title: Evaluation of the reversal of multidrug resistance by MDR1 ribonucleic acid interference in a human colon cancer model using a Renilla luciferase reporter gene and coelenterazine.
abstract: The reversal effect of multidrug resistance (MDR1) gene expression by adenoviral vector-mediated MDR1 ribonucleic acid interference was assessed in a human colon cancer animal model using bioluminescent imaging with Renilla luciferase (Rluc) gene and coelenterazine, a substrate for Rluc or MDR1 gene expression. A fluorescent microscopic examination demonstrated an increased green fluorescent protein signal in Ad-shMDR1- (recombinant adenovirus that coexpressed MDR1 small hairpin ribonucleic acid [shRNA] and green fluorescent protein) infected HCT-15/Rluc cells in a virus dose-dependent manner. Concurrently, with an increasing administered virus dose (0, 15, 30, 60, and 120 multiplicity of infection), Rluc activity was significantly increased in Ad-shMDR1-infected HCT-15/Rluc cells in a virus dose-dependent manner. In vivo bioluminescent imaging showed about 7.5-fold higher signal intensity in Ad-shMDR1-infected tumors than in control tumors (p < .05). Immunohistologic analysis demonstrated marked reduction of P-glycoprotein expression in infected tumor but not in control tumor. In conclusion, the reversal of MDR1 gene expression by MDR1 shRNA was successfully evaluated by bioluminescence imaging with Rluc activity using an in vivo animal model with a multidrug resistance cancer xenograft.
authors.affiliation: Department of Nuclear Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.
authors.forename: Yong Hyun
authors.initials: YH
authors.lastname: Jeon
authors.forename: Seon-ae
authors.initials: SA
authors.lastname: Bae
authors.forename: Yong Jin
authors.initials: YJ
authors.lastname: Lee
authors.forename: You La
authors.initials: YL
authors.lastname: Lee
authors.forename: Sang-Woo
authors.initials: SW
authors.lastname: Lee
authors.forename: Ghil-Suk
authors.initials: GS
authors.lastname: Yoon
authors.forename: Byeong-Cheol
authors.initials: BC
authors.lastname: Ahn
authors.forename: Jeoung-Hee
authors.initials: JH
authors.lastname: Ha
authors.forename: Jaetae
authors.initials: J
authors.lastname: Lee
mesh_terms: D018435:ATP Binding Cassette Transporter, Subfamily B; D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000096:biosynthesis / Q000172:deficiency / Q000235:genetics*; D000256:Adenoviridae / Q000235:genetics; D000818:Animals; D045744:Cell Line, Tumor; D003110:Colonic Neoplasms / Q000188:drug therapy* / Q000235:genetics* / Q000821:virology; D016572:Cyclosporine / Q000494:pharmacology; D018432:Drug Resistance, Multiple / Q000235:genetics; D019008:Drug Resistance, Neoplasm / Q000235:genetics; D017930:Genes, Reporter; D006801:Humans; D007093:Imidazoles / Q000494:pharmacology*; D007150:Immunohistochemistry; D049410:Luciferases, Renilla / Q000235:genetics* / Q000378:metabolism; D008163:Luminescent Measurements; D051379:Mice; D008954:Models, Biological; D011719:Pyrazines / Q000494:pharmacology*; D034622:RNA Interference; D034741:RNA, Small Interfering / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: C513055:ABCB1 protein, human; D018435:ATP Binding Cassette Transporter, Subfamily B; D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D007093:Imidazoles; D011719:Pyrazines; D034741:RNA, Small Interfering; C017144:coelenterazine; D016572:Cyclosporine; D049410:Luciferases, Renilla