PTC Therapeutics Announces Topline Results from Vatiquinone MOVE-FA Registration-Directed Trial

PTC Therapeutics reported topline results from the MOVE-FA trial of vatiquinone in patients with Friedreich ataxia. The study did not meet its primary endpoint of statistically significant change in mFARS score at 72 weeks in the primary analysis population. However, vatiquinone treatment did demonstrate significant benefit on key disease subscales and secondary endpoints. In addition, in the population of subjects that completed the study protocol, significance was reached in the mFARS endpoint and several secondary endpoints. The MOVE-FA trial enrolled 146 pediatric and adult patients, the majority of which were under 18 years of age. The mean placebo corrected change in the mFARS score in the primary analysis population was 1.6 (p=0.14). Notably, there was significant benefit recorded in the bulbar and upright stability subscales (nominal p values of 0.044 and 0.021, respectively) which are regarded as reflective of key aspects of disease morbidity and predictive of loss of time to loss of ambulation. In addition, a statistically significant difference was recorded on the Modified Fatigue Scale, which captures one of the most impactful sources of disease morbidity (nominal p value of 0.025). On a prespecified sensitivity analysis of subjects who completed 72 weeks on assigned therapy, the placebo corrected difference was 2.31, which represents a 75% slowing in disease progression over 72 weeks. Overall, vatiquinone was demonstrated to be well tolerated, adding to the large volume of safety data collected in other pediatric clinical studies.

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