Tricellulin constitutes a novel barrier at tricellular contacts of epithelial cells.

Tricellulin constitutes a novel barrier at tricellular contacts of epithelial cells.
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DOI:
10.1083/jcb.200510043
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发表时间:
2005-12-19
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Tsukita S
Tsukita S
中科院分区:
其他
文献类型:
--
作者:
Ikenouchi J;Furuse M;Furuse K;Sasaki H;Tsukita S;Tsukita S

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为了让上皮起到屏障的作用,细胞间隙必须是封闭的。Claudins的发现很好地描述了在双细胞紧密连接(BTJ)处封闭两个相邻细胞的过程。然而,在三细胞接触处仍然存在屏障弱点,在那里三个细胞连接在一起。在这项研究中,我们鉴定了三细胞蛋白,这是第一种完整的膜蛋白,集中在三细胞接触的垂直方向的TJ链上。当三细胞蛋白的表达被RNA干扰抑制时,上皮屏障被破坏,三细胞接触和bTJ被破坏。这些发现表明毛细胞蛋白在形成上皮屏障中起着关键作用。
For epithelia to function as barriers, the intercellular space must be sealed. Sealing two adjacent cells at bicellular tight junctions (bTJs) is well described with the discovery of the claudins. Yet, there are still barrier weak points at tricellular contacts, where three cells join together. In this study, we identify tricellulin, the first integral membrane protein that is concentrated at the vertically oriented TJ strands of tricellular contacts. When tricellulin expression was suppressed with RNA interference, the epithelial barrier was compromised, and tricellular contacts and bTJs were disorganized. These findings indicate the critical function of tricellulin for formation of the epithelial barrier.
DOI: 10.1242/jcs.00389
发表时间: 2003-05-15
影响因子: 4
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