Not conducted (classical); vector integration site analysis in dog and NHP liver instead
“Based on the IS profile, genotoxicity from vector integration appears to be a low risk.”
✓ VerifiedFDA pharmacology/toxicology review, p. 39Source ↗
Carcinogenicity
Not conducted (not warranted given product characteristics, BD/tox data, population)
“Studies to evaluate the safety pharmacology, developmental and reproductive toxicity, and carcinogenicity/tumorigenicity of BEQVEZ were not conducted.”
✓ VerifiedFDA pharmacology/toxicology review, p. 3Source ↗
Reproductive & developmental
Not conducted (male-only population); rabbit semen shedding/germline study only
“This reviewer agrees that the omission of dedicated embryo-fetal development studies and pre- and postnatal development studies is acceptable.”
✓ VerifiedFDA pharmacology/toxicology review, p. 20Source ↗
Safety pharmacology
Not conducted
“No safety pharmacology studies with BEQVEZ were conducted.”
✓ VerifiedFDA pharmacology/toxicology review, p. 19Source ↗
Genotox: Ames
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.
Genotox: in vitro mammalian
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.
Genotox: in vivo
Vector integration site analysis in NHP liver: no clonal expansion; genotoxicity from integration judged low risk
“The number of detected IS in the liver was broadly similar or declined between interim and terminal time points, suggesting an absence of clonal expansion. Although IS were detected in the vicinity of cancer genes, these genes were not identified as vector CIS.”
✓ VerifiedFDA pharmacology/toxicology review, p. 39Source ↗
Carcinogenicity model
Not conducted; 2-year NHP vector integration study showed no hepatocellular hyperplasia or carcinoma
“In a 2-year vector integration study in NHPs administered 5 × 1012 vg/kg, there was no indication that integration of vector DNA into host cell DNA resulted in altered liver function, hepatocellular hyperplasia or carcinoma.”
✓ VerifiedFDA pharmacology/toxicology review, p. 3Source ↗
Carcinogenicity timing
Not conducted: not warranted (product characteristics, biodistribution and toxicology results)
“Studies to evaluate the safety pharmacology, developmental and reproductive toxicity, and carcinogenicity/tumorigenicity of BEQVEZ were not conducted. These studies are not warranted based on the product characteristics, results from the biodistribution and toxicology studies”
✓ VerifiedFDA pharmacology/toxicology review, p. 3Source ↗
hERG / QT
No safety pharmacology studies conducted
“No safety pharmacology studies with BEQVEZ were conducted.”
✓ VerifiedFDA pharmacology/toxicology review, p. 19Source ↗
betibeglogene autotemcel · HBB T87Q (LVV, ex vivo HSC)
Insertional mutagenesis assessed instead of standard genotox: in vitro immortalization assay (low potential) and integration site analysis (no clonal dominance)