Cytotoxicity of methamphetamine exposure on Sertoli cells: a pilot study with implications for male infertility

Area of Science:

• Reproductive Biology
• Toxicology
• Cell Biology

Background:

• Methamphetamine (Meth) is linked to reduced testicular weight and sperm count, suggesting a role in male infertility.
• Sertoli cells are crucial for spermatogenesis and maintaining the testicular microenvironment.

Purpose of the Study:

• To investigate the effects of Methamphetamine on TM4 Sertoli cell viability, toxicity, proliferation, mitochondrial activity, and blood-testis barrier permeability.
• To differentiate between acute (recreational) and chronic (addiction) Meth exposure impacts on Sertoli cells.

Main Methods:

• TM4 Sertoli cells were exposed to Meth (0.1-100 μM) for acute (24 hours) and chronic (24-96 hours) durations.
• Cell viability, toxicity, and proliferation were assessed using the trypan blue exclusion assay.
• Mitochondrial activity (MA) was measured by the XTT assay, and monolayer permeability was examined using transepithelial electrical resistance (TEER).

Main Results:

• Chronic Meth exposure reduced Sertoli cell viability and increased toxicity in a dose-dependent manner.
• Both acute and chronic Meth exposure suppressed cell division and mitochondrial activity at higher concentrations.
• Methamphetamine exposure disrupted blood-testis barrier permeability, with effects persisting up to 96 hours.

Conclusions:

• Methamphetamine induces male infertility through mechanisms involving Sertoli cell dysfunction and compromised blood-testis barrier integrity.
• Both acute and chronic Meth exposure can have detrimental long-term effects on male reproductive health.
• These findings highlight the significant risk Methamphetamine poses to male fertility, even with short-term exposure.