Association between aldosterone synthase (CYP11B2) polymorphism and left ventricular mass in human essential hypertension
| Autor: | Cristina Barlassina, Chiara Lanzani, Paola Stella, Giada Bigatti, Giuseppe Bianchi, Daniele Cusi, Laura Tizzoni |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Adult
Male Aldosterone synthase medicine.medical_specialty medicine.drug_class Cardiac fibrosis Heart Ventricles Essential hypertension Muscle hypertrophy chemistry.chemical_compound Internal medicine medicine Cytochrome P-450 CYP11B2 Humans Settore MED/14 - Nefrologia Polymorphism Genetic Aldosterone biology business.industry Middle Aged medicine.disease Fibrosis Endocrinology Blood pressure chemistry Mineralocorticoid Hypertension biology.protein Cardiology Female Hypertrophy Left Ventricular Gene polymorphism business Cardiology and Cardiovascular Medicine |
| Zdroj: | Journal of the American College of Cardiology. 43(2):265-270 |
| ISSN: | 0735-1097 |
| DOI: | 10.1016/j.jacc.2003.08.034 |
| Popis: | Objectives The aim of our study was to evaluate the relationship between aldosterone synthase gene polymorphism and cardiac dimensions in essential hypertension. Background Higher aldosterone synthase messenger ribonucleic acid levels in the human heart are accompanied by increased intracardiac aldosterone production, a phenomenon that is associated with cardiac fibrosis and hypertrophy. Recent evidence suggests that a polymorphism (−344C/T) in the promoter region of the aldosterone synthase gene is associated with increased constitutive aldosterone production. Methods Relationships between M-mode echocardiographic cardiac dimensions and aldosterone synthase −344C/T polymorphism were studied in 210 never-treated, middle-aged patients (age 41.6 ± 1.4 years) affected by mild to moderate essential hypertension. Among these patients, 48 had the genotype −C344C, 97 had −C344T, and 65 had −T344T. Patients in the three groups were similar in terms of age, gender, body mass index, and blood pressure. Results Left ventricular (LV) mass and thickness were positively correlated with the number of T alleles: LV mass (CC, CT, and TT, respectively: 168 ± 6.9, 179 ± 5.2, and 193 ± 6.9 g; p = 0.03), LV septal thickness (0.99 ± 0.02, 1.03 ± 0.02, and 11.08 ± 0.03 cm, p = 0.04), PWT (0.93 ± 0.03, 0.95 ± 0.01, and 1.03 ± 0.02 cm; p = 0.002), and relative wall thickness (38.3 ± 1.2%, 38.8 ± 0.8%, and 42.8 ± 1.1%; p = 0.004). This trend was confirmed by linear regression, suggesting a “major gene” behavior for the T allele. Multiple regression analysis showed that this effect was independent of anthropometric and clinical factors, including adrenal aldosterone. Conclusions Our data suggest that −344C/T polymorphism affects LV mass and thickness in essential hypertension, independent of adrenal aldosterone. A role for intracardiac aldosterone synthesis is hypothesized. |
| Databáze: | OpenAIRE |
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