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Nat Commun:LMO7缺失阐释了角皮层对听力功能的重要性

2019-03-29 AlexYang MedSci原创

感觉毛细胞是听觉和前庭系统的机械感受响应器,且具有2种特化的顶端表面结构,即毛束和角质层面。与大量研究所指出的机械感应毛束功能不同,角质层的功能所知甚少。毋庸置疑的是,角质层能够为静纤毛运动提供坚实的基础,但是其功能的细节,尤其是其完整性对毛细胞机械转导长期维持的意义仍旧未知。最近,有研究人员发现一个称为LIM的毛细胞蛋白7(LMO7)特异性的定位在角质层和细胞连接处。Lmo7 KO小鼠表现为多重

感觉毛细胞是听觉和前庭系统的机械感受响应器,且具有2种特化的顶端表面结构,即毛束和角质层面。与大量研究所指出的机械感应毛束功能不同,角质层的功能所知甚少。

毋庸置疑的是,角质层能够为静纤毛运动提供坚实的基础,但是其功能的细节,尤其是其完整性对毛细胞机械转导长期维持的意义仍旧未知。最近,有研究人员发现一个称为LIM的毛细胞蛋白7(LMO7)特异性的定位在角质层和细胞连接处。Lmo7 KO小鼠表现为多重角质层缺陷,包括减少了的丝状肌动蛋白密度和异常的静纤毛小根。除了角质层缺陷,年龄较大的Lmo7 KO小鼠的内耳毛细胞静纤毛异常。

最后,研究人员指出,他们的数据表明了这些缺失能够影响耳蜗调谐和灵敏度,并导致晚发渐进性听力损失风险的提升。

原始出处:

Du TT, Dewey JB, Wagner EL et al. LMO7 deficiency reveals the significance of the cuticular plate for hearing function. Nat Commun. Mar 8 2019.

本文系梅斯医学(MedSci)原创编译整理,转载需授权!

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    2020-02-04 mgqwxj
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    2019-07-26 liye789132251
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    2019-08-26 liuli5079
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    2019-03-31 ysjykql

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