Target sequence 100% complementary to human and monkey TTR mRNA; 8 mismatches in rodents
“The target sequence of eplontersen and inotersen is 100 % complementary to human and Cynomolgus monkey TTR mRNA, whereas 8 mismatches in mice and rats preclude effective hybridisation and, hence, pharmacological activity in these animals.”
Yes: mouse-specific GalNAc ASO ION-1184986 in 26-week mouse and fertility/EFD studies
“A parallel group administered 10 mg/kg SC ION-1184986, the mouse-specific ASO, showed reduction of ~82% in hepatic TTR mRNA, compared to controls; no adverse effects were observed.”