Ibalizumab does not recognize CD4 in other animal species; only monkeys are relevant
“Pharmacokinetic and toxicokinetic studies with ibalizumab were only performed in monkeys (Rhesus and Cynomolgus), because CD4 in other animal models is not recognized by Hu5A8.”
Cynomolgus monkey (pre-/postnatal study only); no fertility or embryo-fetal studies
“No reproductive, no early embryonic or embryo-fetal developmental studies were performed. According to ICH 6 guideline, the potential maternal and developmental effects of ibalizumab in pregnant cynomolgus monkeys and their offspring were evaluated.”
Not conducted: ibalizumab does not bind rodent CD4
“Standard 2-year carcinogenicity studies in rodents or 6-month studies in transgenic mice were not possible, because ibalizumab does not bind rodent CD4.”