Melatonin ameliorates paclitaxel-induced mice spermatogenesis and fertility defects

Area of Science:

• Reproductive Biology
• Toxicology
• Molecular Medicine

Background:

• Chemotherapy, including paclitaxel (PTX), can cause male reproductive toxicity.
• The molecular mechanisms underlying PTX-induced male infertility are not fully understood.
• Melatonin (MLT) has shown potential in mitigating chemotherapy-induced reproductive damage.

Purpose of the Study:

• To investigate the impact of PTX on male reproductive processes.
• To evaluate the protective effects of MLT against PTX-induced reproductive damage.
• To elucidate the molecular mechanisms involved in PTX's effects and MLT's protection.

Main Methods:

• Mice were treated with PTX to assess reproductive toxicity.
• Western blot analysis was used to measure protein expression levels (PCNA, SYCP3, DMC1, STRA8, HSPA2).
• In vitro fertilization (IVF) experiments were conducted to evaluate embryo development.

Main Results:

• PTX significantly impaired spermatogenesis, reducing sperm count, motility, and increasing abnormalities.
• PTX decreased the expression of germ cell proliferation (PCNA) and meiosis (SYCP3) proteins.
• MLT treatment ameliorated PTX-induced damage, restoring protein expression and improving sperm quality and blastocyst formation rates.

Conclusions:

• PTX adversely affects germ cell proliferation and meiosis, leading to reduced sperm quality and male fertility.
• MLT demonstrates a protective effect against PTX-induced male reproductive toxicity, particularly on sperm quality.
• This study provides insights into the molecular mechanisms of PTX's reproductive toxicity and MLT's protective role.