“The cynomolgus monkey was the only nonclinical species demonstrated to be pharmacologically relevant, and the nonclinical program was conducted only in that species.”
✓ VerifiedFDA pharmacology/toxicology review, p. 6Source ↗
Why that species
Comparable binding to monkey and human C1s (EC50 0.13 vs 0.15 nM) and similar hemolysis inhibition; no binding/inhibition in mouse, rat, rabbit, minipig, dog
“Sutimlimab binds cynomolgus monkey and human C1s with comparable affinity (EC50, 0.13 nM and 0.15 nM, respectively)”
✓ VerifiedFDA pharmacology/toxicology review, p. 6Source ↗
Surrogate molecule
No surrogate; the clinical antibody was tested in cynomolgus monkeys
“The cynomolgus monkey was the only nonclinical species demonstrated to be pharmacologically relevant, and the nonclinical program was conducted only in that species.”
✓ VerifiedFDA pharmacology/toxicology review, p. 6Source ↗
Species: general tox
Cynomolgus monkey only
“The cynomolgus monkey was the only nonclinical species demonstrated to be pharmacologically relevant, and the nonclinical program was conducted only in that species.”
✓ VerifiedFDA pharmacology/toxicology review, p. 6Source ↗
Species: DART
Cynomolgus monkey (ePPND, 60 and 180 mg/kg/week); no dedicated fertility study
“An enhanced pre- and post-natal developmental (ePPND) toxicity study was conducted in pregnant monkeys with intravenous administration of 60 and 180 mg/kg/week sutimlimab (during organogenesis to parturition) to evaluate the potential for embryo-fetal and pre/post-natal developmental toxicity.”
✓ VerifiedFDA pharmacology/toxicology review, p. 7Source ↗
Species: carcinogenicity
Not conducted (weight-of-evidence assessment instead)
“The applicant’s non-clinical package did not include a traditional in vivo carcinogenicity assessment. Instead, the applicant provided a weight-of-evidence (WOE)-based assessment of carcinogenic potential (per ICH S6).”
✓ VerifiedFDA pharmacology/toxicology review, p. 40Source ↗
Surrogate used in
No surrogate used; clinical antibody tested in cynomolgus monkeys
“The cynomolgus monkey was the only nonclinical species demonstrated to be pharmacologically relevant, and the nonclinical program was conducted only in that species.”
✓ VerifiedFDA pharmacology/toxicology review, p. 6Source ↗