Causal relationship between OHSS and immune cells: A Mendelian randomization study.

Area of Science:

• Immunology
• Genetics
• Reproductive Medicine

Background:

• Ovarian Hyperstimulation Syndrome (OHSS) is a serious complication of assisted reproductive technologies.
• The precise causal factors, particularly the role of immune cells, remain incompletely understood.

Purpose of the Study:

• To investigate the potential causal relationship between various immune cell phenotypes and the risk of developing OHSS.
• To explore bidirectional causality between immune cells and OHSS using genetic data.

Main Methods:

• A two-sample Mendelian randomization study design was employed.
• Utilized genome-wide association study (GWAS) data for immune cell phenotypes (22 million SNPs) and OHSS.
• Applied inverse variance weighting, MR-Egger, and weighted median methods to assess causality.

Main Results:

• Nine distinct immunophenotypes showed a statistically significant association with OHSS risk after False Discovery Rate correction.
• Significant associations were observed across B cell, mature T cell, myeloid cell, monocyte, and conventional dendritic cell panels.
• Specific cell markers and their odds ratios (OR) indicate varying degrees of association with OHSS risk.

Conclusions:

• This genetic study provides evidence for a potential causal link between specific immune cell profiles and OHSS.
• The findings offer novel insights for future clinical and basic research into OHSS pathogenesis and potential therapeutic targets.