Not conducted; not applicable to a therapeutic biologic protein
“Genetic toxicity studies were not applicable for this therapeutic biologic protein.”
✓ VerifiedFDA pharmacology/toxicology review, p. 2Source ↗
Carcinogenicity
Not conducted; waived given no related findings in 6-month monkey study and infeasible rodent study
“The need for a carcinogenicity study was discussed with the Executive Carcinogenicity Assessment Committee and it was concluded that a carcinogenicity study was not required given the lack of related findings in the 6-month toxicology study in monkeys and since conduct of a study in rodents did not appear to be technically feasible.”
✓ VerifiedFDA pharmacology/toxicology review, p. 2Source ↗
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 fertility (histopathology) and PPND: no effects up to 100 mg/kg IV (~70- and 30-fold margins); mouse surrogate FEED/EFD: no effects
“No effects on fertility or development parameters were identified in monkeys at doses up to 100 mg/kg IV; exposure margins of approximately 70-fold and 30-fold were available for fertility and developmental parameters, respectively. Similarly, no effects on fertility or embryofetal development parameters were identified in mice treated with the surrogate antibody.”
✓ VerifiedFDA pharmacology/toxicology review, p. 3Source ↗
Safety pharmacology
Dedicated single-dose IV monkey study: no effects on arterial pressure, heart rate, respiratory rate or renal parameters up to 100 mg/kg
“Mepolizumab at single intravenous doses up to 100 mg/kg had no effects on mean arterial pressure, heart rate, respiratory rate, urinary pH and water, osmolality, sodium, potassium, chloride, and creatinine excretion rates.”
✓ VerifiedFDA pharmacology/toxicology review, p. 51Source ↗
Genotox: Ames
Not conducted (not applicable to a biologic protein)
“Genetic toxicity studies were not applicable for this therapeutic biologic protein.”
✓ VerifiedFDA pharmacology/toxicology review, p. 2Source ↗
Genotox: in vitro mammalian
Not conducted (not applicable to a biologic protein)
“Genetic toxicity studies were not applicable for this therapeutic biologic protein.”
✓ VerifiedFDA pharmacology/toxicology review, p. 2Source ↗
Genotox: in vivo
Not conducted (not applicable to a biologic protein)
“Genetic toxicity studies were not applicable for this therapeutic biologic protein.”
✓ VerifiedFDA pharmacology/toxicology review, p. 2Source ↗
Carcinogenicity model
Not conducted; no related findings in 6-month monkey study and rodent study not technically feasible
“The need for a carcinogenicity study was discussed with the Executive Carcinogenicity Assessment Committee and it was concluded that a carcinogenicity study was not required given the lack of related findings in the 6-month toxicology study in monkeys and since conduct of a study in rodents did not appear to be technically feasible.”
✓ VerifiedFDA pharmacology/toxicology review, p. 2Source ↗
Carcinogenicity timing
Not required (ECAC)
“The need for a carcinogenicity study was discussed with the Executive Carcinogenicity Assessment Committee and it was concluded that a carcinogenicity study was not required given the lack of related findings in the 6-month toxicology study in monkeys and since conduct of a study in rodents did not appear to be technically feasible.”
✓ VerifiedFDA pharmacology/toxicology review, p. 2Source ↗
hERG / QT
No treatment-related effects on heart rate or ECG in chronic monkey toxicity study
“There were no treatment-related effects on heart rate or ECG parameters.”
✓ VerifiedFDA pharmacology/toxicology review, p. 62Source ↗