eLife:研究人员发现可能恢复受损听觉细胞的蛋白质

2019-08-11 海北 MedSci原创

促进听觉感觉分化并指导其分级模式的分子信号在很大程度上是未知的。

哺乳动物听觉感觉上皮具有脊椎动物中已知的最刻板的细胞模式之一。

机械感觉毛细胞有着精确的行排列,其中一行内毛细胞和三行外毛细胞跨越螺旋形感觉上皮的长度。

辅助这种精确的细胞图案化,听觉感觉上皮细胞的分化是精确定时的,并且遵循陡峭的纵向梯度。

促进听觉感觉分化并指导其分级模式的分子信号在很大程度上是未知的。

最近,研究人员鉴定出激活素A及其拮抗剂卵泡抑素作为毛细胞分化的关键调节剂,并且使用小鼠遗传方法显示,听觉感觉上皮中的激活素A信号传导的局部梯度决定毛细胞分化的纵向梯度。

此外,该研究提供的证据表明,激活素型信号传导调节听觉感觉上皮内的末端有丝分裂的径向梯度,这构成了限制所产生的内毛细胞数量的新机制。


原始出处:

Meenakshi Prajapati-DiNubila et al. A counter gradient of Activin A and follistatin instructs the timing of hair cell differentiation in the murine cochlea. eLife, 2019; 8 DOI: 10.7554/eLife.47613


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    2019-11-17 clmlylxy
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    2020-05-09 膀胱癌
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