Evaluation of immunosuppression protocols for MHC-matched allogeneic iPS cell-based transplantation using a mouse skin transplantation model

Abstract Background Off-the-shelf major histocompatibility complex (MHC)-matched iPS cells (iPSC) can potentially initiate host immune responses because of the existence of numerous minor antigens. To suppress allo-immune responses, combination of immunosuppressants is usually used, but its efficacy...

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Main Authors: Tomoki Kamatani, Ryo Otsuka, Tomoki Murata, Haruka Wada, Takeshi Takahashi, Akihiro Mori, Soichiro Murata, Hideki Taniguchi, Ken-ichiro Seino
Format: Article
Language:English
Published: BMC 2022-02-01
Series:Inflammation and Regeneration
Subjects:
Online Access:https://doi.org/10.1186/s41232-021-00190-7
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author Tomoki Kamatani
Ryo Otsuka
Tomoki Murata
Haruka Wada
Takeshi Takahashi
Akihiro Mori
Soichiro Murata
Hideki Taniguchi
Ken-ichiro Seino
author_facet Tomoki Kamatani
Ryo Otsuka
Tomoki Murata
Haruka Wada
Takeshi Takahashi
Akihiro Mori
Soichiro Murata
Hideki Taniguchi
Ken-ichiro Seino
author_sort Tomoki Kamatani
collection DOAJ
description Abstract Background Off-the-shelf major histocompatibility complex (MHC)-matched iPS cells (iPSC) can potentially initiate host immune responses because of the existence of numerous minor antigens. To suppress allo-immune responses, combination of immunosuppressants is usually used, but its efficacy to the allogeneic iPSC-based transplantation has not been precisely evaluated. Methods Three transplantation models were used in this study; MHC-matched, minor antigen-mismatched mouse skin or iPSC-graft transplantation, and fully allogeneic human iPSC-derived liver organoid transplantation in immune-humanized mice. The recipients were treated with triple drugs combination (TDC; tacrolimus, methylprednisolone, and mycophenolate mofetil) or co-stimulatory molecule blockade (CB) therapy with some modifications. Graft survival as well as anti-donor T and B cell responses was analyzed. Results In the mouse skin transplantation model, immunological rejection caused by the minor antigen-mismatch ranged from mild to severe according to the donor-recipient combination. The TDC treatment could apparently control the mild skin graft rejection when combined with a transient T cell depletion, but unexpected anti-donor T or B cell response was observed. On the other hand, CB therapy, particularly when combined with rapamycin treatment, was capable of attenuating both mild and severe skin graft rejection and allowing them to survive long-term without any unfavorable anti-donor immune responses. The efficacy of the CB therapy was confirmed in both mouse and human iPSC-derived graft transplantation. Conclusions The findings suggest that the CB-based treatment seems suitable to well manage the MHC-matched allogeneic iPSC-based transplantation. The TDC-based treatment may be also used to suppress the rejection, but screening of its severity prior to the transplantation seems to be needed.
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spelling doaj.art-921a43b21ced413aa7e86b9447892ae72022-12-22T01:34:44ZengBMCInflammation and Regeneration1880-81902022-02-0142111310.1186/s41232-021-00190-7Evaluation of immunosuppression protocols for MHC-matched allogeneic iPS cell-based transplantation using a mouse skin transplantation modelTomoki Kamatani0Ryo Otsuka1Tomoki Murata2Haruka Wada3Takeshi Takahashi4Akihiro Mori5Soichiro Murata6Hideki Taniguchi7Ken-ichiro Seino8Division of Immunobiology, Institute for Genetic Medicine, Hokkaido UniversityDivision of Immunobiology, Institute for Genetic Medicine, Hokkaido UniversityDivision of Immunobiology, Institute for Genetic Medicine, Hokkaido UniversityDivision of Immunobiology, Institute for Genetic Medicine, Hokkaido UniversityCentral Institute for Experimental Animals (CIEA)Department of Regenerative Medicine, Yokohama City University Graduate School of MedicineDepartment of Regenerative Medicine, Yokohama City University Graduate School of MedicineDepartment of Regenerative Medicine, Yokohama City University Graduate School of MedicineDivision of Immunobiology, Institute for Genetic Medicine, Hokkaido UniversityAbstract Background Off-the-shelf major histocompatibility complex (MHC)-matched iPS cells (iPSC) can potentially initiate host immune responses because of the existence of numerous minor antigens. To suppress allo-immune responses, combination of immunosuppressants is usually used, but its efficacy to the allogeneic iPSC-based transplantation has not been precisely evaluated. Methods Three transplantation models were used in this study; MHC-matched, minor antigen-mismatched mouse skin or iPSC-graft transplantation, and fully allogeneic human iPSC-derived liver organoid transplantation in immune-humanized mice. The recipients were treated with triple drugs combination (TDC; tacrolimus, methylprednisolone, and mycophenolate mofetil) or co-stimulatory molecule blockade (CB) therapy with some modifications. Graft survival as well as anti-donor T and B cell responses was analyzed. Results In the mouse skin transplantation model, immunological rejection caused by the minor antigen-mismatch ranged from mild to severe according to the donor-recipient combination. The TDC treatment could apparently control the mild skin graft rejection when combined with a transient T cell depletion, but unexpected anti-donor T or B cell response was observed. On the other hand, CB therapy, particularly when combined with rapamycin treatment, was capable of attenuating both mild and severe skin graft rejection and allowing them to survive long-term without any unfavorable anti-donor immune responses. The efficacy of the CB therapy was confirmed in both mouse and human iPSC-derived graft transplantation. Conclusions The findings suggest that the CB-based treatment seems suitable to well manage the MHC-matched allogeneic iPSC-based transplantation. The TDC-based treatment may be also used to suppress the rejection, but screening of its severity prior to the transplantation seems to be needed.https://doi.org/10.1186/s41232-021-00190-7iPS cell transplantationTransplantation immunologyMHC-matchedMinor antigenImmunosuppressive agentsCostimulatory molecule blockade
spellingShingle Tomoki Kamatani
Ryo Otsuka
Tomoki Murata
Haruka Wada
Takeshi Takahashi
Akihiro Mori
Soichiro Murata
Hideki Taniguchi
Ken-ichiro Seino
Evaluation of immunosuppression protocols for MHC-matched allogeneic iPS cell-based transplantation using a mouse skin transplantation model
Inflammation and Regeneration
iPS cell transplantation
Transplantation immunology
MHC-matched
Minor antigen
Immunosuppressive agents
Costimulatory molecule blockade
title Evaluation of immunosuppression protocols for MHC-matched allogeneic iPS cell-based transplantation using a mouse skin transplantation model
title_full Evaluation of immunosuppression protocols for MHC-matched allogeneic iPS cell-based transplantation using a mouse skin transplantation model
title_fullStr Evaluation of immunosuppression protocols for MHC-matched allogeneic iPS cell-based transplantation using a mouse skin transplantation model
title_full_unstemmed Evaluation of immunosuppression protocols for MHC-matched allogeneic iPS cell-based transplantation using a mouse skin transplantation model
title_short Evaluation of immunosuppression protocols for MHC-matched allogeneic iPS cell-based transplantation using a mouse skin transplantation model
title_sort evaluation of immunosuppression protocols for mhc matched allogeneic ips cell based transplantation using a mouse skin transplantation model
topic iPS cell transplantation
Transplantation immunology
MHC-matched
Minor antigen
Immunosuppressive agents
Costimulatory molecule blockade
url https://doi.org/10.1186/s41232-021-00190-7
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