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Curcumin attenuates the release of pro-inflammatory cytokines in lipopolysaccharide-stimulated BV2 microglia

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Abstract

Aim: Pro-inflammatory mediators, such as prostaglandin E2 (PGE2) and nitric oxide (NO), and pro-inflammatory cytokines such as interleukin (IL)-1, IL-6, and TNF-α, play pivotal roles in brain injuries. The anti-inflammatory properties are known to be associated with significant reductions in pro-inflammatory mediators in brain injuries. In the present study we investigate whether the effects of curcumin on the production of pro-inflammatory mediators in lipopolysaccharide (LPS)-stimulated BV2 microglia. Methods: Curcumin were administered and their effects on LPS-induced pro-inflammatory mediators were monitored by Western blotting and RT-PCR. Result: Curcumin significantly inhibited the release of NO, PGE2, and pro-inflammatory cytokines in a dose-dependent manner. Curcumin also attenuated the expressions of inducible NO synthase and cyclooxygenase-2 mRNA and protein levels. Moreover, curcumin suppressed NF-B activation via the translocation of p65 into the nucleus. Our data also indicate that curcumin exerts anti-inflammatory properties by suppressing the transcription of proinflammatory cytokine genes through the NF-B signaling pathway. Conclusion: Anti-inflammatory properties of curcumin may be useful for treating the inflammatory and deleterious effects of microglial activation in response to LPS stimulation.
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Keywords: NF-B; curcumin; cyclooxygenase-2; inducible nitric oxide synthase; pro-inflammatory cytokines

Document Type: Research Article

Affiliations: 1: Department of Microbiology, College of Natural Sciences, Pusan National University, Busan 609-735, Korea 2: Department of Biochemistry, Dongeui University College of Oriental Medicine, Busan 614-054, Korea

Publication date: 2007-10-01

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