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Allogeneic non-adherent bone marrow cells facilitate hematopoietic recovery but do not lead to allogeneic engraftment

 
: Fricke, Stephan; Ackermann, Manuela; Stolzing, Alexandra; Schimmelpfennig, Christoph; Hilger, Nadja; Jahns, Jutta; Hildebrandt, Guido; Emmrich, Frank; Ruschpler, Peter; Pösel, Claudia; Kamprad, Manja; Sack, Ulrich

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Volltext ()

PLoS one. Online journal 4 (2009), Nr.7, Art. e6157, 11 S.
http://www.pubmedcentral.nih.gov/tocrender.fcgi?action=archive&journal=440
ISSN: 1932-6203
Englisch
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IZI ()

Abstract
Background
Non adherent bone marrow derived cells (NA-BMCs) have recently been described to give rise to multiple mesenchymal phenotypes and have an impact in tissue regeneration. Therefore, the effects of murine bone marrow derived NA-BMCs were investigated with regard to engraftment capacities in allogeneic and syngeneic stem cell transplantation using transgenic, human CD4+, murine CD4?/?, HLA-DR3+ mice.
Methodology/Principal Findings
Bone marrow cells were harvested from C57Bl/6 and Balb/c wild-type mice, expanded to NA-BMCs for 4 days and characterized by flow cytometry before transplantation in lethally irradiated recipient mice. Chimerism was detected using flow cytometry for MHC-I (H-2D[b], H-2K[d]), mu/huCD4, and huHLA-DR3). Culturing of bone marrow cells in a dexamethasone containing DMEM medium induced expansion of non adherent cells expressing CD11b, CD45, and CD90. Analysis of the CD45+ showed depletion of CD4+, CD8+, CD19+, and CD117+ cells. Expanded syngeneic and allogeneic NA-BMCs were transplanted into triple transgenic mice. Syngeneic NA-BMCs protected 83% of mice from death (n = 8, CD4+ donor chimerism of 5.8±2.4% [day 40], P.001). Allogeneic NA-BMCs preserved 62.5% (n = 8) of mice from death without detectable hematopoietic donor chimerism. Transplantation of syngeneic bone marrow cells preserved 100%, transplantation of allogeneic bone marrow cells 33% of mice from death.
Conclusions/Significance
NA-BMCs triggered endogenous hematopoiesis and induced faster recovery compared to bone marrow controls. These findings may be of relevance in the refinement of strategies in the treatment of hematological malignancies.

: http://publica.fraunhofer.de/dokumente/N-103983.html