Researchers from Voyager Therapeutics Inc. presented preclinical activity data of VY-1706, a blood-brain barrier (BBB)-penetrant gene therapy comprising an adeno-associated virus serotype 9 capsid (AAV9-C9P39) vector encoding primary artificial microRNA (pri-amiRNA) consisting of short-interfering RNA (siRNA) targeting human microtubule-associated protein tau (MAPT) protein.

Researchers from Sanofi SA reported the preclinical characterization of SAR-446159 (ABL-301), a bispecific antibody construct comprising an antibody targeting α-synuclein fused to an engineered antibody fragment that targets IGF-1R and functions as a blood-brain barrier (BBB) shuttle, known as the Grabody-B platform.

BDNF is the brain’s most abundant neurotrophic factor, playing a key role in neuronal survival and synaptic plasticity through the activation of the transcription factor CREB, which is essential for driving beneficial effects in neurons. CREB is downregulated in Parkinson’s disease, Huntington’s disease, frontotemporal dementia, Alzheimer’s disease and other neurodegenerative conditions.

The current treatment strategies for neurodegenerative diseases focus on targeting Aβ in Alzheimer’s disease (AD), α-synuclein aggregates in Parkinson’s disease (PD) and anti-tau therapies, which are primarily used in AD but are also being explored for PD. At the 2025 International Conference of Alzheimer’s & Parkinson’s Disease and Related Neurological Disorders, Aditya Iyer, senior RD scientist from Amyl Therapeutics Srl, presented data on an option which could potentially serve as a pan-amyloid therapeutic.

Nissan Chemical Corporation and Sanwa Kagaku Kenkyusho Co. Ltd. (SKK) have entered an agreement to codevelop SK-2407/SN-001 for the treatment of dentatorubral-pallidoluysian atrophy (DRPLA) in Japan.