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- W2106122924 abstract "The pathological hallmark of Alzheimer disease is deposition of amyloid-beta protein (Abeta) in the brain. Telmisartan is a unique angiotensin II receptor blocker with peroxisome proliferator-activated receptor-gamma (PPAR-gamma)-stimulating activity. Activation of PPAR-gamma is expected to prevent inflammation and Abeta accumulation in the brain. We investigated the possible preventive effect of telmisartan on cognitive decline in an Alzheimer disease mouse model via PPAR-gamma activation. Here, male ddY mice underwent ICV injection of Abeta 1-40. Cognitive function was evaluated by the Morris water maze test. A low dose of telmisartan (0.35 mg/kg per day) was administered in drinking water with or without GW9662, a PPAR-gamma antagonist. Cerebral blood flow was evaluated by laser speckle flowmetry. Inflammatory cytokine levels were measured by quantitative RT-PCR. Abeta 1-40 ICV injection significantly impaired cognitive function. Pretreatment with telmisartan improved this cognitive decline to a similar level to that in control mice. Cotreatment with GW9662, a PPAR-gamma antagonist, attenuated this telmisartan-mediated improvement of cognition. Treatment with telmisartan enhanced cerebral blood flow and attenuated the Abeta-induced increase in expression of cytokines, such as tumor necrosis factor-alpha and inducible NO synthase in the brain. Interestingly, coadministration of GW9662 cancelled these beneficial effects of telmisartan. Abeta 1-40 concentration in the brain was significantly decreased by treatment with telmisartan, whereas administration of GW9662 attenuated the decrease in telmisartan-mediated Abeta 1-40 concentration. Taken together, our findings suggest that even a low dose of telmisartan had a preventive effect on cognitive decline in an Alzheimer disease mouse model, partly because of PPAR-gamma activation." @default.
- W2106122924 created "2016-06-24" @default.
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- W2106122924 date "2009-10-01" @default.
- W2106122924 modified "2023-10-04" @default.
- W2106122924 title "Cognitive Deficit in Amyloid-β–Injected Mice Was Improved by Pretreatment With a Low Dose of Telmisartan Partly Because of Peroxisome Proliferator-Activated Receptor-γ Activation" @default.
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- W2106122924 doi "https://doi.org/10.1161/hypertensionaha.109.136879" @default.
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