NeuroNOS Granted FDA Orphan Drug Designation for Phelan-McDermid Syndrome, a Neurodevelopmental Disorder Linked to Autism

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Beyond Air™
Beyond Air™

The FDA designation marks a significant milestone in the development of a novel treatment for a rare neurodevelopmental disorder

Plan to initiate first-in-human U.S. clinical trials of lead drug candidate for treating ASD in 2026

BOSTON, April 21, 2025 (GLOBE NEWSWIRE) -- NeuroNOS, a biopharmaceutical company focused on developing treatments for autism and Alzheimer disorders, and a subsidiary of Beyond Air (NASDAQ: XAIR), today announced that the U.S. Food and Drug Administration (FDA) has granted Orphan Drug Designation (ODD) to its lead investigational therapy, BA-102, for the treatment of Phelan-McDermid Syndrome (PMS), a syndrome associated with Autism Spectrum Disorder (ASD). The company is on track to initiate first-in-human clinical trials for ASD in the United States in 2026.

PMS is a rare genetic disorder most commonly caused by deletions or mutations affecting the SHANK3 gene leading to a range of symptoms, including global developmental delay, intellectual disability, severe speech impairments, and in many cases features of ASD. Currently, there are no FDA-approved treatments specifically indicated for PMS.

“Receiving orphan drug designation from the FDA is a significant step forward for this autism program, as well as our broader mission to bring targeted therapies to individuals and families affected by rare neurodevelopmental conditions,” said Amir Avniel, CEO of NeuroNOS. “By focusing on the genetic underpinnings of Phelan-McDermid Syndrome—a syndromic form of autism—we aim to address the root cause of symptoms and offer new hope where few options currently exist.”

ODD provides key development incentives, including seven years of market exclusivity upon approval, tax credits for qualified clinical trials, waiver of FDA application fees, and access to FDA protocol assistance.

“Phelan-McDermid Syndrome represents a critical unmet medical need,” said Prof. Haitham Amal, CSO of NeuroNOS. “We are committed to working closely with the FDA, patient advocacy groups, scientific foundations, and clinical investigators to accelerate development of a therapy that could meaningfully improve quality of life for those living with this challenging genetic condition.”

About Phelan-McDermid Syndrome

Phelan-McDermid Syndrome (PMS) is a rare neurodevelopmental disorder caused by deletions or mutations in the terminal region of chromosome 22, most often affecting the SHANK3 gene. PMS is characterized by intellectual disability, severe speech delays, motor impairments, hypotonia, and autism spectrum behaviors. It is considered a syndromic form of autism, in contrast to idiopathic autism, due to its clear genetic etiology and associated physical and neurological symptoms.