Adrenomedullin (ADM) is a vasodilator and inhibits salt appetite. An A-to-G substitution at position -1984 in the promoter region of the ADM gene likely increases transcription. We therefore investigated this polymorphism in relation to blood pressure and urinary sodium in a Chinese population. We genotyped 427 Chinese enrolled in a family-based population study. We measured blood pressure by conventional sphygmomanometry and ambulatory monitoring. The frequencies of the ADM AA, AG, and GG genotypes were 50.6, 38.2, and 11.2%, respectively. In adjusted analyses, G allele carriers, compared to AA homozygotes, had significantly lower conventional (45.3 versus 48.5 mm Hg, P = 0.004) and 24-h (42.6 versus 44.3 mm Hg, P = 0.03) pulse pressures and urinary sodium excretion (143.8 versus 159.4 mmol/day, P = 0.03). In parents, but not offspring, both systolic pressure and pulse pressure were significantly (P<0.01) lower in G allele carriers. The genotypic difference in sodium excretion was consistent across the age range. In 68 informative offspring, transmission of the G allele was associated with lower urinary sodium excretion (effect size, 40.1 mmol/day, P = 0.01). In 81 healthy volunteers, the plasma ADM concentration was 15.2% higher in GG homozygotes than in sex- and age-matched AA subjects (11.4 versus 9.9 pmol/l, P = 0.10). In conclusion, in Chinese, the ADM -1984G allele is associated with lower sodium excretion and in older subjects also with lower systolic pressure and narrower pulse pressure.
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http://dx.doi.org/10.1038/sj.ki.5000213 | DOI Listing |
Confl Health
January 2025
London School of Hygiene and Tropical Medicine, Department of Non-Communicable Diseases Epidemiology, Keppel street, London, WC1E 7HT, UK.
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Paediatrics, Nutrition and Development Research Unit, Universitat Rovira i Virgili. Reus, Tarragona, Spain.
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Division of Public Health, Hygiene and Epidemiology, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan.
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Department of Ophthalmology, Ege University Faculty of Medicine, 35100, Bornova, Izmir, Türkiye.
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