Currently, Retrotope has ongoing trials for RT001 in three of the four most common orphan neurodegenerative diseases— amyotrophic lateral sclerosis (ALS), progressive supranuclear palsy (PSP) and Friedreich’s ataxia (FA). The ALS and PSP trials are Phase II, while the FA trial is a Phase II/III potentially IND-enabling study, company president Anil Kumar said.