在蛋白质A染色体和低pH病毒失活过程中减轻聚合的策略,用于nivolumab生物类似物候选物
Elizabeth Pargas-Ferrer1, Sum Lai Lozada Chang1, Katia García1
1Center of Molecular Immunology, 216 Street and 15th Avenue Atabey-Siboney Playa P.O. Box 16040, Havana, 11600, Cuba.
Journal of chromatography. A
|January 21, 2025
概括
蛋白A色谱可以导致抗体聚合. 将曼尼托尔添加到化缓冲器中,可以显著降低尼沃卢马布 (一种IgG4抗体) 的聚合,从而保持高的生物活性.
科学领域:
- 生物制药制造业 生物制药制造业
- 蛋白质化学 蛋白质化学
- 过程开发 过程开发
背景情况:
- 蛋白A色谱是单克隆抗体 (mAb) 净化的主要方法.
- 蛋白A色谱中的低pH化缓冲器可以诱导产品聚合,特别是对于像尼沃卢马布这样的IgG4抗体.
- 尼沃卢马布是一种关键的治疗抗体,向PD-1,因此聚合缓解是必不可少的.
研究的目的:
- 开发一种策略,在蛋白质A染色学过程中最大限度地减少nivolumab的聚合.
- 评估不同化缓冲器和添加剂在防止抗体聚合方面的有效性.
- 确定维护尼沃卢马布稳定性和净化后生物活性的最佳条件.
主要方法:
- 进行了缩小蛋白质A亲和色谱实验.
- 甘氨酸-HCl和酸缓冲剂在各种pH值 (3.25-3.75) 测试.
- 进行了对添加剂的选,包括曼尼托尔,希斯蒂丁,糖,比托尔,氨酸,三糖,聚酸盐80,尿素和MgCl2进行了选.
- 最有效的稳定剂在实验室范围内进一步评估,然后在高IgG度下进一步评估.
主要成果:
- 尼沃卢马布的聚合高度依赖pH值.
- 在pH值3.5的酸缓冲剂显示在缓解聚合方面有好处.
- 与没有添加剂相比,曼尼托,80聚酸盐和MgCl2显著改善了单体控制比率.
- 曼尼托尔被证明是最有效的稳定剂,可以在各种尺度和度中将聚合物从15%降低到≤2%,同时保持生物活性.
结论:
- 使用特定的化缓冲器和添加剂的精确定义的策略可以有效地控制蛋白A染色学期间的nivolumab聚合.
- 曼尼托尔是一种高效的辅助剂,用于稳定nivolumab,防止低pH诱导的聚合.
- 优化的过程确保了尼沃卢马布的高纯度和维持生物活性,这对于治疗疗效至关重要.
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