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The genetics of hypertension
Gabriel Stölting1, Kieu Nhi Tran Vo1, Janek Haus1
1Center of Genomic Medicine, Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany.
Insights
Hypertension, a common condition causing millions of deaths, has genetic roots. Research identifies rare genetic mutations and common variants influencing blood pressure, offering insights for new drug targets.
Area of Science:
- Genetics
- Cardiology
- Endocrinology
Background:
- Hypertension affects one-third of adults globally, causing 8.5 million deaths annually.
- Family studies indicate significant heritability of blood pressure, pointing to genetic contributions.
- Both rare monogenic forms and common polygenic forms of hypertension exist.
Purpose of the Study:
- To explore the genetic underpinnings of hypertension.
- To identify genetic variants contributing to blood pressure regulation.
- To evaluate potential therapeutic targets for hypertension.
Main Methods:
- Linkage studies and next-generation sequencing identified variants in rare monogenic hypertension syndromes.
- Genome-wide association studies (GWAS) identified numerous small-effect variants in polygenic hypertension.
- Analysis of somatic mutations in hormone-producing tumors associated with hypertension.
Main Results:
- Several large-effect variants causing rare monogenic hypertension syndromes were identified.
- Numerous small-effect variants contributing to hypertension as a complex trait were discovered through GWAS.
- Epigenetic mechanisms were found to influence gene expression and blood pressure.
Conclusions:
- Genetic factors play a substantial role in hypertension development.
- Understanding genetic contributions, including rare and common variants, is crucial for managing hypertension.
- Proteins implicated in Mendelian hypertension syndromes represent potential targets for novel antihypertensive drugs.
Abstract:
Hypertension, or persistently elevated blood pressure, affects about one third of the adult population worldwide and causes approximately 8.5 million deaths annually. Family studies have demonstrated that blood pressure shows substantial heritability, suggesting that genetic factors contribute to hypertension. Linkage studies and next-generation sequencing efforts have identified several variants with large effect sizes that cause rare monogenic hypertension syndromes. These syndromes often present with early onset and typically affect adrenal and renal regulation of salt reabsorption. In addition, somatic (tumour-specific) mutations have been identified in hormone-producing tumours that cause hypertension (phaeochromocytomas, aldosterone-producing adenomas, cortisol-producing adenomas, pituitary adenomas, reninomas). However, most cases of hypertension are polygenic. Large genome-wide association studies have identified many variants with small effect sizes that add to our understanding of blood pressure as a complex trait. Epigenetic mechanisms also influence gene expression and contribute to blood-pressure alterations. Several proteins that are affected by Mendelian diseases are targets of existing antihypertensive drugs and other such proteins may be good candidates for future drug development.
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