fipv

GS-441524 treatment of cats with naturally occurring feline infectious peritonitis.

Mpro inhibitor N3 hemihydrate is a potent antagonist of the SARS-CoV-2 main protease (Mpro), with an EC50 of 16.77 μM against SARS-CoV-2. It specifically inhibits Mpro in various coronaviruses, including SARS-CoV, MERS-CoV, HCoV-229E (IC50 4.0 μM), FIPV (IC50 8.8 μM), and MHV-A59 (IC50 2.7 μM) [1][2].

GS-441524 is a potent inhibitor of feline infectious peritonitis (FIP) virus with an EC50 of 0.78 μM.. GS-441524 strongly inhibits feline infectious peritonitis (FIP) virus in tissue culture and experimental cat infection studies. GS-441524 is a molecular precursor to a pharmacologically active nucleoside triphosphate molecule. These analogs act as an alternative substrate and RNA-chain terminator of viral RNA dependent RNA polymerase. GS-441524 was non-toxic in feline cells at concentrations as high as 100 uM and effectively inhibited FIPV replication in cultured CRFK cells and in naturally infected feline peritoneal macrophages at concentrations as low as 1 uM. Note: GS-441524 is an active metabolite of Remdesivir.

RdRP-IN-2 is an RNA-dependent RNA polymerase (RdRp) inhibitor that significantly inhibits SARS-CoV-2 RdRp with an IC50 of 41.2 µM and also inhibits Feline coronavirus (FIPV) replication.