Time-dependent effects of corticosterone on reward-based decision-making in a rodent model of the Iowa Gambling Task

被引:34
作者
Koot, Susanne [1 ,2 ]
Baars, Annemarie [2 ]
Hesseling, Peter [2 ]
van den Bos, Ruud [1 ,3 ]
Joels, Marian [1 ]
机构
[1] Univ Med Ctr Utrecht, Rudolf Magnus Inst, Dept Neurosci & Pharmacol, NL-3584 CG Utrecht, Netherlands
[2] Univ Utrecht, Rudolf Magnus Inst, Fac Vet Med, Div Behav Neurosci,Dept Anim Sci & Soc, NL-3508 TC Utrecht, Netherlands
[3] Radboud Univ Nijmegen, Dept Organismal Anim Physiol, Nijmegen, Netherlands
关键词
Stress; Corticosterone; Rat; Iowa Gambling Task; Decision-making; MEDIAL PREFRONTAL CORTEX; ORBITOFRONTAL CORTEX; SEX-DIFFERENCES; ACUTE STRESS; BASAL GANGLIA; BASOLATERAL AMYGDALA; ANTICIPATORY STRESS; PRELIMBIC CORTEX; FRONTAL-CORTEX; RISK;
D O I
10.1016/j.neuropharm.2013.02.008
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Corticosteroid hormones, released after stress, are known to change neuronal activity in two time-domains: within minutes via non-genomic pathways and with a delay of >1 h through pathways involving transcriptional regulation. Recent evidence in rodents and humans indicates that these two modes of corticosteroid action differently affect cognitive tasks. Here, we investigated whether reward-based decision-making, in a rat model of the Iowa Gambling Task (rIGT), is also differently altered by rapid versus delayed actions of corticosterone. We targeted the rapid and delayed time domain by injecting corticosterone (CURT, 1 mg/kg, s.c.) at 30 min (rapid) or 180 min (delayed) respectively prior to behavioural testing, during the final 3 days of the behavioural paradigm. In saline treated rats, the number of visits to the disadvantageous arm decreased over trial blocks, whilst this was attenuated when CURT was administered 30 min before testing. This attenuation was associated with a significantly increased c-Fos expression in the lateral orbitofrontal cortex and insular cortex, and a trend for an increase in the infralimbic cortex. The rapid corticosteroid effect contrasted with treatment 180 min before testing, where the number of visits to the disadvantageous arm as well as c-Fos labelling was not affected. These findings indicate that rapid corticosteroid actions impair reward-based decision-making. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:306 / 315
页数:10
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