title: Reversal of HCC drug resistance by using hammerhead ribozymes against multidrug resistance 1 gene.
abstract: To reverse multidrug resistance(MDR) of HepG2 by anti-MDR1 hammerhead ribozyme, an anti-MDR1 hammerhead ribozyme was developed and delivered to P-gp-overproducing human hepatocarcinoma cell line HepG2 by a retroviral vector containing RNA polymerase III promoter. The expression of mdr1/Pgp and Rz was detected in HepG2, HepG2 multidrug-resistant cell line and HepG2 Rz-transfected cells by semi-quantitative RT-PCR and Western blot methods. Moreover, MTT assay was employed to detect the sensitivity of these ribozyme-transfected cells, and Rhodamine123 (Rh123) was used to test the function of Pgp. The Rz- transfected HepG2 cells became doxorubicin-sensitive, which was concomitant with the decreased MDR1 expression. The study showed that the retrovirus vector encoding the anti-MDR1 ribozyme may be applicable to the treatment of MDR cells.
authors.affiliation: The Hepatic Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
authors.forename: Sen
authors.initials: S
authors.lastname: Qia
authors.forename: Hai
authors.initials: H
authors.lastname: Wang
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Chen
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000096:biosynthesis* / Q000235:genetics; D006528:Carcinoma, Hepatocellular / Q000188:drug therapy / Q000235:genetics*; D045744:Cell Line, Tumor; D018432:Drug Resistance, Multiple; D019008:Drug Resistance, Neoplasm / Q000235:genetics*; D006801:Humans; D008113:Liver Neoplasms / Q000188:drug therapy / Q000235:genetics*; D016337:RNA, Catalytic / Q000235:genetics*
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D016337:RNA, Catalytic; C427204:hammerhead ribozyme