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Kim KH, Park JW, Yang YM, Song KD, Cho BW. Effect of methylsulfonylmethane on oxidative stress and CYP3A93 expression in fetal horse liver cells. Anim Biosci 2020; 34:312-319. [PMID: 32898949 PMCID: PMC7876717 DOI: 10.5713/ajas.20.0061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 07/28/2020] [Indexed: 12/13/2022] Open
Abstract
Objective Stress-induced cytotoxicity caused by xenobiotics and endogenous metabolites induces the production of reactive oxygen species and often results in damage to cellular components such as DNA, proteins, and lipids. The cytochrome P450 (CYP) family of enzymes are most abundant in hepatocytes, where they play key roles in regulating cellular stress responses. We aimed to determine the effects of the antioxidant compound, methylsulfonylmethane (MSM), on oxidative stress response, and study the cytochrome P450 family 3 subfamily A (CYP3A) gene expression in fetal horse hepatocytes. Methods The expression of hepatocyte markers and CYP3A family genes (CYP3A89, CYP3A93, CYP3A94, CYP3A95, CYP3A96, and CYP3A97) were assessed in different organ tissues of the horse and fetal horse liver-derived cells (FHLCs) using quantitative reverse transcription polymerase chain reaction. To elucidate the antioxidant effects of MSM on FHLCs, cell viability, levels of oxidative markers, and gene expression of CYP3A were investigated in H2O2-induced oxidative stress in the presence and absence of MSM. Results FHLCs exhibited features of liver cells and simultaneously maintained the typical genetic characteristics of normal liver tissue; however, the expression profiles of some liver markers and CYP3A genes, except that of CYP3A93, were different. The expression of CYP3A93 specifically increased after the addition of H2O2 to the culture medium. MSM treatment reduced oxidative stress as well as the expression of CYP3A93 and heme oxygenase 1, an oxidative marker in FHLCs. Conclusion MSM could reduce oxidative stress and hepatotoxicity in FHLCs by altering CYP3A93 expression and related signaling pathways.
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Affiliation(s)
- Kyoung Hwan Kim
- Department of Animal Science, College of Natural Resources and Life Sciences, Pusan National University, Miryang 50463, Korea.,Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Korea
| | - Jeong-Woong Park
- Department of Animal Science, College of Natural Resources and Life Sciences, Pusan National University, Miryang 50463, Korea
| | - Young Mok Yang
- Department of Pathology, School of Medicine, Institute of Biomedical Science and Technology, Konkuk University, Chungju 27478, Korea
| | - Ki-Duk Song
- Department of Agriculture Convergence Technology, Jeonbuk National University, Jeonju 54896, Korea
| | - Byung-Wook Cho
- Department of Animal Science, College of Natural Resources and Life Sciences, Pusan National University, Miryang 50463, Korea.,Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Korea
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2
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Functional impact of cytochrome P450 3A (CYP3A) missense variants in cattle. Sci Rep 2019; 9:19672. [PMID: 31873175 PMCID: PMC6927969 DOI: 10.1038/s41598-019-56271-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 12/09/2019] [Indexed: 12/26/2022] Open
Abstract
Cytochrome P450 3A is the most important CYP subfamily in humans, and CYP3A4/CYP3A5 genetic variants contribute to inter-individual variability in drug metabolism. However, no information is available for bovine CYP3A (bCYP3A). Here we described bCYP3A missense single nucleotide variants (SNVs) and evaluated their functional effects. CYP3A28, CYP3A38 and CYP3A48 missense SNVs were identified in 300 bulls of Piedmontese breed through targeted sequencing. Wild-type and mutant bCYP3A cDNAs were cloned and expressed in V79 cells. CYP3A-dependent oxidative metabolism of testosterone (TST) and nifedipine (NIF) was assessed by LC-MS/MS. Finally, SNVs functional impact on TST hydroxylation was measured ex vivo in liver microsomes from individually genotyped animals. Thirteen missense SNVs were identified and validated. Five variants showed differences in CYP3A catalytic activity: three CYP3A28 SNVs reduced TST 6β-hydroxylation; one CYP3A38 variant increased TST 16β-hydroxylation, while a CYP3A48 SNV showed enhanced NIF oxidation. Individuals homozygous for rs384467435 SNV showed a reduced TST 6β-hydroxylation. Molecular modelling showed that most of SNVs were distal to CYP3A active site, suggesting indirect effects on the catalytic activity. Collectively, these findings demonstrate the importance of pharmacogenetics studies in veterinary species and suggest bCYP3A genotype variation might affect the fate of xenobiotics in food-producing species such as cattle.
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Rudolph W, Remane D, Wissenbach DK, Peters FT. Comparative study on the metabolism of the ergot alkaloids ergocristine, ergocryptine, ergotamine, and ergovaline in equine and human S9 fractions and equine liver preparations. Xenobiotica 2019; 49:1149-1157. [PMID: 30623698 DOI: 10.1080/00498254.2018.1542187] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
1. Ergopeptine alkaloids like ergovaline and ergotamine are suspected to be associated with fescue toxicosis and ergotism in horses. Information on the metabolism of ergot alkaloids is scarce, especially in horses, but needed for toxicological analysis of these drugs in urine/feces of affected horses. The aim of this study was to investigate the metabolism of ergovaline, ergotamine, ergocristine, and ergocryptine in horses and comparison to humans. 2. Supernatants of alkaloid incubations with equine and human liver S9 fractions were analyzed by reversed-phase liquid-chromatography coupled to high-resolution tandem mass spectrometry with full scan and MS2 acquisition. Metabolite structures were postulated based on their MS2 spectra in comparison to those of the parent alkaloids. All compounds were extensively metabolized yielding nor-, N-oxide, hydroxy and dihydro-diole metabolites with largely overlapping patterns in equine and human liver S9 fractions. However, some metabolic steps e.g. the formation of 8'-hydroxy metabolites were unique for human metabolism, while formation of the 13/14-hydroxy and 13,14-dihydro-diol metabolites were unique for equine metabolism. Incubations with equine whole liver preparations yielded less metabolites than the S9 fractions. 3. The acquired data can be used to develop metabolite-based screenings for these alkaloids, which will likely extend their detection windows in urine/feces from affected horses.
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Affiliation(s)
- Wiebke Rudolph
- a Institute of Forensic Medicine , Jena University Hospital , Jena , Germany
| | - Daniela Remane
- a Institute of Forensic Medicine , Jena University Hospital , Jena , Germany
| | - Dirk K Wissenbach
- a Institute of Forensic Medicine , Jena University Hospital , Jena , Germany
| | - Frank T Peters
- a Institute of Forensic Medicine , Jena University Hospital , Jena , Germany
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Sandbaumhüter FA, Vimercati S, Thormann W, Mevissen M. Role of the equine CYP3A94, CYP3A95 and CYP3A97 in ketamine metabolism in presence of medetomidine, diazepam and methadone studied by enantioselective capillary electrophoresis. Toxicol In Vitro 2018; 50:242-248. [PMID: 29614330 DOI: 10.1016/j.tiv.2018.03.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 01/18/2018] [Accepted: 03/30/2018] [Indexed: 12/11/2022]
Abstract
The anesthetic ketamine is often combined with analgesics and benzodiazepines in equine medicine. Therefore, drug-drug interactions are possible. Enzyme kinetics for ketamine N-demethylation were determined using equine CYP3A94, CYP3A95 and CYP3A97, and the effect of medetomidine, diazepam and methadone on the ketamine metabolism was studied in vitro. Ketamine was incubated with the CYPs or equine liver microsomes (ELM) alone or in presence of medetomidine, diazepam and/or methadone for different times. Norketamine levels were determined using enantioselective capillary electrophoresis (CE) with highly sulfated γ-cyclodextrin as chiral selector. The three equine CYPs were demonstrated to be involved in ketamine N-demethylation and the kinetics can be described with the Michaelis-Menten model. Vmax values calculated for CYP3A94 and CYP3A97 were higher than for CYP3A95. The lowest Km value was found for CYP3A94. In contrast to diazepam and methadone, the α2-recepor agonist medetomidine diminished the norketamine formation significantly in CYP3A94 and CYP3A97. In ELM, increasing concentrations of diazepam inhibited the norketamine formation. Despite the differences in ketamine N-demethylation in combination with diazepam and methadone, the effect is unlikely to be of clinical relevance because ketamine and the other drugs do not have a small therapeutic margin.
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Affiliation(s)
- Friederike A Sandbaumhüter
- Clinical Pharmacology Laboratory, Institute for Infectious Diseases, University of Bern, Murtenstrasse 35, Bern 3008, Switzerland
| | - Sara Vimercati
- Veterinary Pharmacology and Toxicology, Department of Clinical research and Veterinary Public Health, Vetsuisse Faculty, University of Bern, Länggassstrasse 124, Bern 3012, Switzerland
| | - Wolfgang Thormann
- Clinical Pharmacology Laboratory, Institute for Infectious Diseases, University of Bern, Murtenstrasse 35, Bern 3008, Switzerland
| | - Meike Mevissen
- Veterinary Pharmacology and Toxicology, Department of Clinical research and Veterinary Public Health, Vetsuisse Faculty, University of Bern, Länggassstrasse 124, Bern 3012, Switzerland.
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Vimercati S, Büchi M, Zielinski J, Peduto N, Mevissen M. Testosterone metabolism of equine single CYPs of the 3A subfamily compared to the human CYP3A4. Toxicol In Vitro 2017; 41:83-91. [DOI: 10.1016/j.tiv.2017.02.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 02/06/2017] [Accepted: 02/20/2017] [Indexed: 01/02/2023]
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Pennington MR, Curtis TM, Divers TJ, Wagner B, Ness SL, Tennant BC, Van de Walle GR. Equine Mesenchymal Stromal Cells from Different Sources Efficiently Differentiate into Hepatocyte-Like Cells. Tissue Eng Part C Methods 2016; 22:596-607. [PMID: 27113698 DOI: 10.1089/ten.tec.2015.0403] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Adult equine hepatocytes have proven challenging to culture long term in vitro as they rapidly lose their morphology and functionality, thus limiting studies on liver function and response to disease. In this study, we describe for the first time the differentiation of equine mesenchymal stromal cells (MSC) from a variety of sources into functional hepatocyte-like cells (HLC). First, we differentiated equine umbilical cord blood (UCB)-derived MSC into HLC and found that these cells exhibited a distinct polygonal morphology, stored glycogen as visualized by periodic acid Schiff's reagent staining, and were positive for albumin and other hepatocyte-specific genes. Second, we demonstrated that UCB-HLC could be revived following cryopreservation and retained their phenotype for at least 10 days. Third, we differentiated three sets of MSC from bone marrow (BM), adipose tissue (AT), and peripheral blood (PB), matched within the same horse. We achieved a 100% differentiation success rate with BM, 0% with AT, and 66% with PB. An additional set of nine PB-MSC samples resulted in an overall success rate of 42% (n = 12), and age or gender did not seem to have an effect on the success of hepatic differentiation from that source. In a final set of experiments, we evaluated the use of these HLC as tools in different fields of biomedical research like virology, to study viral growth, and toxicology, to study chemicals with hepatic toxicity. Equine HLC were found susceptible for infection with the equine herpesviruses type 1 (EHV-1), -2, and -5, and exhibited a more sensitive dose-dependent response to arsenic toxicity than the commonly used human hepatocellular cell line HepG2. Taken together, these data indicate that equine MSC can be efficiently differentiated into HLC and these equine HLC could be a useful tool for in vitro studies.
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Affiliation(s)
- Matthew R Pennington
- 1 Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University , Ithaca, New York
| | - Theresa M Curtis
- 1 Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University , Ithaca, New York.,2 Department of Biological Sciences, State University of New York at Cortland , Cortland, New York
| | - Thomas J Divers
- 3 Department of Clinical Sciences, College of Veterinary Medicine, Cornell University , Ithaca, New York
| | - Bettina Wagner
- 4 Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University , Ithaca, New York
| | - SallyAnne L Ness
- 1 Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University , Ithaca, New York.,3 Department of Clinical Sciences, College of Veterinary Medicine, Cornell University , Ithaca, New York
| | - Bud C Tennant
- 3 Department of Clinical Sciences, College of Veterinary Medicine, Cornell University , Ithaca, New York
| | - Gerlinde R Van de Walle
- 1 Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University , Ithaca, New York
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Nakayama SMM, Ikenaka Y, Hayami A, Mizukawa H, Darwish WS, Watanabe KP, Kawai YK, Ishizuka M. Characterization of equine cytochrome P450: role of CYP3A in the metabolism of diazepam. J Vet Pharmacol Ther 2016; 39:478-87. [DOI: 10.1111/jvp.12303] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Accepted: 01/29/2016] [Indexed: 11/29/2022]
Affiliation(s)
- S. M. M. Nakayama
- Laboratory of Toxicology; Department of Environmental Veterinary Sciences; Graduate School of Veterinary Medicine; Hokkaido University; Kita-ku Sapporo Japan
| | - Y. Ikenaka
- Laboratory of Toxicology; Department of Environmental Veterinary Sciences; Graduate School of Veterinary Medicine; Hokkaido University; Kita-ku Sapporo Japan
- Water Research Group; Unit for Environmental Sciences and Management; North-West University; Potchefstroom South Africa
| | - A. Hayami
- Laboratory of Toxicology; Department of Environmental Veterinary Sciences; Graduate School of Veterinary Medicine; Hokkaido University; Kita-ku Sapporo Japan
| | - H. Mizukawa
- Department of Environmental Veterinary Sciences; Graduate School of Veterinary Medicine; Hokkaido University; Kita-ku Sapporo Japan
| | - W. S. Darwish
- Laboratory of Toxicology; Department of Environmental Veterinary Sciences; Graduate School of Veterinary Medicine; Hokkaido University; Kita-ku Sapporo Japan
- Food Control Department; Faculty of Veterinary Medicine; Zagazig University; Zagazig Egypt
| | - K. P. Watanabe
- Laboratory of Toxicology; Department of Environmental Veterinary Sciences; Graduate School of Veterinary Medicine; Hokkaido University; Kita-ku Sapporo Japan
| | - Y. K. Kawai
- Laboratory of Toxicology; Department of Environmental Veterinary Sciences; Graduate School of Veterinary Medicine; Hokkaido University; Kita-ku Sapporo Japan
- Diagnostic Center for Animal Health and Food Safety; Obihiro University of Agriculture and Veterinary Medicine; Obihiro Japan
| | - M. Ishizuka
- Laboratory of Toxicology; Department of Environmental Veterinary Sciences; Graduate School of Veterinary Medicine; Hokkaido University; Kita-ku Sapporo Japan
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Zielinski J, Mevissen M. Inhibition of in vitro metabolism of testosterone in human, dog and horse liver microsomes to investigate species differences. Toxicol In Vitro 2015; 29:468-78. [DOI: 10.1016/j.tiv.2014.12.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 12/18/2014] [Accepted: 12/24/2014] [Indexed: 10/24/2022]
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Heterologous expression of equine CYP3A94 and investigation of a tunable system to regulate co-expressed NADPH P450 oxidoreductase levels. PLoS One 2014; 9:e113540. [PMID: 25415624 PMCID: PMC4240602 DOI: 10.1371/journal.pone.0113540] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Accepted: 10/28/2014] [Indexed: 02/07/2023] Open
Abstract
The activity of cytochrome P450 enzymes depends on the enzyme NADPH P450 oxidoreductase (POR). The aim of this study was to investigate the activity of the equine CYP3A94 using a system that allows to regulate the POR protein levels in mammalian cells. CYP3A94 and the equine POR were heterologously expressed in V79 cells. In the system used, the POR protein regulation is based on a destabilizing domain (DD) that transfers its instability to a fused protein. The resulting fusion protein is therefore degraded by the ubiquitin-proteasome system (UPS). Addition of “Shield-1” prevents the DD fusion protein from degradation. The change of POR levels at different Shield-1 concentrations was demonstrated by cytochrome c reduction, Western immunoblot analysis, and immunocytochemistry. The alteration of CYP3A94 activity was investigated using a substrate (BFC) known to detect CYP3A4 activity. Equine CYP3A94 was demonstrated to be metabolically active and its activity could be significantly elevated by co-expression of POR. Cytochrome c reduction was significantly increased in V79-CYP3A94/DD-POR cells compared to V79-CYP3A94 cells. Surprisingly, incubation with different Shield-1 concentrations resulted in a decrease in POR protein shown by Western immunoblot analysis. Cytochrome c reduction did not change significantly, but the CYP3A94 activity decreased more than 4-fold after incubation with 500 nM and 1 µM Shield-1 for 24 hours. No differences were obtained when V79-CYP3A94 POR cells with and without Shield-1 were compared. The basal activity levels of V79-CYP3A94/DD-POR cells were unexpectedly high, indicating that DD/POR is not degraded without Shield-1. Shield-1 decreased POR protein levels and CYP3A94 activity suggesting that Shield-1 might impair POR activity by an unknown mechanism. Although regulation of POR with the pPTuner system could not be obtained, the cell line V79-CYP3A94/DD-POR system can be used for further experiments to characterize the equine CYP3A94 since the CYP activity was significantly enhanced with co-expressed POR.
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