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- W86501810 abstract "AIM:To investigate the killing effect of carcinoembryonic antigen (CEA) and tissue-specific cytosine deaminase (CD)/5fluorocytosine (5-FC) system on human colorectal carcinoma cell lines LoVo and SW480 in vitro. METHODS:Recombinant retroviral vector G1CEACDNa was constructed,in which the CD gene was controlled under the CEA promoter, and retroviral vector pCD2 were introduced through liposome technique respectively to the human colorectal carcinoma cell lines LoVo and SW480. Expression of CEA was high and low in both the cell lines respectively. The cells were selectively cultured in G418. The proliferative colonies were treated with 5-FC. RESULTS:After the transfection, LoVo-CEACD cells and LoVo-CD cells were more sensitive to 5-FC than their parental cells (P <0.01, t =5.688, n =9; P <0.01, t =3.136, n =9), and SW480-CEACD cells and SW480-CD cells were more sensitive than their parental cells as well (P <0.01,t =3.437,n =9;P <0.01, t =3.516, n =9). Furthermore, the LoVo-CEACD cells were more sensitive to 5-FC than the LoVo-CD cells (P <0.05, t =2.183,n =9) while the SW480-CEACD cells were less sensitive than SW480-CD cells.The LoVo-CEACD cells displayed a higher anti-tumor effect than SW480-CEACD cells in vitro. The bystander effect in all cells transfected with CD gene were observed in this study. CONCLUSION:The CEA tissue-specific CD/5-FC system displays an obvious targeting anti-tumor effect on human colorectal carcinoma cell lines LoVo and SW480, but the killing effect on the LoVo-CEACD cells is higher than that on the SW480-CEACD cells in vitro. Li CJ, Ma QJ, Lai DN, Lu JG, Wang XJ, Wang Q, Pan BR, Wu YZ, Li JM. Killing effect of CD/5-FC system on human colon cancer cell lines SW 480 and LoVo. Shijie Huaren Xiaohua Zazhi 2003;11(5):535-539" @default.
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- W86501810 date "2003-05-15" @default.
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- W86501810 title "Killing effect of CD/5-FC system on human colon cancer cell lines SW 480 and LoVo" @default.
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- W86501810 doi "https://doi.org/10.11569/wcjd.v11.i5.535" @default.
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