相关实验视频

Updated: Jul 26, 2025

Generation of Cationic Nanoliposomes for the Efficient Delivery of In Vitro Transcribed Messenger RNA

Generation of Cationic Nanoliposomes for the Efficient Delivery of In Vitro Transcribed Messenger RNA

Published on: February 1, 2019

具有超分子化学特征的可电离性脂质,用于在体内进行RNA输送

Alanna M Manning¹, Grayson Tilstra¹, Aniqa B Khan²

¹Institute of Biomedical Engineering, University of Toronto, 164 College Street, Toronto, ON, M5S 3G9, Canada.

Small (Weinheim an der Bergstrasse, Germany)

|June 14, 2023

概括

研究人员开发了一种新型的可电离性脂质,C3-K2-E14,用于创建稳定的脂质纳米粒子 (LNP). 这些LNP有效地输送RNA (核糖核酸) 用于潜在的长期疾病治疗,具有良好的耐受性.

科学领域:

超分子化学超分子化学
纳米技术纳米技术
对于RNA疗法来说,它是非常重要的.

背景情况:

脂质纳米粒子 (LNP) 和RNA技术对于诊断和治疗至关重要.
新型电离性脂质的合理设计对于有效的全身管理至关重要.

研究的目的:

设计和表征一种新的可离子化脂质,C3-K2-E14,用于增强RNA输送.
评估基于C3-K2-E14的LNP的稳定性,安全性和有效性,用于潜在的治疗应用.

主要方法:

将高分子化学原理纳入脂质设计 (C3-K2-E14).
优化信使RNA (mRNA) 和小干扰RNA (siRNA) 的配方条件.
描述LNP的物理化学特性 (直径,PDI,封装效率) 和在各种储存条件下的稳定性.
在体内评估LNP耐受性,RNA有效载荷传递和基因沉默功效.

主要成果:

优化的LNP表现出有利的直径 (<150nm),PDI (<0.15) 和高RNA封装 (>90%).
液态核聚物表现出极好的稳定性,在4°C或37°C保存2个月后保持性能.
配制的LNP在动物中耐受良好,没有表现出任何不良影响.
在体内研究证实了成功的RNA传递和基因沉默 (CSF-1 siRNA) 通过调节白细胞群.

结论:

新型的电离性脂质C3-K2-E14能够创建稳定有效的LNP用于RNA输送.
这些LNP显示出在慢性疾病中长期治疗应用的前景.
这项研究强调了合理设计的脂质在推进基于RNA的疗法中的实用性.

关键词:

在CSF-1中使用CSF-1.基因表达的基因表达方式基因沉默是对基因进行沉默的方法.可离子化脂质是可以离子化的脂质.脂质纳米颗粒的使用方法核糖核酸是核糖核酸中的一种.超分子化学超分子化学热稳定性热稳定性

更多相关视频

Formulating and Characterizing Lipid Nanoparticles for Gene Delivery using a Microfluidic Mixing Platform

Formulating and Characterizing Lipid Nanoparticles for Gene Delivery using a Microfluidic Mixing Platform

Published on: February 25, 2021

Long-term Silencing of Intersectin-1s in Mouse Lungs by Repeated Delivery of a Specific siRNA via Cationic Liposomes. Evaluation of Knockdown Effects by Electron Microscopy

Long-term Silencing of Intersectin-1s in Mouse Lungs by Repeated Delivery of a Specific siRNA via Cationic Liposomes. Evaluation of Knockdown Effects by Electron Microscopy

Published on: June 21, 2013

相关概念视频

Experimental RNAi

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...

RNA Interference

RNA Interference

RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...

Nucleic Acid Structure

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...

siRNA - Small Interfering RNAs

siRNA - Small Interfering RNAs

Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...

RNA Stability

RNA Stability

Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...

RNA Structure

RNA Structure

Overview
The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...