Chloride Channel Accessory 4 (CLCA4) Gene Polymorphisms and Non-Obstructive Azoospermia: A Case-Control Study

Area of Science:

• Genetics
• Reproductive Medicine
• Bioinformatics

Background:

• Male infertility, particularly non-obstructive azoospermia (NOA), has known genetic links, but specific gene associations remain unclear.
• Mutations in the chloride channel accessory 4 (CLCA4) gene are implicated in male infertility.

Purpose of the Study:

• To investigate the association between single nucleotide polymorphisms (SNPs) of the CLCA4 gene and NOA.
• To analyze CLCA4 gene variations in a Chinese Han population from Northeast China using next-generation sequencing and bioinformatics.

Main Methods:

• Targeted gene capture next-generation sequencing and bioinformatics analysis were employed.
• Ten CLCA4 SNPs were screened in 100 men with NOA and 100 healthy controls.
• Allele, genotype, and haplotype frequencies were analyzed for associations with NOA.

Main Results:

• Six CLCA4 SNPs were identified in NOA cases but not controls; however, allele and genotype frequencies did not differ significantly between groups.
• All analyzed CLCA4 SNPs were in Hardy-Weinberg equilibrium.
• Haplotype analysis revealed two haplotypes with marginal statistical significance (p=0.074, p=0.088) between NOA cases and controls.

Conclusions:

• No significant associations were found between CLCA4 gene SNPs and non-obstructive azoospermia (NOA) in the studied Chinese Han population.
• The CLCA4 gene does not appear to be a major genetic factor for NOA in this demographic.
• Further research may be needed to explore other genetic factors contributing to NOA.