Inactivation of the paraventricular thalamus abolishes the expression of cocaine conditioned place preference in rats.

Inactivation of the paraventricular thalamus abolishes the expression of cocaine conditioned place preference in rats.
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DOI:
10.1016/j.drugalcdep.2013.09.021
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发表时间:
2014-01-01
影响因子:
4.2
通讯作者:
Sorg, Barbara A.
Sorg, Barbara A.
中科院分区:
医学2区
文献类型:
--
作者:
Browning, Jenny R.;Jansen, Heiko T.;Sorg, Barbara A.

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室旁丘脑(PVT)正迅速被认为是成瘾回路的一部分。除了与大多数导致成瘾的大脑区域(如伏隔核、前额叶皮层、杏仁核和海马体)有密切的解剖学联系外,PVT 最近还被证明有助于可卡因致敏和恢复。在本研究中,我们研究了 PVT 在可卡因条件性位置偏好 (CPP) 表达中的作用。我们测试了巴氯芬/蝇蕈醇 (bac-mus) 微注射灭活 PVT 对可卡因诱导的大鼠 CPP 表达的影响。将引导插管植入大鼠的 PVT 中。在 CPP 测试之前,将 Bac-mus(GABAB-GABAA 激动剂)或盐水注射到 PVT 中。 bac-mus 使 PVT 失活阻止了 CPP 的表达,而放置在 PVT 之外并不影响 CPP。 PVT 内注射 bac-mus 不会影响治疗期间的运动活动。在本研究中,我们通过证明 PVT 对于可卡因 CPP 的表达是必需的,为越来越多支持 PVT 在成瘾中的作用的研究做出了贡献。
The paraventricular thalamus (PVT) is rapidly becoming recognized as part of the addiction circuitry. In addition to its strong anatomical connection to most of the brain regions underlying addiction, such as the nucleus accumbens, prefrontal cortex, amygdala, and hippocampus, the PVT has recently been shown to contribute to cocaine sensitization and reinstatement. In the present study we examined the role of the PVT in the expression of cocaine conditioned place preference (CPP). We tested the impact of PVT inactivation by baclofen/muscimol (bac-mus) microinjection on the expression of cocaine-induced CPP in rats. Rats were implanted with guide cannulae into the PVT. Bac-mus (GABAB-GABAA agonists) or saline was injected into the PVT prior to CPP testing. Inactivation of the PVT by bac-mus prevented the expression of CPP, while placements outside the PVT did not affect CPP. Intra-PVT injections of bac-mus did not affect locomotor activity during the session. In the present study we contribute to the growing body of research supporting a role for the PVT in addiction by demonstrating that the PVT is necessary for the expression of cocaine CPP.
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