FGF21 counteracts alcohol intoxication by activating the noradrenergic nervous system.
Level 5 - mechanism / opinion, no new human data
Preclinical animal model and mechanistic study
PubMed 36889282 · doi:10.1016/j.cmet.2023.02.005
What was done
Researchers examined the role of the liver-derived hormone FGF21 in ethanol intoxication using mouse models. They compared the time required to recover the righting reflex and motor balance after ethanol exposure in FGF21-knockout mice versus wild-type littermates. They also tested the effect of administering pharmacological FGF21 on recovery times from ethanol-induced unconsciousness and ataxia, assessed specificity by testing other sedatives (ketamine, diazepam, and pentobarbital), and evaluated ethanol catabolism and the neural pathway in the locus coeruleus.
What was found
No numerical values, doses, or sample sizes were reported in the abstract. Qualitatively, ethanol induced FGF21 in murine and human liver. Mice lacking FGF21 required more time than wild-type littermates to recover balance and righting reflexes after ethanol exposure. Exogenous FGF21 shortened the duration of ethanol-induced unconsciousness and ataxia without changing ethanol catabolism. This sobering effect did not occur with sedation induced by ketamine, diazepam, or pentobarbital, and the mechanism was found to involve direct activation of noradrenergic neurons in the locus coeruleus.
Why it matters
This study defines an endogenous liver-to-brain pathway mediating arousal from ethanol intoxication. It identifies FGF21 and locus coeruleus noradrenergic signaling as potential targets for therapeutic intervention in acute alcohol poisoning.
Limits
All behavioral and mechanistic intervention data are restricted to mouse models, with human data limited to the observation of ethanol-induced liver expression. The abstract reports no numerical data, effect sizes, variance measures, or sample sizes. Safety, pharmacokinetics, and clinical efficacy in humans suffering from acute alcohol poisoning were not evaluated.
Cited by
- supports FGF21 protects against alcohol intoxication.