Monkey 9-month IT NOAEL 12 mg Q2W (neurological signs at 35 mg); ~1.2-fold margin by CSF-volume scaling; mouse platelet decreases, no NOAEL
“Based on neurological signs in the 9-month study, the NOAEL for IT administration of tofersen in cynomolgus monkey was 12 mg every 2 weeks, resulting in plasma Cmax and AUC0-24h of 4840 ng/mL and 30,000 µg·h/mL, respectively.”