Cerebellar plasticity and motor learning deficits in a copy-number variation mouse model of autism.

Cerebellar plasticity and motor learning deficits in a copy-number variation mouse model of autism.
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DOI:
10.1038/ncomms6586
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发表时间:
2014-11-24
影响因子:
16.6
通讯作者:
Hansel, Christian
Hansel, Christian
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Piochon, Claire;Kloth, Alexander D.;Grasselli, Giorgio;Titley, Heather K.;Nakayama, Hisako;Hashimoto, Kouichi;Wan, Vivian;Simmons, Dana H.;Eissa, Tahra;Nakatani, Jin;Cherskov, Adriana;Miyazaki, Taisuke;Watanabe, Masahiko;Takumi, Toru;Kano, Masanobu;Wang, Samuel S. -H.;Hansel, Christian

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自闭症谱系障碍(ASD)的一个共同特征是运动控制和学习障碍,发生在大多数自闭症儿童中,与小脑功能的扰动一致。在这里,我们报告了人类15 q11 -13重复的小鼠模型(patDp/+)中运动行为和小脑突触可塑性的改变,这是自闭症中最常见的遗传畸变之一。这些小鼠表现出类似ASD的社会行为缺陷。我们发现,在patDp/+小鼠延迟眨眼条件小脑依赖性运动学习的一种形式是受损的,并观察到一个假定的细胞机制运动学习,长期抑郁症(LTD)在平行的纤维浦肯野细胞突触失调。此外,发育消除多余的攀爬纤维活动依赖性突触修剪模型受损。这些发现指出,突触可塑性和修剪的缺陷是自闭症运动问题和异常回路发育的潜在原因。
A common feature of autism spectrum disorder (ASD) is the impairment of motor control and learning, occurring in a majority of children with autism, consistent with perturbation in cerebellar function. Here we report alterations in motor behavior and cerebellar synaptic plasticity in a mouse model (patDp/+) for the human 15q11-13 duplication, one of the most frequently observed genetic aberrations in autism. These mice show ASD-resembling social behavior deficits. We find that in patDp/+ mice delay eyeblink conditioning—a form of cerebellum-dependent motor learning—is impaired, and observe deregulation of a putative cellular mechanism for motor learning, long-term depression (LTD) at parallel fiber-Purkinje cell synapses. Moreover, developmental elimination of surplus climbing fibers—a model for activity-dependent synaptic pruning—is impaired. These findings point to deficits in synaptic plasticity and pruning as potential causes for motor problems and abnormal circuit development in autism.
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影响因子: 16.2
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