Product characterization in biologics development encompasses various aspects, including physicochemical and structural analysis, functional characterization, and the identification of critical quality attributes. These elements are essential to understand the behaviour and performance of biological products. By thoroughly examining these factors, researchers, and manufacturers can optimize their processes, improve product consistency, and meet regulatory requirements, ultimately bringing life-changing therapies to patients more efficiently.
Physicochemical and Structural Analysis
Physicochemical and structural analysis plays an important role in biologics development, providing essential insights into the complex nature of therapeutic proteins. This process involves examining the protein’s higher-order structure (HOS), which encompasses secondary, tertiary, and quaternary structures. Companies like Mabion (https://www.mabion.eu/process-development/) utilize advanced analytical techniques to ensure the quality, stability, and efficacy of biopharmaceutical products.
Various analytical approaches are employed to detect changes in HOS, including circular dichroism (CD), nuclear magnetic resonance (NMR), and Fourier transform infrared spectroscopy (FTIR). These methods allow researchers to study subtle structural changes that may occur during processing, storage, or handling. Additionally, techniques such as dynamic light scattering (DLS) and size-exclusion chromatography (SEC) are used to assess protein aggregation, meeting regulatory expectations for orthogonal methods.
The relationship between HOS and biological activity has become increasingly important in biologics development. Potency testing, which measures the product’s physiological response, influences the overall characterization process. This comprehensive approach to physicochemical and structural analysis aids in formulation development, stability studies, and regulatory submissions, ensuring the production of safe and effective biotherapeutics.
Functional Characterization
Another significant step is functional characterization, ensuring the safety, efficacy, and quality of biopharmaceutical products. Companies like Mabion employ various analytical techniques to assess the functional properties of biologics. Potency testing, a key aspect of functional characterization, measures the physiological response of the product and influences the overall characterization process. This testing is essential for confirming comparability between innovator and biosimilar products.
Bioassays, both in vitro and in vivo, are utilized to evaluate the potency of biologics. These assays are designed to reflect the mechanism of action (MoA) of the test item and are optimized to meet guideline requirements for validation and routine testing. The development process focuses on establishing robust and reproducible methods that can accurately assess the potency of various biologics, including proteins, cell and gene therapy products, and vaccines.
