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首页> 外文期刊>Neuron >Role for GDNF in biochemical and behavioral adaptations to drugs of abuse.
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Role for GDNF in biochemical and behavioral adaptations to drugs of abuse.

机译:GDNF在对滥用药物进行生化和行为适应中的作用。

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摘要

The present study examined a role for GDNF in adaptations to drugs of abuse. Infusion of GDNF into the ventral tegmental area (VTA), a dopaminergic brain region important for addiction, blocks certain biochemical adaptations to chronic cocaine or morphine as well as the rewarding effects of cocaine. Conversely, responses to cocaine are enhanced in rats by intra-VTA infusion of an anti-GDNF antibody and in mice heterozygous for a null mutation in the GDNF gene. Chronic morphine or cocaine exposure decreases levels of phosphoRet, the protein kinase that mediates GDNF signaling, in the VTA. Together, these results suggest a feedback loop, whereby drugs of abuse decrease signaling through endogenous GDNF pathways in the VTA, which then increases the behavioral sensitivity to subsequent drug exposure.
机译:本研究检查了GDNF在适应滥用药物中的作用。将GDNF注入腹侧被盖区(VTA)是对成瘾重要的多巴胺能脑区域,阻止了某些对慢性可卡因或吗啡的生化适应以及可卡因的有益作用。相反,在大鼠中,通过VTA输注抗GDNF抗体增强了对可卡因的反应,而在GDNF基因无效突变的杂合子中,对可卡因的反应增强了。慢性吗啡或可卡因暴露会降低VTA中phosphoRet(介导GDNF信号传导的蛋白激酶)的水平。总之,这些结果表明存在一个反馈回路,借此滥用药物会减少VTA中内源性GDNF途径的信号传导,进而增加对后续药物暴露的行为敏感性。

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