修飾外周巨噬細胞或可延長ALS存活
作者:
小柯機器人發布時間:2020/10/22 13:38:01
法國腦研究所-巴黎腦研究所-ICM Séverine Boillée 研究組取得最新進展。他們的研究發現修飾外周巨噬細胞具有改變小膠質細胞反應性和延長肌萎縮性側索硬化症(ALS)存活的能力。2020年10月19日,《自然-神經科學》雜誌發表了這一成果。
他們顯示,在小鼠模型和ALS患者中,沿周圍運動神經元軸突的巨噬細胞能對神經退行作出反應。在ALS小鼠中,外周髓樣細胞浸潤進入脊髓受到限制,並取決於疾病持續時間。使用細胞替換,ALS小鼠外周血髓細胞中活性氧途徑的靶向基因調節,減少了外周巨噬細胞和小膠質細胞的活化,延遲了症狀並提高了存活率。
轉錄組學研究表明,坐骨神經巨噬細胞和小膠質細胞對神經變性的反應不同,巨噬細胞的瞬時時間變化與進程以及小膠質細胞的單向激活。修飾外周巨噬細胞抑制了促炎性小膠質細胞反應,並轉向神經元支持。因此,在外周修飾巨噬細胞具有影響疾病進展的能力,並且可能對ALS具有治療價值。
研究人員表示,小膠質細胞和外周巨噬細胞均與ALS有關,儘管它們各自的作用尚未確定。
附:英文原文
Title: Modifying macrophages at the periphery has the capacity to change microglial reactivity and to extend ALS survival
Author: Aude Chiot, Sakina Zadi, Charlne Iltis, Matthieu Ribon, Flix Berriat, Lorenzo Schiaffino, Ariane Jolly, Pierre de la Grange, Michel Mallat, Delphine Bohl, Stphanie Millecamps, Danielle Seilhean, Christian S. Lobsiger, Sverine Boille
Issue&Volume: 2020-10-19
Abstract: Microglia and peripheral macrophages have both been implicated in amyotrophic lateral sclerosis (ALS), although their respective roles have yet to be determined. We now show that macrophages along peripheral motor neuron axons in mouse models and patients with ALS react to neurodegeneration. In ALS mice, peripheral myeloid cell infiltration into the spinal cord was limited and depended on disease duration. Targeted gene modulation of the reactive oxygen species pathway in peripheral myeloid cells of ALS mice, using cell replacement, reduced both peripheral macrophage and microglial activation, delayed symptoms and increased survival. Transcriptomics revealed that sciatic nerve macrophages and microglia reacted differently to neurodegeneration, with abrupt temporal changes in macrophages and progressive, unidirectional activation in microglia. Modifying peripheral macrophages suppressed proinflammatory microglial responses, with a shift toward neuronal support. Thus, modifying macrophages at the periphery has the capacity to influence disease progression and may be of therapeutic value for ALS. Peripheral macrophages located along motor axons react differently to neurodegeneration compared to CNS microglia in ALS mice. Modifying peripheral macrophages suppresses proinflammatory microglial responses, shifting them toward neuronal support.
DOI: 10.1038/s41593-020-00718-z
Source: https://www.nature.com/articles/s41593-020-00718-z