Neurocrine, Voyager Parkinson’s Phase 1 at American Academy of Neurology

• Results Confirm the Posterior Trajectory as an Additional Surgical Delivery Route for VY-AADC in Patients with Parkinson’s Disease

• Treatment with VY-AADC Improved Good ON Time (ON Time Without Troublesome Dyskinesia) by 1.7 Hours and Reduced OFF Time by 2.2 Hours at 12 Months in Patients with Parkinson’s Disease

Neurocrine Biosciences, Inc. (NASDAQ: NBIX) and Voyager Therapeutics, Inc. (NASDAQ: VYGR) today announced Phase I trial results for VY-AADC from eight patients with Parkinson’s disease who participated in the open-label trial to evaluate the safety and efficacy of VY-AADC and to further assess the posterior (i.e., from the back of the head) surgical delivery approach. These Phase I results are being presented today as a poster presentation at the 2019 American Academy of Neurology (AAN) Annual Meeting. Parkinson’s disease is a chronic, progressive and debilitating neurodegenerative disorder that affects approximately one million people in the U.S.¹

Treatment with VY-AADC improved good ON time (ON time without troublesome dyskinesia) by 1.7 hours from baseline and reduced OFF time by 2.2 hours at 12 months from baseline in patients with Parkinson’s disease. Exploratory analyses in four of the eight patients with low or no dyskinesia or absence of impulse control disorder (ICD) at baseline demonstrated a greater improvement in motor function including a 3.2-hour improvement in good ON time from baseline to 12 months. Infusions of VY-AADC were well tolerated with no serious adverse events (SAEs) reported. These Phase I results show that the posterior trajectory is an additional surgical delivery route in patients with Parkinson’s disease.

“The results from this Phase I trial in patients with Parkinson’s disease provide further evidence that VY-AADC administration can allow neurons in the brain to convert levodopa to dopamine and improve motor function,” said Eiry Roberts, M.D., Chief Medical Officer at Neurocrine Biosciences. “The results from this trial confirm previous data from a separate, ongoing Phase I study demonstrating that increased coverage of the putamen with VY-AADC leads to an increase in AADC enzyme activity and improvements in motor function and quality of life in patients with Parkinson’s disease – with less need for oral levodopa medication.”

https://www.marketscreener.com/VOYAGER-THERAPEUTICS-INC-24872703/news/Neurocrine-Biosciences-and-Voyager-Therapeutics-Announce-Phase-I-Results-for-VY-AADC-in-Patients-wit-28540816/