Long-range Notch-mediated tissue patterning requires actomyosin contractility
Long-range Notch-mediated tissue patterning requires actomyosin contractility
复制标题
长程Notch介导的组织模式需要肌动球蛋白收缩性
DOI:
10.1101/259341
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Hunter G
中科院分区:
文献类型:
--
作者:
Hunter G
Dynamic, actin-based protrusions function in cell-cell signaling in a variety of systems. In the dorsal thorax of the developing fly, basal protrusions enable non-neighboring epithelial cells to touch, extending the range over which Notch-mediated lateral inhibition can occur during bristle patterning. Given that actin-based cell protrusions can exert mechanical forces on their environment and Notch receptor activation is mechanically sensitive, how might cytoskeletal contractility contribute to Notch signaling? We identify a pool of basal non-muscle myosin II (myosin II) that regulates protrusion dynamics, promotes Notch signaling, and is required in signal sending and receiving cells for Notch-dependent patterning. We show that interactions between protrusions are extensive and subject to actomyosin contractility. The effects of reducing myosin II activity are more pronounced for protrusion-mediated signaling than for signaling at lateral cell contacts. Together, these results reveal a role for actomyosin contractility in Notch activation, signaling, and patterning in a developmental context.
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