HIC-Native Mass Spectrometry for Antibody Impurity Analysis
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Solution Overview
Problem
Current methods for characterizing therapeutic peptides and proteins are inadequate for rapid and sensitive high-throughput analysis, particularly in monitoring post-translational modifications and impurities during production and purification, which can affect the safety, efficacy, and shelf life of biopharmaceutical products.
Innovation Solution
The implementation of hydrophobic interaction chromatography-coupled native mass spectrometry provides a rapid and sensitive high-throughput method for characterizing peptides or proteins, enabling the identification and quantification of post-translational modifications, impurities, and drug-to-antibody ratios, using a chromatography column with hydrophobic groups and a mass spectrometer under native conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional characterization methods are used for therapeutic peptides and proteins, then the analysis can be conducted with standard equipment, but the analysis speed and sensitivity are insufficient for rapid high-throughput monitoring of post-translational modifications and impurities
Solution Approach 1:
The patent combines hydrophobic interaction chromatography (HIC) with native mass spectrometry (MS) into an integrated HIC-MS system. The HIC column separates proteins based on hydrophobicity, and the coupled mass spectrometer provides rapid, sensitive detection of separated components including post-translational modifications and impurities. This merging achieves both high-throughput separation and precise detection simultaneously.
Solution Approach 2:
The patent utilizes changes in mobile phase composition (salt concentration, pH, organic modifiers) to control protein elution from the HIC column. By dynamically adjusting these parameters, the system achieves rapid separation of protein variants with different hydrophobicity, enabling high-throughput analysis while maintaining detection sensitivity through optimized elution conditions.
2Reliability
If extensive characterization is performed to ensure product quality attributes, then safety and efficacy are preserved, but the analysis time and complexity increase significantly
Solution Approach 1:
The patent segments the characterization process into distinct functional components: HIC separation for resolving protein variants based on hydrophobicity, native MS for rapid mass detection, and data processing for quality attribute assessment. This segmentation allows each component to optimize its function, achieving comprehensive quality assurance through coordinated action of specialized modules rather than a single time-consuming method.
Solution Approach 2:
The patent replaces traditional mechanical/chemical characterization methods (such as Western blotting, ELISA, or sequential chromatographic steps) with a streamlined HIC-MS system. The mass spectrometer provides direct mass measurement and identification of protein variants, eliminating the need for multiple sequential analytical steps and reducing overall analysis time while maintaining reliability.
3Productivity
If high-throughput analytical methods are implemented for rapid monitoring, then production efficiency is improved, but the complexity of the analytical system increases
Solution Approach 1:
The patent implements a universal HIC-MS platform that can analyze multiple types of biopharmaceutical products (monoclonal antibodies, fusion proteins, antibody-drug conjugates) and detect various modifications (glycosylation, oxidation, deamidation) using the same core system. This multi-functionality achieves high-throughput capability without proportionally increasing system complexity, as the platform handles diverse analytes through standardized protocols.
Solution Approach 2:
The patent introduces an intermediary data processing and control system that manages the complex HIC-MS operations. This intermediary layer coordinates mobile phase delivery, column temperature control, mass spectrometer parameters, and data analysis, simplifying the user interface and operational complexity while enabling high-throughput automated analysis of biopharmaceutical products.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for efficient characterization of biopharmaceutical products, improving manufacturing processes by providing critical insights into production and purification, ensuring product quality and stability through precise analysis of modifications and impurities.
Implementation Method 1
contacting the sample to a solid surface, wherein the solid surface comprises a hydrophobic group
Data Source
AI summary
The present invention provides rapid, sensitive high-throughput methods and systems for characterizing peptides or proteins using hydrophobic interaction chromatography-coupled native mass spectrometry to improve manufacturing process of biopharmaceutical products, such as identifying impurities during antibody purification, monitoring post-translational modification variants during production, or characterizing drug-to-antibody ratio of antibody-drug conjugates. The separation profiles of the peptides or proteins are generated and compared to identify or qualify the peptides or proteins.