Extended survival versus accelerated rejection of nonhuman primate islet allografts: Effect of mesenchymal stem cell source and timing

Mesenchymal stem cells (MSC) have been shown to be immunomodulatory, tissue regenerative, and graft promoting; however, several questions remain with regard to ideal MSC source and timing of administration. In this study, we utilized a rigorous preclinical model of allogeneic islet cell transplantat...

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Veröffentlicht in:American journal of transplantation 2021-11, Vol.21 (11), p.3524-3537
Hauptverfasser: Kenyon, Norma S., Willman, Melissa A., Han, Dongmei, Leeman, Rachel S., Rabassa, Alex, Diaz, Waldo L., Geary, James C., Poumian‐Ruiz, Ena, Griswold, Anthony J., Van Booven, Derek J., Thompson, Ryan, Ordoukhanian, Philip, Head, Steven R., Kenyon, Norman M., McHenry, Kenton G., Salomon, Daniel R., Bartholomew, Amelia M., Berman, Dora M.
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container_end_page 3537
container_issue 11
container_start_page 3524
container_title American journal of transplantation
container_volume 21
creator Kenyon, Norma S.
Willman, Melissa A.
Han, Dongmei
Leeman, Rachel S.
Rabassa, Alex
Diaz, Waldo L.
Geary, James C.
Poumian‐Ruiz, Ena
Griswold, Anthony J.
Van Booven, Derek J.
Thompson, Ryan
Ordoukhanian, Philip
Head, Steven R.
Kenyon, Norman M.
McHenry, Kenton G.
Salomon, Daniel R.
Bartholomew, Amelia M.
Berman, Dora M.
description Mesenchymal stem cells (MSC) have been shown to be immunomodulatory, tissue regenerative, and graft promoting; however, several questions remain with regard to ideal MSC source and timing of administration. In this study, we utilized a rigorous preclinical model of allogeneic islet cell transplantation, incorporating reduced immune suppression and near to complete mismatch of major histocompatibility antigens between the diabetic cynomolgus monkey recipient and the islet donor, to evaluate both the graft promoting impact of MSC source, that is, derived from the islet recipient, the islet donor or an unrelated third party as well as the impact of timing. Co‐transplant of MSC and islets on post‐operative day 0, followed by additional IV MSC infusions in the first posttransplant month, resulted in prolongation of rejection free and overall islet survival and superior metabolic control for animals treated with recipient as compared to donor or third‐party MSC. Immunological analyses demonstrated that infusion of MSC from either source did not prevent alloantibody formation to the islet or MSC donor; however, treatment with recipient MSC resulted in significant downregulation of memory T cells, decreased anti‐donor T cell proliferation, and a trend toward increased Tregulatory:Tconventional ratios. Intrahepatic cotransplantation of islet and recipient‐derived, compared to donor‐ or third party‐derived mesenchymal stem cells, followed by additional mesenchymal stem cell infusions in the first posttransplant month, prolongs overall and rejection‐free islet survival and superior metabolic control.
doi_str_mv 10.1111/ajt.16693
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subjects Alloantibodies
Allografts
Animals
Antigens
Cell proliferation
Clinical outcomes
Diabetes mellitus
Graft rejection
Histocompatibility
Immune system
Immunological memory
Immunomodulation
Islet cells
Islets of Langerhans Transplantation
Lymphocytes T
Macaca fascicularis
Memory cells
Mesenchymal Stem Cells
Pancreatic islet transplantation
Stem cell transplantation
Stem cells
Transplantation, Homologous
title Extended survival versus accelerated rejection of nonhuman primate islet allografts: Effect of mesenchymal stem cell source and timing
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