Xylazine is an agonist at kappa opioid receptors and exhibits sex-specific responses to opioid antagonism

Original research
par
Bedard, Madigan et al

Date de publication

2024

Géographie

USA

Langue de la ressource

English

Texte disponible en version intégrale

Oui

Open Access / OK to Reproduce

Oui

Évalué par des pairs

Yes

L’objectif

This study examines the impact of xylazine alone and in combination with fentanyl on several behaviors in mice.

Constatations/points à retenir

Surprisingly, naloxone precipitates withdrawal from xylazine and fentanyl/xylazine coadministration, with enhanced sensitivity in female mice. Further, xylazine is a full agonist at kappa opioid receptors, a potential mechanism for its naloxone sensitivity. Finally, we demonstrate surprising effects of xylazine to kappa opioid antagonism, which are relevant for public health considerations. 

Mots clés

Illegal drugs
Mortality
Outcomes
Overdose
Withdrawal