Ovarian Endometrioma Disrupts Oocyte-Cumulus Communication and Mitochondrial Function, With Melatonin Mitigating the...

Area of Science:

• Reproductive Biology
• Endocrinology
• Cellular Biology

Background:

• Ovarian endometrioma (OEM) is a severe endometriosis form linked to infertility.
• Mechanisms of OEM-induced infertility, especially concerning oocyte-cumulus cell (CC) communication, are unclear.

Purpose of the Study:

• Investigate OEM's impact on oocyte-CC communication.
• Explore melatonin as a potential therapeutic agent for OEM-related infertility.

Main Methods:

• Utilized a mouse model of OEM.
• Conducted ovarian transcriptome and gene set enrichment analyses.
• Performed phalloidin staining, gap junction coupling analysis, and mitochondrial function assessments.

Main Results:

• OEM impairs steroidogenesis and CC function, increasing apoptosis and disrupting transzonal projections (TZPs).
• Reduced antioxidant transfer to oocytes leads to oxidative stress and mitochondrial dysfunction.
• OEM oocytes show DNA damage, maturation defects, and aneuploidy.

Conclusions:

• Disrupted TZPs are a key pathological feature in OEM.
• Melatonin may restore intercellular communication and mitigate oxidative damage.
• Melatonin holds potential for improving reproductive outcomes in OEM.