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Yao C, Dai S, Wang C, Fu K, Wu R, Zhao X, Yao Y, Li Y. Luteolin as a potential hepatoprotective drug: Molecular mechanisms and treatment strategies. Biomed Pharmacother 2023; 167:115464. [PMID: 37713990 DOI: 10.1016/j.biopha.2023.115464] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/04/2023] [Accepted: 09/07/2023] [Indexed: 09/17/2023] Open
Abstract
Luteolin is a flavonoid widely present in various traditional Chinese medicines. In recent years, luteolin has received more attention due to its impressive liver protective effect, such as metabolic associated fatty liver disease, hepatic fibrosis and hepatoma. This article summarizes the pharmacological effects, pharmacokinetic characteristics, and toxicity of luteolin against liver diseases, and provides prospect. The results indicate that luteolin improves liver lesions through various mechanisms, including inhibiting inflammatory factors, reducing oxidative stress, regulating lipid balance, slowing down excessive aggregation of extracellular matrix, inducing apoptosis and autophagy of liver cancer cells. Pharmacokinetics research manifested that due to metabolic effects, the bioavailability of luteolin is relatively low. It is worth noting that appropriate modification, new delivery systems, and derivatives can enhance its bioavailability. Although many studies have shown that the toxicity of luteolin is minimal, strict toxicity experiments are still needed to evaluate its safety and promote its reasonable development. In addition, this study also discussed the clinical applications related to luteolin, indicating that it is a key component of commonly used liver protective drugs in clinical practice. In view of its excellent pharmacological effects, luteolin is expected to become a potential drug for the treatment of various liver diseases.
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Affiliation(s)
- Chenhao Yao
- State Key Laboratory of Southwestern Chinese Medicine Resources, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Shu Dai
- State Key Laboratory of Southwestern Chinese Medicine Resources, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Cheng Wang
- State Key Laboratory of Southwestern Chinese Medicine Resources, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Ke Fu
- State Key Laboratory of Southwestern Chinese Medicine Resources, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Rui Wu
- State Key Laboratory of Southwestern Chinese Medicine Resources, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Xingtao Zhao
- State Key Laboratory of Southwestern Chinese Medicine Resources, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Yuxin Yao
- State Key Laboratory of Southwestern Chinese Medicine Resources, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Yunxia Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, Key Laboratory of Standardization for Chinese Herbal Medicine, Ministry of Education, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
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Application Potential of Luteolin in the Treatment of Viral Pneumonia. J Food Biochem 2023. [DOI: 10.1155/2023/1810503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
Aim of the Review. This study aims to summarize the therapeutic effect of luteolin on the pathogenesis of viral pneumonia, explore its absorption and metabolism in the human body, evaluate the possibility of luteolin as a drug to treat viral pneumonia, and provide a reference for future research. Materials and Methods. We searched MEDLINE/PubMed, Web of Science, China National Knowledge Infrastructure, and Google Scholar and collected research on luteolin in the treatment of viral pneumonia and related diseases since 2003. Then, we summarized the efficacy and potential of luteolin in directly inhibiting viral activity, limiting inflammatory storms, reducing pulmonary inflammation, and treating pneumonia complications. Results and Conclusion. Luteolin has the potential to treat viral pneumonia in multiple ways. Luteolin has a direct inhibitory effect on coronavirus, influenza virus, and respiratory syncytial virus. Luteolin can alleviate the inflammatory factor storm induced by multiple factors by inhibiting the function of macrophages or mast cells. Luteolin can reduce pulmonary inflammation, pulmonary edema, or pulmonary fibrosis induced by multiple factors. In addition, viral pneumonia may cause multisystem complications, while luteolin has extensive protective effects on the gastrointestinal system, cardiovascular system, and nervous system. However, due to the first-pass metabolism mediated by phase II enzymes, the bioavailability of oral luteolin is low. The bioavailability of luteolin can be improved, and its potential value can be further developed by changing the dosage form or route of administration.
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Li X, Yang W, Chen H, Pan F, Liu W, Qi D, Yu S, Liu H, Chai X, Liu Y, Pan Y, Wang G. Rapid screening and in vivo target occupancy quantitative evaluation of xanthine oxidase inhibitors based on drug-target binding kinetics research strategy: A case study of Chrysanthemum morifolium Ramat. Biomed Pharmacother 2023; 161:114379. [PMID: 36827711 DOI: 10.1016/j.biopha.2023.114379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/26/2023] [Accepted: 02/05/2023] [Indexed: 02/24/2023] Open
Abstract
Chrysanthemum morifolium Ramat. is a kind of food and drug dual-use traditional Chinese medicine possessing multiple pharmacological and biochemical benefits. In our study, a rapid and high-throughput method based on Surface plasmon resonance (SPR) biosensor technology was developed and verified for screening potential xanthine oxidase (XOD) inhibitors exemplarily in the Chrysanthemum morifolium Ramat. Coupled with ultra-high performance liquid chromatography-electrospray ionization-tandem mass spectrometry (UPLC-ESI-MS), 14 XOD-binders were identified. In the SPR-based biosensor and molecular docking analysis, most compounds exhibited a strong affinity and binding kinetic property (association rate constant, Kon and dissociation rate constant, Koff) for XOD and could be regarded as potential inhibitors. More importantly, to further accurately assess target occupancy of candidate compounds in vivo, a mathematical model was established and verified involving three crucial intrinsic kinetic processes (Pharmacokinetics, Binding kinetic and Target kinetic). Overall, the proposed screening and assessment strategy could be proved an effective theoretical basis for further pharmacodynamic evaluation.
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Affiliation(s)
- Xueyan Li
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Wenning Yang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Hongjiao Chen
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Fulu Pan
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Wei Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Dongying Qi
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Shuang Yu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Huining Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Xiaoyu Chai
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Yang Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China.
| | - Yanli Pan
- Institute of Information on Traditional Chinese Medicine China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Guopeng Wang
- Zhongcai Health (Beijing) Biological Technology Development Co., Ltd., Beijing 101500, China.
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Bioavailability Assessment of Yarrow Phenolic Compounds Using an In Vitro Digestion/Caco-2 Cell Model: Anti-Inflammatory Activity of Basolateral Fraction. Molecules 2022; 27:molecules27238254. [PMID: 36500344 PMCID: PMC9740014 DOI: 10.3390/molecules27238254] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/21/2022] [Accepted: 11/22/2022] [Indexed: 11/29/2022] Open
Abstract
In this study, a combined in vitro digestion/Caco-2 model was performed with the aim to determine the phenolic compounds bioavailability of two yarrow extracts. HPLC-PAD characterisation indicated that the main components in both extracts were 3,5-dicaffeoylquinic acid (DCQA) and luteolin-7-O-glucoside. Analyses after the simulated digestion process revealed that phenolic composition was not affected during the oral phase, whereas gastric and intestinal phases represented critical steps for some individual phenolics, especially intestinal step. The transition from gastric medium to intestinal environment caused an important degradation of 3,5-DCQA (63-67% loss), whereas 3,4-DCQA and 4,5-DCQA increased significantly, suggesting an isomeric transformation within these caffeic acid derivatives. However, an approx. 90% of luteolin-7-O-glucoside was recovered after intestinal step. At the end of Caco-2 absorption experiments, casticin, diosmetin and centaureidin represented the most abundant compounds in the basolateral fraction. Moreover, this fraction presented anti-inflammatory activity since was able to inhibit the secretion of IL-1β and IL-6 pro-inflammatory cytokines. Thus, the presence in the basolateral fraction of flavonoid-aglycones from yarrow, could be related with the observed anti-inflammatory activity from yarrow extract.
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Hydroxyl-riched covalent organic framework for solid-phase microextraction of flavonoids aglycones or their metabolites in mice's plasma: Luteolin and quercetagetin as examples. J Chromatogr A 2022; 1681:463478. [PMID: 36099693 DOI: 10.1016/j.chroma.2022.463478] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/25/2022] [Accepted: 09/04/2022] [Indexed: 11/20/2022]
Abstract
Herein, a hydroxyl‑riched covalent organic framework (named COF-DES-1) was synthesized using 1,3,5-tris(4-aminophenyl)benzene and 2,5-dihydroxyterephthalaldehyde as building blocks and employed as a coating of solid-phase microextraction (SPME) fiber. Ascribed to the advantages (e.g. suitable pore size and rich functional group characteristics) of coating, the SPME fiber showed good adsorption capacities to flavonoids aglycones including luteolin and quercetagetin, and the maximum adsorption capacities for them were 145.31 µg and 84.75 µg, respectively. Due to the size exclusion property of COF-DES-1, SPME fiber showed good protein exclusion effects on seven selected proteins with high exclusion efficiencies (>93%). Accordingly, an attractive strategy of the combination of COF-DES-1 based SPME fiber and HPLC-MS/MS was proposed for the extraction and determination of luteolin, quercetagetin or their metabolites. The results revealed that the fiber can be effectively applied to extract luteolin and its metabolites, and quercetagetin from mice's palsma. Compared with the traditional protein precipitation methods, the extraction effects of SPME fiber based extraction method were much better, indicating the promising applicability of the fiber for the enrichment of flavonoids aglycones or their metabolites in biological samples.
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Hofmann J, Spatz P, Walther R, Gutmann M, Maurice T, Decker M. Synthesis and Biological Evaluation of Flavonoid‐Cinnamic Acid Amide Hybrids with Distinct Activity against Neurodegeneration in Vitro and in Vivo. Chemistry 2022; 28:e202200786. [PMID: 35621167 PMCID: PMC9400986 DOI: 10.1002/chem.202200786] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Indexed: 11/10/2022]
Abstract
Flavonoids are polyphenolic natural products and have shown significant potential as disease‐modifying agents against neurodegenerative disorders like Alzheimer's disease (AD), with activities even in vivo. Hybridization of the natural products taxifolin and silibinin with cinnamic acid led to an overadditive effect of these compounds in several phenotypic screening assays related to neurodegeneration and AD. Therefore, we have exchanged the flavonoid part of the hybrids with different flavonoids, which show higher efficacy than taxifolin or silibinin, to improve the activity of the respective hybrids. Chemical connection between the flavonoid and cinnamic acid was realized by an amide instead of a labile ester bond to improve stability towards hydrolysis. To investigate the influence of a double bond at the C‐ring of the flavonoid, the dehydro analogues of the respective hybrids were also synthesized. All compounds obtained show neuroprotection against oxytosis, ferroptosis and ATP‐depletion, respectively, in the murine hippocampal cell line HT22. Interestingly, the taxifolin and the quercetin derivatives are the most active compounds, whereby the quercetin derivate shows even more pronounced activity than the taxifolin one in all assays applied. As aimed for, no hydrolysis product was found in cellular uptake experiments after 4 h whereas different metabolites were detected. Furthermore, the quercetin‐cinnamic acid amide showed pronounced activity in an in vivo AD mouse model at a remarkably low dose of 0.3 mg/kg.
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Affiliation(s)
- Julian Hofmann
- Pharmaceutical and Medicinal Chemistry Institute of Pharmacy and Food Chemistry University of Würzburg Am Hubland 97074 Würzburg Germany
| | - Philipp Spatz
- Pharmaceutical and Medicinal Chemistry Institute of Pharmacy and Food Chemistry University of Würzburg Am Hubland 97074 Würzburg Germany
| | - Rasmus Walther
- Pharmaceutical and Medicinal Chemistry Institute of Pharmacy and Food Chemistry University of Würzburg Am Hubland 97074 Würzburg Germany
| | - Marcus Gutmann
- Drug Formulation and Delivery Institute of Pharmacy and Food Chemistry University of Würzburg Am Hubland 97074 Würzburg Germany
| | - Tangui Maurice
- MMDN University of Montpellier, EPHE, INSERM 34095 Montpellier France
| | - Michael Decker
- Pharmaceutical and Medicinal Chemistry Institute of Pharmacy and Food Chemistry University of Würzburg Am Hubland 97074 Würzburg Germany
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Ye L, Xin Y, Wu ZY, Sun HJ, Huang DJ, Sun ZQ. A Newly Synthesized Flavone from Luteolin Escapes from COMT-Catalyzed Methylation and Inhibits Lipopolysaccharide-Induced Inflammation in RAW264.7 Macrophages via JNK, p38 and NF-κB Signaling Pathways. J Microbiol Biotechnol 2022; 32:15-26. [PMID: 34099595 PMCID: PMC9628824 DOI: 10.4014/jmb.2104.04027] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/13/2021] [Accepted: 05/25/2021] [Indexed: 12/15/2022]
Abstract
Luteolin is a common dietary flavone possessing potent anti-inflammatory activities. However, when administrated in vivo, luteolin becomes methylated by catechol-O-methyltransferases (COMT) owing to the catechol ring in the chemical structure, which largely diminishes its anti-inflammatory effect. In this study, we made a modification on luteolin, named LUA, which was generated by the chemical reaction between luteolin and 2,2'-azobis(2-amidinopropane) dihydrochloride (AAPH). Without a catechol ring in the chemical structure, this new flavone could escape from the COMT-catalyzed methylation, thus affording the potential to exert its functions in the original form when administrated in the organism. Moreover, an LPS-stimulated RAW cell model was applied to detect the anti-inflammatory properties. LUA showed much more superior inhibitory effect on LPS-induced production of NO than diosmetin (a major methylated form of luteolin) and significantly suppressed upregulation of iNOS and COX-2 in macrophages. LUA treatment dramatically reduced LPS-stimulated reactive oxygen species (ROS) and mRNA levels of pro-inflammatory mediators such as IL-1β, IL-6, IL-8 and IFN-β. Furthermore, LUA significantly reduced the phosphorylation of JNK and p38 without affecting that of ERK. LUA also inhibited the activation of NF-κB through suppression of p65 phosphorylation and nuclear translocation.
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Affiliation(s)
- Lin Ye
- School of Pharmacy, Changzhou University, Changzhou 213164, P.R. China,Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
| | - Yang Xin
- Food Science and Technology Program, Department of Chemistry, Faculty of Science, National University of Singapore, Singapore 117597, Singapore
| | - Zhi-yuan Wu
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
| | - Hai-jian Sun
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
| | - De-jian Huang
- Food Science and Technology Program, Department of Chemistry, Faculty of Science, National University of Singapore, Singapore 117597, Singapore,National University of Singapore (Suzhou) Research Institute, Suzhou, Jiangsu 215123, P.R. China
| | - Zhi-qin Sun
- School of Pharmacy, Changzhou University, Changzhou 213164, P.R. China,Changzhou Second People's Hospital, Changzhou 213000, P.R. China,Corresponding author Phone: +13861285688 E-mail:
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Tremmel M, Paetz C, Heilmann J. In Vitro Liver Metabolism of Six Flavonoid C-Glycosides. Molecules 2021; 26:molecules26216632. [PMID: 34771041 PMCID: PMC8587677 DOI: 10.3390/molecules26216632] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/20/2021] [Accepted: 10/26/2021] [Indexed: 11/16/2022] Open
Abstract
Several medical plants belonging to the genera Passiflora, Viola, and Crataegus accumulate flavonoid C-glycosides, which likely contribute to their efficacy. Information regarding their phase I and II metabolism in the liver are lacking. Thus, in vitro liver metabolism of orientin, isoorientin, schaftoside, isoschaftoside, vitexin, and isovitexin, all of which accumulated in Passiflora incarnata L., was investigated by incubation in subcellular systems with human liver microsomes and human liver S9 fraction. All metabolite profiles were comprehensively characterized using HPLC-DAD and UHPLC–MS/MS analysis. Mono-glycosylic flavones of the luteolin-type orientin and isoorientin showed a broad range of mono-glucuronidated and mono-sulfated metabolites, whereas for mono-glycosylic flavones of the apigenin-type vitexin and isovitexin, only mono-glucuronidates could be detected. For di-glycosylic flavones of the apigenin-type schaftosid and isoschaftosid, no phase I or II metabolites were identified. The main metabolite of isoorientin was isolated using solid-phase extraction and prep. HPLC-DAD and identified as isoorientin-3′-O-α-glucuronide by NMR analysis. A second isolated glucuronide was assigned as isoorientin 4′-O-α-glucuronide. These findings indicate that vitexin and isovitexin are metabolized preferentially by uridine 5′-diphospho glucuronosyltransferases (UGTs) in the liver. As only orientin and isoorientin showed mono-sulfated and mono-glucuronidated metabolites, the dihydroxy group in 3′,4′-position may be essential for additional sulfation by sulfotransferases (SULTs) in the liver. The diglycosylic flavones schaftoside and isoschaftoside are likely not accepted as substrates of the used liver enzymes under the chosen conditions.
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Affiliation(s)
- Martina Tremmel
- Department of Chemistry and Pharmacy, Institute of Pharmaceutical Biology, University of Regensburg, Universitätsstraße 31, D-93053 Regensburg, Germany;
| | - Christian Paetz
- Research Group Biosynthesis/NMR, Max-Planck-Institute for Chemical Ecology, Hans-Knöll-Str. 8, 07745 Jena, Germany;
| | - Jörg Heilmann
- Department of Chemistry and Pharmacy, Institute of Pharmaceutical Biology, University of Regensburg, Universitätsstraße 31, D-93053 Regensburg, Germany;
- Correspondence: ; Tel.: +49-941-943-4759
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Chaturvedi S, Malik MY, Sultana N, Jahan S, Singh S, Taneja I, Raju KSR, Rashid M, Wahajuddin M. Chromatographic separation and estimation of natural antimalarial flavonoids in biological matrices. PROCEEDINGS OF THE INDIAN NATIONAL SCIENCE ACADEMY 2021. [DOI: 10.1007/s43538-021-00050-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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10
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Luteolin and cancer metastasis suppression: focus on the role of epithelial to mesenchymal transition. Med Oncol 2021; 38:66. [PMID: 33950369 DOI: 10.1007/s12032-021-01508-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 04/05/2021] [Indexed: 02/07/2023]
Abstract
Epithelial to mesenchymal transition (EMT) is a physiological process that assumes a primary role in the induction of cancer metastasis. This results in increased cell renewal, and resistance to cell death and therapies. EMT, therefore, represents an effective strategy for regulating cancerous cell activity. A need for efficacy and low cytotoxicity epithelial to mesenchymal transition modifying drugs has led to the investigational testing of the efficacy of plethora of different groups of phytonutrients. Luteolin is a natural flavonoid inhibits the growth of cancer cells by various mechanisms, such as the stimulation of cancer cell apoptosis, cell cycle arrest, inhibition of cell replication, tumor growth, improvement of drug resistance, prevention of cancer cell intrusiveness and metastasis. This review article focuses on the anti-cancer and anti-metastatic potential of luteolin targeting various transcription factors, markers and signaling pathways associated with the repression of epithelial to mesenchymal transition.
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Chrysoeriol Prevents TNFα-Induced CYP19 Gene Expression via EGR-1 Downregulation in MCF7 Breast Cancer Cells. Int J Mol Sci 2020; 21:ijms21207523. [PMID: 33053908 PMCID: PMC7588959 DOI: 10.3390/ijms21207523] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 10/08/2020] [Accepted: 10/09/2020] [Indexed: 01/06/2023] Open
Abstract
Estrogen overproduction is closely associated with the development of estrogen receptor-positive breast cancer. Aromatase, encoded by the cytochrome P450 19 (CYP19) gene, regulates estrogen biosynthesis. This study aimed to identify active flavones that inhibit CYP19 expression and to explore the underlying mechanisms. CYP19 expression was evaluated using reverse transcription PCR, quantitative real-time PCR, and immunoblot analysis. The role of transcription factor early growth response gene 1 (EGR-1) in CYP19 expression was assessed using the short-hairpin RNA (shRNA)-mediated knockdown of EGR-1 expression in estrogen receptor-positive MCF-7 breast cancer cells. We screened 39 flavonoids containing 26 flavones and 13 flavanones using the EGR1 promoter reporter activity assay and observed that chrysoeriol exerted the highest inhibitory activity on tumor necrosis factor alpha (TNFα)-induced EGR-1 expression. We further characterized and demonstrated that chrysoeriol inhibits TNFα-induced CYP19 expression through inhibition of extracellular signal-regulated kinase 1/2 (ERK1/2)-mediated EGR-1 expression. Chrysoeriol may be beneficial as a dietary supplement for the prevention of estrogen receptor-positive breast cancer, or as a chemotherapeutic adjuvant in the treatment of this condition.
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Farooqi AA, Butt G, El-Zahaby SA, Attar R, Sabitaliyevich UY, Jovic JJ, Tang KF, Naureen H, Xu B. Luteolin mediated targeting of protein network and microRNAs in different cancers: Focus on JAK-STAT, NOTCH, mTOR and TRAIL-mediated signaling pathways. Pharmacol Res 2020. [DOI: https://doi.org/10.1016/j.phrs.2020.105188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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13
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Farooqi AA, Butt G, El-Zahaby SA, Attar R, Sabitaliyevich UY, Jovic JJ, Tang KF, Naureen H, Xu B. Luteolin mediated targeting of protein network and microRNAs in different cancers: Focus on JAK-STAT, NOTCH, mTOR and TRAIL-mediated signaling pathways. Pharmacol Res 2020; 160:105188. [PMID: 32919041 DOI: 10.1016/j.phrs.2020.105188] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/21/2020] [Accepted: 08/28/2020] [Indexed: 02/07/2023]
Abstract
There has always been a keen interest of basic and clinical researchers to search for cancer therapeutics having minimum off-target effects and maximum anticancer activities. In accordance with this approach, there has been an explosion in the field of natural products research in the past few decades because of extra-ordinary list of natural extracts and their biologically and pharmacologically active constituents having significant medicinal properties. Apparently, luteolin-mediated anticancer effects have been investigated in different cancers but there is superfluousness of superficial data. Generalized scientific evidence encompassing apoptosis, DNA damage and anti-inflammatory effects has been reported extensively. However, how luteolin modulates deregulated oncogenic pathways in different cancers has not been comprehensively uncovered. In this review we have attempted to focus on cutting-edge research which has unveiled remarkable abilities of luteolin to modulate deregulated oncogenic pathways in different cancers. We have partitioned the review into various sections to separately discuss advancements in therapeutic targeting of oncogenic protein networks. We have provided detailed mechanistic insights related to JAK-STAT signaling and summarized how luteolin inhibited STAT proteins to inhibit STAT-driven gene network. We have also individually analyzed Wnt/β-catenin and NOTCH pathway and how luteolin effectively targeted these pathways. Mapping of the signaling landscape has revealed that NOTCH pathway can be targeted therapeutically. NOTCH pathway was noted to be targeted by luteolin. We have also conceptually analyzed how luteolin restored TRAIL-induced apoptosis in resistant cancers. Luteolin induced an increase in pro-apoptotic proteins and efficiently inhibited anti-apoptotic proteins to induce apoptosis. Luteolin mediated regulation of non-coding RNAs is an exciting and emerging facet. Excitingly, there is sequential and systematic accumulation of clues which have started to shed light on intricate regulation of microRNAs by luteolin in different cancers. Collectively, sophisticated information will enable us to develop a refined understanding of the multi-layered regulation of signaling pathways and non-coding RNAs by luteolin in different cancers.
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Affiliation(s)
- Ammad Ahmad Farooqi
- Institute of Biomedical and Genetic Engineering (IBGE), Islamabad, 44000, Pakistan.
| | | | - Sally A El-Zahaby
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy and Drug Manufacturing, Pharos University in Alexandria, Alexandria, Egypt
| | - Rukset Attar
- Department of Obstetrics and Gynecology, Yeditepe University, Turkey
| | - Uteuliyev Yerzhan Sabitaliyevich
- Department of Health Policy and Health Care Development, Kazakh Medical University of Continuing Education, Almaty, 050004, Kazakhstan
| | - Jovana Joksimovic Jovic
- Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, SvetozaraMarkovića 69, 34000, Kragujevac, Serbia
| | - Kai-Fu Tang
- Digestive Cancer Center, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325015, Zhejiang, China
| | - Humaira Naureen
- Faculty of Pharmaceutical Sciences, Riphah International University, Islamabad, Pakistan
| | - Baojun Xu
- Food Science and Technology Program, BNU-HKBU United International College, Zhuhai, 519087, Guangdong, China.
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Mohos V, Fliszár-Nyúl E, Poór M. Inhibition of Xanthine Oxidase-Catalyzed Xanthine and 6-Mercaptopurine Oxidation by Flavonoid Aglycones and Some of Their Conjugates. Int J Mol Sci 2020; 21:ijms21093256. [PMID: 32380641 PMCID: PMC7246923 DOI: 10.3390/ijms21093256] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 04/21/2020] [Accepted: 05/04/2020] [Indexed: 12/21/2022] Open
Abstract
Flavonoids are natural phenolic compounds, which are the active ingredients in several dietary supplements. It is well-known that some flavonoid aglycones are potent inhibitors of the xanthine oxidase (XO)-catalyzed uric acid formation in vitro. However, the effects of conjugated flavonoid metabolites are poorly characterized. Furthermore, the inhibition of XO-catalyzed 6-mercaptopurine oxidation is an important reaction in the pharmacokinetics of this antitumor drug. The inhibitory effects of some compounds on xanthine vs. 6-mercaptopurine oxidation showed large differences. Nevertheless, we have only limited information regarding the impact of flavonoids on 6-mercaptopurine oxidation. In this study, we examined the interactions of flavonoid aglycones and some of their conjugates with XO-catalyzed xanthine and 6-mercaptopurine oxidation in vitro. Diosmetin was the strongest inhibitor of uric acid formation, while apigenin showed the highest effect on 6-thiouric acid production. Kaempferol, fisetin, geraldol, luteolin, diosmetin, and chrysoeriol proved to be similarly strong inhibitors of xanthine and 6-mercaptopurine oxidation. While apigenin, chrysin, and chrysin-7-sulfate were more potent inhibitors of 6-mercaptopurine than xanthine oxidation. Many flavonoids showed similar or stronger (even 5- to 40-fold) inhibition of XO than the positive control allopurinol. Based on these observations, the extremely high intake of flavonoids may interfere with the elimination of 6-mercaptopurine.
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Affiliation(s)
- Violetta Mohos
- Department of Pharmacology, Faculty of Pharmacy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary; (V.M.); (E.F.-N.)
- János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624 Pécs, Hungary
| | - Eszter Fliszár-Nyúl
- Department of Pharmacology, Faculty of Pharmacy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary; (V.M.); (E.F.-N.)
- János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624 Pécs, Hungary
| | - Miklós Poór
- Department of Pharmacology, Faculty of Pharmacy, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary; (V.M.); (E.F.-N.)
- János Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, H-7624 Pécs, Hungary
- Correspondence: ; Tel.: +36-72-536-000 (ext. 35052)
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Meng C, Liu R, Wang W, Guo W, Ma H, Xie S, Liu Y, Wang C. Metabolic profiling comparison of isovitexin in normal and kidney stone model rats by ultra-high-performance liquid chromatography coupled to quadrupole time-of-flight mass spectrometry. J Sep Sci 2020; 43:2363-2379. [PMID: 32227654 DOI: 10.1002/jssc.201901169] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 03/21/2020] [Accepted: 03/21/2020] [Indexed: 01/02/2023]
Abstract
Isovitexin, a bioactive flavonoid constituent isolated from Desmodii Styracifolii, is considered an adjuvant for antiurolithiasis diseases. In this study, an ultra-high-performance liquid chromatography coupled with hybrid triple quadruple time-of-flight mass spectrometry method was developed to characterize and compare the metabolic profiling of isovitexin experimented on normal and kidney stone model rats. The comparative research indicated that 28 metabolites (18 phase I and 10 phase II) in normal rats and 33 metabolites (20 phase I and 13 phase II) in kidney stone model rats were initially identified. The results of relative quantitative determination reflected that the contents of metabolites produced by deglycosylation, reduction, and isomerization in kidney stone model rats were greater than those in healthy rats. Instead, the levels of oxidative and dehydrogenated metabolites in normal groups were higher than those in kidney stone model groups. The results of this study are valuable and important for understanding the metabolic process of isovitexin in clinical application, and especially the metabolism study in kidney stone model rats could provide a beneficial reference for the further search of effective substances associated with the treatment of kidney stones.
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Affiliation(s)
- Caifeng Meng
- Department of Pharmaceutical Analysis, School of Pharmacy, Hebei Medical University, Shijiazhuang, 050017, P. R. China
| | - Ruina Liu
- Department of Pharmaceutical Analysis, School of Pharmacy, Hebei Medical University, Shijiazhuang, 050017, P. R. China
| | - Wei Wang
- Experiment center, School of Pharmacy, Hebei Medical University, Shijiazhuang, 050017, P. R. China
| | - Wei Guo
- Department of Pharmaceutical Analysis, School of Pharmacy, Hebei Medical University, Shijiazhuang, 050017, P. R. China
| | - Hongyun Ma
- Department of Pharmaceutical Analysis, School of Pharmacy, Hebei Medical University, Shijiazhuang, 050017, P. R. China
| | - Shuang Xie
- Department of Pharmaceutical Analysis, School of Pharmacy, Hebei Medical University, Shijiazhuang, 050017, P. R. China
| | - Yimeng Liu
- Department of Pharmaceutical Analysis, School of Pharmacy, Hebei Medical University, Shijiazhuang, 050017, P. R. China
| | - Chunying Wang
- Department of Pharmaceutical Analysis, School of Pharmacy, Hebei Medical University, Shijiazhuang, 050017, P. R. China
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16
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Li N, Qiu J, Liu H, Chen Z, Qian Y. Thermoregulated extraction of luteolin under neutral conditions using oligo(ethylene glycol)-based magnetic nanoparticles with Wulff-type boronate affinity. J Chromatogr A 2019; 1607:460396. [PMID: 31471134 DOI: 10.1016/j.chroma.2019.460396] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 07/20/2019] [Accepted: 07/22/2019] [Indexed: 11/26/2022]
Abstract
Oligo(ethylene glycol)-based thermoresponsive polymers with Wulff-type boronate affinity were anchored on magnetic nanoparticles. The resultant magnetic nanoparticles were used as sorbents for extracting luteolin, a cis-diol-containing model analyte. By exploiting the thermoresponsive properties and Wulff-type boronate affinity of the sorbents, target adsorption at room temperature (25 °C) and target release at high temperature (40 °C) were achieved under neutral conditions without pH alteration. The proposed thermoregulated extraction method was favorable for automated boronate affinity extraction, preventing degradation of the target and avoiding acidic elution for breaking Wulff-type boronate sites. Compared to reported sorbents for extracting luteolin, the sorbents possessed higher maximum adsorption capacity (98.7 mg g-1) with acceptable sensitivity, simplified operation procedure, and mild extraction condition. Furthermore, the sorbents were applied in thermoregulated extraction of luteolin from honey samples. Satisfactory recoveries in the range of 83.2% - 89.1% with RSD ranging from 2.2% to 4.6% were achieved. The results demonstrated that this work provided a new research direction to design and synthesize efficient thermoresponsive materials for recognition and release of cis-diol compounds under neutral conditions.
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Affiliation(s)
- Nan Li
- Institute of Quality Standards and Testing Technology for Agro-Products, Key Laboratory of Agro-Product Quality and Safety, Chinese Academy of Agricultural Sciences, Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
| | - Jing Qiu
- Institute of Quality Standards and Testing Technology for Agro-Products, Key Laboratory of Agro-Product Quality and Safety, Chinese Academy of Agricultural Sciences, Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture and Rural Affairs, Beijing 100081, China.
| | - Huiying Liu
- School of Materials Science and Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China
| | - Zhijun Chen
- Institute of Quality Standards and Testing Technology for Agro-Products, Key Laboratory of Agro-Product Quality and Safety, Chinese Academy of Agricultural Sciences, Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
| | - Yongzhong Qian
- Institute of Quality Standards and Testing Technology for Agro-Products, Key Laboratory of Agro-Product Quality and Safety, Chinese Academy of Agricultural Sciences, Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
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17
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Zhu S, Lei S, Zhou S, Jin L, Zeng S, Jiang H, Zhou H. Luteolin shows antidepressant-like effect by inhibiting and downregulating plasma membrane monoamine transporter (PMAT, Slc29a4). J Funct Foods 2019. [DOI: 10.1016/j.jff.2019.01.048] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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18
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Aziz N, Kim MY, Cho JY. Anti-inflammatory effects of luteolin: A review of in vitro, in vivo, and in silico studies. JOURNAL OF ETHNOPHARMACOLOGY 2018; 225:342-358. [PMID: 29801717 DOI: 10.1016/j.jep.2018.05.019] [Citation(s) in RCA: 339] [Impact Index Per Article: 56.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 05/16/2018] [Accepted: 05/16/2018] [Indexed: 06/08/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Luteolin (3', 4', 5,7-tetrahydroxyflavone) has been identified as commonly present in plants. Plants with a high luteolin content have been used ethnopharmacologically to treat inflammation-related symptoms. Both isolated luteolin and extracts from luteolin-rich plants have been studied using various models and exhibited anti-inflammatory activity. AIM OF THE REVIEW This paper uses recent research findings with a broad range of study models to describe the anti-inflammatory activity of luteolin, particularly its mechanisms at the molecular level; provide guidance for future research; and evaluate the feasibility of developing luteolin into an anti-inflammatory drug. MATERIALS AND METHODS We summarize reports about the anti-inflammatory activity of luteolin published since 2009, which we found in MEDLINE/PubMed, Scopus, Web of Knowledge, and Google Scholar. To acquire broad information, we extended our search to online FDA documents. RESULTS Luteolin is a flavonoid commonly found in medicinal plants and has strong anti-inflammatory activity in vitro and in vivo. Some of its derivatives, such as luteolin-7-O-glucoside, have also shown anti-inflammatory activity. The action mechanism of luteolin varies, but Src in the nuclear factor (NF)-κB pathway, MAPK in the activator protein (AP)- 1 pathway, and SOCS3 in the signal transducer and activator of transcription 3 (STAT3) pathway are its major target transcription factors. A clinical trial with a formulation containing luteolin showed excellent therapeutic effect against inflammation-associated diseases. CONCLUSION In silico, in vitro, in vivo, and clinical studies strongly suggest that the major pharmacological mechanism of luteolin is its anti-inflammatory activity, which derives from its regulation of transcription factors such as STAT3, NF-κB, and AP-1. Much work remains to ensure the safety, quality, and efficacy of luteolin before it can be used to treat inflammation-related diseases in humans.
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Affiliation(s)
- Nur Aziz
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Mi-Yeon Kim
- School of Systems Biomedical Science, Soongsil University, Seoul 06978, Republic of Korea.
| | - Jae Youl Cho
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea.
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19
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Feng X, Li Y, Guang C, Qiao M, Wang T, Chai L, Qiu F. Characterization of the In Vivo and In Vitro Metabolites of Linarin in Rat Biosamples and Intestinal Flora Using Ultra-High Performance Liquid Chromatography Coupled with Quadrupole Time-of-Flight Tandem Mass Spectrometry. Molecules 2018; 23:E2140. [PMID: 30149616 PMCID: PMC6225362 DOI: 10.3390/molecules23092140] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 08/20/2018] [Accepted: 08/23/2018] [Indexed: 02/06/2023] Open
Abstract
Linarin, a flavone glycoside, is considered to be a promising natural product due to its diverse pharmacological activities, including analgesic, antipyretic, anti-inflammatory and hepatoprotective activities. In this research, the metabolites of linarin in rat intestinal flora and biosamples were characterized using ultra-high-performance liquid chromatography/quadrupole time-of-flight mass spectrometry (UPLC/Q-TOF-MS/MS). Three ring cleavage metabolites (4-hydroxybenzoic acid, 4-hydroxy benzaldehyde and phloroglucinol) were detected after linarin was incubated with rat intestinal flora. A total of 17 metabolites, including one ring cleavage metabolite (phloroglucinol), were identified in rat biosamples after oral administration of linarin. These results indicate that linarin was able to undergo ring fission metabolism in intestinal flora and that hydrolysis, demethylation, glucuronidation, sulfation, glycosylation, methylation and ring cleavage were the major metabolic pathways. This study provides scientific support for the understanding of the metabolism of linarin and contributes to the further development of linarin as a drug candidate.
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Affiliation(s)
- Xinchi Feng
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
| | - Yang Li
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
| | - Chenxi Guang
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
| | - Miao Qiao
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
| | - Tong Wang
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
| | - Liwei Chai
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
| | - Feng Qiu
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
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20
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Warnsmann V, Hainbuch S, Osiewacz HD. Quercetin-Induced Lifespan Extension in Podospora anserina Requires Methylation of the Flavonoid by the O-Methyltransferase PaMTH1. Front Genet 2018; 9:160. [PMID: 29780405 PMCID: PMC5945814 DOI: 10.3389/fgene.2018.00160] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Accepted: 04/17/2018] [Indexed: 12/12/2022] Open
Abstract
Quercetin is a flavonoid that is ubiquitously found in vegetables and fruits. Like other flavonoids, it is active in balancing cellular reactive oxygen species (ROS) levels and has a cyto-protective function. Previously, a link between ROS balancing, aging, and the activity of O-methyltransferases was reported in different organisms including the aging model Podospora anserina. Here we describe a role of the S-adenosylmethionine-dependent O-methyltransferase PaMTH1 in quercetin-induced lifespan extension. We found that effects of quercetin treatment depend on the methylation state of the flavonoid. Specifically, we observed that quercetin treatment increases the lifespan of the wild type but not of the PaMth1 deletion mutant. The lifespan increasing effect is not associated with effects of quercetin on mitochondrial respiration or ROS levels but linked to the induction of the PaMth1 gene. Overall, our data demonstrate a novel role of O-methyltransferase in quercetin-induced longevity and identify the underlying pathway as part of a network of longevity assurance pathways with the perspective to intervene into mechanisms of biological aging.
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Affiliation(s)
- Verena Warnsmann
- Molecular Developmental Biology, Institute of Molecular Biosciences and Cluster of Excellence Frankfurt Macromolecular Complexes, Department of Biosciences, J. W. Goethe University, Frankfurt, Germany
| | - Saskia Hainbuch
- Molecular Developmental Biology, Institute of Molecular Biosciences and Cluster of Excellence Frankfurt Macromolecular Complexes, Department of Biosciences, J. W. Goethe University, Frankfurt, Germany
| | - Heinz D Osiewacz
- Molecular Developmental Biology, Institute of Molecular Biosciences and Cluster of Excellence Frankfurt Macromolecular Complexes, Department of Biosciences, J. W. Goethe University, Frankfurt, Germany
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21
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Wang Y, Li Q, Dai Y, Pan R, Xia Y. Development of a LC–MS/MS method to investigate the interference of pharmacokinetics of the main constituents in Saxifraga stolonifera : Involvement of drug metabolism enzymes. J Pharm Biomed Anal 2018; 148:128-135. [DOI: 10.1016/j.jpba.2017.08.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 08/02/2017] [Accepted: 08/15/2017] [Indexed: 01/10/2023]
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22
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Karanewsky DS, Arthur AJ, Liu H, Chi B, Ida L. Toxicological evaluation and metabolism of two N-alkyl benzamide umami flavour compounds: N-(heptan-4-yl)benzo[d][1,3]dioxole-5-carboxamide and ( R)- N-(1-methoxy-4-methylpentan-2-yl)-3,4-dimethylbenzamide. Toxicol Rep 2017; 3:841-860. [PMID: 28959612 PMCID: PMC5616206 DOI: 10.1016/j.toxrep.2016.10.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 10/07/2016] [Accepted: 10/24/2016] [Indexed: 11/23/2022] Open
Abstract
Toxicological evaluations of two N-alkyl benzamide umami flavour compounds, N-(heptan-4-yl)benzo[d][1,3]dioxole-5-carboxamide (S807, CAS 745047-51-2) and (R)-N-(1-methoxy-4-methylpentan-2-yl)-3,4-dimethylbenzamide (S9229, CAS 851669-60-8), were completed for the purpose of assessing their safety for use in food and beverage applications. Both S807 and S9229 undergo rapid oxidative metabolism by both rat and human liver microsomes in vitro. In pharmacokinetic studies in rats, the systemic exposure to S9229 on oral administration is very low at all doses (% F < 1%), while that of S807 demonstrated a non-linear dose dependence. In metabolism studies in rats, hydroxylation of the C-4 aryl methyl group was found to be the dominant metabolic pathway for S9229. The dominant metabolic pathway for S807 in the rat involved oxidative scission of the methylenedioxy moiety to produce the corresponding 3,4-dihydroxybenamide which is further converted by Phase II metabolic enzymes to the 3- and 4-O-methyl ethers as well as their corresponding glucuronides. Both S807 and S9229 were not found to be mutagenic or clastogenic in vitro, and did not induce micronuclei in polychromatic erythrocytes in vivo. In a subchronic oral toxicity study in rats, the no-observed-effect-level (NOEL) for S807 was 20 mg/kg bw/day when administered in the diet for 13 weeks. The no-observed-adverse-effect-level (NOAEL) for S9229 in rats was 100 mg/kg bw/day (highest dose tested) when administered in the diet for 28 consecutive days.
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Key Words
- AUC, area under the curve
- CL, plasma clearance
- COMT, catechol-O-methyltransferase
- Cmax, peak plasma concentration
- FDA, Food and Drug Administration
- FEMA GRAS
- FEMA, Flavour and Extract Manufacturers Association of the United States
- FL-no, FLAVIS number
- GLP, good laboratory practices
- GMP, good manufacturing practices
- Genetic toxicological evaluation
- HPBL, human peripheral blood lymphocytes
- LC/MS, liquid chromatography with mass spectrometry
- MC, methylcellulose
- MRM, multiple-reaction monitoring
- MSG, monosodium glutamate
- MTD, maximum tolerated dose
- NOAEL, no-observed-adverse-effect-level
- NOEL, no-observed-effect-level
- OECD, Organization for Economic Cooperation and Development
- PK, pharmacokinetics
- RCG, relative cell growth
- RMI, relative mitotic index
- S807
- S9229
- Subchronic toxicological evaluation
- TK, toxicokinetics
- Tmax, time to reach Cmax
- Vss, volume of distribution at steady-state
- amu, atomic mass units
- t1/2, half-life
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Affiliation(s)
| | - Amy J Arthur
- Senomyx, Inc., 4767 Nexus Centre Drive, San Diego, CA 92121, United States
| | - Hanghui Liu
- Senomyx, Inc., 4767 Nexus Centre Drive, San Diego, CA 92121, United States
| | - Bert Chi
- Senomyx, Inc., 4767 Nexus Centre Drive, San Diego, CA 92121, United States
| | - Lily Ida
- Senomyx, Inc., 4767 Nexus Centre Drive, San Diego, CA 92121, United States
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23
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Pharmacokinetics, tissue distribution and excretion of luteolin and its major metabolites in rats: Metabolites predominate in blood, tissues and are mainly excreted via bile. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.05.056] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
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24
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Hostetler GL, Ralston RA, Schwartz SJ. Flavones: Food Sources, Bioavailability, Metabolism, and Bioactivity. Adv Nutr 2017; 8:423-435. [PMID: 28507008 PMCID: PMC5421117 DOI: 10.3945/an.116.012948] [Citation(s) in RCA: 348] [Impact Index Per Article: 49.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Flavones are a class of flavonoids that are a subject of increasing interest because of their biological activities in vitro and in vivo. This article reviews the major sources of flavones and their concentrations in food and beverages, which vary widely between studies. It also covers the roles of flavones in plants, the influence of growing conditions on their concentrations, and their stability during food processing. The absorption and metabolism of flavones are also reviewed, in particular the intestinal absorption of both O- and C-glycosides. Pharmacokinetic studies in both animals and humans are described, comparing differences between species and the effects of glycosylation on bioavailability. Biological activity in animal models and human dietary intervention studies is also reviewed. A better understanding of flavone sources and bioavailability is needed to understand mechanisms of action and nutritional intervention.
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Affiliation(s)
- Gregory L Hostetler
- Department of Food Science and Technology, The Ohio State University, Columbus, OH
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25
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Gao D, Wang DD, Zhang Q, Yang FQ, Xia ZN, Zhang QH, Yuan CS. In Vivo Selective Capture and Rapid Identification of Luteolin and Its Metabolites in Rat Livers by Molecularly Imprinted Solid-Phase Microextraction. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:1158-1166. [PMID: 28111945 DOI: 10.1021/acs.jafc.6b05269] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A method based on molecularly imprinted solid-phase microextraction (MIP-SPME) coupled with liquid chromatography-quadrupole time-of-flight tandem mass spectrometry (QTOF-MS/MS) was developed for the detection of luteolin and its metabolites in vivo. The MIP-SPME fibers were first fabricated by dopamine and silane, and then luteolin MIPs-coated fibers were successfully prepared using luteolin, acrylamide (AM), and ethylene glycol dimethacrylate (EGDMA) as the template, functional monomer and cross-linker, respectively. The characterizations of polymers were analyzed by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and the Brunauer-Emmett-Teller method (BET). The properties involving adsorption and selective experiments were evaluated, and these results revealed that MIP fibers presented high adsorption capacity and selectivity to luteolin. Furthermore, the developed MIP-SPME coupled with the LC-QTOF-MS/MS method was adopted to capture and identify luteolin and its metabolites in rat livers in vivo, and eventually, apigenin, chrysoeriol, and diosmetin were rapidly identified as metabolites.
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Affiliation(s)
- Die Gao
- School of Pharmaceutical Sciences, Chongqing University , Chongqing 400030, China
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University , Luzhou, Sichuan 646000, China
- School of Chemistry and Chemical Engineering, Chongqing University , Chongqing 400030, China
| | - Dan-Dan Wang
- School of Pharmaceutical Sciences, Chongqing University , Chongqing 400030, China
| | - Qian Zhang
- School of Chemistry and Chemical Engineering, Chongqing University , Chongqing 400030, China
| | - Feng-Qing Yang
- School of Chemistry and Chemical Engineering, Chongqing University , Chongqing 400030, China
| | - Zhi-Ning Xia
- School of Pharmaceutical Sciences, Chongqing University , Chongqing 400030, China
- School of Chemistry and Chemical Engineering, Chongqing University , Chongqing 400030, China
| | - Qi-Hui Zhang
- School of Chemistry and Chemical Engineering, Chongqing University , Chongqing 400030, China
| | - Chun-Su Yuan
- Tang Center for Herbal Medicine Research and Department of Anesthesia & Critical Care, University of Chicago , Chicago, Illinois 60637, United States
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26
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Ha SK, Lee JA, Cho EJ, Choi I. Effects of CatecholO-Methyl Transferase Inhibition on Anti-Inflammatory Activity of Luteolin Metabolites. J Food Sci 2017; 82:545-552. [DOI: 10.1111/1750-3841.13620] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 12/09/2016] [Accepted: 12/13/2016] [Indexed: 11/29/2022]
Affiliation(s)
- Sang Keun Ha
- Research Group of Nutraceuticals for Metabolic Syndrome; Korea Food Research Inst.; Gyeonggi 463-746 Republic of Korea
| | - Jin-Ah Lee
- Research Group of Nutraceuticals for Metabolic Syndrome; Korea Food Research Inst.; Gyeonggi 463-746 Republic of Korea
| | - Eun Jung Cho
- Research Group of Nutraceuticals for Metabolic Syndrome; Korea Food Research Inst.; Gyeonggi 463-746 Republic of Korea
| | - Inwook Choi
- Research Group of Nutraceuticals for Metabolic Syndrome; Korea Food Research Inst.; Gyeonggi 463-746 Republic of Korea
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27
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Wang L, Chen Q, Zhu L, Li Q, Zeng X, Lu L, Hu M, Wang X, Liu Z. Metabolic Disposition of Luteolin Is Mediated by the Interplay of UDP-Glucuronosyltransferases and Catechol-O-Methyltransferases in Rats. Drug Metab Dispos 2016; 45:306-315. [PMID: 28031430 DOI: 10.1124/dmd.116.073619] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 12/27/2016] [Indexed: 11/22/2022] Open
Abstract
Luteolin partially exerts its biologic effects via its metabolites catalyzed by UDP-glucuronosyltransferases (UGTs) and catechol-O-methyltransferases (COMTs). However, the interplay of UGTs and COMTs in mediating luteolin disposition has not been well clarified. In this study, we investigated the glucuronidation and methylation pathways of luteolin mediated by the interplay of UGTs and COMTs in vivo and in vitro. A total of nine luteolin metabolites was detected in rat plasma and bile by liquid chromatography-tandem mass spectrometry, namely, three glucuronides, two methylated metabolites, and four methylated glucuronides. Luteolin-3'-glucuronide (Lut-3'-G) exhibited the highest systemic exposure among these metabolites. Kinetics studies in rat liver S9 fractions suggested two pathways, as follows: 1) Luteolin was glucuronidated to luteolin-7-glucuronide, luteolin-4'-glucuronide, and Lut-3'-G by UGTs, and then Lut-7-G was methylated to chrysoeriol-7-glucuronide and diosmetin-7-glucuronide by COMTs. 2) Alternatively, luteolin was methylated to chrysoeriol and diosmetin by COMTs, and then chrysoeriol and diosmetin were glucuronidated by UGTs to their respective glucuronides. The methylation rate of luteolin was significantly increased by the absence of glucuronidation, whereas the glucuronidation rate was increased by the absence of methylation, but to a lesser extent. In conclusion, two pathways mediated by the interplay of UGTs and COMTs are probably involved in the metabolic disposition of luteolin. The glucuronidation and methylation of luteolin compensate for each other, although glucuronidation is the predominant pathway.
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Affiliation(s)
- Liping Wang
- First Affiliated Hospital of the Medical College, Shihezi University, Shihezi, Xinjiang, PR China (L.W., Q.C., X.Z., X.W.); International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, PR China (L.W., L.Z., L.L., M.H., Z.L.); Department of Pharmacy, Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong, PR China (Q.L.); and College of Pharmacy, University of Houston, Houston, Texas (M.H.)
| | - Qingwei Chen
- First Affiliated Hospital of the Medical College, Shihezi University, Shihezi, Xinjiang, PR China (L.W., Q.C., X.Z., X.W.); International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, PR China (L.W., L.Z., L.L., M.H., Z.L.); Department of Pharmacy, Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong, PR China (Q.L.); and College of Pharmacy, University of Houston, Houston, Texas (M.H.)
| | - Lijun Zhu
- First Affiliated Hospital of the Medical College, Shihezi University, Shihezi, Xinjiang, PR China (L.W., Q.C., X.Z., X.W.); International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, PR China (L.W., L.Z., L.L., M.H., Z.L.); Department of Pharmacy, Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong, PR China (Q.L.); and College of Pharmacy, University of Houston, Houston, Texas (M.H.)
| | - Qiang Li
- First Affiliated Hospital of the Medical College, Shihezi University, Shihezi, Xinjiang, PR China (L.W., Q.C., X.Z., X.W.); International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, PR China (L.W., L.Z., L.L., M.H., Z.L.); Department of Pharmacy, Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong, PR China (Q.L.); and College of Pharmacy, University of Houston, Houston, Texas (M.H.)
| | - Xuejun Zeng
- First Affiliated Hospital of the Medical College, Shihezi University, Shihezi, Xinjiang, PR China (L.W., Q.C., X.Z., X.W.); International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, PR China (L.W., L.Z., L.L., M.H., Z.L.); Department of Pharmacy, Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong, PR China (Q.L.); and College of Pharmacy, University of Houston, Houston, Texas (M.H.)
| | - Linlin Lu
- First Affiliated Hospital of the Medical College, Shihezi University, Shihezi, Xinjiang, PR China (L.W., Q.C., X.Z., X.W.); International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, PR China (L.W., L.Z., L.L., M.H., Z.L.); Department of Pharmacy, Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong, PR China (Q.L.); and College of Pharmacy, University of Houston, Houston, Texas (M.H.)
| | - Ming Hu
- First Affiliated Hospital of the Medical College, Shihezi University, Shihezi, Xinjiang, PR China (L.W., Q.C., X.Z., X.W.); International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, PR China (L.W., L.Z., L.L., M.H., Z.L.); Department of Pharmacy, Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong, PR China (Q.L.); and College of Pharmacy, University of Houston, Houston, Texas (M.H.)
| | - Xinchun Wang
- First Affiliated Hospital of the Medical College, Shihezi University, Shihezi, Xinjiang, PR China (L.W., Q.C., X.Z., X.W.); International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, PR China (L.W., L.Z., L.L., M.H., Z.L.); Department of Pharmacy, Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong, PR China (Q.L.); and College of Pharmacy, University of Houston, Houston, Texas (M.H.)
| | - Zhongqiu Liu
- First Affiliated Hospital of the Medical College, Shihezi University, Shihezi, Xinjiang, PR China (L.W., Q.C., X.Z., X.W.); International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, PR China (L.W., L.Z., L.L., M.H., Z.L.); Department of Pharmacy, Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong, PR China (Q.L.); and College of Pharmacy, University of Houston, Houston, Texas (M.H.)
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Sak K. The Val158Met polymorphism in COMT gene and cancer risk: role of endogenous and exogenous catechols. Drug Metab Rev 2016; 49:56-83. [PMID: 27826992 DOI: 10.1080/03602532.2016.1258075] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Catechol-O-methyltransferase, COMT, is an important phase II enzyme catalyzing the transfer of a methyl-group from S-adenosylmethionine to a catechol-containing substrate molecule. A genetic variant Val158Met in the COMT gene leads to a several-fold decrease in the enzymatic activity giving rise to the accumulation of potentially carcinogenic endogenous catechol estrogens and their reactive intermediates and increasing thus the risk of tumorigenesis. However, numerous association studies between the COMT genotype and susceptibility to various malignancies have shown inconsistent and controversial findings indicating that additional gene-gene and gene-environment interactions might be crucial in modulating the physiological role of the COMT. In this review article, the important contribution of dietary catechol-containing flavonoids to modification of the relationships between the COMT genotype and cancer risk is discussed. Whereas, the diverse anticancer activities of common phytochemicals, such as green tea polyphenols, quercetin, fisetin or luteolin, can be markedly changed (both decreased or increased) by the COMT-mediated O-methylation of these exogenous substrates, flavonoids can also behave as potent inhibitors of the COMT enzyme slowing detoxification of endogenous catechol estrogens. Such a many-featured functioning of the COMT and its complex regulation by several different genetic and environmental factors, including plant-based food ingredients, emphasizes the necessity to further stratify the association studies between the COMT genotype and tumor risk by consumption of catechol-containing dietary flavonoids. Currently, it can be only speculated that some of the possible associations might be masked by the regular intake of specific food polyphenols, taking effect in certain communities or populations.
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Affiliation(s)
- Katrin Sak
- a Department of Hematology and Oncology , Institute of Clinical Medicine, University of Tartu , Tartu , Estonia
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Zeng X, Shi J, Zhao M, Chen Q, Wang L, Jiang H, Luo F, Zhu L, Lu L, Wang X, Liu Z. Regioselective Glucuronidation of Diosmetin and Chrysoeriol by the Interplay of Glucuronidation and Transport in UGT1A9-Overexpressing HeLa Cells. PLoS One 2016; 11:e0166239. [PMID: 27832172 PMCID: PMC5104480 DOI: 10.1371/journal.pone.0166239] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 10/25/2016] [Indexed: 12/23/2022] Open
Abstract
This study aimed to determine the reaction kinetics of the regioselective glucuronidation of diosmetin and chrysoeriol, two important methylated metabolites of luteolin, by human liver microsomes (HLMs) and uridine-5′-diphosphate glucuronosyltransferase (UGTs) enzymes. This study also investigated the effects of breast cancer resistance protein (BCRP) on the efflux of diosmetin and chrysoeriol glucuronides in HeLa cells overexpressing UGT1A9 (HeLa—UGT1A9). After incubation with HLMs in the presence of UDP-glucuronic acid, diosmetin and chrysoeriol gained two glucuronides each, and the OH—in each B ring of diosmetin and chrysoeriol was the preferable site for glucuronidation. Screening assays with 12 human expressed UGT enzymes and chemical-inhibition assays demonstrated that glucuronide formation was almost exclusively catalyzed by UGT1A1, UGT1A6, and UGT1A9. Importantly, in HeLa—UGT1A9, Ko143 significantly inhibited the efflux of diosmetin and chrysoeriol glucuronides and increased their intracellular levels in a dose-dependent manner. This observation suggested that BCRP-mediated excretion was the predominant pathway for diosmetin and chrysoeriol disposition. In conclusion, UGT1A1, UGT1A6, and UGT1A9 were the chief contributors to the regioselective glucuronidation of diosmetin and chrysoeriol in the liver. Moreover, cellular glucuronidation was significantly altered by inhibiting BCRP, revealing a notable interplay between glucuronidation and efflux transport. Diosmetin and chrysoeriol possibly have different effects on anti-cancer due to the difference of UGT isoforms in different cancer cells.
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Affiliation(s)
- Xuejun Zeng
- Department of Pharmacy, First Hospital Affiliated to Shihezi University, Shihezi, Xinjiang, 832002, China.,International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China
| | - Jian Shi
- International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China
| | - Min Zhao
- International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China
| | - Qingwei Chen
- Department of Pharmacy, First Hospital Affiliated to Shihezi University, Shihezi, Xinjiang, 832002, China.,International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China
| | - Liping Wang
- International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China
| | - Huangyu Jiang
- International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China
| | - Feifei Luo
- International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China
| | - Lijun Zhu
- International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China
| | - Linlin Lu
- International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China
| | - Xinchun Wang
- Department of Pharmacy, First Hospital Affiliated to Shihezi University, Shihezi, Xinjiang, 832002, China
| | - Zhongqiu Liu
- International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510006, China
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30
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Structure related effects of flavonoid aglycones on cell cycle progression of HepG2 cells: Metabolic activation of fisetin and quercetin by catechol-O-methyltransferase (COMT). Biomed Pharmacother 2016; 83:998-1005. [DOI: 10.1016/j.biopha.2016.08.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 08/02/2016] [Accepted: 08/05/2016] [Indexed: 01/16/2023] Open
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31
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Lee H, Kim DS, Ha SK, Choi I, Lee JM, Sung JH. A pumpless multi-organ-on-a-chip (MOC) combined with a pharmacokinetic-pharmacodynamic (PK-PD) model. Biotechnol Bioeng 2016; 114:432-443. [PMID: 27570096 DOI: 10.1002/bit.26087] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 07/09/2016] [Accepted: 08/21/2016] [Indexed: 12/15/2022]
Abstract
A multi-organ-on-a-chip (MOC), also known as a human-on-a-chip, aims to simulate whole body response to drugs by connecting microscale cell cultures of multiple tissue types via fluidic channels and reproducing the interaction between them. While several studies have demonstrated the usefulness of MOC at a proof-of-concept level, improvements are needed to enable wider acceptance of such systems; ease of use for general biological researchers, and a mathematical framework to design and interpret the MOC systems. Here, we introduce a pumpless, user-friendly MOC which can be easily assembled and operated, and demonstrate the use of a PK-PD model for interpreting drug's action inside the MOC. The metabolism-dependent anticancer activity of a flavonoid, luteolin, was evaluated in a two-compartment MOC containing the liver (HepG2) and the tumor (HeLa) cells, and the observed anticancer activity was significantly weaker than that anticipated from a well plate study. Simulation of a PK-PD model revealed that simultaneous metabolism and tumor-killing actions likely resulted in a decreased anti-cancer effect. Our work demonstrates that the combined platform of mathematical PK-PD model and an experimental MOC can be a useful tool for gaining an insight into the mechanism of action of drugs with interactions between multiple organs. Biotechnol. Bioeng. 2017;114: 432-443. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Hyuna Lee
- Department of Chemical Engineering, Hongik University, Seoul, Republic of Korea
| | - Dae Shik Kim
- School of Chemical and Biological Engineering, Seoul National University, Seoul, Republic of Korea
| | - Sang Keun Ha
- Korea Food Research Institute, Seongnam-si, Gyenggi-do, Republic of Korea
| | - Inwook Choi
- Korea Food Research Institute, Seongnam-si, Gyenggi-do, Republic of Korea
| | - Jong Min Lee
- School of Chemical and Biological Engineering, Seoul National University, Seoul, Republic of Korea
| | - Jong Hwan Sung
- Department of Chemical Engineering, Hongik University, Seoul, Republic of Korea
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32
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Sawmiller D, Habib A, Li S, Darlington D, Hou H, Tian J, Shytle RD, Smith A, Giunta B, Mori T, Tan J. Diosmin reduces cerebral Aβ levels, tau hyperphosphorylation, neuroinflammation, and cognitive impairment in the 3xTg-AD mice. J Neuroimmunol 2016; 299:98-106. [PMID: 27725131 DOI: 10.1016/j.jneuroim.2016.08.018] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 08/29/2016] [Accepted: 08/31/2016] [Indexed: 02/08/2023]
Abstract
Naturally-occurring bioactive flavonoids such as diosmin significantly reduces amyloid beta (Aβ) associated pathology in Alzheimer's disease (AD) mouse models. In the present study, oral administration of diosmin reduced cerebral Aβ oligomer levels, tau-hyperphosphorylation and cognitive impairment in the 3xTg-AD mouse model through glycogen synthase kinase-3 (GSK-3) and transient receptor potential canonical 6-related mechanisms. Diosmetin, one major bioactive metabolite of diosmin, increased inhibitory GSK-3β phosphorylation, while selectively reducing γ-secretase activity, Aβ generation, tau hyperphosphorylation and pro-inflammatory activation of microglia in vitro, without altering Notch processing. Therefore, both diosmin and diosmetin could be considered as potential candidates for novel anti-AD therapy.
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Affiliation(s)
- Darrell Sawmiller
- Department of Psychiatry, Morsani College of Medicine, University of South Florida, Tampa, FL, United States; James A. Haley Veteran's Administration Hospital, Tampa, FL, United States.
| | - Ahsan Habib
- Department of Psychiatry, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - Song Li
- Department of Psychiatry, Morsani College of Medicine, University of South Florida, Tampa, FL, United States; Center for Translational Research on Neurological Diseases, The First Affiliated Hospital, Dalian Medical University, Dalian, China
| | - Donna Darlington
- Department of Psychiatry, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - Huayan Hou
- Department of Psychiatry, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - Jun Tian
- Department of Psychiatry, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - R Douglas Shytle
- Center for Aging & Brain Repair, Department of Neurosurgery & Brain Repair, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - Adam Smith
- Center for Aging & Brain Repair, Department of Neurosurgery & Brain Repair, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - Brian Giunta
- Neuroimmunology Laboratory, Department of Psychiatry, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - Takashi Mori
- Departments of Biomedical Sciences and Pathology, Saitama Medical Center and Saitama Medical University, Kawagoe, Saitama, Japan
| | - Jun Tan
- Department of Psychiatry, Morsani College of Medicine, University of South Florida, Tampa, FL, United States; James A. Haley Veteran's Administration Hospital, Tampa, FL, United States.
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Lin LC, Pai YF, Tsai TH. Isolation of Luteolin and Luteolin-7-O-glucoside from Dendranthema morifolium Ramat Tzvel and Their Pharmacokinetics in Rats. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:7700-6. [PMID: 25625345 DOI: 10.1021/jf505848z] [Citation(s) in RCA: 131] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Luteolin and luteolin-7-O-glucoside were isolated from the ethanolic extract of Dendranthema morifolium Ramat Tzvel. The structures of these analytes were identified by nuclear magnetic resonance ((1)H and (13)C NMR) and mass spectrometry. Ethanolic and water extracts contained luteolin-7-O-glucoside at 4.19 and 6.56%, respectively. However, the level of luteolin was only 0.19% in the ethanolic extract, and luteolin was not detected in the water extract. To examine the pharmacokinetics and bioavailability of luteolin and luteolin-7-O-glucoside in rats, parallel studies of luteolin (10 mg/kg, iv; and 100 mg/kg, po) and luteolin-7-O-glucoside (10 mg/kg, iv; and 1 g/kg, po) were conducted. The analytes were detected by high-performance liquid chromatography coupled with a photodiode array detector. A phenyl-hexyl (150 × 4.6 mm iv; 5.0 μm) column was used to separate the analytes from the biological samples. The pharmacokinetic data demonstrate that the areas under the concentration curves (AUCs) of luteolin were 261 ± 33 and 611 ± 89 (min μg/mL) after luteolin administration (10 mg/kg, iv; and 100 mg/kg, po, respectively). The oral bioavailability of luteolin was 26 ± 6%. The AUCs of luteolin-7-O-glucoside were 229 ± 15 and 2109 ± 350 (min μg/mL) after administration of luteolin-7-O-glucoside (10 mg/kg, iv; and 1 g/kg, po, respectively). The oral bioavailability of luteolin-7-O-glucoside was approximately 10 ± 2%. In the group that received luteolin-7-O-glucoside orally, a biotransformed luteolin product was detected, but this product was not detected in the group that received luteolin-7-O-glucoside intravenously. The biotransformation ratio of luteolin to luteolin-7-O-glucoside (the AUC ratio of metabolite/parent compound) was approximately 48.78 ± 0.12%. These results demonstrate that luteolin-7-O-glucoside is primarily hydrolyzed to luteolin in the gastrointestinal tract and then absorbed into the systemic circulation.
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Affiliation(s)
- Lie-Chwen Lin
- Institute of Traditional Medicine, National Yang-Ming University , Taipei 112, Taiwan
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 112, Taiwan
| | - Yu-Feng Pai
- Institute of Traditional Medicine, National Yang-Ming University , Taipei 112, Taiwan
| | - Tung-Hu Tsai
- Institute of Traditional Medicine, National Yang-Ming University , Taipei 112, Taiwan
- Graduate Institute of Acupuncture Science, China Medical University , Taichung 404, Taiwan
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University , Kaohsiung 807, Taiwan
- Department of Education and Research, Taipei City Hospital , Taipei 145, Taiwan
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Shi P, Lin X, Yao H. Metabolism and plasma pharmacokinetics of isoorientin, a natural active ingredient, in Sprague-Dawley male rats after oral and intravenous administration. Xenobiotica 2015; 45:999-1008. [PMID: 26084374 DOI: 10.3109/00498254.2015.1028513] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
1. Several pharmacological effects have been revealed on isoorientin, suggesting its potential medicinal prospects. The metabolic and plasma pharmacokinetic profiles of isoorientin were investigated in rats. 2. For intra-gastric gavage, parent drug and three metabolites were detected in urine and feces by HPLC-MS/MS, but only one metabolite was found in plasma and identified as isoorientin 3'- or 4'-O-sulfate (M1) according to MS and UV absorbance spectra. 3. After a single i.v. administration of isoorientin (5, 10, or 15 mg/kg B.W.) in rats, linear pharmacokinetic property was observed with favorable terminal half-lives (1.67 ± 1.32-2.07 ± 0.50 h). After a single p.o. administration of isoorientin (150 mg/kg B.W.) in rats, plasma isoorientin concentration was low, but the concentration of M1 was comparatively high. Low systemic exposure of oral isoorientin in rats could result from its low aqueous solubility and extensive first-pass metabolism, and plasma concentration of M1 can be used as a biomarker of isoorientin intake. Isoorientin showed low oral bioavailability (8.98 ± 1.07%), and had about 6% or 45% dose recovery in urine or feces, respectively, 72 h after intra-gastric gavage. 4. These studies are the first to describe the pharmacokinetics of isoorientin via i.v. or p.o. dosing, providing important information for understanding its process in vivo.
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Affiliation(s)
- Peiying Shi
- a Department of Traditional Chinese Medicine Resource and Bee Product , Bee Science College, Fujian Agriculture and Forestry University , Fuzhou , China and
| | - Xinhua Lin
- b Faculty of Pharmacy, Department of Pharmaceutical Analysis , Fujian Medical University , Fuzhou , China
| | - Hong Yao
- b Faculty of Pharmacy, Department of Pharmaceutical Analysis , Fujian Medical University , Fuzhou , China
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Barrajón-Catalán E, Taamalli A, Quirantes-Piné R, Roldan-Segura C, Arráez-Román D, Segura-Carretero A, Micol V, Zarrouk M. Differential metabolomic analysis of the potential antiproliferative mechanism of olive leaf extract on the JIMT-1 breast cancer cell line. J Pharm Biomed Anal 2014; 105:156-162. [PMID: 25560707 DOI: 10.1016/j.jpba.2014.11.048] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 11/24/2014] [Accepted: 11/27/2014] [Indexed: 10/24/2022]
Abstract
A new differential metabolomic approach has been developed to identify the phenolic cellular metabolites derived from breast cancer cells treated with a supercritical fluid extracted (SFE) olive leaf extract. The SFE extract was previously shown to have significant antiproliferative activity relative to several other olive leaf extracts examined in the same model. Upon SFE extract incubation of JIMT-1 human breast cancer cells, major metabolites were identified by using HPLC coupled to electrospray ionization quadrupole-time-of-flight mass spectrometry (ESI-Q-TOF-MS). After treatment, diosmetin was the most abundant intracellular metabolite, and it was accompanied by minor quantities of apigenin and luteolin. To identify the putative antiproliferative mechanism, the major metabolites and the complete extract were assayed for cell cycle, MAPK and PI3K proliferation pathways modulation. Incubation with only luteolin showed a significant effect in cell survival. Luteolin induced apoptosis, whereas the whole olive leaf extract incubation led to a significant cell cycle arrest at the G1 phase. The antiproliferative activity of both pure luteolin and olive leaf extract was mediated by the inactivation of the MAPK-proliferation pathway at the extracellular signal-related kinase (ERK1/2). However, the flavone concentration of the olive leaf extract did not fully explain the strong antiproliferative activity of the extract. Therefore, the effects of other compounds in the extract, probably at the membrane level, must be considered. The potential synergistic effects of the extract also deserve further attention. Our differential metabolomics approach identified the putative intracellular metabolites from a botanical extract that have antiproliferative effects, and this metabolomics approach can be expanded to other herbal extracts or pharmacological complex mixtures.
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Affiliation(s)
- Enrique Barrajón-Catalán
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández, Avda. Universidad s/n, 03202 Elche, Spain
| | - Amani Taamalli
- Laboratoire de Biotechnologie de l'Olivier, Centre de Biotechnologie de Borj Cedria, BP 901, 2050 Hammam-Lif, Tunisia
| | - Rosa Quirantes-Piné
- Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Granada 18071, Spain; Research and Development of Functional Food Centre (CIDAF), Health Science Technological Park, Avda. del Conocimiento s/n, 18100 Granada, Spain
| | - Cristina Roldan-Segura
- Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Granada 18071, Spain; Research and Development of Functional Food Centre (CIDAF), Health Science Technological Park, Avda. del Conocimiento s/n, 18100 Granada, Spain
| | - David Arráez-Román
- Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Granada 18071, Spain; Research and Development of Functional Food Centre (CIDAF), Health Science Technological Park, Avda. del Conocimiento s/n, 18100 Granada, Spain
| | - Antonio Segura-Carretero
- Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Granada 18071, Spain; Research and Development of Functional Food Centre (CIDAF), Health Science Technological Park, Avda. del Conocimiento s/n, 18100 Granada, Spain
| | - Vicente Micol
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández, Avda. Universidad s/n, 03202 Elche, Spain.
| | - Mokhtar Zarrouk
- Laboratoire de Biotechnologie de l'Olivier, Centre de Biotechnologie de Borj Cedria, BP 901, 2050 Hammam-Lif, Tunisia
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Sanchez-Bridge B, Lévèques A, Li H, Bertschy E, Patin A, Actis-Goretta L. Modulation of (–)-Epicatechin Metabolism by Coadministration with Other Polyphenols in Caco-2 Cell Model. Drug Metab Dispos 2014; 43:9-16. [DOI: 10.1124/dmd.114.060590] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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Amrutha K, Nanjan P, Shaji SK, Sunilkumar D, Subhalakshmi K, Rajakrishna L, Banerji A. Discovery of lesser known flavones as inhibitors of NF-κB signaling in MDA-MB-231 breast cancer cells--A SAR study. Bioorg Med Chem Lett 2014; 24:4735-4742. [PMID: 25190466 DOI: 10.1016/j.bmcl.2014.07.093] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 06/18/2014] [Accepted: 07/31/2014] [Indexed: 12/22/2022]
Abstract
Seventeen flavonoids with different substitutions were evaluated for inhibition of nuclear factor-κB (NF-κB) signaling in the invasive breast cancer cell line MDA-MB-231. They were screened using an engineered MDA-MB-231 cell line reporting NF-κB activation. The modulation of expression of two NF-κB regulated genes involved in tumorigenesis, matrix metalloproteinase-9 (MMP-9), and cyclooxygenase-2 (COX-2) were also analyzed in these cells. Among the compounds tested, all except gossypetin and quercetagetin inhibited the activation of NF-κB, and the expression of MMP-9 and COX-2 to different degree. Methylated flavone, chrysoeriol (luteolin-3'-methylether), was found to be the most potent inhibitor of MMP-9 and COX-2 expressions. The effect of chrysoeriol on cell proliferation, cell cycle, apoptosis and metastasis was analyzed by established methods. Chrysoeriol caused cell cycle arrest at G2/M and inhibited migration and invasion of MDA-MB-231 cells. The structure-activity relations amongst the flavonoids as NF-κB signaling inhibitors was studied. The study indicates differences between the actions of various flavonoids on NF-κB activation and on the biological activities of breast cancer cells. Flavones in general, were more active than the corresponding flavonols.
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Affiliation(s)
- K Amrutha
- Amrita School of Biotechnology, Amrita Vishwa Vidyapeetham, Amritapuri Campus, Clappana P.O., Kollam 690 525, Kerala, India
| | - Pandurangan Nanjan
- Amrita School of Biotechnology, Amrita Vishwa Vidyapeetham, Amritapuri Campus, Clappana P.O., Kollam 690 525, Kerala, India
| | - Sanu K Shaji
- Amrita School of Biotechnology, Amrita Vishwa Vidyapeetham, Amritapuri Campus, Clappana P.O., Kollam 690 525, Kerala, India
| | - Damu Sunilkumar
- Amrita School of Biotechnology, Amrita Vishwa Vidyapeetham, Amritapuri Campus, Clappana P.O., Kollam 690 525, Kerala, India
| | - K Subhalakshmi
- Amrita School of Biotechnology, Amrita Vishwa Vidyapeetham, Amritapuri Campus, Clappana P.O., Kollam 690 525, Kerala, India
| | - Lakshmi Rajakrishna
- Anthem Biosciences, No. 49, Canara Bank Road, Bommasandra Industrial Area, Phase 1, Hosur Road, Bangalore 560 099, Karnataka, India
| | - Asoke Banerji
- Amrita School of Biotechnology, Amrita Vishwa Vidyapeetham, Amritapuri Campus, Clappana P.O., Kollam 690 525, Kerala, India
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Ma JY, Zhou X, Fu J, Hu T, Or PMY, Feng R, He CY, Chen WJ, Zhang X, Chen Y, Wang Y, Yeung JHK. Metabolite profiling analysis of FR429, an ellagitannin purified from Polygonum capitatum, in rat and human liver microsomes, cytosol and rat primary hepatocytes in vitro. Chem Biol Interact 2014; 220:33-40. [PMID: 24928742 DOI: 10.1016/j.cbi.2014.06.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 05/22/2014] [Accepted: 06/01/2014] [Indexed: 11/18/2022]
Abstract
FR429, an ellagitannin (a type of polyphenol), is isolated and purified from Polygonum capitatum Buch.-Ham.ex D. Don which is the original herbal medicine of the "Re-Lin-Qing" formula used clinically to treat urinary tract infection in China. FR429 has been investigated for its antitumor potential in tumor-bearing nude mice in vivo, but its in vitro anti-tumor effect in hepatoma cell lines was low. Thus, it was of our interest to investigate its metabolism pathways for supporting its in vivo antitumor potential. The metabolic profiles of FR429 were studied in vitro by liquid chromatography coupled to ion trap time-of-flight mass spectrometry. Total eight metabolites were identified in rat and human liver microsomes, cytosol, and rat primary hepatocytes in vitro. Ellagic acid, a reported anti-angiogenic agent, was one of the main metabolites in these biological matrices. Methylated metabolites catalyzed by catechol-O-methyl transferase (COMT) were observed mainly in the in vitro incubation with rat liver cytosol, which was verified by using a COMT specific inhibitor entacapone and supported by molecular docking analysis. Methylated and sulfated metabolites were also found in rat primary hepatocytes in a time-dependent manner. In conclusion, the in vitro metabolism pathways of FR429 were hydrolysis, methylation and sulfation. The anti-tumor effects of its major metabolites should be further studied.
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Affiliation(s)
- Jing-Yi Ma
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing 100050, China
| | - Xuelin Zhou
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
| | - Jie Fu
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing 100050, China
| | - Tao Hu
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
| | - Penelope M Y Or
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
| | - Ru Feng
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing 100050, China
| | - Chi-Yu He
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing 100050, China
| | - Wen-Jing Chen
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing 100050, China
| | - Xianfeng Zhang
- Department of Neurosurgery, First Hospital, Jilin University, Changchun 130021, China.
| | - Yangchao Chen
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China.
| | - Yan Wang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing 100050, China.
| | - John H K Yeung
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
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Setoguchi Y, Oritani Y, Ito R, Inagaki H, Maruki-Uchida H, Ichiyanagi T, Ito T. Absorption and metabolism of piceatannol in rats. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:2541-2548. [PMID: 24625210 DOI: 10.1021/jf404694y] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Piceatannol (trans-3,3',4,5'-tetrahydroxystilbene), a natural analogue of resveratrol, has multiple biological functions. Nevertheless, piceatannol's biological fate is yet to be determined. In this study, we evaluated the absorption and metabolism of piceatannol in rats. Furthermore, the area under the plasma concentration curves (AUC) and metabolic pathway of piceatannol were compared with those of resveratrol. We determined the plasma concentrations of piceatannol, resveratrol, and their respective metabolites following their intragastric administration. Resveratrol metabolites were only conjugates, whereas piceatannol metabolites were piceatannol conjugates, O-methyl piceatannol, and its conjugates. The AUC for piceatannol, resveratrol, and their metabolites increased in a dose-dependent manner (90-360 μmol/kg). The AUC for total piceatannol was less than that for total resveratrol, whereas the AUC for piceatannol (8.6 μmol·h/L) after piceatannol and resveratrol coadministration was 2.1 times greater than that for resveratrol (4.1 μmol·h/L). The greater AUC for piceatannol was a result of its higher metabolic stability.
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Affiliation(s)
- Yuko Setoguchi
- Research Institute, Morinaga & CO., Ltd. , 2-1-16 Sachiura, Kanazawa-ku, Yokohama 236-0003, Japan
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Zheng S, Ma Z, Han H, Ye J, Wang R, Cai S, Zhou H, Yu L, Zeng S, Jiang H. Post-column mobile phase adjustment: a strategy to eliminate the contradiction between liquid chromatography and mass spectrometry in the determination of flavonoids in rat plasma. J Pharm Biomed Anal 2014; 95:176-83. [PMID: 24675072 DOI: 10.1016/j.jpba.2014.02.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2013] [Revised: 02/24/2014] [Accepted: 02/28/2014] [Indexed: 01/11/2023]
Abstract
Flavonoids are a group of important naturally occurring polyphenolic compounds with a wide range of biological effects. In this study, a sensitive liquid chromatography tandem mass spectrometry method was developed to simultaneously determine multiple active flavonoids, including quercetin (Que), kaempferol (Kae), apigenin (Api), isorhamnetin (Iso), luteolin (Lut), and naringenin (Nar), in rat plasma. To achieve a satisfied peak shape and LC separation, formic acid with the concentration between 0.05 and 0.2%, or in some case 5%, was generally used to acidify the LC mobile phase in reported studies. Here we found that even 0.05% formic acid could lead to strong mass signal suppression, and the absence of formic acid could reverse the signal suppression but cause serious peak tailing. There is an irreconcilable contradiction between liquid chromatography (LC) and mass spectrometry (MS). In order to simultaneously satisfy LC and MS, LC mobile phase with 0.00075% formic acid and post column mobile phase adjustment with 0.0677% ammonium solution in isopropanol were applied. Compared with the conventional method with mobile phase containing 0.05% formic acid, the mass signal response of Que, Kae, Api, Iso, Lut, Nar, and Oka increased 26.2, 18.6, 13.6, 23.5, 17.5, 15.6 and 15.4 fold, respectively. In addition, the post column mobile phase addition exhibited the better peak shape for the reduction of analytes longitudinal diffusion. The method has been fully validated according to FDA guidelines within the linear range between 0.328 ng mL⁻¹ and 168 ng mL⁻¹, and successfully applied to a pilot pharmacokinetic study of rats after administering 5.43 g kg⁻¹ Pollen of Brassica campestris.
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Affiliation(s)
- Shirui Zheng
- Laboratory of Pharmaceutical Analysis and Drug Metabolism, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Science, Zhejiang University, Hangzhou 310058, China
| | - Zhiyuan Ma
- Laboratory of Pharmaceutical Analysis and Drug Metabolism, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Science, Zhejiang University, Hangzhou 310058, China
| | - Haixia Han
- Laboratory of Pharmaceutical Analysis and Drug Metabolism, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Science, Zhejiang University, Hangzhou 310058, China
| | - Jianfeng Ye
- Department of Research and Development, Conba Pharmaceutical Co., Ltd., Hangzhou 310050, China
| | - Ruwei Wang
- Department of Research and Development, Conba Pharmaceutical Co., Ltd., Hangzhou 310050, China
| | - Sheng Cai
- Laboratory of Pharmaceutical Analysis and Drug Metabolism, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Science, Zhejiang University, Hangzhou 310058, China
| | - Hui Zhou
- Laboratory of Pharmaceutical Analysis and Drug Metabolism, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Science, Zhejiang University, Hangzhou 310058, China
| | - Lushan Yu
- Laboratory of Pharmaceutical Analysis and Drug Metabolism, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Science, Zhejiang University, Hangzhou 310058, China
| | - Su Zeng
- Laboratory of Pharmaceutical Analysis and Drug Metabolism, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Science, Zhejiang University, Hangzhou 310058, China
| | - Huidi Jiang
- Laboratory of Pharmaceutical Analysis and Drug Metabolism, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Science, Zhejiang University, Hangzhou 310058, China.
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Bioavailability of lemon verbena (Aloysia triphylla) polyphenols in rats: impact of colonic inflammation. Br J Nutr 2014; 111:1773-81. [PMID: 24513110 DOI: 10.1017/s0007114514000026] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Lemon verbena (Aloysia triphylla) infusion, a widely consumed herbal tea, contains significant amounts of polyphenols such as flavone diglucuronides and phenylpropanoid glycosides (mainly verbascoside). We have recently shown that lemon verbena infusion offers beneficial effects against dextran sodium sulphate (DSS)-induced colonic inflammation in rats. The present study aimed to evaluate the bioavailability and intestinal absorption of polyphenols derived from lemon verbena infusion in both healthy and colitic rats. For this purpose, lemon verbena infusion was given to rats ad libitum for 14 d, and then 4 % DSS was added to the infusion for 7 d. Before and after DSS administration, 24 h urinary excretion of polyphenols was determined. Flavones were excreted in the urine as conjugated aglycones, and their excretion was not significantly altered by colonic inflammation. Only trace amounts of verbascoside were excreted in the urine, but various metabolites (hydroxycinnamic acids) were detected. The urinary excretion of hydroxycinnamic acids, particularly that of caffeic acid, increased after DSS administration (P< 0·05). Only flavone aglycones (luteolin and diosmetin) were excreted in the faeces in small proportions (3·2 % of ingested flavones). Intestinal absorption of lemon verbena polyphenols was examined using an in situ intestinal perfusion model. Intestinal absorption of verbascoside and flavone diglucuronides did not significantly differ between the healthy and colitic rats. Collectively, these results show that intestinal absorption and urinary excretion of lemon verbena flavone diglucuronides were not altered by colonic inflammation, but that urinary excretion of hydroxycinnamic acids derived from verbascoside was affected in a colitic situation.
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Poór M, Veres B, Jakus PB, Antus C, Montskó G, Zrínyi Z, Vladimir-Knežević S, Petrik J, Kőszegi T. Flavonoid diosmetin increases ATP levels in kidney cells and relieves ATP depleting effect of ochratoxin A. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2014; 132:1-9. [PMID: 24556581 DOI: 10.1016/j.jphotobiol.2014.01.016] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 01/17/2014] [Accepted: 01/23/2014] [Indexed: 02/03/2023]
Abstract
Diosmetin (DIOS) is a flavone aglycone commonly occurring in citrus species and olive leaves, in addition it is one of the active ingredients of some medications. Based on both in vitro and in vivo studies several beneficial effects are attributed to DIOS but the biochemical background of its action seems to be complex and it has not been completely explored yet. Previous investigations suggest that most of the flavonoid aglycones have negative effect on ATP synthesis in a dose dependent manner. In our study 17 flavonoids were tested and interestingly DIOS caused a significant elevation of intracellular ATP levels after 6- and 12-h incubation in MDCK kidney cells. In order to understand the mechanism of action, intracellular ATP and protein levels, ATP/ADP ratio, cell viability and ROS levels were determined after DIOS treatment. In addition, impacts of different enzyme inhibitors and effect of DIOS on isolated rat liver mitochondria were also tested. Finally, the influence of DIOS on the ATP depleting effect of the mycotoxin, ochratoxin A was also investigated. Our major conclusions are the followings: DIOS increases intracellular ATP levels both in kidney and in liver cells. Inhibition of glycolysis or citric acid cycle does not decrease the observed effect. DIOS-induced elevation of ATP levels is completely abolished by the inhibition of ATP synthase. DIOS is able to completely reverse the ATP-depleting effect of the mycotoxin, ochratoxin A. Most probably the DIOS-induced impact on ATP system does not originate from the antioxidant property of DIOS. Based on our findings DIOS may be promising agent to positively influence ATP depletion caused by some metabolic poisons.
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Affiliation(s)
- Miklós Poór
- Institute of Laboratory Medicine, University of Pécs, Pécs H-7624, Hungary
| | - Balázs Veres
- Department of Biochemistry and Medical Chemistry, University of Pécs, Pécs H-7624, Hungary
| | - Péter B Jakus
- Department of Biochemistry and Medical Chemistry, University of Pécs, Pécs H-7624, Hungary
| | - Csenge Antus
- Department of Biochemistry and Medical Chemistry, University of Pécs, Pécs H-7624, Hungary
| | - Gergely Montskó
- Institute of Laboratory Medicine, University of Pécs, Pécs H-7624, Hungary
| | - Zita Zrínyi
- Institute of Laboratory Medicine, University of Pécs, Pécs H-7624, Hungary
| | - Sanda Vladimir-Knežević
- Department of Pharmacognosy, Faculty of Pharmacy and Biochemistry, University of Zagreb, HR-10000 Zagreb, Croatia
| | - József Petrik
- Department of Medical Biochemistry and Haematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, HR-10000 Zagreb, Croatia
| | - Tamás Kőszegi
- Institute of Laboratory Medicine, University of Pécs, Pécs H-7624, Hungary.
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Cao Y, Chen ZJ, Jiang HD, Chen JZ. Computational Studies of the Regioselectivities of COMT-Catalyzed Meta-/Para-O Methylations of Luteolin and Quercetin. J Phys Chem B 2014; 118:470-81. [DOI: 10.1021/jp410296s] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yang Cao
- Institute
of Materia Medica,
College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, P. R. China
| | - Zhong-Jian Chen
- Institute
of Materia Medica,
College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, P. R. China
| | - Hui-Di Jiang
- Institute
of Materia Medica,
College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, P. R. China
| | - Jian-Zhong Chen
- Institute
of Materia Medica,
College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, P. R. China
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Lou Y, Zheng J, Wang B, Zhang X, Zhang X, Zeng S. Metabolites characterization of chamaechromone in vivo and in vitro by using ultra-performance liquid chromatography/Xevo G2 quadrupole time-of-flight tandem mass spectrometry. JOURNAL OF ETHNOPHARMACOLOGY 2013; 151:242-252. [PMID: 24189033 DOI: 10.1016/j.jep.2013.10.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 10/08/2013] [Accepted: 10/13/2013] [Indexed: 06/02/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Stellera chamaejasme L. (Thymelaeaceae) was a toxic perennial herb and widely used as pesticide and dermatological agents in China. Chamaechromone was a major component in the dried roots of Stellera chamaejasme with anti-HBV and insecticidal activity. Analysis of metabolic profile in vivo and in vitro plays a pivotal role to unravel how TCM works. And the metabolites of chamaechromone might influence the effects and toxicity of Stellera chamaejasme. Moreover, the metabolic routes of chamaechromone provide an important basis for toxicological safety evaluation. Until now, little is known about the metabolism of chamaechromone. The current study was designed to characterize the whole metabolic pathways of chamaechromone in vitro and in vivo. MATERIALS AND METHODS Twenty-four rats were randomly divided into four groups, including two oral administration groups (100mgkg(-1)), one intravenous injection group (5 mgkg(-1)), and one control group. The metabolites in rat urine and feces and bile were identified by UPLC/Q-TOF MS analysis and β-glucuronidase hydrolysis. Moreover, the possible metabolic mechanism was further confirmed by Phase I and Phase II metabolism and catechol-O-methyltransferase methylation in rat liver S9 fraction and degradation in rat intestinal bacteria. RESULTS A total of 24 metabolites from chamaechromone were detected and identified in vivo and in vitro, 20 of which were novel. And the major metabolic processes were hydroxylation, methylation, glucuronation, acetylation, dehydroxylation and degradation. CONCLUSIONS The present study revealed the whole metabolic pathways of chamaechromone in rat through both in vitro and in vivo experiments for the first time. And chamaechromone could undergo extensive phase I and phase II metabolism in rat. These findings would provide an important basis for the further study and clinical application of chamaechromone. In addition, the results of this work have showed the feasibility of the UPLC/Q-TOF-MS approach for rapid and reliable characterization of metabolites.
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Affiliation(s)
- Yan Lou
- Laboratory of Pharmaceutical Analysis and Drug Metabolism, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University; The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 QingChun Road, Hangzhou, Zhejiang 310000, People's Republic of China
| | - Jinqi Zheng
- Zhejiang Institute for Food and Drug Control, Hangzhou 310004, People's Republic of China
| | - Baohong Wang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 QingChun Road, Hangzhou, Zhejiang 310000, People's Republic of China
| | - Xingguo Zhang
- The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 QingChun Road, Hangzhou, Zhejiang 310000, People's Republic of China
| | - Xia Zhang
- Laboratory of Pharmaceutical Analysis and Drug Metabolism, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University
| | - Su Zeng
- Laboratory of Pharmaceutical Analysis and Drug Metabolism, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University.
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Chen ZJ, Dai YQ, Kong SS, Song FF, Li LP, Ye JF, Wang RW, Zeng S, Zhou H, Jiang HD. Luteolin is a rare substrate of human catechol-O-methyltransferase favoring a para-methylation. Mol Nutr Food Res 2013; 57:877-85. [PMID: 23386290 DOI: 10.1002/mnfr.201200584] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Revised: 12/02/2012] [Accepted: 12/13/2012] [Indexed: 12/11/2022]
Abstract
SCOPE The study aimed to investigate the regioselectivity of methylation of luteolin (3',4',5,7-tetrahydroxyflavone) in human in vitro and in vivo. METHODS AND RESULTS Recombinant human catechol-O-methyltransferase (COMT) and human liver S9 were utilized to study the kinetics of meta (3')- and para (4')- methylation of luteolin, and urine samples from volunteers after giving a luteolin-containing formulation were collected to determine the ratio of para-/meta-production. The results showed luteolin favored a para-methylation, with a ratio of of para-/meta-production in CLint (1.43 in recombinant human COMT and 1.47 in human liver S9), which was contrary to the known substrates of COMT. However, the result of urine sample assay showed a preference of meta-methylation with a ratio of of para-/meta-production (0.460 ± 0.126). To elucidate the mechanism for different preference of methylation of luteolin in vitro and in vivo, metabolism stability of the meta- and para-methylated luteolin was evaluated in human liver microsomes and recombinant human CYP450s, which revealed that para-methylated luteolin was more easily demethylated by human CYP1A2 and CYP3A4/5 than meta-methylated luteolin. CONCLUSION Luteolin was a rare substrate of human COMT favoring a para-methylation, but further demethylation by human CYP1A2 and CYP3A4/5 caused a preference of accumulation in meta-methylated luteolin in vivo.
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Affiliation(s)
- Zhong-Jian Chen
- Department of Pharmaceutical Analysis and Drug Metabolism, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, PR China
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Chen Z, Kong S, Song F, Li L, Jiang H. Pharmacokinetic study of luteolin, apigenin, chrysoeriol and diosmetin after oral administration of Flos Chrysanthemi extract in rats. Fitoterapia 2012; 83:1616-22. [PMID: 22999990 PMCID: PMC7127355 DOI: 10.1016/j.fitote.2012.09.011] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 09/11/2012] [Accepted: 09/12/2012] [Indexed: 01/21/2023]
Abstract
Flos Chrysanthemi (the flower of Chrysanthemum morifolium Ramat.) is widely used in China as a food and traditional Chinese medicine for many diseases. Luteolin and apigenin are two main bioactive components in Flos Chrysanthemi, and chrysoeriol and diosmetin are two methylated metabolites of luteolin in vivo by cathechol-O-methyltransferase (COMT). However, there was lack of pharmacokinetic information of chrysoeriol and diosmetin after oral administration of Flos Chrysanthemi extract (FCE). The present study aimed to develop an HPLC-UV method for simultaneous determination of rat plasma concentration of luteolin, apigenin, chrysoeriol and diosmetin and utilize it in pharmacokinetic study of the four compounds after orally giving FCE to rats. The method was successfully validated and applied to the pharmacokinetic study when oral administration of FCE to rats with or without co-giving a COMT inhibitor, entacapone. Chrysoeriol and diosmetin were detected in rat plasma after oral administration of FCE and their concentrations were significantly decreased after co-giving entacapone. Furthermore, AUC of luteolin was significantly increased by entacapone, while that of chrysoeriol was decreased by entacapone, which revealed COMT might play an important role in the disposition of luteolin in rats after dosing of FCE. In conclusion, a sensitive, accurate and reproducible HPLC-UV method for simultaneous determination of luteolin, apigenin, chrysoeriol and diosmetin in rat plasma were developed, pharmacokinetics of chrysoeriol and diosmetin combined with luteolin and apigenin were characterized after oral administration of FCE to rats, which gave us more information on pharmacokinetics and potential pharmacological effects of FCE in vivo.
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Affiliation(s)
- Zhongjian Chen
- Department of Pharmaceutical Analysis and Drug Metabolism, College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
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Xie C, Zhong D, Chen X. Identification of the ortho-benzoquinone intermediate of 5-O-caffeoylquinic acid in vitro and in vivo: comparison of bioactivation under normal and pathological situations. Drug Metab Dispos 2012; 40:1628-40. [PMID: 22551521 DOI: 10.1124/dmd.112.045641] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
5-O-Caffeoylquinic acid (5-CQA) is one of the major bioactive ingredients in some Chinese herbal injections. Occasional anaphylaxis has been reported for these injections during their clinical use, possibly caused by reactive metabolites of 5-CQA. This study aimed at characterizing the bioactivation pathway(s) of 5-CQA and the metabolic enzyme(s) involved. After incubating 5-CQA with GSH and NADPH-supplemented human liver microsomes, two types of GSH conjugates were characterized: one was M1-1 from the 1,4-addition of GSH to ortho-benzoquinone intermediate; the other was M2-1 and M2-2 from the 1,4-addition of GSH directly to the α,β-unsaturated carbonyl group of the parent. The formation of M1-1 was cytochrome P450 (P450)-mediated, with 3A4 and 2E1 as the principal catalyzing enzymes, whereas the formation of M2-1 and M2-2 was independent of NADPH and could be accelerated by cytosolic glutathione transferase. In the presence of cumene hydroperoxide, M1-1 formation increased 6-fold, indicating that 5-CQA can also be bioactivated by P450 peroxidase under oxidizing conditions. Furthermore, M1-1 could be formed by myeloperoxidase in activated human leukocytes, implying that 5-CQA bioactivation is more likely to occur under inflammatory conditions. This finding was supported by experiments on lipopolysaccharide-induced inflammatory rats, where a greater amount of M1-1 was detected. In S-adenosyl methionine- and GSH-supplemented human S9 incubations, M1-1 formation decreased by 80% but increased after tolcapone-inhibited catechol-O-methyltransferase (COMT) activity. In summary, the high reactivities of the ortho-benzoquinone metabolite and α,β-unsaturated carbonyl group of 5-CQA to nucleophiles have been demonstrated. Different pathological situations and COMT activities in patients may alter the bioactivation extent of 5-CQA.
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Affiliation(s)
- Cen Xie
- Center for Drug Metabolism and Pharmacokinetics, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
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Zhao M, Li LP, Sun DL, Sun SY, Huang SD, Zeng S, Jiang HD. Stereoselective metabolism of tetrahydropalmatine enantiomers in rat liver microsomes. Chirality 2012; 24:368-73. [DOI: 10.1002/chir.22020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Accepted: 01/24/2012] [Indexed: 11/12/2022]
Affiliation(s)
- Ming Zhao
- Department of Pharmaceutical Analysis and Drug Metabolism; College of Pharmaceutical Sciences; Zhejiang University; Hangzhou; People's Republic of China
| | - Li-Ping Li
- Department of Pharmaceutical Analysis and Drug Metabolism; College of Pharmaceutical Sciences; Zhejiang University; Hangzhou; People's Republic of China
| | - Dong-Li Sun
- Department of Pharmaceutical Analysis and Drug Metabolism; College of Pharmaceutical Sciences; Zhejiang University; Hangzhou; People's Republic of China
| | - Si-Yuan Sun
- Department of Pharmaceutical Analysis and Drug Metabolism; College of Pharmaceutical Sciences; Zhejiang University; Hangzhou; People's Republic of China
| | - Shan-Ding Huang
- The Third Affiliated Hospital of Ningbo University; Ningbo; People's Republic of China
| | - Su Zeng
- Department of Pharmaceutical Analysis and Drug Metabolism; College of Pharmaceutical Sciences; Zhejiang University; Hangzhou; People's Republic of China
| | - Hui-Di Jiang
- Department of Pharmaceutical Analysis and Drug Metabolism; College of Pharmaceutical Sciences; Zhejiang University; Hangzhou; People's Republic of China
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Chen Z, Tu M, Sun S, Kong S, Wang Y, Ye J, Li L, Zeng S, Jiang H. The Exposure of Luteolin Is Much Lower than That of Apigenin in Oral Administration of Flos Chrysanthemi Extract to Rats. Drug Metab Pharmacokinet 2012; 27:162-8. [DOI: 10.2133/dmpk.dmpk-11-rg-081] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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