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Inflammatory bowel diseases (IBDs) are chronic inflammatory gastrointestinal disorders caused by a dysregulated mucosal immune response and epithelial barrier disruption. Conventional treatment of IBD is currently limited to overcoming patient symptoms and is often associated with severe adverse effects from the drugs used. Modified Pulsatilla decoction has been used previously to treat ulcerative colitis (UC) in clinical practice in China, however, the underlying mechanism in the treatment of UC remains to be elucidated. In the present study, the efficiency and mechanisms of modified Pulsatilla decoction in the treatment of oxazolone‑induced colitis were investigated. Assessment of clinical colitis and histological examination found that the administration of modified Pulsatilla decoction attenuated the severity of oxazolone‑induced colitis in mice. Measurement of cytokine concentration, western blotting and reverse transcription‑quantitative polymerase chain reaction demonstrated modified Pulsatilla decoction treatment significantly reduced the secretion of pro‑inflammatory cytokines and restored alterations in tight junction proteins in the colon tissues. In addition, modified Pulsatilla decoction suppressed the activation of the nuclear factor‑κB signaling pathway. Thus, the findings of the present study demonstrated that modified Pulsatilla decoction offers an effective therapeutic approach for the treatment of IBD and revealed the underlying mechanisms of action offered by modified Pulsatilla decoction.

Modified Pulsatilla decoction attenuates oxazolone-induced colitis in mice through suppression of inflammation and epithelial barrier disruption