Hemophilia A and B knockout mice, genetic hemophilia A dog and antibody-induced hemophilia A monkey
“The HA and HB mouse proof of concept data were further corroborated by studies in a genetic dog model of HA and in an HA monkey model where hemophilia was induced using an anti-FVIII monoclonal antibody (MAb).”
Antithrombin mRNA target conserved across mouse, rat, monkey (fully) and dog (highly), so the clinical siRNA works in disease models
“Fitusiran is pharmacologically active in mice, rats, dogs, and cynomolgus monkeys, as the AT mRNA target sequence is fully conserved (mice, rats, monkeys) or highly conserved (dogs) with the human sequence.”
FDA: hemophilia mouse studies provided important proof of concept and supported clinical development
“Studies in mouse hemophilia models provided important proof of concept data and supported the initiation of clinical development of fitusiran for the treatment of hemophilia.”