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Cotransplantation With Adipose Tissue-derived Stem Cells Improves Engraftment of Transplanted Hepatocytes. Transplantation 2022; 106:1963-1973. [PMID: 35404871 PMCID: PMC9521584 DOI: 10.1097/tp.0000000000004130] [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] [Indexed: 02/04/2023]
Abstract
BACKGROUND Hepatocyte transplantation is expected to be an alternative therapy to liver transplantation; however, poor engraftment is a severe obstacle to be overcome. The adipose tissue-derived stem cells (ADSCs) are known to improve engraftment of transplanted pancreatic islets, which have many similarities to the hepatocytes. Therefore, we examined the effects and underlying mechanisms of ADSC cotransplantation on hepatocyte engraftment. METHODS Hepatocytes and ADSCs were cotransplanted into the renal subcapsular space and livers of syngeneic analbuminemic rats, and the serum albumin level was quantified to evaluate engraftment. Immunohistochemical staining and fluorescent staining to trace transplanted cells in the liver were also performed. To investigate the mechanisms, cocultured supernatants were analyzed by a multiplex assay and inhibition test using neutralizing antibodies for target factors. RESULTS Hepatocyte engraftment at both transplant sites was significantly improved by ADSC cotransplantation ( P < 0.001, P < 0.001). In the renal subcapsular model, close proximity between hepatocytes and ADSCs was necessary to exert this effect. Unexpectedly, ≈50% of transplanted hepatocytes were attached by ADSCs in the liver. In an in vitro study, the hepatocyte function was significantly improved by ADSC coculture supernatant ( P < 0.001). The multiplex assay and inhibition test demonstrated that hepatocyte growth factor, vascular endothelial growth factor, and interleukin-6 may be key factors for the abovementioned effects of ADSCs. CONCLUSIONS The present study revealed that ADSC cotransplantation can improve the engraftment of transplanted hepatocytes. This effect may be based on crucial factors, such as hepatocyte growth factor, vascular endothelial growth factor, and interleukin-6, which are secreted by ADSCs.
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Development of a novel method for measuring tissue oxygen pressure to improve the hypoxic condition in subcutaneous islet transplantation. Sci Rep 2022; 12:14731. [PMID: 36042259 PMCID: PMC9427780 DOI: 10.1038/s41598-022-19189-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 08/25/2022] [Indexed: 11/08/2022] Open
Abstract
Subcutaneous tissue is a promising site for islet transplantation, but poor engraftment, due to hypoxia and low vascularity, hinders its prevalence. However, oxygen partial pressure (pO2) of the subcutaneous space (SC) and other sites were reported to be equivalent in several previous reports. This contradiction may be based on accidental puncture to the indwelling micro-vessels in target tissues. We therefore developed a novel optical sensor system, instead of a conventional Clark-type needle probe, for measuring tissue pO2 and found that pO2 of the SC was extremely low in comparison to other sites. To verify the utility of this method, we transplanted syngeneic rat islets subcutaneously into diabetic recipients under several oxygenation conditions using an oxygen delivery device, then performed pO2 measurement, glucose tolerance, and immunohistochemistry. The optical sensor system was validated by correlating the pO2 values with the transplanted islet function. Interestingly, this novel technique revealed that islet viability estimated by ATP/DNA assay reduced to less than 75% by hypoxic condition at the SC, indicating that islet engraftment may substantially improve if the pO2 levels reach those of the renal subcapsular space. Further refinements for a hypoxic condition using the present technique may contribute to improving the efficiency of subcutaneous islet transplantation.
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Mouré A, Bacou E, Bosch S, Jegou D, Salama A, Riochet D, Gauthier O, Blancho G, Soulillou J, Poncelet D, Olmos E, Bach J, Mosser M. Extracellular hemoglobin combined with an O
2
‐generating material overcomes O
2
limitation in the bioartificial pancreas. Biotechnol Bioeng 2019; 116:1176-1189. [DOI: 10.1002/bit.26913] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 12/05/2018] [Accepted: 12/26/2018] [Indexed: 12/29/2022]
Affiliation(s)
- Anne Mouré
- Immuno-Endocrinology Unit (IECM), Oniris, INRA, Université Bretagne LoireNantes France
| | - Elodie Bacou
- Immuno-Endocrinology Unit (IECM), Oniris, INRA, Université Bretagne LoireNantes France
| | - Steffi Bosch
- Immuno-Endocrinology Unit (IECM), Oniris, INRA, Université Bretagne LoireNantes France
| | - Dominique Jegou
- Immuno-Endocrinology Unit (IECM), Oniris, INRA, Université Bretagne LoireNantes France
| | - Apolline Salama
- Immuno-Endocrinology Unit (IECM), Oniris, INRA, Université Bretagne LoireNantes France
- Centre de Recherche en Transplantation et Immunologie UMR 1064INSERM, Université de NantesNantes France
| | - David Riochet
- Service de Pédiatrie des Maladies ChroniquesCHU de NantesNantes France
| | | | - Gilles Blancho
- Centre de Recherche en Transplantation et Immunologie UMR 1064INSERM, Université de NantesNantes France
- Institut de Transplantation Urologie Néphrologie (ITUN), CHU NantesNantes France
| | - Jean‐Paul Soulillou
- Centre de Recherche en Transplantation et Immunologie UMR 1064INSERM, Université de NantesNantes France
- Institut de Transplantation Urologie Néphrologie (ITUN), CHU NantesNantes France
| | - Denis Poncelet
- Department of Process Engineering for Environment and Food Laboratory (GEPEA)UMR CNRS 6144, OnirisNantes France
| | - Eric Olmos
- Laboratoire Réactions et Génie des Procédés (LRGP)Université de Lorraine, CNRSNancy France
| | - Jean‐Marie Bach
- Immuno-Endocrinology Unit (IECM), Oniris, INRA, Université Bretagne LoireNantes France
| | - Mathilde Mosser
- Immuno-Endocrinology Unit (IECM), Oniris, INRA, Université Bretagne LoireNantes France
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The Optimization of Short-Term Hepatocyte Preservation Before Transplantation. Transplant Direct 2017; 3:e176. [PMID: 28706979 PMCID: PMC5498017 DOI: 10.1097/txd.0000000000000687] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 04/10/2017] [Indexed: 01/15/2023] Open
Abstract
Background No optimal methods for short-term hepatocyte preservation have been established. We have recently developed a prominent oxygen-permeable bag (Tohoku Device [TD]) for pancreatic islet culture and transplantation. In this study, we investigated whether TD is also effective for hepatocyte preservation and tried to optimize other conditions. Methods Hepatocytes were preserved in the following conditions, and their outcomes were observed. First, the effectiveness of TD was investigated. Second, hepatocyte medium (HM) and organ preservation solutions with or without fetal bovine serum (FBS) were compared. Third, as supplementations, FBS and human serum albumin (HSA) were compared. Fourth, low, room and high temperature were compared. And finally, hepatocytes preserved in various conditions were transplanted into the subrenal capsule space of nonalbumin rats and engrafted areas were assessed. Results The survival rate of hepatocytes preserved in TD tended to be higher and their viability and function were maintained significantly greater than those of non-TD group. Irrespective of FBS supplementation, the survival rate of HM group was significantly higher than those of organ preservation solution group while viabilities and plating efficiency were similar among them. Although survival rates of groups without FBS were extremely low, results of HSA supplemented group were not inferior to FBS supplemented group. Hepatocytes preserved at high temperature had the worst results. The engrafted area of TD group tended to be higher than those of other groups. Conclusions TD is effective for short-term hepatocyte preservation. HSA is a useful substitute for FBS, and preserving in HM at low temperature is recommended.
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Gock H, Lee KFE, Murray-Segal L, Mysore TB, d'Apice AJF, Salvaris EJ, Cowan PJ. Human Endothelial Protein C Receptor Overexpression Protects Intraportal Islet Grafts in Mice. Transplant Proc 2016; 48:2200-7. [PMID: 27569971 DOI: 10.1016/j.transproceed.2016.02.080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Accepted: 02/02/2016] [Indexed: 02/06/2023]
Abstract
Islet transplantation can potentially cure type 1 diabetes mellitus, but it is limited by a shortage of human donors as well as by islet graft destruction by inflammatory and thrombotic mechanisms. A possible solution to these problems is to use genetically modified pig islets. Endothelial protein C receptor (EPCR) enhances protein C activation and regulates coagulation, inflammation, and apoptosis. We hypothesized that human EPCR (hEPCR) expression on donor islets would improve graft survival and function. Islets from an hEPCR transgenic mouse line strongly expressed the transgene, and hEPCR expression was maintained after islet isolation. Islets were transplanted from hEPCR mice and wild-type (WT) littermates into diabetic mice in a marginal-dose syngeneic intraportal islet transplantation model. The blood glucose level normalized within 5 days in 5 of 7 recipients of hEPCR islets, compared with only 2 of 7 recipients of WT islets (P < .05). Transplanted hEPCR islets had better preserved morphology and more intense insulin staining than WT grafts, and they retained transgene expression. The improved engraftment compared with WT islets suggests that inflammation and coagulation associated with the transplant process can be reduced by hEPCR expression on donor tissue.
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Affiliation(s)
- H Gock
- Immunology Research Centre, St Vincent's Hospital, Melbourne, Australia; Department of Medicine, University of Melbourne, Melbourne, Australia
| | - K F E Lee
- Immunology Research Centre, St Vincent's Hospital, Melbourne, Australia; Department of Medicine, University of Melbourne, Melbourne, Australia
| | - L Murray-Segal
- Immunology Research Centre, St Vincent's Hospital, Melbourne, Australia
| | - T B Mysore
- Immunology Research Centre, St Vincent's Hospital, Melbourne, Australia; Department of Medicine, University of Melbourne, Melbourne, Australia
| | - A J F d'Apice
- Immunology Research Centre, St Vincent's Hospital, Melbourne, Australia; Department of Medicine, University of Melbourne, Melbourne, Australia
| | - E J Salvaris
- Immunology Research Centre, St Vincent's Hospital, Melbourne, Australia
| | - P J Cowan
- Immunology Research Centre, St Vincent's Hospital, Melbourne, Australia; Department of Medicine, University of Melbourne, Melbourne, Australia.
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Zhu HT, Wang WL, Yu L, Wang B. Pig-islet xenotransplantation: recent progress and current perspectives. Front Surg 2014; 1:7. [PMID: 25593932 PMCID: PMC4287008 DOI: 10.3389/fsurg.2014.00007] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Accepted: 03/07/2014] [Indexed: 01/23/2023] Open
Abstract
Islet xenotransplantation is one prospective treatment to bridge the gap between available human cells and needs of patients with diabetes. Pig represents an ideal candidate for obtaining such available cells. However, potential clinical application of pig islet still faces obstacles including inadequate yield of high-quality functional islets and xenorejection of the transplants. Adequate amounts of available islets can be obtained by selection of a suitable pathogen-free source herd and the development of isolation and purification method. Several studies demonstrated the feasibility of successful preclinical pig-islet xenotransplantation and provided insights and possible mechanisms of xenogeneic immune recognition and rejection. Particularly promising is the achievement of long-term insulin independence in diabetic models by means of distinct islet products and novel immunotherapeutic strategies. Nonetheless, further efforts are needed to obtain much more safety and efficacy data to translate these findings into clinic.
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Affiliation(s)
- Hai-Tao Zhu
- Department of Hepatobiliary Surgery, First Affiliated Hospital, Medical College, Xi’an Jiaotong University, Xi’an, China
| | - Wan-Li Wang
- Department of Hepatobiliary Surgery, First Affiliated Hospital, Medical College, Xi’an Jiaotong University, Xi’an, China
| | - Liang Yu
- Department of Hepatobiliary Surgery, First Affiliated Hospital, Medical College, Xi’an Jiaotong University, Xi’an, China
| | - Bo Wang
- Department of Hepatobiliary Surgery, First Affiliated Hospital, Medical College, Xi’an Jiaotong University, Xi’an, China
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Nishimura R, Nishioka S, Fujisawa I, Shiku H, Shimada M, Sekiguchi S, Fujimori K, Ushiyama A, Matsue T, Ohuchi N, Satomi S, Goto M. Tacrolimus inhibits the revascularization of isolated pancreatic islets. PLoS One 2013; 8:e56799. [PMID: 23613708 PMCID: PMC3629082 DOI: 10.1371/journal.pone.0056799] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Accepted: 01/16/2013] [Indexed: 01/10/2023] Open
Abstract
AIMS Immunosuppressive drugs could be crucial factors for a poor outcome after islet allotransplantation. Unlike rapamycin, the effects of tacrolimus, the current standard immunosuppressant used in islet transplantation, on graft revascularization remain unclear. We examined the effects of tacrolimus on islet revascularization using a highly sensitive imaging system, and analyzed the gene expression in transplanted islets by introducing laser microdissection techniques. METHODS Islets isolated from C57BL/6-Tg (CAG-EGFP) mice were transplanted into the nonmetallic dorsal skinfold chamber on the recipients. Balb/c athymic mice were used as recipients and were divided into two groups: including a control group (n = 9) and tacrolimus-treated group (n = 7). The changes in the newly-formed vessels surrounding the islet grafts were imaged and semi-quantified using multi-photon laser-scanning microscopy and a Volocity system. Gene expression in transplanted islets was analyzed by the BioMark dynamic system. RESULTS The revascularization process was completed within 14 days after pancreatic islet transplantation at subcutaneous sites. The newly-formed vascular volume surrounding the transplanted islets in the tacrolimus-treated group was significantly less than that in the control group (p<0.05). Although the expression of Vegfa (p<0.05) and Ccnd1 (p<0.05) was significantly upregulated in the tacrolimus-treated group compared with that of the control group, no differences were observed between the groups in terms of other types of gene expression. CONCLUSIONS The present study demonstrates that tacrolimus inhibits the revascularization of isolated pancreatic islets without affecting the characteristics of the transplanted grafts. Further refinements of this immunosuppressive regimen, especially regarding the revascularization of islet grafts, could improve the outcome of islet allotransplantation.
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Affiliation(s)
- Ryuichi Nishimura
- Division of Advanced Surgical Science and Technology, Tohoku University, Sendai, Japan
| | - Sho Nishioka
- Graduate School of Environmental Studies, Tohoku University, Sendai, Japan
| | - Ikuma Fujisawa
- Graduate School of Environmental Studies, Tohoku University, Sendai, Japan
| | - Hitoshi Shiku
- Graduate School of Environmental Studies, Tohoku University, Sendai, Japan
| | - Miki Shimada
- Department of Pharmaceutical Sciences, Tohoku University Hospital, Sendai, Japan
| | - Satoshi Sekiguchi
- Division of Advanced Surgical Science and Technology, Tohoku University, Sendai, Japan
| | - Keisei Fujimori
- Division of Advanced Surgical Science and Technology, Tohoku University, Sendai, Japan
| | - Akira Ushiyama
- Department of Environmental Health, National Institute of Public Health, Wako, Japan
| | - Tomokazu Matsue
- WorldPremier InternationalResearch Center Initiative Advanced Institute for Materials Research, Tohoku University, Sendai, Japan
| | - Noriaki Ohuchi
- Division of Advanced Surgical Science and Technology, Tohoku University, Sendai, Japan
| | - Susumu Satomi
- Division of Advanced Surgical Science and Technology, Tohoku University, Sendai, Japan
| | - Masafumi Goto
- Division of Advanced Surgical Science and Technology, Tohoku University, Sendai, Japan
- New Industry Creation Hatchery Center, Tohoku University, Sendai, Japan
- * E-mail:
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Ductal injection does not increase the islet yield or function after cold storage in a vascular perfusion model. PLoS One 2012; 7:e42319. [PMID: 22900012 PMCID: PMC3416830 DOI: 10.1371/journal.pone.0042319] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Accepted: 07/03/2012] [Indexed: 11/19/2022] Open
Abstract
Several studies have reported that pancreatic ductal preservation greatly improved the islet yield and function after cold storage. However, these studies were devoid of appropriate controls, such as vascular perfusion, which is routinely performed to preserve organs in the clinical setting. In this study, we created a vascular perfusion model using inbred rats, and investigated the effect of ductal injection on the islet yield and function after cold storage. Rat pancreases after 10 h cold ischemia were classified as follows: without ductal/vascular perfusion; with ductal injection; with vascular perfusion; and with ductal/vascular perfusion. The islet yield, function, viability, release of inflammatory mediators, and pathological changes in the exocrine tissues were assessed in the Hanks' Balanced Salt Solution (HBSS) model. The islet yield was also assesed by introducing University of Wisconsin Solution (UWS) and Histidine-Tryptophan-Ketoglutarate solution (HTK), which are the standard clinical preservation solutions. In the HBSS model, ductal injection and vascular perfusion significantly improved the islet yield compared with the control group. However, ductal injection showed no additional effects on the islet yield, function, viability and suppressing the release of inflammatory mediators when vascular perfusion was performed. Although ductal injection significantly decreased the apoptosis of exocrine cells, no beneficial effect on vacuolation was observed. In contrast, vascular perfusion significantly suppressed vacuolation in the exocrine tissues. Likewise, in the UWS and HTK model, ductal injection and vascular perfusion improved the islet yield compared with the control group. Nevertheless, the combination group showed no additional effects. These data suggest that ductal injection has no additional effect on islet yield and function after cold storage in a vascular perfusion model. We propose that ductal injection can be an effective and simple alternative for vascular perfusion prior to pancreas harvest, but is not necessary in most cases, since vascular perfusion is routinely performed.
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Current world literature. Curr Opin Organ Transplant 2011; 16:650-60. [PMID: 22068023 DOI: 10.1097/mot.0b013e32834dd969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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