title: CD133 identifies a human bone marrow stem/progenitor cell sub-population with a repertoire of secreted factors that protect against stroke.
abstract: The reparative properties of bone marrow stromal cells (BMSCs) have been attributed in part to the paracrine action of secreted factors. We isolated typical human BMSCs by plastic adherence and compared them with BMSC sub-populations isolated by magnetic-activated cell sorting against CD133 (CD133-derived BMSCs, CD133BMSCs) or CD271 [p75 low-affinity nerve growth factor receptor (p75LNGFR), p75BMSCs]. Microarray assays of expressed genes, and enzyme-linked immunosorbent assays (ELISAs) of selected growth factors and cytokines secreted under normoxic and hypoxic conditions demonstrated that the three transit-amplifying progenitor cell populations were distinct from one another. CD133BMSC-conditioned medium (CdM) was superior to p75BMSC CdM in protecting neural progenitor cells against cell death during growth factor/nutrient withdrawal. Intracardiac (arterial) administration of concentrated CD133BMSC CdM provided neuroprotection and significantly reduced cortical infarct volumes in mice following cerebral ischemia. In support of the paracrine hypothesis for BMSC action, intra-arterial infusion of CD133BMSC CdM provided significantly greater protection against stroke compared with the effects of CD133BMSC (cell) administration. CdM from CD133BMSCs also provided superior protection against stroke compared with that conferred by CdM from p75BMSCs or typically isolated BMSCs. CD133 identifies a sub-population of nonhematopoietic stem/progenitor cells from adult human bone marrow, and CD133BMSC CdM may provide neuroprotection for patients with stroke.
authors.affiliation: Department of Medicine, Stem Cell Core, University of Vermont, Colchester, Vermont 05446, USA.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Bakondi
authors.forename: Issei S
authors.initials: IS
authors.lastname: Shimada
authors.forename: Anthony
authors.initials: A
authors.lastname: Perry
authors.forename: James R
authors.initials: JR
authors.lastname: Munoz
authors.forename: Joni
authors.initials: J
authors.lastname: Ylostalo
authors.forename: Alan B
authors.initials: AB
authors.lastname: Howard
authors.forename: Carl A
authors.initials: CA
authors.lastname: Gregory
authors.forename: Jeffrey L
authors.initials: JL
authors.lastname: Spees
mesh_terms: D000071916:AC133 Antigen; D015703:Antigens, CD / Q000378:metabolism*; D001854:Bone Marrow Cells / Q000166:cytology / Q000378:metabolism*; D002545:Brain Ischemia / Q000517:prevention & control*; D002454:Cell Differentiation / Q000502:physiology; D015687:Cell Hypoxia / Q000502:physiology; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D017077:Culture Media, Conditioned / Q000737:chemistry / Q000494:pharmacology; D016207:Cytokines / Q000378:metabolism; D004797:Enzyme-Linked Immunosorbent Assay; D005434:Flow Cytometry; D006023:Glycoproteins / Q000378:metabolism*; D006801:Humans; D036341:Intercellular Signaling Peptides and Proteins / Q000378:metabolism; D020411:Oligonucleotide Array Sequence Analysis; D010455:Peptides / Q000378:metabolism*; D020521:Stroke / Q000517:prevention & control*
chemical_list: D000071916:AC133 Antigen; D015703:Antigens, CD; D017077:Culture Media, Conditioned; D016207:Cytokines; D006023:Glycoproteins; D036341:Intercellular Signaling Peptides and Proteins; C000606023:PROM1 protein, human; D010455:Peptides; C000606024:Prom1 protein, mouse
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