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Glucocorticoid-remediable aldosteronism

G H Williams1, R G Dluhy

  • 1Harvard Medical School, Boston, MA, USA.

Journal of Endocrinological Investigation
|July 1, 1995
PubMed
Summary

Genetic testing precisely identifies glucocorticoid remediable aldosteronism (GRA), an inherited disorder. Screening hypertensive patients with low renin activity can detect GRA for targeted treatment.

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Area of Science:

  • Endocrinology
  • Genetics
  • Hypertension Research

Background:

  • Glucocorticoid remediable aldosteronism (GRA) is an inherited disorder of aldosterone biosynthesis.
  • All known GRA cases result from chimeric gene duplications, fusing the 11-beta hydroxylase gene's regulatory region with aldosterone synthase gene sequences.
  • This genetic anomaly leads to ectopic aldosterone synthase expression in fasciculata cells.

Purpose of the Study:

  • To highlight the diagnostic precision of genetic testing for GRA.
  • To suggest that GRA may be more prevalent in hypertensive populations than previously thought.
  • To propose targeted genetic screening for identifying GRA patients within specific hypertensive subgroups.

Main Methods:

  • Genetic testing for chimeric gene duplications.
  • Monitoring 18-oxygenated cortisol products as a biomarker.
  • Clinical evaluation of hypertensive patients with signs of aldosteronism and low plasma renin activity.

Main Results:

  • Genetic testing demonstrates 100% concordance between the chimeric gene and elevated 18-oxygenated cortisol products.
  • This precision allows for accurate identification of individuals with GRA.
  • The findings suggest GRA may be underdiagnosed in the hypertensive population.

Conclusions:

  • Genetic screening for GRA is recommended in hypertensive patients with signs of aldosteronism, particularly young individuals with low renin activity.
  • Early identification enables specific treatment strategies for GRA.
  • An international registry has been established for tracking treatment success and providing patient/physician resources.

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