title: Lipoaspirate-derived adult mesenchymal stem cells improve functional outcome during intracerebral hemorrhage by proliferation of endogenous progenitor cells stem cells in intracerebral hemorrhages.
abstract: Stem cell therapy seems promising in reducing deficits after focal cerebral ischemia. As stroke may result from intracerebral hemorrhage (ICH) in up to 20% we investigated whether human processed lipoaspirate mesenchymal stem cells (PLA-MSC) influence the functional outcome, migration behavior and the activation of endogenous progenitor cells. Experimental ICH was induced by stereotactic administration of collagenase in rats randomly assigned to the control or treatment group. The latter received 3 x 10(6) PLA-MSC by intravenous (i.v.) injection 24h after ICH induction. The outcome was continuously monitored using the RotaRod test over a period of 4 weeks. Morphometric analysis of ICH was performed consecutively by magnetic resonance imaging (MRI) studies and immunohistochemical analysis. The RotaRod test revealed a significant 1.5-fold improvement (p<0.005) in functional outcome for the PLA-MSC treated group after 4 weeks compared to controls. Histological and MRI assessment of lesion size showed no difference between the two groups. Although i.v. injected human cells could not be detected in the post mortem brain, evaluation of the number of endogenous progenitor cells revealed a twofold increase in the treated animals compared to controls. Treatment with PLA-MSC improved the functional outcome significantly in an experimental ICH model. This effect was achieved by stimulation of endogenous progenitor cells rather than integration and differentiation of the infused PLA-MSC.
authors.affiliation: Department of Neurology, Universitätsklinikum Mannheim, University of Heidelberg, Germany. m.fatar@neuro.ma.uni-heidelberg.de
authors.forename: Marc
authors.initials: M
authors.lastname: Fatar
authors.forename: Mark
authors.initials: M
authors.lastname: Stroick
authors.forename: Martin
authors.initials: M
authors.lastname: Griebe
authors.forename: Irma
authors.initials: I
authors.lastname: Marwedel
authors.forename: Susanne
authors.initials: S
authors.lastname: Kern
authors.forename: Karen
authors.initials: K
authors.lastname: Bieback
authors.forename: Frederik L
authors.initials: FL
authors.lastname: Giesel
authors.forename: Christian
authors.initials: C
authors.lastname: Zechmann
authors.forename: Stefan
authors.initials: S
authors.lastname: Kreisel
authors.forename: Frederike
authors.initials: F
authors.lastname: Vollmar
authors.forename: Angelika
authors.initials: A
authors.lastname: Alonso
authors.forename: Walter
authors.initials: W
authors.lastname: Back
authors.forename: Stephen
authors.initials: S
authors.lastname: Meairs
authors.forename: Michael G
authors.initials: MG
authors.lastname: Hennerici
mesh_terms: D053687:Adult Stem Cells / Q000502:physiology*; D000818:Animals; D015703:Antigens, CD / Q000378:metabolism; D001522:Behavior, Animal; D001835:Body Weight / Q000502:physiology; D001973:Bromodeoxyuridine / Q000378:metabolism; D002461:Cell Line, Transformed; D049109:Cell Proliferation; D002543:Cerebral Hemorrhage / Q000601:surgery*; D004195:Disease Models, Animal; D006801:Humans; D008297:Male; D045164:Mesenchymal Stem Cell Transplantation / Q000379:methods; D059630:Mesenchymal Stem Cells / Q000502:physiology*; D009043:Motor Activity / Q000502:physiology; D051381:Rats; D017208:Rats, Wistar; D020127:Recovery of Function / Q000502:physiology*; D013997:Time Factors
chemical_list: D015703:Antigens, CD; D001973:Bromodeoxyuridine