Quality attributes of CTVad1, a nanoemulsified adjuvant for phase I clinical trial of SpiN COVID-19 vaccine.
Bruna Rodrigues Dias AssisIsabela Pereira GomesJúlia Teixeira de CastroGraziella Gomes RivelliNatália Salazar de CastroDiana Paola Gomez-MendozaFlávia Fonseca BagnoNatália Satchiko Hojo-SouzaAna Luiza Chaves MaiaEduardo Burgarelli LagesFlavio Guimarães da FonsecaSantuza Maria Ribeiro TeixeiraAna Paula FernandesRicardo Tostes GazzinelliGisele Assis Castro GoulartPublished in: Nanomedicine (London, England) (2023)
Aim: To develop, characterize and evaluate an oil/water nanoemulsion with squalene (CTVad1) to be approved as an adjuvant for the SpiN COVID-19 vaccine clinical trials. Materials & methods: Critical process parameters (CPPs) of CTVad1 were standardized to meet the critical quality attributes (CQAs) of an adjuvant for human use. CTVad1 and the SpiN-CTVad1 vaccine were submitted to physicochemical, stability, in vitro and in vivo studies. Results & conclusion: All CQAs were met in the CTVad1 production process. SpiN- CTVad1 met CQAs and induced high levels of antibodies and specific cellular responses in in vivo studies. These results represented a critical step in the process developed to meet regulatory requirements for the SpiN COVID-19 vaccine clinical trial.