对于通过离子对预留相流体染色学质谱法分离寡核酸的pH效应
Stilianos G Roussis1, Claus Rentel1
1Analytical Development & Quality Control, Ionis Pharmaceuticals, Carlsbad, CA 92010, USA.
Journal of chromatography. A
|November 24, 2025
概括
这项研究引入了一种新的pH控制色谱法,用于分离合成寡核酸 (siRNA) 中的杂质. 该技术增强了杂质检测,这对于制造安全有效的寡核酸治疗药物至关重要.
科学领域:
- 分析化学 分析化学
- 生物化学 生物化学
- 制药科学 制药科学
背景情况:
- 合成的寡核酸,包括反意义和小干扰RNA (siRNA),显示出显著的治疗前景.
- 在寡核酸制造中对低水平杂质的表征具有挑战性,特别是在共化和同化合物中.
- 现有的杂质分离方法可能很复杂,需要除硫或高分辨率质谱 (HRMS) 等步骤.
研究的目的:
- 开发一种改进的方法,在生产寡核酸时分离共化和同杂质.
- 为了研究pH对离子对逆相染色学 (IP-RP) 对寡核酸杂质分析的影响.
- 为了简化杂质的定量分析,例如除 (DA) 产品.
主要方法:
- 使用控制pH条件的离子对逆相色谱 (IP-RP).
- 研究了酸性和性pH对寡核酸杂质分离的影响.
- 在选择的离子监测 (SIM) 模式中使用质谱 (MS) 进行敏感检测.
- 分析压力样本以评估使用紫外线和多发性硬化检测随时间的消毒.
主要成果:
- 在酸性条件下,通过利用pKa差异,从原始寡核酸中有效地分离了共同排泄的,接近同位素脱胺 (DA) 的杂质.
- 在基本条件下,根据电子阴性/极性差异证明了其他杂质的最佳分离.
- 展示了特定的异杂质的分离,如n-dMeC从n-T和n-MOE MeC从n-MOE T.
- 在压力样本中,确认了除染程度和检测方法 (UV,MS) 之间的线性关系.
结论:
- 与现有技术相比,新的pH启用IP-RP染色法为寡核酸杂质分析提供了更快,更简单的方法.
- 这种方法有效地分离关键杂质,简化了定量分析,并改善了寡核酸治疗药物的质量控制.
- 该方法减轻了与低水平杂质检测相关的挑战,提高了合成寡核酸药物的安全性和有效性.
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