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Watari K, Yamasaki S, Tu HY, Shikamura M, Kamei T, Adachi H, Tochitani T, Kita Y, Nakamura A, Ueyama K, Ono K, Morinaga C, Matsuyama T, Sho J, Nakamura M, Fujiwara M, Hori Y, Tanabe A, Hirai R, Terai O, Ohno O, Ohara H, Hayama T, Ikeda A, Nukaya D, Matsushita K, Takahashi M, Kishino A, Kimura T, Kawamata S, Mandai M, Kuwahara A. Self-organization, quality control, and preclinical studies of human iPSC-derived retinal sheets for tissue-transplantation therapy. Commun Biol 2023; 6:164. [PMID: 36765170 PMCID: PMC9918541 DOI: 10.1038/s42003-023-04543-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 01/31/2023] [Indexed: 02/12/2023] Open
Abstract
Three-dimensional retinal organoids (3D-retinas) are a promising graft source for transplantation therapy. We previously developed self-organizing culture for 3D-retina generation from human pluripotent stem cells (hPSCs). Here we present a quality control method and preclinical studies for tissue-sheet transplantation. Self-organizing hPSCs differentiated into both retinal and off-target tissues. Gene expression analyses identified the major off-target tissues as eye-related, cortex-like, and spinal cord-like tissues. For quality control, we developed a qPCR-based test in which each hPSC-derived neuroepithelium was dissected into two tissue-sheets: inner-central sheet for transplantation and outer-peripheral sheet for qPCR to ensure retinal tissue selection. During qPCR, tissue-sheets were stored for 3-4 days using a newly developed preservation method. In a rat tumorigenicity study, no transplant-related adverse events were observed. In retinal degeneration model rats, retinal transplants differentiated into mature photoreceptors and exhibited light responses in electrophysiology assays. These results demonstrate our rationale toward self-organizing retinal sheet transplantation therapy.
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Affiliation(s)
- Kenji Watari
- grid.417741.00000 0004 1797 168XRegenerative & Cellular Medicine Kobe Center, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan
| | - Suguru Yamasaki
- grid.417741.00000 0004 1797 168XRegenerative & Cellular Medicine Kobe Center, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan ,grid.508743.dLaboratory for Retinal Regeneration, RIKEN Center for Biosystems Dynamics Research, Chuo-ku, Kobe 650-0047 Japan
| | - Hung-Ya Tu
- grid.508743.dLaboratory for Retinal Regeneration, RIKEN Center for Biosystems Dynamics Research, Chuo-ku, Kobe 650-0047 Japan
| | - Masayuki Shikamura
- grid.417982.10000 0004 0623 246XResearch & Development Center for Cell Therapy, Foundation for Biomedical Research and Innovation at Kobe, Chuo-ku, Kobe 650-0047 Japan
| | - Tatsuya Kamei
- grid.417741.00000 0004 1797 168XRegenerative & Cellular Medicine Kobe Center, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan
| | - Hideki Adachi
- grid.417741.00000 0004 1797 168XPreclinical Research Unit, Research Division, Sumitomo Pharma Co., Ltd., Konohana-ku, Osaka 554-0022 Japan
| | - Tomoaki Tochitani
- grid.417741.00000 0004 1797 168XPreclinical Research Unit, Research Division, Sumitomo Pharma Co., Ltd., Konohana-ku, Osaka 554-0022 Japan
| | - Yasuyuki Kita
- grid.417741.00000 0004 1797 168XRegenerative & Cellular Medicine Kobe Center, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan
| | - Aya Nakamura
- grid.417741.00000 0004 1797 168XTechnology Research & Development Division, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan
| | - Kazuki Ueyama
- grid.417741.00000 0004 1797 168XTechnology Research & Development Division, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan
| | - Keiichi Ono
- grid.417741.00000 0004 1797 168XTechnology Research & Development Division, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan
| | - Chikako Morinaga
- grid.508743.dLaboratory for Retinal Regeneration, RIKEN Center for Biosystems Dynamics Research, Chuo-ku, Kobe 650-0047 Japan ,grid.7597.c0000000094465255RIKEN Program for Drug Discovery and Medical Technology Platforms, RIKEN Cluster for Science, Technology and Innovation Hub., Saitama, 351-0198 Japan
| | - Take Matsuyama
- grid.508743.dLaboratory for Retinal Regeneration, RIKEN Center for Biosystems Dynamics Research, Chuo-ku, Kobe 650-0047 Japan
| | - Junki Sho
- grid.508743.dLaboratory for Retinal Regeneration, RIKEN Center for Biosystems Dynamics Research, Chuo-ku, Kobe 650-0047 Japan
| | - Miyuki Nakamura
- grid.417982.10000 0004 0623 246XResearch & Development Center for Cell Therapy, Foundation for Biomedical Research and Innovation at Kobe, Chuo-ku, Kobe 650-0047 Japan
| | - Masayo Fujiwara
- grid.417741.00000 0004 1797 168XRegenerative & Cellular Medicine Kobe Center, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan
| | - Yoriko Hori
- grid.417741.00000 0004 1797 168XRegenerative & Cellular Medicine Kobe Center, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan
| | - Anna Tanabe
- grid.417741.00000 0004 1797 168XRegenerative & Cellular Medicine Kobe Center, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan
| | - Rina Hirai
- grid.417741.00000 0004 1797 168XRegenerative & Cellular Medicine Kobe Center, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan
| | - Orie Terai
- grid.417741.00000 0004 1797 168XRegenerative & Cellular Medicine Kobe Center, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan
| | - Osamu Ohno
- grid.417741.00000 0004 1797 168XRegenerative & Cellular Medicine Kobe Center, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan
| | - Hidetaka Ohara
- grid.417741.00000 0004 1797 168XRegenerative & Cellular Medicine Kobe Center, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan
| | - Tetsuya Hayama
- grid.417741.00000 0004 1797 168XRegenerative & Cellular Medicine Kobe Center, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan
| | - Atsushi Ikeda
- grid.417741.00000 0004 1797 168XRegenerative & Cellular Medicine Kobe Center, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan
| | - Daiki Nukaya
- grid.417741.00000 0004 1797 168XRegenerative & Cellular Medicine Kobe Center, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan
| | - Keizo Matsushita
- grid.417741.00000 0004 1797 168XRegenerative & Cellular Medicine Kobe Center, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan ,grid.508743.dLaboratory for Retinal Regeneration, RIKEN Center for Biosystems Dynamics Research, Chuo-ku, Kobe 650-0047 Japan
| | - Masayo Takahashi
- grid.508743.dLaboratory for Retinal Regeneration, RIKEN Center for Biosystems Dynamics Research, Chuo-ku, Kobe 650-0047 Japan
| | - Akiyoshi Kishino
- grid.417741.00000 0004 1797 168XRegenerative & Cellular Medicine Kobe Center, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan
| | - Toru Kimura
- grid.417741.00000 0004 1797 168XRegenerative & Cellular Medicine Kobe Center, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe 650-0047 Japan
| | - Shin Kawamata
- grid.417982.10000 0004 0623 246XResearch & Development Center for Cell Therapy, Foundation for Biomedical Research and Innovation at Kobe, Chuo-ku, Kobe 650-0047 Japan
| | - Michiko Mandai
- grid.508743.dLaboratory for Retinal Regeneration, RIKEN Center for Biosystems Dynamics Research, Chuo-ku, Kobe 650-0047 Japan ,grid.7597.c0000000094465255RIKEN Program for Drug Discovery and Medical Technology Platforms, RIKEN Cluster for Science, Technology and Innovation Hub., Saitama, 351-0198 Japan
| | - Atsushi Kuwahara
- Regenerative & Cellular Medicine Kobe Center, Sumitomo Pharma Co., Ltd., Chuo-ku, Kobe, 650-0047, Japan.
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Tokuda K, Ikemoto T, Yamashita S, Miyazaki K, Okikawa S, Yamada S, Saito Y, Morine Y, Shimada M. Syngeneically transplanted insulin producing cells differentiated from adipose derived stem cells undergo delayed damage by autoimmune responses in NOD mice. Sci Rep 2022; 12:5852. [PMID: 35393479 PMCID: PMC8991208 DOI: 10.1038/s41598-022-09838-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 03/21/2022] [Indexed: 11/09/2022] Open
Abstract
Insulin-producing cells (IPCs) generated by our established protocol have reached the non-clinical ‘proof of concept’ stage. Our strategy for their clinical application is the autotransplantation of IPCs into patients with type 1 diabetes mellitus (T1DM). In this context, the autoimmunity that characterized T1DM is important, rather than allorejection. We aimed to determine how these IPCs respond to T1DM autoimmunity. IPCs were generated from the subcutaneous fat tissue of non-obese diabetic (NOD) mice using our protocol. IPCs derived from NOD mice were transplanted under the kidney capsules of NOD mice at the onset of diabetes and the subsequent changes in blood glucose concentration were characterized. Blood glucose decreased within 30 days of transplantation, but increased again after 40–60 days in three of four recipient NOD mice. In tissue samples, the numbers of CD4+ and CD8+ T cells were significantly higher 60 days after transplantation than 30 days after transplantation. In conclusion, IPCs significantly ameliorate the diabetes of mice in the short term, but are damaged by autoimmunity in the longer term, as evidenced by local T cells accumulation. This study provides new insights into potential stem cell therapies for T1DM.
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Affiliation(s)
- Kazunori Tokuda
- Department of Digestive and Transplant Surgery, Tokushima University, Tokushima, 770-8503, Japan
| | - Tetsuya Ikemoto
- Department of Digestive and Transplant Surgery, Tokushima University, Tokushima, 770-8503, Japan.
| | - Shoko Yamashita
- Department of Digestive and Transplant Surgery, Tokushima University, Tokushima, 770-8503, Japan
| | - Katsuki Miyazaki
- Department of Digestive and Transplant Surgery, Tokushima University, Tokushima, 770-8503, Japan
| | - Shohei Okikawa
- Department of Digestive and Transplant Surgery, Tokushima University, Tokushima, 770-8503, Japan
| | - Shinichiro Yamada
- Department of Digestive and Transplant Surgery, Tokushima University, Tokushima, 770-8503, Japan
| | - Yu Saito
- Department of Digestive and Transplant Surgery, Tokushima University, Tokushima, 770-8503, Japan
| | - Yuji Morine
- Department of Digestive and Transplant Surgery, Tokushima University, Tokushima, 770-8503, Japan
| | - Mitsuo Shimada
- Department of Digestive and Transplant Surgery, Tokushima University, Tokushima, 770-8503, Japan
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Sultana T, Dayem AA, Lee SB, Cho SG, Lee JI. Effects of carrier solutions on the viability and efficacy of canine adipose-derived mesenchymal stem cells. BMC Vet Res 2022; 18:26. [PMID: 34996443 PMCID: PMC8739692 DOI: 10.1186/s12917-021-03120-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 12/16/2021] [Indexed: 11/10/2022] Open
Abstract
Background Mesenchymal stem cells (MSCs) have favorable characteristics that render them a potent therapeutic tool. We tested the characteristics of MSCs after temporal storage in various carrier solutions, such as 0.9% saline (saline), 5% dextrose solution (DS), heparin in saline, and Hartmann’s solution, all of which are approved by the U.S. Food and Drug Administration (FDA). Phosphate-buffered saline, which does not have FDA approval, was also used as a carrier solution. We aimed to examine the effects of these solutions on the viability and characteristics of MSCs to evaluate their suitability and efficacy for the storage of canine adipose-derived MSCs (cADMSCs). Results We stored the cADMSCs in the test carrier solutions in a time-dependent manner (1, 6, and 12 h) at 4 °C, and analyzed cell confluency, viability, proliferation, self-renewability, and chondrogenic differentiation. Cell confluency was significantly higher in 5% DS and lower in phosphate-buffered saline at 12 h compared to other solutions. cADMSCs stored in saline for 12 h showed the highest viability rate. However, at 12 h, the proliferation rate of cADMSCs was significantly higher after storage in 5% DS and significantly lower after storage in saline, compared to the other solutions. cADMSCs stored in heparin in saline showed superior chondrogenic capacities at 12 h compared to other carrier solutions. The expression levels of the stemness markers, Nanog and Sox2, as well as those of the MSC surface markers, CD90 and CD105, were also affected over time. Conclusion Our results suggest that MSCs should be stored in saline, 5% DS, heparin in saline, or Hartmann’s solution at 4 °C, all of which have FDA approval (preferable storage conditions: less than 6 h and no longer than 12 h), rather than storing them in phosphate-buffered saline to ensure high viability and efficacy.
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Affiliation(s)
- Tania Sultana
- Regenerative Medicine Laboratory, Center for Stem Cell Research, Department of Biomedical Science and Technology, Institute of Biomedical Science and Technology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, Republic of Korea
| | - Ahmed Abdal Dayem
- Department of Stem Cell and Regenerative Biotechnology, Konkuk University, Seoul, 05029, Republic of Korea
| | - Soo Bin Lee
- Department of Stem Cell and Regenerative Biotechnology, Konkuk University, Seoul, 05029, Republic of Korea
| | - Ssang-Goo Cho
- Department of Stem Cell and Regenerative Biotechnology, Konkuk University, Seoul, 05029, Republic of Korea
| | - Jeong Ik Lee
- Regenerative Medicine Laboratory, Center for Stem Cell Research, Department of Biomedical Science and Technology, Institute of Biomedical Science and Technology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, Republic of Korea. .,Department of Veterinary Obstetrics and Theriogenology, College of Veterinary Medicine, Konkuk University, Seoul, Republic of Korea.
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Forbes D, Russ B, Kilani R, Ghahary A, Jalili R. Liquid Dermal Scaffold With Adipose-Derived Stem Cells Improve Tissue Quality in a Murine Model of Impaired Wound Healing. J Burn Care Res 2019; 40:550-557. [PMID: 31188436 DOI: 10.1093/jbcr/irz099] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Wound repair and regeneration is a multidisciplinary field of research with considerable potential value to the management of deep and large burn injuries. These injuries lack an appropriate tissue scaffold and pro-healing cells making them difficult to heal. An alternative to the often limited autologous skin is a therapy that would restore the essential matrix and cellular components for rapid healing. In this study, they use a novel liquid dermal scaffold capable of gelation in vivo to show that it is biocompatible with adipose-derived stem cells. Using a validated method of wound splinting in a delayed-healing murine model, we show that wounds treated with the scaffold and stem cells had a significant reduction in wound size and had accelerated healing compared with control. The wounds treated with stem cells had increased capillary formation, collagen content, epidermal thickness, and essential growth factor expression in the healed tissue compared with control and liquid scaffold alone. This liquid dermal scaffold combined with cells is a feasible treatment strategy for complex or large burn wounds that are otherwise lacking the appropriate cellular matrix necessary for healing.
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Affiliation(s)
- Diana Forbes
- Division of Plastic Surgery, Department of Surgery, University of British Columbia, Vancouver, BC, Canada.,BC Provincial Fire Fighter's Burn and Wound Healing Research Lab, Vancouver, BC, Canada
| | - Breshell Russ
- BC Provincial Fire Fighter's Burn and Wound Healing Research Lab, Vancouver, BC, Canada.,Department of Microbiology and Immunology, Faculty of Science, University of British Columbia, Vancouver, BC, Canada
| | - Ruhangiz Kilani
- Division of Plastic Surgery, Department of Surgery, University of British Columbia, Vancouver, BC, Canada.,BC Provincial Fire Fighter's Burn and Wound Healing Research Lab, Vancouver, BC, Canada
| | - Aziz Ghahary
- Division of Plastic Surgery, Department of Surgery, University of British Columbia, Vancouver, BC, Canada.,BC Provincial Fire Fighter's Burn and Wound Healing Research Lab, Vancouver, BC, Canada
| | - Reza Jalili
- Division of Plastic Surgery, Department of Surgery, University of British Columbia, Vancouver, BC, Canada.,BC Provincial Fire Fighter's Burn and Wound Healing Research Lab, Vancouver, BC, Canada
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Identification of Proteins Differentially Expressed by Adipose-derived Mesenchymal Stem Cells Isolated from Immunodeficient Mice. Int J Mol Sci 2019; 20:ijms20112672. [PMID: 31151297 PMCID: PMC6600271 DOI: 10.3390/ijms20112672] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 05/28/2019] [Accepted: 05/28/2019] [Indexed: 12/13/2022] Open
Abstract
Although cell therapy using adipose-derived mesenchymal stem cells (AdMSCs) regulates immunity, the degree to which cell quality and function are affected by differences in immunodeficiency of donors is unknown. We used liquid chromatography tandem-mass spectrometry (LC MS/MS) to identify the proteins expressed by mouse AdMSCs (mAsMSCs) isolated from normal (C57BL/6) mice and mice with severe combined immunodeficiency (SCID). The protein expression profiles of each strain were 98%–100% identical, indicating that the expression levels of major proteins potentially associated with the therapeutic effects of mAdMSCs were highly similar. Further, comparable levels of cell surface markers (CD44, CD90.2) were detected using flow cytometry or LC MS/MS. MYH9, ACTN1, CANX, GPI, TPM1, EPRS, ITGB1, ANXA3, CNN2, MAPK1, PSME2, CTPS1, OTUB1, PSMB6, HMGB1, RPS19, SEC61A1, CTNNB1, GLO1, RPL22, PSMA2, SYNCRIP, PRDX3, SAMHD1, TCAF2, MAPK3, RPS24, and MYO1E, which are associated with immunity, were expressed at higher levels by the SCID mAdMSCs compared with the C57BL/6 mAdMSCs. In contrast, ANXA9, PCBP2, LGALS3, PPP1R14B, and PSMA6, which are also associated with immunity, were more highly expressed by C57BL/6 mAdMSCs than SCID mAdMSCs. These findings implicate these two sets of proteins in the pathogenesis and maintenance of immunodeficiency.
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A Liquid Chromatography with Tandem Mass Spectrometry-Based Proteomic Analysis of Primary Cultured Cells and Subcultured Cells Using Mouse Adipose-Derived Mesenchymal Stem Cells. Stem Cells Int 2019; 2019:7274057. [PMID: 30805011 PMCID: PMC6362508 DOI: 10.1155/2019/7274057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 09/27/2018] [Accepted: 10/17/2018] [Indexed: 12/25/2022] Open
Abstract
Adipose-derived mesenchymal stem cells (MSC-ATs) are representative cell sources for cell therapy. However, how cell stress resulting from passage influences the MSC-AT protein expression has been unclear. In this study, a protein expression analysis was performed by liquid chromatography with tandem mass spectrometry (LC-MS/MS) using mouse primary cultured cells (P0) and cells passaged three times (P3) as samples. A total of 256 proteins were classified as cellular process-related proteins, while 179 were classified as metabolic process-related proteins in P0. These were considered to be adaptive responses of the cells to an in vitro environment. However, seven proteins of growth were identified (Csf1, App, Adam15, Alcam, Tbl1xr1, Ninj1, and Sbds) in P0. In addition, four proteins of antioxidant activity were also identified (Srxn1, Txndc17, Fam213b, and Apoe) in P0. We identified 1139 proteins expressed in both P0 and P3 cells that had their expression decreased to 69.4% in P3 cells compared with P0 cells, but 1139 proteins are very likely proteins that are derived from MSC-AT. The function of MSC-ATs was maintained after three passages. However, the LC-MS/MS analysis data showed that the protein expression was degraded after three passages. MSC-ATs retained about 70% of their protein expression ability in P3 cells.
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Nahar S, Nakashima Y, Miyagi-Shiohira C, Kinjo T, Toyoda Z, Kobayashi N, Saitoh I, Watanabe M, Noguchi H, Fujita J. Cytokines in adipose-derived mesenchymal stem cells promote the healing of liver disease. World J Stem Cells 2018; 10:146-159. [PMID: 30631390 PMCID: PMC6325075 DOI: 10.4252/wjsc.v10.i11.146] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 09/07/2018] [Accepted: 10/11/2018] [Indexed: 02/06/2023] Open
Abstract
Adipose-derived mesenchymal stem cells (ADSCs) are a treatment cell source for patients with chronic liver injury. ADSCs are characterized by being harvested from the patient's own subcutaneous adipose tissue, a high cell yield (i.e., reduced immune rejection response), accumulation at a disease nidus, suppression of excessive immune response, production of various growth factors and cytokines, angiogenic effects, anti-apoptotic effects, and control of immune cells via cell-cell interaction. We previously showed that conditioned medium of ADSCs promoted hepatocyte proliferation and improved the liver function in a mouse model of acute liver failure. Furthermore, as found by many other groups, the administration of ADSCs improved liver tissue fibrosis in a mouse model of liver cirrhosis. A comprehensive protein expression analysis by liquid chromatography with tandem mass spectrometry showed that the various cytokines and chemokines produced by ADSCs promote the healing of liver disease. In this review, we examine the ability of expressed protein components of ADSCs to promote healing in cell therapy for liver disease. Previous studies demonstrated that ADSCs are a treatment cell source for patients with chronic liver injury. This review describes the various cytokines and chemokines produced by ADSCs that promote the healing of liver disease.
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Affiliation(s)
- Saifun Nahar
- Department of Infectious, Respiratory, and Digestive Medicine, Graduate School of Medicine, University of the Ryukyus, Okinawa 903-0215, Japan
| | - Yoshiki Nakashima
- Department of Regenerative Medicine, Graduate School of Medicine, University of the Ryukyus, Okinawa 903-0215, Japan
| | - Chika Miyagi-Shiohira
- Department of Regenerative Medicine, Graduate School of Medicine, University of the Ryukyus, Okinawa 903-0215, Japan
| | - Takao Kinjo
- Department of Basic Laboratory Sciences, School of Health Sciences in the Faculty of Medicine, University of the Ryukyus, Okinawa 903-0215, Japan
| | - Zensei Toyoda
- Department of Basic Laboratory Sciences, School of Health Sciences in the Faculty of Medicine, University of the Ryukyus, Okinawa 903-0215, Japan
| | | | - Issei Saitoh
- Division of Pediatric Dentistry, Graduate School of Medical and Dental Science, Niigata University, Niigata 951-8514, Japan
| | - Masami Watanabe
- Department of Urology, Okayama Univer sity Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Hirofumi Noguchi
- Department of Regenerative Medicine, Graduate School of Medicine, University of the Ryukyus, Okinawa 903-0215, Japan.
| | - Jiro Fujita
- Department of Infectious, Respiratory, and Digestive Medicine, Graduate School of Medicine, University of the Ryukyus, Okinawa 903-0215, Japan
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