Analysis of factors affecting testicular spermatogenesis capacity by using the tissue transcriptome data from GTEx

Area of Science:

• Reproductive Biology
• Genomics
• Biochemistry

Background:

• Male fertility is influenced by various internal and external factors affecting testicular function.
• Testicular spermatogenesis capacity can be impaired by changes in cellular composition, micro-environments, and metabolic balance.
• Testicular transcriptome alterations may serve as indicators of spermatogenesis capacity and causative factors.

Purpose of the Study:

• To analyze transcriptome differences in human testes and identify factors affecting spermatogenesis.
• To explore the correlation between whole blood and testicular transcripts related to male fertility.
• To discover potential molecular targets for improving male fertility.

Main Methods:

• Utilized transcriptome data from the Genotype-Tissue Expression (GTEx) project for human testes and whole blood.
• Performed transcriptome analysis to cluster testes based on transcriptomic features and evaluate spermatogenesis capacity.
• Conducted correlation tests between whole blood transcripts and testicular function.

Main Results:

• Human testes clustered into five groups, indicating varying spermatogenesis capacities.
• Identified high-rank and differentially expressed genes in testes with lower functional capacity.
• Discovered associations between spermatogenesis and factors like immune response, oxygen transport, thyrotropin, prostaglandin, and neurotensin through blood transcript analysis.

Conclusions:

• Testicular transcriptome analysis provides insights into spermatogenesis regulation.
• Blood-based transcriptomic markers show potential for assessing male fertility.
• Identified factors offer novel therapeutic targets for enhancing male reproductive health.