The cannabinoid agonist CB-13 produces peripherally mediated analgesia in mice but elicits tolerance and signs of central nervous system activity with repeated dosing

Copyright © 2021 International Association for the Study of Pain..

ABSTRACT: Activation of cannabinoid receptor type 1 (CB 1 ) produces analgesia in a variety of preclinical models of pain; however, engagement of central CB 1 receptors is accompanied by unwanted side effects, such as psychoactivity, tolerance, and dependence. Therefore, some efforts to develop novel analgesics have focused on targeting peripheral CB 1 receptors to circumvent central CB 1 -related side effects. In the present study, we evaluated the effects of acute and repeated dosing with the peripherally selective CB 1 -preferring agonist CB-13 on nociception and central CB 1 -related phenotypes in a model of inflammatory pain in mice. We also evaluated cellular mechanisms underlying CB-13-induced antinociception in vitro using cultured mouse dorsal root ganglion neurons. CB-13 reduced inflammation-induced mechanical allodynia in male and female mice in a peripheral CB 1 -receptor-dependent manner and relieved inflammatory thermal hyperalgesia. In cultured mouse dorsal root ganglion neurons, CB-13 reduced TRPV1 sensitization and neuronal hyperexcitability induced by the inflammatory mediator prostaglandin E 2 , providing potential mechanistic explanations for the analgesic actions of peripheral CB 1 receptor activation. With acute dosing, phenotypes associated with central CB 1 receptor activation occurred only at a dose of CB-13 approximately 10-fold the ED 50 for reducing allodynia. Strikingly, repeated dosing resulted in both analgesic tolerance and CB 1 receptor dependence, even at a dose that did not produce central CB 1 -receptor-mediated phenotypes on acute dosing. This suggests that repeated CB-13 dosing leads to increased CNS exposure and unwanted engagement of central CB 1 receptors. Thus, caution is warranted regarding therapeutic use of CB-13 with the goal of avoiding CNS side effects. Nonetheless, the clear analgesic effect of acute peripheral CB 1 receptor activation suggests that peripherally restricted cannabinoids are a viable target for novel analgesic development.

Medienart:

E-Artikel

Erscheinungsjahr:

2022

Erschienen:

2022

Enthalten in:

Zur Gesamtaufnahme - volume:163

Enthalten in:

Pain - 163(2022), 8 vom: 01. Aug., Seite 1603-1621

Sprache:

Englisch

Beteiligte Personen:

Slivicki, Richard A [VerfasserIn]
Yi, Jiwon [VerfasserIn]
Brings, Victoria E [VerfasserIn]
Huynh, Phuong Nhu [VerfasserIn]
Gereau, Robert W [VerfasserIn]

Links:

Volltext

Themen:

9XRJ6055XT
Analgesics
Cannabinoid Receptor Agonists
Journal Article
Naphthalen-1-yl-(4-pentyloxynaphthalen-1-yl)methanone
Naphthalenes
Receptor, Cannabinoid, CB1
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't

Anmerkungen:

Date Completed 19.07.2022

Date Revised 18.08.2023

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1097/j.pain.0000000000002550

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM334976081