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Apparent cortisone reductase deficiency: a functional defect in 11beta-hydroxysteroid dehydrogenase type 1
A Jamieson1, A M Wallace, R Andrew
1Department of Medicine and Therapeutics, Western Infirmary, Glasgow, United Kingdom.
The Journal of Clinical Endocrinology and Metabolism
|October 16, 1999
Summary
This study investigates a rare endocrine disorder in a woman with irregular periods and excess hair growth. The findings suggest a defect in 11beta-hydroxysteroid dehydrogenase type 1 (11beta-HSD1) enzyme activity.
Area of Science:
- Endocrinology
- Metabolic Disorders
- Genetics
Background:
- Oligomenorrhea, hirsutism, and acne can indicate endocrine dysfunction.
- Central obesity and plethoric appearance suggest potential hormonal imbalances.
- Enlarged adrenal glands warrant further investigation into steroidogenesis.
Observation:
- A 36-year-old woman presented with symptoms suggestive of hyperandrogenism and adrenal abnormalities.
- Elevated urinary tetrahydrocortisone and enhanced 5beta-reduction of cortisol metabolites were noted.
- Impaired conversion of cortisone acetate to cortisol, with elevated cortisone levels, was observed post-dexamethasone suppression.
Findings:
- The patient exhibits a functional deficiency in 11beta-hydroxysteroid dehydrogenase type 1 (11beta-HSD1) activity.
- Genetic analysis of the 11beta-HSD1 coding region revealed no mutations.
- The defect is localized to 11beta-HSD1 activity, not 5beta-reductase activity, and may involve regulatory elements or other factors.
Implications:
- This case highlights a potential non-coding region defect or acquired inhibition affecting 11beta-HSD1.
- Understanding 11beta-HSD1 function is crucial for diagnosing and managing related endocrine conditions.
- Further research is needed to elucidate the precise molecular mechanism underlying this enzyme deficiency.