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Isoliquiritigenin (isoLQ), a chalcone found in licorice, has shown a variety of biological activity including anti-inflammatory and antioxidative effects, and the distribution of isoLQ in gastrointestinal tract was higher than any other tissues. Thus, we evaluated whether or not isoLQ attenuated the dextran sulfate sodium (DSS)-induced colitis by observing the physiological changes (body weight loss, diarrhea, bleeding stool, overall disease activity index (DAI) scores, colon length), histopathological analysis and myeloperoxidase (MPO) activities of esophagus and colon. Also, the MAPK pathways including phosphorylation of ERK1/2, p38, and AKT, and the activation of NK-κB were evaluated in colon tissue. Interestingly, the reduction of body weight and colon length, increase of diarrhea, bloody stool, DAI scores and MPO activity, and histologic disturbances in DSS-induced colitis were recovered by isoLQ treatment. Also …