Dab2IP GTPase activating protein regulates dendrite development and synapse number in cerebellum.

Dab2IP GTPase activating protein regulates dendrite development and synapse number in cerebellum.
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DOI:
10.1371/journal.pone.0053635
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Homayouni R
Homayouni R
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Qiao S;Kim SH;Heck D;Goldowitz D;LeDoux MS;Homayouni R

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DOC-2/DAB-2相互作用蛋白(Dab 2 IP)是一种GT3激活蛋白,与Disabled-1结合,Disabled-1是一种参与Reelin信号传导和脑发育的细胞溶质衔接蛋白。Dab 2 IP调节PI 3 K-AKT信号传导,并与转移性前列腺癌、腹主动脉瘤和冠心病相关。迄今为止,Dab 2 IP在神经系统中的生理功能,它是高度表达的,是相对未知的。在这项研究中,我们产生了一个小鼠模型与Dab 2 IP使用逆转录病毒基因陷阱策略的靶向中断。与reeler小鼠不同,Dab 2 IP敲除小鼠没有表现出严重的共济失调或小脑发育不全。然而,Dab 2 IP缺乏产生了一些小脑异常,如延迟浦肯野细胞(PC)树突的发展,减少平行纤维突触标记VGluT 1,并增加攀爬纤维突触标记VGluT 2。这些发现首次证明Dab 2 IP在树突发育中起重要作用,并调节小脑中突触的数量。
DOC-2/DAB-2 interacting protein (Dab2IP) is a GTPase activating protein that binds to Disabled-1, a cytosolic adapter protein involved in Reelin signaling and brain development. Dab2IP regulates PI3K-AKT signaling and is associated with metastatic prostate cancer, abdominal aortic aneurysms and coronary heart disease. To date, the physiological function of Dab2IP in the nervous system, where it is highly expressed, is relatively unknown. In this study, we generated a mouse model with a targeted disruption of Dab2IP using a retrovirus gene trap strategy. Unlike reeler mice, Dab2IP knock-down mice did not exhibit severe ataxia or cerebellar hypoplasia. However, Dab2IP deficiency produced a number of cerebellar abnormalities such as a delay in the development of Purkinje cell (PC) dendrites, a decrease in the parallel fiber synaptic marker VGluT1, and an increase in the climbing fiber synaptic marker VGluT2. These findings demonstrate for the first time that Dab2IP plays an important role in dendrite development and regulates the number of synapses in the cerebellum.
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发表时间: 2003-10-07
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影响因子: --
作者:
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