Proneurotrophins, seizures, and neuronal apoptosis.

Proneurotrophins, seizures, and neuronal apoptosis.
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DOI:
10.1177/1073858409349903
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发表时间:
2010-06
期刊:
The Neuroscientist : a review journal bringing neurobiology, neurology and psychiatry
影响因子:
--
通讯作者:
Friedman WJ
Friedman WJ
中科院分区:
其他
文献类型:
--
作者:
Friedman WJ

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在发育和成熟的大脑中,神经元对环境中影响其生存和功能的许多因素作出反应。在这些因素中,神经营养因子已被证明支持神经元的存活和功能,主要通过Trk家族的受体酪氨酸激酶起作用。然而,最近的研究已经证实,未裂解的神经营养因子前体,即前eurotrophins,可以通过p75神经营养因子受体分泌并诱导细胞凋亡,这表明分泌的成熟和前eurotrophins的平衡对神经元的存活或死亡有重要影响。癫痫发作引起嗜前eurotrophin分泌和p75NTR表达的增加,将这些因素的平衡转向信号细胞死亡。本文将讨论这种配体-受体系统在癫痫发作后神经元丢失中起重要作用的证据。
Neurons respond to numerous factors in their environment that influence their survival and function during development and in the mature brain. Among these factors, the neurotrophins have been shown to support neuronal survival and function, acting primarily through the Trk family of receptor tyrosine kinases. However, recent studies have established that the uncleaved neurotrophin precursors, the proneurotrophins, can be secreted and induce apoptosis via the p75 neurotrophin receptor, suggesting that the balance of secreted mature and proneurotrophins has a critical impact on neuronal survival or death. Epileptic seizures elicit increases in both proneurotrophin secretion and p75NTR expression, shifting the balance of these factors toward signaling cell death. This review will discuss the evidence that this ligand-receptor system plays an important role in neuronal loss following seizures.
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