Prospective comparative analysis of the angiogenic capacity of monocytes and CD133+ cells in a murine model of hind limb ischemia

Cytotherapy
Natalia López-HolgadoMaria Consuelo del Cañizo

Abstract

The aim of this study was to compare prospectively the vasculogenic capacity of two cell sources, monocytes and CD133+ cells. Cells were obtained from healthy donors by adherence or magnetic selection. Animals studies were performed in a model of hind limb ischemia and different groups were established according to type and number of cells infused. Revascularization was measured by sequential blood flow analysis using a laser Doppler device and by assessing capillary density in the ischemic muscles. In order to locate the infused cells, immunofluorescence and immunocytochemistry techniques were performed and analyzed by light and confocal microscopy. During the study period there was a significant improvement in both limb perfusion and capillary density in mice treated with either human monocytes or CD133+ cells (P<0.05) compared with non-treated mice. No cells were detected as incorporated into the vessels when 1 x 10(5) cells were used but with higher doses (1 x 10(6)) a few human cells were observed integrated into the vessels in both groups of treated mice. Supernatants of both cell types showed vascular endothelial growth factor (VEGF), epidermal growth factor (EGF) and platelet-derived growth factor- AB (PDGF-AB) expressi...Continue Reading

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