Self-assembled RNA-triple-helix hydrogel scaffold for microRNA modulation in the tumour microenvironment.

Self-assembled RNA-triple-helix hydrogel scaffold for microRNA modulation in the tumour microenvironment.
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DOI:
10.1038/nmat4497
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发表时间:
2016-03
期刊:
影响因子:
41.2
通讯作者:
Artzi N
Artzi N
中科院分区:
材料科学1区
文献类型:
--
作者:
Conde J;Oliva N;Atilano M;Song HS;Artzi N

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由于缺乏有效的递送载体,miRNA(MiR)在癌症中的治疗潜力受到限制。在这里,我们展示了一个自组装的双色RNA-三螺旋结构,由两个miRNA组成-一个miR模拟(肿瘤抑制因子miRNA)和一个antagomiR(肿瘤抑制因子)-提供了协同抗肿瘤的出色能力。RNA三螺旋与树枝状大分子的结合可以形成稳定的三链纳米颗粒,当与葡聚糖醛相互作用时,形成RNA-三螺旋粘附性支架,后者能够与肿瘤中的天然组织胺进行化学相互作用并附着。我们还表明,自组装的RNA-三螺旋偶联物在体外和体内仍然具有功能,并且在三阴性乳腺癌小鼠模型中,它们导致凝胶植入两周后肿瘤缩小近90%。我们的发现表明,RNA-三螺旋水凝胶可以作为一种有效的抗癌平台来局部调节肿瘤内源性miRs的表达。
The therapeutic potential of miRNA (miR) in cancer is limited by the lack of efficient delivery vehicles. Here, we show that a self-assembled dual-colour RNA-triple-helix structure comprising two miRNAs—a miR mimic (tumour suppressor miRNA) and an antagomiR (oncomiR inhibitor)—provides outstanding capability to synergistically abrogate tumours. Conjugation of RNA triple helices to dendrimers allows the formation of stable triplex nanoparticles, which form an RNA-triple-helix adhesive scaffold upon interaction with dextran aldehyde, the latter able to chemically interact and adhere to natural tissue amines in the tumour. We also show that the self-assembled RNA-triple-helix conjugates remain functional in vitro and in vivo, and that they lead to nearly 90% levels of tumour shrinkage two weeks post-gel implantation in a triple-negative breast cancer mouse model. Our findings suggest that the RNA-triple-helix hydrogels can be used as an efficient anticancer platform to locally modulate the expression of endogenous miRs in cancer.
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