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通过使用部分中和的酸甲基化DNA寡核酸载的中孔性二氧化纳米颗粒进行细胞内miRNA的特定和有效的淘汰

Yi-Jung Sung¹, Wei-Ting Cai¹, Yi-Ping Chen²

¹Department of Chemical and Materials Engineering, National Central University, Taoyuan 320, Taiwan.

Journal of materials chemistry. B

|June 14, 2024

概括

中和DNA (nDNA) 反感寡核酸 (ASO) 显示为基因治疗的前景. nDNA通过向microRNA有效调节基因表达,为癌症治疗提供了一种新方法.

科学领域:

生物化学生物化学
分子生物学分子生物学
基因治疗基因治疗

背景情况:

反感性寡核酸 (ASO) 通过向特定的RNA序列来调节基因表达.
中和DNA (nDNA),一种ASO,具有甲基三 (MPTE) 连接,改变其电荷和特性.
对于细胞内RNA调节和基因疗法的nDNA的治疗潜力在很大程度上尚未被探索.

研究的目的:

为了评估nDNA作为反意义寡核酸 (ASO) 探针的基因调节能力.
研究nDNA在调节细胞内微RNA和下游mRNA水平方面的疗效.
评估nDNA在基因治疗中的应用潜力,特别是在癌症治疗中.

主要方法:

合成的部分和中间甲基化nDNA与特定站点的MPTE链接.
将装载的nDNA放入半孔纳米颗粒 (MSN) 上,用于细胞传递.
在HCT116结直肠癌细胞中评估了细胞内miRNA敲除和随后的mRNA调节.
将nDNA载入的MSN与正规DNAASO载入的MSN在降低miR-21水平方面的有效性进行比较.

主要成果:

在72小时内,nDNA载荷的MSN有效地降低了HCT116细胞中的细胞内miR-21水平.
与正规DNAASOs相比,nDNA在miR-21敲击中表现出更高的有效性.
观察到的miR-21的减少导致瘤抑制基因PTEN和PDCD4.4的mRNA水平增加.
在nDNA中调整MPTE位置允许对基因表达进行微调调节.

结论:

作为一种用于基因调节的新型反感性寡核酸,nDNA具有显著的潜力.
载有nDNA的MSN提供了有效的传递系统,以实现目标基因淘汰.
这项研究强调了nDNA在开发先进基因疗法的前景,特别是通过精确的甲基化控制来治疗癌症.

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