Basolateral BMP signaling in polarized epithelial cells.

Basolateral BMP signaling in polarized epithelial cells.
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DOI:
10.1371/journal.pone.0062659
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Miyazawa K
Miyazawa K
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Saitoh M;Shirakihara T;Fukasawa A;Horiguchi K;Sakamoto K;Sugiya H;Beppu H;Fujita Y;Morita I;Miyazono K;Miyazawa K

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骨形态发生蛋白(BMPs)调节多种生物学过程,主要由间充质来源的细胞介导。然而,BMPs在上皮细胞中的作用还知之甚少。在这里,我们证明,在极化的上皮细胞中,BMP信号是通过BMP受体复合体传递的,BMP受体专门定位于细胞膜的基底外侧表面。此外,基侧刺激骨形态发生蛋白可增加紧密连接成分的表达,增强跨上皮细胞阻力(TER),这可抵消转化生长因子-β或抗肿瘤药物对TER的抑制作用。我们得出结论,BMP通过基底面定位的BMP受体的细胞内信号维持上皮极性。
Bone morphogenetic proteins (BMPs) regulate various biological processes, mostly mediated by cells of mesenchymal origin. However, the roles of BMPs in epithelial cells are poorly understood. Here, we demonstrate that, in polarized epithelial cells, BMP signals are transmitted from BMP receptor complexes exclusively localized at the basolateral surface of the cell membrane. In addition, basolateral stimulation with BMP increased expression of components of tight junctions and enhanced the transepithelial resistance (TER), counteracting reduction of TER by treatment with TGF-β or an anti-tumor drug. We conclude that BMPs maintain epithelial polarity via intracellular signaling from basolaterally localized BMP receptors.
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