Tumor necrosis factor-alpha modulates glutamate transport in the CNS and is a critical determinant of outcome from viral encephalomyelitis.

Tumor necrosis factor-alpha modulates glutamate transport in the CNS and is a critical determinant of outcome from viral encephalomyelitis.
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DOI:
10.1016/j.brainres.2009.01.040
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发表时间:
2009-03-31
期刊:
影响因子:
2.9
通讯作者:
Kerr DA
Kerr DA
中科院分区:
医学3区
文献类型:
--
作者:
Carmen J;Rothstein JD;Kerr DA

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神经适应性辛德比斯病毒(NSV)是一种嗜神经性病毒,由于大脑和脊髓运动神经元的死亡而引起易感小鼠的暴发性脑脊髓炎。我们和其他人发现,未感染的运动神经元在NSV感染后死亡,至少部分原因是星形胶质细胞谷氨酸运输中断,导致兴奋性运动神经元死亡。在这里,我们研究了星形胶质细胞失调与NSV感染相关的机制。用NSV处理器官型切片培养物会导致病毒复制、细胞死亡、星形胶质细胞形态改变,以及星形胶质细胞谷氨酸转运体GLT-1的下调。我们发现,肿瘤坏死因子-α可以介导GLT-1的下调。此外,感染NSV的肿瘤坏死因子-α缺陷小鼠既没有表现出GLT-1下调,也没有表现出脑干和颈髓运动神经元的神经元死亡,并显著降低了死亡率。这些发现对预防与炎症反应相关的中枢神经系统损伤的疾病干预和治疗发展具有重要意义。
Neuroadapted Sindbis virus (NSV) is a neuronotropic virus that causes a fulminant encephalomyelitis in susceptible mice due to death of motor neurons in the brain and spinal cord. We and others have found that uninfected motor neurons die in response to NSV infection, at least in part due to disrupted astrocytic glutamate transport, resulting in excitotoxic motor neuron death. Here, we examined the mechanisms of astrocyte dysregulation associated with NSV infection. Treatment of organotypic slice cultures with NSV results in viral replication, cell death, altered astrocyte morphology, and the downregulation of the astrocytic glutamate transporter, GLT-1. We have found that TNF-α can mediate GLT-1 downregulation. Furthermore, TNF-α deficient mice infected with NSV exhibit neither GLT-1 downregulation nor neuronal death of brainstem and cervical spinal cord motor neurons and have markedly reduced mortality. These findings have implications for disease intervention and therapeutic development for the prevention of CNS damage associated with inflammatory responses.
DOI: 10.1523/jneurosci.2002-04.2004
发表时间: 2004-08-25
影响因子: 5.3
作者:
Darman, J;Backovic, S;Kerr, DA
通讯作者: Kerr, DA
DOI: 10.1002/ana.20033
发表时间: 2004-04-01
影响因子: 11.2
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Nargi-Aizenman, JL;Havert, MB;Griffin, DE
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发表时间: 2008-03-04
影响因子: 11.1
作者:
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发表时间: 2004-06-01
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作者:
Bezzi, P;Gundersen, V;Volterra, A
通讯作者: Volterra, A
DOI: 10.1128/jvi.75.15.7114-7121.2001
发表时间: 2001-08-01
影响因子: 5.4
作者:
Nargi-Aizenman, JL;Griffin, DE
通讯作者: Griffin, DE