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Adrenal androgen biosynthesis by a sesterpene pathway.

A D Tait1, L C Hodge

  • 1Department of Obstetrics and Gynaecology, University of Cambridge, Addenbrooke's Hospital, England.

Journal of Steroid Biochemistry
|January 1, 1988
PubMed
Summary

Rat and human adrenal glands can convert a proposed steroid biosynthesis intermediate, 23,24-dinor-5-cholen-3 beta-ol, into androgens like androstenedione and dehydroepiandrosterone.

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Area of Science:

  • Biochemistry
  • Endocrinology
  • Steroidogenesis

Background:

  • Steroid biosynthesis pathways are crucial for producing vital hormones.
  • The sesterterpene pathway is a proposed, less-understood route for steroid production.
  • Understanding alternative pathways is key to comprehending adrenal gland function.

Purpose of the Study:

  • To investigate the role of 23,24-dinor-5-cholen-3 beta-ol in steroid biosynthesis.
  • To determine if rat and human adrenal glands utilize this intermediate for androgen production.
  • To identify the cellular location of this conversion process.

Main Methods:

  • Incubation of rat and human adrenal gland preparations with radioactive cholesterol and 23,24-dinor-5-cholen-3 beta-ol.
  • Isolation and purification of steroids using thin-layer chromatography (TLC).
  • Crystallization of steroids to constant specific activity for accurate measurement.

Main Results:

  • Rat and human adrenal glands successfully utilized 23,24-dinor-5-cholen-3 beta-ol.
  • Production of androstenedione and dehydroepiandrosterone was confirmed.
  • The conversion of the intermediate to androgens occurs within the microsomal fraction.

Conclusions:

  • The sesterterpene pathway can function in mammalian adrenal glands for androgen biosynthesis.
  • Key intermediates of this pathway are converted to androgens in the microsomal fraction.
  • This study provides evidence for the functional relevance of the sesterterpene pathway in humans and rats.

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