Dynamics of adherens junctions in epithelial establishment, maintenance, and remodeling.

Dynamics of adherens junctions in epithelial establishment, maintenance, and remodeling.
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DOI:
10.1083/jcb.201009141
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发表时间:
2011-03-21
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Georgiou M
Georgiou M
中科院分区:
其他
文献类型:
--
作者:
Baum B;Georgiou M

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上皮钙黏蛋白(E - 钙黏蛋白)-连环蛋白复合物与细胞骨架成分以及调节和信号分子结合,形成成熟的黏附连接(AJ)。这种动态结构在物理上连接相邻的上皮细胞,将细胞间的黏附连接与细胞骨架耦合,并有助于确定每个细胞的顶 - 基底轴。这些活动共同协调上皮中所有细胞的形态、极性和功能。有几种分子调节黏附连接的形成和完整性,包括Rho家族的GTP酶和Par极性蛋白。然而,直到最近,随着活细胞成像技术的发展,人们才开始认识到E - 钙黏蛋白在连接处的动态周转程度。这种周转有助于黏附连接的形成以及在组织稳态和重塑过程中上皮完整性的维持。
The epithelial cadherin (E-cadherin)–catenin complex binds to cytoskeletal components and regulatory and signaling molecules to form a mature adherens junction (AJ). This dynamic structure physically connects neighboring epithelial cells, couples intercellular adhesive contacts to the cytoskeleton, and helps define each cell’s apical–basal axis. Together these activities coordinate the form, polarity, and function of all cells in an epithelium. Several molecules regulate AJ formation and integrity, including Rho family GTPases and Par polarity proteins. However, only recently, with the development of live-cell imaging, has the extent to which E-cadherin is actively turned over at junctions begun to be appreciated. This turnover contributes to junction formation and to the maintenance of epithelial integrity during tissue homeostasis and remodeling.
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