• Department of General Surgery, First Affiliated Hospital, West China University of Medical Sciences, Chengdu 610041;
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Objective  To investigate the effect of phosphorothioate antisense oligonucleotides(AS-ODN) on suppressing multidrug resistance-associated protein gene(MRP) in human drug-resistant hepatocellular carcinoma cell line (SMMC-7721/ADM).
Methods  Cell line was transfected with a synthetic S-ODN complementary to the coding region of MRP mRNA, Lipofectamine acting as carrier. The drug sensitivity was measured by MTT assay. The expression of MRP mRNA was detected by RT-PCR and the expression of P190 was detected by flow cytometry.
Results  AS-ODN inhibited expression of MRP mRNA and P190 and promoted sensitivity to daunorubicinum and adriamycinum.
Conclusion  AS-ODN can reduce the expression of MRP gene. MDR caused by MRP is an important cause of multidrug resistance of SMMC-7721/ADM.

Citation: YANG Jiayin,LUO Huayou,LIN Qiyuan,et al.. EFFECTS OF PHOSPHOROTHIOATE ANTISENSE OLIGONUCLEOTIDES TARGETING MRP mRNA ON DRUGRESISTANT CELL LINE SMMC-7721/ADM. CHINESE JOURNAL OF BASES AND CLINICS IN GENERAL SURGERY, 2001, 8(3): 141-144. doi: Copy