Ex vivo hemolysis inhibition in serum from pozelimab-treated C5 humanized mice and normal monkeys
“Following administration to C5 humanized mice and normal monkeys, pozelimab blocked classical and alternative pathway-initiated hemolysis in serum samples ex vivo.”
✓ VerifiedFDA multi-discipline review, p. 37Source ↗
Why that model
CD55 knockout mouse lacks the CHAPLE phenotype, so no acceptable animal disease model
“Importantly, though a CD55 knockout mouse model exists, it does not display the CHAPLE disease phenotype, and thus is not considered an acceptable animal disease model in which one could demonstrate potential clinical effectiveness of pozelimab in subjects with CHAPLE disease.”
✓ VerifiedFDA multi-discipline review, p. 144Source ↗
Reviewer's view of the efficacy data
FDA: nonclinical data give strong mechanistic support as confirmatory evidence of effectiveness
“Nonclinical data provide strong mechanistic support as confirmatory evidence of effectiveness for pozelimab in the treatment of subjects with CHAPLE disease.”
✓ VerifiedFDA multi-discipline review, p. 144Source ↗