Development and qualification of an automated capillary Western method for the identification of polysaccharide...

Area of Science:

• Vaccinology
• Analytical Chemistry
• Microbiology

Background:

• Streptococcus pneumoniae infections pose significant mortality risks in adults and infants.
• Pneumococcal conjugate vaccines (PCVs) are crucial for disease prevention.
• Accurate identification of polysaccharide serotypes in multi-valent PCVs is essential for quality control.

Purpose of the Study:

• To develop and qualify an analytical assay for identifying individual polysaccharide components in multi-valent PCVs.
• To ensure the quality and consistency of PCV products, including Vaxneuvance™.

Main Methods:

• Development of an identity assay utilizing an automated capillary western system (Simple Western).
• Implementation of a multi-valent system suitability sample (SSS) for determining individual polysaccharide components.
• Rigorous analytical development and optimization of the assay.

Main Results:

• The developed Simple Western assay successfully identified individual polysaccharide components within a multi-valent PCV.
• The assay was qualified for use in the clinical release of PCVs.
• Demonstrated high efficacy of PCVs for adult and pediatric doses.

Conclusions:

• The automated capillary western system provides a robust method for PCV identity testing.
• This assay is critical for ensuring the quality attribute of specific polysaccharide identification in complex vaccine formulations.
• The qualified assay supports the clinical release of PCVs, contributing to public health efforts against pneumococcal disease.