Mutagenic in Ames test and clastogenic in in vitro human lymphocyte micronucleus assay
“Treosulfan was mutagenic in the in vitro bacterial mutagenicity assay (Ames test) and clastogenic in the in vitro micronucleus assay in human lymphocytes.”
“Dedicated carcinogenicity or fertility studies were not conducted with treosulfan, as they are not needed to support the use of a drug intended to treat patients with advanced cancer.”
✓ VerifiedFDA multi-discipline review, p. 145Source ↗
Reproductive & developmental
No dedicated studies; 7-month rat study: dose-dependent male and female fertility impairment
“A 7-month chronic-dose study conducted in Wistar rats revealed dose-dependent fertility impairment in males and females (i.e. arrested spermatogenesis and absent corpora lutea and follicles).”
✓ VerifiedFDA multi-discipline review, p. 145Source ↗
Safety pharmacology
No effect on hERG tail current (IC50 >5000 µM)
“Treosulfan had no effect on hERG tail current (IC50 > 5000 μM).”
✓ VerifiedFDA multi-discipline review, p. 150Source ↗
Not genotoxic overall: Ames negative; in vitro chromosome aberration positive without (not with) metabolic activation; rat micronucleus and comet negative