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Chemotaxis and differentiation of human adipose tissue CD34+/CD31- progenitor cells: role of stromal derived factor-1 released by adipose tissue capillary endothelial cells.

Abstract : The native CD34+/CD31- cell population present in the stroma-vascular fraction of human adipose tissue (hAT) displays progenitor cell properties since they exhibit adipocyte- and endothelial cell-like phenotypes under appropriate stimuli. To analyze the signals within hAT regulating their phenotypes, the influence of hAT-derived capillary endothelial cells (CECs) was studied on the chemotaxis and differentiation of the hAT-CD34+/CD31- cells. Conditioned medium from hAT-CECs led to a strong chemotaxis of the hAT-CD34+/CD31- cells that was inhibited with pretreatments with pertussis toxin, CXCR-4 antagonist, or neutralizing antibodies. Furthermore, hAT-CECs produced and secreted the CXCR-4 ligand, that is, the stromal derived factor-1 (SDF-1). Finally, hAT-CECs induced the differentiation of hAT-CD34+/CD31- cells toward an endothelial cell (EC) phenotype. Indeed, hAT-CECs and -CD34+/CD31- cell coculture stimulated in a two-dimensional system the expression of the EC CD31 marker by the hAT-progenitor cells and, in a three-dimensional approach, the formation of capillary-like structures via a SDF-1/CXCR-4 dependent pathway. Thus, the migration and differentiation of hAT progenitor cells are modulated by hAT-CEC-derived factors. SDF-1, which is secreted by hAT-derived CECs, and its receptor CXCR-4, expressed by hAT-derived progenitor cells, may promote chemotaxis and differentiation of hAT-derived progenitor cells and thus contribute to the formation of the vascular network during the development of hAT.
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https://www.hal.inserm.fr/inserm-00409796
Contributor : Marie Francoise Simon <>
Submitted on : Thursday, August 13, 2009 - 8:32:33 AM
Last modification on : Friday, January 10, 2020 - 9:09:09 PM

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Coralie Sengenès, Alexandra Miranville, Marie Maumus, Sandra de Barros, Rudi Busse, et al.. Chemotaxis and differentiation of human adipose tissue CD34+/CD31- progenitor cells: role of stromal derived factor-1 released by adipose tissue capillary endothelial cells.. Stem Cells / Stem Cells (Miamisburg), Alphamed Press, 2007, 25 (9), pp.2269-76. ⟨10.1634/stemcells.2007-0180⟩. ⟨inserm-00409796⟩

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