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编辑转移RNAs (ACE-tRNAs) 编码为治疗性的非病毒最小DNA载体

Joseph J Porter^1,2, Wooree Ko^1,2, Emily G Sorensen¹

¹Department of Pharmacology and Physiology, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA.

bioRxiv : the preprint server for biology

|September 15, 2025

概括

毫无意义的突变会导致遗传疾病. 通过小DNA微载体传递的抗编辑tRNAs (ACE-tRNAs) 提供了一个有前途的治疗方法,与其他方法相比,显示出改善的传递和减少的免疫反应.

科学领域:

遗传学遗传学是一个
分子生物学分子生物学
治疗方法治疗方法

背景情况:

无意义突变是由过早终止子 (PTC) 引起的,约占导致遗传疾病的突变的11%.
无稽之谈抑制器抗编辑tRNAs (ACE-tRNAs) 是纠正PTCs的一种治疗策略.
目前使用病毒载体或RNA-脂质纳米粒子的ACE-tRNA输送方法存在缺点.

研究的目的:

评估基于DNA的ACE-tRNAs用于无意义突变抑制的有效性.
为了研究小DNA迷你载体在ACE-tRNA传递中的潜力.
为了比较ACE-tRNA微载体与常规等离子体DNA载体的性能.

主要方法:

开发和测试直线DNAACE-tRNA微载体,其最小值为200个基对 (bp).
评估ACE-tRNA迷你载体在抑制CFTR和REP1基因无意义突变中的有效性.
评估ACE-tRNA迷你载体的生物可用性,先天免疫反应和生物稳定性.

主要成果:

线性DNA ACE-tRNA 迷你载体有效抑制了CFTR和REP1中的无意义突变.
与等离子体DNA载体相比,ACE-tRNA微载体显著改善了生物可用性.
迷你载体表现出降低天生的免疫负担和优越的生物稳定性.

结论:

小型DNA微载体是传递ACE-tRNA的可行和有效方法.
在生物可用性,安全性和稳定性方面,ACE-tRNA微载体比传统的DNA输送方法具有优势.
这种方法有可能治疗由无意义突变引起的遗传疾病.

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