Journal
ANNALS OF HUMAN GENETICS
Volume 69, Issue -, Pages 468-473Publisher
WILEY
DOI: 10.1111/j.1529-8817.2005.00172.x
Keywords
G protein beta 3 subunit gene; haplotype; association study; hypertension
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Recently a novel C825T polymorphism in the G protein beta 3 subunit gene was identified that showed an association with hypertension in a German population; the results of studies in other populations have been inconsistent. To examine the contribution of GNB3 polymorphisms to the development of hypertension in the northern Chinese Han population, we conducted a case-control study consisting of 501 hypertensive cases and 503 controls using the G(-350)A, C825T and C1429T polymorphisms. Genotypes of samples were determined by PCR, and restriction digestion. Single locus analysis showed a significant association between G(-350)A and hypertension (P = 0.01) but no association for C825T or C1429T. The three polymorphisms were in tight linkage disequilibrium (D' = -1 for G(-350)A-C825T, D' = 0.92 for C825T-C1429T) and a total of 7 haplotypes were observed in the entire population. Haplotype A-C-C was found to be significantly related to hypertension (P = 0.032) and A-C-C carriers had a more than two-fold higher risk of hypertension than non-carriers, after adjustment for BMI and glucose. In conclusion, our study suggests that G(-350)A is a potential functional polymorphism that may be related to hypertension, whereas the C825T and C1429T polymorphisms are not associated with hypertension in the northern Chinese Han population.
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