Jian-Zhong Liu, Chao-Yang Du, Han Gao, Haibin Wang, Feng Hu, Wei-Jie Fang
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The purposes of the current study are to introduce an underlying cause from a novel perspective on the protein-protein interaction (PPI) mechanism, characterized by quantifying diffusion interaction parameter (k<sub>D</sub>) values, and to provide several strategies to reduce PPI and improve column performance during SEC analysis.</p><p><strong>Methods: </strong>Two kinds of ADCs with varying hydrophobicity properties and their corresponding monoclonal antibodies are used as models. The hydrophobicity of these products was verified using the relative calculated logarithm of the partition coefficient of a substance in n-octanol (oil) and water (rCLogP) and reversed-phase high performance liquid chromatography (RP-HPLC), and the size variants were analyzed using SEC. Finally, the PPI was characterized by k<sub>D</sub> values of these four products.</p><p><strong>Results: </strong>The results of rCLogP and RP-HPLC indicated that ADC-1 is relatively hydrophobic, whereas ADC-2 is relatively hydrophilic. In the SEC analysis of the ADC-1, substituting sodium chloride with L-arginine hydrochloride or adding a specific concentration of acetonitrile as an organic solvent to the mobile phase resulted in reduced PPI and enhanced column performance. Conversely, the impact on ADC-2 was negligible.</p><p><strong>Conclusions: </strong>This study provides insights into improving the performance of SEC analysis for ADCs through strategies involving alterations in mobile phase composition. 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引用次数: 0
摘要
目的:抗体药物共轭物(ADC)的尺寸变异经常通过尺寸排阻色谱法(SEC)进行评估。然而,在 SEC 分析过程中经常会发现色谱性能不佳。现有研究主要侧重于定性描述 ADC 与色谱柱基质之间的非特异性相互作用。本研究的目的是从蛋白质-蛋白质相互作用(PPI)机制的新角度介绍其根本原因,通过量化扩散相互作用参数(kD)值来描述其特征,并提供几种策略来减少 PPI 并改善 SEC 分析过程中的色谱柱性能:方法:以两种疏水性不同的 ADC 及其相应的单克隆抗体为模型。用物质在正辛醇(油)和水中分配系数的相对计算对数(rCLogP)和反相高效液相色谱法(RP-HPLC)验证了这些产品的疏水性,并用 SEC 分析了它们的粒度变化。最后,根据这四种产物的 kD 值对 PPI 进行了表征:rCLogP和RP-HPLC的结果表明,ADC-1相对疏水,而ADC-2相对亲水。在对 ADC-1 进行 SEC 分析时,用 L- 精氨酸盐酸盐代替氯化钠或在流动相中添加特定浓度的乙腈作为有机溶剂可降低 PPI 并提高色谱柱性能。相反,对 ADC-2 的影响可以忽略不计:这项研究为通过改变流动相组成的策略来提高 ADC 的 SEC 分析性能提供了启示。色谱柱性能的变化可以用 PPI 机制来定量解释。
An Underlying Cause and Solution to the Poor Size Exclusion Chromatography Performance of Antibody-Drug Conjugates.
Purposes: Antibody-drug conjugate (ADC) size variants are frequently assessed by size exclusion chromatography (SEC). However, poor chromatography performance is often observed during SEC analysis. Existing studies have primarily focused on qualitatively describing non-specific interactions between ADCs and the column matrix. The purposes of the current study are to introduce an underlying cause from a novel perspective on the protein-protein interaction (PPI) mechanism, characterized by quantifying diffusion interaction parameter (kD) values, and to provide several strategies to reduce PPI and improve column performance during SEC analysis.
Methods: Two kinds of ADCs with varying hydrophobicity properties and their corresponding monoclonal antibodies are used as models. The hydrophobicity of these products was verified using the relative calculated logarithm of the partition coefficient of a substance in n-octanol (oil) and water (rCLogP) and reversed-phase high performance liquid chromatography (RP-HPLC), and the size variants were analyzed using SEC. Finally, the PPI was characterized by kD values of these four products.
Results: The results of rCLogP and RP-HPLC indicated that ADC-1 is relatively hydrophobic, whereas ADC-2 is relatively hydrophilic. In the SEC analysis of the ADC-1, substituting sodium chloride with L-arginine hydrochloride or adding a specific concentration of acetonitrile as an organic solvent to the mobile phase resulted in reduced PPI and enhanced column performance. Conversely, the impact on ADC-2 was negligible.
Conclusions: This study provides insights into improving the performance of SEC analysis for ADCs through strategies involving alterations in mobile phase composition. The changes in column performance can be quantitatively explained by the PPI mechanism.
期刊介绍:
Pharmaceutical Research, an official journal of the American Association of Pharmaceutical Scientists, is committed to publishing novel research that is mechanism-based, hypothesis-driven and addresses significant issues in drug discovery, development and regulation. Current areas of interest include, but are not limited to:
-(pre)formulation engineering and processing-
computational biopharmaceutics-
drug delivery and targeting-
molecular biopharmaceutics and drug disposition (including cellular and molecular pharmacology)-
pharmacokinetics, pharmacodynamics and pharmacogenetics.
Research may involve nonclinical and clinical studies, and utilize both in vitro and in vivo approaches. Studies on small drug molecules, pharmaceutical solid materials (including biomaterials, polymers and nanoparticles) biotechnology products (including genes, peptides, proteins and vaccines), and genetically engineered cells are welcome.