Not conducted (antibodies unable to interact with genetic material)
“No genotoxicity studies of satralizumab were conducted because antibodies are generally unable to interact with genetic material.”
✓ VerifiedFDA pharmacology/toxicology review, p. 41Source ↗
Carcinogenicity
Not conducted (no rodent IL-6R binding; mouse homolog not feasible); human malignancy risk unknown
“Carcinogenicity studies of satralizumab were not conducted because satralizumab does not bind to rat or mouse IL-6R, and the use of a mouse homolog antibody was determined not to be feasible because of immunogenicity.”
✓ VerifiedFDA pharmacology/toxicology review, p. 41Source ↗
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 (0, 2, 50 mg/kg/week SC): dose-dependent reduction in infant antibody responses to antigen challenge
“In the ePPND study, administration of satralizumab (0, 2, and 50 mg/kg/week SC) to pregnant females resulted in a dose-dependent reduction in the antibody responses to antigenic challenge in infants.”
✓ VerifiedFDA pharmacology/toxicology review, p. 7Source ↗
Safety pharmacology
Incorporated into pivotal monkey toxicology studies
“No stand-alone safety pharmacology studies of satralizumab were submitted. Safety pharmacology assessments were incorporated into the pivotal toxicology studies of satralizumab in monkey.”
✓ VerifiedFDA pharmacology/toxicology review, p. 27Source ↗
Genotox: Ames
Not conducted (antibodies unable to interact with genetic material)
“No genotoxicity studies of satralizumab were conducted because antibodies are generally unable to interact with genetic material.”
✓ VerifiedFDA pharmacology/toxicology review, p. 41Source ↗
Genotox: in vitro mammalian
Not conducted (antibodies unable to interact with genetic material)
“No genotoxicity studies of satralizumab were conducted because antibodies are generally unable to interact with genetic material.”
✓ VerifiedFDA pharmacology/toxicology review, p. 41Source ↗
Genotox: in vivo
Not conducted (antibodies unable to interact with genetic material)
“No genotoxicity studies of satralizumab were conducted because antibodies are generally unable to interact with genetic material.”
✓ VerifiedFDA pharmacology/toxicology review, p. 41Source ↗
Carcinogenicity model
Not conducted (no rodent IL-6R binding; mouse homolog not feasible due to immunogenicity)
“Carcinogenicity studies of satralizumab were not conducted because satralizumab does not bind to rat or mouse IL-6R, and the use of a mouse homolog antibody was determined not to be feasible because of immunogenicity.”
✓ VerifiedFDA pharmacology/toxicology review, p. 41Source ↗
Carcinogenicity timing
Not required (Division agreement, June 2016)
“The Division informed the sponsor that carcinogenicity studies of satralizumab would not be required to support a BLA (see email of June 14, 2016).”
✓ VerifiedFDA pharmacology/toxicology review, p. 41Source ↗
hERG / QT
No hERG assay; no ECG, blood pressure, respiratory or CNS effects in monkeys at 2-50 mg/kg weekly SC for 4 or 26 weeks
“No significant effects on cardiovascular (electrocardiogram (ECG), blood pressure), respiratory, or central nervous system functions were shown following subcutaneous administration of 2, 10 and 50 mg/kg satralizumab once weekly for 4 or 26 weeks with exposure levels providing acceptable margins to the clinical exposure.”