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Related Experiment Video

Updated: Jun 22, 2026

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities
12:33

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities

Published on: November 15, 2013

[Not Available].

F Kuttenn1, P Mauvais-Jarvis

  • 1Service d'Endocrinologie et de Gynécologie Médicale, Hôpital Necker, 149 rue de Sèvres, 75730 Paris Cedex 15, France.

International Journal of Cosmetic Science
|May 28, 2009
PubMed
Summary
This summary is machine-generated.

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Human skin metabolizes androgens, converting inactive steroids into testosterone and then to 5alpha-DHT. This process is crucial for male development and secondary sex characteristics, with varying regulation by anatomical site and androgens.

Area of Science:

  • Endocrinology
  • Dermatology
  • Biochemistry

Background:

  • Androgen metabolism in human skin is vital for male hormone action on skin structures.
  • Skin converts inactive steroids (e.g., androstenedione, dehydroisoandrosterone) to active testosterone.
  • Testosterone is further reduced to 5alpha-DHT, essential for male differentiation and pubertal hair growth.

Purpose of the Study:

  • To elucidate the role and regulation of androgen metabolism in human skin.
  • To understand the differential regulation of 5alpha-reductase activity in various anatomical sites and developmental stages.
  • To provide insights into the action of anti-androgens, particularly those for topical use.

Main Methods:

  • The study focuses on the biochemical transformations of androgens within skin tissue.

Related Experiment Videos

Last Updated: Jun 22, 2026

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities
12:33

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities

Published on: November 15, 2013

  • It examines the regulation of 5alpha-reductase activity in fetal and adult skin, considering androgen dependency.
  • Comparative analysis of enzyme activity across different anatomical sites and sexes is implied.

    • Main Results:

    • Human skin possesses enzymes to convert androgens to testosterone and subsequently to 5alpha-DHT.
    • 5alpha-reductase activity shows site-specific and developmental variations; it's androgen-independent in fetal urogenital tract but androgen-dependent for secondary sex characteristics.
    • Differences in 5alpha-reductase regulation explain variations in skin androgen activity observed in adults.

    Conclusions:

    • Androgen metabolism in skin is complex, with distinct regulatory mechanisms for primary and secondary sexual development.
    • Understanding these pathways is key to comprehending skin's response to androgens and anti-androgens.
    • Site-specific regulation of 5alpha-reductase influences androgen effects in different skin areas.