Immunosuppressive properties of human umbilical cord‐derived mesenchymal stem cells: role of B7‐H1 and IDO

Umbilical cord is a rich source of mesenchymal stromal or stem cells (MSCs) that can be used for developing allogeneic cell therapy to treat intractable diseases. In this report, we present evidence that umbilical cord‐derived MSCs (UCMSCs) possess important immunomodulatory properties that may enab...

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Veröffentlicht in:Immunology and cell biology 2010-11, Vol.88 (8), p.795-806
Hauptverfasser: Tipnis, Shabari, Viswanathan, Chandra, Majumdar, Anish S
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Viswanathan, Chandra
Majumdar, Anish S
description Umbilical cord is a rich source of mesenchymal stromal or stem cells (MSCs) that can be used for developing allogeneic cell therapy to treat intractable diseases. In this report, we present evidence that umbilical cord‐derived MSCs (UCMSCs) possess important immunomodulatory properties that may enable them to survive in an allogeneic environment. UCMSCs do not express human leukocyte antigen (HLA)‐DR and co‐stimulatory molecules CD80 and CD86 that are required for T‐cell activation. More importantly, UCMSCs constitutively express a negative regulator of T‐cell activation, B7‐H1, and its expression is increased after interferon‐γ (IFN‐γ) treatment. In addition, IFN‐γ treatment induced indoleamine 2,3‐dioxygenase (IDO) and HLA‐DR expression in UCMSCs. Neither control nor IFN‐γ‐treated UCMSCs stimulated allogeneic T‐cell proliferation, and both cell populations inhibited third‐party dendritic cell (DC)‐mediated allostimulatory activity. Addition of a B7‐H1‐specific blocking antibody or an IDO inhibitor, 1 methyl tryptophan (1‐MT) abrogated the T‐cell immunosuppressive activity of these cells. Furthermore, UCMSCs prevented the differentiation and maturation of peripheral blood monocyte‐derived DCs, and augmented the generation of regulatory T cells (Tregs) in culture. The immunosuppressive effects of UCMSCs are largely mediated by cell‐to‐cell contact, although some inhibitory activity was observed with cell‐free supernatant. Our study suggests that these immunomodulatory properties of UCMSCs could potentially improve the outcome of allogeneic stem cell therapy.
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subjects Antibodies, Blocking - pharmacology
Antigens, CD - immunology
Antigens, CD - metabolism
B7-H1 Antigen
B7‐H1
Cell Communication - immunology
Cell Differentiation - drug effects
Cell Proliferation - drug effects
Cells, Cultured
Dendritic Cells - metabolism
Dendritic Cells - pathology
Fetal Blood - cytology
HLA-DR Antigens - genetics
HLA-DR Antigens - metabolism
Humans
Immune Tolerance - drug effects
indoleamine 2,3‐dioxygenase
Indoleamine-Pyrrole 2,3,-Dioxygenase - genetics
Indoleamine-Pyrrole 2,3,-Dioxygenase - metabolism
Interferon-gamma - immunology
Interferon-gamma - metabolism
Lymphocyte Activation
Lymphocyte Culture Test, Mixed
mesenchymal stem cells
Mesenchymal Stromal Cells - cytology
Mesenchymal Stromal Cells - drug effects
Mesenchymal Stromal Cells - immunology
Mesenchymal Stromal Cells - metabolism
T-Lymphocytes, Regulatory - metabolism
T-Lymphocytes, Regulatory - pathology
Tryptophan - analogs & derivatives
Tryptophan - pharmacology
T‐cell immunosuppression
umbilical cord
title Immunosuppressive properties of human umbilical cord‐derived mesenchymal stem cells: role of B7‐H1 and IDO
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