Published online before print March 4, 2004, doi: 10.1161/01.ATV.0000124891.57581.9f
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© 2004 American Heart Association, Inc.
Brief Reviews |
Endothelial Progenitor Cells: More Than an Inflammatory Response?
From the Department of Nephrology, Leiden University Medical Center, The Netherlands.
Correspondence to Ton J. Rabelink, Department of Nephrology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands. E-mail t.rabelink{at}lumc.nl
The formation of new capillaries (angiogenesis) may be of clinical importance in facilitating reperfusion and regeneration of hibernating cardiac tissue after myocardial infarction and in microvascular ischemia. Evidence is accumulating that as part of the response to hypoxia, bone marrow-derived circulating endothelial progenitor cells (CEPs) are mobilized and subsequently differentiate into proper endothelial cells. There are also indications that such CEPs can facilitate endothelial repair and angiogenesis in vivo. It is not clear yet, however, whether these CEPs are essential for these adaptive processes or what the relative contribution of CEP is compared with that of other mononuclear inflammatory cells that are mobilized to areas of ischemia. Moreover, there are still many uncertainties about how cardiovascular risk factors alter CEP function. Particularly when therapeutically mobilizing CEPs, a further understanding of this issue is essential to assess the risk of potentially harmful side effects of altered CEP function.
Key Words: angiogenesis • atherosclerosis • endothelial progenitor
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