相关实验视频
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Quantification of Efferocytosis by Single-cell Fluorescence Microscopy
Published on: August 18, 2018
BAI1是ELMO/Dock180/Rac模块上游的亡细胞的吞受体
Daeho Park1, Annie-Carole Tosello-Trampont, Michael R Elliott
1Department of Cell Biology, University of Virginia, Charlottesville, Virginia 22908, USA.
Nature
|October 26, 2007
概括
脑特异性血管生成抑制剂1 (BAI1) 作为一种 binding phosphatidylserine 的受体,与细胞结核细胞结合. BAI1招募了ELMO/Dock180/Rac模块,以调解有效地吞细胞碎片.
科学领域:
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
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.
- ELMO/Dock180/Rac模块在细胞尸体吞过程中调节细胞的活性细胞骨架.
- 目前尚不清楚ELMO/Dock180/Rac模块上游的受体.
研究的目的:
- 为了识别ELMO/Dock180/Rac信号模块上游的受体.
- 为了研究大脑特异性血管生成抑制剂1 (BAI1) 在亡细胞吞中的作用.
- 确定BAI1的配体及其在细胞清除中的机制.
主要方法:
- 鉴定BAI1作为一种新型吞受体.
- 生物化学测试以证明BAI1与脂胺素结合.
- 使用ex vivo和in vivo模型进行功能性研究,以评估BAI1在吞中的作用.
- 同免疫沉显示BAI1复合形成与ELMO和Dock180.0.
主要成果:
- BAI1被确定为一种与酸丁素结合的受体,这是亡细胞上的"吃我"信号.
- BAI1 的 1 种类型的血栓素重复介导直接的脂胺酶结合.
- BAI1与ELMO和Dock180组成一个综合体,与Rac-GEF模块合作.
- 降低BAI1功能会损害体外和体内细胞的亡.
结论:
- BAI1 作为脂胺素识别受体,对亡细胞吞至关重要.
- BAI1直接招募ELMO/Dock180/Rac复合体,以促进细胞清除.
- 这一发现揭示了对细胞的调节的一个关键途径.
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