Synthetic Cannabinoid JWH-018 Damaged Sperm in Rats, but Recovery Occurred by 45 Days | Research

The takeaway

The synthetic cannabinoid JWH-018 caused significant sperm damage, reduced testosterone, and testicular tissue degeneration in rats within days, but spermatogenesis partially recovered 45 days after cessation.

Young men using synthetic cannabinoids, reproductive health researchers

Sperm damage occurred in days; partial recovery by day 45

What the researchers found

JWH-018 (0.3 mg/kg for 9 days) caused significantly decreased sperm concentration, motility, and membrane integrity, reduced testosterone, increased abnormal sperm morphology, and seminiferous tubule degeneration. At 45 days post-treatment, sperm concentration, motility, and testosterone increased, suggesting partial recovery of spermatogenesis.

Why it matters

Synthetic cannabinoids are widely used by young adults. This study provides evidence that JWH-018 damages male reproductive function but, reassuringly, that some recovery occurs after cessation.

The numbers in context

30 rats; 0.3 mg/kg JWH-018 for 9 days; decreased sperm concentration, motility, and testosterone at day 2; partial recovery at day 45; increased oxidative stress markers

How the study worked

30 male CD-1 rats in 6 groups: control, ethanol vehicle, and JWH-018, each evaluated at 2 days or 45 days after the last injection. Sperm parameters, testosterone, oxidative stress markers, and testicular histopathology assessed.

What this study cannot tell us

Animal study with a single JWH-018 dose for 9 days. Human use patterns may differ significantly. Only 5 rats per group limits statistical power. Recovery at 45 days may be partial, not complete.

How to read the evidence

Small animal study (5 per group) with clear results but limited by sample size and single dose/duration.

When this study was published

Published in 2022

The bigger picture

As synthetic cannabinoid use continues, understanding reproductive effects is important for young men. The recovery finding is somewhat reassuring but the extent of permanent damage remains unclear.

Questions still open

Does longer or higher-dose JWH-018 exposure cause irreversible damage? Do other synthetic cannabinoids produce similar reproductive effects?

Common questions

Do synthetic cannabinoids affect male fertility?

In rats, JWH-018 significantly reduced sperm concentration, motility, and testosterone while causing testicular tissue damage. Some recovery occurred 45 days after stopping the drug.

Is the sperm damage permanent?

This study found partial recovery of sperm parameters and testosterone levels 45 days after stopping JWH-018 treatment, suggesting some damage is reversible. However, the extent of permanent effects is unclear.

Read the original research

Effects of synthetic (JWH-018) cannabinoids treatment on spermatogenesis and sperm function.

Drug and chemical toxicology, 45(1), 215-222

View on PubMed ↗Publisher’s paper ↗

Citation

Mutluay, Duygu; Güngör, Şükrü; Tenekeci, Gözde Yücel; Köksoy, Serkan; Çoban, Cennet Sinem. (2022). Effects of synthetic (JWH-018) cannabinoids treatment on spermatogenesis and sperm function.. Drug and chemical toxicology, 45(1), 215-222. https://doi.org/10.1080/01480545.2019.1680686