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[Genes in rennin-angiotensin system].

Tomohiro Katsuya1, Toshio Ogihara

  • 1Department of Geriatric Medicine, Osaka University Graduate School of Medicine.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|January 24, 2004
PubMed
Summary

Gene variations in the renin-angiotensin system (RAS) are linked to hypertension. Polymorphisms in angiotensinogen and ACE genes impact disease risk and progression, highlighting the system's complexity.

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Area of Science:

  • Genetics and Molecular Biology
  • Cardiovascular Physiology
  • Pharmacogenomics

Context:

  • Hypertension pathogenesis is significantly influenced by genetic factors within the renin-angiotensin system (RAS).
  • Numerous association studies have identified specific gene polymorphisms associated with increased hypertension risk and related conditions.
  • Understanding these genetic underpinnings is crucial for personalized medicine approaches in cardiovascular disease.

Purpose:

  • To review the role of gene polymorphisms in the renin-angiotensin system (RAS) in the development and progression of hypertension.
  • To highlight the impact of specific polymorphisms, such as angiotensinogen M235T/G-6A and ACE DD, on disease risk and clinical outcomes.
  • To discuss findings from gene-targeting experiments and simulations emphasizing the interaction between RAS and the kallikrein-kinin system (KKS).

Summary:

  • Polymorphisms in angiotensinogen (e.g., M235T, G-6A) are associated with salt sensitivity, lacunar infarction, and altered blood pressure patterns.
  • The angiotensin-converting enzyme (ACE) DD genotype increases risk for male hypertension, ischemic heart disease, and renal disease, often with poor medication response.
  • Gene targeting in mice and simulations underscore the critical interaction between RAS and the kallikrein-kinin system (KKS) in blood pressure regulation.

Impact:

  • Provides insights into the genetic basis of hypertension, informing risk stratification and potential therapeutic targets.
  • Emphasizes the importance of gene-environment interactions, such as salt sensitivity, in hypertension development.
  • Suggests that understanding RAS gene polymorphisms can lead to improved treatment strategies and better patient outcomes in cardiovascular and renal diseases.

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