Not conducted (traditional); vector integration site analysis performed instead
“Traditional genotoxicity studies were not conducted using KTE-X19, however, given the use of a murine γ-retroviral vector to stably integrate the anti-CD19 CAR into the T cell genome, a risk associated with insertional mutagenesis exists.”
✓ VerifiedFDA pharmacology/toxicology review, p. 5Source ↗
Carcinogenicity
Not conducted
“No carcinogencity/tumorigenicity studies were conducted.”
✓ VerifiedFDA pharmacology/toxicology review, p. 6Source ↗
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
Integration site analysis using axicabtagene ciloleucel, plus published literature and ZUMA-2 clinical data
“In addition to an updated discussion of published literature and clinical trial ZUMA-2, the applicant provided summary data from an updated integration analyses conducted using axicabtagene ciloleucel (Module 4.2.3.3.2).”
✓ VerifiedFDA pharmacology/toxicology review, p. 5Source ↗
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
Not conducted (product characteristics, safety profile)
“No animal reproductive and developmental toxicity studies were conducted with KTE-X19, which is acceptable based on the product characteristics and safety profile.”
✓ VerifiedFDA summary basis for approval, p. 12Source ↗
Safety pharmacology
Not conducted
“No secondary pharmacodynamics studies, safety pharmacology studies and pharmacodynamic drug interaction studies were conducted.”
Not conducted; insertional mutagenesis risk noted from γ-retroviral vector integration
“Traditional genotoxicity studies were not conducted using KTE-X19, however, given the use of a murine γ-retroviral vector to stably integrate the anti-CD19 CAR into the T cell genome, a risk associated with insertional mutagenesis exists.”
✓ VerifiedFDA pharmacology/toxicology review, p. 5Source ↗
Genotox: in vitro mammalian
Not conducted
“Traditional genotoxicity studies were not conducted using KTE-X19, however, given the use of a murine γ-retroviral vector to stably integrate the anti-CD19 CAR into the T cell genome, a risk associated with insertional mutagenesis exists.”
✓ VerifiedFDA pharmacology/toxicology review, p. 5Source ↗
Genotox: in vivo
Not conducted
“Traditional genotoxicity studies were not conducted using KTE-X19, however, given the use of a murine γ-retroviral vector to stably integrate the anti-CD19 CAR into the T cell genome, a risk associated with insertional mutagenesis exists.”
✓ VerifiedFDA pharmacology/toxicology review, p. 5Source ↗
Carcinogenicity model
Not conducted; acceptable based on product characteristics, safety profile and indication
“Traditional in vitro and in vivo genotoxicity and carcinogenicity/tumorigenicity assessments of KTE-X19 were not conducted which is acceptable based on the product characteristics, safety profile and indication.”
✓ VerifiedFDA pharmacology/toxicology review, p. 2Source ↗
Carcinogenicity timing
Not required (acceptable based on product characteristics, safety profile and indication)
“Traditional in vitro and in vivo genotoxicity and carcinogenicity/tumorigenicity assessments of KTE-X19 were not conducted which is acceptable based on the product characteristics, safety profile and indication.”
✓ VerifiedFDA pharmacology/toxicology review, p. 2Source ↗
hERG / QT
Not conducted (no safety pharmacology studies)
“No safety pharmacology studies were conducted.”
✓ VerifiedFDA pharmacology/toxicology review, p. 5Source ↗