化脂质纳米粒子用于提高mRNA传递效率
Huipeng Zhang1,2, Chaoyang Meng3, Xuewen Yi3
1National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China.
ACS nano
|March 7, 2024
概括
脂质纳米颗粒 (LNP) 的化修饰增强了信使RNA (mRNA) 的传递和表达. 这种新型的FPD修饰改进了细胞吸收和内体逃逸,提高了治疗潜力,并具有良好的安全性.
科学领域:
- 生物技术是生物技术.
- 纳米医学是一种纳米医学.
- 药物运输 药物运输 药物运输
背景情况:
- 脂质纳米粒子 (LNP) 是核酸输送的有希望的非病毒载体,对疫苗和治疗应用至关重要.
- 目前的LNP面临内体逃脱效率和生物安全性的局限性,阻碍信使RNA (mRNA) 传递效率.
- 提高LNP性能对于最大限度地发挥mRNA治疗的治疗潜力至关重要.
研究的目的:
- 调查化修饰PEG-DSPE (FPD) 对LNP介导的mRNA递送的影响.
- 评估FPD修饰的LNP在增强细胞吸收和内体逃逸方面的效率.
- 评估fpd修饰的lnps在体内有效性和生物安全性,用于mRNA输送.
主要方法:
- 化脂质纳米粒子 (FPD-LNPs) 的合成和表征.
- 在体外评估B16F10瘤细胞和初级树突细胞中的mRNA表达.
- 在动物模型中通过静脉和腹腔内注射对mRNA表达的体内评估.
- 对LNP细胞内化和内体逃生机制的分析.
主要成果:
- 经FPD修饰的LNP显示,mRNA表达在瘤细胞和树突细胞中分别增加了5倍和2倍.
- 在体内研究显示,与非化LNP相比,总体mRNA表达至少增加了3倍.
- 与商业DMG-PEG配方相比,FPD的引入导致了脏中mRNA表达的增加.
- 化LNP在细胞和生物水平上表现出有利的生物安全性.
结论:
- 化修改PEG-DSPE (FPD) 显著提高了LNP介导的mRNA递送效率和表达.
- FPD促进细胞内化和内体逃逸,解决当前LNP技术的关键局限性.
- 开发的化LNP提供了改善的体内疗效,并保持了有利的安全性,推进了基于mRNA的治疗方法.
相关概念视频
mRNA Stability and Gene Expression
The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
Cis-acting Elements involved in mRNA stability
Experimental RNAi
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
mRNA Stability and Gene Expression
The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
Cis-acting Elements involved in mRNA stability
MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
Nucleic Acid Structure
The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms a 5′ to 3′ phosphodiester linkage.
DNA Structure
DNA has a double-helix structure. The...
DNA Structure
DNA has a double-helix structure. The...


