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<dc:title xml:lang="en">Development of host cell protein impurities quantification methods by mass spectrometry to control the quality of biopharmaceuticals</dc:title>
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<dcterms:abstract xml:lang="fr">Les récents progrès instrumentaux en spectrométrie de masse, notamment en terme de- rapidité de balayage et de résolution, ont permis l'émergence de l'approche « data independent acquisition» (DIA). Cette approche promet de combiner les points forts des approches « shotgun » et ciblées,mais aujourd'hui l'analyse des données DIA reste compliquée. L'objectif de cette thèse a été de développer des méthodes innovantes de spectrométrie de masse, et en particulier d'améliorer l'analyse des données DIA. De plus, nous avons développé une approche originale Top 3-ID-DIA, permettant à la fois un profilage complet des protéines de la cellule hôte (HCP) ainsi qu'une quantification absolue d'HCP clés dans les échantillons d'anticorps monoclonaux (mAb), au sein d'une même analyse.Cette méthode est prête à être implémentée en industrie, et pourrait fournir un support en temps réel aux développements du procédé de production de mAb, ainsi que pour évaluer la pureté des biomédicaments.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Recent instrumental developments in mass spectrometry, notably in terms of scan speed and resolution, allowed the emergence of “data independent acquisition” (DIA) approach. This approach promises to combine the strengths of both shotgun and targeted proteomics, but today DIA data analysis remains challenging. The objective of my PhD was to develop innovative mass spectrometry approaches, and in particular to improve DIA data analysis. Moreover, we developed an original Top 3-ID-DIA approach, allowing both a global profiling of host cell proteins (HCP) and an absolute quantification of key HCP in monoclonal antibodies samples, within a single analysis. This method is ready to be transferred to industry, and could provide a real time support for mAb manufacturing process development, as well as for product purity assessment.</dcterms:abstract>
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