Angiogenesis Ischemic and Neoplastic Disorders

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  • Gregg L. Semenza
    McKusick-Nathans Institute of Genetic Medicine and the Departments of Pediatrics and Medicine, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21287-3914;

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<jats:p> Vascular development involves vasculogenesis, in which endothelial cells form a primary tubular network, as well as angiogenesis, in which vessel size and structure are modified based upon flow and branching occurs to insure that all cells receive adequate O<jats:sub>2</jats:sub> delivery. In adults, angiogenesis occurs in response to tissue hypoxia/ischemia and plays an important role in determining the progression of ischemic heart disease and cancer. A critical molecular pathway induced by hypoxia/ischemia is the activation of hypoxia-inducible factor 1, a transcriptional activator of genes encoding vascular endothelial growth factor and other important mediators of angiogenesis. Novel therapeutic approaches that involve stimulating angiogenesis in ischemic tissue and inhibiting angiogenesis in neoplastic tissue are currently being evaluated in clinical trials. </jats:p>

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