Chronic inflammatory pain drives alcohol drinking in a sex-dependent manner for C57BL/6J mice.

Autor: Yu W; Pharmacology Curriculum, University of North Carolina, Chapel Hill, NC, 27599, United States; Bowles Center for Alcohol Studies, University of North Carolina School of Medicine, Chapel Hill, NC, 27599, United States., Hwa LS; Bowles Center for Alcohol Studies, University of North Carolina School of Medicine, Chapel Hill, NC, 27599, United States; Department of Pharmacology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, United States., Makhijani VH; Bowles Center for Alcohol Studies, University of North Carolina School of Medicine, Chapel Hill, NC, 27599, United States; Neuroscience Curriculum, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, United States., Besheer J; Bowles Center for Alcohol Studies, University of North Carolina School of Medicine, Chapel Hill, NC, 27599, United States; Neuroscience Curriculum, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, United States; Department of Psychiatry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, United States., Kash TL; Pharmacology Curriculum, University of North Carolina, Chapel Hill, NC, 27599, United States; Bowles Center for Alcohol Studies, University of North Carolina School of Medicine, Chapel Hill, NC, 27599, United States; Department of Pharmacology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, United States; Neuroscience Curriculum, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, United States. Electronic address: tkash@email.unc.edu.
Jazyk: angličtina
Zdroj: Alcohol (Fayetteville, N.Y.) [Alcohol] 2019 Jun; Vol. 77, pp. 135-145. Date of Electronic Publication: 2018 Oct 06.
DOI: 10.1016/j.alcohol.2018.10.002
Abstrakt: Sex differences in chronic pain and alcohol abuse are not well understood. The development of rodent models is imperative for investigating the underlying changes behind these pathological states. In the present study, we investigated whether hind paw treatment with the inflammatory agent Complete Freund's Adjuvant (CFA) could generate hyperalgesia and alter alcohol consumption in male and female C57BL/6J mice. CFA treatment led to greater nociceptive sensitivity for both sexes in the Hargreaves test, and increased alcohol drinking for males in a continuous-access two-bottle choice (CA2BC) paradigm. Regardless of treatment, female mice exhibited greater alcohol drinking than males. Following a 2-h terminal drinking session, CFA treatment failed to produce changes in alcohol drinking, blood ethanol concentration (BEC), and plasma corticosterone (CORT) for both sexes. Two-hour alcohol consumption and CORT was higher in females than males, regardless of CFA treatment. Taken together, these findings have established that male mice are more susceptible to escalations in alcohol drinking when undergoing pain, despite higher levels of total alcohol drinking and CORT in females. Furthermore, the exposure of CFA-treated C57BL/6J mice to the CA2BC drinking paradigm has proven to be a useful model for studying the relationship between chronic pain and alcohol abuse. Future applications of the CFA/CA2BC model should incorporate manipulations of stress signaling and other related biological systems to improve our mechanistic understanding of pain and alcohol interactions.
(Copyright © 2018. Published by Elsevier Inc.)
Databáze: MEDLINE
Externí odkaz: