Pterostilbene mitigates scopolamine-induced cognitive impairment by modulating cholinergic pathway and reducing...

Scopolamine, a muscarinic antagonist, induces cognitive impairment but remains pharmacologically challenging to address. While current therapies (eg., donepezil) target single pathways (eg., cholinergic), Pterostilbene (Pte), a natural compound from blueberries and traditional medicine offers unexplored potential for multi-target intervention.

To investigate Pte's effects on scopolamine-induced memory deficits and explore its mechanisms on the cholinergic regulation and NLRP3-mediated pyroptosis inhibition.

Cognitive impairment was induced by scopolamine (4 mg/kg, ip.) in mice. Behavioral tests, hippocampal analyses (acetylcholine levels, ChAT/AChE activities, neuroinflammation markers), network pharmacology (identifying NLRP3 as the pivotal hub), and molecular docking (validating Pte-NLRP3 binding) were combined with in vivo/in vitro NLRP3/Caspase-1/GSDMD pathway assays.

Pte dose-dependently ameliorated scopolamine-induced cognitive impairment, restored hippocampal acetylcholine levels and ChAT activity, while mitigating neuroinflammatory. Network pharmacology indentified 35 potential targets with NLRP3's active site. In vivo studies confirmed that Pte inhibited NLRP3 inflammasome activation. Notably, in vitro experiments revealed Pte functionally competes with MCC950, demonstrating NLRP3-dependent neuroprotection and specific attenuation of scopolamine-induced Caspase-1/GSDMD cleavage.

Our findings establish Pte as a novel dual-target therapeutic agent that simultaneously modulates cholinergic function and directly inhibits NLRP3-mediated pyroptosis. The MCC950 competition assay provides evidence of Pte's NLRP3-targeting specificity, offering a promising multi-target alternative to conventional single-pathway treatments for cognitive impairment.