title: Peroxisome proliferator-activated receptors in regulation of cytochromes P450: new way to overcome multidrug resistance?
abstract: Embryonic and tumour cells are able to protect themselves against various harmful compounds. In human pathology, this phenomenon exists in the form of multidrug resistance (MDR) that significantly deteriorates success of anticancer treatment. Cytochromes P450 (CYPs) play one of the key roles in the xenobiotic metabolism. CYP expression could contribute to resistance of cancer cells to chemotherapy. CYP epoxygenases (CYP2C and CYP2J) metabolize about 20% of clinically important drugs. Besides of drug metabolism, CYP epoxygenases and their metabolites play important role in embryos, normal body function, and tumors. They participate in angiogenesis, mitogenesis, and cell signaling. It was found that CYP epoxygenases are affected by peroxisome proliferator-activated receptor α (PPARα). Based on the results of current studies, we assume that PPARs ligands may regulate CYP2C and CYP2J and in some extent they may contribute to overcoming of MDR in patients with different types of tumours.
authors.affiliation: Department of Histology and Embryology, Faculty of Medicine and Dentistry, Palacky University, Hnevotinska 3, 775 15 Olomouc, Czech Republic. keri@email.cz
authors.forename: Katerina
authors.initials: K
authors.lastname: Cizkova
authors.forename: Anna
authors.initials: A
authors.lastname: Konieczna
authors.forename: Bela
authors.initials: B
authors.lastname: Erdosova
authors.forename: Radka
authors.initials: R
authors.lastname: Lichnovska
authors.forename: Jiri
authors.initials: J
authors.lastname: Ehrmann
mesh_terms: D000818:Animals; D003577:Cytochrome P-450 Enzyme System / Q000378:metabolism*; D018432:Drug Resistance, Multiple; D019008:Drug Resistance, Neoplasm; D006801:Humans; D008954:Models, Biological; D047492:Peroxisome Proliferator-Activated Receptors / Q000378:metabolism*
chemical_list: D047492:Peroxisome Proliferator-Activated Receptors; D003577:Cytochrome P-450 Enzyme System