Experimental Comparison of 3 Quantitation Methods in USP <1132.1>

The demand for orthogonal methods providing detailed information on individual HCPs has increased.

This has culminated in the establishment of the new USP-NF Chapter 〈1132.1〉 Residual Host Cell Protein Measurement in Biopharmaceuticals by Liquid Chromatography-Mass Spectrometry, which outlines 3 methods for quantifying HCPs using mass spectrometry (MS).

HCP analysis by MS is complex, expensive, and necessitates skilled professionals for setup and operation, and its implementation can pose significant challenges. This raises the question: how can these methods be integrated into practical testing, and what are the advantages, disadvantages, and potential pitfalls of each method?

• Comparative Analysis: A side-by-side comparison of the three LC-MS methods, demonstrating how each approach works and what results they yield.
• Strengths and Weaknesses: Which method is best suited for different stages in biopharmaceutical development, e.g., early development, drug substance release, process monitoring, or impurity clearance studies?