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首页> 外文期刊>Molecular and Cellular Biology >The Notch Signaling Pathway Controls the Size of the Ocular Lens by Directly Suppressing p57Kip2 Expression
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The Notch Signaling Pathway Controls the Size of the Ocular Lens by Directly Suppressing p57Kip2 Expression

机译:Notch信号通路通过直接抑制p57Kip2表达来控制人工晶状体的大小

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The size of an organ must be tightly controlled so that it fits within an organism. The mammalian lens is a relatively simple organ composed of terminally differentiated, amitotic lens fiber cells capped on the anterior surface by a layer of immature, mitotic epithelial cells. The proliferation of lens epithelial cells fuels the growth of the lens, thus controling the size of the lens. We report that the Notch signaling pathway defines the boundary between proliferation and differentiation in the developing lens. The loss of Notch signaling results in the loss of epithelial cells to differentiation and a much smaller lens. We found that the Notch effector Herp2 is expressed in lens epithelium and directly suppresses p57Kip2 expression, providing a molecular link between Notch signaling and the cell cycle control machinery during lens development.
机译:必须严格控制器官的大小,以使其适合有机体。哺乳动物晶状体是一种相对简单的器官,由末端分化的有丝分裂的晶状体纤维细胞组成,该细胞被一层未成熟的有丝分裂上皮细胞覆盖在前表面。晶状体上皮细胞的增殖促进了晶状体的生长,从而控制了晶状体的大小。我们报道,Notch信号通路定义了在发展中的晶状体增殖和分化之间的边界。 Notch信号传导的丧失导致上皮细胞丧失分化能力,并且晶状体更小。我们发现Notch效应子 Herp2 在晶状体上皮中表达,并直接抑制 p57 Kip2 表达,从而提供了分子镜头开发过程中,Notch信号与细胞周期控制机制之间的联系。

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