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Can science save the last two white rhinos left on the planet? – RFI

Issued on: 04/03/2020 - 16:32Modified: 04/03/2020 - 16:33

Northern white rhinos no longer exist in the wild. The last two remaining female individuals are under constant surveillance in Kenya while scientists are working on groundbreaking techniques to save the species from complete extinction.

Najin and her daughter Fatu are under intense surveillance in their 700-acre (about 280-hectare) enclosure at the Ol Pejeta conservancy near the town of Nanyuki, on the equator in central Kenya. Their head caregiver, Zacharia Mutai, says his team considers them as family members.

We know them very well and must ensure that they are healthy and well looked after.

Having the last two is something very serious. We are trying all our best to protect and preserve them. We dont want to face extinction any more.

Mutai was the caregiver of Sudan, the last male northern white rhino, which died in 2018.

The two remaining females, 31-year-old Najin and 20-year-old Fatu, are clinically infertile and cannot carry a pregnancy. Furthermore, Najin has a large tumour on her right ovary and Fatin has a damaged uterus.

Groundbreaking techniques

In order to save the species from extinction, scientists are working on artificial reproduction techniques which have never been attempted with rhinoceros before.

The efforts are pioneered by the BioRescue project at the Leibniz Institute for Zoo and Wildlife Research (Leibniz-IZW) in Germany. The team of international scientists are using in vitro fertilisation (IVF) and stem cell technology for reproduction purposes.

We have collected a lot of semen from four different northern white rhino bulls over the last 20 years, says Professor Thomas Hildebrandt who heads the BioRescue project.

This frozen semen allows us to do in vitro fertilisation and we hope to combine that approach together with groundbreaking stem cell technology.

Hildebrandt, a veterinarian specialised in the reproduction of wild animals, hopes that the combined technology will help produce a viable population that could be released into the wild within 15 to 20 years.

Last year, in a unique procedure at the Ol Pejeta conservancy, his team managed to collect the eggs from Fatu and Najin, but only three embryos from Fatus eggs have managed to survive.

Our goal is to produce the first offspring of the northern white rhino with IVF technique as soon as possible so that this baby can learn how to be a northern white rhino from Najin and Fatu.

So, our timeline for that is about three years from now, he added.

The embryos are ready for transfer into surrogate southern white rhinos mothers. Hildebrandt hopes that it will happen before the end of 2020. It will then be followed by a gestation period of 16 months.

Meanwhile in Kenya, Stephen Ngulu, the wildlife vet at the Ol Pejeta conservancy, told RFI that Najin and Fatu are scrupulously monitored.

I have to observe their walking, their skin, check the eyes, teeth, feet or any wounds. I collect blood and we will test for various parasites, bacterial and viral diseases.

Stem cell technology to save endangered species

The stem cell approach is needed because we need a gene pool large enough to create a solid, viable population of northern white rhinoceros, said Hildebrandt, who has spent the last 20 years working with the northern white rhinos.

The technique, inspired by the work of the 2012 Nobel Prize-winning stem cell biologist Shinya Yamanaka, has only been performed on lab mice, but nobody has been capable, so far, to do that with two-ton species like the rhino.

The scientists are using stem cell technology to create eggs and sperm from deceased northern white rhinos.

We have not only harvested sperms from the four different northern white rhino bulls but we also collected skin samples from 12 unrelated individuals.

We have the best scientists on board and we hope to make significant progress in this field in the next three to five years, Hildebrandt told RFI.

It is very ambitious, but without dreams you cant change the world.

24/7 armed surveillance

The northern white rhino is endemic to swamp areas extending over Uganda, Sudan, Democratic Republic of Congo, Central African Republic and Chad.

Extensive poaching and civil war led to their near extinction. Najin and Fatu were born in captivity and brought to Kenya in 2009 from the Dvur Kralove Safari Park in the Czech Republic.

The worlds two remaining northern white rhinos live under the constant surveillance of 42 armed guards from the National Police Reservists.

We have a system where we can track the walkie talkies of the patrols. We have night vision, we have thermal images, explains Emilio Gichuki at the Ol Pejeta conservancy.

He added that poaching is still an acute problem which they are trying to resolve by involving the neighbouring communities.

Follow BioRescue project on Twitter @BioRescueP

Follow Leibniz Institute for Zoo and Wildlife Research on Twitter @IZWberlin

Follow Ol Pejeta conservancy on Twitter @OlPejeta

Follow Zeenat Hansrod on Twitter @zxnt

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Can science save the last two white rhinos left on the planet? - RFI

2020 Hematopoietic Stem Cell Transplantation Market Report- Size Analysis, Growth Opportunities, Trends, Forecast and Outlook 2025 – Monroe Scoop

ReportsnReports added a new report on The Hematopoietic Stem Cell Transplantation Market report that delivers the clean elaborated structure of the Report comprising each and every business-related information of the market at a global level. The in-depth study on the current state which focuses on the major drivers and restraints for the key players. Hematopoietic Stem Cell Transplantation Market Industry research report provides granular analysis of the market share, segmentation, revenue forecasts, geographic regions of the market and analytical tools such as SWOT analysis to generate a whole set of trade based studies regarding the Hematopoietic Stem Cell Transplantation Market.

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Hematopoietic Stem Cell Transplantation Market Report provides an overview of Hematopoietic Stem Cell Transplantation Clinical trials scenario. This report provides top line data relating to the clinical trials on Hematopoietic Stem Cell Transplantation. Report includes an overview of trial numbers and their average enrollment in top countries conducted across the globe. The report offers coverage of disease clinical trials by region, country (G7 & E7), phase, trial status, end points status and sponsor type. Report also provides prominent drugs for in-progress trials (based on number of ongoing trials). GlobalData Clinical Trial Reports are generated using GlobalDatas proprietary database Pharma eTrack Clinical trials database. Clinical trials are collated from 80+ different clinical trial registries, conferences, journals, news etc across the globe. Clinical trials database undergoes periodic update by dynamic process.

Scope of this Report- The report provides a snapshot of the global clinical trials landscape Report provides top level data related to the clinical trials by Region, Country (G7 & E7), Trial Status, Trial Phase, Sponsor Type and End point status The report reviews top companies involved and enlists all trials (Trial title, Phase, and Status) pertaining to the company The report provides all the unaccomplished trials (Terminated, Suspended and Withdrawn) with reason for unaccomplishment The Report provides enrollment trends for the past five years Report provides latest news for the past three months

Reasons to Buy this Report- Assists in formulating key business strategies with regards to investment Helps in identifying prominent locations for conducting clinical trials which saves time and cost Provides top level analysis of Global Clinical Trials Market which helps in identifying key business opportunities Supports understanding of trials count and enrollment trends by country in global therapeutics market Aids in interpreting the success rates of clinical trials by providing a comparative scenario of completed and uncompleted (terminated, suspended or withdrawn) trials Facilitates clinical trial assessment of the indication on a global, regional and country level

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Table of Contents in this Report-List of TablesList of FiguresReport GuidanceClinical Trials Report CoverageClinical Trials by RegionClinical Trials and Average Enrollment by CountryTop Five Countries Contributing to Clinical Trials in Asia-PacificTop Five Countries Contributing to Clinical Trials in EuropeTop Countries Contributing to Clinical Trials in North AmericaTop Countries Contributing to Clinical Trials in Middle East and AfricaTop Countries Contributing to Clinical Trials in Central and South AmericaClinical Trials by G7 Countries: Proportion of Hematopoietic Stem Cell Transplantation to Immunology Clinical TrialsClinical Trials by Phase in G7 CountriesClinical Trials in G7 Countries by Trial StatusClinical Trials by E7 Countries: Proportion of Hematopoietic Stem Cell Transplantation to Immunology Clinical TrialsClinical Trials by Phase in E7 CountriesClinical Trials in E7 Countries by Trial StatusClinical Trials by PhaseIn Progress Trials by PhaseClinical Trials by Trial StatusClinical Trials by End Point StatusSubjects Recruited Over a Period of TimeClinical Trials by Sponsor TypeProminent SponsorsTop Companies Participating in Hematopoietic Stem Cell Transplantation Therapeutics Clinical TrialsProminent DrugsLatest Clinical Trials News on Hematopoietic Stem Cell TransplantationNov 15, 2019: Gracell announces presentations on GC007G at the Annual Meeting of American Society of Hematology (ASH)Oct 17, 2019: Kiadis Pharma provides regulatory update on ATIR101Clinical Trial Profile SnapshotsAppendixAbbreviationsDefinitionsResearch MethodologySecondary Research

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2020 Hematopoietic Stem Cell Transplantation Market Report- Size Analysis, Growth Opportunities, Trends, Forecast and Outlook 2025 - Monroe Scoop

Global Stem Cell and Platelet Rich Plasma (PRP) Alopecia Therapies Market Recent Study Including Business Growth, Development Factors and Growth…

In its recently added report by MRInsights.biz with the title Global Stem Cell and Platelet Rich Plasma (PRP) Alopecia Therapies Market has provided a comprehensive analysis of the market structure which includes unique insights about the market for the given period. The report covers the competitive landscape and the conspicuous market players anticipated to lead the global Stem Cell and Platelet Rich Plasma (PRP) Alopecia Therapies market for the forecast period, 2019-2024. One of the main targets of this report is to classify the various dynamics of the market. The forenamed market is greatly transforming because of the moves of the key players and brands including developments, product launches, joint ventures, mergers and acquisitions that in turn change the view of the global face of the industry.

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The drivers and restraints are intrinsic factors while opportunities and challenges are extrinsic factors of the market. The research report is based on the integration, analysis, and interpretation of information gathered regarding the target market from various sources. The report analysts have assessed information and data information and data acquired using a mix of primary and secondary research efforts. The global economic conditions and other economic indicators and factors are analyzed to look at their respective impact on the global Stem Cell and Platelet Rich Plasma (PRP) Alopecia Therapiesmarket historically, as well as the current impact that will help to make informed forecasts about the scenarios in the future.

Market Insights of Competitive Landscape:

In the competition landscape section of the industry, our analysts provide an insight into the financial statements of all the major players along with its key developments product benchmarking and SWOT analysis. Company profiles cover the product offerings, key financial information, recent developments, SWOT analysis, and strategies employed by the major market players. Additionally, the market share of major players, along with the new projects and strategies adopted by players in the past five years (2014-2020) are also included.

List of some major players from a wide list of coverage used under the bottom-up approach is: Orange County Hair Restoration Center, Colorado Surgical Center & Hair Institute, Evolution Hair Loss Institute, Hair Sciences Center of Colorado, Hair Transplant Institute of Miami, Anderson Center for Hair, Virginia Surgical Center, Savola Aesthetic Dermatology Center,

The research provides information on opportunities available in the market. In terms of region, the market covers:

North America (United States, Canada and Mexico)

Europe (Germany, France, UK, Russia and Italy)

Asia-Pacific (China, Japan, Korea, India and Southeast Asia)

South America (Brazil, Argentina, Colombia)

Middle East and Africa (Saudi Arabia, UAE, Egypt, Nigeria and South Africa)

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Moreover, the report covers the ongoing as well as forecast trends likely to fuel the business graph of the global Stem Cell and Platelet Rich Plasma (PRP) Alopecia Therapiesmarket. Further, the report introduces a new project SWOT analysis, investment feasibility analysis, and investment return analysis. An overview of each market segment such as product type, application, end-users, and region are offered in the report. A comparative study between conventional and emerging technologies and the importance of technical developments in this market has been offered.

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Global Stem Cell and Platelet Rich Plasma (PRP) Alopecia Therapies Market Recent Study Including Business Growth, Development Factors and Growth...

Canine Stem Cell Therapy Market: Future Scenarios and Business Opportunity Analysis 2027 – Jewish Life News

The research study presented in this report offers complete and intelligent analysis of the competition, segmentation, dynamics, and geographical advancement of the Global Canine Stem Cell Therapy Market. The research study has been prepared with the use of in-depth qualitative and quantitative analyses of the global Canine Stem Cell Therapy market. We have also provided absolute dollar opportunity and other types of market analysis on the global Canine Stem Cell Therapy market.

It takes into account the CAGR, value, volume, revenue, production, consumption, sales, manufacturing cost, prices, and other key factors related to the global Canine Stem Cell Therapy market. All findings and data on the global Canine Stem Cell Therapy market provided in the report are calculated, gathered, and verified using advanced and reliable primary and secondary research sources. The regional analysis offered in the report will help you to identify key opportunities of the global Canine Stem Cell Therapy market available in different regions and countries.

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The authors of the report have segmented the global Canine Stem Cell Therapy market as per product, application, and region. Segments of the global Canine Stem Cell Therapy market are analyzed on the basis of market share, production, consumption, revenue, CAGR, market size, and more factors. The analysts have profiled leading players of the global Canine Stem Cell Therapy market, keeping in view their recent developments, market share, sales, revenue, areas covered, product portfolios, and other aspects.

Market Taxonomy

The global canine stem cell therapy market has been segmented into:

Product Type:

Application:

End User:

Region:

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Canine Stem Cell Therapy Market Size and Forecast

In terms of region, this research report covers almost all the major regions across the globe such as North America, Europe, South America, the Middle East, and Africa and the Asia Pacific. Europe and North America regions are anticipated to show an upward growth in the years to come. While Canine Stem Cell Therapy Market in Asia Pacific regions is likely to show remarkable growth during the forecasted period. Cutting edge technology and innovations are the most important traits of the North America region and thats the reason most of the time the US dominates the global markets. Canine Stem Cell Therapy Market in South, America region is also expected to grow in near future.

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Canine Stem Cell Therapy Market: Future Scenarios and Business Opportunity Analysis 2027 - Jewish Life News

Little Tissue, Big Mission: Beating Heart Tissues to Ride Aboard The ISS – Newswise

Newswise Launching no earlier than March 6 at 11:50 PM EST, the Johns Hopkins University will send heart muscle tissues, contained in a specially-designed tissue chip the size of a small cellphone, up to the microgravity environment of the International Space Station (ISS) for one month of observation.

The project, led by Deok-Ho Kim, an Associate Professor of Biomedical Engineering and Medicine at The Johns Hopkins University and the projects principal investigator, will hopefully shed light on the aging process and adult heart health, and facilitate the development of treatments for heart muscle diseases.

Scientists already know that humans exposed to space experience changes similar to accelerated aging, so we hope the results can help us better understand and someday counteract the aging process, says Kim.

The researchers also hope the study will demystify why astronauts in space have reduced heart function and are more prone to serious irregular heartbeat; these results could help protect astronauts hearts on long missions in the future, as well as provide information on how to combat heart disease.

Kim and his team used human induced pluripotent stem cells to grow cardiomyocytes, or heart muscle cells, in a bioengineered, miniaturized tissue chip that mimics the function of the adult human heart. While other researchers have studied stem cell-derived heart muscle cells in space before, these studies relied on cells cultured on 2D surfaces, or flat planes, that arent representative of how cells exist and behave in the body, and are therefore underdeveloped compared to their counterparts in adult humans.

The teams tissue platform gives the advantage of the cells residing in a 3D environment, which will allow for better imitation of how cell signals and actions develop as they would in the human body. This 3D environment is possible thanks to a new scaffold biomaterial, or support structure which holds the tissues together, that accelerates development of the heart muscle cells within. This will allow the scientists to collect data useful for understanding the adult human body. Scientists could someday use this data and platform to develop new drugs, among many other applications.

Using a motion sensor magnet setup, the team will receive real-time measurements of how the tissues on the ISS beat. After about one month in space, the tissues will return to Earth and will be analyzed for any differences in gene expression and contraction caused by the extended stay in microgravity. Some of these tissues will be cultured for an additional week on Earth for the researchers to examine any recovery effects. The team will also have identical heart tissues on Earth at the University of Washington to serve as controls.

We hope that this project will give us meaningful data that we can use to understand the hearts structure and how it functions, so that we can improve the health of both astronauts and those down here on Earth, says Kim.

"The entire team is excited to see the results we get from this experiment. If successful, we will embark on the second phase of the study where tissues will be sent up to the ISS once again in two years, but this time, we will be able to test a variety of drugs to see which ones will best ameliorate the potentially harmful effects of microgravity on cardiac function," says Jonathan Tsui, a postdoctoral fellow in the Department of Biomedical Engineering at The Johns Hopkins University and a member of Kims lab.

This project is funded by the National Center for Advancing Translational Sciences (NCATS) and the National Institute of Biomedical Imaging and Bioengineering (NIBIB) as part of the Tissue Chips in Space initiative in collaboration with the ISS U.S. National Laboratory.

Collaborators on this project include Eun Hyun Ahn of The Johns Hopkins University; Nathan Sniadecki and Alec Smith of The University of Washington; Peter Lee of Ohio State University; and Stefanie Countryman of Bioserve Space Technologies at the University of Colorado Boulder. For space flight the team has worked with BioServe Space Technologies to translate the ground platform into a space flight certified system.

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Little Tissue, Big Mission: Beating Heart Tissues to Ride Aboard The ISS - Newswise

Biochemical and structural cues of 3D-printed matrix synergistically direct MSC differentiation for functional sweat gland regeneration – Science…

Abstract

Mesenchymal stem cells (MSCs) encapsulation by three-dimensionally (3D) printed matrices were believed to provide a biomimetic microenvironment to drive differentiation into tissue-specific progeny, which made them a great therapeutic potential for regenerative medicine. Despite this potential, the underlying mechanisms of controlling cell fate in 3D microenvironments remained relatively unexplored. Here, we bioprinted a sweat gland (SG)like matrix to direct the conversion of MSC into functional SGs and facilitated SGs recovery in mice. By extracellular matrix differential protein expression analysis, we identified that CTHRC1 was a critical biochemical regulator for SG specification. Our findings showed that Hmox1 could respond to the 3D structure activation and also be involved in MSC differentiation. Using inhibition and activation assay, CTHRC1 and Hmox1 synergistically boosted SG gene expression profile. Together, these findings indicated that biochemical and structural cues served as two critical impacts of 3D-printed matrix on MSC fate decision into the glandular lineage and functional SG recovery.

Mesenchymal stem cells (MSCs) hold great promise for therapeutic tissue engineering and regenerative medicine, largely because of their capacity for self-renewal and multipotent properties (1). However, their uncertain fate has a major impact on their envisioned therapeutic use. Cell fate regulation requires specific transcription programs in response to environmental cues (2, 3). Once stem cells are removed from their microenvironment, their response to environmental cues, phenotype, and functionality could often be altered (4, 5). In contrast to growing information concerning transcriptional regulation, guidance from the extracellular matrix (ECM) governing MSC identity and fate determination is not well understood. It remains an active area of investigation and may provide previously unidentified avenues for MSC-based therapy.

Over the past decade, engineering three-dimensional (3D) ECM to direct MSC differentiation has demonstrated great potential of MSCs in regenerative medicine (6). 3D ECM has been found to be useful in providing both biochemical and biophysical cues and to stabilize newly formed tissues (7). Culturing cells in 3D ECM radically alters the interfacial interactions with the ECM as compared with 2D ECM, where cells are flattened and may lose their differentiated phenotype (8). However, one limitation of 3D materials as compared to 2D approaches was the lack of spatial control over chemistry with 3D materials. One possible solution to this limitation is 3D bioprinting, which could be used to design the custom scaffolds and tissues (9).

In contrast to traditional engineering techniques, 3D cell printing technology is especially advantageous because it can integrate multiple biophysical and biochemical cues spatially for cellular regulation and ensure complex structures with precise control and high reproducibility. In particular, for our final goal of clinical practice, extrusion-based bioprinting may be more appropriate for translational application. In addition, as a widely used bioink for extrusion bioprinting, alginate-based hydrogel could maintain stemness of MSC due to the bioinert property and improve biological activity and printability by combining gelatin (10).

Sweat glands (SGs) play a vital role in thermal regulation, and absent or malfunctioning SGs in a hot environment can lead to hyperthermia, stroke, and even death in mammals (11, 12). Each SG is a single tube consisting of a functionally distinctive duct and secretory portions. It has low regenerative potential in response to deep dermal injury, which poses a challenge for restitution of lost cells after wound (13). A major obstacle in SG regeneration, similar to the regeneration of most other glandular tissues, is the paucity of viable cells capable of regenerating multiple tissue phenotypes (12). Several reports have described SG regeneration in vitro; however, dynamic morphogenesis was not identified nor was the overall function of the formed tissues explored (1416). Recent advances in bioprinting and tissue engineering led to the complexities in the matrix design and fabrication with appropriate biochemical cues and biophysical guidance for SG regeneration (1719).

Here, we adopted 3D bioprinting technique to mimic the regenerative microenvironment that directed the specific SG differentiation of MSCs and ultimately guided the formation and function of glandular tissue. We used alginate/gelatin hydrogel as bioinks in this present study due to its good cytocompatibility, printability, and structural maintenance in long-time culture. Although the profound effects of ECM on cell differentiation was well recognized, the importance of biochemical and structural cues of 3D-printed matrix that determined the cell fate of MSCs remained unknown; thus, the present study demonstrated the role of 3D-printed matrix cues on cellular behavior and tissue morphogenesis and might help in developing strategies for MSC-based tissue regeneration or directing stem cell lineage specification by 3D bioprinting.

The procedure for printing the 3D MSC-loaded construct incorporating a specific SG ECM (mouse plantar region dermis, PD) was shown schematically in Fig. 1A. A 3D cellular construct with cross section 30 mm 30 mm and height of 3 mm was fabricated by using the optimized process parameter (20). The 3D construct demonstrated a macroporous grid structure with hydrogel fibers evenly distributed according to the computer design. Both the width of the fibers and the gap between the fibers were homogeneous, and MSCs were embedded uniformly in the hydrogel matrix fibers to result in a specific 3D microenvironment. (Fig. 1B).

(A) Schematic description of the approach. (B) Full view of the cellular construct and representative microscopic and fluorescent images and the quantitative parameters of 3D-printed construct (scale bars, 200 m). Photo credit: Bin Yao, Wound Healing and Cell Biology Laboratory, Institute of Basic Medical Sciences, General Hospital of PLA. (C) Representative microscopy images of cell aggregates and tissue morphology at 3, 7, and 14 days of culture (scale bars, 50 m) and scanning electron microscopy (sem) images of 3D structure (scale bars, 20 m). PD+/PD, 3D construct with and without PD. (D) DNA contents, collagen, and GAGs of native tissue and PD. (E) Proliferating cells were detected through Ki67 stain at 3, 7, and 14 days of culture. (F) Live/dead assay show cell viability at days 3, 7, and 14. *P < 0.05.

During the maintenance of constructs for stem cell expansion, MSCs proliferated to form aggregates of cells but self-assembled to an SG-like structure only with PD administration (Fig. 1C and fig. S1, A to C). We carried out DNA quantification assay to evaluate the cellular content in PD and found the cellular matrix with up to 90% reduction, only 3.4 0.7 ng of DNA per milligram tissue remaining in the ECM. We also estimated the proportions of collagen and glycosaminoglycans (GAGs) in ECM through hydroxyproline assay and dimethylmethylene blue assay, the collagen contents could increase to 112.6 11.3%, and GAGs were well retained to 81 9.6% (Fig. 1D). Encapsulated cells were viable, with negligible cell death apparent during extrusion and ink gelation by ionic cross-linking, persisting through extended culture in excess of 14 days. The fluorescence intensity of Ki67 of MSCs cultured in 2D condition decreased from days 3 (152.7 13.4) to 14 (29.4 12.9), while maintaining higher intensity of MSCs in 3D construct (such as 211.8 19.4 of PD+3D group and 209.1 22.1 of PD3D group at day 14). And the cell viability in 3D construct was found to be sufficiently high (>80%) when examined on days 3, 7, and 14. The phenomenon of cell aggregate formation and increased cell proliferation implied the excellent cell compatibility of the hydrogel-based construct and promotion of tissue development of 3D architectural guides, which did not depend on the presence or absence of PD (Fig. 1, E and F).

The capability of 3D-printed construct with PD directing MSC to SGs in vitro was investigated. The 3D construct was dissolved, and cells were isolated at days 3, 7, and 14 for transcriptional analysis. Expression of the SG markers K8 and K18 was higher from the 3D construct with (3D/PD+) than without PD (3D/PD); K8 and K18 expression in the 3D/PD construct was similar to with control that MSCs cultured in 2D condition, which implied the key role of PD in SG specification. As compared with the 2D culture condition, 3D administration (PD+) up-regulated SG markers, which indicated that the 3D structure synergistically boosted the MSC differentiation (Fig. 2A).

(A) Transcriptional expression of K8, K18, Fxyd2, Aqp5, and ATP1a1 in 3D-bioprinted cells with and without PD in days 3, 7, and 14 culture by quantitative real-time polymerase chain reaction (qRT-PCR). Data are means SEM. (B) Comparison of SG-specific markers K8 and K18 in 3D-bioprinted cells with and without PD (K8 and K18, red; DAPI, blue; scale bars, 50 m). (C and D) Comparison of SG secretion-related markers ATP1a1 (C) and Ca2+ (D) in 3D-bioprinted cells with and without PD [ATP1a1 and Ca2+, red; 4,6-diamidino-2-phenylindole (DAPI), blue; scale bars, 50 m].

In addition, we tested secretion-related genes to evaluate the function of induced SG cells (iSGCs). Although levels of the ion channel factors of Fxyd2 and ATP1a1 were increased notably in 2D culture with PD and ATP1a1 up-regulated in the 3D/PD construct, all the secretory genes of Fxyd2, ATP1a1, and water transporter Aqp5 showed the highest expression level in the 3D/PD+ construct (Fig. 2A). Considering the remarkable impact, further analysis focused on 3D constructs.

Immunofluorescence staining confirmed the progression of MSC differentiation. At day 7, cells in the 3D/PD+ construct began to express K8 and K18, which was increased at day 14, whereas cells in the 3D/PD construct did not express K8 and K18 all the time (Fig. 2B and fig. S2A). However, the expression of ATP1a1 (ATPase Na+/K+ transporting subunit alpha 1) and free Ca2+ concentration did not differ between cells in the 3D/PD+ and 3D/PD constructs (Fig. 2, C and D). By placing MSCs in such a 3D environment, secretion might be stimulated by rapid cell aggregation without the need for SG lineage differentiation. Cell aggregationimproved secretion might be due to the benefit of cell-cell contact (fig. S2B) (21, 22).

To map the cell fate changes during the differentiation between MSCs and SG cells, we monitored the mRNA levels of epithelial markers such as E-cadherin, occludin, Id2, and Mgat3 and mesenchymal markers N-cadherin, vimentin, Twist1, and Zeb2. The cells transitioned from a mesenchymal status to a typical epithelial-like status accompanied by mesenchymal-epithelial transition (MET), then epithelial-mesenchymal transition (EMT) occurred during the further differentiation of epithelial lineages to SG cells (fig. S3A). In addition, MET-related genes were dynamically regulated during the SG differentiation of MSCs. For example, the mesenchymal markers N-cadherin and vimentin were down-regulated from days 1 to 7, which suggested cells losing their mesenchymal phenotype, then were gradually up-regulated from days 7 to 10 in their response to the SG phenotype and decreased at day 14. The epithelial markers E-cadherin and occludin showed an opposite expression pattern: up-regulated from days 1 to 5, then down-regulated from days 7 to 10 and up-regulated again at day 14. The mesenchymal transcriptional factors ZEB2 and Twist1 and epithelial transcriptional factors Id2 and Mgat3 were also dynamically regulated.

We further analyzed the expression of these genes at the protein level by immunofluorescence staining (figs. S3B and S4). N-cadherin was down-regulated from days 3 to 7 and reestablished at day 14, whereas E-cadherin level was increased from days 3 to 7 and down-regulated at day 14. Together, these results indicated that a sequential and dynamic MET-EMT process underlie the differentiation of MSCs to an SG phenotype, perhaps driving differentiation more efficiently (23). However, the occurrence of the MET-EMT process did not depend on the presence of PD. Thus, a 3D structural factor might also participate in the MSC-specific differentiation (fig. S3C).

To investigate the underlying mechanism of biochemical cues in lineage-specific cell fate, we used quantitative proteomics analysis to screen the ECM factors differentially expressed between PD and dorsal region dermis (DD) because mice had eccrine SGs exclusively present in the pads of their paws, and the trunk skin lacks SGs. In total, quantitative proteomics analyses showed higher expression levels of 291 proteins in PD than DD. Overall, 66 were ECM factors: 23 were significantly up-regulated (>2-fold change in expression). We initially determined the level of proteins with the most significant difference after removing keratins and fibrin: collagen triple helix repeat containing 1 (CTHRC1) and thrombospondin 1 (TSP1) (fig. S5). Western blotting was performed to further confirm the expression level of CTHRC1 and TSP1, and we then confirmed that immunofluorescence staining at different developmental stages in mice revealed increased expression of CTHRC1 in PD with SG development but only slight expression in DD at postnatal day 28, while TSP1 was continuously expressed in DD and PD during development (Fig. 3, A to C). Therefore, TSP1 was required for the lineage-specific function during the differentiation in mice but was not dispensable for SG development.

(A and B) Differential expression of CTHRC1 and TSP1in PD and back dermis (DD) ECM of mice by proteomics analysis (A) and Western blotting (B). (C) CTHRC1 and TSP1 expression in back and plantar skin of mice at different developmental times. (Cthrc1/TSP1, red; DAPI, blue; scale bars, 50 m).

According to previous results of the changes of SG markers, 3D structure and PD were both critical to SG fate. Then, we focused on elucidating the mechanisms that underlie the significant differences observed in 2D and 3D conditions with or without PD treatment. To this end, we performed transcriptomics analysis of MSCs, MSCs treated with PD, MSCs cultured in 3D construct, and MSC cultured in 3D construct with PD after 3-day treatment. We noted that the expression profiles of MSCs treated with 3D, PD, or 3D/PD were distinct from the profiles of MSCs (Fig. 4A). Through Gene Ontology (GO) enrichment analysis of differentially expressed genes, it was shown that PD treatment in 2D condition induced up-regulation of ECM and inflammatory response term, and the top GO term for MSCs in 3D construct was ECM organization and extracellular structure organization. However, for the MSCs with 3D/PD treatment, we found very significant overrepresentation of GO term related to branching morphogenesis of an epithelial tube and morphogenesis of a branching structure, which suggested that 3D structure cues and biochemical cues synergistically initiate the branching of gland lineage (fig S6). Heat maps of differentially expressed ECM organization, cell division, gland morphogenesis, and branch morphogenesis-associated genes were shown in fig. S7. To find the specific genes response to 3D structure cues facilitating MSC reprogramming, we analyzed the differentially expressed genes of four groups of cells (Fig. 4B). The expression of Vwa1, Vsig1, and Hmox1 were only up-regulated with 3D structure stimulation, especially the expression of Hmox1 showed a most significant increase and even showed a higher expression addition with PD, which implied that Hmox1 might be the transcriptional driver of MSC differentiation response to 3D structure cues. Differential expression of several genes was confirmed by quantitative polymerase chain reaction (qPCR): Mmp9, Ptges, and Il10 were up-regulated in all the treated groups. Likewise, genes involving gland morphogenesis and branch morphogenesis such as Bmp2, Tgm2, and Sox9 showed higher expression in 3D/PD-treated group. Bmp2 was up-regulated only in 3D/PD-treated group, combined with the results of GO analysis, we assumed that Bmp2 initiated SG fate through inducing branch morphogenesis and gland differentiation (Fig. 4C).

(A) Gene expression file of four groups of cells (R2DC, MSCs; R2DT, MSC with PD treatment; R3DC, MSC cultured in 3D construct; and R3DT, MSC treated with 3D/PD). (B) Up-regulated genes after treatment (2DC, MSCs; 2DT, MSC with PD treatment; 3DC, MSC cultured in 3D construct; and 3DT, MSC treated with 3D/PD). (C) Differentially expressed genes were further validated by RT-PCR analysis. [For all RT-PCR analyses, gene expression was normalized to glyceraldehyde-3-phosphate dehydrogenase (GAPDH) with 40 cycles, data are represented as the means SEM, and n = 3].

To validate the role of HMOX1 and CTHRC1 in the differentiation of MSCs to SG lineages, we analyzed the gene expression of Bmp2 by regulating the expression of Hmox1 and CTHRC1 based on the 3D/PD-treated MSCs. The effects of caffeic acid phenethyl ester (CAPE) and tin protoporphyrin IX dichloride (Snpp) on the expression of Hmox1 were evaluated by quantitative real-time (qRT)PCR. Hmox1 expression was significantly activated by CAPE and reduced by Snpp. Concentration of CTHRC1 was increased with recombinant CTHRC1 and decreased with CTHRC1 antibody. That is, it was negligible of the effects of activator and inhibitor of Hmox1 and CTHRC1 on cell proliferation (fig. S8, A and B). Hmox1 inhibition or CTHRC1 neutralization could significantly reduce the expression of Bmp2, while Hmox1 activation or increased CTHRC1 both activated Bmp2 expression. Furthermore, Bmp2 showed highest expression by up-regulation of Hmox1 and CTHRC1 simultaneously and sharply decreased with down-regulation of Hmox1 and CTHRC1 at the same time (Fig. 5A). Immunofluorescent staining revealed that the expression of bone morphogenetic protein 2 (BMP2) at the translational level with CTHRC1 and Hmox1 regulation showed a similar trend with transcriptional changes (Fig. 5B). Likewise, the expression of K8 and K18 at transcriptional and translational level changed similarly with CTHRC1 and Hmox1 regulation (fig. S9, A and B). These results suggested that CTHRC1 and Hmox1 played an essential role in SG fate separately, and they synergistically induced SG direction from MSCs (Fig. 5C).

(A and B) Transcriptional analysis (A) and translational analysis (PD, MSCs; PD+, MSCs with 3D/PD treatment; CAPE, MSCs treated with 3D/PD and Hmox1 activator; Snpp, MSCs treated with 3D/PD and Hmox1 inhibitor; Cthrc1, MSCs treated with 3D/PD and recombinant CTHRC1; anti, MSCs treated with 3D/PD and CTHRC1 antibody: +/+, MSCs treated with 3D/PD and Hmox1 activator and recombinant CTHRC1; and /, MSCs treated with 3D/PD and Hmox1 inhibitor and CTHRC1 antibody. Data are represented as the means SEM and n = 3) (B) of bmp2 with regulation of CTHRC1 and Hmox1. (C) The graphic illustration of 3D-bioprinted matrix directed MSC differentiation. CTHRC1 is the main biochemical cues during SG development, and structural cues up-regulated the expression of Hmox1 synergistically initiated branching morphogenesis of SG. *P < 0.05.

Next, we sought to assess the repair capacity of iSGCs for in vivo implications, the 3D-printed construct with green fluorescent protein (GFP)labeled MSCs was transplanted in burned paws of mice (Fig. 6A). We measured the SG repair effects by iodine/starch-based sweat test at day 14. Only mice with 3D/PD treatment showed black dots on foot pads (representing sweating), and the number increased within 10 min; however, no black dots were observed on untreated and single MSC-transplanted mouse foot pads even after 15 min (Fig. 6B). Likewise, hematoxylin and eosin staining analysis revealed SG regeneration in 3D/PD-treated mice (Fig. 6C). GFP-positive cells were characterized as secretory lumen expressing K8, K18, and K19. Of note, the GFP-positive cells were highly distributed in K14-positive myoepithelial cells of SGs but were absent in K14-positive repaired epidermal wounds (Fig. 6, D and E). Thus, differentiated MSCs enabled directed restitution of damaged SG tissues both at the morphological and functional level.

(A) Schematic illustration of approaches for engineering iSGCs and transplantation. (B) Sweat test of mice treated with different cells. Photo credit: Bin Yao, Wound Healing and Cell Biology Laboratory, Institute of Basic Medical Sciences, General Hospital of PLA. (C) Histology of plantar region without treatment and transplantation of MSCs and iSGCs (scale bars, 200 m). (D) Involvement of GFP-labeled iSGCs in directed regeneration of SG tissue in thermal-injured mouse model (K14, red; GFP, green; DAPI, blue; scale bar, 200 m). (E) SG-specific markers K14, K19, K8, and K18 detected in regenerated SG tissue (arrows). (K14, K19, K8, and K18, red; GFP, green; scale bars, 50 m).

A potential gap in MSC-based therapy still exists between current understandings of MSC performance in vivo in their microenvironment and their intractability outside of that microenvironment (24). To regulate MSCs differentiation into the right phenotype, an appropriate microenvironment should be created in a precisely controlled spatial and temporal manner (25). Recent advances in innovative technologies such as bioprinting have enabled the complexities in the matrix design and fabrication of regenerative microenvironments (26). Our findings demonstrated that directed differentiation of MSCs into SGs in a 3D-printed matrix both in vitro and in vivo was feasible. In contrast to conventional tissue-engineering strategies of SG regeneration, the present 3D-printing approach for SG regeneration with overall morphology and function offered a rapid and accurate approach that may represent a ready-to-use therapeutic tool.

Furthermore, bioprinting MSCs successfully repaired the damaged SG in vivo, suggesting that it can improve the regenerative potential of exogenous differentiated MSCs, thereby leading to translational applications. Notably, the GFP-labeled MSC-derived glandular cells were highly distributed in K14-positive myoepithelial cells of newly formed SGs but were absent in K14-positive repaired epidermal wounds. Compared with no black dots were observed on single MSC-transplanted mouse foot pads, the black dots (representing sweating function) can be observed throughout the entire examination period, and the number increased within 10 min on MSC-bioprinted mouse foot pads. Thus, differentiated MSCs by 3D bioprinting enabled exclusive restitution of damaged SG tissues morphologically and functionally.

Although several studies indicated that engineering 3D microenvironments enabled better control of stem cell fates and effective regeneration of functional tissues (2730), there were no studies concerning the establishment of 3D-bioprinted microenvironments that can preferentially induce MSCs differentiating into glandular cells with multiple tissue phenotypes and overall functional tissue. To find an optimal microenvironment for promoting MSC differentiation into specialized progeny, biochemical properties are considered as the first parameter to ensure SG specification. In this study, we used mouse PD as the main composition of a tissue-specific ECM. As expected, this 3D-printed PD+ microenvironment drove the MSC fate decision to enhance the SG phenotypic profile of the differentiated cells. By ECM differential protein expression analysis, we identified that CTHRC1 was a critical biochemical regulator of 3D-printed matrix for SG specification. TSP1 was required for the lineage-specific function during the differentiation in mice but was not dispensable for SG development. Thus, we identified CTHRC1 as a specific factor during SG development. To our knowledge, this is the first demonstration of CTHRC1 involvement in dictating MSC differentiation to SG, highlighting a potential therapeutic tool for SG injury.

The 3D-printed matrix also provided architectural guides for further SG morphogenesis. Our results clearly show that the 3D spatial dimensionality allows for better cell proliferation and aggregation and affect the characteristics of phenotypic marker expression. Notably, the importance of 3D structural cues on MSC differentiation was further proved by MET-EMT process during differentiation, where the influences did not depend on the presence of biochemical cues. To fully elucidate the underlying mechanisms, we first examined how 3D structure regulating stem cell fate choices. According to our data, Hmox1 is highly up-regulated in 3D construct, which were supposed to response to hypoxia, with a previously documented role in MSC differentiation (31, 32). It is suggested that 3D microenvironment induced rapid cell aggregation leading to hypoxia and then activated the expression of Hmox1.

Through regulation of the expression of Hmox1 and addition or of CTHRC1 in the matrix, we confirmed that each of them is critical for SG reprogramming, respectively. Thus, biochemical and structural cues of 3D-printed matrix synergistically creating a microenvironment could enhance the accuracy and efficiency of MSC differentiation, thereby leading to resulting SG formation. Although we further need a more extensive study examining the role of other multiple cues and their possible overlap function in regulating MSC differentiation, our findings suggest that CTHRC1 and Hmox1 provide important signals that cooperatively modulate MSC lineage specification toward sweat glandular lineage. The 3D structure combined with PD stimulated the GO functional item of branch morphogenesis and gland formation, which might be induce by up-regulation of Bmp2 based on the verification of qPCR results. Although our results could not rule out the involvement of other factors and their possible overlapping role in regulating MSC lineage specification toward SGs, our findings together with several literatures suggested that BMP2 plays a critical role in inducing branch morphogenesis and gland formation (3335).

In summary, our findings represented a novel strategy of directing MSC differentiation for functional SG regeneration by using 3D bioprinting and pave the way for a potential therapeutic tool for other complex glandular tissues as well as further investigation into directed differentiation in 3D conditions. Specifically, we showed that biochemical and structural cues of 3D-printed matrix synergistically direct MSC differentiation, and our results highlighted the importance of 3D-printed matrix cues as regulators of MSC fate decisions. This avenue opens up the intriguing possibility of shifting from genetic to microenvironmental manipulations of cell fate, which would be of particular interest for clinical applications of MSC-based therapies.

The main aim and design of the study was first to determine whether by using 3D-printed microenvironments, MSCs can be directed to differentiate and regenerate SGs both morphologically and functionally. Then, to investigate the underlying molecular mechanism of biochemical and structural cues of 3D-printed matrix involved in MSCs reprogramming. The primary aims of the study design were as follows: (i) cell aggregation and proliferation in a 3D-bioprinted construct; (ii) differentiation of MSCs at the cellular phenotype and functional levels in the 3D-bioprinted construct; (iii) the MET-EMT process during differentiation; (iv) differential protein expression of the SG niche in mice; (v) differential genes expression of MSCs in 3D-bioprinted construct; (vi) the key role of CTHRC1 and HMOX1 in MSCs reprogramming to SGCs; and (vii) functional properties of regenerated SG in vivo.

Gelatin (Sigma-Aldrich, USA) and sodium alginate (Sigma-Aldrich, USA) were dissolved in phosphate-buffered saline (PBS) at 15 and 1% (w/v), respectively. Both solutions were sterilized under 70C for 30 min three times at an interval of 30 min. The sterilized solutions were packed into 50-ml centrifuge tubes, stored at 4C, and incubated at 37C before use.

From wild-type C57/B16 mice (Huafukang Co., Beijing) aged 5 days old, dermal homogenates were prepared by homogenizing freshly collected hairless mouse PD with isotonic phosphate buffer (pH 7.4) for 20 min in an ice bath to obtain 25% (w/v) tissue suspension. The supernatant was obtained after centrifugation at 4C for 20 min at 10,000g. The DNA content was determined using Hoechst 33258 assay (Beyotime, Beijing). The fluorescence intensity was measured to assess the amount of remaining DNA within the decellularized ECMs and the native tissue using a fluorescence spectrophotometer (Thermo Scientific, Evolution 260 Bio, USA). The GAGs content was estimated via 1,9-dimethylmethylene blue solution staining. The absorbance was measured with microplate reader at wavelength of 492 nm. The standard curve was made using chondroitin sulfate A. The total COL (Collagen) content was determined via hydroxyproline assay. The absorbance of the samples was measured at 550 nm and quantified by referring to a standard curve made with hydroxyproline.

MSCs were bioprinted with matrix materials by using an extrusion-based 3D bioprinter (Regenovo Co., Bio-Architect PRO, Hangzhou). Briefly, 10 ml of gelatin solution (10% w/v) and 5 ml of alginate solution (2% w/v) were warmed under 37C for 20 min, gently mixed as bioink and used within 30 min. MSCs were collected from 100-mm dishes, dispersed into single cells, and 200 l of cell suspension was gently mixed with matrix material under room temperature with cell density 1 million ml1. PD (58 g/ml) was then gently mixed with bioink. Petri dishes at 60 mm were used as collecting plates in the 3D bioprinting process. Within a temperature-controlled chamber of the bioprinter, with temperature set within the gelation region of gelatin, the mixture of MSCs and matrix materials was bioprinted into a cylindrical construct layer by layer. The nozzle-insulation temperature and printing chamber temperature were set at 18 and 10C, respectively; nozzles with an inner diameter of 260 m were chosen for printing. The diameter of the cylindrical construct was 30 mm, with six layers in height. After the temperature-controlled bioprinting process, the printed 3D constructs were immersed in 100-mM calcium chloride (Sigma-Aldrich, USA) for 3 min for cross-linking, then washed with Dulbeccos modified Eagle medium (DMEM) (Gibco, USA) medium for three times. The whole printing process was finished in 10 min. The 3D cross-linked construct was cultured in DMEM in an atmosphere of 5% CO2 at 37C. The culture medium was changed to SG medium [contains 50% DMEM (Gibco, New York, NY) and 50% F12 (Gibco) supplemented with 5% fetal calf serum (Gibco), 1 ml/100 ml penicillin-streptomycin solution, 2 ng/ml liothyronine sodium (Gibco), 0.4 g/ml hydrocortisone succinate (Gibco), 10 ng/ml epidermal growth factor (PeproTech, Rocky Hill, NJ), and 1 ml/100 ml insulin-transferrin-selenium (Gibco)] 2 days later. The cell morphology was examined and recorded under an optical microscope (Olympus, CX40, Japan).

Fluorescent live/dead staining was used to determine cell viability in the 3D cell-loaded constructs according to the manufacturers instructions (Sigma-Aldrich, USA). Briefly, samples were gently washed in PBS three times. An amount of 1 M calcein acetoxymethyl (calcein AM) ester (Sigma-Aldrich, USA) and 2 M propidium iodide (Sigma-Aldrich, USA) was used to stain live cells (green) and dead cells (red) for 15 min while avoiding light. A laser scanning confocal microscopy system (Leica, TCSSP8, Germany) was used for image acquisition.

The cell-printed structure was harvested and fixed with a solution of 4% paraformaldehyde. The structure was embedded in optimal cutting temperature (OCT) compound (Sigma-Aldrich, USA) and sectioned 10-mm thick by using a cryotome (Leica, CM1950, Germany). The sliced samples were washed repeatedly with PBS solution to remove OCT compound and then permeabilized with a solution of 0.1% Triton X-100 (Sigma-Aldrich, USA) in PBS for 5 min. To reduce nonspecific background, sections were treated with 0.2% bovine serum albumin (Sigma-Aldrich, USA) solution in PBS for 20 min. To visualize iSGCs, sections were incubated with primary antibody overnight at 4C for anti-K8 (1:300), anti-K14 (1:300), anti-K18 (1:300), anti-K19 (1:300), anti-ATP1a1 (1:300), anti-Ki67 (1:300), antiN-cadherin (1:300), antiE-cadherin (1:300), anti-CTHRC1 (1:300), or anti-TSP1 (1:300; all Abcam, UK) and then incubated with secondary antibody for 2 hours at room temperature: Alexa Fluor 594 goat anti-rabbit (1:300), fluorescein isothiocyanate (FITC) goat anti-rabbit (1:300), FITC goat anti-mouse (1:300), or Alexa Fluor 594 goat anti-mouse (1:300; all Invitrogen, CA). Sections were also stained with 4,6-diamidino-2-phenylindole (Beyotime, Beijing) for 15 min. Stained samples were visualized, and images were captured under a confocal microscope.

To harvest the cells in the construct, the 3D constructs were dissolved by adding 55 mM sodium citrate and 20 mM EDTA (Sigma-Aldrich, USA) in 150 mM sodium chloride (Sigma-Aldrich, USA) for 5 min while gently shaking the petri dish for better dissolving. After transfer to 15-ml centrifuge tubes, the cell suspensions were centrifuged at 200 rpm for 3 min, and the supernatant liquid was removed to harvest cells for further analysis.

Total RNA was isolated from cells by using TRIzol reagent (Invitrogen, USA) following the manufacturers protocol. RNA concentration was measured by using a NanoPhotometer (Implen GmbH, P-330-31, Germany). Reverse transcription involved use of a complementary DNA synthesis kit (Takara, China). Gene expression was analyzed quantitatively by using SYBR green with the 7500 Real-Time PCR System (Takara, China). The primers and probes for genes were designed on the basis of published gene sequences (table S1) (National Center for Biotechnology Information and PubMed). The expression of each gene was normalized to that for glyceraldehyde-3-phosphate dehydrogenase and analyzed by the 2-CT method. Each sample was assessed in triplicate.

The culture medium was changed to SG medium with 2 mM CaCl2 for at least 24 hours, and cells were loaded with fluo-3/AM (Invitrogen, CA) at a final concentration of 5 M for 30 min at room temperature. After three washes with calcium-free PBS, 10 M acetylcholine (Sigma-Aldrich, USA) was added to cells. The change in the Fluo 3 fluorescent signal was recorded under a laser scanning confocal microscopy.

Cell proliferation was evaluated through CCK-8 (Cell counting kit-8) assay. Briefly, cells were seeded in 96-well plates at the appropriate concentration and cultured at 37C in an incubator for 4 hours. When cells were adhered, 10 l of CCK-8 working buffer was added into the 96-well plates and incubated at 37C for 1 hour. Absorbance at 450 nm was measured with a microplate reader (Tecan, SPARK 10M, Austria).

Proteomics of mouse PD and DD involved use of isobaric tags for relative and absolute quantification (iTRAQ) in BGI Company, with differentially expressed proteins detected in PD versus DD. Twofold greater difference in expression was considered significant for further study.

Tissues were grinded and lysed in radioimmunoprecipitation assay buffer (Beyotime, Nanjing). Proteins were separated by 12% SDSpolyacrylamide gel electrophoresis and transferred to a methanol-activated polyvinylidene difluoride membrane (GE Healthcare, USA). The membrane was blocked for 1 hour in PBS with Tween 20 containing 5% bovine serum albumin (Sigma-Aldrich, USA) and probed with the antibodies anti-CTHRC1 (1:1000) and anti-TSP1 (1:1000; both Abcam, UK) overnight at 4C. After 2 hours of incubation with goat anti-rabbit horseradish peroxidaseconjugated secondary antibody (Santa Cruz Biotechnology, CA), the protein bands were detected by using luminal reagent (GE Healthcare, ImageQuant LAS 4000, USA).

Total RNA was prepared with TRIzol (Invitrogen), and RNA sequencing was performed using HiSeq 2500 (Illumina). Genes with false discovery rate < 0.05, fold difference > 2.0, and mean log intensity > 2.0 were considered to be significant.

CAPE or Snpp was gently mixed with bioink at a concentration of 10 M. Physiological concentration of CTHRC1 was measured by enzyme linked immunosorbent assay (ELISA) (80 ng/ml), and then recombinant CTHRC1 or CTHRC1 antibody was added into the bioink at a concentration of 0.4 g/ml. The effect of inhibitor and activator was estimated by qRT-PCR or ELISA.

Mice were anesthetized with pentobarbital (100 mg/kg) and received subcutaneous buprenorphine (0.1 mg/kg) preoperatively. Full-thickness scald injuries were created on paw pads with soldering station (Weller, WSD81, Germany). Mice recovered in clean cages with paper bedding to prevent irritation or infection. Mice were monitored daily and euthanized at 30 days after wounding. Mice were maintained in an Association for Assessment and Accreditation of Laboratory Animal Careaccredited animal facility, and procedures were performed with Institutional Animal Care and Use Committeeapproved protocols.

MSCs in 3D-printed constructs with PD were cultured with DMEM for 2 days and then replaced with SG medium. The SG medium was changed every 2 days, and cells were harvested on day 12. The K18+ iSGCs were sorting through flow cytometry and injected into the paw pads (1 106 cells/50 l) of the mouse burn model by using Microliter syringes (Hamilton, 7655-01, USA). Then, mice were euthanized after 14 days; feet were excised and fixed with 10% formalin (Sigma-Aldrich, USA) overnight for paraffin sections and immunohistological analysis.

The foot pads of anesthetized treated mice were first painted with 2% (w/v) iodine/ethanol solution then with starch/castor oil solution (1 g/ml) (Sigma-Aldrich, USA). After drying, 50 l of 100 M acetylcholine (Sigma-Aldrich, USA) was injected subcutaneously into paws of mice. Pictures of the mouse foot pads were taken after 5, 10, and 15 min.

All data were presented as means SEM. Statistical analyses were performed using GraphPad Prism7 statistical software (GraphPad, USA). Significant differences were calculated by analysis of variance (ANOVA), followed by the Bonferroni test when performing multiple comparisons between groups. P < 0.05 was considered as a statistically significant difference.

Supplementary material for this article is available at http://advances.sciencemag.org/cgi/content/full/6/10/eaaz1094/DC1

Fig. S1. Biocompatibility of 3D-bioprinted construct and cellular morphology in 2D monolayer culture.

Fig. S2. Expression of SG-specific and secretion-related markers in MSCs and SG cells in vitro.

Fig. S3. Transcriptional and translational expression of epithelial and mesenchymal markers in 3D-bioprinted cells with and without PD.

Fig. S4. Expression of N- and E-cadherin in MSCs and SG cells in 2D monolayer culture.

Fig. S5. Proteomic microarray assay of differential gene expression between PD and DD ECM in postnatal mice.

Fig. S6. GO term analysis of differentially expressed pathways.

Fig. S7. Heat maps illustrating differential expression of genes implicated in ECM organization, cell division, and gland and branch morphogenesis.

Fig. S8. The expression of Hmox1 and the concentration of CTHRC1 on treatment and the related effects on cell proliferation.

Fig. S9. The expression of K8 and K18 with Hmox1 and CTHRC1 regulation.

Table S1. Primers for qRT-PCR of all the genes.

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.

Acknowledgments: Funding: This study was supported in part by the National Nature Science Foundation of China (81571909, 81701906, 81830064, and 81721092), the National Key Research Development Plan (2017YFC1103300), Military Logistics Research Key Project (AWS17J005), and Fostering Funds of Chinese PLA General Hospital for National Distinguished Young Scholar Science Fund (2017-JQPY-002). Author contributions: B.Y. and S.H. were responsible for the design and primary technical process, conducted the experiments, collected and analyzed data, and wrote the manuscript. Y.W. and R.W. helped perform the main experiments. Y.Z. and T.H. participated in the 3D printing. W.S. and Z.L. participated in cell experiments and postexamination. S.H. and X.F. collectively oversaw the collection of data and data interpretation and revised the manuscript. Competing interests: The authors declare that they have no competing interests. Data and materials availability: All data needed to evaluate the conclusions in the paper are present in the paper and/or the Supplementary Materials. Additional data related to this paper may be requested from the authors.

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With Over 280 Therapies Under Evaluation, the Stem Cell Therapy Market is Estimated to be Worth USD 8.5 Billion by 2030, Claims Roots Analysis – P&T…

The success of approved stem cell therapies has caused a surge in interest of biopharma developers in this field; many innovator companies are currently progressing proprietary leads across different phases of clinical development, with cautious optimism

LONDON, March 4, 2020 /PRNewswire/ -- Roots Analysishas announced the addition of "Global Stem Cells Market: Focus on Clinical Therapies, 20202030 (Based on Source (Allogeneic, Autologous); Origin (Adult, Embryonic); Type (Hematopoietic, Mesenchymal, Progenitor); Lineage (Amniotic Fluid, Adipose Tissue, Bone Marrow, Cardiosphere, Chondrocytes, Corneal Tissue, Cord Blood, Dental Pulp, Neural Tissue Placenta, Peripheral Blood, Stromal Cells); and Potency (Multipotent, Pluripotent))" report to its list of offerings.

There is a growing body of evidence supporting the vast applicability and superiority of treatment outcomes of stem cell therapies, compared to conventional treatment options. In fact, the unmet needs within this domain have spurred the establishment of many start-ups in recent years.

To order this 500+ page report, which features 185+ figures and 220+ tables, please visit this link

Key Market Insights

Over 280 stem cell therapies are under development, most of which are allogeneic products

More than 50% of the pipeline candidates are in the mid to late phase trials (phase II and above), and allogenic therapies (majority of which are derived from the bone marrow) make up 65% of the pipeline.

70% of pipeline candidates are based on mesenchymal stem cells

It is worth highlighting that the abovementioned therapies are designed to treat musculoskeletal (22%), neurological (21%) and cardiovascular (15%) disorders. On the other hand, hematopoietic stem cell-based products are mostly being evaluated for the treatment of oncological disorders, primarily hematological malignancies.

Close to 85% stem cell therapy developers are based in North America and Asia-Pacific regions

Within these regions, the US, China, South Korea and Japan, have emerged as key R&D hubs for stem cell therapies. It is worth noting that majority of the initiatives in this domain are driven by small / mid-sized companies

Over 1,500 grants were awarded for stem cell research, since 2015

More than 45% of the total amount was awarded under the R01 mechanism (which supports research projects). The NCI, NHLBI, NICHD, NIDDK, NIGMS and OD emerged as key organizations that have offered financial support for time periods exceeding 25 years as well.

Outsourcing has become indispensable to R&D and manufacturing activity in this domain

Presently, more than 80 industry / non-industry players, based in different regions across the globe, claim to provide contract development and manufacturing services to cater to the unmet needs of therapy developers. Examples include (in alphabetical order) Bio Elpida, Cell and Gene Therapy Catapult, Cell Tech Pharmed, GenCure, KBI Biopharma, Lonza, MEDINET, Nikon CeLL innovation, Roslin Cell Therapies, WuXi Advanced Therapies and YposKesi.

North America and Asia-Pacific markets are anticipated to capture over 80% share by 2030

The stem cell therapies market is anticipated to witness an annualized growth rate of over 30% during the next decade. Interestingly, the market in China / broader Asia-Pacific region is anticipated to grow at a relatively faster rate.

To request a sample copy / brochure of this report, please visit this link

Key Questions Answered

The USD 8.5 billion (by 2030) financial opportunity within the stem cell therapies market has been analyzed across the following segments:

The report features inputs from eminent industry stakeholders, according to whom stem cell therapies are currently considered to be a promising alternatives for the treatment of a myriad of disease indications, with the potential to overcome challenges associated with conventional treatment options. The report includes detailed transcripts of discussions held with the following experts:

The research covers brief profiles of several companies (including those listed below); each profile features an overview of the company, financial information (if available), stem cell therapy portfolio and an informed future outlook.

For additional details, please visit

https://www.rootsanalysis.com/reports/view_document/stem-cells-market/296.htmlor email sales@rootsanalysis.com

You may also be interested in the following titles:

Contact:Gaurav Chaudhary+1(415)800-3415+44(122)391-1091Gaurav.Chaudhary@rootsanalysis.com

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With Over 280 Therapies Under Evaluation, the Stem Cell Therapy Market is Estimated to be Worth USD 8.5 Billion by 2030, Claims Roots Analysis - P&T...

Avectas and CCRM partner on cell engineering – BioPharma-Reporter.com

The Solupore platform looks to support the burgeoning industry pipeline of cell and gene therapies by supporting the non-viral cell engineering of therapeutics.

At present, a shortage in capacity for the production of viral vectors, used in the development of cell and gene therapies, has resulted in waiting lists being established for companies to have access to the limited supply.

Avectas and CCRM (Centre for Commercialization of Regenerative Medicine) have partnered with the aim of addressing this need, by facilitating the Solupore platform into the clinic.

According to Avectas, its platform utilizes a membrane disruptive approach to deliver nucleic acids and proteins to cells. The Irish company is currently developing a closed continuous system for good manufacturing practice (GMP) manufacturing.

In terms of the benefits of its method of cell engineering, the company stated that unlike industry standards, Avectas technology is gentle to the cells allowing rapid recovery and functionality. There is no stall time in cell proliferation resulting in a faster cell engineering process.

The technology is also scalable and can be adjusted to the volume of cells needed for clinical therapies, suggested Avectas. The potential molecules that could be generated by this approach include mRNA, proteins and gene editing tools.

For its part, CCRM is a non-profit organization that is able to offer expertise in stem cell and biomaterials technologies through its strategic advisory board, which combines expertise from Canadian and US universities, amongst other global participants.

In addition, the CCRM has a network of industry companies, which features Amgen, Pfizer, Pall, and Roche.

Michael Maguire, CEO of Avectas, said: We are delighted to partner with CCRMto leverage their deep experience in cell manufacturing processes to support the translation of our Solupore platform towards clinical applications.

As well as looking to partner with immuno-oncology and gene editing business to produce their drug candidates, Avectas noted that it is also looking to in-license therapeutic molecules to build its own pipeline of potential products.

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Avectas and CCRM partner on cell engineering - BioPharma-Reporter.com

Stem Cell Market Size Worth $17.9 Billion by 2027 | CAGR: 8.2%: Grand View Research, Inc. – PR Newswire UK

SAN FRANCISCO, March 2, 2020 /PRNewswire/ -- The global stem cell marketsize is expected to reach USD 17.9 billion by 2027, expanding at a CAGR of 8.2%, according to a new report by Grand View Research, Inc. Recent advances in tissue engineering strategies hold the potential to draw attention to the treatment of several chronic disorders. Moreover, automation in adult and cord blood processing and storage is expected to drive market growth significantly.

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Read 190 page research report with ToC on "Stem Cells Market Size, Share & Trends Analysis Report By Product (Adult Stem Cells, HESC), By Application, By Technology, By Therapy, By Region, And Segment Forecasts, 2020 - 2027" at: https://www.grandviewresearch.com/industry-analysis/stem-cells-market

The development of banking facilities and resultant enhancement of stem cell production, storage, and characterization are also expected to enhance the volumetric capabilities of this therapy, globally. This would lead to revenue generation in the global market.

Regenerative medicine and cellular therapies are considered to transform the healthcare industry in a few years. Therefore, key players are focused on developing advanced therapeutics for the treatment of Alzheimer's disease, Parkinson's disease, degenerative eye disorders, cancer, and stroke. Most of these therapies are under clinical trials and are expected to be launched soon.

Furthermore, the presence of a strong, diverse clinical pipeline is expected to accelerate revenue generation in the global market. Easy access to data through genomic, proteomic, and EHR databases has encouraged companies to investigate various therapies to aid in the treatment of previously untreatable conditions.

Grand View Research has segmented the global stem cells market on the basis of product, application, technology, therapy, and region:

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About Grand View Research

Grand View Research, U.S.-based market research and consulting company, provides syndicated as well as customized research reports and consulting services. Registered in California and headquartered in San Francisco, the company comprises over 425 analysts and consultants, adding more than 1200 market research reports to its vast database each year. These reports offer in-depth analysis on 46 industries across 25 major countries worldwide. With the help of an interactive market intelligence platform, Grand View Research helps Fortune 500 companies and renowned academic institutes understand the global and regional business environment and gauge the opportunities that lie ahead.

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Sherry James Corporate Sales Specialist, USA Grand View Research, Inc. Phone: +1-415-349-0058 Toll Free: 1-888-202-9519 Email: sales@grandviewresearch.comWeb: https://www.grandviewresearch.comFollow Us: LinkedIn| Twitter

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SOURCE Grand View Research, Inc.

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Stem Cell Market Size Worth $17.9 Billion by 2027 | CAGR: 8.2%: Grand View Research, Inc. - PR Newswire UK

Regenerative Medicine Market Analysis Growth Demand, Key Players, Share Size, and Forecast To 2025 – Monroe Scoop

Regenerative Medicine Market: Snapshot

Regenerative medicine is a part of translational research in the fields of molecular biology and tissue engineering. This type of medicine involves replacing and regenerating human cells, organs, and tissues with the help of specific processes. Doing this may involve a partial or complete reengineering of human cells so that they start to function normally.

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Regenerative medicine also involves the attempts to grow tissues and organs in a laboratory environment, wherein they can be put in a body that cannot heal a particular part. Such implants are mainly preferred to be derived from the patients own tissues and cells, particularly stem cells. Looking at the promising nature of stem cells to heal and regenerative various parts of the body, this field is certainly expected to see a bright future. Doing this can help avoid opting for organ donation, thus saving costs. Some healthcare centers might showcase a shortage of organ donations, and this is where tissues regenerated using patients own cells are highly helpful.

There are several source materials from which regeneration can be facilitated. Extracellular matrix materials are commonly used source substances all over the globe. They are mainly used for reconstructive surgery, chronic wound healing, and orthopedic surgeries. In recent times, these materials have also been used in heart surgeries, specifically aimed at repairing damaged portions.

Cells derived from the umbilical cord also have the potential to be used as source material for bringing about regeneration in a patient. A vast research has also been conducted in this context. Treatment of diabetes, organ failure, and other chronic diseases is highly possible by using cord blood cells. Apart from these cells, Whartons jelly and cord lining have also been shortlisted as possible sources for mesenchymal stem cells. Extensive research has conducted to study how these cells can be used to treat lung diseases, lung injury, leukemia, liver diseases, diabetes, and immunity-based disorders, among others.

Global Regenerative Medicine Market: Overview

The global market for regenerative medicine market is expected to grow at a significant pace throughout the forecast period. The rising preference of patients for personalized medicines and the advancements in technology are estimated to accelerate the growth of the global regenerative medicine market in the next few years. As a result, this market is likely to witness a healthy growth and attract a large number of players in the next few years. The development of novel regenerative medicine is estimated to benefit the key players and supplement the markets growth in the near future.

Global Regenerative Medicine Market: Key Trends

The rising prevalence of chronic diseases and the rising focus on cell therapy products are the key factors that are estimated to fuel the growth of the global regenerative medicine market in the next few years. In addition, the increasing funding by government bodies and development of new and innovative products are anticipated to supplement the growth of the overall market in the next few years.

On the flip side, the ethical challenges in the stem cell research are likely to restrict the growth of the global regenerative medicine market throughout the forecast period. In addition, the stringent regulatory rules and regulations are predicted to impact the approvals of new products, thus hampering the growth of the overall market in the near future.

Global Regenerative Medicine Market: Market Potential

The growing demand for organ transplantation across the globe is anticipated to boost the demand for regenerative medicines in the next few years. In addition, the rapid growth in the geriatric population and the significant rise in the global healthcare expenditure is predicted to encourage the growth of the market. The presence of a strong pipeline is likely to contribute towards the markets growth in the near future.

Global Regenerative Medicine Market: Regional Outlook

In the past few years, North America led the global regenerative medicine market and is likely to remain in the topmost position throughout the forecast period. This region is expected to account for a massive share of the global market, owing to the rising prevalence of cancer, cardiac diseases, and autoimmunity. In addition, the rising demand for regenerative medicines from the U.S. and the rising government funding are some of the other key aspects that are likely to fuel the growth of the North America market in the near future.

Furthermore, Asia Pacific is expected to register a substantial growth rate in the next few years. The high growth of this region can be attributed to the availability of funding for research and the development of research centers. In addition, the increasing contribution from India, China, and Japan is likely to supplement the growth of the market in the near future.

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Global Regenerative Medicine Market: Competitive Analysis

The global market for regenerative medicines is extremely fragmented and competitive in nature, thanks to the presence of a large number of players operating in it. In order to gain a competitive edge in the global market, the key players in the market are focusing on technological developments and research and development activities. In addition, the rising number of mergers and acquisitions and collaborations is likely to benefit the prominent players in the market and encourage the overall growth in the next few years.

Some of the key players operating in the regenerative medicine market across the globe areVericel Corporation, Japan Tissue Engineering Co., Ltd., Stryker Corporation, Acelity L.P. Inc. (KCI Licensing), Organogenesis Inc., Medtronic PLC, Cook Biotech Incorporated, Osiris Therapeutics, Inc., Integra Lifesciences Corporation, and Nuvasive, Inc.A large number of players are anticipated to enter the global market throughout the forecast period.

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Regenerative Medicine Market Analysis Growth Demand, Key Players, Share Size, and Forecast To 2025 - Monroe Scoop