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Blood, 15 March 2006, Vol. 107, No. 6, pp. 2570-2577. Prepublished online as a Blood First Edition Paper on November 17, 2005; DOI 10.1182/blood-2005-07-2793. This Article Full Text Full Text (PDF) Supplemental Figures All Versions of this Article: 2005-07-2793v1 107/6/2570    most recent Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Rights and Permissions Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Stagg, J. Articles by Galipeau, J. Search for Related Content PubMed PubMed Citation Articles by Stagg, J. Articles by Galipeau, J. Related Collections Immunobiology Transplantation Social Bookmarking                   What's this?  Previous Article  |  Table of Contents  |  Next Article  TRANSPLANTATION Interferon--stimulated marrow stromal cells: a new type of nonhematopoietic antigen-presenting cell John Stagg, Sandra Pommey, Nicoletta Eliopoulos, and Jacques Galipeau From the Lady Davis Institute for Medical Research; and Division of Hematology/Oncology, Jewish General Hospital; McGill University, Montreal, QC, Canada. Several studies have demonstrated that marrow stromal cells (MSCs) can suppress allogeneic T-cell responses. However, the effect of MSCs on syngeneic immune responses has been largely overlooked. We describe here that primary MSCs derived from C57BL/6 mice behave as conditional antigen-presenting cells (APCs) and can induce antigen-specific protective immunity. Interferon gamma (IFN)-treated C57BL/6 MSCs, but not unstimulated MSCs, cocultured with ovalbumin-specific major histocompatibility (MHC) class II-restricted hybridomas in the presence of soluble ovalbumin-induced significant production of interleukin-2 (IL-2) in an antigen dose-dependent manner (P < .005). IFN-treated MSCs could further activate in vitro ovalbumin-specific primary transgenic CD4+ T cells. C57BL/6 MSCs, however, were unable to induce antigen cross-presentation via the MHC class I pathway. When syngeneic mice were immunized intraperitoneally with ovalbumin-pulsed IFN-treated MSCs, they developed antigen-specific cytotoxic CD8+ T cells and became fully protected (10 of 10 mice) against ovalbumin-expressing E.G7 tumors. Human MSCs were also studied for antigen-presenting functions. IFN-treated DR1-positive human MSCs, but not unstimulated human MSCs, induced significant production of IL-2 when cocultured with DR1-restricted influenza-specific humanized T-cell hybridomas in the presence of purified influenza matrix protein 1. Taken together, our data strongly suggest that MSCs behave as conditional APCs in syngeneic immune responses. (Blood. 2006;107:2570-2577) CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this? This article has been cited by other articles: P. M. Campeau, M. Rafei, M.-N. Boivin, Y. Sun, G. A. Grabowski, and J. Galipeau Characterization of Gaucher disease bone marrow mesenchymal stromal cells reveals an altered inflammatory secretome Blood, October 8, 2009; 114(15): 3181 - 3190. [Abstract] [Full Text] [PDF] M. Francois, R. Romieu-Mourez, S. Stock-Martineau, M.-N. Boivin, J. L. Bramson, and J. 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