“In line with the guideline on the pre-clinical safety evaluation of biotechnology-derived pharmaceuticals (ICH S6 R1), no genotoxicity studies were carried out.”
Not conducted; rodent studies not feasible (no binding to rodent TSLP); carcinogenicity risk assessment conducted
“The conduct of carcinogenicity studies in rodents was not feasible as tezepelumab does not bind to rodents’ TSLP. Therefore, a carcinogenicity risk assessment was conducted.”
✓ VerifiedFDA multi-discipline review, p. 34Source ↗
Instead of carcinogenicity
Not stated in public reviews
Not reported in the public reviews. Reviewers summarise selectively, so this usually means it wasn't discussed publicly, not that it wasn't studied.
Instead of genotoxicity
Not stated in public reviews
Not reported in the public reviews. Reviewers summarise selectively, so this usually means it wasn't discussed publicly, not that it wasn't studied.
DRG histopathology
Not stated in public reviews
Not reported in the public reviews. Reviewers summarise selectively, so this usually means it wasn't discussed publicly, not that it wasn't studied.
Reproductive & developmental
Monkey ePPND (IV 50 or 300 mg/kg Q7D, early gestation through delivery): no maternal, fetal or infant effects
“In the maternal, embryo-fetal, and neonatal toxicity (ePPND) study, pregnant female cynomolgus monkeys were dosed Q7D at 50 or 300 mg/kg IV from early gestation through delivery. There were no tezepelumab-related effects (maternal, fetal, or infant).”
Single-dose IV monkey study up to 300 mg/kg: no effect on hemodynamics, body temperature, respiration, ECG or neurobehavior
“In an in vivo safety pharmacology study conducted in the cynomolgus monkey, single dose IV injection of tezepelumab up to 300 mg/kg did not affect hemodynamic parameters, body temperature, respiration rate, ECG, or neurological behavior.”
✓ VerifiedFDA multi-discipline review, p. 34Source ↗
Genotox: Ames
Not conducted (ICH S6(R1))
“In line with the guideline on the pre-clinical safety evaluation of biotechnology-derived pharmaceuticals (ICH S6 R1), no genotoxicity studies were carried out.”
“In line with the guideline on the pre-clinical safety evaluation of biotechnology-derived pharmaceuticals (ICH S6 R1), no genotoxicity studies were carried out.”
“In line with the guideline on the pre-clinical safety evaluation of biotechnology-derived pharmaceuticals (ICH S6 R1), no genotoxicity studies were carried out.”
Not conducted: rodent studies not feasible (no binding to rodent TSLP)
“The conduct of carcinogenicity studies in rodents was not feasible as tezepelumab does not bind to rodents’ TSLP.”
✓ VerifiedFDA multi-discipline review, p. 34Source ↗
Carcinogenicity timing
Not required: weight of evidence; additional studies would not add clinically relevant data
“Therefore, given the limitations of the available rodent models and the weight of evidence indicating a lack of product-specific concern for the carcinogenicity potential for tezepelumab, it was determined that additional nonclinical studies would not offer new significant clinically relevant data to inform the risk”
No hERG assay; single IV 300 mg/kg in telemetered monkeys: no effect on ECG or hemodynamics
“In an in vivo safety pharmacology study conducted in the cynomolgus monkey, single dose IV injection of tezepelumab up to 300 mg/kg did not affect hemodynamic parameters, body temperature, respiration rate, ECG, or neurological behavior.”
✓ VerifiedFDA multi-discipline review, p. 34Source ↗