Abstract
Experimental, clinical, and epidemiologic studies indicate that non-steroidal anti-inflammatory drugs (NSAIDs) are beneficial in Alzheimer's disease and other neuroinflammatory processes. One possible mechanism is an interaction with peroxisome proliferator-activated receptors (PPARs). We examined the effect of a specific PPARgamma agonist, rosiglitazone, on contextual fear conditioning in aged rats. Male rats (20-months-old) were administered rosiglitazone in the diet for 2 months prior to behavioral testing. Young control and aged rats fed rosiglitazone froze significantly more than did the aged control rats in a hippocampal-dependent fear conditioning task. Rosiglitazone had no effect hippocampal interleukin-1beta levels, markers of oxidative damage, and NMDA receptor expression. Therefore, activation of PPARgamma prevented age-related deficits in hippocampal function.
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