PMID: 12757881May 22, 2003Paper

Vascular gene delivery of anticoagulants by transplantation of retrovirally-transduced endothelial progenitor cells

Cardiovascular Research
Daniel P GrieseG A J Riegger

Abstract

Recent studies have documented the presence of bone marrow-derived endothelial progenitor cells (EPC) in the circulation of several species. This study was designed to evaluate the use of engineered EPC for vascular gene delivery into angioplasty-induced arterial lesions. EPC could easily be isolated from whole bone marrow and peripheral blood of adult rats. Differentiation was induced by culture on fibronectin in the presence of endothelial specific growth factors. Rat EPC shared several phenotypic and functional properties with mature endothelial cells. Recombinant retroviruses were generated encoding for the anticoagulants tissue-type plasminogen activator (tPA) and hirudin. Efficient (>90%) ex vivo gene transfer could be achieved resulting in high levels of transgene production. Engineered EPC were locally infused into freshly balloon-injured carotid arteries. Analysis of day 7 vessels showed 73+/-10% luminal coverage of the lesioned arterial bed with transduced EPC. Sustained secretion of both anticoagulants could be detected in organ cultures of explanted arteries. EPC seeding inhibited dilation of the injured arterial segment and prevented reduction of media thickness. However, rapid repopulation with EPC failed to atten...Continue Reading

Citations

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