Microarray profiling of secretory-phase endometrium from patients with recurrent miscarriage

Area of Science:

• Reproductive biology
• Genomics
• Molecular medicine

Background:

• Recurrent miscarriage (RM) affects a significant number of women, and its underlying molecular mechanisms remain incompletely understood.
• Endometrial receptivity plays a crucial role in successful implantation and pregnancy maintenance.

Purpose of the Study:

• To identify differentially expressed genes and biological pathways in the secretory phase endometrium of women with recurrent miscarriage compared to fertile controls.
• To elucidate the molecular basis of endometrial dysfunction in RM.

Main Methods:

• Microarray analysis (Affymetrix GeneChip® ST Array) of endometrial samples from RM patients and fertile subjects.
• Bioinformatic analysis using Partek Genomic Suite for gene expression profiling.
• Quantitative real-time polymerase chain reaction (qPCR) for validation of key genes.
• Gene Set Enrichment Analysis (GSEA) and Pathway Studio for pathway analysis.

Main Results:

• 346 differentially expressed genes identified (175 up-regulated, 171 down-regulated) in RM endometrium (fold change ≥1.5, p<0.005).
• Validation confirmed altered expression of FGF9 (up-regulated) and ITGB3, CSF1, MMP19 (down-regulated).
• 101 signaling pathways implicated, including FGFR3/STAT and CSF1R/STAT pathways, associated with cell adhesion, differentiation, and angiogenesis.

Conclusions:

• Microarray analysis is effective for studying endometrial gene expression in RM.
• Distinct endometrial gene expression profiles in RM patients provide insights into molecular mechanisms.
• Understanding these differences may lead to improved pregnancy outcomes for women with RM.