ABSTRACT
Background: The renin–angiotensin–aldosterone (RAA) system regulates blood pressure (BP) levels and influences responses to antihypertensive medications. Variation in RAA system genes has been reported to influence interindividual differences in BP levels and the occurrence of hypertension (HTN).
Methods: We evaluated the relationship between variation in genes of the RAA system and interindividual differences in BP response to a thiazide diuretic. Analyses were carried out in a race- and gender-specific manner in 255 unrelated hypertensive African-Americans (125 men and 130 women) and 246 unrelated hypertensive non-Hispanic Whites (133 men and 113 women).
Results: The angiotensin II receptor (AT1R) A1166C and angiotensinogen G-6A polymorphisms had a significant effect on systolic BP response to the diuretic in African-American women. Multilocus analyses indicated that the effects of these genes combined additively to influence response. Results of a permutation test to adjust for multiple comparisons and the possible nonindependence among genotypes remained significant at the P=0.003 level.
Conclusions: Among African-American women, particular gene variations in the RAA system have additive effects on BP response to a thiazide diuretic.
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Acknowledgements
This work was supported by the US Public Health Service grants R01-HL5330, M01-RR00039, M01-RR00585, Grant No. 07574-01 from the National Institute for Nursing Research, National Institutes of Health, and funds from the Mayo Foundation.
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Frazier, L., Turner, S., Schwartz, G. et al. Multilocus effects of the renin–angiotensin–aldosterone system genes on blood pressure response to a thiazide diuretic. Pharmacogenomics J 4, 17–23 (2004). https://doi.org/10.1038/sj.tpj.6500215
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DOI: https://doi.org/10.1038/sj.tpj.6500215
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