title: [To set up a mdrl multidrug resistant model of orthotopic transplantation of liver carcinoma in nude mice].
abstract: OBJECTIVE
  To set up a mdr1 multidrug resistant model of orthotopic transplantation of liver carcinoma in nude mice by intermittent abdominal chemotherapy.
  
  
  METHODS
  The hepatocellular carcinoma cell line HepG2 was first cultured, then subcutaneous carcinoma was produced to form the tumor donor mice. An orthotopic mdr1 hepatoma was produced by implanting the tumor fragment subserosally to the mice liver, and intermittent chemotherapy with Pharmorubicin given to induce drug resistance. Physical examination, ultrasonography, spiral CT and laparotomy were used to examine the growth of the tumor. RT-PCR and SP method by the monoclonal antibody JSB-1 were adoped to detect the expression of mdr1-mRNA and p-gp protein.
  
  
  RESULTS
  There was no mortality. The successful rate of tumor implantation is 88% (22/25), the successful rate of supplementary implantation was 100% (3/3), and the successful rate of induction of drug resistance was 80% (16/20). The expressions of mdr1-mRNA and p-gp in the Pharmorubicin group were 23 folds and 13 folds of the control group, respectively.
  
  
  CONCLUSIONS
  The nude mice mdr1 multidrug resistant model of orthotopic liver carcinoma were set up successfully, with its features similar to clinical cases. It would be helpful for the further study of the diagnosis and reversal strategy of the MDR phenomenon.
authors.affiliation: Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Han
authors.forename: Xiao-ping
authors.initials: XP
authors.lastname: Chen
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000032:analysis; D000818:Animals; D045744:Cell Line, Tumor; D018432:Drug Resistance, Multiple; D019008:Drug Resistance, Neoplasm; D019450:Genes, MDR; D006801:Humans; D008114:Liver Neoplasms, Experimental / Q000188:drug therapy* / Q000235:genetics / Q000473:pathology; D051379:Mice; D008819:Mice, Nude; D009368:Neoplasm Transplantation; D012333:RNA, Messenger / Q000032:analysis; D014183:Transplantation, Heterologous
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D012333:RNA, Messenger