Perforin-deficient mice infected with LCMV (HLH model) treated with surrogate antibody XMG1.2
“For the disease model, perforin-deficient (pfp-/-) mice were infected with lymphocytic choriomeningitis virus and received single injections of XMG1.2 at 3, 10, 30 or 100 mg/kg on day 6 post-infection.”
✓ VerifiedFDA multi-discipline review, p. 23Source ↗
Why that model
Emapalumab does not neutralize mouse or rat IFN-γ
“Emapalumab neutralized human IFNγ in a dose dependent manner, with an IC50 of 0.9 μg/mL (equivalent to 6 nM), but was not active in mice or rats.”
✓ VerifiedFDA multi-discipline review, p. 27Source ↗
Reviewer's view of the efficacy data
FDA: nonclinical pharmacology and toxicology data adequate to support approval
“The nonclinical pharmacology and toxicology data submitted to this BLA are adequate to support the approval of emapalumab for the proposed indication.”
✓ VerifiedFDA multi-discipline review, p. 25Source ↗