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STAT3 and NF-?B are common targets for kaempferol-mediated attenuation of COX-2 expression in IL-6-induced macrophages and carrageenan-induced mouse paw edema #MMPMID28955792
Basu A; Das AS; Sharma M; Pathak MP; Chattopadhyay P; Biswas K; Mukhopadhyay R
Biochem Biophys Rep 2017[Dec]; 12 (ä): 54-61 PMID28955792show ga
Cycloxygenase-2 (COX-2) is the inducible isoform of cycloxygenase enzyme family that catalyzes synthesis of inflammatory mediators, prostanoids and prostaglandins, and therefore, can be targeted by anti-inflammatory drugs. Here, we showed a plant polyphenol, kaempferol, attenuated IL-6-induced COX-2 expression in human monocytic THP-1 cells suggesting its beneficial role in chronic inflammation. Kaempferol deactivated and prevented nuclear localization of two major transcription factors STAT3 and NF-?B, mutually responsible for COX-2 induction in response to IL-6. Moreover, STAT3 and NF-?B were simultaneously deactivated by kaempferol in acute inflammation, as shown by carrageenan-induced mouse paw edema model. The concomitant reduction in COX-2 expression in paw tissues suggested kaempferol?s role in mitigation of inflammation by targeting STAT3 and NF-?B.