鉴定了两种在进化过程中保存的基因,这些基因调节了被吞的亡细胞的处理过程
Jason M Kinchen1, Kodi S Ravichandran
1Center for Cell Clearance, University of Virginia, Charlottesville, Virginia 22908, USA. kinchen@virginia.edu
Nature
|March 23, 2010
概括
科学家们发现SAND-1 (Mon1) 和CCZ-1 (Ccz1) 对于清除亡细胞至关重要. 这些蛋白质调节细胞成熟,通过确保多细胞生物体的正确尸体清除来预防自身免疫性疾病.
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:
- 细胞亡的细胞清除对于多细胞生物来说至关重要.
- 清除亡细胞的缺陷可能导致自身免疫性疾病.
- 识别细胞吞的关键调节者对于了解疾病机制至关重要.
研究的目的:
- 为了确定涉及到亡细胞尸体移除不同阶段的新型因素.
- 阐明这些因素调节体成熟的机制.
- 为了确定细胞清除中的这些因素的进化保存.
主要方法:
- 在Caenorhabditis elegans的遗传研究.
- 在哺乳动物细胞中进行细胞生物学和分子分析.
- 通过RAB-5和RAB-7招募试验,研究了SAND-1和CCZ-1在细胞成熟中的作用.
主要成果:
- SAND-1和CCZ-1对于发酵细胞从RAB-5阶段向RAB-7阶段的进展至关重要.
- 哺乳动物的正方体Mon1a和Mon1b也需要用于菌体成熟.
- Mon1 起到 Rab5 效应的作用,而 Mon1-Ccz1 复合体将 Rab5 和 Rab7 途径连接起来.
结论:
- SAND-1 (Mon1) 和CCZ-1 (Ccz1) 是关键的,在进化过程中保存的组成部分,调节了细胞亡的细胞尸体处理.
- 这些蛋白质对于正确的细胞成熟至关重要,将早期和晚期相连.
- 在SAND-1/Mon1和CCZ-1/Ccz1功能中存在的缺陷可能会导致自身免疫性疾病,原因是细胞缩清除受损.
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