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Cell Death Dis: 细胞自噬对小鼠听力是必要的

2017-05-19 AlexYang MedSci原创

听力损失是人类感官障碍中最为普遍的一种障碍。听毛细胞(HCs)是在胚胎晚期分化和出生后阶段通过有丝分裂产生的,听毛细胞的损伤是导致听力损失的主要原因。在哺乳动物耳蜗中,并不存在可以再生的可测量的听毛细胞,并且听毛细胞功能的保持对于听力的维持非常重要。最近,有研究人员在小鼠中产生了一个缺陷型突变体,该突变体基因为细胞自噬相关的基因5(Atg5),该基因对细胞自噬是不可或缺的。研究人员在听毛细胞中调查

听力损失是人类感官障碍中最为普遍的一种障碍。听毛细胞(HCs)是在胚胎晚期分化和出生后阶段通过有丝分裂产生的,听毛细胞的损伤是导致听力损失的主要原因。在哺乳动物耳蜗中,并不存在可以再生的可测量的听毛细胞,并且听毛细胞功能的保持对于听力的维持非常重要。

最近,有研究人员在小鼠中产生了一个缺陷型突变体,该突变体基因为细胞自噬相关的基因5(Atg5),该基因对细胞自噬是不可或缺的。研究人员在听毛细胞中调查了该基因在关于听觉锐度的基础细胞自噬中的影响。研究发现,Atg5基因的缺失能够导致听毛细胞的退化,并且加重了先天的听力损失。另外,在细胞自噬相关的缺陷型听毛细胞中,出生后第一周,细胞自噬的底物多泛素化蛋白和p62/SQSTM1以内含体的形式积累,并且这些内含体在数目上增加。最后研究人员指出,这些发现表明了基础的细胞自噬在听毛细胞的形态和听觉锐度上扮演着重要的角色。

原始出处:

Chisato Fujimoto, Shinichi Iwasaki, Shinji Urata et al. Autophagy is essential for hearing in mice. Cell Death Dis. 11 May 2017.

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    2017-12-21 维他命
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    2017-05-21 ysjykql
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    2017-05-21 cy0328

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