Previous studies suggested that p38 MAP kinase inhibition can suppress the glial cell activation. This study demonstrated that NADPH oxidase activity is essential for inflammogen-mediated induction of reactive oxygen species (ROS) and iNOS expression in murine N9 microglial cells. The NADPH oxidase inhibitor, diphenyleneiodonium chloride, blocked lipopolysaccharide (LPS)-induced nitric oxide (NO) production in parallel with inhibition of NADPH oxidase activity. Of interest, p38 MAP kinase inhibition suppressed both NO production and NADPH oxidase activity which were induced by LPS. In addition, this study revealed that quercetin, a bioactive phenolic compound known to inhibit oxidative stress and inflammation in macrophage, significantly attenuates microglial production of NO and ROS, a product of NADPH oxidase in response to LPS treatment. Furthermore, quercetin inhibited p38 MAP kinase activation induced by LPS in microglia. These results suggest that quercetin may inhibit LPS-induced microglia activation through inhibition of p38 MAP kinase.
키워드
P38 MAP kinaseMicrogliaQuercetin
저자
Hong Sung CHUN [ Dept. of Biotechnology, Chosun University, Gwangju 501-759, Korea. ]
한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
설립연도
1984
분야
공학>생물공학
소개
이 법인은 생물 공학의 발전과 보급에 이바지하고, 회원 상호 간의 연구 협력과 친목을 도모함을 목적으로 한다
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