Native LC-MS for capturing quality attributes of biopharmaceuticals on the intact protein level

Intact protein analysis by means of mass spectrometry has become a well-established method for the characterization of biotherapeutics. However, due to the highly complex nature of recombinant proteins, prior chromatographic separation is inevitable for a comprehensive analysis. In recent years, progress in coupling a variety of liquid chromatography-based native separation modes such as size exclusion, ion exchange and hydrophobic interaction chromatography to mass spectrometry (native LC-MS) has been reported, therefore allowing for rapid assessment of molecular mass and deep characterization of the heterogeneity of complex, recombinantly produced therapeutic proteins. Here we provide a comprehensive overview of recent advances in the development and application of native LC-MS for biopharmaceutical characterization.

Automated summary

Intact protein analysis using mass spectrometry is a well-established method for characterizing biotherapeutics, but chromatographic separation is necessary due to the complexity of recombinant proteins. Recent progress has been made in coupling liquid chromatography-based native separation modes with mass spectrometry, enabling rapid assessment of molecular mass and deep characterization of heterogeneity in therapeutic proteins.