Nerve growth factor attenuates proliferation of astrocytes via the p75 neurotrophin receptor.

Nerve growth factor attenuates proliferation of astrocytes via the p75 neurotrophin receptor.
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DOI:
10.1002/glia.20857
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发表时间:
2009-10
期刊:
影响因子:
6.2
通讯作者:
Friedman, Wilma J.
Friedman, Wilma J.
中科院分区:
医学1区
文献类型:
--
作者:
Cragnolini, Andrea B.;Huang, Yangyang;Gokina, Pradeepa;Friedman, Wilma J.
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p75神经营养因子受体参与调节多种细胞功能,这些功能取决于细胞环境。我们已经观察到癫痫发作后,星形胶质细胞和海马CA3区神经元上的p75 NTR被强烈诱导,然而,该受体在这些胶质细胞上的功能尚未确定。我们采用原代培养系统研究神经营养因子对星形胶质细胞的影响。与海马神经元相比,用NGF处理海马星形胶质细胞引起细胞数量减少,但没有引起凋亡反应。相反,p75NTR的激活,NGF衰减有丝分裂原,如EGF或血清诱导的增殖。这些研究证明了脑中神经营养因子功能的细胞类型特异性。
The p75 neurotrophin receptor has been implicated in the regulation of multiple cellular functions that differ depending on the cell context. We have observed that p75NTR is strongly induced on astrocytes as well as neurons in the hippocampal CA3 region after seizures, however the function of this receptor on these glial cells has not been defined. We have employed a primary culture system to investigate the effects of neurotrophins on astrocytes. Treatment of hippocampal astrocytes with NGF caused a reduction in cell number, but did not elicit an apoptotic response, in contrast to hippocampal neurons. Instead, activation of p75NTR by NGF attenuated proliferation induced by mitogens such as EGF or serum. These studies demonstrate the cell type specificity of neurotrophin functions in the brain.
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