Axon guidance and injury-lessons from Wnts and Wnt signaling.

Axon guidance and injury-lessons from Wnts and Wnt signaling.
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DOI:
10.1016/j.conb.2014.05.005
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发表时间:
2014-08
影响因子:
5.7
通讯作者:
Zou Y
Zou Y
中科院分区:
医学2区
文献类型:
--
作者:
Onishi K;Hollis E;Zou Y

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过去十年的许多研究揭示了Wnt信号在发育过程中轴突引导中的作用和机制,以及创伤性损伤后成人轴突中Wnt信号的重新诱导,这对轴突可塑性产生了深远的影响。 Wnt 家族信号分子拥有 19 个 Wnt 和 14 个已知受体(10 个 Frizzleds (Fzds)、Ryk、Ror1/2 和 PTK7),对复杂的大脑和脊髓电路的接线特异性做出了重大贡献。随后对信号机制的研究表明,保守的细胞极性途径介导生长锥转向。这些细胞极性途径可能揭示生长锥引导的一般原理。脊髓损伤后重新出现的 Wnt 信号系统限制了下行和上行运动和感觉轴突的再生。因此,从轴突发育中学到的Wnt信号传导机制的知识可以应用于成年期的轴突修复。
Many studies in the past decade have revealed the role and mechanisms of Wnt signaling in axon guidance during development and the reinduction of Wnt signaling in adult axons upon traumatic injury, which has profound influences on axon plasticity. With 19 Wnts and 14 known receptors (10 Frizzleds (Fzds), Ryk, Ror1/2 and PTK7), the Wnt family signaling molecules contribute significantly to the wiring specificity of the complex brain and spinal cord circuitry. Subsequent investigation into the signaling mechanisms showed that conserved cell polarity pathways mediate growth cone steering. These cell polarity pathways may unveil general principles of growth cone guidance. The reappeared Wnt signaling system after spinal cord injury limits the regrowth of both descending and ascending motor and sensory axons. Therefore, the knowledge of Wnt signaling mechanisms learned from axon development can be applied to axon repair in adulthood.
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