Study of genotype frequencies of ANP 664G/A polymorphism in normal subjects and CVD patients, and its association with plasma ANP levels

Atsumi Ohta, Akira Sonoda, Yoko Yatabe, Eiko Takeshita, Ikuo Saito, Daisuke Ito, Norio Tanahashi, Yasuo Fukuuchi, Haruhito Kikuchi, Mitsuru Murata, Kiyoaki Watanabe

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Atrial natriuretic peptide (ANP) plays a crucial role in regulating body fluid volume and blood pressure, by promoting natriuresis and vasodilatation and by inhibiting the renin-angiotensin system. Plasma levels of ANP are elevated in heart failure and hypertension, and ANP is thus believed to be involved in the pathogenesis of cardiovascular disorders. Previous case-control studies have shown that a single nucleotide polymorphism in the first exon of ANP gene, 664G/A, is associated with a risk of cerebrovascular disease (CVD) in white populations. Plasma ANP levels, however, were not evaluated in these studies in relation to the 664G/A, although the nucleotide substitution causes an amino-acid change in the propeptide of ANP. In this study, we analyzed the genotype frequencies of the 664G/A in Japanese patients with CVD (n = 199) and age- and gender-matched control subjects(n = 176). Genotypes with the 664A allele in the Japanese control subjects (G/A and A/A 12.5%) were apparently more frequent compared to the published frequency of the white control population (G/A and A/A 6.6%, p = 0.0437). Genotypes with the 664A allele, however, were not significantly different between our CVD patients(15.1%) and controls (12.5% p = 0.4714). In the control group (n = 137), the mean plasma ANP levels were not different between the 664G/G (15.7 +/- 10.7 pg/ml) and 664G/A genotypes (15.6 +/- 6.8 pg/ml, p = 0.9708). These results suggest that there is a racial difference in the allele frequency of 664G/A, and that this polymorphism may not be a major risk factor for CVD in the Japanese, nor is it a major determinant of plasma ANP level.

Original languageEnglish
Pages (from-to)296-300
Number of pages5
JournalRinsho byori. The Japanese journal of clinical pathology
Volume50
Issue number3
Publication statusPublished - 2002 Mar

ASJC Scopus subject areas

  • Medicine(all)

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