两种内源性Dictyostelium discoideum化学排斥剂使用不同的机制来诱导排斥
Mohanad H El-Sobky1, Ramesh Rijal1, Richard H Gomer1
1Department of Biology, Texas A&M University, College Station, TX 77843-3474.
概括
迪西奥斯特利乌姆 (Dictyostelium discoideum) 使用两种驱动细胞运动的驱动剂:aprA蛋白和多酸盐 (polyP). 这些分子触发了不同的信号通路,以控制发育和免疫反应期间的细胞排斥.
科学领域:
- 细胞生物学 细胞生物学
- 发育生物学是发展生物学.
- 生物化学 生化学
背景情况:
- 定向的真核细胞运动对于发育和免疫是至关重要的.
- 化疗排斥,与化疗吸引不同,人们对其理解较少.
- 狄基托斯蒂 (Dictyostelium discoideum) 类虫使用分泌的因子来驱逐细胞.
研究的目的:
- 确定D. discoideum分泌的<10kDa的化学排斥剂.
- 阐明AprA和polyP介导的排斥的不同机制.
- 描述化学排斥所涉及的信号通路.
主要方法:
- 生物化学分析以确定<10kDa的化学驱剂.
- 活细胞成像,观察细胞运动和伪足形成.
- 基因分析以确定参与排斥的信号蛋白.
主要成果:
- 化学排斥剂<10kDa被确定为多酸盐 (polyP).
- AprA抑制了Ras激活和近侧的伪肢形成.
- 聚P广泛地激活Ras,增加伪足形成,特别是在远侧.
- 对于AprA和polyP排斥,需要不同的信号传导蛋白.
结论:
- D. discoideum 使用两种不同的化学排斥剂:AprA和polyP.
- 聚聚是一种不寻常的分子,被用作化学排斥剂.
- AprA和polyP通过不同的机制激活部分重叠但不同的信号通路来诱导排斥.
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