Presynaptic regulation of astroglial excitatory neurotransmitter transporter GLT1.

Presynaptic regulation of astroglial excitatory neurotransmitter transporter GLT1.
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星形胶质细胞兴奋性神经递质转运蛋白 GLT1 的突触前调节。

DOI:
10.1016/j.neuron.2009.02.010
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发表时间:
2009-03-26
期刊:
影响因子:
16.2
通讯作者:
Rothstein, Jeffrey D.
Rothstein, Jeffrey D.
中科院分区:
医学1区
文献类型:
--
作者:
Yang, Yongjie;Gozen, Oguz;Watkins, Andrew;Lorenzini, Ileana;Lepore, Angelo;Gao, Yuanzheng;Vidensky, Svetlana;Brennan, Jean;Poulsen, David;Park, Jeong Won;Jeon, Noo Li;Robinson, Michael B.;Rothstein, Jeffrey D.

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神经元-星形胶质细胞突触复合体是神经系统的基本运作单位。星形胶质细胞通过 GLT1/EAAT2 进行神经递质运输,在突触谷氨酸的调节中发挥核心作用。这种重要的神经元-胶质细胞通讯背后的星形胶质细胞机制尚不清楚。在这里,我们证明突触前末梢对于 GLT1/EAAT2 转录激活是充分且必要的,并确定了调节星形胶质细胞对突触前输入反应的分子途径。突触前末梢通过 kappa B 基序结合磷蛋白 (KBBP) 调节星形胶质细胞 GLT1/EAAT2,KBBP 是人异质核核糖核蛋白 K (hnRNP K) 的小鼠同源物,与 GLT1/EAAT2 启动子的必需元件结合。这种神经元刺激因子是 GLT1/EATT2 转录激活所必需的,并且负责神经损伤中星形胶质细胞的改变。急性皮质脊髓束横断、蓖麻毒素诱导的运动神经元死亡或肌萎缩侧索硬化症 (ALS) 中的慢性神经变性导致的体内神经元-星形胶质细胞信号传导去神经支配都会导致星形胶质细胞 KBBP 表达减少和星形胶质细胞转运蛋白表达转录功能障碍。我们的研究表明,突触前元件动态地协调正常的星形胶质细胞功能,并且还提供了一种基本的信号传导机制,通过该机制,神经元功能的改变和损伤导致中枢神经系统疾病中的星形胶质细胞失调。
The neuron-astrocyte synaptic complex is a fundamental operational unit of the nervous system. Astroglia play a central role in the regulation of synaptic glutamate, via neurotransmitter transport by GLT1/EAAT2. The astroglial mechanisms underlying this essential neuron-glial communication are not known. Here we show that presynaptic terminals are sufficient and necessary for GLT1/EAAT2 transcriptional activation and have identified the molecular pathway that regulates astroglial responses to presynaptic input. Presynaptic terminals regulate astroglial GLT1/EAAT2 via kappa B-motif binding phosphoprotein (KBBP), the mouse homologue of human heterogeneous nuclear ribonucleoprotein K (hnRNP K), which binds to an essential element of GLT1/EAAT2 promoter. This neuron-stimulated factor is required for GLT1/EATT2 transcriptional activation and is responsible for astroglial alterations in neural injury. Denervation of neuron-astrocyte signaling in vivo, by acute corticospinal tract transection, ricin-induced motor neuron death, or chronic neurodegeneration in amyotrophic lateral sclerosis (ALS) all result in reduced astroglial KBBP expression and transcriptional dysfunction of astroglial transporter expression. Our studies indicate that presynaptic elements dynamically coordinate normal astroglial function and also provide a fundamental signaling mechanism by which altered neuronal function and injury leads to dysregulated astroglia in CNS disease.
DOI: 10.1038/nn825
发表时间: 2002-04-01
影响因子: 25
作者:
Arnth-Jensen, N;Jabaudon, D;Scanziani, M
通讯作者: Scanziani, M
DOI: 10.1007/bf00325030
发表时间: 1968-01-01
期刊: ZEITSCHRIFT FUR ZELLFORSCHUNG UND MIKROSKOPISCHE ANATOMIE
影响因子: --
作者:
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通讯作者: KREUTZBE.G
DOI: 10.1523/jneurosci.0790-07.2007
发表时间: 2007-06-20
影响因子: 5.3
作者:
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通讯作者: Rothstein, Jeffrey D.
DOI: 10.1002/cne.20737
发表时间: 2005-11-07
影响因子: 2.5
作者:
Berger, UV;DeSilva, TM;Rosenberg, PA
通讯作者: Rosenberg, PA
DOI: 10.1073/pnas.032539299
发表时间: 2002-02-05
影响因子: 11.1
作者:
Howland, DS;Liu, J;Rothstein, JD
通讯作者: Rothstein, JD