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大家看看这篇文章吧 5 Y6 f; B, j# P9 R( Y
Mouse Fibroblasts Lacking RB1 Function Form Spheres and Undergo Reprogramming to a Cancer Stem Cell Phenotype
5 ]) ?6 o6 k0 Q7 p: ]Summary
3 m# ?6 w6 c: o( Z9 `% ]4 FActivation of the RB1 pathway triggers the cell-cycle arrest that mediates cell-cell contact inhibition. Accordingly, mutation of all three RB1 family members leads to loss of contact inhibition and outgrowth of fibroblasts into spheres where cell-cell contacts predominate. We present evidence that such outgrowth triggers reprogramming to generate cells with properties of cancer stem cells. Fibroblasts with only a single RB1 mutation remain contact inhibited; however, if this contact inhibition is bypassed by forcing the RB1/ cells to form spheres in suspension, cells with properties of cancer stem cells are also generated. These cells not only form tumors in nude mice but also generate differentiated cells. We propose that contact inhibition imposed by the RB1 pathway performs an unexpected tumor suppressor function by preventing cell outgrowth into structures where cells with properties of cancer stem cells can be generated from differentiated somatic cells in advancing cancers.
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! D3 L: B1 \2 Y4 _/ s这篇文章的思路跟ips差不多 ips技术表明通过在体细胞内过表达某些基因可以把体细胞重编程为干细胞,而这篇文章则提示通过降低某种基因的表达可以把普通细胞转化为类似于肿瘤干细胞性质的细胞~ 有兴趣的可以阅读一下1 o& [' k& ~# _2 H: }0 _. v. B
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