“Genetic toxicology studies are not applicable to monoclonal antibodies and were not conducted with lebrikizumab based on ICH S6 guidance.”
✓ VerifiedFDA multi-discipline review, p. 62Source ↗
Carcinogenicity
Not conducted; weight-of-evidence (literature, no proliferative lesions or immunosuppression in 9-month monkey study) indicates low potential
“There was no evidence of tissue proliferation (i.e., hyperplasia, pre-neoplastic lesions) or immunosuppression in the 9-month intravenous toxicology study in cynomolgus monkeys that received lebrikizumab doses up to 25 mg/kg/week. The overall data suggest that lebrikizumab has low carcinogenic potential.”
✓ VerifiedFDA multi-discipline review, p. 51Source ↗
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 EFD and PPND: no adverse effects; NOAEL 150/50 mg/kg/week (loading/maintenance); crossed placenta
“No embryofetal toxicity or malformations, or test article related effects on morphological, functional, or immunological development were observed in the infants from birth through 6 months of age. The NOAEL for maternal and developmental toxicity was 150/50 mg/kg/week (loading/maintenance doses).”
✓ VerifiedFDA multi-discipline review, p. 51Source ↗
Safety pharmacology
Incorporated into repeat-dose monkey studies; no cardiovascular, respiratory or behavioral effects up to 25 mg/kg/week
“Repeated administration of lebrikizumab up to 25 mg/kg/week IV or SC had no adverse effects on the evaluated parameters for cardiovascular, respiratory or behavioral effects.”
✓ VerifiedFDA multi-discipline review, p. 50Source ↗
Genotox: Ames
Not conducted (ICH S6)
“Genetic toxicology studies are not applicable to monoclonal antibodies and were not conducted with lebrikizumab based on ICH S6 guidance.”
✓ VerifiedFDA multi-discipline review, p. 62Source ↗
Genotox: in vitro mammalian
Not conducted (ICH S6)
“Genetic toxicology studies are not applicable to monoclonal antibodies and were not conducted with lebrikizumab based on ICH S6 guidance.”
✓ VerifiedFDA multi-discipline review, p. 62Source ↗
Genotox: in vivo
Not conducted (ICH S6)
“Genetic toxicology studies are not applicable to monoclonal antibodies and were not conducted with lebrikizumab based on ICH S6 guidance.”
✓ VerifiedFDA multi-discipline review, p. 62Source ↗
Carcinogenicity model
Not conducted; weight of evidence indicates low carcinogenic potential
“The overall data suggest that lebrikizumab has low carcinogenic potential. Further studies to assess carcinogenic risk are considered unwarranted.”
✓ VerifiedFDA multi-discipline review, p. 51Source ↗
Carcinogenicity timing
Not required: further carcinogenicity studies considered unwarranted (weight of evidence)
“The overall data suggest that lebrikizumab has low carcinogenic potential. Further studies to assess carcinogenic risk are considered unwarranted.”
✓ VerifiedFDA multi-discipline review, p. 51Source ↗
hERG / QT
No hERG inhibition up to 6.0 mg/mL in vitro; IC50 not determinable
“No inhibitory effects on the hERG ion channel current were observed compared to vehicle control at doses up to 6.0 mg/mL in this in vitro hERG assay. An IC50 value could not be determined.”
✓ VerifiedFDA multi-discipline review, p. 52Source ↗