The function of endocytosis in Wnt signaling.

The function of endocytosis in Wnt signaling.
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DOI:
10.1007/s00018-017-2654-2
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发表时间:
2018-03
期刊:
Cellular and molecular life sciences : CMLS
影响因子:
--
通讯作者:
Scholpp S
Scholpp S
中科院分区:
其他
文献类型:
--
作者:
Brunt L;Scholpp S

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Wnt生长因子调节发育、组织稳态和疾病过程中最重要的信号网络之一。尽管Wnt信号传导的生物学重要性,但在此过程中的内吞作用机制描述不佳。Wnt分子可以作为旁分泌信号,从产生细胞分泌并通过邻近组织运输以激活靶细胞中的信号传导。配体的内吞作用在几个作用阶段是重要的:Wnt途径中的内吞运输的一个中心功能发生在源细胞中。此外,β-连环蛋白依赖性Wnt配体需要胞吞作用以激活信号并调节应答细胞中的基因转录。或者,Wnt/β-连环蛋白非依赖性信号传导调节细胞粘附斑块的内吞作用以控制细胞迁移。在这篇比较综述中,我们阐明了这三个相互关联的基本功能,它们共同调节细胞命运和细胞行为。基于已建立的假设和最近的研究结果,我们开发了一个修订的图片内吞作用的Wnt信号网络中的复杂功能。
Wnt growth factors regulate one of the most important signaling networks during development, tissue homeostasis and disease. Despite the biological importance of Wnt signaling, the mechanism of endocytosis during this process is ill described. Wnt molecules can act as paracrine signals, which are secreted from the producing cells and transported through neighboring tissue to activate signaling in target cells. Endocytosis of the ligand is important at several stages of action: One central function of endocytic trafficking in the Wnt pathway occurs in the source cell. Furthermore, the β-catenin-dependent Wnt ligands require endocytosis for signal activation and to regulate gene transcription in the responding cells. Alternatively, Wnt/β-catenin-independent signaling regulates endocytosis of cell adherence plaques to control cell migration. In this comparative review, we elucidate these three fundamental interconnected functions, which together regulate cellular fate and cellular behavior. Based on established hypotheses and recent findings, we develop a revised picture for the complex function of endocytosis in the Wnt signaling network.
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