RNAi-based functional selection identifies novel cell migration determinants dependent on PI3K and AKT pathways.

RNAi-based functional selection identifies novel cell migration determinants dependent on PI3K and AKT pathways.
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DOI:
10.1038/ncomms6217
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发表时间:
2014-10-28
影响因子:
16.6
通讯作者:
Suk K
Suk K
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Seo M;Lee S;Kim JH;Lee WH;Hu G;Elledge SJ;Suk K

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慢病毒短发夹状RNA(ShRNA)介导的遗传筛选是鉴定哺乳动物细胞功能丧失表型的有力工具。在这里,我们报告了使用无偏全基因组功能性遗传选择来鉴定91个细胞迁移调节基因。10个候选基因的单独敲除或过表达表明,这些细胞迁移决定因素大多强烈依赖于PI3K/PTEN/AKT途径及其下游信号,如FOXO1和p70S6K1。Alk是一种细胞迁移促进基因,它独特地利用PI3K的P55γ调节亚基而不是更常见的P85亚基来触发PI3K-Akt通路的激活。我们的方法能够在全基因组范围内快速且经济高效地选择细胞迁移调节因子。我们的结果强调了PI3K/PTEN/AKT通路作为多个细胞迁移调节因子的聚合点的重要性。
Lentiviral short hairpin RNA (shRNA)-mediated genetic screening is a powerful tool for identifying loss-of-function phenotype in mammalian cells. Here, we report the identification of 91 cell migration-regulating genes using unbiased genome-wide functional genetic selection. Individual knockdown or cDNA overexpression of a set of 10 candidates reveals that most of these cell migration determinants are strongly dependent on PI3K/PTEN/AKT pathway and on their downstream signals, such as FOXO1 and p70S6K1. ALK, one of the cell migration promoting genes, uniquely uses p55γ regulatory subunit of PI3K, rather than more common p85 subunit, to trigger the activation of PI3K-AKT pathway. Our method enables the rapid and cost-effective genome-wide selection of cell migration regulators. Our results emphasize the importance of the PI3K/PTEN/AKT pathway as a point of convergence for multiple regulators of cell migration.
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