Abstract：
:Aldosterone plays an important role in electrolyte and blood pressure homeostasis. Our studies have focused on the role of aldosterone in essential hypertension. We have shown that plasma aldosterone and ARR are heritable characteristics and that aldosterone concentrations in older subjects are inversely correlated with birthweight and positively correlated with blood pressure. Aldosterone levels are also associated with polymorphic variation in the CYP11B2 gene, which encodes aldosterone synthase, the enzyme responsible for aldosterone production. Interestingly, CYP11B2 polymorphisms are also associated with less efficient activity of 11beta-hydroxylase, encoded by the neighbouring, highly homologous CYP11B1 gene. We propose that a digenic effect leads to increased aldosterone production, with inefficient 11beta-hydroxylation causing a long-term increase in ACTH drive to the adrenal gland and enhanced expression of CYP11B2, thereby resulting in chronically raised aldosterone secretion in response to factors such as angiotensin II and potassium. In susceptible subjects this is likely, over many years, to result in hypertension with relative aldosterone excess.
journal_name
Mol Cell Endocrinoljournal_title
Molecular and cellular endocrinologyauthors
Davies E,Mackenzie SM,Freel EM,Alvarez-Madrazo S,Fraser R,Connell JMdoi
10.1016/j.mce.2008.09.014subject
Has Abstractpub_date
2009-03-05 00:00:00pages
185-91issue
1-2eissn
0303-7207issn
1872-8057pii
S0303-7207(08)00413-9journal_volume
300pub_type
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