Nat Commun:脊髓损伤治疗关键----免疫细胞

2018-11-09 小通 生物通

科学家在斑马鱼模型中证明,免疫系统——具体来说是巨噬细胞——在帮助鱼类修复受损神经连接方面起关键作用,这项研究为开发脊髓损伤治疗方法铺设了新道路。

科学家在斑马鱼模型中证明,免疫系统——具体来说是巨噬细胞——在帮助鱼类修复受损神经连接方面起关键作用,这项研究为开发脊髓损伤治疗方法铺设了新道路。

巨噬细胞常常帮助机体抵御感染,它们在伤口愈合中也起关键作用。爱丁堡大学的研究人员发现,巨噬细胞可以产生抑制脊髓损伤部位炎症的关键分子,使得神经细胞有机会弥补间隙并修复丢失的连接。

爱丁堡大学发现脑科学中心的研究小组建立了一个系统以研究脊髓损伤部位的免疫细胞之间的复杂相互作用和它们分别对神经连接受损斑马鱼的修复重建作出了什么贡献。

研究发现,抑制炎症可有效促进脊髓损伤斑马鱼幼体的轴突再生,突变型分析表明,外周巨噬细胞,而非中性粒细胞或小胶质细胞是修复所必需的。缺乏irf8的突变型巨噬细胞导致长期炎症,Tnf-α和Il-1β水平升高。抑制Tnf-α无法恢复irf8突变型的轴突生长,但是对野生型却有影响,暗示Tnf-α具有促进再生的作用。

相反,降低Il-1β水平或Il-1β+中性粒细胞数量可以拯救irf8突变体的功能再生。然而,在早期再生过程中,沉默Il-1β功能会损害突变型和野生型的再生能力。

这篇《Nature Communications》的文章作者、Catherina Becker教授说:“斑马鱼对了解人类非常有用,脊髓损伤后的斑马鱼得以完全恢复游泳能力。我们的研究重点在于了解修复过程中,所涉及的因素,以便寻找开发人类治疗潜在途径。”

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    2019-06-13 liuli5079
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    2019-09-25 liye789132251
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    2018-11-10 kafei

    了解一下谢谢

    0

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    2018-11-09 医者仁心5538

    学习了

    0

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