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Nerve growth factor-induced neurite outgrowth in PC12 cells involves the coordinate induction of microtubule assembly and assembly-promoting factors

机译:神经生长因子诱导的PC12细胞神经突生长涉及微管组装和组装促进因子的协同诱导

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摘要

Nerve growth factor (NGF) regulates the microtubule-dependent extension and maintenance of axons by some peripheral neurons. We show here that one effect of NGF is to promote microtubule assembly during neurite outgrowth in PC12 cells. Though NGF causes an increase in total tubulin levels, the formation of neurites and the assembly of microtubules follow a time course completely distinct from that of the tubulin induction. The increases in microtubule mass and neurite extension closely parallel 10- and 20-fold inductions of tau and MAP1, proteins shown previously to promote microtubule assembly in vitro. When NGF is removed from PC12 cells, neurites disappear, microtubule mass decreases, and both microtubule-associated proteins return to undifferentiated levels. These data suggest that the induction of tau and MAP1 in response to NGF promotes microtubule assembly and that these factors are therefore key regulators of neurite outgrowth.
机译:神经生长因子(NGF)调节一些外周神经元依赖微管的轴突的延伸和维持。我们在这里显示NGF的作用之一是在PC12细胞的神经突生长过程中促进微管组装。尽管NGF导致总的微管蛋白水平增加,但神经突的形成和微管的组装遵循与微管蛋白诱导完全不同的时间过程。微管质量和神经突延伸的增加紧密平行于tau和MAP1的10倍和20倍诱导,蛋白质先前显示在体外促进微管组装。当从PC12细胞中去除NGF时,神经突消失,微管质量降低,并且两种与微管相关的蛋白质均返回未分化的水平。这些数据表明响应NGF诱导tau和MAP1促进了微管的组装,因此这些因素是神经突生长的关键调节因子。

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  • 年度 1985
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