相关实验视频

Updated: Sep 16, 2025

Testing the In Vitro and In Vivo Efficiency of mRNA-Lipid Nanoparticles Formulated by Microfluidic Mixing

Testing the In Vitro and In Vivo Efficiency of mRNA-Lipid Nanoparticles Formulated by Microfluidic Mixing

Published on: January 20, 2023

脂质和聚合纳米颗粒在mRNA模式中的不同传递和表达动力学

Irafasha C Casmil^1,2, Josh J Friesen^1,2, Nuthan V Bathula^1,2

¹Michael Smith Laboratories, University of British Columbia, Vancouver, V6T 1Z4, Canada.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|July 12, 2025

概括

与线性mRNA (linRNA) 和圆形RNA (circRNA) 相比,自我放大RNA (saRNA) 显示出更高的功效. 像脂质纳米颗粒 (LNP) 和pABOL这样的输送系统显著影响治疗性蛋白质表达.

科学领域:

生物技术是生物技术.
分子生物学分子生物学
药物输送系统药物输送系统

背景情况:

使者核糖核酸 (mRNA) 疗法正在超越疫苗接种,用于诸如蛋白质替代和再生医学等应用.
不同的mRNA结构 (线性,圆形,自我放大) 和传递方法相互作用,影响治疗结果.
非病毒传递系统,包括脂质纳米颗粒 (LNP) 和像pABOL这样的聚合物,对于mRNA疗效至关重要.

研究的目的:

系统地评估线性mRNA (linRNA),循环RNA (circRNA) 和自我放大RNA (saRNA) 的体内表达动力学.
为了比较两个不同的非病毒传递系统的疗效:脂质纳米颗粒 (LNP) 和生物可降解聚合物 (pABOL).
阐明mRNA模式,saRNA基因型和输送平台如何共同影响治疗性蛋白质生产.

主要方法:

通过LNP和pABOL传递的linRNA,circRNA和saRNA的体内表达分析.
对不同类型的mRNA进行剂量依赖的光酶表达的比较.
来自新世界和旧世界α病毒的saRNA表达的比较分析.

主要成果:

基于委内瑞拉马类脑炎病毒 (VEEV) 的saRNA在较低剂量下显示出比linRNA和circRNA更高的功效.
与paBOL相比,LNP增强了非放大mRNA的表达.
与LNP相比,pABOL输送的saRNA的表达量大约是LNP的两倍.
新世界saRNAs与旧世界saRNAs相比,LNP的蛋白质表达显著更高,这种差异在pABOL中没有看到.

结论:

基于mRNA的疗法的治疗性蛋白质输出是mRNA结构,saRNA遗传起源和所选择的输送平台之间的复杂相互作用.
优化mRNA模式和输送系统对于最大限度地提高治疗疗效至关重要.
这些发现为各种临床应用的mRNA疗法的合理设计提供了宝贵的见解.

关键词:

这是一个圆形的mRNA.表达方式表达方式表达方式表达这是一个线性mRNA.脂质纳米颗粒是一种纳米粒子.帕博尔 (Pabol) 是一个著名的作家.自强化的mRNA.

更多相关视频

Using Lipid Nanoparticles for the Delivery of Chemically Modified mRNA into Mammalian Cells

Using Lipid Nanoparticles for the Delivery of Chemically Modified mRNA into Mammalian Cells

Published on: June 10, 2022

Author Spotlight: Enhancing Lipid Nanoparticle Formation Through Turbulent Mixing in Confined Geometries

Author Spotlight: Enhancing Lipid Nanoparticle Formation Through Turbulent Mixing in Confined Geometries

Published on: August 23, 2024

相关概念视频

mRNA Stability and Gene Expression

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

Regulated mRNA Transport

Regulated mRNA Transport

Regulation of Expression at Multiple Steps

Regulation of Expression at Multiple Steps

The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...

Regulation of Expression Occurs at Multiple Steps

Regulation of Expression Occurs at Multiple Steps

Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...