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http://dx.doi.org/10.6116/kjh.2015.30.1.77.

Effects of Kaempferol on Lippolysaccharide-induced Inflammation in Mouse Brain  

Lee, Hung-Gi (Department of Anatomy-Pointology, Gachon University)
Kim, Do-Hoon (Department of Oriental Medical Classics & History, Gachon University)
Kim, Youn-Sub (Department of Anatomy-Pointology, Gachon University)
Publication Information
The Korea Journal of Herbology / v.30, no.1, 2015 , pp. 77-84 More about this Journal
Abstract
Objectives : Brain inflammation early activates the microglia and activated microglia secrete a variety of pro-inflammatory cytokines. Kaempferol, which is a flavonoid in Cuscutae Semen, shows a wide range of physiological activities, including neurons protection and anti-inflammatory actions through inhibition of pro-inflammatory mediators. The present study examined the modulatory effect of kaempferol on cytokines [tumor necrosis factor- alpha ($TNF-{\alpha}$), interleukin-1beta ($IL-1{\beta}$) and interleukin-6 (IL-6)] and cyclooxygenase-2 (COX-2) mRNA expression and microglia activation in the brain tissue of the mouse. Methods : Kaempferol was administered orally three doses of 10, 20 and 30 mg/kg respectively, once 1 hour before the lippolysaccharide(LPS) (3 mg/kg, i.p.) injection. Brain tissue was removed at 4 hours after LPS injection. Cytokines and COX-2 mRNA expression in the brain tissue was measured by the quantitative real-time polymerase chain reaction (PCR) method. Iba1 expression was calculated by western blotting method. Microglia was observed with immunohistochemistry. Immunohistochemistry stained microglia was analyzed by using ImageJ software. Results : Kaempferol 20 and 30 mg/kg was significantly attenuated the expression of $TNF-{\alpha}$, $IL-1{\beta}$ and IL-6 mRNA. Kaempfrol 10, 20 and 30 mg/kg significantly attenuated COX-2 mRNA expression in the brain tissue. Kaempferol 30 mg/kg significantly suppressed the increase of Iba1 protein expression by LPS. Kaempferol 30 mg/kg significantly decreased the number of microglia in the cerebral cortex and the number and cell size of microglia in the hypothalamic region and the area percentage of ionized calcium binding adaptor molecule 1(Iba1)-expressed microglia in the hippocampus. Conclusions : This results indicate that kaempferol plays an anti-inflammatory role in the brain.
Keywords
Kaempferol; $TNF-{\alpha}$; $IL-1{\beta}$; IL-6; COX-2; Microglia;
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