Aberrant Gene Expression Profiling in Men With Sertoli Cell-Only Syndrome

Area of Science:

• Reproductive Biology
• Genomics
• Immunology

Background:

• Sertoli cell-only syndrome (SCOS) is the most severe form of non-obstructive azoospermia.
• The underlying causes of SCOS are not well understood.

Purpose of the Study:

• To investigate the molecular mechanisms and pathogenesis of SCOS using gene expression data.
• To identify key genes, pathways, and immune cell involvement in SCOS.

Main Methods:

• Analysis of gene expression datasets from SCOS and obstructive azoospermia (OA) testicular tissues.
• Differential gene expression analysis, Gene Ontology (GO) and KEGG pathway enrichment.
• Protein-protein interaction (PPI) network construction and module analysis.
• Prediction of transcription factors (TFs) and kinases.
• Comparison of immune cell infiltration levels between SCOS and OA.

Main Results:

• Identified 1441 differentially expressed genes (DEGs) between SCOS and OA.
• Downregulated DEGs were enriched in cell cycle and reproduction pathways; upregulated DEGs were linked to inflammation.
• Nine hub genes were identified, with six also found in SCOS-specific modules.
• Significantly higher immune cell infiltration observed in SCOS compared to OA, with CD56bright natural killer cells associated with hub genes.

Conclusions:

• Gene expression analysis reveals distinct molecular signatures in SCOS, including impaired cell cycle/reproduction and heightened inflammation.
• Specific hub genes and immune cell infiltration patterns are potentially crucial in SCOS pathogenesis.
• Findings offer novel insights into SCOS etiology and potential therapeutic targets.