内囊泡作为传染中间体
Nourhan A M Mahmoud1,2, Hadeer K S Abdelrahman1,2, Benedita K L Feron1,3
1The Exogenix Laboratory, School of Science, University of Greenwich, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK.
Pharmaceutics
|December 31, 2025
概括
减弱的炭毒素 (aATx) 通过内囊泡 (ILV) 促进了通过小干扰RNA (siRNA) 的增强细胞质传递,改善了基因沉默. 抑制ILVs显著减少aATx介导的siRNA转位和基因淘汰.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 生物技术是生物技术.
背景情况:
- 基于蛋白质架构的转染系统被探索,以管理肝分布和毒性.
- 减弱的炭病毒素 (aATx) 作为一种新型传染系统的支架,利用内囊泡 (ILV) 进行细胞溶液输送.
- 附在LFn-PKR上的小干扰RNA (siRNA) 并不是aATx转位酶 (保护性抗原 (PA)) 的预测基质.
研究的目的:
- 量化aATx传递的siRNA的细胞内定位,并将其与基因沉默活性相关联.
- 调查ILVs在siRNA的ATx介导细胞突变中的作用.
- 与传统的转染方法相比,评估基于aATx的siRNA输送的有效性.
主要方法:
- 放射性 (32P标记) siRNA被用于跟踪与aATx在MCF-7细胞中转移后的细胞内分布.
- 基因沉默的有效性是通过西方分析来准STAT3基因表达来衡量的.
- 使用高糖或小麦胚芽聚合素 (WGA) 抑制ILV形成,研究其对siRNA转位的影响.
主要成果:
- aATx介导的转染导致细胞关联siRNA在细胞质中的77%±2.5%,与Lipofectamine的45%±3.2%相比.
- aATx的输送导致了STAT3表达的显著减少 (64.04% ± 14.17%).
- 通过WGA (75.23% ± 0.06%) 或砂糖 (74.58% ± 7.76%) 抑制ILV形成显著减少了STAT3基因敲击.
结论:
- 保护性抗原 (PA) 孔插入内体膜不会损害膜完整性,防止囊泡破裂.
- 内囊泡 (ILV) 在aATx系统的转位酶活性中发挥着关键作用.
- aATx系统证明了siRNA的有效细胞溶液传递,导致有效的基因沉默,ILVs对于这一过程至关重要.
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