Proteomics

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Comparative analysis of ChAdOx1 nCoV-19 and Ad26.COV2.S SARS-CoV-2 vector vaccines

ABSTRACT: Vector-based SARS-CoV-2 vaccines such as AstraZeneca's ChAdOx1 nCoV-19 have been associated with vaccine-induced thrombosis (TTS/VITT). We studied ChAdOx1 nCov-19 (AstraZeneca) and Ad26.COV2.S (Johnson & Johnson) and compared the vaccines using proteomics with mass spectrometric measurements. We could demonstrate that ChAdOx1 nCoV-19 contained significant amounts of human proteins in addition to adenoviral proteins. This was not the case for Ad26.COV2.S. Among the detected human proteins, proteasome subunits beta 1/delta and beta 5/MB1 were identified. In summary, both studied SARS-CoV-2 vaccines are markedly different concerning their content of contaminating proteins, which is most likely a determining factor for different frequencies of TTS/VITT after their application.

INSTRUMENT(S): Orbitrap Exploris 480

ORGANISM(S): Homo Sapiens (human)

DISEASE(S): Covid-19

SUBMITTER: Christian Hentschker  

LAB HEAD: Uwe Völker

PROVIDER: PXD027344 | Pride | 2023-05-04

REPOSITORIES: Pride

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Vector-based SARS-CoV-2 vaccines have been associated with vaccine- induced thrombosis with thrombocytopenia syndrome (VITT/TTS), but the causative factors are still unresolved. We comprehensively analyzed the ChAdOx1 nCoV-19 (AstraZeneca) and Ad26.COV2.S (Johnson and Johnson) vaccines. ChAdOx1 nCoV-19 contains significant amounts of host cell protein impurities, including functionally active proteasomes, and adenoviral proteins. A much smaller amount of impurities was found in Ad26.COV2.S. Plat  ...[more]

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