A/C1166 gene polymorphism of the angiotensin II type 1 receptor (AT1) and ambulatory blood pressure: The Ohasama Study

Masahiro Kikuya, Ken Sugimoto, Tomohiro Katsuya, Michiko Suzuki, Tomomi Sato, Jin Funahashi, Ryusuke Katoh, Itsuro Kazama, Mari Michimata, Tsutomu Araki, Atsushi Hozawa, Ichiro Tsuji, Toshio Ogihara, Teruyuki Yanagisawa, Yutaka Imai, Mitsunobu Matsubara

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45 Citations (Scopus)

Abstract

We previously investigated the relation between hypertension and each of three major genetic polymorphisms in the renin-angiotensin (AGT)-aldosterone system (R-A-A), AGT M235T, angiotensin convert enzyme (ACE) I/D, and CYP11B2 -344C/T, by means of ambulatory blood pressure (ABP) monitoring in a general Japanese population (the Ohasama Study). A/C1166 gene polymorphism in the 3′ untranslated region of the angiotensin II type 1 receptor (AT1) gene is the final remaining major target in R-A-A to be examined in the Ohasama Study population. In the present study, the AT1 A/C1166 polymorphism was genotyped by the TaqMan polymelase chain reaction (PCR) method or restriction fragment length polymorphism (RFLP) in 802 Japanese subjects aged 40 and over, who were previously genotyped for the AGT M235T, ACE D/I, CYP11B2 -344C/T polymorphisms. The AA genotype, AC genotype, and CC genotype were present in 678 (84.5%), 121 (15.1%), and 3 (0.4%) of subjects, respectively. Since the frequency of the C allele was quite low (0.079), the genotypes were classified according to the presence or absence of the C allele. Although daytime blood pressure (BP) was higher in subjects with the C allele, the difference was not statistically significant after adjusting for age, gender, body mass index, and smoking status. No significant difference was noted in the prevalence of cardiovascular diseases or nocturnal BP decline between the two groups. These results indicated that AT1 A/C1166 polymorphism was not associated with any clinical parameters associated with hypertension or atherosclerosis in the Japanese population.

Original languageEnglish
Pages (from-to)141-145
Number of pages5
JournalHypertension Research
Volume26
Issue number2
DOIs
Publication statusPublished - 2003 Feb

Keywords

  • Atherosclerosis
  • Circadian blood pressure variation
  • Hypertension
  • Nocturnal blood pressure decline

ASJC Scopus subject areas

  • Internal Medicine
  • Physiology
  • Cardiology and Cardiovascular Medicine

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