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<dc:title xml:lang="en">Development of new mass spectrometry methods for the characterization of protein impurities in therapeutic antibodies</dc:title>
<dcterms:alternative xml:lang="fr">Développement de nouvelles méthodes de spectrométrie de masse pour la caractérisation d’impuretés protéiques dans des anticorps thérapeutiques.</dcterms:alternative>
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<dc:subject xml:lang="fr">Anticorps monoclonaux (mAbs)</dc:subject>
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<dc:subject xml:lang="fr">Acquisition indépendante des données (DIA)</dc:subject>
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<dc:subject xml:lang="en">Monoclonal Antibodies (mAbs)</dc:subject>
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<dcterms:abstract xml:lang="fr">Les protéines de cellule hôte (HCPs) sont des impuretés indésirables dans la production d’anticorps monoclonaux (mAbs), pouvant compromettre la sécurité, l’efficacité et la stabilité des traitements. Bien que l’ELISA soit couramment utilisée, elle présente des limites de couverture. Cette thèse explore des méthodes complémentaires basées sur la spectrométrie de masse. Une approche d’immuno-capture permet de détecter les HCPs non immune-réactifs, tandis que des workflows LC-MS/MS avancés avec des peptide standards offrent une quantification plus précise. Ces stratégies visent à améliorer le contrôle qualité dans la fabrication des mAbs.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Host cell proteins (HCPs) are unwanted by-products in the production of monoclonal antibodies (mAbs), and even at low levels, they can affect the safety, efficacy, and stability of biopharmaceuticals. While ELISA is widely used for HCP detection, it lacks full impurity coverage. This work explores complementary mass spectrometry-based methods to address these limitations. An immune-capture MS approach targets non-immunoreactive HCPs missed by ELISA, while advanced LC-MS/MS workflows using peptide standards enable more accurate and flexible quantification. These tools aim to improve impurity profiling and strengthen quality control in mAb manufacturing.</dcterms:abstract>
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