Epidemiologic and Genetic Associations of Erythropoietin With Blood Pressure, Hypertension, and Coronary Artery Disease

Author:

Sun Pengfei1,Kumar Nitin23,Tin Adrienne45ORCID,Zhao Jing1,Brown Michael R.6,Lin Zesen7,Yang Min-Lee23,Zheng Qiwen8,Jia Jia1,Bielak Lawrence F.9ORCID,Yu Bing6,Boerwinkle Eric6,Hunker Kristina L.23ORCID,Coresh Josef4ORCID,Chen Y. Eugene2ORCID,Huo Yong1,Kardia Sharon L.R.9,Khoriaty Rami10ORCID,Zhou Xiang11,Morrison Alanna C.6ORCID,Zhang Yan112ORCID,Ganesh Santhi K.23ORCID

Affiliation:

1. Department of cardiology, Peking University First hospital, Beijing, China (P.S., J.Z., J.J., Y.H., Y.Z.).

2. Division of Cardiovascular Medicine, Department of Internal Medicine (N.K., M.-L.Y., K.L.H., Y.E.C., S.K.G.), University of Michigan Medical School, Ann Arbor.

3. Department of Human Genetics (N.K., M.-L.Y., K.L.H., S.K.G.), University of Michigan Medical School, Ann Arbor.

4. Johns Hopkins Bloomberg School of Public Health, MD (A.T., J.C.).

5. University of Mississippi Medical Center (A.T.).

6. Human Genetics Center, Department of Epidemiology, Human Genetics & Environmental Sciences, School of Public Health, University of Texas Health Science Center at Houston (M.R.B., B.Y., E.B., A.C.M.).

7. Department of Pharmacology (Z.L.), University of Michigan Medical School, Ann Arbor.

8. Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences, China (Q.Z.).

9. Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor (L.F.B., S.L.R.K.).

10. Division of Hematology, Department of Internal Medicine and Department of Cell and Developmental Biology (R.K.), University of Michigan Medical School, Ann Arbor.

11. Department of Biostatistics and Center for Statistical Genetics, University of Michigan School of Public Health, Ann Arbor (X.Z.).

12. Institute of Cardiovascular Disease, Peking University First Hospital, Beijing, China (Y.Z.).

Abstract

While exogenous administration of recombinant erythropoietin has been associated with increased risk of hypertension, coronary artery disease, and mortality, it is not known if endogenous circulating erythropoietin level is associated with coronary artery disease and its risk factors. We measured and analyzed epidemiological and genetic associations of circulating plasma erythropoietin levels in 2 population cohorts, from China (N=4329) and the United States (N=3671). In vitro smooth muscle cell responses and in vivo murine studies of erythropoietin exposure were performed. Erythropoietin levels were positively and linearly associated with blood pressure traits and inversely associated with cholesterol levels and red cell indices. Higher erythropoietin level was associated with higher prevalence of hypertension (odds ratio, 1.20 [95% CI, 1.12–1.29], P =4.41×10 −7 ) and coronary artery disease (odds ratio, 1.16 [95% CI, 1.00–1.34], P =0.046). In a discovery stage genetic association study of erythropoietin level, we identified a previously reported locus on chromosome 6 (rs7776054 near HBS1L-MYB , P =4.86×10 −25 ) and a new locus on chromosome 4 (rs172629 near PDGFRA-KIT , P =2.1×10 −8 ), which was independently replicated. Meta-analysis of discovery and replication genetic association results identified a locus on chromosome 22 (rs855791 near TMPRSS6 , P =3.60×10 −9 ). Erythropoietin administration, within a physiological range of hematocrit achieved, induced hypertension in vivo and increased contraction of vascular smooth muscle cells in vitro. In conclusion, endogenous circulating erythropoietin level is influenced by common genetic variation and is associated with blood pressure traits, hypertension, and coronary artery disease. Vascular effects of erythropoietin demonstrated in vitro and in vivo support a newly discovered mechanism of hypertension and cardiovascular risk with potential implications for erythropoietic support in the clinic. Graphic Abstract: An online graphic abstract is available for this article.

Publisher

Ovid Technologies (Wolters Kluwer Health)

Subject

Internal Medicine

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