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Related Experiment Video

Updated: May 25, 2026

Ex vivo Culture of Drosophila Pupal Testis and Single Male Germ-line Cysts: Dissection, Imaging, and Pharmacological Treatment

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Published on: September 11, 2014

Estrogens in male germ cells.

Serge Carreau¹, Helene Bouraima-Lelong, Christelle Delalande

¹University Caen Basse Normandie; Caen, France.

Spermatogenesis

|February 10, 2012

Summary

Male germ cells are a significant source and target of estrogens in the testis, impacting sperm production and male reproductive development. This highlights potential risks from estrogenic endocrine disruptors.

Area of Science:

Reproductive Biology
Endocrinology
Cell Biology

Background:

Mammalian testes perform steroid biosynthesis and spermatogenesis, regulated by gonadotropins and local factors.
Estrogens are produced in the testis via androgen conversion by aromatase.
Recent findings indicate male germ cells as a novel source of testicular estrogens.

Purpose of the Study:

To investigate the role of male germ cells as a source and target of estrogens within the mammalian testis.
To elucidate the impact of estrogen signaling on germ cell development and spermatogenesis.

Main Methods:

Analysis of estrogen production and receptor localization within testicular tissues.
Investigation of G protein-coupled receptor 30 (GPR30) function in response to estradiol.

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Assessment of effects on cell cycle regulators and apoptosis pathways.

Main Results:

Estrogen receptors (ER) are predominantly located in spermatids.
GPR30 activation by estradiol influences cyclins and BAX, affecting germ cell cycle progression and apoptosis.
Germ cells are identified as both the primary source and target of estrogens in the testis.

Conclusions:

Germ cells play a crucial role in testicular estrogen production and signaling.
Estrogen signaling in germ cells is vital for normal male gonadal development and spermatogenesis, particularly spermiogenesis.
Estrogenic endocrine disruptors may adversely affect male reproductive tract development and function.