To understand the differential gene expression in granulosa and cumulus cells from women with varying ovarian responsiveness to controlled ovarian hyperstimulation (COH) during IVF treatment, emphasizing the role of cumulus cells.
Approach:
Key Findings:
291 genes were downregulated in G + CCs from poor ovarian responders (PORs) compared to normal ovarian responders (NORs), including AURKB, BUB1, and BRCA1.
Downregulated genes were enriched for pro-proliferation functions and DNA damage-response categories.
Upregulated genes in POR G + CCs included those linked to apoptosis and ovarian malignancy, such as ANGPTL4 and IL1RL1.
Weighted gene co-expression network analysis identified 6 gene modules correlated with the POR phenotype.
Core genes associated with weak ovarian responsiveness included those involved in folliculogenesis, steroidogenesis, and cell-cycle regulation.
Interpretation:
The study provides insights into the molecular mechanisms underlying weak ovarian responses and identifies potential candidate genes and signaling pathways that could improve IVF outcomes.
Limitations:
The study focused on a limited sample size of 16 patients, necessitating further validation of identified genes and pathways.
Future studies should include a more diverse patient demographic to enhance generalizability.
Conclusion:
The findings offer potential insights into the pathophysiologic processes underlying weak ovarian responses and identify candidate genes that could help define weak ovarian responders, ultimately aiming to improve IVF success rates.
A Beyond the Guidelines discussion highlighted uncertainty around gastrointestinal evaluation and intravenous iron use in premenopausal women with iron deficiency.
