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Self-administration acquisition latency predicts locomotor sensitivity to cocaine in male rats.

作者信息

Rakela Samantha, Sortman Bo W, Gobin Christina, Hao Sophie, Caceres-Brun Delfina, Warren Brandon L

机构信息

Department of Pharmacodynamics, University of Florida, 1345 Center Dr., Gainesville, FL 32610, United States.

Department of Pharmacodynamics, University of Florida, 1345 Center Dr., Gainesville, FL 32610, United States.

出版信息

Behav Brain Res. 2024 Sep 13;473:115170. doi: 10.1016/j.bbr.2024.115170. Epub 2024 Jul 29.


DOI:10.1016/j.bbr.2024.115170
PMID:39084564
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11956165/
Abstract

Individual differences in drug use emerge soon after initial exposure, and only a fraction of individuals who initiate drug use go on to develop a substance use disorder. Variability in vulnerability to establishing drug self-administration behavior is also evident in preclinical rodent models. Latent characteristics that underlie this variability and the relationship between early drug use patterns and later use remain unclear. Here, we attempt to determine whether propensity to establish cocaine self-administration is related to subsequent cocaine self-administration behavior in male Sprague-Dawley rats (n = 14). Prior to initiating training, we evaluated basal locomotor and anxiety-like behavior in a novel open field test. We then trained rats to self-administer cocaine in daily 3 h cocaine (0.75 mg/kg/infusion) self-administration sessions until acquisition criteria (≥30 active lever presses with ≥70 % responding on the active lever in one session) was met and divided rats into Early and Late groups by median-split analysis based on their latency to meet acquisition criteria. After each rat met acquisition criteria, we gave them 10 additional daily cocaine self-administration sessions. We then conducted a progressive ratio, cocaine-induced locomotor sensitivity test, and non-reinforced cocaine seeking test after two weeks of forced abstinence. Early Learners exhibited significantly less locomotion after an acute injection of cocaine, but the groups did not differ in any other behavioral parameter examined. These results indicate that cocaine self-administration acquisition latency is not predictive of subsequent drug-taking behavior, but may be linked to physiological factors like drug sensitivity that can predispose rats to learn the operant task.

摘要

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Self-administration acquisition latency predicts locomotor sensitivity to cocaine in male rats.

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本文引用的文献

[1]
Prelimbic and infralimbic medial prefrontal cortex neuron activity signals cocaine seeking variables across multiple timescales.

Psychopharmacology (Berl). 2023-3

[2]
Prelimbic Ensembles Mediate Cocaine Seeking After Behavioral Acquisition and Once Rats Are Well-Trained.

Front Behav Neurosci. 2022-9-26

[3]
Fos-expressing neuronal ensembles in rat infralimbic cortex encode initial and maintained oxycodone seeking in rats.

Addict Biol. 2022-3

[4]
The rise of illicit fentanyls, stimulants and the fourth wave of the opioid overdose crisis.

Curr Opin Psychiatry. 2021-7-1

[5]
Food-Seeking Behavior Is Mediated by Fos-Expressing Neuronal Ensembles Formed at First Learning in Rats.

eNeuro. 2021-4-23

[6]
Sex differences in the effect of the FKBP5 inhibitor SAFit2 on anxiety and stress-induced reinstatement following cocaine self-administration.

Neurobiol Stress. 2020-6-1

[7]
Fos-expressing neuronal ensemble in rat ventromedial prefrontal cortex encodes cocaine seeking but not food seeking in rats.

Addict Biol. 2021-5

[8]
Considering Drug-Associated Contexts in Substance Use Disorders and Treatment Development.

Neurotherapeutics. 2020-1

[9]
The treatment of cocaine use disorder.

Sci Adv. 2019-10-16

[10]
Separate vmPFC Ensembles Control Cocaine Self-Administration Versus Extinction in Rats.

J Neurosci. 2019-7-22

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