CRB3 通过 Rab11 贩运囊泡进行导航,在纤毛发育过程中促进 γTuRC 组装
Bo Wang1,2, Zheyong Liang1,3, Tan Tan4
1Center for Translational Medicine, the First Affiliated Hospital of Xi'an Jiaotong University, Shaanxi, China.
eLife
|September 22, 2023
概括
细胞极性蛋白CRB3在囊泡中导航,以构建主要毛,这对于组织组织至关重要. CRB3 功能障碍会破坏乳毛,影响细胞信号传递,促进癌症.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 发展生物学 发展生物学
背景情况:
- 初级毛对于细胞分化,信号转导和组织组织至关重要.
- 主要毛功能障碍与毛病和癌症有关.
- 细胞极性蛋白,如CRB3,参与初级膜形成,但CRB3的作用尚不清楚.
研究的目的:
- 阐明CRB3调节纤维生成的分子机制.
- 为了确定在纤毛发育过程中CRB3的局部化和贩运.
- 调查CRB3在初级乳毛相关信号通路和瘤发生中的作用.
主要方法:
- 使用显微镜进行CRB3定位研究.
- 使用Rab11阳性内分泌体进行CRB3贩运分析.
- 与GCP6和CEP的CRB3相互作用研究290.0.
- 在CRB3淘汰赛小鼠中对初级毛缺陷的分析.
- 研究CRB3-贫乏细胞中Hh和Wnt信号通路的激活.
主要成果:
- 在纤毛发育过程中,CRB3作为导航器,在γ-素环复合体 (γTuRC) 组合中进行囊泡贩运.
- 在CRB3淘汰赛小鼠中,乳腺管和管中表现出初级毛缺陷.
- 乳腺上皮特异性CRB3淘汰促进增生和瘤发生.
- CRB3定位在基底体,并通过Rab11阳性内分泌体被贩运.
- CRB3与Rab11和GCP6相互作用,将囊泡送到CEP290进行γTuRC组装.
- 在哺乳动物上皮质中,CRB3对于光膜形成和状细胞组合至关重要.
- CRB3 枯竭会损害 Hh 信号,但会调节 Wnt 信号.
结论:
- 通过导航Rab11阳性内分泌体进行γTuRC组装,CRB3对于初级乳毛形成和功能至关重要.
- CRB3在乳腺上皮膜光形成和纤维形成中发挥着至关重要的作用.
- CRB3对纤毛发育和纤毛相关信号通路 (Hh,Wnt) 的调节对于预防瘤发育至关重要.
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