IMR Press / FBL / Volume 14 / Issue 9 / DOI: 10.2741/3475

Frontiers in Bioscience-Landmark (FBL) is published by IMR Press from Volume 26 Issue 5 (2021). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on imrpress.com as a courtesy and upon agreement with Frontiers in Bioscience.

Open Access Article
EPC adhesion to arteries from diabetic and non-diabetic patients: effect of pioglitazone
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1 Department of Pharrmacology, School of Medicine, Universidad Complutense, 28040 Madrid, Spain
2 Cardiac Surgery Service, Hospital Clinico San Carlos, 28040 Madrid, Spain
3 Centro de Investigacion Cardiovascular (CSIC-ICCC), Hospital de la Santa Creu i Sant Pau, c/Antoni Mª Claret 167, 08025 Barcelona, Spain

Academic Editor: Mark Slevin

Front. Biosci. (Landmark Ed) 2009, 14(9), 3608–3618; https://doi.org/10.2741/3475
Published: 1 January 2009
Abstract

Endothelial progenitor cell (EPC) dysfunction is an important mediator of vascular disease in diabetes. We aimed to elucidate the mechanism of adhesion of EPC to diabetic and non-diabetic arteries and to study the effect of the anti-diabetic drug pioglitazone. Peripheral blood mononuclear cells were isolated from healthy donors. Human internal mammary arteries (HIMA) were isolated from patients who underwent coronary artery bypass surgery. EPC were labelled with 111In-oxine and perfused to HIMA in a perfusion chamber. Stromal derived factor-1 (SDF-1) and cyclooxygenase-2 (COX-2) were assessed by immunohistochemical analysis. CXCR-4 expression was assessed by flow cytometry. Adhesion of EPC was increased in HIMA from diabetic patients and was reduced after preincubation with 15 mM glucose for 72 h. EPC adhesion and CXCR-4 expression were inversely correlated. COX-2 and SDF-1 immunostaining in HIMA were positively correlated. Pioglitazone (1 µM) increased the adhesion of EPC to HIMA and the expression of CXCR-4 in EPC. Therefore, EPC-recruiting capability is increased in diabetic arteries, although EPC adhesion is notably impaired by high glucose concentrations. Interestingly, pioglitazone treatment enhances EPC adhesiveness.

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