Cue-induced reinstatement of alcohol-seeking behavior is associated with increased CaMKII T286 phosphorylation in the reward pathway of mice

Pharmacology, Biochemistry, and Behavior
Michael C SallingClyde W Hodge

Abstract

Cue-induced reinstatement of alcohol-seeking is a hallmark behavioral pathology of addiction. Evidence suggests that reinstatement (e.g., relapse), may be regulated by cell signaling systems that underlie neuroplasticity. A variety of plasticity events require activation of calcium calmodulin-dependent protein kinase II (CaMKII) in components of the reward pathway, such as the nucleus accumbens and amygdala. We sought to determine if cue-induced reinstatement of alcohol-seeking behavior is associated with changes in the activation state (e.g., phosphorylation) of CaMKII-T286. Male C57BL/6J mice (n=14) were trained to lever press on a fixed-ratio-4 schedule of sweetened alcohol (2% sucrose+9% EtOH) reinforcement. After 14-d of extinction (no cues or reinforcers), mice underwent a response-contingent reinstatement (n=7) vs. an additional day of extinction (n=7). Brains were removed immediately after the test and processed for evaluation of pCaMKII-T286 immunoreactivity (IR). Number of pCaMKII-T286 positive cells/mm2 was quantified from coronal brain sections using Bioquant Image Analysis software. Mice emitted significantly more responses on the alcohol vs. the inactive lever throughout the baseline phase with average alcohol int...Continue Reading

Citations

May 17, 2018·PloS One·Brent Kevin YoungNing Tian
Nov 5, 2020·International Journal of Molecular Sciences·Chaya ShorJiang-Hong Ye
Mar 12, 2021·Journal of Neurochemistry·Esi DomiEric Augier
Jul 2, 2021·Redox Biology·Bao Ngoc TranIrmgard Tegeder
Aug 8, 2021·Journal of Clinical Medicine·Yinghao YuAndrew Chihwei Huang

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