Binds only human and chimpanzee CD38, not mouse, rat, rabbit, pig, cynomolgus or rhesus CD38
“Daratumumab binds to human and chimpanzee CD38, but not to CD38 of species typically used for nonclinical toxicology testing, ie, mouse, rat, rabbit, pig, and cynomolgus and rhesus monkey.”
FDA: xenograft studies showed reduced tumor growth, but contribution of each mechanism to clinical efficacy remains unknown
“Importantly, the degrees to which the known mechanisms contribute to the clinical efficacy of daratumumab is still unknown. In vivo pharmacology studies showed that daratumumab reduced tumor growth and burden in human lymphoma xenograft mouse models.”
✓ VerifiedFDA pharmacology/toxicology review, p. 17Source ↗