Not conducted (recombinant protein not expected to interact with DNA)
“Genotoxicity testing was not performed. The product is a recombinant IgG2 protein of naturally occurring amino acids and is not expected to react with DNA or other chromosomal material.”
✓ VerifiedFDA multi-discipline review, p. 603Source ↗
Carcinogenicity
Rat carcinogenicity study: 2/54 osteosarcomas in high-dose males (19x), not significant; judged unlikely to raise human osteosarcoma risk
“A low incidence of osteosarcoma (2/54) was observed in high dose males at 19x human exposure. However, the lack of statistical significance of this finding and the large exposure multiple suggests that romosozumab is unlikely to increase the human risk of osteosarcoma.”
✓ VerifiedFDA multi-discipline review, p. 38Source ↗
Reproductive & developmental
Rat FEED, EFD and PPND: reduced 6th cervical vertebra ventral processes at 100-300 mg/kg (17-56x)
“Findings in the definitive FEED and EFD studies included reduced ventral processes of the 6th cervical vertebrae at doses of 100 and 300 mg/kg (17-56x human exposure).”
✓ VerifiedFDA multi-discipline review, p. 38Source ↗
Safety pharmacology
Single-dose rat neurobehavioral and monkey cardiovascular/respiratory studies
“Safety pharmacology endpoints were evaluated in a single dose neurobehavioral study in rat and in a single dose combined cardiovascular/respiratory study in cynomolgus monkey.”