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首页> 外文期刊>Journal of Cellular Physiology >S100A1 and S100B: Calcium Sensors at the Cross-Roads of Multiple Chondrogenic Pathways
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S100A1 and S100B: Calcium Sensors at the Cross-Roads of Multiple Chondrogenic Pathways

机译:S100A1和S100B:钙的传感器十字路口,多个Chondrogenic通路

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The S100 protein family comprises more than 20 members of small calcium binding proteins operating as Ca2+-activated switches that interact and modulate the activity of a large number of targets. S100A1 and S100B, two members of this family, have been recently associated with the differentiation status of human articular chondrocytes. Both proteins are homogeneously expressed in all cartilage zones, their expression decreases during chondrocyte dedifferentiation, and can be induced under conditions promoting redifferentiation. Although S100 proteins have a broad range of extra- and intracellular roles, functional studies of S100 proteins expressed in chondrocytes have focused on their extracellular roles linked to catabolic processes. The intracellular roles of S100A1 and S100B in chondrocytes remain largely unexplored, yet the few studies addressing their intracellular activity point toward potentially important functions in chondrocyte biology. This review summarizes reported intracellular S100A1 and S100B regulatory functions described in other cell types that could be also involved in the regulation of chondrogenic processes in cartilage. Potential roles of S100A1 and S100B in the TGF--SMAD, the cAMP-PKA-CREB, and the PI3K-AKT pathways, Ca2+ homeostasis, cytoskeleton dynamics, the calcineurin-NFAT pathway, interactions with the p53 family, and the Hippo pathway are examined in the context of chondrocyte biology. Based on the plethora of interactions of S100A1 and S100B with different molecular partners playing essential roles in chondrocyte biology, and the staggering complexity and ubiquity of cross-talk among these partners, we hypothesize that these S100 proteins play fundamental roles in the spatial and temporal regulation of chondrogenesis. J. Cell. Physiol. 232: 1979-1987, 2017. (c) 2016 Wiley Periodicals, Inc.
机译:S100蛋白家族包括超过20个小钙结合蛋白的成员操作Ca2 +激活开关相互作用和调节一个大型的活动数量的目标。这个家庭,最近相关人类的分化状态关节软骨细胞。在所有软骨区均匀表示,在软骨细胞表达减少去分化,可以诱导下条件促进再分化。S100蛋白有一个广泛的额外的,细胞内的角色,S100的功能研究蛋白质表达的软骨细胞集中细胞外的角色与分解流程。S100B在软骨细胞在很大程度上仍未知,然而,一些研究解决他们细胞内活动指向潜在的软骨细胞生物学的重要功能。回顾总结了胞内S100A1报道中描述和S100B监管职能细胞类型也可以参与chondrogenic过程的监管软骨。TGF——SMAD cAMP-PKA-CREB,PI3K-AKT pathways Ca2 +稳态、细胞骨架动力学,calcineurin-NFAT通路,交互和p53的家人,河马通路是检查的环境中软骨细胞生物学。S100A1和S100B的相互作用不同分子伴侣扮演重要的角色软骨细胞生物学,和惊人的其中复杂性和无处不在的相声合作伙伴,我们假设这些S100蛋白在空间和发挥着根本性的作用颞软骨形成的监管。杂志。232:1979 - 1987年,2017年。期刊、公司。

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