Influence of diet supplementation with green tea extract on drug-metabolizing enzymes in a mouse model of monosodium glutamate-induced obesity
Language English Country Germany Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
25663641
DOI
10.1007/s00394-015-0856-7
PII: 10.1007/s00394-015-0856-7
Knihovny.cz E-resources
- Keywords
- Catechins, Drug-metabolizing enzymes, Green tea extract, Metabolic syndrome, Obesity,
- MeSH
- Antioxidants pharmacology MeSH
- Aryl Hydrocarbon Hydroxylases genetics metabolism MeSH
- Tea chemistry MeSH
- Cytochrome P-450 CYP2E1 genetics metabolism MeSH
- Cytochrome P-450 CYP3A genetics metabolism MeSH
- Enzyme-Linked Immunosorbent Assay MeSH
- Sodium Glutamate adverse effects MeSH
- Insulin blood MeSH
- Liver drug effects metabolism MeSH
- Leptin blood MeSH
- RNA, Messenger genetics metabolism MeSH
- Disease Models, Animal MeSH
- Mice, Obese MeSH
- Mice MeSH
- Obesity chemically induced drug therapy MeSH
- Dietary Supplements * MeSH
- Cytochrome P450 Family 2 MeSH
- Plant Extracts pharmacology MeSH
- Dose-Response Relationship, Drug MeSH
- Animals MeSH
- Check Tag
- Male MeSH
- Mice MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Antioxidants MeSH
- Aryl Hydrocarbon Hydroxylases MeSH
- Tea MeSH
- Cyp2a5 protein, mouse MeSH Browser
- Cytochrome P-450 CYP2E1 MeSH
- Cytochrome P-450 CYP3A MeSH
- cytochrome P450 3A4, mouse MeSH Browser
- Sodium Glutamate MeSH
- Insulin MeSH
- Leptin MeSH
- RNA, Messenger MeSH
- Cytochrome P450 Family 2 MeSH
- Plant Extracts MeSH
PURPOSE: Consumption of dietary supplements with green tea extract (GTE) is popular for weight management, but it may be accompanied by various side effects, including interactions with drugs. The aim of the present in vivo study was to evaluate the effect of defined GTE (Polyphenon 60) in three dosage schemes on insulin, leptin and drug-metabolizing enzymes in obese mice. METHODS: Experimental obesity was induced by repeated s.c. application of monosodium glutamate to newborn mice. Green tea extract was administered in three dosage schemes in chow diet. The plasmatic levels of insulin and leptin were assayed using enzyme-linked immunosorbent assay. Enzyme activities and mRNA expressions of drug-metabolizing enzymes (totally 13) were analyzed in liver and small intestine using spectrophotometric and HPLC assays and RT-PCR, respectively. RESULTS: GTE-treatment decreased insulin and leptin levels. Eleven enzymes were significantly affected by GTE-treatment. Long-term administration of 0.01% GTE caused increase in the activity and mRNA level of cytochrome P450 3A4 (CYP3A4) ortholog in the liver as well as in the small intestine. Interestingly, short-term overdose by GTE (0.1%) had more pronounced effects on enzyme activities and mRNA expressions than long-term overdose. CONCLUSIONS: GTE-mediated induction of CYP3A4 ortholog, the main drug-metabolizing enzyme, could result in decreased efficacy of simultaneously or subsequently administered drug in obese individuals.
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