrast, CERs receiving no grafts showed impaired cognitive function by spending nearly equal amounts of their object exploration time with the OINP and the OIFP (p>0.05, unpaired, two-tailed Students t test, Fig. 5c). Notably, CERs receiving hMGE cell grafts behaved similarly to naive control rats by showing a greater affinity for the OINP than the OIFP (p<0.01, unpaired, two-tailed Students t test, Fig. 5d). These results suggest that grafting of hPSC-derived hMGE cells into the hippocampus could alleviate chronic epilepsy-related object location memory impairment.

a depicts the various trials involved in an object location test (OLT). The bar charts in be compare percentages of time spent with the object in the familiar place (OIFP) and the object in the novel place (OINP) in naive control rats (b), chronically epileptic rats (CERs; c), and CERs with hMGE grafts before and during the clozapine-N-oxide (CNO) treatment (d, e). The bar chart in f compares the time spent with the OINP across the four groups with ANOVA. Object location memory was impaired in CERs with no grafts and CERs with grafts when graft-derived interneurons were silenced. g shows the various trials involved in a pattern separation test (PST). The bar charts in hk compare percentages of time spent with the familiar object on pattern 2 (FO on P2) and the novel object on pattern 2 (NO on P2) in naive control rats (h), CERs (i), and CERs with hMGE grafts before and during the clozapine-N-oxide CNO treatment (j, k). The bar chart in l compares the time spent with the NO on P2 across the four groups with ANOVA. Note that pattern separation ability was impaired in CERs with no grafts. However, CERs with grafts displayed pattern separation ability even when the graft-derived interneurons were silenced with CNO. Values in bar charts are presented as meanS.E.M. *p<0.05, **p<0.01, ***p<0.001, ****p<0.0001, NS, non-significant (be, hk, unpaired, two-tailed Students t test; f, l, one-way ANOVA with NewmanKeuls multiple comparisons test).

To investigate the role of graft-derived GABA-ergic interneurons in the object location memory task, we silenced the transplant-derived DREADDs expressing interneurons through CNO administration and performed the OLT with new objects. With the silencing of transplant-derived interneurons, CERs lost their ability to distinguish the OINP from the OIFP, which was evident from their exploration of OINP and OIFP for almost equal periods (p>0.05, unpaired, two-tailed Students t test, Fig. 5e). The parameters such as total object exploration times, distances traveled, or movement velocities were comparable between the pre-CNO and CNO periods (data not illustrated). Comparison of the time spent with the OINP across groups (naive, CERs, CERs + grafts in the pre-CNO and CNO periods) using one-way ANOVA with the Newman-Keuls multiple comparison tests revealed impaired object location memory in CERs with no grafts, and CERs with grafts when graft-derived interneurons were silenced (Fig. 5f). However, in the absence of CNO, CERs with grafts displayed similar object location memory as naive control rats. Thus, graft-derived GABA-ergic interneurons in CERs directly influenced the object location memory function, a hippocampus-dependent cognitive task.

The pattern separation test (PST) examines proficiency in discriminating similar experiences by storing similar representations in a non-overlapping manner and is linked to the dentate gyrus and adult hippocampal neurogenesis38,39. For this test, the movement of each rat was investigated in an open field with four successive trials (5min each), separated by 30-min intervals. The first three trials successively involved the exploration of an open field apparatus (T1), a type of identical objects placed on a floor pattern 1 (P1; T2), and the second type of identical objects placed on a floor pattern 2 (P2; T3). In T4, the animal explored objects on P2, with one of the objects from T3 replaced with an object from T2. The object from T2 is a novel object on pattern 2 (NO on P2), whereas the object retained from T3 is a familiar object on P2 (FO on P2) (Fig. 5g). Naive control animals displayed a greater propensity to explore the NO on P2 than the FO on P2 in T4 (p<0.001, unpaired, two-tailed Students t test, Fig. 5h). CERs receiving no grafts displayed a pattern separation deficit, which was evident from their lack of interest in exploring the NO on P2 for higher periods than the FO on P2 (p>0.05, unpaired, two-tailed Students t test, Fig. 5i). In contrast, CERs receiving grafts showed similar behavior as naive control animals by displaying a greater propensity to explore the NO on P2 than the FO on P2 (p<0.01, unpaired, two-tailed Students t test, Fig. 5j). Thus, grafting of hPSC-derived hMGE cells into the hippocampus alleviated chronic epilepsy-induced pattern separation dysfunction.

To determine whether graft-derived interneurons played a role in restoring the pattern separation function in CERs, we silenced the transplant-derived DREADDs expressing interneurons through CNO administration and performed the PST with new objects and floor patterns. With the silencing of transplant-derived interneurons, CERs did not lose their ability to distinguish the NO on P2 from the FO on P2, which was evident from their exploration of the NO on P2 for higher periods than FO on P2 (p<0.01, unpaired, two-tailed Students t test, Fig. 5k). Furthermore, the parameters such as total object exploration times, distances traveled, or movement velocities were comparable between the pre-CNO and CNO periods (data not illustrated). Comparison of the time spent with the NO on P2 across groups (naive, CERs, CERs + grafts in the pre-CNO and CNO periods) using one-way ANOVA with the Newman-Keuls multiple comparison tests revealed impaired pattern separation function in CERs with no grafts, but not in CERs with grafts even when graft-derived interneurons were silenced (Fig. 5l). Thus, CERs with grafts displayed similar pattern separation ability as naive control rats in the absence and presence of CNO, implying that graft-derived GABA-ergic interneurons in CERs did not directly influence the pattern separation function.

Stereological quantification of HNA+ cells per hippocampus revealed that the overall graft cell yield is >800,000 cells/hippocampus (meanS.E.M=886,26655,967, n=4). Since the graft cell yield per hippocampus was higher than the number of cells initially injected (~300,000 live cells in 3 grafts, ~100,000 cells/graft), the results implied that the grafted progenitors divided a few times after grafting as some donor cells likely die during transplantation.

To confirm DREADD expression in transplant-derived cells, we performed immunofluorescence studies on tissue sections through the hippocampus to visualize human nuclear antigen (HNA, a marker of grafted human cells) and neuron-specific nuclear protein (NeuN, a marker of neurons). Confocal microscopic analyses of HNA and mCherry (the reporter of DREADD expression) revealed that virtually all HNA+ cells in grafts expressed DREADDs (Fig. 6ac). Similar analysis of NeuN and mCherry showed that all neurons within grafts expressed DREADDs (Fig. 6df). The hESC line employed in the study was built by inserting a construct of DREADD and mCherry separated by 2A. Furthermore, the expression of DREADD and mCherry in the cell line is under the control of the universal CAG promoter, and hence mCherry is expressed stably in all cells. Earlier grafting studies have demonstrated similar results using this cell line35,40.

Note that mCherry is displayed in virtually all HNA+ graft-derived cells (ac), NeuN+ neurons (df), and GABA-ergic interneurons (jl). gi demonstrate that a vast majority (meanS.E.M, 80.81.1%) of HNA+ graft-derived cells differentiated into GABA-ergic interneurons. Scale bars: al, 20m.

Next, we determined the differentiation of graft-derived cells into NeuN+ neurons or GABA+ interneurons through HNA and NeuN, or HNA and GABA dual immunofluorescence and Z-section analysis in a confocal microscope. Such quantification demonstrated that ~85% of HNA+ expressed NeuN (meanS.E.M=85.21.2, n=6) and ~81% of HNA+ cells expressed GABA (meanS.E.M=80.81.1%, n=6). Examples of hMGE cells differentiating into GABA-ergic interneurons are illustrated (Fig. 6gi). The overall differentiation is consistent with our earlier grafting study using hiPSC-derived MGE cells as donor cells in an SE model22. Next, to confirm the expression of DREADDs in graft-derived GABA-ergic interneurons, we examined mCherry expression in these interneurons. Virtually all GABA-ergic interneurons expressed mCherry (Fig. 6jl). In addition, transplanted hMGE cells also differentiated into subclasses of GABA-ergic interneurons expressing PV or NPY, which also displayed DREADDs (Fig. 7af). These results suggest that CNO administration could block the function of graft-derived interneurons because of their robust expression of DREADDs.

Gi-protein-coupled receptor hM4Di expression (with mCherry reporter) in parvalbumin (PV) and neuropeptide Y (NPY) expressing interneurons derived from human medial ganglionic eminence progenitor cell grafts in the hippocampus of chronically epileptic rats (af), and putative synapse formation between graft-derived axons and host neurons (gp). Note that mCherry is apparent in PV and NPY+ interneurons derived from graft-derived cells (af). g, l illustrate putative synapse formation between graft-derived presynaptic boutons (green colored structures expressing human synaptophysin (hSyn) and the host postsynaptic density protein 95 (PSD95, red particles) elements on microtubule-associated protein-2 (MAP-2) positive dendrites (blue) in the host CA1 stratum radiatum (g) and the dentate gyrus molecular layer (l). h, m are magnified views of boxed regions in g, l, respectively. ik, np illustrate MAP-2, hSyn, and PSD95 elements in red, green, and blue channels. Scale bars: af, 20m; g, l, 5m; ik, np, 0.5m.

Enhanced frequency and intensity of SRS following silencing of graft-derived GABA-ergic interneurons expressing DREADDs implied connectivity between hMGE graft-derived GABA-ergic interneurons and the host neurons. To confirm this, we employed Z-section analyses in a confocal microscope of brain tissue sections through the hippocampus processed for triple immunofluorescence to localize the human-specific synaptophysin (hSyn, the presynaptic protein in graft-derived neurons), postsynaptic density protein-95 (PSD-95), and microtubule-associated protein-2 (MAP-2) in soma and dendrites of host neurons. Such analysis suggested the formation of putative synaptic contacts by graft-derived neurons on the dendrites of host CA1 pyramidal neurons in the stratum radiatum (Fig. 7g) and dentate granule cells in the molecular layer (Fig. 7l). Magnified views showing the possible contacts between the presynaptic component derived from graft-derived interneurons (h-Syn+ structures in green) and the host postsynaptic component (PSD95+ structures in blue) on the dendrites of CA1 pyramidal neurons and dentate granule cells (in red) are illustrated (Fig. 7hk, mp). In addition, hSyn+ structures were also seen on the soma of dentate granule cells. Thus, transplanted GABA-ergic interneurons appeared to have integrated synaptically with the host neurons in the dentate gyrus and the CA1 subfield. Such synaptic connectivity likely explains the control of seizures and object location memory task by transplant-derived GABA-ergic interneurons.

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A 5th person is likely cured of HIV, and another is in long-term remission – NBC News

Two new cases presented Wednesday at the International AIDS Conference in Montreal have advanced the field of HIV cure science, demonstrating yet again that ridding the body of all copies of viable virus is indeed possible, and that prompting lasting viral remission also might be attainable.

In one case, scientists reported that a 66-year-old American man with HIV has possibly been cured of the virus through a stem cell transplant to treat blood cancer. The approach which has demonstrated success or apparent success in four other cases uses stem cells from a donor with a specific rare genetic abnormality that gives rise to immune cells naturally resistant to the virus.

In another case, Spanish researchers determined that a woman who received an immune-boosting regimen in 2006 is in a state of what they characterize as viral remission, meaning she still harbors viable HIV but her immune system has controlled the viruss replication for over 15 years.

Experts stress, however, that it is not ethical to attempt to cure HIV through a stem cell transplant a highly toxic and potentially fatal treatment in anyone who is not already facing a potentially fatal blood cancer or other health condition that would make them a candidate for such a treatment.

While a transplant is not an option for most people with HIV, these cases are still interesting, still inspiring and illuminate the search for a cure, Dr. Sharon Lewin, an infectious disease specialist at the Peter Doherty Institute for Infection and Immunity at the University of Melbourne, told reporters on a call last week ahead of the conference.

There are also no guarantees of success through the stem cell transplant method. Researchers have failed to cure HIV using this approach in a slew of other people with the virus.

Nor is it clear that the immune-enhancing approach used in the Spanish patient will work in additional people with HIV. The scientists involved in that case told NBC News that much more research is needed to understand why the therapy appears to have worked so well in the woman it failed in all participants in the clinical trial but her and how to identify others in whom it might have a similar impact. They are trying to determine, for example, if specific facets of her genetics might favor a viral remission from the treatment and whether they could identify such a genetic profile in other people.

The ultimate goal of the HIV cure research field is to develop safe, effective, tolerable and, importantly, scalable therapies that could be made available to wide swaths of the global HIV population of some 38 million people. Experts in the field tend to think in terms of decades rather than years when hoping to achieve such a goal against a foe as complex as this virus.

Diagnosed with HIV in 1988, the man who received the stem cell transplant is both the oldest person to date 63 years old at the time of the treatment and the one living with HIV for the longest to achieve an apparent success from a stem cell transplant cure treatment.

The white male dubbed the City of Hope patient after the Los Angeles cancer center where he received his transplant 3years ago has been off of antiretroviral treatment for HIV for 17 months.

We monitored him very closely, and to date we cannot find any evidence of HIV replicating in his system, said Dr. Jana Dickter, an associate clinical professor in the Division of Infectious Diseases at City of Hope. Dickter is on the patients treatment team and presented his case at this weeks conference.

This means the man has experienced no viral rebound. And even through ultra-sensitive tests, including biopsies of the mans intestines, researchers couldnt find any signs of viable virus.

The man was at one time diagnosed with AIDS, meaning his immune system was critically suppressed. After taking some of the early antiretroviral therapies, such as AZT, that were once prescribed as individual agents and failed to treat HIV effectively, the man started a highly effective combination antiretroviral treatment in the 1990s.

In 2018, the man was diagnosed with acute myeloid leukemia, or AML. Even when HIV is well treated, people with the virus are still at greater risk of a host of cancers that are associated with aging, including AML and other blood cancers. Thanks to effective HIV treatment, the population of people living with the virus in the U.S. is steadily aging; the majority of people diagnosed with HIV is now older than 50.

He was treated with chemotherapy to send his leukemia into remission prior to his transplant. Because of his older age, he received a reduced intensity chemotherapy to prepare him for his stem cell transplant a modified therapy that older people with blood cancers are better able to tolerate and that reduces the potential for transplant-related complications.

Next, the man received the stem cell transplant from the donor with an HIV-resistant genetic abnormality. This abnormality is seen largely among people with northern European ancestry, occurring at a rate of about 1% among those native to the region.

According to Dr. Joseph Alvarnas, a City of Hope hematologist and a co-author of the report, the new immune system from the donor gradually overtook the old one a typical phenomenon.

Some two years after the stem cell transplant, the man and his physicians decided to interrupt his antiretroviral treatment. He has remained apparently viable-virus free ever since. Nevertheless, the study authors intend to monitor him for longer and to conduct further tests before they are ready to declare that he is definitely cured.

A second report presented at the Montreal conference detailed the case of a 59-year-old woman in Spain who is considered to be in a state of viral remission.

The woman was enrolled in a clinical trial in Barcelona in 2006 of people receiving standard antiretroviral treatment. She was randomized to also receive 11 months of four therapies meant to prime the immune system to better fight the virus, according to Nria Climent, a biologist at the University of Barcelona Hospital Clinic, who presented the findings.

Then Climent and the research team decided to take the woman off her antiretrovirals, per the studys planned protocol. She has now maintained a fully suppressed viral load for over 15 years. Unlike the handful of people either cured or possibly cured by stem cell transplants, however, she still harbors virus that is capable of producing viable new copies of itself.

Her body has actually controlled the virus more efficiently with the passing years, according to Dr. Juan Ambrosioni, an HIV physician in the Barcelona clinic.

Ambrosioni, Climent and their collaborators said they waited so long to present this womans case because it wasnt until more recently that technological advances have allowed them to peer deeply into her immune system and determine how it is controlling HIV on its own.

Its great to have such a gaze, Ambrosioni said, noting that the point is to understand what is going on and to see if this can be replicated in other people.

In particular, it appears that what are known as her memory-like NK cells and CD8 gamma-delta T cells are leading this effective immunological army.

The research team noted that they do not believe that the woman would have controlled HIV on her own without the immune-boosting treatment, because the mechanisms by which her immune cells appear to control HIV are different from those seen in elite controllers, the approximately 1 in 200 people with HIV whose immune systems can greatly suppress the virus without treatment.

Lewin, of Australias Peter Doherty Institute, told reporters last week that it is still difficult to judge whether the immune-boosting treatment the woman received actually caused her state of remission. Much more research is needed to answer that question and to determine if others might also benefit from the therapy she received, she said.

Over four decades, just five people have been cured or possibly cured of HIV.

The virus remains so vexingly difficult to cure because shortly after entering the body it infects types of long-lived immune cells that enter a resting, or latent, state. Because antiretroviral treatment only attacks HIV when infected cells are actively churning out new viral copies, these resting cells, which are known collectively as the viral reservoir and can stay latent for years, remain under the radar of standard treatment. These cells can return to an active state at any time. So if antiretrovirals are interrupted, they can quickly repopulate the body with virus.

The first person cured of HIV was the American Timothy Ray Brown, who, like the City of Hope patient, was diagnosed with AML. His case was announced in 2008 and then published in 2009. Two subsequent cases were announced at a conference in 2019, known as the Dsseldorf and London patients, who had AML and Hodgkin lymphoma, respectively. The London patient, Adam Castillejo, went public in 2020.

Compared with the City of Hope patient, Brown nearly died after the two rounds of full-dose chemotherapy and the full-body radiation he received. Both he and Castillejo had a devastating inflammatory reaction to their treatment called graft-versus-host disease.

Dr. Bjrn Jensen, of Dsseldorf University Hospital, the author of the German case study one typically overlooked by HIV cure researchers and in media reports about cure science said that with 44 months passed since his patient has been viral rebound-free and off of antiretrovirals, the man is almost definitely cured.

We are very confident there will be no rebound of HIV in the future, said Jensen, who noted that he is in the process of getting the case study published in a peer-reviewed journal.

For the first time, University of Cambridges Ravindra Gupta, the author of the London case studystated, in an email to NBC News, that with nearly five years passed since Castillejo has been off of HIV treatment with no viral rebound, he is definitely cured.

In February, a research team announced the first case of a woman and the first in a person of mixed race possibly being cured of the virus through a stem cell transplant. The case of this woman, who had leukemia and is known as the New York patient, represented a substantial advance in the HIV cure field because she was treated with a cutting-edge technique that uses an additional transplant of umbilical cord blood prior to providing the transplant of adult stem cells.

The combination of the two transplants, the study authors told NBC News in February, helps compensate for both the adult and infant donors being less of a close genetic match with the recipient. Whats more, the infant donor pool is much easier than the adult pool to scan for the key HIV-resistance genetic abnormality. These factors, the authors of the womans case study said, likely expand the potential number of people with HIV who would qualify for this treatment to about 50 per year

Asked about the New York patients health status, Dr. Koen van Besien, of the stem cell transplant program at Weill Cornell Medicine and New York-Presbyterian in New York City, said, She continues to do well without detectable HIV.

Over the past two years, investigators have announced the cases of two women who are elite controllers of HIV and who have vanquished the virus entirely through natural immunity. They are considered likely cured.

Scientists have also reported several cases over the past decade of people who began antiretroviral treatment very soon after contracting HIV and after later discontinuing the medications have remained in a state of viral remission for years without experiencing viral rebound.

Speaking of the reaction of the City of Hope patient, who prefers to remain anonymous, to his new HIV status, Dickter said: Hes thrilled. Hes really excited to be in that situation where he doesnt have to take these medications. This has just been life-changing.

The man has lived through several dramatically different eras of the HIV epidemic, she noted.

In the early days of HIV, he saw many of his friends and loved ones get sick and ultimately die from the disease, Dickter said. He also experienced so much stigma at that time.

As for her own feelings about the case, Dickter said, As an infectious disease doctor, Id always hoped to be able to tell my HIV patients that theres no evidence of virus remaining in their system.

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A 5th person is likely cured of HIV, and another is in long-term remission - NBC News

A new era: After winding path and safety scares, gene therapy enters the clinic – Sydney Morning Herald

What weve dreamed about for several decades now is becoming reality, says Professor Ian Alexander, head of the gene therapy research unit at the Childrens Medical Research Institute. We are about to see a big rush of these therapies coming into the clinic. Its really started screaming upwards in the last few years its exponential.

We stand on the very tip of the iceberg. The first gene therapy was approved in China in 2004; over the next 10 years, global regulators approved just four more. In just the past 18 months, regulators have approved five treatments with two more awaiting final approval and another 3633 therapies in the pipeline, according to tracking by the American Society of Gene and Cell Therapy.

Were at the stage where there is a huge bulge coming down the clinical trial pipeline. Its almost exceeding capacity, says Dr Thomas Edwards, head of retinal gene therapy research at the Centre for Eye Research Australia. Its an exciting time for patients, it wasnt long ago we had nothing for them.

Many of the drugs we have, such as penicillin or Tamiflu, work by killing bacteria or viruses. Vaccination uses a dead virus to prime the immune system. Synthetic hormones like insulin treat the bodys own shortages. Chemicals in pill form, such as selective serotonin reuptake inhibitors, float through the bloodstream, enter our cells and change our chemistry.

Gene therapy is different. Rather than alter our chemistry, it treats us by changing our genotype, the way our DNA is expressed.

It is a new paradigm. It offers the first possibility of curing diseases at their root genetic cause and the possibility of a lifelong cure, says Rasko. And we are seeing that now in patients.

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Understanding Zolgensma gives you an idea of how different this new medical era will be.

Every time you go to scroll an article or turn the page in a newspaper, your brain converts that thought to a signal. It runs down your spinal cord to motor neurons, cells that reside in the cord but project thin tendrils out into the flesh. These tendrils called axons carry commands from neuron to muscle.

Like every cell in your body, each motor neuron carries a full copy of your genome, separated across 23 pairs of chromosomes and locked tight in the cells nucleus.

On chromosome five is a short stretch of genetic code known as SMN1. This gene is a blueprint for a protein crucial to the motor neurons function.

SMN1 is in an unfortunate place. The stretch of chromosome it lies in is prone to errors. Make a coding error in SMN1 and you blur the blueprint. The motor neurons struggle to build their crucial protein and soon start dying.

Without motor neurons, the signals from the brain to eat, to move, even to breathe stop getting through. In about 1 in every 10,000 babies born in Australia every year, this gene has an error.

Zolgensma, marketed by Novartis, comes in a small syringe, just 50 milliltres. Inside the syringe, in fluid, is a genetically-modified adeno-associated virus, the organic machines that make the treatment possible.

As far as science can tell, AAVs are harmless to humans. They infect us without us ever knowing. Scientists slice out the part of the viruss genetic code and replace it with a copy of SMN1. Inside the body, it crosses from the blood to the spinal cord and quickly infects motor neuron cells. Its the perfect vehicle, says Associate Professor Michelle Farrar, a paediatric neurologist who led a clinical trial of the drug at Sydney Childrens Hospitals Network.

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The virus enters the nucleus the vault where DNA is kept and releases its copy of the SMN1 gene. Unlike Gattaca-style genetic editing, the new gene is not incorporated into the patients DNA but floats nearby. Extra genetic code attached to the gene instructs the cell to activate it and start churning out copies of the key protein the motor neurons need.

Unlike most cells in the body, motor neurons dont divide; youre born with all you have. This is why losing them is so dangerous but it also means that if you can repair the faulty gene, you should have a therapy that works long-term. Some patients are now eight years post-treatment with no sign its wearing off, says Farrar.

Zolgensma does come with risks: serious liver injury or failure. Two patients on one of the drugs key clinical trials had signs of liver damage; a third had swelling on the brain requiring surgery.

Indeed, liver damage remains a problem with many gene treatments, with multiple deaths reported in clinical trials.

It remains unclear why. But the therapies rely on treating one disease by essentially infecting a patient with a benign virus, and when you put something in the blood a lot of it is going to end filtered out by the liver. One theory: in some people the immune system might spot and attack the build-up of virus in the liver, leading to extreme systemic inflammation and death.

Safety concerns have dogged gene therapy ever since the death of Jesse Gelsinger the young man who, in 1999, became the face of the treatments limitations after he died while participating in a clinical trial.

His death was a very sobering experience for the field, says Alexander from the Childrens Medical Research Institute a sign that scientists understood far less than they thought. There was a mismatch between the technology and the understanding.

Rasko is tougher on his colleagues. In 1999, when Jesse passed, essentially the whole field stunk. Everyone was accused of overhyping, and no one was delivering.

In response, the field curtailed its ambition and pivoted toward diseases that are a better match for the quickly developing technology.

Early treatments were held up because of the struggle to deliver enough of the gene without provoking a huge immune response. By switching to adeno-associated viruses small viruses that infect humans and some other primate species scientists found they could deliver more genetic code while reducing the immune response. And the field started hunting for conditions that seemed a better match for gene therapy.

Zolgensma and Spark Therapeutics Luxturna, approved for government subsidy in March, both use the same adeno-associated virus to target cells that are easy to access and do not divide.

Luxturna treats a genetic cause of blindness by supplying a replacement copy of a defective gene to cells in the retina, allowing them to make a protein crucial for sight.

The gene is small and easy to package in the virus. And the eye, you can get at it relatively easy surgically, says Eye Research Australias Edwards. And [the retina] has immune-privilege the virus does not cause a widespread immune reaction.

Both Zolgensma and Luxturna are extraordinarily expensive, raising the question of whether gene therapy will be a medicine of the rich. Experts are hopeful that wont be the case.

Some of the early therapies will be for small groups, but eventually a gene therapy that can be used by many people will come online, says Professor Robyn Jamieson, head of the eye genetics research unit at the Childrens Medical Research Institute. Those economies of scale will push the price down for everyone.

And now the technology has been proven to work, competition among biotechs to develop new therapies is fierce. They are jaw-droppingly expensive now, says Rasko, but over time that competition should pull costs down.

And new facilities to make the viral machines at the heart of the treatment will also come online. This year NSW invested $25 million in a pilot factory to make viral vectors in Westmead.

None of this can come quickly enough for the hundreds of thousands of families across Australia living with genetic illnesses.

Shes very stubborn, very strong-willed, Adriana Baron says of her daughter, Mariana. And that helped her.Credit:Simon Schluter

To get Mariana the treatment she needed, Adriana had to battle first to get a diagnosis, then get approved for the treatment, and then get government funding to bring it into the country. But shes a fighter, just like her daughter.

Shes very stubborn, very strong-willed. And that helped her, says Adriana. If she wants to do things on her own, she tells you, I dont need any help, she does it herself.

Liam Mannixs Examine newsletter explains and analyses science with a rigorous focus on the evidence. Sign up to get it each week.

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A new era: After winding path and safety scares, gene therapy enters the clinic - Sydney Morning Herald