Epithelial rotation promotes the global alignment of contractile actin bundles during Drosophila egg chamber elongation.

Epithelial rotation promotes the global alignment of contractile actin bundles during Drosophila egg chamber elongation.
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DOI:
10.1038/ncomms6511
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发表时间:
2014-11-21
影响因子:
16.6
通讯作者:
Horne-Badovinac S
Horne-Badovinac S
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Cetera M;Ramirez-San Juan GR;Oakes PW;Lewellyn L;Fairchild MJ;Tanentzapf G;Gardel ML;Horne-Badovinac S

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Tissues use numerous mechanisms to change shape during development. The Drosophila egg chamber is an organ-like structure that elongates to form an elliptical egg. During elongation the follicular epithelial cells undergo a collective migration that causes the egg chamber to rotate within its surrounding basement membrane. Rotation coincides with the formation of a “molecular corset”, in which actin bundles in the epithelium and fibrils in the basement membrane are all aligned perpendicular to the elongation axis. Here we show that rotation plays a critical role in building the actin-based component of the corset. Rotation begins shortly after egg chamber formation and requires lamellipodial protrusions at each follicle cell’s leading edge. During early stages, rotation is necessary for tissue-level actin bundle alignment, but it becomes dispensable after the basement membrane is polarized. This work highlights how collective cell migration can be used to build a polarized tissue organization for organ morphogenesis.
层状肌球蛋白力产生的动态和结构特征。
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