0 I4 v% N2 w3 g. O! Q; d; B4 M R最后研究者指出,组织修复和促进癌症生长之间仅一步之遥,通过阻断WNT信号开发新型靶向疗法就可以抑制癌症的发展,而在早些年里,研究者曾在文章中描述了如何利用抗体来干扰胚胎干细胞中的WNT信号;在突变癌细胞中的WNT信号通路中,利用特殊抗体的疗法或许也可以抑制癌细胞的生长和发育。 * O, H+ @! B) C/ S( K# l9 T! R6 f' _1 [, E/ a
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3楼原文 感谢wys7416 提供作者: defu 时间: 2014-11-24 20:50
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doi:10.1016/j.celrep.2014.10.049 . k; p! l2 i {' l9 e/ r, TPMC: 9 g, f: M9 e9 b0 e1 ] G+ b7 s( xPMID: ; u M& H3 D1 Q8 g! A/ A3 ] # l' M+ B. D$ v; p" v: H* U) u) s( i
A Rare Human Syndrome Provides Genetic Evidence that WNT Signaling Is Required for Reprogramming of Fibroblasts to Induced Pluripotent Stem Cells ! v" n0 b" \6 W) V$ G# T4 f% H! e( E- ^
Jason Ross, Julia Busch, Ellen Mintz, Damian Ng, Alexandra Stanley, David Brafman, V. Reid Sutton, Ignatia Van den Veyver, Karl Willert 0 e. |& ~. N' E& r3 W ! G9 l3 g/ W5 Q+ f ) G H6 Z) N- |( c) f% y$ O4 ^4 u S , s' v: V8 o6 B' kWNT signaling promotes the reprogramming of somatic cells to an induced pluripotent state. We provide genetic evidence that WNT signaling is a requisite step during the induction of pluripotency. Fibroblasts from individuals with focal dermal hypoplasia (FDH), a rare genetic syndrome caused by mutations in the essential WNT processing enzyme PORCN, fail to reprogram with standard methods. This blockade in reprogramming is overcome by ectopic WNT signaling and PORCN overexpression, thus demonstrating that WNT signaling is essential for reprogramming. The rescue of reprogramming is critically dependent on the level of WNT signaling: steady baseline activation of the WNT pathway yields karyotypically normal iPSCs, whereas daily stimulation with Wnt3a produces FDH-ipsCs with severely abnormal karyotypes. Therefore, although WNT signaling is required for cellular reprogramming, inappropriate activation of WNT signaling induces chromosomal instability, highlighting the precarious nature of ectopic WNT activation and its tight relationship with oncogenic transformation. + F: b! z/ m v& ^9 M作者: wys7416 时间: 2014-11-25 09:13