Clinical Data
In Phase 2 and the open-label extension of the MoveDMD trial, a preservation of muscle function and slowing of DMD disease progression was seen in boys treated with edasalonexent compared to the rates of change during the control period prior to receiving edasalonexent. Through 60 weeks of treatment, the 100 mg/kg/day treatment group showed consistent and clinically meaningful improvements in rates of decline compared to rates of change during the control period across all four assessments of muscle function: the three timed function tests (10-meter walk/run, 4-stair climb and time to stand), as well as the North Star Ambulatory Assessment (NSAA), an integrated global assessment of muscle function. Control period changes were measured prior to boys receiving edasalonexent, either prior to Phase 2 or during Phase 2 prior to treatment in the open-label extension for those in the placebo group, for time periods averaging 39 weeks. In the 100 mg/kg/day treatment group, 16 boys commenced edasalonexent either at the beginning of Phase 2 or at the beginning of the open-label extension. At the time of this most recent open-label extension data analysis on functional assessments, all 13 boys continuing to participate had received 100 mg/kg/day for 48 weeks and 8 had reached 60 weeks of 100 mg/kg/day edasalonexent treatment.Additional supportive measures of muscle health also reinforce positive edasalonexent treatment effects in the 100 mg/kg/day treatment group. Four muscle enzymes (creatine kinase, alanine aminotransferase, aspartate aminotransferase and lactate dehydrogenase) were significantly decreased compared to baseline following edasalonexent treatment at 12 weeks and later time points through 60 weeks (p<0.05), consistent with the ability to slow muscle degeneration and improve muscle integrity. Biomarker results showed that CRP was significantly decreased with edasalonexent at 12, 24, 36 and 48 weeks compared to baseline in the 100 mg/kg/day treatment group (p≤0.001). CRP is a well-characterized blood test marker that provides a global assessment of inflammation, and CRP is elevated in boys affected by DMD. The significant decrease observed in CRP supports the biological activity of NF-kB inhibition by edasalonexent treatment decreasing inflammation.