Conducted; negative (Ames, CHO chromosomal aberration, mouse micronucleus)
“ISIS 396443 was negative in an adequately conducted standard battery of in vitro (Ames and chromosomal aberration in CHO) and in vivo (mouse micronucleus) assays.”
✓ VerifiedFDA pharmacology/toxicology review, p. 88Source ↗
Carcinogenicity
Not conducted pre-approval (IT route infeasible); SC carcinogenicity study as postmarketing requirement
“Carcinogenicity studies have not been conducted with nusinersen at this time. The Division has recommended that a carcinogenicity study be conducted after approval.”
✓ VerifiedFDA pharmacology/toxicology review, p. 2Source ↗
Reproductive & developmental
Mouse fertility/EFD and rabbit EFD (SC): no clear toxicity; PPND ongoing as PMR
“No clear evidence of reproductive or developmental toxicity was seen in mouse and rabbit studies, and ISIS 396443 was negative for genotoxicity in a standard battery of in vitro and in vivo assays.”
✓ VerifiedFDA pharmacology/toxicology review, p. 7Source ↗
Safety pharmacology
Rat IT-infusion respiratory/CV study; CNS endpoints incorporated into monkey IT tox studies
“Safety pharmacology consisted of a respiratory and cardiovascular safety pharmacology study in rats treated by continuous intrathecal (IT) infusion.”
✓ VerifiedFDA pharmacology/toxicology review, p. 71Source ↗