Negative in Ames, in vitro micronucleus, chromosomal aberration and rat bone marrow micronucleus assays (parent and AGI-69460)
“Vorasidenib and its major circulating metabolite, AGI-69460, were negative for genotoxicity in a full battery of tests including an in vitro bacterial reverse mutation (Ames) assay, an in vitro micronucleus assay in human lymphocytes, a chromosomal aberration assay, and an in vivo bone marrow micronucleus assay in rats.”
✓ VerifiedFDA multi-discipline review, p. 45Source ↗
Carcinogenicity
Not conducted; mouse and rat carcinogenicity studies are postmarketing requirements
“Two post-marketing requirements (PMRs) to conduct carcinogenicity studies in mice and rats were communicated to the Applicant.”
✓ VerifiedFDA multi-discipline review, p. 45Source ↗
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
Rat EFD: early resorptions and kidney/testis visceral malformations at maternally toxic 75 mg/kg/day (~170x human AUC)
“Embryo-fetal toxicity (higher incidence of early resorptions, and visceral malformations of kidney and testes) occurred in rats at the maternally toxic dose of 75 mg/kg/day (approximately 170 times the human exposure based on the AUC at the highest recommended dose).”
Assessed within repeat-dose studies; marginal 32 msec QTc prolongation in a single monkey at non-tolerable 40 mg/kg/day
“Safety pharmacology assessments conducted in the repeat-dose general toxicity studies resulted in marginal prolongation of the corrected QT interval (QTc) of 32 msec in a single male monkey administered the non-tolerable dose of 40 mg/kg/day.”
✓ VerifiedFDA multi-discipline review, p. 43Source ↗
Genotox: Ames
Negative (vorasidenib and metabolite AGI-69460)
“Vorasidenib and its major circulating metabolite, AGI-69460, were negative for genotoxicity in a full battery of tests including an in vitro bacterial reverse mutation (Ames) assay, an in vitro micronucleus assay in human lymphocytes, a chromosomal aberration assay, and an in vivo bone marrow micronucleus assay in rats.”
✓ VerifiedFDA multi-discipline review, p. 45Source ↗
Genotox: in vitro mammalian
Negative: in vitro micronucleus in human lymphocytes and chromosomal aberration assay
“Vorasidenib and its major circulating metabolite, AGI-69460, were negative for genotoxicity in a full battery of tests including an in vitro bacterial reverse mutation (Ames) assay, an in vitro micronucleus assay in human lymphocytes, a chromosomal aberration assay, and an in vivo bone marrow micronucleus assay in rats.”
✓ VerifiedFDA multi-discipline review, p. 45Source ↗
Genotox: in vivo
Negative: rat bone marrow micronucleus
“Vorasidenib and its major circulating metabolite, AGI-69460, were negative for genotoxicity in a full battery of tests including an in vitro bacterial reverse mutation (Ames) assay, an in vitro micronucleus assay in human lymphocytes, a chromosomal aberration assay, and an in vivo bone marrow micronucleus assay in rats.”
✓ VerifiedFDA multi-discipline review, p. 45Source ↗
Carcinogenicity model
Not conducted pre-approval; rodent (mouse and rat) carcinogenicity studies required postmarketing
“Carcinogenicity studies in mice and rats are warranted to determine the risk of carcinogenicity from vorasidenib for chronic use given the life expectancy of the proposed patient population.”
✓ VerifiedFDA multi-discipline review, p. 80Source ↗
Carcinogenicity timing
Mouse and rat carcinogenicity studies not conducted before approval; postmarketing requirements
“Two post-marketing requirements (PMRs) to conduct carcinogenicity studies in mice and rats were communicated to the Applicant.”
✓ VerifiedFDA multi-discipline review, p. 45Source ↗
hERG / QT
hERG IC50 >30 µM, >3500-fold unbound human Cmax at 40 mg daily
“Based on the results from clinical study AG881-C-004, an IC50 value of > 30 µM for vorasidenib for hERG current inhibition is > 3500-fold greater than the unbound human steady-state Cmax at the proposed therapeutic dose of 40 mg daily of vorasidenib (Cmax = 133 ng/ml).”
Not genotoxic overall: Ames negative; in vitro chromosome aberration positive without (not with) metabolic activation; rat micronucleus and comet negative