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  • Title: A-6G variant of the angiotensinogen gene and essential hypertension in Han, Tibetan, and Yi populations.
    Author: Liu Y, Qin W, Hou S, Shan G, Zhuo M, Chen Y, Cui C, Caidan L, Qiu C.
    Journal: Hypertens Res; 2001 Mar; 24(2):159-63. PubMed ID: 11325075.
    Abstract:
    To investigate the relationship between the A-6G variant in the promoter of the angiotensinogen gene and essential hypertension in Han, Tibetan, and Yi populations. All patients with essential hypertension were selected by WHO criteria. And the polymorphism of the A-6G variant was determined by PCR/RFLP. The data were analyzed by t test and chi2 test. There was no significant difference in the genotype or allele frequencies between normotensives and hypertensives in the Han, Tibetan, and Yi populations, respectively. However, when the subjects were divided into male and female subgroups, the genotype distributions among hypertensives and normotensives of the Tibetan female group were as follows: AA, 37% vs. 48%; AG, 52% vs. 48%; GG, 11% vs. 4%, respectively and the frequency of the G allele was significantly higher in hypertensives than in normotensives in the Tibetan female group (0.37 vs. 0.28, chi2=4.25, p<0.05). In addition, we observed that there was a significant difference between the Han and Tibetan normotensive groups in the distributions of the allele and genotype frequencies of the A-6G variant. The frequency of the G allele was 0.29 and 0.17 in the Tibetan normotensive and Han groups, respectively (p<0.001). The G allele of the A-6G variant was associated with hypertension in the Tibetan females, but not in the Yi or Han females. And we confirmed that there was a significant difference in the prevalence of the allele frequencies of the A-6G variant between the Han and Tibetan normotensive groups.
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