Details

Autor(en) / Beteiligte

• Chevillard, Christopher
• Amen, Axelle
• Besson, Solène
• Hannani, Dalil
• Bally, Isabelle
• Dettling, Valentin
• Gout, Evelyne
• Moreau, Christophe J.
• Buisson, Marlyse
• Gallet, Salomé
• Fenel, Daphna
• Vassal-Stermann, Emilie
• Schoehn, Guy
• Poignard, Pascal
• Dagher, Marie-Claire
• Fender, Pascal

Titel

Elicitation of potent SARS-CoV-2 neutralizing antibody responses through immunization with a versatile adenovirus-inspired multimerization platform

Ist Teil von

• Molecular therapy, 2022-05, Vol.30 (5), p.1913-1925

Ort / Verlag

United States: Elsevier Inc

Erscheinungsjahr

2022

Quelle

MEDLINE

Beschreibungen/Notizen

• Virus-like particles (VLPs) are highly suited platforms for protein-based vaccines. In the present work, we adapted a previously designed non-infectious adenovirus-inspired 60-mer dodecahedric VLP (ADDomer) to display a multimeric array of large antigens through a SpyTag/SpyCatcher system. To validate the platform as a potential COVID-19 vaccine approach, we decorated the newly designed VLP with the glycosylated receptor binding domain (RBD) of SARS-CoV-2. Cryoelectron microscopy structure revealed that up to 60 copies of this antigenic domain could be bound on a single ADDomer particle, with the symmetrical arrangements of a dodecahedron. Mouse immunization with the RBD decorated VLPs already showed a significant specific humoral response following prime vaccination, greatly reinforced by a single boost. Neutralization assays with SARS-CoV-2 spike pseudo-typed virus demonstrated the elicitation of strong neutralization titers, superior to those of COVID-19 convalescent patients. Notably, the presence of pre-existing immunity against the adenoviral-derived particles did not hamper the immune response against the antigen displayed on its surface. This plug and play vaccine platform represents a promising new highly versatile tool to combat emergent pathogens. [Display omitted] In this study, Chevillard and colleagues report a non-infectious adenovirus-inspired self-assembling particle designed to spontaneously and covalently display up to 60 SARS-CoV-2 glycoantigens. Immunization of mice with this pseudoviral mimic generates a strong neutralizing antibody response capable of neutralizing SARS-CoV-2 in the long term. A new tool for pandemic preparedness.