Methamphetamine abuse impairs motor cortical plasticity and function.

Methamphetamine abuse impairs motor cortical plasticity and function.
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滥用甲基苯丙胺会损害运动皮层的可塑性和功能

DOI:
10.1038/mp.2017.143
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发表时间:
2017-09
影响因子:
11
通讯作者:
Yuan TF
Yuan TF
中科院分区:
医学1区
文献类型:
--
作者:
Huang X;Chen YY;Shen Y;Cao X;Li A;Liu Q;Li Z;Zhang LB;Dai W;Tan T;Arias-Carrion O;Xue YX;Su H;Yuan TF

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接触成瘾药物会触发与奖励相关的大脑区域的突触可塑性,例如中脑、伏核和前额皮质。慢性药物暴露对其他大脑区域的影响尚未得到充分研究。在这里,我们表征了大鼠自我施用甲基苯丙胺后运动皮层的突触可塑性。我们表明,这会导致大鼠脑切片皮质纹状体可塑性丧失,并损害转棒任务中的运动学习。这些发现与人类成瘾患者缺乏经颅磁刺激引起的运动诱发电位增强或抑制以及旋转追踪任务中表现不佳的观察结果相一致。综上所述,我们的结果表明,长期使用甲基苯丙胺可以通过药物诱发的突触可塑性阻断生理运动学习来影响行为表现。
Exposure to addictive drugs triggers synaptic plasticity in reward-related brain regions, such as the midbrain, nucleus accumbens and the prefrontal cortex. Effects of chronic drug exposure on other brain areas have not been fully investigated. Here, we characterize synaptic plasticity in motor cortex after methamphetamine self-administration in rats. We show that this causes a loss of corticostriatal plasticity in rat brain slices and impaired motor learning in the rotarod task. These findings are paralleled by the observation of a lack of transcranial magnetic stimulation-induced potentiation or depression of motor evoked potentials in human patients with addiction, along with poor performance in rotary pursuit task. Taken together, our results suggest that chronic methamphetamine use can affect behavioral performance via drug-evoked synaptic plasticity occluding physiological motor learning.
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