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Dpp spreading is required for medial but not for lateral wing disc growth

机译:Dpp散布对于内侧是必需的,但对于侧翼圆盘的生长不是

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摘要

Drosophila Decapentaplegic (Dpp) has served as a paradigm to study morphogen-dependent growth control. However, the role of a Dpp gradient in tissue growth remains highly controversial. Two fundamentally different models have been proposed: the 'temporal rule' model suggests that all cells of the wing imaginal disc divide upon a 50% increase in Dpp signalling, whereas the 'growth equalization model' suggests that Dpp is only essential for proliferation control of the central cells. Here, to discriminate between these two models, we generated and used morphotrap, a membrane-tethered anti-green fluorescent protein (GFP) nanobody, which enables immobilization of enhanced (e)GFP:: Dpp on the cell surface, thereby abolishing Dpp gradient formation. We find that in the absence of Dpp spreading, wing disc patterning is lost; however, lateral cells still divide at normal rates. These data are consistent with the growth equalization model, but do not fit a global temporal rule model in the wing imaginal disc.
机译:果蝇Decapentaplegic(Dpp)已成为研究吗啡依赖性生长控制的范例。但是,Dpp梯度在组织生长中的作用仍然存在很大争议。已经提出了两个根本不同的模型:“时间规则”模型表明机翼假想盘的所有细胞在Dpp信号传导增加50%的情况下分裂,而“生长均衡模型”表明Dpp仅对控制扩散至关重要。中央细胞。在这里,为了区分这两种模型,我们生成并使用了morphotrap,它是一种膜连接的抗绿色荧光蛋白(GFP)纳米抗体,可将增强的(e)GFP :: Dpp固定在细胞表面,从而消除Dpp梯度编队。我们发现,在没有Dpp扩散的情况下,机翼盘图案会丢失;但是,外侧细胞仍以正常速率分裂。这些数据与增长均衡模型一致,但不适合机翼假想盘中的全局时间规则模型。

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  • 来源
    《Nature》 |2015年第7578期|317-322|共6页
  • 作者单位

    Univ Basel, Biozentrum, Growth & Dev, Klingelbergstr 50-70, CH-4056 Basel, Switzerland;

    Univ Lausanne, Ctr Integrat Genom, CH-1015 Lausanne, Switzerland;

    Univ Basel, Biozentrum, Growth & Dev, Klingelbergstr 50-70, CH-4056 Basel, Switzerland;

    Univ Basel, Biozentrum, Growth & Dev, Klingelbergstr 50-70, CH-4056 Basel, Switzerland|Univ Zurich, IMLS, CH-8057 Zurich, Switzerland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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