细胞因子反确保了信号特异性,当多个连接体汇聚到一个共同的受体时
Akshay Patel1,2, Molly Maranto1,3, Hind Hitti1
1Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland, USA.
细胞通信的特异性是通过两极化细胞系实现的,这些细胞系将不同的FGF配体Pyramus和Thisbe传递给Drosophila的成年肌肉前体 (AMP). 涉及无心 (Htl) 受体的反循环加强了这种连接体分离和信号特异性.
科学领域:
- 发展生物学 发展生物学
- 细胞信号传递 细胞信号传递
- 分子生物学分子生物学
背景情况:
- 细胞-细胞通信通常涉及多个连接体激活共享通路,这对实现特定的细胞反应构成挑战.
- 在Drosophila中,成年肌肉前体 (AMP) 通过无心 (Htl) 受体从FGF配体Pyramus和Thisbe接收信号,但这些配体引起不同的结果.
研究的目的:
- 研究当多个连接体作用于同一细胞类型时,信号特异性背后的机制.
- 了解多索菲拉AMP如何对Pyramus和Thisbe的FGF配体产生不同的反应.
主要方法:
- 在体内成像内源性Pyramus:mCherry和Thisbe:sfGFP敲进的.
- 对细胞因子介导的配体获取和受体结合的分析.
- 研究无心 (Htl) 尖轴在反调节中的作用.
主要成果:
- 皮拉姆斯和蒂斯贝配体在同位素AMP上分离成不同的受体结合区域.
- 联结体获取通过两极化,含有Htl的细胞系发生,这些细胞系与联结体来源接触.
- 半球体极性和目标特异性取决于位置,并由涉及Htl和Pointed的正反循环来调节.
结论:
- 细胞内在的反机制对于保持细胞膜极性和信号特异性至关重要.
- 细胞系赋予特定的信号通路激活的多个连接体在单个祖先群体内.
- 这项研究揭示了细胞突起如何建立和保持信号忠实性的一般原则.
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