Causes of HCP Residue
Host cell proteins (HCP) refer to the protein components derived from the production cell lines in biological products. This includes both structural proteins of host cells and growth-promoting factors secreted by the host cells. HCPs are a complex mixture with various physicochemical and immunological properties, serving as a major process-related impurity. HCPs are a heterogeneous class of protein contaminants that are unavoidable impurities in biological products, potentially arising during recombinant fermentation processes or being introduced from exogenous substances. If the HCP content exceeds a certain level, it is likely to cause immune responses or other adverse reactions.
HCPs constitute the main part of process-related impurities in the production of biological formulations. During the host cell production process, due to cell apoptosis, death, lysis, and other life activities, non-essential proteins in host cells are released. As a result, cell culture-based biopharmaceutical processes produce and retain a large amount of HCPs. However, even after multiple complex separation and purification processes, HCPs may co-purify with biopharmaceutical products or separate with sample products, making it difficult to completely separate the residual HCPs. Additionally, due to the diversity of HCPs and the wide range of their molecular weight and abundance, many HCPs have molecular weights and abundance that differ by several orders of magnitude from the target protein molecules, increasing the difficulty of HCP detection and analysis.
Many HCPs may affect the properties of the product and interact with the product during production and storage, potentially impacting the product's immunogenicity, biological activity, and safety. With the continuous advancement of HCP characterization technologies, as well as the practicality of proteomics databases and the ongoing development of existing genomic information and algorithms, future HCP detection will become increasingly accurate. It is hoped that based on these data, the immunogenicity, biological activity, safety of HCPs, and their interactions with target proteins can be predicted. This will better guide standardized production and quantitative risk assessment, and improve the quality and stability of the final product.
Bio-Techne provides biopharmaceutical analysis services, including host protein residues ( HCP ) analysis services. Bio-Techne has experienced technical personnel who can provide a full range of professional services including experimental design, sample testing, and data analysis to accurately detect potential residual host proteins in biopharmaceuticals.
Related services:
Antibody-drug conjugates (ADCs) analysis
Protein purity analysis (size-exclusion/reverse-phase chromatography)
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