用循环离子流动性质谱法对治疗性寡核酸同位素杂质的分离和鉴定
Shogo Omuro1, Takao Yamaguchi1, Taiji Kawase2
1Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan.
Journal of the American Society for Mass Spectrometry
|July 31, 2024
概括
循环离子移动性质谱 (IMS) 有效地分离和表征治疗性寡核酸异构体,包括诸如缩短剂和改性形式等杂质. 这种方法提高了新型寡核酸治疗的质量控制.
科学领域:
- 制药科学 制药科学
- 分析化学 分析化学
- 生物技术是生物技术.
背景情况:
- 治疗性寡核酸,如反意义寡核酸 (ASO) 和小干扰RNA (siRNA),对于基因表达调制至关重要.
- 液体染色学-质谱学 (LC/MS) 对于质量控制至关重要,可以量化治疗性寡核酸和杂质.
- 分离和定量可能影响毒性的寡核酸异构体,仍然是当前LC/MS方法的挑战.
研究的目的:
- 开发和验证一种用于分离和表征寡核酸同位素的方法.
- 评估循环离子移动性质谱法 (循环IMS) 的实用性,以区分具有相同质量电荷比的异构体.
主要方法:
- 利用循环离子移动性质谱法 (循环IMS) 根据结构差异来分离离子.
- 分析了帕蒂西兰的反感和感觉链,包括它们的n-1和底层同位素.
- 研究了givosiran反感链的酸 (PS) 转化为极 (PO) 的异构体.
主要成果:
- 循环IMS成功地分离和表征了各种寡核酸异构体.
- 使用周期性IMS.实现了帕蒂西兰异构体的比率确定.
- 吉沃西兰的PS → PO转换异构体表现出明显的mobiligram模式,表明成功分化.
结论:
- 循环IMS是一种强大而有前途的技术,用于治疗性寡核酸同位素的分离和表征.
- 这种方法解决了在寡核酸质量控制中需要精确的异构体分析的需求.
- 这些发现支持采用周期性IMS来确保寡核酸治疗药物的安全性和有效性.
更多相关视频
09:34Improved Polymerase Chain Reaction-restriction Fragment Length Polymorphism Genotyping of Toxic Pufferfish by Liquid Chromatography/Mass Spectrometry
Published on: September 20, 2016
11.1K
10:32On-chip Isotachophoresis for Separation of Ions and Purification of Nucleic Acids
Published on: March 2, 2012
24.5K
相关概念视频
Ion-Exchange Chromatography
423
Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
423
Capillary Electrophoresis: Applications
368
Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
368
Chemical Ionization (CI) Mass Spectrometry
716
The molecular ion peak of a molecule in the mass spectrum provides vital information for molecular identification. However, conventional electron impact ionization can lead to the rapid dissociation of some molecular ions before they reach the detector. A milder ionization method is required to increase the lifetime of such ionized analyte molecules. Chemical ionization (CI) is a gas-phase protonation reaction useful for mass-analyzing analyte molecules that are easily protonated to yield the...
716
Mass Spectrometry: Complex Analysis
737
Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
737
High-Resolution Mass Spectrometry (HRMS)
1.3K
The resolution of a mass spectrometer depends on the efficiency of separating ions with different ion masses. The mass of an atom is approximated to the sum of the masses of protons and neutrons inside, considering the masses of protons and neutrons as equal. However, the masses of the proton (1.6726 × 10−24 g) and neutron (1.6749 × 10−24 g) are not truly equal. There is a minor error in the expression of atomic masses relative to the simplest atom of hydrogen. For...
1.3K
Affinity Chromatography
583
Affinity chromatography is a powerful technique extensively utilized for separating and purifying specific biomolecules from complex mixtures. It capitalizes on the highly selective binding between an analyte and its counterpart, such as antibody-antigen interactions. The counterpart is immobilized on the stationary phase, forming an affinity column. The stationary phase typically consists of solid support, such as agarose or porous glass beads, immobilizing the affinity ligand. The mobile...
583
