Regulation of vascularization by hypoxia-inducible factor 1.
Vascularization and vascular remodeling represent critical adaptive responses to tissue hypoxia that are mediated by hypoxia-inducible factor 1 (HIF-1). In patients with peripheral arterial disease, these responses are impaired by aging and diabetes, leading to critical limb ischemia and amputation. Intramuscular injection of an adenovirus encoding a constitutively active form of the HIF-1alpha subunit (CA5) increases the recovery of blood flow following femoral artery ligation in a mouse model of age-dependent critical limb ischemia. Intradermal injection of a plasmid encoding CA5 promotes healing of cutaneous wounds in a mouse model of diabetes. In cancer, vascularization is required for tumors to grow beyond microscopic size, a process that involves HIF-1-dependent production of angiogenic growth factors. Daily treatment of prostate cancer xenograft-bearing mice with low-dose anthracycline (doxorubicin or daunorubicin) chemotherapy inhibits HIF-1 DNA-binding activity, HIF-1-dependent expression of angiogenic growth factors, mobilization of circulating angiogenic cells, and tumor vascularization, thereby arresting tumor growth.
Semenza
Gregg L
GL
Vascular Program, Institute for Cell Engineering; McKusick-Nathans Institute of Genetic Medicine, Baltimore, Maryland 21205, USA. gsemenza@jhmi.edu
D000256:Adenoviridae / Q000235:genetics; D000818:Animals; D018943:Anthracyclines / Q000627:therapeutic use; D000903:Antibiotics, Antineoplastic / Q000627:therapeutic use; D015687:Cell Hypoxia / Q000235:genetics / Q000502:physiology; D004247:DNA / Q000378:metabolism; D004317:Doxorubicin / Q000627:therapeutic use; D006801:Humans; D051793:Hypoxia-Inducible Factor 1 / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D051795:Hypoxia-Inducible Factor 1, alpha Subunit / Q000235:genetics / Q000378:metabolism / Q000502:physiology; D008297:Male; D051379:Mice; D009389:Neovascularization, Pathologic / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D011471:Prostatic Neoplasms / Q000188:drug therapy; D011485:Protein Binding / Q000187:drug effects
D018943:Anthracyclines; D000903:Antibiotics, Antineoplastic; D051793:Hypoxia-Inducible Factor 1; D051795:Hypoxia-Inducible Factor 1, alpha Subunit; D004317:Doxorubicin; D004247:DNA