An extended steepness model for leg-size determination based on Dachsous/Fat trans-dimer system.

An extended steepness model for leg-size determination based on Dachsous/Fat trans-dimer system.
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DOI:
10.1038/srep04335
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发表时间:
2014-03-11
期刊:
影响因子:
4.6
通讯作者:
Noji S
Noji S
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Yoshida H;Bando T;Mito T;Ohuchi H;Noji S

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决定器官大小的因素是一个长期存在的生物学问题。Lawrence等人(2008年)提出了陡度假设,表明原钙粘蛋白Dachsous/Fat(Ds/Ft)系统可以提供与梯度相关的细胞尺寸的一些测量。在本文中,我们扩展了该模型作为解释板球腿再生实验结果的一种手段。我们假设(1)Ds/Ft反式异源二聚体或反式同源二聚体在细胞分裂过程中重新分布,以及(2)当每个细胞中二聚体的差异降低到一定阈值时,生长将停止。我们应用我们的模型来模拟板球模型中的腿再生实验所获得的结果。结果与通过RNA干扰方法获得的蟋蟀腿的实验数据定性一致。使用我们的扩展陡度模型,我们提供了一个基于分子的解释腿的大小确定,即使在闰再生和器官大小的确定。
What determines organ size has been a long-standing biological question. Lawrence et al. (2008) proposed the steepness hypothesis suggesting that the protocadherin Dachsous/Fat (Ds/Ft) system may provide some measure of dimension to the cells in relation to the gradient. In this paper we extended the model as a means of interpreting experimental results in cricket leg regeneration. We assumed that (1) Ds/Ft trans-heterodimers or trans-homodimers are redistributed during cell division, and (2) growth would cease when a differential of the dimer across each cell decreases to a certain threshold. We applied our model to simulate the results obtained by leg regeneration experiments in a cricket model. The results were qualitatively consistent with the experimental data obtained for cricket legs by RNA interference methodology. Using our extended steepness model, we provided a molecular-based explanation for leg size determination even in intercalary regeneration and for organ size determination.
DOI: 10.1038/ncb1208-1379
发表时间: 2008-12-01
影响因子: 21.3
作者:
Lawrence, Peter A.;Struhl, Gary;Casal, Jose
通讯作者: Casal, Jose
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发表时间: 2008-09-30
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