Abstract
A C825T polymorphism of the gene encoding the G protein β3 subunit (GNB3) is associated with enhanced G protein activity and increased intracellular signal transduction. The 825T allele has been implicated in the development of hypertension in some ethnic groups, especially in whites. Studies in Asians and blacks are more controversial, and little information is available on this polymorphism in the susceptibility to hypertension in the Chinese population. Furthermore, the inconsistency between studies may be due to genetic heterogeneity of the population selected and/or the lack of statistical power. We investigated the relationship of this polymorphism with hypertension in two independent northern Chinese populations using both a case-control and a family-based study design. The GNB3 C825T polymorphism was determined by polymerase chain reaction and restriction enzyme digestion. In the case-control study which included 585 hypertensive case subjects and 580 normotensive control subjects there was no significant association between the polymorphism and hypertension status or blood pressure levels. The lack of association was confirmed by the results obtained in 181 hypertensive families using both transmission disequilibrium test and sib transmission disequilibrium test. No preferential transmission was observed for the GNB3 825T allele to the affected subjects. Furthermore, there was no significant association between the polymorphism and body mass index in the case-control study. Therefore our work does not provide evidence in favor of GNB3 C825T being a candidate gene for conferring genetic susceptibility to hypertension or obesity in northern Chinese population.
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Abbreviations
- TDT:
-
Transmission/disequilibrium test
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Acknowledgements
We gratefully acknowledge the collaboration of Max Delbruck Center in Berlin, Germany. We are deeply indebted to Prof. Klaus Lindpaintner (Roche Genetics and Roche Center for Medical Genomics) and Dr. Peter Nuernberg (Gene Mapping Center, MDC) for continuous support and invaluable help.
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Huang, X., Ju, Z., Song, Y. et al. Lack of association between the G protein β3 subunit gene and essential hypertension in Chinese: a case-control and a family-based study. J Mol Med 81, 729–735 (2003). https://doi.org/10.1007/s00109-003-0482-3
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DOI: https://doi.org/10.1007/s00109-003-0482-3