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Objective: To study changes of NF-KB activity in colon carcinoma cell lines treated with different crude extracts of abrotani herba obtained through solvent extraction methods.Methods: Crude extracts of abrotani herba were extracted with ligarine, chloroform, acetoacetate and n-butanol in separating funnel.Exposure concentration of crude extracts were obtained through detecting viability of HT-29 cells by MTT.Then HT-29 cells and Lovo cells were treated with different crude extracts respectively.Changes of NF-KB activity in HT-29 cells and Lovo cells using different crude extracts were observed by EMSA.Results: Successfully extracted different crude extracts of abrotani herba and called them ligarine extract, chloroform extract,acetoacetate extract, n-butanol extract and remaining extract for short.NF-KB activity was significantly inhibited in HT-29 cells treated with chloroform extract, there were no significant differences in other groups compared with the control.The same change of NF-KB activity was observed in Lovo calls using different crude extracts of abrotani herba.Conclusion: NF-KB activity can be inhibited in colon carcinoma HT-29 calls and Lovo cells treated with chloroform extract obtained from abrotani herba through the method of solvent extraction.