Nipocalimab in humanized FcRn Tg32 mice: collagen antibody-induced arthritis and immune thrombocytopenia models
“Improvement of the disease pathology was demonstrated in the collagen antibody-induced arthritis (CAIA) Tg32 mouse model and increasing platelet levels was shown in the immune thrombocytopenia (ITP) Tg32 mouse model.”
No gMG animal model studied; human FcRn transgenic mice used in autoantibody-mediated disease models instead
“No proof-of-concept studies were conducted in gMG models; however, IV administration of nipocalimab to transgenic mice expressing human FcRn reduced autoantibody-mediated effects in models of collagen-induced arthritis and immune-mediated thrombocytopenia.”
EMA: accepted as in vivo proof of concept for the mechanism, although not myasthenia gravis models
“These studies can nevertheless be accepted as non-clinical in-vivo proof of concept for the mechanism of action of nipocalimab, although they are not disease models for myasthenia gravis.”