ArticleResearch square2025
Inhibition of N6-Methyladenosine Accumulation by Targeting METTL3 Mitigates Tau Pathology and Cognitive Decline in Alzheimer's Disease.
Article in Research square, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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13 authors.
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Abstract
Dysregulation of N6-methyladenosine (m6A) modification of RNA has emerged as a novel feature of Alzheimer's disease (AD). Here, we investigate the relationship between m6A modification and AD pathology, and the therapeutic potential of modulating excessive m6A via its "writer" methyltransferase METTL3 in a humanized P301S tau transgenic mouse model of AD (PS19). We observed significantly elevated m6A levels in human post-mortem AD frontal cortex tissue compared to healthy controls, which positively correlated with hyperphosphorylated tau and amyloid-β (Aβ) deposition. These effects were recapitulated in the PS19 tau mice model of AD. Importantly, treatment of PS19 mice with the METTL3 inhibitor STM2457 reduced excessive m6A, alleviated tau pathology, and attenuated neurodegeneration. Behavioral assessments further demonstrated that STM2457-treated PS19 mice exhibited significantly improved learning and memory relative to untreated PS19 mice. Our results identify m6A as a critical contributor to AD pathogenesis and demonstrate that pharmacological inhibition of METTL3 represents a promising therapeutic strategy to improve cognition in AD.
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