Cell Chem Biol:科学家成功利用模拟进化的方法来治疗癌症

2017-03-08 生物谷 生物谷

最近,一项刊登于国际杂志Cell Chemical Biology上的研究报告中,来自维多利亚大学等机构的研究人员通过研究开发了一种新型的化疗方法来专门靶向作用癌细胞。这种化疗方法是一种具有高度靶向性的方法,其能够对癌症患者进行有效治疗,同时副作用还较小。 研究者David Ackerley教

图片来源:medicalxpress.com

-最近,一项刊登于国际杂志Cell Chemical Biology上的研究报告中,来自维多利亚大学等机构的研究人员通过研究开发了一种新型的化疗方法来专门靶向作用癌细胞。这种化疗方法是一种具有高度靶向性的方法,其能够对癌症患者进行有效治疗,同时副作用还较小。

研究者David Ackerley教授表示,我们通过对一种酶类进行工程化操作,使其能够将一种相对安全且无毒性的化合物(前体药物,pro-drug)转化成为对癌细胞具有较高毒性的药物,同时利用仅能够在肿瘤细胞中复制的病毒或细菌,我们就能够将编码这些酶类的基因成功运输到癌细胞中发挥作用。

这种前体药物名为PR-104A,研究者表示,最开始使用的酶类对PR-104A作用活性较轻,然而自然界并不会让酶类自然进化来识别这些人工类型的分子;通过在实验室中模拟进化,即将随机突变引入到编码靶向酶类的基因中,随后选择一些能够改善酶类活性的少数的突变体,这样研究人员就能够获得一种专门的酶类来更加有效地靶向作用PR-104A。

研究人员利用人工进化的酶类不仅能够更好地激活活细胞中的PR-104A,还能够解决另外一个主要问题,那就是如何追踪患者机体中的微生物以确保其仅仅能够感染癌细胞。本文研究的一个独特之处就在于,这些酶类能够捕捉名为正电子发射成像探针(PET探针)的放射性分子,研究者希望这能够帮助临床研究人员对患者进行全身的PET扫描来安全地鉴别出微生物所复制的机体区域。

相关研究由多个新西兰资助机构提供资助,未来研究中,研究者Patterson希望能够利用Ackerley教授的酶类开发出更具效力的前体药物;如今研究人员正在同来自诺丁汉大学以及马斯特里赫特大学的研究人员开展合作,目的在于将本文中所开发出的疗法推向对癌症患者的临床试验中去。

原始出处:

Janine N. Copp, Alexandra M. Mowday, Elsie M. Williams, et al. Engineering a Multifunctional Nitroreductase for Improved Activation of Prodrugs and PET Probes for Cancer Gene Therapy. Cell Chemical Biology, 2017, doi:10.1016/j.chembiol.2017.02.005

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    2017-06-04 sunylz
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    2017-11-25 维他命
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    2017-03-09 明天会更好!

    学习了!

    0