Volume 13, Issue 9b pp. 3405-3414

Altered SDF-1-mediated differentiation of bone marrow-derived endothelial progenitor cells in diabetes mellitus

Elena De Falco

Elena De Falco

Laboratorio di Patologia Vascolare, Istituto Dermopatico dell’ Immacolata, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy

These authors contributed equally.

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Daniele Avitabile

Daniele Avitabile

Laboratorio di Patologia Vascolare, Istituto Dermopatico dell’ Immacolata, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy

These authors contributed equally.

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Pierangela Totta

Pierangela Totta

Laboratorio di Patologia Vascolare, Istituto Dermopatico dell’ Immacolata, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy

These authors contributed equally.

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Stefania Straino

Stefania Straino

Laboratorio di Patologia Vascolare, Istituto Dermopatico dell’ Immacolata, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy

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Francesco Spallotta

Francesco Spallotta

Laboratorio di Patologia Vascolare, Istituto Dermopatico dell’ Immacolata, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy

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Chiara Cencioni

Chiara Cencioni

Laboratorio di Patologia Vascolare, Istituto Dermopatico dell’ Immacolata, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy

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Anna Rita Torella

Anna Rita Torella

Laboratorio di Patologia Vascolare, Istituto Dermopatico dell’ Immacolata, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy

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Roberto Rizzi

Roberto Rizzi

Laboratorio di Biologia Vascolare e Terapia Genica, Centro Cardiologico Monzino – IRCCS, Milan, Italy

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Daniele Porcelli

Daniele Porcelli

Laboratorio di Patologia Vascolare, Istituto Dermopatico dell’ Immacolata, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy

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Antonella Zacheo

Antonella Zacheo

Laboratorio di Patologia Vascolare, Istituto Dermopatico dell’ Immacolata, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy

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Luca Di Vito

Luca Di Vito

Laboratorio di Patologia Vascolare, Istituto Dermopatico dell’ Immacolata, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy

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Giulio Pompilio

Giulio Pompilio

Laboratorio di Biologia Vascolare e Terapia Genica, Centro Cardiologico Monzino – IRCCS, Milan, Italy

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Monica Napolitano

Monica Napolitano

Laboratorio di Patologia Vascolare, Istituto Dermopatico dell’ Immacolata, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy

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Guido Melillo

Guido Melillo

Laboratorio di Patologia Vascolare, Istituto Dermopatico dell’ Immacolata, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy

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Maurizio C. Capogrossi

Maurizio C. Capogrossi

Laboratorio di Patologia Vascolare, Istituto Dermopatico dell’ Immacolata, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy

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Maurizio Pesce

Corresponding Author

Maurizio Pesce

Laboratorio di Biologia Vascolare e Terapia Genica, Centro Cardiologico Monzino – IRCCS, Milan, Italy

Correspondence to: Maurizio PESCE, Centro Cardiologico Monzino – IRCCS, Via Parea 4, 20138 Milan, Italy.
Tel.: +39-0258002019
Fax: +39-0258002623
E-mail: [email protected]Search for more papers by this author
First published: 29 January 2010
Citations: 39

Abstract

In diabetic patients and animal models of diabetes mellitus (DM), circulating endothelial progenitor cell (EPC) number is lower than in normoglycaemic conditions and EPC angiogenic properties are inhibited. Stromal cell derived factor-1 (SDF-1) plays a key role in bone marrow (BM) c-kit+ stem cell mobilization into peripheral blood (PB), recruitment from PB into ischemic tissues and differentiation into endothelial cells. The aim of the present study was to examine the effect of DM in vivo and in vitro, on murine BM-derived c-kit+ cells and on their response to SDF-1. Acute hindlimb ischemia was induced in streptozotocin-treated DM and control mice; circulating c-kit+ cells exhibited a rapid increase followed by a return to control levels which was significantly faster in DM than in control mice. CXCR4 expression by BM c-kit+ cells as well as SDF-1 protein levels in the plasma and in the skeletal muscle, both before and after the induction of ischemia, were similar between normoglycaemic and DM mice. However, BM-derived c-kit+ cells from DM mice exhibited an impaired differentiation towards the endothelial phenotype in response to SDF-1; this effect was associated with diminished protein kinase phosphorylation. Interestingly, SDF-1 ability to induce differentiation of c-kit+ cells from DM mice was restored when cells were cultured under normoglycaemic conditions whereas c-kit+ cells from normoglycaemic mice failed to differentiate in response to SDF-1 when they were cultured in hyperglycaemic conditions. These results show that DM diminishes circulating c-kit+ cell number following hindlimb ischemia and inhibits SDF-1-mediated AKT phosphorylation and differentiation towards the endothelial phenotype of BM-derived c-kit+ cells.

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