Cell Rep:细胞重编程重要信号分子—WNT蛋白

2014-11-25 佚名 生物谷

近日,刊登在国际杂志Cell Reports上的一篇研究论文中,来自加利福尼亚大学的研究人员在对罕见遗传病研究时发现了一种对细胞重编程非常关键的信号分子,该研究为开发基于干细胞的再生医学疗法用来进行组织损伤修复及癌症治疗带来了新的思路和希望。 文章中,研究者Karl Willert及其同事利用诱导多能干细胞(iPSC)为治疗局灶性皮肤发育不全(FDH)开发了一种“培养皿”模型,FDH是一种P

近日,刊登在国际杂志Cell Reports上的一篇研究论文中,来自加利福尼亚大学的研究人员在对罕见遗传病研究时发现了一种对细胞重编程非常关键的信号分子,该研究为开发基于干细胞的再生医学疗法用来进行组织损伤修复及癌症治疗带来了新的思路和希望。

文章中,研究者Karl Willert及其同事利用诱导多能干细胞(iPSC)为治疗局灶性皮肤发育不全(FDH)开发了一种“培养皿”模型,FDH是一种PORCN基因突变引发的罕见疾病,该疾病的主要特点为皮肤畸形,比如皮肤条纹很薄或者有不同的形状及可见的静脉集群现象等。

文章中,研究者发现,当加入WNT蛋白时,就可以将FDH成纤维细胞或皮肤细胞成功地重编程为诱导多能干细胞,WNT蛋白是一种保守的信号分子,其可以在胚胎发育期间调节细胞间的相互作用。Willert表示,WNT信号到处都是,每一个细胞都可以表达一种乃至多种WNT基因,而且每个细胞都能够接收WNT信号。WNT信号对于某些生物的肢体再生及组织修复非常关键。

本文中研究者发现WNT信号是细胞重编程所必需的,因此其对于未来再生医学的开发也具有非常大的潜力;WNT信号的激活将可以帮助实现肢体的再生,而当前研究人员投入的很多努力都是为揭示如何利用WNT信号来促进机体的伤口愈合、比如加速骨折的修复,甚至是毛发的再生,这并不仅仅是一个伤口修复的过程,其中所涉及的分子机制都是有待于进一步去深入研究和剖析的。

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。

原始出处

Jason Ross, Julia Busch, Ellen Mintz, Damian Ng, Alexandra Stanley, David Brafman, V. Reid Sutton, Ignatia Van den Veyver, Karl Willert.A Rare Human Syndrome Provides Genetic Evidence that WNT Signaling Is Required for Reprogramming of Fibroblasts to Induced Pluripotent Stem Cells .Cell Rep.2014

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    2015-05-07 维他命
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    2014-11-27 zhwj

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