Mouse-adapted SARS-CoV-2 (MA10) infection in BALB/c and 129 mice: reduced lung viral titres and disease
“PF-07321332 showed antiviral activity in mouse models with mouse-adapted (MA) SARS-CoV-2 infection in BALB/c and 129 mouse strains (studies 105036 and 022652).”
Mouse-adapted virus chosen over hACE2 transgenic mice for more clinically relevant phenotypes
“SARS-CoV-2 MA exhibited more clinically relevant phenotypes than those seen in Hfh4-ACE2 transgenic mice, which expresses human ACE2, and thus SARS-CoV-2 MA is used by numerous investigators in the SARS-CoV-2 field.”
EMA: in vivo proof-of-concept studies consistently support antiviral activity (lower lung titres, less disease)
“The in vivo proof of concept studies consistently support the antiviral activity of PF-07321332, as demonstrated by reduced infectious lung titres and ameliorated indicators of disease (weight loss and lung pathology) compared to placebo-treated animals”