相关实验视频

Updated: Sep 19, 2025

Optical Tweezers to Study RNA-Protein Interactions in Translation Regulation

Optical Tweezers to Study RNA-Protein Interactions in Translation Regulation

Published on: February 12, 2022

调整键和静电与对流来净化mRNA:一个范式的转变

Thomas G Neuman^1,2, Riddhi Banik^1,2, Surya Karla^1,2

¹Howard P. Isermann Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA.

Science advances

|June 18, 2025

概括

这项研究引入了一种新的,具有成本效益的方法,用于使用改性膜净化单链mRNA (ss-mRNA) 疗法. 无带方法有效地将ss-mRNA与双链RNA (dsRNA) 杂质分离,改善治疗生产.

科学领域:

生物技术是生物技术.
材料科学材料科学材料科学
在RNA治疗方面,RNA疗法.

背景情况:

单链mRNA (ss-mRNA) 疗法的临床试验正在增加,需要有效,可扩展和经济的净化方法.
目前的净化技术受到扩散,低生产率和依赖昂贵的oligo (dT) 配体的限制,以实现多 (A) 尾杂交.
免疫双链RNA (dsRNA) 是一种关键的杂质,必须从治疗性ss-mRNA中去除.

研究的目的:

为SS-mRNA疗法开发一种成本效益高,无带的净化策略.
使用界面分子力和修饰膜将ss-mRNA与dsRNA杂质分离.
通过多式联动和选择性电荷中和,提高净化效率.

主要方法:

使用带正电荷的合成微孔膜通过电荷和键捕获ss-mRNA.
研究了膜结合的优化表面密度 (4000至10,000nmol/m2) 和pH条件 (~9.0).
使用聚胺精氨酸选择性地中和dsrna电荷,在特定的氨酸与酸盐比率 (>450) 上增强分离.

主要成果:

实现了高结合能力 (1.28 mg/m2) 和高达100%的ss-mRNA恢复.
证明了快速的净化流量 (1.5毫升/分钟,1000毫升/分钟) 与膜可重复使用性 (>10个循环).
观察到可忽略不计的联结体漏,证实了该方法的无联结体性质.

结论:

多式联体无膜净化策略为当前方法提供了一种高效,可扩展和经济的替代方案.
使用精氨酸对dsRNA进行选择性电荷中和是实现高纯度ss-mRNA的关键.
这种方法显著推进了安全有效的ss-mRNA治疗方法的生产.

更多相关视频

An Oligonucleotide-based Tandem RNA Isolation Procedure to Recover Eukaryotic mRNA-Protein Complexes

An Oligonucleotide-based Tandem RNA Isolation Procedure to Recover Eukaryotic mRNA-Protein Complexes

Published on: August 18, 2018

Practical Aspects of Sample Preparation and Setup of 1H R1ρ Relaxation Dispersion Experiments of RNA

Practical Aspects of Sample Preparation and Setup of ¹H R_1ρ Relaxation Dispersion Experiments of RNA

Published on: July 9, 2021

相关概念视频

Detergent Purification of Membrane Proteins

Detergent Purification of Membrane Proteins

Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...

Improving Translational Accuracy

Improving Translational Accuracy

Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...