mGluR5 knockout mice display increased dendritic spine densities.

mGluR5 knockout mice display increased dendritic spine densities.
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DOI:
10.1016/j.neulet.2012.07.014
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发表时间:
2012-08-22
影响因子:
2.5
通讯作者:
Brumberg JC
Brumberg JC
中科院分区:
医学4区
文献类型:
--
作者:
Chen CC;Lu HC;Brumberg JC

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树突棘密度和形态的改变与突触功能异常有关。特别是代谢性谷氨酸受体5 (mGluR5)与树木发生和脊柱发生有关,因为它的激活触发了各种信号级联反应,这些信号级联反应已被证明在突触成熟和可塑性中发挥作用。在这里,我们使用高尔基浸染技术来分析mGluR5−/−基因敲除小鼠的树突棘,并与它们的杂合子mGluR5+/−幼崽进行比较。与mGluR5+/−小鼠相比,mGluR5−/−小鼠的脊柱密度升高,与脊柱类型或沿树突树的位置无关。这种解剖变化可能是在mGluR5全敲除小鼠中观察到的高兴奋性的基础。
Alterations in dendritic spine densities and morphologies have been correlated with the abnormal functioning of the synapse. Specifically the metabotropic glutamate receptor 5 (mGluR5) has been implicated in dendrogenesis and spineogenesis, since its activation triggers various signaling cascades that have been demonstrated to play roles in synaptic maturation and plasticity. Here we used the Golgi impregnation technique to analyze the dendritic spines of mGluR5−/− knockout mice in comparison to their heterozygote mGluR5+/− littermates. mGluR5−/−mice had elevated spine densities irrespective of spine type or location along their dendritic trees in comparison to mGluR5+/− animals. Such anatomical changes may underlie the hyperexcitability observed in mGluR5 total knockout mice.
DOI: 10.1523/jneurosci.0258-09.2009
发表时间: 2009-05-20
期刊: The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子: --
作者:
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