The synthetic cannabinoid 4F-MDMB-BUTICA caused dose-dependent mortality, deformities, hypoactivity, and altered expression of 19 genes in zebrafish embryos.
Toxicologists, public health officials monitoring novel substances, and zebrafish model researchers.
LC50 of 1.932 mg/L at 120 hours
What the researchers found
LC50: 1.932 mg/L; EC50: 0.960 mg/L at 120 hours. Deformities: spine malformation, pericardial edema, yolk sac edema, delayed development. Hypoactivity in larvae. Gene changes in apoptosis, dopamine, serotonin, GABA, and behavior pathways.
Why it matters
First embryotoxicity data on this new synthetic cannabinoid, revealing multi-system effects that suggest significant developmental risk.
The numbers in context
LC50: 1.932 mg/L; EC50: 0.960 mg/L; 19 genes assessed; 6 concentrations; no acute effects, all effects subacute.
How the study worked
Zebrafish embryos exposed at 0.15-4.80 mg/L. Acute (3-24 hpf) and subacute (3-120 hpf) exposure. Morphology, behavior, and qPCR on 19 genes assessed.
What this study cannot tell us
Zebrafish model limits mammalian translation. Single compound. No THC comparison.
How to read the evidence
Systematic dose-response with multi-level outcomes, but zebrafish model limits human translation.
When this study was published
2025 study with first embryotoxicity data on 4F-MDMB-BUTICA.
The bigger picture
Synthetic cannabinoids emerge faster than safety data. Zebrafish screening provides rapid toxicity flags.
Questions still open
- How does this compare to other synthetic cannabinoids?
- Are zebrafish gene changes relevant to humans?
Common questions
What is 4F-MDMB-BUTICA?
Are synthetic cannabinoids dangerous in pregnancy?
Read the original research
Embryotoxicity Evaluation of Novel Synthetic Cannabinoid 4F-MDMB-BUTICA Using Zebrafish Embryos.
Journal of applied toxicology : JAT, 45(7), 1314-1330
Citation
Kullebi, Berşan; Alat, Ömercan; Aksakal, Özkan; Yılmaztürk, Derya; Lafzi, Ayşe; Şişman, Turgay. (2025). Embryotoxicity Evaluation of Novel Synthetic Cannabinoid 4F-MDMB-BUTICA Using Zebrafish Embryos.. Journal of applied toxicology : JAT, 45(7), 1314-1330. https://doi.org/10.1002/jat.4778
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