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The WNT signal transduction cascade controls myriad biological phenomena throughout development and adult life of all animals. In parallel, aberrant Wnt signaling underlies a wide range of pathologies in humans. In this Review, we provide an update of the core Wnt/β-catenin signaling pathway, discuss how its various components contribute to disease, and pose outstanding questions to be addressed in the future. 相似文献
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《Organogenesis》2013,9(2):92-99
Wnt/β-catenin signaling has come to the forefront of liver biology in recent years. This pathway regulates key pathophysiological events inherent to the liver including development, regeneration, and cancer, by dictating several biological processes such as proliferation, apoptosis, differentiation, adhesion, zonation and metabolism in various cells of the liver. This review will examine the studies that have uncovered the relevant roles of Wnt/β-catenin signaling during the process of liver development. We will discuss the potential roles of Wnt/β-catenin signaling during the phases of development, including competence, hepatic induction, expansion, and morphogenesis. In addition, we will discuss the role of negative and positive regulation of this pathway and how the temporal expression of Wnt/β-catenin can direct key processes during hepatic development. We will also identify some of the major deficits in the current understanding of the role of Wnt/β-catenin signaling in liver development in order to provide a perspective for future studies. Thus, this review will provide a contextual overview of the role of Wnt/β-catenin signaling during hepatic organogenesis. 相似文献
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Hippo/YAP通路和Wnt/β-catenin通路是在细胞的生长分化、组织器官形成以及成体干细胞的维持等方面都起着重要作用的两条信号通路。在哺乳动物细胞中,Wnt/β-catenin通路通过一系列胞质蛋白的相互作用,使β-catenin蛋白在胞质内累积,进而入核传递生长刺激信号。Hippo/YAP通路通过激酶级联反应磷酸化YAP/TAZ,使其滞留在细胞质中,抑制了YAP/TAZ的转录活性,从而限制细胞的生长增殖,诱导细胞凋亡。这两条通路的异常调控往往会导致肿瘤的发生。近年来越来越多的研究证实,Hippo/YAP和Wnt/β-catenin在很多方面相互影响,共同参与组织生长和胚胎发育的调控。研究这两个通路在肿瘤发生过程中的转导和调控以及它们相互作用的机制,有助于为肿瘤的防治提供新的思路与策略。文章对这两条通路的协同作用及其分子机制进行了综述。 相似文献
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Downregulation or loss of α-catenin occurs in multiple human cancer types. The traditional view of α-catenin is that it is one of the core components of the E-cadherin-catenin complex and is required for maintaining the integrity of the intercellular adherens junction, a cell junction whose cytoplasmic face is linked to the actin cytoskeleton. Therefore, loss of α-catenin can result in loss of cell-cell adhesion, a common characteristic of cancer cells. There is an emerging recognition; however, that α-catenin also regulates multiple signaling pathways independent of adherens junctions. For instance, α-catenin functions as a tumor suppressor in E-cadherin-negative basal like breast cancer cells by inhibiting NF-κB signaling. In this perspective, we discuss the role and mechanisms of α-catenin in regulating several signaling pathways in cancer. 相似文献
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Xiaofang Wang Zhan Zhang Xianxu Zeng Jinming Wang Linlin Zhang Wanyu Song Ying Shi 《Journal of molecular histology》2018,49(3):317-327
This study aims to elucidate the mechanisms of Wnt/β-catenin signaling pathway in the development of preeclampsia (PE). The mRNA levels of Wnt1, β-catenin, c-myc and cyclinD1 were determined by real-time PCR in the placentas. Moreover, the expression levels of Wnt1, β-catenin, Dickkopf-1 (DKK1) and glycogen synthase kinase 3β (GSK-3β) proteins were detected by Western blot. Immunohistochemistry was used in placental tissue microarray to localize the expression of Wnt1, β-catenin, DKK1 proteins in the placentas of two groups. Compared with the control placentas, the mRNA levels of Wnt1, β-catenin, c-myc and cyclinD1 were decreased in the severe preeclamptic placentas. The Western blot results showed that the expression levels of Wnt1, β-catenin, and GSK-3β proteins were significantly elevated in the control group, while the expression level of DKK1 was significantly decreased. In addition, the staining intensity of Wnt1, β-catenin were weaker in the placentas of the severe PE group while the staining intensity of DKK1 was significantly stronger in the placentas of the severe PE group. Wnt/β-catenin signaling pathway may play a significant role in the pathogenesis of PE by regulating the invasion and proliferation of trophoblast. 相似文献
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《现代生物医学进展》2014,(25)
Wnt信号通路包括经典通路和非经典通路两种,其中Wnt经典通路又称为Wnt/β-catenin通路,其在成骨细胞的分化、增殖过程中发挥这重要的作用。Wnt信号通路实现过程中有多种因子参与,包括Wnt蛋白、β-catenin、蛋白激酶GSK-3β以及APC蛋白等多种。Wnt蛋白家族是由19种Wnt蛋白组成的,主要分为经典Wnt蛋白和非经典Wnt蛋白,其本质是一系列高度保守的分泌性糖蛋白,并且不同的Wnt蛋白对成骨细胞发挥着不同的作用,其中经典Wnt蛋白通过经典Wnt信号作用于成骨细胞对成骨细胞的增殖、分化有着重要的影响。本综述通过对Wnt经典信号通路过程中的多种因子与成骨细胞分化、增殖的关系进行分析总结,了解Wnt/β-catenin通路对成骨细胞的作用。 相似文献
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The canonical Wnt/β-catenin pathway is an essential component of multiple developmental processes. To investigate the role of this pathway in the ectoderm during facial morphogenesis, we generated conditional β-catenin mouse mutants using a novel ectoderm-specific Cre recombinase transgenic line. Our results demonstrate that ablating or stabilizing β-catenin in the embryonic ectoderm causes dramatic changes in facial morphology. There are accompanying alterations in the expression of Fgf8 and Shh, key molecules that establish a signaling center critical for facial patterning, the frontonasal ectodermal zone (FEZ). These data indicate that Wnt/β-catenin signaling within the ectoderm is critical for facial development and further suggest that this pathway is an important mechanism for generating the diverse facial shapes of vertebrates during evolution. 相似文献
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