GlaxoSmithKline (GSK) and Vir Biotechnology have announced the submission of an application to the U.S. Food and Drug Administration (FDA) requesting Emergency Use Authorisation (EUA) for VIR-7831 (GSK4182136), an investigational dual-action SARS-CoV-2 monoclonal antibody, for the treatment of adults and adolescents (aged 12 years and older weighing at least 40 kg) with mild-to-moderate COVID-19 who are at risk for progression to hospitalisation or death.
The FDA EUA submission is based on an interim analysis of efficacy and safety data from the Phase III COMET-ICE (COVID-19 Monoclonal antibody Efficacy Trial – Intent to Care Early) trial, which evaluated VIR-7831 as monotherapy for the early treatment of COVID-19 in adults at high risk of hospitalisation.
Results of the interim analysis, based on data from 583 patients enrolled in the trial, demonstrated an 85% reduction in hospitalisation or death in those receiving VIR-7831 compared to placebo, the primary endpoint of the trial. As a result, the Independent Data Monitoring Committee recommended that the trial be stopped for enrolment due to evidence of profound efficacy. Data from the registrational COMET-ICE trial also will form the basis for a Biologics License Application (BLA) submission to the FDA.
Preclinical data suggest VIR-7831 targets a highly conserved epitope of the spike protein, which may make it more difficult for resistance to develop. New in vitro data from pseudotyped virus assays published online in bioRxiv in March 2021 support this hypothesis as they demonstrate that VIR-7831 maintains activity against current circulating variants of concern including the UK, South African and Brazilian variants. Based on additional soon to be published preclinical data, VIR-7831 also appears to maintain activity against the California variant.