Infertility network and hub genes for nonobstructive azoospermia utilizing integrative analysis

Area of Science:

• Reproductive Biology
• Genetics
• Molecular Biology

Background:

• Non-obstructive azoospermia (NOA) is the most severe form of male infertility.
• The underlying molecular mechanisms of NOA remain poorly understood.
• Failed spermatogenesis leads to the absence of sperm in ejaculation for NOA patients.

Purpose of the Study:

• To identify dysregulated genes and pathways involved in NOA pathogenesis.
• To uncover potential molecular biomarkers for NOA diagnosis and treatment.
• To explore the differential expression of key genes in various testicular cell types.

Main Methods:

• Gene Ontology (GO) analysis and pathway enrichment analysis were performed.
• Weighted gene co-expression network analysis (WGCNA) was used to construct the NOA gene co-expression network.
• Validation using an independent Gene Expression Omnibus (GEO) dataset (GSE45887) and single-cell RNA sequencing (scRNA-seq) data (GSE106487).

Main Results:

• Significant enrichment of biological processes including spermatogenesis, fertilization, and metabolic pathways.
• Identification of hub genes CHD5 and SPTBN2 through WGCNA.
• Differential expression of CHD5 and SPTBN2 observed in specific testicular cell types from NOA patients.

Conclusions:

• CHD5 and SPTBN2 are identified as crucial genes in NOA pathogenesis.
• These genes may serve as potential biomarkers for NOA diagnosis and therapeutic strategies.
• The study provides novel insights into the molecular basis of non-obstructive azoospermia.