Orphazyme A/S, a biopharmaceutical company dedicated to developing treatments for patients living with rare diseases, today announced encouraging top-line results for its clinical Phase II/III trial with orally administered arimoclomol for the treatment of patients with Niemann-Pick disease Type C (NPC).

The trial was a multi-center, prospective, double-blinded, placebo-controlled interventional study with a 12-month duration. In total, 50 patients were enrolled in the EU and US. The purpose of the trial was to assess the efficacy and safety of arimoclomol, compared to placebo, in the treatment of NPC, administered in addition to the patient’s standard-of-care. The primary endpoints, 5-domain NPC-CSS and Clinical Global Impression of Improvement (CGI-I), evaluated the treatment difference between the arimoclomol-treated and the placebo group after 12 months of treatment.

Overall, baseline characteristics were well-balanced across treatment arms. Arimoclomol was well-tolerated. The overall incidence of adverse events (AEs) was similar for arimoclomol (85.7%) and placebo (81.3%). Serious AEs occurred less frequently in the arimoclomol group (14.3%) compared to placebo (37.5%). The top-line data demonstrated a 74% reduction in progression on the primary endpoint, corroborated by consistent benefit across sub-populations. Placebo progression rates on the CGI-I were lower than expected impeding the ability to show a positive effect.