No relevant species; in vitro and syngeneic mouse surrogate CAR-T only
“Since the anti-CD19 scFv utilised for KTE-X19 does only recognise human CD19, a murine surrogate model was engineered for non-clinical proof-of-concept studies in immune competent mice.”
scFv recognizes only human CD19; no relevant animal model
“Similar as the pharmacology evaluation, also the non-clinical safety evaluation of KTE-X19 has been severely limited due to the lack of a relevant animal model.”
Yes: anti-murine CD19 CAR (1D3 scFv) T cells in syngeneic lymphoma mice
“This surrogate model used an anti-murine CD19 CAR construct that was similar to KTE-X19 with the exception of the scFv, which has been derived from the 1D3 mAb recognizing murine CD19.”
None; no GLP toxicology studies (no relevant animal model)
“Similar as the pharmacology evaluation, also the non-clinical safety evaluation of KTE-X19 has been severely limited due to the lack of a relevant animal model. Therefore, no GLP-compliant formal toxicology studies were performed.”
Not conducted; acceptable given product characteristics and 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 ↗
Species: carcinogenicity
Not conducted
“No carcinogencity/tumorigenicity studies were conducted.”
✓ VerifiedFDA pharmacology/toxicology review, p. 6Source ↗
Surrogate used in
Yes: anti-murine CD19 CAR (1D3 scFv) T cells
“This surrogate model used an anti-murine CD19 CAR construct that was similar to KTE-X19 with the exception of the scFv, which has been derived from the 1D3 mAb recognizing murine CD19.”