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NAT GENET:癌细胞自杀开关

2017-03-21 wangzhe MedSci原创

有关人类生物学还有许多未解之谜,其中之一是,為什麼很多复杂的疾病,如糖尿病、高血压和精神疾病总是难以预先发现,有时也很难治癒。同样令人困惑的还有,為什麼同卵双胞胎其中之一患上了像癌症或抑鬱症这样的病,而另一个却安然无恙。

为什么很多复杂的疾病,如糖尿病高血压和精神疾病总是难以预先发现,有时也很难治癒。同样令人困惑的还有,为什么同卵双胞胎其中之一患上了像癌症或抑郁症这样的病,而另一个却安然无恙。 

近年来,人类发现了一个可以解开谜团的重要线索。人类基因组携带着至少400万个基因开关,这些基因开关位于曾被认為是垃圾的DNA片段上,但后来发现,它们在控制细胞、器官和其他组织的行为上起着关键作用。这一发现被认为是医学界和科学界的重大突破,对人类健康具有重大意义,很多复杂的疾病似乎就是由数百个基因开关的微小变化引起的。

此前在多种生物体中已经实现了基于RNA的感应开关并能够控制基因调节。虽然基于RNA遗传控制策略的潜在优势已经在临床应用中显示出来,但成功地将这些控制系统扩展到医疗应用中很少有报道。本研究中,实现了了人工合成的,基于RNA的核酶系统并将其应用到合理设计的细胞治疗中。茶碱敏感性的基于核酸酶的这一开关装置为肿瘤细胞中的自杀基因表达调节提供了强大的平台。此外,我们证明我们的合成控制开关能够有效地调节细胞在药物输入后的生存能力。我们基于RNA的这一开关系统能够:剂量依赖性微调转基因在哺乳动物细胞中的表达,解决了现有基因细胞的治疗的遗传控制方法的局限性。

原始出处:

Zhang Y, Wang J, Cheng H, et al. Conditional control of suicide gene expression in tumor cells with theophylline-responsive ribozyme[J]. Gene Therapy,Received 29 July 2016.doi:10.1038/gt.2016.78

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    2017-03-27 canlab
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    2017-10-01 cy0324
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    2017-04-23 liye789132251
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    2017-03-23 yxch36

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