Synthetic cannabinoid users showed elevated DNA damage, oxidative stress, and inflammation markers | Research

The takeaway

Compared to healthy controls, 40 synthetic cannabinoid users in Turkey showed significantly higher DNA damage in white blood cells, increased oxidative stress markers, and elevated inflammatory cytokines (IL-1-beta, IL-6, and TNF-alpha).

Toxicologists, harm reduction advocates, and clinicians treating synthetic cannabinoid users.

DNA damage, oxidative stress, and 3 inflammatory markers all elevated

What the researchers found

Synthetic cannabinoid users had significantly higher DNA damage, plasma oxidant status, myeloperoxidase activity, and inflammatory markers (IL-1-beta, IL-6, TNF-alpha). Antioxidant capacity (TAS) and thiol levels were significantly lower, indicating depleted antioxidant defenses.

Why it matters

While synthetic cannabinoid toxicity has been documented through case reports, this study provides systematic biomarker evidence that regular use causes measurable oxidative stress, DNA damage, and chronic inflammation.

The numbers in context

40 synthetic cannabinoid users studied. Significantly higher: DNA damage, TOS, MPO, disulfide, IL-1-beta, IL-6, TNF-alpha. Significantly lower: TAS, total thiol, native thiol.

How the study worked

Case-control study comparing 40 synthetic cannabinoid users to healthy controls in Turkey. Measurements included comet assay for DNA damage, total oxidant/antioxidant status, thiol-disulfide balance, myeloperoxidase activity, and cytokine levels from blood samples.

What this study cannot tell us

Small sample size (40 users). Cross-sectional design cannot determine whether biomarker changes are reversible after cessation. The specific synthetic cannabinoids used were not identified. Lifestyle confounders may not be fully controlled.

How to read the evidence

Moderate: controlled comparison with multiple biomarkers, though limited by small sample and cross-sectional design.

When this study was published

Published in 2020 in Human & Experimental Toxicology.

The bigger picture

The combination of DNA damage, oxidative stress, and inflammation in active users suggests synthetic cannabinoids may have long-term health consequences beyond acute toxicity, potentially including cancer risk from the DNA damage.

Questions still open

Do these biomarker changes reverse after stopping synthetic cannabinoid use? Do natural cannabis users show similar patterns? Does the DNA damage translate to increased cancer risk over time?

Common questions

What kind of DNA damage was found?

The comet assay showed increased primary DNA strand breaks in the white blood cells of synthetic cannabinoid users. This type of damage, if not repaired, could potentially contribute to mutations and disease over time.

Is this the same as natural cannabis?

This study only tested synthetic cannabinoid users. Synthetic cannabinoids are chemically distinct from natural THC and often far more potent. Whether natural cannabis produces similar oxidative stress and DNA damage is a separate question.

Read the original research

Investigation of DNA damage, oxidative stress, and inflammation in synthetic cannabinoid users.

Human & experimental toxicology, 39(11), 1454-1462

View on PubMed ↗Publisher’s paper ↗

Citation

Guler, E M; Bektay, M Y; Akyildiz, A G; Sisman, B H; Izzettin, F V; Kocyigit, A. (2020). Investigation of DNA damage, oxidative stress, and inflammation in synthetic cannabinoid users.. Human & experimental toxicology, 39(11), 1454-1462. https://doi.org/10.1177/0960327120930057