Neuren Phase 2 trial shows significant improvements in Phelan-McDermid syndrome

In This Article:

Highlights: 

  • Significant improvement was assessed by both clinicians and caregivers across multiple efficacy measures  

  • Improvements were consistently seen across clinically important aspects of Phelan-McDermid syndrome, including communication, behaviour, cognition/learning and socialisation 

  • Clinician and caregiver global efficacy measures showed a level of improvement typically considered clinically meaningful:

- Clinical Global Impression of Improvement (CGI-I) - mean score of 2.4, with 16 out of 18 children showing improvement assessed by clinicians

- Caregiver Overall Impression of Change (CIC) – mean score of 2.7, with 15 out of 18 children showing improvement assessed by caregivers

  • For 10 out of 14 efficacy endpoints, improvement from baseline on overall/total scores was statistically significant (Wilcoxon signed rank test p<0.05)  

  • NNZ-2591 was safe and well tolerated, with no clinically significant changes in laboratory values or other safety parameters during treatment 

MELBOURNE, Australia, Dec. 18, 2023 /PRNewswire/ -- Neuren Pharmaceuticals (ASX: NEU) today announced top-line results from its Phase 2 clinical trial of NNZ-2591 in children with Phelan-McDermid syndrome (PMS). Significant improvement was observed by both clinicians and caregivers from treatment, across multiple efficacy measures. Improvements were consistently seen across many of the core PMS characteristics. PMS has severe quality of life impacts for those living with the syndrome, as well as parents and siblings. There are no approved treatments for PMS despite its severely debilitating impact.

Neuren CEO Jon Pilcher commented "The strength and consistency of these results has exceeded our expectations and gives us high confidence as we strive to accelerate the development of a potential first therapy to address the overwhelming unmet medical need of PMS.  We are very grateful to all the people at the trial sites in the United States and in the PMS community who enabled this groundbreaking trial to be completed successfully."

Elizabeth Berry-Kravis, MD, PhD, Professor Department of Pediatrics at Rush University Medical Center in Chicago and an Investigator in the study, commented: "Although the Phase 2 trial was an open label study, I am very encouraged that both clinicians and caregivers observed pervasive improvements across multiple, clinically important features of PMS including communication, cognition, learning, socialisation and behaviour.  Improvements typically considered clinically meaningful were achieved in the clinician rated CGI-I as well as the caregiver rated CIC. I look forward to seeing this program advance to the next stage of development for the PMS community".