A Systematic Review and Integrated Bioinformatic Analysis on the Gene Expression of Cumulus-Oocyte Complex Following...

Area of Science:

• Reproductive Biology
• Genetics
• Molecular Biology

Background:

• Infertility affects a growing global population, with genetic factors playing a significant role.
• Assisted reproductive technologies like in vitro fertilization (IVF) and in vitro maturation (IVM) are crucial for conception.
• The molecular mechanisms underlying infertility and oocyte maturation require further elucidation.

Purpose of the Study:

• To systematically review and elucidate gene expression profiles of cumulus cells following IVM.
• To investigate the implications of these gene expression changes for reproductive outcomes.
• To identify key molecular pathways involved in infertility and assisted reproduction.

Main Methods:

• Systematic literature review following PRISMA guidelines.
• Inclusion of four human clinical studies (2013-2022) using qPCR and RNA sequencing.
• Analysis of gene expression in cumulus cells pre- and post-IVM and between IVF and IVM groups.

Main Results:

• Identified 22 differentially expressed genes (DEGs), with 10 common DEGs between IVF and IVM matured cumulus-oocyte complexes.
• Protein-protein interaction network analysis revealed complex molecular networks in cumulus cell function.
• Enrichment analysis highlighted DEGs involved in EGF receptor signaling, cell membrane dynamics, cell-cell signaling, and ovarian steroidogenesis.

Conclusions:

• Understanding cumulus cell gene expression is vital for optimizing assisted reproductive technologies.
• Identified molecular pathways provide insights into infertility mechanisms.
• Further research is needed to validate findings and explore therapeutic targets for improved reproductive outcomes.