COVID-19 inhibits spermatogenesis in the testes by inducing cellular senescence

Area of Science:

• Reproductive Biology
• Virology
• Genomics

Background:

• COVID-19 (SARS-CoV-2) is associated with widespread organ damage.
• Clinical studies indicate COVID-19 can cause significant sperm damage.
• The precise mechanisms underlying COVID-19-induced sperm damage remain unclear.

Purpose of the Study:

• To investigate the molecular mechanisms by which COVID-19 impacts spermatogenesis.
• To identify key pathways involved in COVID-19-related testicular dysfunction.
• To explore potential therapeutic targets for mitigating COVID-19's effects on male fertility.

Main Methods:

• Utilized bulk RNA-sequencing data from testicular tissues of COVID-19 patients and healthy controls.
• Employed bioinformatic analyses to assess gene and pathway expression.
• Examined correlations between genes and pathways to understand molecular interactions.

Main Results:

• COVID-19 infection induces testicular cell senescence, primarily through the MAPK signaling pathway.
• Cellular senescence synergizes with the MAPK pathway, disrupting cholesterol and androgen synthesis.
• Normal production of lactate and pyruvate is inhibited, ultimately impairing spermatogenesis.

Conclusions:

• COVID-19 negatively impacts spermatogenesis via induction of testicular cell senescence and MAPK pathway dysregulation.
• This pathway disruption affects crucial metabolic and hormonal processes necessary for sperm production.
• Targeting the MAPK signaling pathway, specifically MAPK1 and MAPK14, presents a promising therapeutic strategy for COVID-19-induced male infertility.