Global tissue revolutions in a morphogenetic movement controlling elongation.
Global tissue revolutions in a morphogenetic movement controlling elongation.
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DOI:
10.1126/science.1199424
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发表时间:
2011-02-25
期刊:
影响因子:
--
通讯作者:
Bilder D
中科院分区:
文献类型:
--
作者:
Haigo SL;Bilder D
Polarized cell behaviors drive axis elongation in animal embryos, but the mechanisms underlying elongation of many tissues remain unknown. Eggs of Drosophila undergo elongation from a sphere to an ellipsoid during oogenesis. Here, we use live imaging of follicles (developing eggs) to elucidate the cellular basis of egg elongation. We find that elongating follicles undergo repeated rounds of circumferential rotation around their long axes. Follicle epithelia mutant for Integrin or Collagen IV fail to rotate and elongate, resulting in round eggs. We present evidence that polarized rotation is required to build a polarized, fibrillar extracellular matrix (ECM) that constrains tissue shape. Thus, global tissue rotation is a novel morphogenetic behavior that uses planar polarity information in the ECM to control tissue elongation.
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