ArticleCells2025
PF-04691502, a PI3K/mTOR Dual Inhibitor, Ameliorates AD-like Pathology in a Mouse Model of AD.
Article in Cells, 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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Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder that significantly impacts the lives of patients and their families. The pathological features of AD include the accumulation of amyloid-β (Aβ) and Tau, which disrupt neuronal function and communication, ultimately leading to neuronal loss and brain atrophy. Efforts to understand the molecular mechanisms underlying these pathological changes have led to advancements in diagnostic techniques and potential therapeutic interventions. However, the complexity of AD necessitates further research to develop more effective treatments and, ideally, preventive measures. Extensive research suggests that diminishing mTOR signaling increases lifespan and health span across various species. Increased PI3K/mTOR signaling has been linked to the progression of AD pathology, leading to neuronal degeneration and impairments in cognitive function. In this study, we explored the therapeutic potential of PF-04691502, a dual PI3K/mTOR inhibitor, in Alzheimer's disease (AD)-like pathology using male and female B6.Cg-Tg(APPswe, PSEN1dE9)85Dbo/Mmjax mice (APP/PS1), a well-established transgenic model of AD. Eighteen-month-old APP/PS1 and wild-type mice received oral administration of PF-04691502 at a dose of 1 mg/kg for 12 weeks. Following the treatment period, spatial learning and memory were evaluated using the Morris water maze. Subsequently, the mice brains were collected for neuropathological and biochemical assessments. Our findings showed that PF-04691502 enhanced cognitive performance in APP/PS1 mice and significantly reduced insoluble Aβ accumulation in the brain. Mechanistically, these effects were associated with enhanced autophagy induction. Treatment with PF-04691502 increased the LC3-II/LC3-I ratio, upregulated Beclin-1, and elevated LAMP-2 levels, indicative of stimulated autophagosome formation and lysosomal activity. Overall, these preclinical results suggest that PF-04691502 holds promise as a potential therapeutic agent for AD and other aging-related neurodegenerative diseases involving mTOR pathway dysregulation.
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