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Cell Stem Cell:科学家揭秘癌症血细胞转化机制

2016-06-14 佚名 科技世界网

加拿大和美国科研机构的遗传学家团队成功发现骨髓干细胞是如何再生形成白血病——一种血液疾病的。研究表明:RNA编码系统在病理过程中起到了重要作用。相关文章已经刊登在Cell Stem Cell杂志之上。  科学家发现:当特定基因干细胞——白细胞的前身发生突变,细胞就会变得对炎症反应更加敏感。其结果就是会激活ADAR1酶,这种物质会对RNA小分子进行重新编辑,改变腺甙——核苷酸A的主要成分。let-7

加拿大和美国科研机构的遗传学家团队成功发现骨髓干细胞是如何再生形成白血病——一种血液疾病的。研究表明:RNA编码系统在病理过程中起到了重要作用。相关文章已经刊登在Cell Stem Cell杂志之上。
  

科学家发现:当特定基因干细胞——白细胞的前身发生突变,细胞就会变得对炎症反应更加敏感。其结果就是会激活ADAR1酶,这种物质会对RNA小分子进行重新编辑,改变腺甙——核苷酸A的主要成分。let-7是微型RNA,它可以参与调节很多基因的活性,破坏它的工作会导致干细胞不受限制的增长以及肿瘤组织的再生。
  
科学家在研究中将从骨髓细胞(处于血癌发展的危险阶段)中提取的细胞微生物移植到小鼠身上,目的是确定ADAR1蛋白质在白血病干细胞发展中起到的作用。
  
遗传学家在确定ADAR1的运作机制之后研发出了一种方法:这种方法可以让细胞停止转化。通过抑制对炎症的敏感性或者结合8-Aza的作用,科学家重新恢复了let-7的活性。干细胞再生速度下降了40%。

原始出处:

Zipeto MA, Court AC, Sadarangani A,et al.ADAR1 Activation Drives Leukemia Stem Cell Self-Renewal by Impairing Let-7 Biogenesis. Cell Stem Cell. 2016 Jun 7. 


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    2016-09-09 维他命
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