Hypoxia-Inducible Factor 1α Polymorphism and Coronary Collaterals in Patients With Ischemic Heart Disease

• Published in: Chest Vol. 128; no. 2; p. 787
• Main Authors: Jon R. Resar, Ariel Roguin, Jeffery Voner, Khurram Nasir, Thomas A. Hennebry, Julie M. Miller, Roxann Ingersoll, Laura M. Kasch, Gregg L. Semenza
• Format: Journal Article
• Language: English
• Published: American College of Chest Physicians 01.08.2005
• ISSN: 0012-3692; 1931-3543
• DOI: 10.1378/chest.128.2.787

Study objectives: Marked variability exists in coronary artery collaterals in patients with ischemic heart disease. Although multiple factors are thought to play a role in collateral development, the contribution of genetic factors is largely unknown. Hypoxia inducible factor 1 (HIF-1), a transcriptional activator that functions as a master regulator of oxygen homeostasis, is one possible genetic factor that could play an important role in modulating collateral development. Design, setting, and participants: Collateral vessels were determined in 100 patients with ≥ 70% narrowing of at least one coronary artery without acute myocardial infarction or prior revascularization. DNA was genotyped for the presence of a single nucleotide (C to T) polymorphism that changes residue 582 of HIF-1α from proline to serine. Measurements and results: The frequency of the T allele was significantly higher among patients without collaterals compared to patients with collaterals (0.188 vs 0.037, p < 0.001). In multivariate analyses, two variables affecting collateral formation were detected: two- or three-vessel coronary artery disease was a significant positive predictor (odds ratio [OR], 4.17; 95% confidence interval [CI], 1.61 to 10.8; p = 0.001), whereas the presence of HIF-1α genotype CT or TT was a negative predictor (OR, 0.19; 95% CI, 0.04 to 0.84; p = 0.03). Conclusions: These data suggest that variations in HIF-1α genotype may influence development of coronary artery collaterals in patients with significant coronary artery disease.