Is a persistent global bias necessary for the establishment of planar cell polarity?

Is a persistent global bias necessary for the establishment of planar cell polarity?
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DOI:
10.1371/journal.pone.0060064
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Owen MR
Owen MR
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Fischer S;Houston P;Monk NA;Owen MR

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平面细胞极性(PCP)-组织平面内整个细胞场的协调极化-依赖于三个模块的相互作用:将单个细胞极性耦合到组织轴的全局模块,对齐相邻细胞极化轴的局部模块,以及指导PCP调节结构(如毛发和刚毛)正确生长的读出模块。虽然对五氯苯酚所需的分子成分了解很多,但这些模块的功能细节以及模块之间的相互作用仍不清楚。在这项工作中,我们对两个先前提出的局部模块的计算模型进行了数学和计算分析(Amonlirdviman等人,Science,307,2005; Le Garrec等人,Dev.动力学:235,2006)。这两种模型都可以重现野生型和突变体的PCP表型观察果蝇翅膀的假设下,从全球模块的组织范围内的极性线索持续整个发展的PCP。我们证明,这两种模型也可以产生组织水平的PCP时,只提供一个短暂的初始极性提示。然而,在这些模型中,这样的瞬态线索不足以确保所得到的细胞极化的鲁棒性。
Planar cell polarity (PCP)–the coordinated polarisation of a whole field of cells within the plane of a tissue–relies on the interaction of three modules: a global module that couples individual cellular polarity to the tissue axis, a local module that aligns the axis of polarisation of neighbouring cells, and a readout module that directs the correct outgrowth of PCP-regulated structures such as hairs and bristles. While much is known about the molecular components that are required for PCP, the functional details of–and interactions between–the modules remain unclear. In this work, we perform a mathematical and computational analysis of two previously proposed computational models of the local module (Amonlirdviman et al., Science, 307, 2005; Le Garrec et al., Dev. Dyn., 235, 2006). Both models can reproduce wild-type and mutant phenotypes of PCP observed in the Drosophila wing under the assumption that a tissue-wide polarity cue from the global module persists throughout the development of PCP. We demonstrate that both models can also generate tissue-level PCP when provided with only a transient initial polarity cue. However, in these models such transient cues are not sufficient to ensure robustness of the resulting cellular polarisation.
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