PMID- 17932417 OWN - NLM STAT- MEDLINE DCOM- 20080325 LR - 20220419 IS - 1549-4918 (Electronic) IS - 1066-5099 (Linking) VI - 26 IP - 1 DP - 2008 Jan TI - Human leukocyte antigen-G5 secretion by human mesenchymal stem cells is required to suppress T lymphocyte and natural killer function and to induce CD4+CD25highFOXP3+ regulatory T cells. PG - 212-22 AB - Adult bone marrow-derived mesenchymal stem cells (MSCs) are multipotent cells that are the subject of intense investigation in regenerative medicine. In addition, MSCs possess immunomodulatory properties with therapeutic potential to prevent graft-versus-host disease (GvHD) in allogeneic hematopoietic cell transplantation. Indeed, MSCs can inhibit natural killer (NK) function, modulate dendritic cell maturation, and suppress allogeneic T-cell response. Here, we report that the nonclassic human leukocyte antigen (HLA) class I molecule HLA-G is responsible for the immunomodulatory properties of MSCs. Our data show that MSCs secrete the soluble isoform HLA-G5 and that such secretion is interleukin-10-dependent. Moreover, cell contact between MSCs and allostimulated T cells is required to obtain a full HLA-G5 secretion and, as consequence, a full immunomodulation from MSCs. Blocking experiments using neutralizing anti-HLA-G antibody demonstrate that HLA-G5 contributes first to the suppression of allogeneic T-cell proliferation and then to the expansion of CD4(+)CD25(high)FOXP3(+) regulatory T cells. Furthermore, we demonstrate that in addition to their action on the adaptive immune system, MSCs, through HLA-G5, affect innate immunity by inhibiting both NK cell-mediated cytolysis and interferon-gamma secretion. Our results provide evidence that HLA-G5 secreted by MSCs is critical to the suppressive functions of MSCs and should contribute to improving clinical therapeutic trials that use MSCs to prevent GvHD. FAU - Selmani, Zohair AU - Selmani Z AD - Institut National de la Sante et de la Recherche Medicale U645, IFR 133, Universite de Franche-Comte, Etablissement Francais du Sang Bourgogne-Franche-Comte, Besancon, France. FAU - Naji, Abderrahim AU - Naji A FAU - Zidi, Ines AU - Zidi I FAU - Favier, Benoit AU - Favier B FAU - Gaiffe, Emilie AU - Gaiffe E FAU - Obert, Laurent AU - Obert L FAU - Borg, Christophe AU - Borg C FAU - Saas, Philippe AU - Saas P FAU - Tiberghien, Pierre AU - Tiberghien P FAU - Rouas-Freiss, Nathalie AU - Rouas-Freiss N FAU - Carosella, Edgardo D AU - Carosella ED FAU - Deschaseaux, Frederic AU - Deschaseaux F LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20071011 PL - England TA - Stem Cells JT - Stem cells (Dayton, Ohio) JID - 9304532 RN - 0 (CD4 Antigens) RN - 0 (FOXP3 protein, human) RN - 0 (Forkhead Transcription Factors) RN - 0 (HLA Antigens) RN - 0 (HLA-G Antigens) RN - 0 (Histocompatibility Antigens Class I) RN - 0 (Interleukin-2 Receptor alpha Subunit) RN - 130068-27-8 (Interleukin-10) RN - 82115-62-6 (Interferon-gamma) SB - IM MH - Adult Stem Cells/cytology/immunology/metabolism MH - Blotting, Western MH - Bone Marrow Cells/cytology/immunology/metabolism MH - CD4 Antigens/metabolism MH - Cell Communication MH - Enzyme-Linked Immunosorbent Assay MH - Flow Cytometry MH - Forkhead Transcription Factors/metabolism MH - HLA Antigens/*metabolism MH - HLA-G Antigens MH - Histocompatibility Antigens Class I/*metabolism MH - Humans MH - Interferon-gamma MH - Interleukin-10 MH - Interleukin-2 Receptor alpha Subunit/metabolism MH - Killer Cells, Natural/immunology/*metabolism MH - Lymphocyte Culture Test, Mixed MH - Mesenchymal Stem Cells/cytology/immunology/*metabolism MH - Microscopy, Confocal MH - Reverse Transcriptase Polymerase Chain Reaction MH - T-Lymphocyte Subsets/immunology/*metabolism MH - T-Lymphocytes, Cytotoxic/immunology/*metabolism MH - T-Lymphocytes, Regulatory/immunology/*metabolism EDAT- 2007/10/13 09:00 MHDA- 2008/03/26 09:00 CRDT- 2007/10/13 09:00 PHST- 2007/10/13 09:00 [pubmed] PHST- 2008/03/26 09:00 [medline] PHST- 2007/10/13 09:00 [entrez] AID - 2007-0554 [pii] AID - 10.1634/stemcells.2007-0554 [doi] PST - ppublish SO - Stem Cells. 2008 Jan;26(1):212-22. doi: 10.1634/stemcells.2007-0554. Epub 2007 Oct 11.