增强的ASO介导基因沉默与脂性pH响应小胞体
Christian J Grimme1, Mckenna G Hanson2, Theresa M Reineke2
1Department of Chemical Engineering & Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States.
Bioconjugate chemistry
|June 29, 2023
概括
含有2- ((diisopropylamino) 乙基甲酸盐 (DIP) 增强的反感性寡核酸 (ASO) 基因沉默的响应pH的微粒. 通过更长的基链在DIP-细胞中的更高的脂性,显著提高了ASO传递和基因沉默效率.
科学领域:
- 生物技术是生物技术.
- 聚合物化学 聚合物化学
- 基因治疗 基因治疗
背景情况:
- 反感性寡核酸 (ASO) 输送仍然是基因治疗中的一个挑战.
- 聚合物微粒为核酸输送提供了一个有前途的平台.
- 了解微粒特性对ASO疗效的影响至关重要.
研究的目的:
- 为了研究pH响应性微粒的基因沉默效率.
- 为了评估细胞核心脂性对ASO输送的影响.
- 为了比较pH响应的和非pH响应的对应物.
主要方法:
- 合成的响应pH的微粒,其中包含2 - 二胺基乙烯基甲酸盐 (DIP).
- 通过调整基单体链长度 (丁基,基,基) 来改变微粒核心的脂性.
- 评估ASO介导的基因沉默效率和细胞毒性.
主要成果:
- 具有较长基链 (DIP+LMA,DIP+SMA) 的pH响应性微粒实现了~90%的基因沉默.
- 这些优化细胞的疗效与商业传染剂 (Jet-PEI,Lipofectamine 2000) 相同,毒性较低.
- 为了有效的基因沉默,需要最小的基链长度,而DIP单元对于更长的链条至关重要.
结论:
- 聚合物微粒,特别是具有最佳化脂性pH响应的聚合物微粒,对于ASO介导的基因沉默非常有效.
- 对pH响应度和适当的脂性质的结合是提高ASO输送和治疗结果的关键.
- 这项研究为基因治疗应用的聚合物微粒的合理设计提供了宝贵的见解.
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