Increased prevalence of EPAS1 variant in cattle with high-altitude pulmonary hypertension

John H. Newman (), Timothy N. Holt, Joy D. Cogan, Bethany Womack, John A. Phillips, Chun Li, Zachary Kendall, Kurt R. Stenmark, Milton G. Thomas, R. Dale Brown, Suzette R. Riddle, James D. West and Rizwan Hamid
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John H. Newman: Pulmonary and Critical Care, Vanderbilt University School of Medicine
Timothy N. Holt: College of Agricultural Science, Colorado State University
Joy D. Cogan: Vanderbilt University School of Medicine
Bethany Womack: Vanderbilt University School of Medicine
John A. Phillips: Vanderbilt University School of Medicine
Chun Li: Case Western Reserve University
Zachary Kendall: Vanderbilt University School of Medicine
Kurt R. Stenmark: Cardiovascular Pulmonary Research Laboratory, University of Colorado
Milton G. Thomas: Colorado State University
R. Dale Brown: Cardiovascular Pulmonary Research Laboratory, University of Colorado
Suzette R. Riddle: Cardiovascular Pulmonary Research Laboratory, University of Colorado
James D. West: Pulmonary and Critical Care, Vanderbilt University School of Medicine
Rizwan Hamid: Vanderbilt University School of Medicine

Nature Communications, 2015, vol. 6, issue 1, 1-5

Abstract: Abstract High-altitude pulmonary hypertension (HAPH) has heritable features and is a major cause of death in cattle in the Rocky Mountains, USA. Although multiple genes are likely involved in the genesis of HAPH, to date no major gene variant has been identified. Using whole-exome sequencing, we report the high association of an EPAS1 (HIF2α) double variant in the oxygen degradation domain of EPAS1 in Angus cattle with HAPH, mean pulmonary artery pressure >50 mm Hg in two independent herds. Expression analysis shows upregulation of 26 of 27 HIF2α target genes in EPAS1 carriers with HAPH. Of interest, this variant appears to be prevalent in lowland cattle, in which 41% of a herd of 32 are carriers, but the variant may only have a phenotype when the animal is hypoxemic at altitude. The EPAS1 variant will be a tool to determine the cells and signalling pathways leading to HAPH.

Date: 2015
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DOI: 10.1038/ncomms7863

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