Innovative Metrics for Reporting and Comparing the Glycan Structural Profile in Biotherapeutics

Area of Science:

• Biopharmaceutical Quality Control
• Analytical Chemistry
• Glycobiology

Background:

• Glycosylation is a critical quality attribute in biotherapeutics, influencing stability, efficacy, and immunogenicity.
• The heterogeneity and complexity of protein glycosylation pose significant analytical challenges.
• Lack of standardized metrics impedes comparability studies and manufacturing control strategies for glycosylation.

Purpose of the Study:

• To propose a standardized approach using novel metrics for comprehensive glycosylation fingerprinting.
• To facilitate objective reporting and comparison of glycosylation profiles in biotherapeutics.
• To address the challenges in characterizing complex glycosylation patterns.

Main Methods:

• Development of a standardized analytical workflow based on liquid chromatography-mass spectrometry (LC-MS).
• Implementation of a multi-attribute method for glycosylation analysis.
• Computation of a matrix of glycosylation-related quality attributes at site-specific and whole molecule levels.

Main Results:

• A novel set of metrics was developed to create a comprehensive glycosylation fingerprint.
• The proposed indices enable standardized and versatile reporting of all glycosylation profile dimensions.
• Two case studies demonstrated the applicability of the new metrics for biotherapeutic characterization.

Conclusions:

• The standardized approach enhances the reporting and objective comparison of biotherapeutic glycosylation profiles.
• This method facilitates risk assessments related to glycosylation changes affecting product quality attributes.
• The proposed metrics are essential for establishing robust manufacturing control strategies for biotherapeutics.