自促进了初级纤毛发育,通过将OFD1从中心卫星中移除
Zaiming Tang1, Mary Grace Lin, Timothy Richard Stowe
1Center for Autophagy Research, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.
Nature
|October 4, 2013
概括
自会降解中心卫星的OFD1蛋白质,促进初级膜的形成. 这一过程对于正常细胞和癌细胞的纤毛发育至关重要,揭示了自在有机体生物发育中的新作用.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 初级毛是基于微管的器官,对细胞感觉和信号通路至关重要.
- 初级乳毛形成 (乳毛发育) 的缺陷与被称为乳毛病的遗传疾病有关.
- 初级纤毛发育的调节机制,特别是癌细胞中的调节机制,仍然在很大程度上是未知的.
研究的目的:
- 调查OFD1 (口腔-面部-数字综合征1) 自降解在初级纤毛生物发生中的作用.
- 阐明调节中心卫星OFD1水平的机制.
- 确定通过自去除OFD1是否能促进包括癌细胞在内的各种细胞类型的纤维生成.
主要方法:
- 使用了缺少自的小鼠胚胎纤维细胞 (Atg5或Atg3无).
- 通过免疫光和生化分析检查了OFD1的局部化和降解.
- 在对OFD1操纵和自状态的反应中评估了初级毛形成和BBS4招募.
- 在循环细胞和MCF7乳腺癌细胞中研究了OFD1耗尽效应.
主要成果:
- 发现在中心卫星上OFD1的自降解促进了初级纤毛生物发生.
- 血清饥饿诱导了OFD1.1的快速自降解.
- 自性缺陷导致OFD1积累,导致较少和较短的初级乳毛和受损的BBS4招募.
- 部分OFD1倒置挽救了这些缺陷.
- 在正常循环细胞和通常缺乏乳腺的MCF7乳腺癌细胞中,OFD1枯竭增强了乳毛形成.
结论:
- 在中心卫星中通过自去除OFD1是一种促进哺乳动物细胞纤维生成的一般机制.
- 这项研究确定了自在有机体生物发生过程中的新作用,特别是在调节初级眼方面.
- 了解这种途径可以为纤毛病和相关癌症提供新的治疗策略.
相关概念视频
Microtubules in Signaling
2.2K
The primary cilium, made up of microtubules, acts as antennae on the cell surfaces for relaying external stimuli into the cells. These fine hair-like structures are present, generally one per cell. These are non-motile cilia in a 9+0 microtubules arrangement, where the central pair of microtubules are absent. The primary cilia arise from the basal body embedded in the cell membrane. Intraflagellar transport (IFT) carries requisite proteins from the cytoplasm to the cilium because the primary...
2.2K
Autophagy
6.0K
Autophagy is a self-digesting process by which a cell protects itself from threats both within and outside the cell, ranging from abnormal proteins to invading bacteria. In this process, obsolete components of the cell and invading microbes are degraded by hydrolytic enzymes active in an acidic environment of the lysosomal lumen.
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
6.0K
Anaphase Promoting Complex
3.5K
The stepwise destruction of specific proteins is necessary for the progression and completion of the cell cycle. Such proteins are ubiquitinated by ubiquitin ligases and then subsequently destroyed by the proteasome. The SCF (Skp1/Cullin/F-box) and the anaphase-promoting complex (APC) are two important ubiquitin ligases involved in cell cycle progression. While SCF is active throughout the cell cycle, APC gets activated during metaphase to anaphase transition. Cdc20 or Cdh1 binds to APC and...
3.5K
Centrosome Duplication
5.1K
The primary microtubule organizing center (MTOC) in animal cells is the centrosome. A centrosome has two cylindrical centrioles at its core. Each centriole consists of nine sets of three microtubules held together by proteins. The centrioles are positioned at right angles to each other and surrounded by a shapeless protein cloud called the pericentriolar matrix, or pericentriolar material (PCM).
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...
5.1K
Centrosome Duplication
2.8K
No description available
2.8K
Centrioles and Centrosomes
7.1K
Most animal cells comprise a pair of centrioles together called a centrosome. The cell duplicates its centrosome and contains two centrosomes side-by-side, which begin to move apart during the prophase. As the centrosomes migrate to two different sides of the cell, microtubules start extending from each centrosome toward the other end. The mitotic spindle is composed of the centrosomes and their emerging microtubules.
Near the end of the prophase, also called late prophase or...
Near the end of the prophase, also called late prophase or...
7.1K


