Bionomics Limited announced positive topline results from its Phase 2b ATTUNE trial of BNC210 for the treatment of PTSD. ATTUNE is a double-blind, placebo-controlled Phase 2b trial conducted in a total of 34 sites in the United States and the United Kingdom, with 212 enrolled patients, randomized 1:1 to receive either twice daily 900 mg BNC210 as a monotherapy (n=106) or placebo (n=106) for 12 weeks. The trial met its primary endpoint of change in Clinician-Administered PTSD Scale for DSM-5 (CAPS-5) total symptom severity score from baseline to Week 12 (p=0.048).

A statistically significant change in CAPS-5 score was also observed at Week 4 (p=0.015) and at Week 8 (p=0.014). Treatment with BNC210 also showed statistically significant improvement both in clinician-administered and patient self-reporting in two of the secondary endpoints of the trial. Specifically, BNC210 led to significant improvements at Week 12 in depressive symptoms (p=0.040) and sleep (p=0.041) as measured by Montgomery-Åsberg Depression Rating Scale (MADRS) and Insomnia Severity Index (ISI), respectively.

BNC210 also showed signals and trends across visits in the other secondary endpoints including the clinician and patient global impression - symptom severity (CGI-S, PGI-S) and the Sheehan Disability Scale (SDS). Treatment with 900 mg twice daily BNC210 had a favorable safety and tolerability profile. The most common (>5% of subjects in each group) reported adverse events, including headache, nausea, and fatigue, which were consistent with previous studies with BNC210.

A hepatic enzyme increase was observed in 14 (13.3%) patients treated with BNC210 vs 2 (0.19%) in the placebo group; the abnormal results were not associated with hepatic injury and in most cases were resolved without drug discontinuation. Additionally, the Company recently held what it believes was a successful, Phase 3-enabling End-of-Phase 2 meeting with the FDA for the advancement of BNC210 for the acute treatment of social anxiety disorder into registrational studies and is awaiting receipt of the formal meeting minutes. The company will discuss the topline ATTUNE study results on the webcast at 8:00am EST and is planning to advance BNC210 for the treatment of PTSD into registrational studies.