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Kurland, L. et al.

Kurland, Melhus, Karlsson, Kahan, Malmqvist, Ohman, Nyström, Hägg, Lind,

Aldosterone synthase (CYP11B2) -344 C/T polymorphism is related to antihypertensive response: result from the Swedish Irbesartan Left Ventricular Hypertrophy Investigation versus Atenolol (SILVHIA) trial.

BACKGROUND: Our aim was to determine whether the aldosterone synthase (CYP11B2) -344 C/T polymorphism was associated with the blood pressure (BP)-lowering response to antihypertensive treatment. METHODS: Patients with mild-to-moderate primary hypertension and left ventricular hypertrophy were randomized in a double-blind study to receive treatment with either the angiotensin II type 1 (AT1) receptor antagonist irbesartan (n = 43), or the beta1-adrenergic receptor blocker atenolol (n = 43). The aldosterone synthase (CYP11B2) -344 C/T polymorphism was analyzed using solid-phase minisequencing and related to BP reduction after 3 months treatment. Serum aldosterone levels were measured. RESULTS: After 3 months treatment the mean reductions in BP were similar for both treatment groups. When assessing the systolic BP reduction in the irbesartan group, patients with the TT variant had a more pronounced reduction (-21 +/- 19 SD mm Hg, n = 17) than both the TC (-14 +/- 18 mm Hg, n= 18) and CC (0 +/- 17 mm Hg, n = 8) genotypes (P = .04). There was no association between this polymorphism and the diastolic BP response. The -344 C/T polymorphism was not associated with the BP response to atenolol. Nor was it related to the baseline serum aldosterone level. CONCLUSIONS: The aldosterone synthase -344 C/T polymorphism was related to the BP-lowering response in hypertensive patients treated with the AT1-receptor antagonist irbesartan.[1]

References

Aldosterone synthase (CYP11B2) -344 C/T polymorphism is related to antihypertensive response: result from the Swedish Irbesartan Left Ventricular Hypertrophy Investigation versus Atenolol (SILVHIA) trial. Kurland, L., Melhus, H., Karlsson, J., Kahan, T., Malmqvist, K., Ohman, P., Nyström, F., Hägg, A., Lind, L. Am. J. Hypertens. (2002) [Pubmed]

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