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首页> 外文期刊>The Journal of Neuroscience: The Official Journal of the Society for Neuroscience >Inactivation of Rho signaling pathway promotes CNS axon regeneration.
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Inactivation of Rho signaling pathway promotes CNS axon regeneration.

机译:Rho信号通路的失活促进中枢神经系统轴突再生。

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摘要

Regeneration in the CNS is blocked by many different growth inhibitory proteins. To foster regeneration, we have investigated a strategy to block the neuronal response to growth inhibitory signals. Here, we report that injured axons regrow directly on complex inhibitory substrates when Rho GTPase is inactivated. Treatment of PC12 cells with C3 enzyme to inactivate Rho and transfection with dominant negative Rho allowed neurite growth on inhibitory substrates. Primary retinal neurons treated with C3 extended neurites on myelin-associated glycoprotein and myelin substrates. To explore regeneration in vivo, we crushed optic nerves of adult rat. After C3 treatment, numerous cut axons traversed the lesion to regrow in the distal white matter of the optic nerve. These results indicate that targeting signaling mechanisms converging to Rho stimulates axon regeneration on inhibitory CNS substrates.
机译:中枢神经系统的再生被许多不同的生长抑制蛋白所阻断。为了促进再生,我们研究了一种策略来阻止神经元对生长抑制信号的反应。在这里,我们报告说,当Rho GTPase失活时,受伤的轴突直接在复杂的抑制底物上生长。用C3酶处理PC12细胞以灭活Rho,并用显性阴性Rho转染使神经突在抑制性底物上生长。 C3处理的原代视网膜神经元在髓磷脂相关糖蛋白和髓磷脂底物上延伸神经突。为了探索体内再生,我们粉碎了成年大鼠的视神经。经过C3治疗后,许多切开的轴突横穿病灶以在视神经末梢白质中重新生长。这些结果表明,收敛于Rho的靶向信号传导机制刺激了抑制性CNS底物上的轴突再生。

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