Ames negative; polyploidy in human lymphocytes in vitro; negative in vivo rat bone marrow chromosome aberration assay
“Delgocitinib was not mutagenic in the Ames assay. Delgocitinib had the potential to induce polyploidy in human peripheral blood lymphocytes, but not chromosomal structural aberrations in vitro. Delgocitinib did not induce chromosomal aberrations (structural or numerical aberrations) in rat bone marrow cells in vivo.”
Dermal mouse: no drug-related tumors; 2-year oral rat: benign thymoma in females at 30 mg/kg/day
“No drug-related neoplastic findings were noted at topical doses up to 5% delgocitinib ointment. In the 2-year oral carcinogenicity study in rats, increased incidence of benign thymoma was noted in females at 30 mg/kg/day”
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
Adverse effects only at higher doses in all reproductive studies; NOAELs established with acceptable margins
“Adverse effects were seen at higher doses in each of the reproductive and developmental toxicology studies, but a NOAEL was established in each study with acceptable margins of exposures.”
No cardiovascular, respiratory or neurological effects; no remarkable hERG inhibition at clinically relevant concentrations
“Delgocitinib had no effects on cardiovascular, respiratory, or neurological parameters at clinically relevant doses. Delgocitinib had no remarkable inhibitory effect on the human ether-à-go-go-related gene (hERG) current at clinically relevant concentrations.”
“Delgocitinib was not mutagenic in the Ames assay. Delgocitinib had the potential to induce polyploidy in human peripheral blood lymphocytes, but not chromosomal structural aberrations in vitro.”
Human lymphocyte chromosomal aberration: polyploidy induced, no structural aberrations
“Delgocitinib was not mutagenic in the Ames assay. Delgocitinib had the potential to induce polyploidy in human peripheral blood lymphocytes, but not chromosomal structural aberrations in vitro.”
Rat bone marrow chromosomal aberration and hairless mouse skin micronucleus: negative
“Delgocitinib did not induce chromosomal aberrations (structural or numerical aberrations) in rat bone marrow cells in vivo. Delgocitinib ointment (5%) did not induce micronuclei in the epidermal cells of hairless mice.”
104-week dermal mouse (negative); 2-year oral rat (benign thymoma in females at 30 mg/kg/day)
“In the dermal carcinogenicity study in mice, delgocitinib ointment (1%, 3% and 5%) was administered once daily for 104 weeks. No drug-related neoplastic findings were noted at topical doses up to 5% delgocitinib ointment. In the 2-year oral carcinogenicity study in rats, increased incidence of benign thymoma was noted in females at 30 mg/kg/day”
104-week dermal mouse and 2-year oral rat studies completed
“In the dermal carcinogenicity study in mice, delgocitinib ointment (1%, 3% and 5%) was administered once daily for 104 weeks. No drug-related neoplastic findings were noted at topical doses up to 5% delgocitinib ointment. In the 2-year oral carcinogenicity study in rats, increased incidence of benign thymoma was noted in females at 30 mg/kg/day”
No remarkable hERG inhibition at clinically relevant concentrations; no cardiovascular effects
“Delgocitinib had no effects on cardiovascular, respiratory, or neurological parameters at clinically relevant doses. Delgocitinib had no remarkable inhibitory effect on the human ether-à-go-go-related gene (hERG) current at clinically relevant concentrations.”
Not genotoxic overall: Ames negative; in vitro chromosome aberration positive without (not with) metabolic activation; rat micronucleus and comet negative