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Histologic analysis of colon tissues. TNBS-induced colitis mouse model was established and then treated with 0.1 g/kg/d of andrographolide (AG) or 0.5 g/kg/d of Mesalazine for 7 d. At 24 h after the last delivery, the mice were killed and colon tissues were subjected to hematoxylin and eosin staining. Magnification: × 100.
