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  • Title: Relation between the angiotensin-converting enzyme insertion/deletion polymorphism and blood pressure in Japanese male subjects.
    Author: Todoroki M, Minami J, Ishimitsu T, Ohrui M, Matsuoka H.
    Journal: J Hum Hypertens; 2003 Oct; 17(10):713-8. PubMed ID: 14504630.
    Abstract:
    Inconsistent results have been reported regarding the association of the angiotensin-converting enzyme (ACE) insertion/deletion (I/D) polymorphism and hypertension. Recent studies of population-based samples of three different areas in Japan presented conflicting results regarding this association. We, thus, investigated the relation between the ACE I/D polymorphism and blood pressure (BP), or the frequency of hypertension, respectively, in 706 Japanese male subjects who participated in the health check-up programme of our hospital. The ACE I/D polymorphism was determined by the polymerase chain reaction technique. Of 706 subjects, 203 were found to have hypertension and the other 503 were found to be normotensive. In all subjects, the frequencies of the DD, ID, and II genotypes were 0.123, 0.432, and 0.445, respectively, and the allelic frequency of the D allele was 0.339. In the younger subjects aged <50 years (n=264), neither systolic nor diastolic BP differed significantly among the genotypes. Conversely, in the older subjects aged > or =50 years (n=442), the systolic BP was significantly higher by 5.9 mmHg in the subjects with the ID genotype than those with the II genotype (P<0.01), and the diastolic BP was significantly higher in the subjects with the DD and ID genotypes by 5.1 and 3.3 mmHg, respectively than those with the II genotype (P<0.05 for each), although age, BMI, percentage of smoking habits, drinking habits, or the use of antihypertensive drugs did not differ significantly among the genotypes. In addition, in the older subjects, the hypertensive subjects showed significantly higher frequencies of the DD and ID genotypes and the D allele than the normotensive subjects. These results demonstrated that there was no significant association of the ACE I/D polymorphism with BP or a prevalence of hypertension in younger Japanese men aged <50 years but there was in older Japanese men aged > or =50 years.
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