Co-regulation of cell polarization and migration by caveolar proteins PTRF/Cavin-1 and caveolin-1.

Co-regulation of cell polarization and migration by caveolar proteins PTRF/Cavin-1 and caveolin-1.
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DOI:
10.1371/journal.pone.0043041
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Parton RG
Parton RG
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Hill MM;Daud NH;Aung CS;Loo D;Martin S;Murphy S;Black DM;Barry R;Simpson F;Liu L;Pilch PF;Hancock JF;Parat MO;Parton RG

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Caveolin-1 和 Caveolae 在各种模型中的迁移细胞中具有不同的极化,并且 Caveolin-1 的表达已被证明可以定量调节细胞迁移。 PTRF/cavin-1 是一种细胞质蛋白,现已确定对于小窝形成也是必需的。在这里我们测试了 PTRF 表达对细胞迁移的影响。使用荧光成像、定量蛋白质组学和细胞迁移测定,我们表明 PTRF/cavin-1 调节细胞极化、迁移细胞中 Rac1 和 Caveolin-1 的亚细胞定位以及 PKCα Caveola 募集。 PTRF/cavin-1 定量减少细胞迁移,并诱导间充质上皮回复。与 Caveolin-1 类似,PTRF/cavin-1 的极化取决于迁移模式。通过选择性地操纵多个细胞系统中的 PTRF/cavin-1 和 Caveolin-1 表达(以及因此形成的小窝形成),我们揭示了这两种蛋白在细胞迁移中的独立于小窝的功能。
Caveolin-1 and caveolae are differentially polarized in migrating cells in various models, and caveolin-1 expression has been shown to quantitatively modulate cell migration. PTRF/cavin-1 is a cytoplasmic protein now established to be also necessary for caveola formation. Here we tested the effect of PTRF expression on cell migration. Using fluorescence imaging, quantitative proteomics, and cell migration assays we show that PTRF/cavin-1 modulates cellular polarization, and the subcellular localization of Rac1 and caveolin-1 in migrating cells as well as PKCα caveola recruitment. PTRF/cavin-1 quantitatively reduced cell migration, and induced mesenchymal epithelial reversion. Similar to caveolin-1, the polarization of PTRF/cavin-1 was dependent on the migration mode. By selectively manipulating PTRF/cavin-1 and caveolin-1 expression (and therefore caveola formation) in multiple cell systems, we unveil caveola-independent functions for both proteins in cell migration.
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