In a comprehensive study published in Nature Genetics, researchers identified over 100 new genomic loci that influence blood pressure, using data from more than a million participants. The findings, which also relate to iron metabolism and adrenergic receptors, could lead to novel treatments for hypertension. Credit: SciTechDaily.com

Over 100 new genomic regions linked to blood pressure were discovered, offering insights into iron metabolism and potential new drug targets for treating hypertension.

NIH-led study finds genetic markers that explain up to 12% of the differences between two peoples blood pressure.

National Institutes of Health (NIH) researchers and collaborators have discovered over 100 new regions of the human genome, also known as genomic loci, that appear to influence a persons blood pressure. Results of the study also point to several specific genomic loci that may be relevant to iron metabolism and a type of cellular receptor known as adrenergic receptors.

The study, published recently in the journal Nature Genetics, is one of the largest such genomic studies of blood pressure to date, including data from over 1 million participants and laying the groundwork for researchers to better understand how blood pressure is regulated. Such insights could point to potential new drug targets.

NIH-led study finds genetic markers that explain up to 12% of the differences between two peoples blood pressure. Credit: Darryl Leja, National Human Genome Research Institute

Our study helps explain a much larger proportion of the differences between two peoples blood pressure than was previously known, said Jacob Keaton, Ph.D., staff scientist in the Precision Health Informatics Section within the National Human Genome Research Institutes (NHGRI) Intramural Research Program and first author of the study. Our study found additional genomic locations that together explain a much larger part of the genetic differences in peoples blood pressure. Knowing a persons risk for developing hypertension could lead to tailored treatments, which are more likely to be effective.

To understand the genetics of blood pressure, the researchers combined four large datasets from genome-wide association studies of blood pressure and hypertension. After analyzing the data, they found over 2,000 genomic loci linked to blood pressure, including 113 new regions. Among the newly discovered genomic loci, several reside in genes that play a role in iron metabolism, confirming previous reports that high levels of accumulated iron can contribute to cardiovascular disease.

The researchers also confirmed the association between variants in the ADRA1A gene and blood pressure. ADRA1A encodes a type of cell receptor, called an adrenergic receptor, that is currently a target for blood pressure medication, suggesting that other genomic variants discovered in the study may also have the potential to be drug targets to alter blood pressure.

This study shows that these big genome-wide association studies have clinical relevance for finding new drug targets and are needed to discover more drug targets as we go forward, said Dr. Keaton.

From these analyses, the researchers were able to calculate a polygenic risk score, which combines the effects of all genomic variants together to predict blood pressure and risk for hypertension. These risk scores consider which genomic variants confer risk for hypertension and reveal clinically meaningful differences between peoples blood pressure.

Polygenic risk scores have potential to serve as a useful tool in precision medicine, but more diverse genomic data is needed for them to be applicable broadly in routine health care. While the collected data was mostly from people of European ancestry (due to limited availability of diverse datasets when the study was started), the researchers found that the polygenic risk scores were also applicable to people of African ancestry, which was confirmed through analyzing data from NIHs All of Us Research Program, a nationwide effort to build one of the largest biomedical data resources and accelerate research to improve human health.

Nearly half of adults in the United States have high blood pressure, known as hypertension. High blood pressure often runs in families, meaning that there is a genetic component to developing the condition in addition to environmental contributions such as a high-salt diet, lack of exercise, smoking, and stress. When blood pressure is consistently too high, it can damage the heart and blood vessels throughout the body, increasing a persons risk for heart disease, kidney disease, stroke, and other conditions.

For more on this research, see 2,000 Genetic Signals Linked to Blood Pressure Discovered in Study of Over a Million People.

Reference: Genome-wide analysis in over 1 million individuals of European ancestry yields improved polygenic risk scores for blood pressure traits by Jacob M. Keaton, Zoha Kamali, Tian Xie, Ahmad Vaez, Ariel Williams, Slavina B. Goleva, Alireza Ani, Evangelos Evangelou, Jacklyn N. Hellwege, Loic Yengo, William J. Young, Matthew Traylor, Ayush Giri, Zhili Zheng, Jian Zeng, Daniel I. Chasman, Andrew P. Morris, Mark J. Caulfield, Shih-Jen Hwang, Jaspal S. Kooner, David Conen, John R. Attia, Alanna C. Morrison, Ruth J. F. Loos, Kati Kristiansson, Reinhold Schmidt, Andrew A. Hicks, Peter P. Pramstaller, Christopher P. Nelson, Nilesh J. Samani, Lorenz Risch, Ulf Gyllensten, Olle Melander, Harriette Riese, James F. Wilson, Harry Campbell, Stephen S. Rich, Bruce M. Psaty, Yingchang Lu, Jerome I. Rotter, Xiuqing Guo, Kenneth M. Rice, Peter Vollenweider, Johan Sundstrm, Claudia Langenberg, Martin D. Tobin, Vilmantas Giedraitis, Jianan Luan, Jaakko Tuomilehto, Zoltan Kutalik, Samuli Ripatti, Veikko Salomaa, Giorgia Girotto, Stella Trompet, J. Wouter Jukema, Pim van der Harst, Paul M. Ridker, Franco Giulianini, Veronique Vitart, Anuj Goel, Hugh Watkins, Sarah E. Harris, Ian J. Deary, Peter J. van der Most, Albertine J. Oldehinkel, Bernard D. Keavney, Caroline Hayward, Archie Campbell, Michael Boehnke, Laura J. Scott, Thibaud Boutin, Chrysovalanto Mamasoula, Marjo-Riitta Jrvelin, Annette Peters, Christian Gieger, Edward G. Lakatta, Francesco Cucca, Jennie Hui, Paul Knekt, Stefan Enroth, Martin H. De Borst, Ozren Polaek, Maria Pina Concas, Eulalia Catamo, Massimiliano Cocca, Ruifang Li-Gao, Edith Hofer, Helena Schmidt, Beatrice Spedicati, Melanie Waldenberger, David P. Strachan, Maris Laan, Alexander Teumer, Marcus Drr, Vilmundur Gudnason, James P. Cook, Daniela Ruggiero, Ivana Kolcic, Eric Boerwinkle, Michela Traglia, Terho Lehtimki, Olli T. Raitakari, Andrew D. Johnson, Christopher Newton-Cheh, Morris J. Brown, Anna F. Dominiczak, Peter J. Sever, Neil Poulter, John C. Chambers, Roberto Elosua, David Siscovick, Tnu Esko, Andres Metspalu, Rona J. Strawbridge, Markku Laakso, Anders Hamsten, Jouke-Jan Hottenga, Eco de Geus, Andrew D. Morris, Colin N. A. Palmer, Ilja M. Nolte, Yuri Milaneschi, Jonathan Marten, Alan Wright, Eleftheria Zeggini, Joanna M. M. Howson, Christopher J. ODonnell, Tim Spector, Mike A. Nalls, Eleanor M. Simonsick, Yongmei Liu, Cornelia M. van Duijn, Adam S. Butterworth, John N. Danesh, Cristina Menni, Nicholas J. Wareham, Kay-Tee Khaw, Yan V. Sun, Peter W. F. Wilson, Kelly Cho, Peter M. Visscher, Joshua C. Denny, Million Veteran Program, Lifelines Cohort Study, CHARGE consortium, ICBP Consortium, Daniel Levy, Todd L. Edwards, Patricia B. Munroe, Harold Snieder and Helen R. Warren, 30 April 2024, Nature Genetics. DOI: 10.1038/s41588-024-01714-w

The project was led by researchers at NHGRI in collaboration with Queen Mary University of London, Vanderbilt University Medical Center, Nashville, Tennessee, the University of Groningen in the Netherlands and other institutions, as part of the International Consortium of Blood Pressure. Over 140 investigators from more than 100 universities, institutes and government agencies contributed to this international study.

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Scientists Unveil the Genetic Blueprint of Blood Pressure - SciTechDaily