Monogenic forms of human hypertension.

Area of Science:

• Genetics
• Cardiovascular Physiology
• Endocrinology

Background:

• Monogenic disorders have significantly advanced understanding of hypertension.
• Syndromes of low blood pressure further expand this knowledge base.
• Insights into mineralocorticoid-induced hypertension stem from conditions like glucocorticoid-remediable aldosteronism and apparent mineralocorticoid excess.

Purpose of the Study:

• To review the impact of Mendelian disorders on understanding blood pressure regulation.
• To highlight key genetic discoveries in hypertension and hypotension.
• To discuss the implications of mutations in mineralocorticoid receptor and epithelial sodium channel (ENaC).

Main Methods:

• Review of genetic studies on monogenic blood pressure disorders.
• Analysis of mutations in the mineralocorticoid receptor and ENaC.
• Description of genetic loci and genes associated with Gordon's syndrome and brachydactyly hypertension.

Main Results:

• Mutations in the mineralocorticoid receptor can alter its function, leading to hypertension.
• Gain-of-function mutations in ENaC subunits cause Liddle's syndrome (hypertension).
• Loss-of-function mutations in ENaC subunits cause pseudohypoaldosteronism type I (hypotension).
• Gordon's syndrome (pseudohypoaldosteronism type II) is linked to WNK kinase family genes.
• Autosomal-dominant hypertension with brachydactyly may represent a novel neural hypertension mechanism.

Conclusions:

• Mendelian disorders provide critical insights into blood pressure homeostasis.
• Genetic variations in key channels and receptors profoundly impact blood pressure.
• Further research into these disorders promises deeper understanding of cardiovascular control.