Transcriptomic profiling in hypoxia-induced trophoblast cells for preeclampsia

Area of Science:

• Reproductive Biology
• Molecular Biology
• Genomics

Background:

• Preeclampsia (PE) is a serious pregnancy complication with poorly understood pathophysiology.
• Hypoxia in trophoblast cells is implicated in PE development.
• Understanding molecular changes in trophoblast cells under hypoxia is crucial for identifying PE mechanisms.

Purpose of the Study:

• To identify mRNA expression profiles and associated pathways in hypoxia-induced trophoblast cells.
• To elucidate the role of hypoxia in the pathophysiology of preeclampsia.
• To discover potential diagnostic or therapeutic targets for PE.

Main Methods:

• Analysis of gene expression datasets (GSE47187, GSE60432) using GEO2R.
• Functional enrichment analysis with Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG).
• Construction of protein-protein interaction (PPI) networks and identification of hub genes.
• Validation of gene and protein expression using Western blotting, qRT-PCR, and microarray profiling.

Main Results:

• Identification of 224 differentially expressed genes (DEGs) in PE placentas, with activation of the HIF-1 signaling pathway.
• Discovery of 754 DEGs in hypoxia-induced primary trophoblast cells, linked to HIF-1 signaling, hypoxia response, and glucose metabolism.
• Construction of a PPI network revealing 18 key hub genes, validated through qRT-PCR.
• Microarray profiling confirmed DEGs and pathways in hypoxia-treated HTR8/SVneo cells.

Conclusions:

• Hypoxia significantly alters mRNA expression profiles in trophoblast cells.
• The HIF-1 signaling pathway and glucose metabolism are critically involved in hypoxia-induced trophoblast dysfunction relevant to preeclampsia.
• Identified DEGs and hub genes offer potential molecular targets for understanding and managing preeclampsia.