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用O替代的三级氨基基基托桑作为siRNA传递的有希望的纳米载体

André Miguel Martinez Júnior¹, Vera Aparecida de Oliveira¹, Marcio José Tiera¹

¹Department of Chemistry and Environmental Sciences, IBILCE, São Paulo State University - UNESP, São José do Rio Preto, São Paulo, Brazil.

Current gene therapy

|January 15, 2025

概括

改性奇托 (O-DIPEA-奇托) 通过提高溶解性和稳定性来增强siRNA输送. 这种新型纳米载体有效地降低了巨细胞中的瘤亡因子α (TNFα),显示了基因治疗应用的前景.

科学领域:

生物材料科学生物材料科学
基因治疗基因治疗
纳米技术纳米技术

背景情况:

用于siRNA输送的基托桑配方在生理条件下面临着稳定性和溶解性的挑战.
尽管有这些局限性,但酸盐具有良好的生物相容性和成本效益.

研究的目的:

开发一种基于酸盐的新型纳米载体,以增强siRNA传递.
为了改善siRNA加载的奇托的溶解性和稳定性.

主要方法:

基托桑被O替换为二醇乙烯胺 (DIPEA) 组.
形成了O-DIPEA-chitosan/siRNA纳米复合体,并以物理化学性质 (大小,PDI,Zeta潜力) 为特征.
评估了细胞毒性,细胞吸收和RNAase/albumin稳定性.

主要成果:

在pH 7.4下,O-DIPEA-奇托桑的溶解性得到了改善,在低N/P比率下,siRNA的有效负载得到了改善.
纳米聚合体表现出有利的特征:积极的Zeta潜力,200-300纳米大小,低的PDI,以及良好的结构/合体稳定性.
观察到低细胞毒性和高细胞吸收效率,与Lipofectamine可比.

结论:

O-DIPEA-基托桑纳米载体是稳定的,并有效地将siRNA输入细胞.
通过使用O-DIPEA-chitosan/siTNFα纳米复合体,在巨细胞中实现了TNFα的显著淘汰 (60-70%).
在治疗应用中,O-DIPEA 基托代表了siRNA输送的有希望的载体.

关键词:

基因治疗是一种基因疗法.基托桑衍生物. 基托桑衍生物.这是一种diisopropylethylamine.非病毒载体的非病毒载体核酸是核酸中的一种.聚合物纳米载体的聚合物纳米载体

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