Martin Krkoška1,2, Jana Nekvindová3, Kateřina Nevědělová1,2, Veronika Zubáňová3, Lenka Radová4, Jan Vondráček1, Jarmila Herůdková1, Ondřej Slabý4,5, Igor Kiss6, Lucia Bohovicová6, Pavel Fabian7, Zuzana Tylichová1, Zdeněk Kala8, Petr Kysela8, Lenka Ostřížková9, Vladimír Palička3, Alena Hyršlová Vaculová10. 1. Department of Cytokinetics, Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65, Brno, Czech Republic. 2. Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic. 3. Institute of Clinical Biochemistry and Diagnostics, University Hospital Hradec Králové, Hradec Králové, Czech Republic. 4. Central European Institute of Technology, Masaryk University, Brno, Czech Republic. 5. Department of Biology, Faculty of Medicine, Masaryk University, Brno, Czech Republic. 6. Department of Comprehensive Cancer Care, Masaryk Memorial Cancer Institute, Faculty of Medicine, Masaryk University, Brno, Czech Republic. 7. Department of Oncological and Experimental Pathology, Masaryk Memorial Cancer Institute, Faculty of Medicine, Masaryk University, Brno, Czech Republic. 8. Department of Surgery, University Hospital Brno, Faculty of Medicine, Masaryk University, Brno, Czech Republic. 9. Department of Hematology, Oncology and Internal Medicine, University Hospital Brno, Faculty of Medicine, Masaryk University, Brno, Czech Republic. 10. Department of Cytokinetics, Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65, Brno, Czech Republic. vaculova@ibp.cz.
Abstract
BACKGROUND: Hepatocellular carcinoma (HCC) is a major contributor to the worldwide cancer burden. Recent studies on HCC have demonstrated dramatic alterations in expression of several cytochrome P450 (CYP) family members that play a crucial role in biotransformation of many drugs and other xenobiotics; however, the mechanisms responsible for their deregulation remain unclear. METHODS: We investigated a potential involvement of miRNAs in downregulation of expression of CYPs observed in HCC tumors. We compared miRNA expression profiles (TaqMan Array Human MicroRNA v3.0 TLDA qPCR) between HCC human patient tumors with strong (CYP-) and weak/no (CYP+) downregulation of drug-metabolizing CYPs. The role of significantly deregulated miRNAs in modulation of expression of the CYPs and associated xenobiotic receptors was then investigated in human liver HepaRG cells transfected with relevant miRNA mimics or inhibitors. RESULTS: We identified five differentially expressed miRNAs in CYP- versus CYP+ tumors, namely miR-29c, miR-125b1, miR-505, miR-653 and miR-675. The two most-upregulated miRNAs found in CYP- tumor samples, miR-29c and miR-653, were found to act as efficient suppressors of CYP1A2 or AHR expression. CONCLUSIONS: Our results revealed a novel role of miR-653 and miR-29c in regulation of expresion of CYPs involved in crucial biotransformation processes in liver, which are often deregulated during liver cancer progression.
BACKGROUND: Hepatocellular carcinoma (HCC) is a major contributor to the worldwide cancer burden. Recent studies on HCC have demonstrated dramatic alterations in expression of several cytochrome P450 (CYP) family members that play a crucial role in biotransformation of many drugs and other xenobiotics; however, the mechanisms responsible for their deregulation remain unclear. METHODS: We investigated a potential involvement of miRNAs in downregulation of expression of CYPs observed in HCC tumors. We compared miRNA expression profiles (TaqMan Array Human MicroRNA v3.0 TLDA qPCR) between HCC human patient tumors with strong (CYP-) and weak/no (CYP+) downregulation of drug-metabolizing CYPs. The role of significantly deregulated miRNAs in modulation of expression of the CYPs and associated xenobiotic receptors was then investigated in human liver HepaRG cells transfected with relevant miRNA mimics or inhibitors. RESULTS: We identified five differentially expressed miRNAs in CYP- versus CYP+ tumors, namely miR-29c, miR-125b1, miR-505, miR-653 and miR-675. The two most-upregulated miRNAs found in CYP- tumor samples, miR-29c and miR-653, were found to act as efficient suppressors of CYP1A2 or AHR expression. CONCLUSIONS: Our results revealed a novel role of miR-653 and miR-29c in regulation of expresion of CYPs involved in crucial biotransformation processes in liver, which are often deregulated during liver cancer progression.
Authors: Hong Chen; Zhong-Yang Shen; Wang Xu; Tie-Yan Fan; Jun Li; Yuan-Fu Lu; Ming-Liang Cheng; Jie Liu Journal: World J Gastroenterol Date: 2014-07-14 Impact factor: 5.742
Authors: Dongying Li; William H Tolleson; Dianke Yu; Si Chen; Lei Guo; Wenming Xiao; Weida Tong; Baitang Ning Journal: J Environ Sci Health C Environ Carcinog Ecotoxicol Rev Date: 2019-07-15 Impact factor: 3.781
Authors: Jana Nekvindova; Alena Mrkvicova; Veronika Zubanova; Alena Hyrslova Vaculova; Pavel Anzenbacher; Pavel Soucek; Lenka Radova; Ondrej Slaby; Igor Kiss; Jan Vondracek; Alena Spicakova; Lucia Bohovicova; Pavel Fabian; Zdenek Kala; Vladimir Palicka Journal: Biochem Pharmacol Date: 2020-03-13 Impact factor: 5.858