Dr. Yoon is honored with election into ASCI


Category Archives: 2003

Yoon and Losordo, Circ Res, 2003

Ischemic disease is the leading cause of morbidity and mortality in the United States, accounting for almost 50% of overall mortality, and endothelial dysfunction is a key pathophysiological process that underlies both myocardial and peripheral ischemia. The prevalence of peripheral arterial disease is 12% in the United States, where 150 000 patients undergo lower-limb amputations every year. The overall prognosis after amputation is guarded at best, given a perioperative mortality rate of 5% to 20% and 2-year follow-up mortality rate of 40%. For those patients who have advanced ischemic cardiac or peripheral

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Goukassian et al., Circ Res, 2003

Tumor necrosis factor-alpha (TNF-alpha) is expressed locally in the vessel wall after angioplasty and induces growth arrest and apoptosis in endothelial cells (ECs), thereby delaying reendothelialization. Prior studies have shown that direct antagonism of TNF-alpha, using a systemically administered soluble receptor, can enhance endothelial recovery and reduce neointimal thickening. These studies have also shown that downregulation of the transcription factor E2F1 was a key mechanism of TNF’s effect on ECs. We now show that Ad-E2F1 overexpression at sites of balloon injury accelerates functional endothelial recovery,

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Yoon et al., J Clin Invest, 2003

Although lymphedema is a common clinical condition, treatment for this disabling condition remains limited and largely ineffective. Recently, it has been reported that overexpression of VEGF-C correlates with increased lymphatic vessel growth (lymphangiogenesis). However, the effect of VEGF-C-induced lymphangiogenesis on lymphedema has yet to be demonstrated. Here we investigated the impact of local transfer of naked plasmid DNA encoding human VEGF-C (phVEGF-C) on two animal models of lymphedema: one in the rabbit ear and the other in the mouse tail. In a rabbit model, following local phVEGF-C

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Kawamoto et al., Circulation, 2003

We investigated whether catheter-based, intramyocardial transplantation of autologous endothelial progenitor cells can enhance neovascularization in myocardial ischemia. Myocardial ischemia was induced by placement of an ameroid constrictor around swine left circumflex artery. Four weeks after constrictor placement, CD31+ mononuclear cells (MNCs) were freshly isolated from the peripheral blood of each animal. After overnight incubation of CD31+ MNCs in noncoated plates, nonadhesive cells (NA/CD31+ MNCs) were harvested as the endothelial progenitor cell-enriched fraction. Nonadhesive CD31- cells

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