The m⁶A Modification in Neurodegenerative Disease: A Cellular Perspective

N6-methyladenosine (m⁶A) is the most abundant internal RNA modification in eukaryotes and plays a critical role in gene expression regulation by influencing RNA stability, splicing, nuclear export, and translation. Emerging evidence suggests that dysregulation of m⁶A contributes to neuroinflammation, neurotoxicity, and synaptic dysfunction-key features of neurodegenerative diseases. This review aims to examine the role of m6A modification in neurodegenerative diseases from a cell-type-specific perspective. We systematically reviewed recent studies investigating m⁶A modifications in neurons and glial cells. Data from transcriptomic, epitranscriptomic, and functional studies were analyzed to understand how m⁶A dynamics influence disease-related processes. Findings indicate that m⁶A modifications regulate neuroinflammation and immune responses in microglia, modulate astrocytic support functions, affect myelination through oligodendrocytes, and alter m⁶A patterns in neurons, impacting synaptic plasticity, stress responses, and neuronal survival. These cell-type-specific roles of m⁶A contribute to the progression of neurodegenerative diseases such as Alzheimer's disease (AD), Parkinson's disease (PD), and Amyotrophic lateral sclerosis (ALS). Understanding m⁶A-modulated mechanisms in specific neural cell types may facilitate the development of targeted interventions for neurodegenerative diseases.