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Truong VL, Jun M, Jeong WS. Phytochemical and Over-The-Counter Drug Interactions: Involvement of Phase I and II Drug-Metabolizing Enzymes and Phase III Transporters. J Med Food 2021; 24:786-805. [PMID: 34382862 DOI: 10.1089/jmf.2021.k.0003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Consumption of plant-derived natural products and over-the-counter (OTC) drugs is increasing on a global scale, and studies of phytochemical-OTC drug interactions are becoming more significant. The intake of dietary plants and herbs rich in phytochemicals may affect drug-metabolizing enzymes (DMEs) and transporters. These effects may lead to alterations in pharmacokinetics and pharmacodynamics of OTC drugs when concomitantly administered. Some phytochemical-drug interactions benefit patients through enhanced efficacy, but many interactions cause adverse effects. This review discusses possible mechanisms of phytochemical-OTC drug interactions mediated by phase I and II DMEs and phase III transporters. In addition, current information is summarized for interactions between phytochemicals derived from fruits, vegetables, and herbs and OTC drugs, and counseling is provided on appropriate and safe use of OTC drugs.
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Affiliation(s)
- Van-Long Truong
- Food and Bio-Industry Research Institute, School of Food Science and Biotechnology, College of Agriculture and Life Sciences, Kyungpook National University, Daegu, Korea
| | - Mira Jun
- Brain Busan 21 Plus Program, Department of Food Science and Nutrition, Graduate School, Center for Silver-Targeted Biomaterials, Dong-A University, Busan, Korea
| | - Woo-Sik Jeong
- Food and Bio-Industry Research Institute, School of Food Science and Biotechnology, College of Agriculture and Life Sciences, Kyungpook National University, Daegu, Korea
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A Pharmacokinetic Interaction Study of Sorafenib and Iced Teas in Rats Using UPLC-MS/MS: An Illustration of Beverage-Drug Interaction. BIOMED RESEARCH INTERNATIONAL 2019; 2019:2410845. [PMID: 31871933 PMCID: PMC6907072 DOI: 10.1155/2019/2410845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 09/01/2019] [Accepted: 10/22/2019] [Indexed: 11/18/2022]
Abstract
Iced teas (ITs), also known as ready-to-drink teas, have gained much popularity among many nations. The modulatory effect of tea beverages on CYP3A4 increases the possibility of their potential interactions with many coadministered medications. Being a substrate of CYP3A4, sorafenib (SOR), the first-line therapy for the treatment of hepatocellular carcinoma, shows a great probability to exhibit pharmacokinetic (PK) interaction with ITs. For this purpose, different groups of Wistar rats were given oral doses of SOR (40 mg/kg), along with different types of ITs. The concentration of SOR in rat plasma was determined using UPLC-MS/MS. Chromatographic analysis was performed on a C18 analytical column, Acquity UPLC BEH™ (100 × 1.0 mm, i.d., 1.7 μm particle size), using erlotinib (ERL) as an internal standard. Isocratic elution was performed with a mobile phase consisting of two solvents: solvent A (water with 0.1% formic acid) and solvent B (acetonitrile with 0.1% formic acid), in a ratio of 30 : 70, v/v, respectively. Quantitation was performed using MRM of the transitions from protonated precursor ions [M+H]+ to product ions at m/z 465.12 > 252.02 (SOR) and m/z 394.29 > 278.19 (ERL). The method was fully validated as per the FDA guidance for bioanalytical method validation in the concentration range of 2.5–500 ng/mL. Different PK parameters were calculated for SOR in all rat groups and groups administered with ITs and SOR, compared with groups with simply water and SOR. Experimental data revealed that ITs caused a general reduction in SOR bioavailability; an approximate reduction of 30% was recorded for all types of tested ITs. These data indicate that ITs could affect the PK profile of SOR in rats.
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Gaaied S, Oliveira M, Le Bihanic F, Cachot J, Banni M. Gene expression patterns and related enzymatic activities of detoxification and oxidative stress systems in zebrafish larvae exposed to the 2,4-dichlorophenoxyacetic acid herbicide. CHEMOSPHERE 2019; 224:289-297. [PMID: 30825855 DOI: 10.1016/j.chemosphere.2019.02.125] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 02/15/2019] [Accepted: 02/20/2019] [Indexed: 06/09/2023]
Abstract
The present study aims to assess the effects of 2,4-D herbicide on biotransformation and oxidative stress status of zebrafish larvae. Animals were exposed to a range of sublethal concentrations (0.02-0.8 mg/L) and biomarkers at transcriptomic level and biochemical level were assessed. Chemical analysis with showed that the bioaccumulation of 2,4-D in 96 hpf zebrafish larvae were increased in a concentration-dependent manner. This herbicide induced significant effects at both gene expression and enzymatic activities levels after at 96 hpf. Results of mRNA expression showed a differential transcription regulation with all target genes depending on the tested concentrations. The mRNA level of gsr and cyp1a were up regulated at the highest dose of herbicide (0.8 mg/L). The gene expression of gstp1 showed an up regulation at lower dose (0.02 mg/L) and a down regulation at the highest dose (0.8 mg/L) of 2,4-D. A significant induction of EROD activity and inhibition of GST activity were noted in groups exposed to 0.8 mg/L of 2,4-D. Considering the antioxidant defenses, the activity of CAT was increased in larvae exposed to 0.8 mg/L of herbicide and GPx activity was induced at lower doses of 2,4-D (0.02 and 0.051 mg/L). Moreover, peroxidative damage, assessed as MDA content, was markedly increased in larvae exposed to high 2,4-D concentration. Overall, the present study data indicate that bioaccumulation of 2,4-D in 96 hpf zebrafish larvae and alterations in detoxification and oxidative stress related parameters, likely associated with ROS production, which may endanger the embryo-larval stages development of fish.
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Affiliation(s)
- Sonia Gaaied
- Laboratory of Biochemistry and Environmental Toxicology, ISA, Chott-Mariem, Sousse, Tunisia
| | - Miguel Oliveira
- Department of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
| | - Florane Le Bihanic
- University Bordeaux, Laboratory of Oceanic and Continental Environments and Paleoenvironments, EPOC, UMR 5805, F-33600, Pessac, France
| | - Jérôme Cachot
- University Bordeaux, Laboratory of Oceanic and Continental Environments and Paleoenvironments, EPOC, UMR 5805, F-33600, Pessac, France
| | - Mohamed Banni
- Laboratory of Biochemistry and Environmental Toxicology, ISA, Chott-Mariem, Sousse, Tunisia.
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Wang C, Ku P, Nie X, Bao S, Wang Z, Li K. Effects of simvastatin on the PXR signaling pathway and the liver histology in Mugilogobius abei. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 651:399-409. [PMID: 30240922 DOI: 10.1016/j.scitotenv.2018.09.133] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 08/21/2018] [Accepted: 09/10/2018] [Indexed: 06/08/2023]
Abstract
Simvastatin is one of the most commonly cholesterol-lowering prescribed drugs all over the world. With the increase of consumption of these pharmaceuticals and subsequent their discharge into the aquatic environment in recent years, they are present at detectable levels in most sewage effluents. Unfortunately, limited information is provided about their potential impacts on aquatic organisms, especially on the detoxification-related metabolism in fish. In the present study, one local native benthic fish (Mugilogobius abei) in southern China was employed as test species and exposed to SV (0.5 μg L-1, 5 μg L-1, 50 μg L-1 and 500 μg L-1) for 72 h. The transcriptional expression of nucleus transcriptional factor pregnane X receptor (PXR) and its downstream targeted genes including multixenobiotics resistance protein or permeability glycoprotein (P-gp), cytochrome 1A (CYP1A), cytochrome P450 3A (CYP3A), glutathione-S-transferase (GST) and the expression of associated microRNA such as miR-27, miR-34 and miR-148 in Mugilogobius abei were investigated. Result showed that the expressions of P-gp, CYP 1A, CYP 3A, GST and PXR were induced to some extend under simvastatin exposure for 72 h. A positive correlation was observed between PXR and CYP1A, CYP3A and P-gp. While for microRNA, a negative relationship was found between miR-34a and CYP3A, CYP1A. The expression of miR-148a was significantly induced under the exposure of SV (50 μg L-1), which was positive related to the transcriptional expression of PXR. For enzyme activity, erythromycin N-demethylase (ERND) significantly increased at 24 h and the activity of catalase (CAT) and superoxide dismutase (SOD) exhibited different trends. CAT was slightly inhibited at 24 h exposure but SOD was significantly induced in high concentration. Glutathione-S-transferase (GST) activity was significant inhibited after 72 h exposure. The reductive small molecule glutathione (GSH) content showed obvious decrease, while the quantity of malondialdehyde (MDA) increased significantly in high concentrations of SV exposure. GSH and MDA showed a typical negative correlation to some degree. Moreover, simvastatin caused histological changes in the liver tissues of M. abei, especially the size of adipocyte significantly decreased. The present study indicated that environmentally relevant concentration SV may affect the PXR signaling pathway in M. abei and pose potential ecological risks to non-target organisms like fish.
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Affiliation(s)
- Chao Wang
- Department of Ecology/Hydrobiology Research Institute, Jinan University, Guangzhou 510632, China
| | - Peijia Ku
- Department of Ecology/Hydrobiology Research Institute, Jinan University, Guangzhou 510632, China
| | - Xiangping Nie
- Department of Ecology/Hydrobiology Research Institute, Jinan University, Guangzhou 510632, China; Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China.
| | - Shuang Bao
- Department of Ecology/Hydrobiology Research Institute, Jinan University, Guangzhou 510632, China
| | - Zhaohui Wang
- Department of Ecology/Hydrobiology Research Institute, Jinan University, Guangzhou 510632, China
| | - Kaibin Li
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
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Illés P, Grycová A, Krasulová K, Dvořák Z. Effects of Flavored Nonalcoholic Beverages on Transcriptional Activities of Nuclear and Steroid Hormone Receptors: Proof of Concept for Novel Reporter Cell Line PAZ-PPARg. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:12066-12078. [PMID: 30394742 DOI: 10.1021/acs.jafc.8b05158] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We developed and characterized a novel human luciferase reporter cell line for the assessment of peroxisome proliferator-activated receptor γ (PPARγ) transcriptional activity, PAZ-PPARg. The luciferase activity induced by PPARγ endogenous agonist 15d-PGJ2 and prostaglandin PGD2 reached mean values of (87.9 ± 14.0)-fold and (89.6 ± 19.7)-fold after 24 h of exposure to 40 μM 15d-PGJ2 and 70 μM PGD2, respectively. A concentration-dependent inhibition of 15d-PGJ2- and PGD2-induced luciferase activity was observed after the application of T0070907, a selective antagonist of PPARγ, which confirms the specificity of response to both agonists. The PAZ-PPARg cell line, along with the reporter cell lines for the assessment of transcriptional activities of thyroid receptor (TR), vitamin D3 receptor (VDR), androgen receptor (AR), and glucocorticoid receptor (GR), were used for the screening of 27 commonly marketed flavored nonalcoholic beverages for their possible disrupting effects. Our findings indicate that some of the examined beverages have the potential to modulate the transcriptional activities of PPARγ, VDR, and AR.
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Affiliation(s)
- Peter Illés
- Regional Centre of Advanced Technologies and Materials, Faculty of Science , Palacky University , Slechtitelu 27 , 783 71 Olomouc , Czech Republic
| | - Aneta Grycová
- Regional Centre of Advanced Technologies and Materials, Faculty of Science , Palacky University , Slechtitelu 27 , 783 71 Olomouc , Czech Republic
| | - Kristýna Krasulová
- Regional Centre of Advanced Technologies and Materials, Faculty of Science , Palacky University , Slechtitelu 27 , 783 71 Olomouc , Czech Republic
| | - Zdeněk Dvořák
- Regional Centre of Advanced Technologies and Materials, Faculty of Science , Palacky University , Slechtitelu 27 , 783 71 Olomouc , Czech Republic
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Ku P, Wang C, Nie X, Ou R, Li K. Regulation of pregnane-X-receptor and microRNAs on detoxification-related genes expressions in Mugilogobius abei under the exposure to diclofenac. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 233:395-406. [PMID: 29096313 DOI: 10.1016/j.envpol.2017.10.080] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 09/08/2017] [Accepted: 10/22/2017] [Indexed: 06/07/2023]
Abstract
Diclofenac (DCF) has been recognized as an emerging contaminant in aquatic environments. Though many studies have investigated the toxic effects of DCF in human and mammals, limited information is available for the responses of genes associated with detoxification metabolisms in non-target aquatic organisms such as fish. In the present study, a small benthic fish Mugilogobius abei, was chosen as the test organism and the effects of DCF on detoxification-related genes at transcriptional level in M. abei were investigated. Partial cDNAs of pregnane-X-receptor (pxr), cytochrome P450 3A (cyp 3a) and alpha-gst were cloned firstly. The responses of cyp 1a, cyp 3a, alpha-gst and p-gp genes and associated microRNAs expressions were measured under different concentrations of DCF exposure (0.5, 5, 50, 500 μg/L) for 24 h and 168 h. Induction of cyp 1a, cyp 3a, alpha-gst, p-gp and pxr mRNA expressions was observed under DCF exposure for different time. Positive concentration-response relationships between DCF concentrations and cyp 1a as well as alpha-gst mRNA expression were observed under DCF exposure for 24 h. The similar trend between pxr mRNA expression and cyp 3a gene expression suggested the role of pxr in regulation of its downstream detoxification genes involved in DCF detoxification in M. abei. The negative correlation between miR-27a and p-gp expression under DCF exposure for 24 h indicated the role of miRNA in post transcriptional regulation on detoxification-related genes mRNAs in M. abei exposed to DCF. Overall, DCF exposure, even at environmental levels, may interrupt the responses of the detoxification genes in M. abei, which may affect the response of the exposed organism to other pollutants. This work provides implications on the bio-monitoring and risk assessment of DCF in aquatic ecosystems by using of local native fish species.
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Affiliation(s)
- Peijia Ku
- Department of Ecology, Jinan University, Guangzhou 510632, China
| | - Chao Wang
- Department of Ecology, Jinan University, Guangzhou 510632, China
| | - Xiangping Nie
- Department of Ecology, Jinan University, Guangzhou 510632, China; Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China.
| | - Ruikang Ou
- Department of Ecology, Jinan University, Guangzhou 510632, China
| | - Kaibing Li
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China.
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Sousa C, Andrade PB, Valentão P. Relationships of Echium plantagineum L. bee pollen, dietary flavonoids and their colonic metabolites with cytochrome P450 enzymes and oxidative stress. RSC Adv 2016. [DOI: 10.1039/c5ra26736f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Echium plantagineumL. bee pollen is a dietary source of flavonoids, which can play a protective role in the gastrointestinal tract by modulating cytochrome P450 (CYP) biotransformation enzymes and by opposing oxidative stress.
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Affiliation(s)
- C. Sousa
- REQUIMTE/LAQV
- Laboratório de Farmacognosia
- Departamento de Química
- Faculdade de Farmácia
- Universidade do Porto
| | - P. B. Andrade
- REQUIMTE/LAQV
- Laboratório de Farmacognosia
- Departamento de Química
- Faculdade de Farmácia
- Universidade do Porto
| | - P. Valentão
- REQUIMTE/LAQV
- Laboratório de Farmacognosia
- Departamento de Química
- Faculdade de Farmácia
- Universidade do Porto
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Ma J, Bu Y, Li Y, Niu D, Li X. Complementary DNA Cloning and Functional Characterization of Cytochrome P450 3A138 in Common Carp (Cyprinus carpioL.). J Biochem Mol Toxicol 2014; 28:239-45. [DOI: 10.1002/jbt.21559] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 01/28/2014] [Accepted: 02/07/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Junguo Ma
- College of Life Science; Henan Normal University; Xinxiang Henan 453007 People's Republic of China
| | - Yanzhen Bu
- College of Life Science; Henan Normal University; Xinxiang Henan 453007 People's Republic of China
| | - Yao Li
- College of Life Science; Henan Normal University; Xinxiang Henan 453007 People's Republic of China
| | - Daichun Niu
- College of Life Science; Henan Normal University; Xinxiang Henan 453007 People's Republic of China
| | - Xiaoyu Li
- College of Life Science; Henan Normal University; Xinxiang Henan 453007 People's Republic of China
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Effects of artificial sweeteners on the AhR- and GR-dependent CYP1A1 expression in primary human hepatocytes and human cancer cells. Toxicol In Vitro 2013; 27:2283-8. [DOI: 10.1016/j.tiv.2013.10.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2013] [Revised: 07/03/2013] [Accepted: 10/02/2013] [Indexed: 11/18/2022]
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Li X, Ma J, Jing C, Wang J. Expression alterations of cytochromes P4501A1, 2E1, and 3A, and their receptors AhR and PXR caused by 1-octyl-3-methylimidazolium chloride in mouse mammary carcinoma cells. CHEMOSPHERE 2013; 93:2488-2492. [PMID: 24094773 DOI: 10.1016/j.chemosphere.2013.08.092] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Revised: 08/16/2013] [Accepted: 08/22/2013] [Indexed: 06/02/2023]
Abstract
Cytochrome P450s (CYPs) play a key role in the metabolism of a wide range of environmental xenobiotics and endogenous compounds. The expression and activity levels of CYPs can be elevated by a process of induction involving the activation of nuclear receptors. The effects of the ionic liquid 1-octyl-3-methylimidazolium chloride ([C(8)mim][Cl]) on the expression of cytochrome P450 members, including CYP1A1, CYP2E1, and CYP3A, as well as on aryl hydrocarbon receptor (AhR) and pregnane X receptor (PXR) in mouse mammary carcinoma cells (EMT6) were investigated by using quantitative real-time PCR in the present study. The results reveal that [C(8)mim][Cl]-exposure up-regulates the expressions of CYP1A1, CYP2E1, and CYP3A at mRNA level, suggesting that imidazolium-based ionic liquids can activate CYPs. Our results also suggest that [C(8)mim][Cl]-mediated CYP3A induction be PXR-dependent. This result may be beneficial to evaluating the environmental toxicity of imidazolium-based ionic liquids and investigating the metabolism of imidazolium-derivative drugs.
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Affiliation(s)
- Xiaoyu Li
- College of Life Science, Henan Normal University, Xinxiang, Henan 453007, China.
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Kamenickova A, Anzenbacherova E, Pavek P, Soshilov AA, Denison MS, Anzenbacher P, Dvorak Z. Pelargonidin activates the AhR and induces CYP1A1 in primary human hepatocytes and human cancer cell lines HepG2 and LS174T. Toxicol Lett 2013; 218:253-9. [PMID: 23419638 PMCID: PMC3644221 DOI: 10.1016/j.toxlet.2013.01.020] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 01/24/2013] [Accepted: 01/25/2013] [Indexed: 10/27/2022]
Abstract
We examined the effects of anthocyanidins (cyanidin, delphinidin, malvidin, peonidin, petunidin, pelargonidin) on the aryl hydrocarbon receptor (AhR)-CYP1A1 signaling pathway in human hepatocytes, hepatic HepG2 and intestinal LS174T cancer cells. AhR-dependent reporter gene expression in transfected HepG2 cells was increased by pelargonidin in a concentration-dependent manner at 24h. Similarly, pelargonidin induced the expression of CYP1A1 mRNA up to 5-fold in HepG2 and LS174T cells relative to the induction by 5 nM 2,3,7,8-tetrachlorodibenzodioxin (TCDD), the most potent activator of AhR. CYP1A1 and CYP1A2 mRNAs were also increased by pelargonidin in three primary human hepatocytes cultures (approximately 5% of TCDD potency) and the increase in CYP1A1 protein in HepG2 and LS174T cells was comparable to the increase in catalytic activity of CYP1A1 enzyme. Ligand binding analysis demonstrated that pelargonidin was a weak ligand of AhR. Enzyme kinetic analyses using human liver microsomes revealed inhibition of CYP1A1 activity by delphinidin (IC50 78 μM) and pelargonidin (IC50 33 μM). Overall, although most anthocyanidins had no effects on AhR-CYP1A1 signaling, pelargonidin can bind to and activate the AhR and AhR-dependent gene expression, and pelargonidin and delphinidin inhibit the CYP1A1 catalytic activity.
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Affiliation(s)
- Alzbeta Kamenickova
- Department of Cell Biology and Genetics, Faculty of Science, Palacky University, Slechtitelu 11, 783 71 Olomouc, Czech Republic
| | - Eva Anzenbacherova
- Institute of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacky University, Hnevotinska 3, 775 15 Olomouc, Czech Republic
| | - Petr Pavek
- Department of Pharmacology and Toxicology, Charles University in Prague, Faculty of Pharmacy in Hradec Kralove, Heyrovskeho 1203, Hradec Kralove 50005, Czech Republic
| | - Anatoly A. Soshilov
- Department of Environmental Toxicology, University of California, Meyer Hall, One Shields Avenue, Davis, CA 95616-8588, USA
| | - Michael S. Denison
- Department of Environmental Toxicology, University of California, Meyer Hall, One Shields Avenue, Davis, CA 95616-8588, USA
| | - Pavel Anzenbacher
- Institute of Pharmacology, Faculty of Medicine and Dentistry, Palacky University, Hnevotinska 3, 775 15 Olomouc, Czech Republic
| | - Zdenek Dvorak
- Department of Cell Biology and Genetics, Faculty of Science, Palacky University, Slechtitelu 11, 783 71 Olomouc, Czech Republic
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Abstract
INTRODUCTION Tea, made from the dried leaves of the plant Camellia sinensis Theaceae, is a very popular beverage consumed worldwide. Recently, green tea extract-based dietary supplements have also been widely consumed for the acclaimed beneficial health effects, such as weight reduction. Although tea consumption is considered to be innocuous, the potential interactions between tea polyphenols and drugs have been demonstrated in studies in vitro and in vivo. AREAS COVERED This article reviews the current literature on the chemistry and biotransformation of tea constituents, mainly catechins from green tea. The article also provides a review of their effects on the absorption, efflux, metabolism and elimination of different drugs. EXPERT OPINION Tea catechins may bind to certain drugs to affect their absorption and bioactivities. Tea catechins may inhibit the activities of drug-metabolizing enzymes and drug transporters or affect the expression of these proteins, either upregulation or downregulation. Although these effects have been demonstrated in studies in vitro and in animal models, such effects have only been observed in limited cases in humans at common doses of human tea consumption. The ingestion of tea catechins from dietary supplements, which could be in large bullet doses, may produce more profound effects on drug metabolism, and such effects with drugs need to be further investigated.
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Affiliation(s)
- Chung S Yang
- The State University of New Jersey, Ernest Mario School of Pharmacy, Department of Chemical Biology, Rutgers, Piscataway, NJ 08854-8020, USA.
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