title: Clinical scale expanded adult pluripotent stem cells prevent graft-versus-host disease.
abstract: Adherent bone marrow adult stem cells have been used in the treatment of GVHD. In this study, we investigate the capacity of a newly characterized population of stem cells, the Multipotent Adult Progenitor Cells (MAPC), to modulate acute GVHD. These cells were derived from bone marrow cells and grown extensively without evidence for replicative senescence or loss of differentiating capacity. MAPC significantly decreased mortality of acute GVHD. Moreover, they were non immunogenic and they were not sensitive to NK-lysis. When these cells were added to a mixed lymphocyte reaction (MLR), a dose-dependent suppression of T cell proliferation was observed that was non-MHC restricted, was reversible upon removal of MAPC from culture and was mediated by soluble factors. These data show that in vitro expanded adult stem cells can efficiently control an allo-reactive response associated with acute GVHD, that they are immuno-privileged and present strong immunosuppressive properties.
authors.affiliation: Center for Hematologic Malignancies, OHSU Cancer Institute, 3181 SW Sam Jackson Park Rd, Portland, OR 97201, USA. kovacsom@ohsu.edu
authors.forename: Magdalena
authors.initials: M
authors.lastname: Kovacsovics-Bankowski
authors.forename: Philip R
authors.initials: PR
authors.lastname: Streeter
authors.forename: Kelsey A
authors.initials: KA
authors.lastname: Mauch
authors.forename: Mark R
authors.initials: MR
authors.lastname: Frey
authors.forename: Amy
authors.initials: A
authors.lastname: Raber
authors.forename: Wouter
authors.initials: W
authors.lastname: van't Hof
authors.forename: Robert
authors.initials: R
authors.lastname: Deans
authors.forename: Richard T
authors.initials: RT
authors.lastname: Maziarz
mesh_terms: D000328:Adult; D053687:Adult Stem Cells / Q000166:cytology / Q000502:physiology*; D000818:Animals; D002460:Cell Line; D049109:Cell Proliferation; D006086:Graft vs Host Disease / Q000276:immunology / Q000517:prevention & control; D006801:Humans; D053208:Kaplan-Meier Estimate; D008213:Lymphocyte Activation; D007959:Lymphocyte Culture Test, Mixed; D039902:Multipotent Stem Cells / Q000166:cytology / Q000502:physiology; D039904:Pluripotent Stem Cells / Q000166:cytology / Q000502:physiology*; D051381:Rats; D011915:Rats, Inbred BUF; D011917:Rats, Inbred Lew; D013601:T-Lymphocytes / Q000166:cytology / Q000276:immunology; D014184:Transplantation, Homologous