Operant sensation seeking requires metabotropic glutamate receptor 5 (mGluR5).

Operant sensation seeking requires metabotropic glutamate receptor 5 (mGluR5).
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DOI:
10.1371/journal.pone.0015085
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发表时间:
2010-11-30
期刊:
影响因子:
3.7
通讯作者:
Winder DG
Winder DG
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Olsen CM;Childs DS;Stanwood GD;Winder DG

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药理学和遗传学研究表明,代谢型谷氨酸受体5(mGluR5)在介导滥用药物的强化作用中起关键作用,而不是食物。本研究的目的是使用mGluR5敲除(KO)、杂合(Het)和野生型(WT)小鼠来确定mGluR5是否调节操作性感觉寻求(OSS),操作性感觉寻求是一种使用各种感觉刺激作为应答器的操作性任务。我们发现mGluR5 KO小鼠相对于WT小鼠具有显著降低的OSS响应,而Het小鼠显示OSS响应的矛盾增加。KO或Het小鼠均未表现出对食物作为替代物的改变的操作性反应。此外,我们通过一系列可卡因运动、位置偏好和焦虑相关测试评估了mGluR5 KO、Het和WT小鼠。虽然KO小鼠在一些运动和焦虑的措施显示出预期的差异,Het小鼠没有表现出表型或中间的。总之,这些数据证明了mGluR5在OSS中的关键作用,表明该受体在基于免疫的行为中的重要作用。
Pharmacological and genetic studies have suggested that the metabotropic glutamate receptor 5 (mGluR5) is critically involved in mediating the reinforcing effects of drugs of abuse, but not food. The purpose of this study was to use mGluR5 knockout (KO), heterozygous (Het), and wildtype (WT) mice to determine if mGluR5 modulates operant sensation seeking (OSS), an operant task that uses varied sensory stimuli as a reinforcer. We found that mGluR5 KO mice had significantly reduced OSS responding relative to WT mice, while Het mice displayed a paradoxical increase in OSS responding. Neither KO nor Het mice exhibited altered operant responding for food as a reinforcer. Further, we assessed mGluR5 KO, Het and WT mice across a battery of cocaine locomotor, place preference and anxiety related tests. Although KO mice showed expected differences in some locomotor and anxiety measures, Het mice either exhibited no phenotype or an intermediate one. In total, these data demonstrate a key role for mGluR5 in OSS, indicating an important role for this receptor in reinforcement-based behavior.
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