Oestrogens as apoptosis regulators in mammalian testis: angels or devils?

Area of Science:

• Reproductive Biology
• Endocrinology
• Cell Biology

Background:

• Spermatogenesis, the process of sperm development in mammals, is regulated by sex steroid hormones.
• Germ cell survival and apoptosis are critical for maintaining the quality and quantity of sperm.
• Oestrogens are increasingly recognized as key regulators of germ cell fate, but their precise role remains debated.

Purpose of the Study:

• To review the current understanding of oestrogens' role in controlling germ cell death.
• To summarize the signaling pathways involved in oestrogen-induced apoptosis.
• To provide insights for managing infertility associated with hyperoestrogenism.

Main Methods:

• Literature review of studies on oestrogens and germ cell apoptosis.
• Analysis of signaling mechanisms underlying oestrogen's effects on male germ cells.
• Synthesis of clinical findings related to oestrogen levels and male infertility.

Main Results:

• Oestrogens exhibit a controversial dual role in spermatogenesis, acting as both pro-survival and pro-apoptotic factors.
• Elevated oestrogen levels are observed in infertile men, suggesting a detrimental impact.
• Specific signaling pathways mediate oestrogen-induced apoptosis in germ cells.

Conclusions:

• Oestrogens significantly influence germ cell fate, with potential implications for male fertility.
• Understanding oestrogen signaling is vital for developing targeted therapies for male infertility.
• Further research can guide clinical management of hyperoestrogenism-related infertility.