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Mandal MK, Domb AJ. Antimicrobial Activities of Natural Bioactive Polyphenols. Pharmaceutics 2024; 16:718. [PMID: 38931842 PMCID: PMC11206801 DOI: 10.3390/pharmaceutics16060718] [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: 04/05/2024] [Revised: 05/21/2024] [Accepted: 05/24/2024] [Indexed: 06/28/2024] Open
Abstract
Secondary metabolites, polyphenols, are widespread in the entire kingdom of plants. They contain one or more hydroxyl groups that have a variety of biological functions in the natural environment. These uses include polyphenols in food, beauty products, dietary supplements, and medicinal products and have grown rapidly during the past 20 years. Antimicrobial polyphenols are described together with their sources, classes, and subclasses. Polyphenols are found in different sources, such as dark chocolate, olive oil, red wine, almonds, cashews, walnuts, berries, green tea, apples, artichokes, mushrooms, etc. Examples of benefits are antiallergic, antioxidant, anticancer agents, anti-inflammatory, antihypertensive, and antimicrobe properties. From these sources, different classes of polyphenols are helpful for the growth of internal functional systems of the human body, providing healthy fats, vitamins, and minerals, lowering the risk of cardiovascular diseases, improving brain health, and rebooting our cellular microbiome health by mitochondrial uncoupling. Among the various health benefits of polyphenols (curcumin, naringenin, quercetin, catechin, etc.) primarily different antimicrobial activities are discussed along with possible future applications. For polyphenols and antimicrobial agents to be proven safe, adverse health impacts must be substantiated by reliable scientific research as well as in vitro and in vivo clinical data. Future research may be influenced by this evaluation.
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Affiliation(s)
| | - Abraham J. Domb
- The Alex Grass Center for Drug Design & Synthesis and the Center for Cannabis Research, School of Pharmacy, Institute of Drug Research, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 9112001, Israel;
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2
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Pferschy-Wenzig EM, Kunert O, Thumann T, Moissl-Eichinger C, Bauer R. Characterization of metabolites from milk thistle flavonolignans generated by human fecal microbiota. PHYTOCHEMISTRY 2023; 215:113834. [PMID: 37648045 DOI: 10.1016/j.phytochem.2023.113834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 08/18/2023] [Accepted: 08/20/2023] [Indexed: 09/01/2023]
Abstract
Silymarin, a mixture of diastereomeric and regioisomeric flavonolignans from milk thistle (Silybum marianum (L.) Gaertn.) fruits, is known to possess a panel of pharmacological activities. However, due to low water solubility and extensive phase II metabolism, the oral bioavailability of the flavonolignans is limited. Since their interaction with gut microbiome is likely due to their predominantly fecal excretion route, the biotransformation of milk thistle flavonolignans by gut microorganisms was studied. A 1:1 mixture of the two main silymarin flavonolignans silybins A and B was incubated in human fecal suspension from one donor for 24 h under anoxic conditions. Purification of the incubate allowed to isolate and structurally elucidate the two main metabolites as (2R, 3R)-2-{4-[2-(3,4-dihydroxy-phenyl)-(1R)-1-hydroxymethyl-ethoxy]-3-hydroxy-phenyl}-3,5,7-trihydroxy-chroman-4-one (a product of demethylation and dioxane ring cleavage) and demethylsilybin B. Furthermore, silymarin was incubated with human fecal suspension, and its biotransformation was monitored by means of LC-HRMS metabolite profiling. Apart from the two isolated and structurally elucidated metabolites, several types of biotransformation products could be annotated, including demethylation products, reduction/ring cleavage products, products of demethylation plus reduction/ring cleavage, as well as several low molecular weight aromatic metabolites. The potential pharmacological activities of these gut microbial metabolites deserve closer examination in the future.
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Affiliation(s)
- Eva-Maria Pferschy-Wenzig
- University of Graz, Institute of Pharmaceutical Sciences, Beethovenstraße 8, 8010, Graz, Austria; BioTechMed- Graz, Mozartgasse 12/II, 8010, Graz, Austria.
| | - Olaf Kunert
- University of Graz, Institute of Pharmaceutical Sciences, Beethovenstraße 8, 8010, Graz, Austria.
| | - Timo Thumann
- University of Graz, Institute of Pharmaceutical Sciences, Beethovenstraße 8, 8010, Graz, Austria.
| | - Christine Moissl-Eichinger
- Medical University Graz, Diagnostic & Research Institute of Hygiene, Microbiology and Environmental Medicine, Neue Stiftingtalstraße 6 (MC1.B.)/III, 8010, Graz, Austria; BioTechMed- Graz, Mozartgasse 12/II, 8010, Graz, Austria.
| | - Rudolf Bauer
- University of Graz, Institute of Pharmaceutical Sciences, Beethovenstraße 8, 8010, Graz, Austria; BioTechMed- Graz, Mozartgasse 12/II, 8010, Graz, Austria.
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3
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Xue H, Mei C, Wang F, Tang X. Relationship among Chinese herb polysaccharide (CHP), gut microbiota, and chronic diarrhea and impact of CHP on chronic diarrhea. Food Sci Nutr 2023; 11:5837-5855. [PMID: 37823142 PMCID: PMC10563694 DOI: 10.1002/fsn3.3596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 07/13/2023] [Accepted: 07/22/2023] [Indexed: 10/13/2023] Open
Abstract
Chronic diarrhea, including diarrhea-predominant irritable bowel syndrome (IBS-D), osmotic diarrhea, bile acid diarrhea, and antibiotic-associated diarrhea, is a common problem which is highly associated with disorders of the gut microbiota composition such as small intestinal bacterial overgrowth (SIBO) and so on. A growing number of studies have supported the view that Chinese herbal formula alleviates the symptoms of diarrhea by modulating the fecal microbiota. Chinese herbal polysaccharides (CHPs) are natural polymers composed of monosaccharides that are widely found in Chinese herbs and function as important active ingredients. Commensal gut microbiota has an extensive capacity to utilize CHPs and play a vital role in degrading polysaccharides into short-chain fatty acids (SCFAs). Many CHPs, as prebiotics, have an antidiarrheal role to promote the growth of beneficial bacteria and inhibit the colonization of pathogenic bacteria. This review systematically summarizes the relationship among gut microbiota, chronic diarrhea, and CHPs as well as recent progress on the impacts of CHPs on the gut microbiota and recent advances on the possible role of CHPs in chronic diarrhea.
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Affiliation(s)
- Hong Xue
- Digestive Laboratory of Traditional Chinese Medicine Research Institute of Spleen and Stomach DiseasesXiyuan Hospital, China Academy of Chinese Medical SciencesBeijingChina
| | - Chun‐Feng Mei
- Digestive Laboratory of Traditional Chinese Medicine Research Institute of Spleen and Stomach DiseasesXiyuan Hospital, China Academy of Chinese Medical SciencesBeijingChina
| | - Feng‐Yun Wang
- Digestive Laboratory of Traditional Chinese Medicine Research Institute of Spleen and Stomach DiseasesXiyuan Hospital, China Academy of Chinese Medical SciencesBeijingChina
| | - Xu‐Dong Tang
- Digestive Laboratory of Traditional Chinese Medicine Research Institute of Spleen and Stomach DiseasesXiyuan Hospital, China Academy of Chinese Medical SciencesBeijingChina
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Lněničková K, Vrba J, Kosina P, Papoušková B, Mekadim C, Mrázek J, Sova M, Sovová E, Valentová K, Křen V, Kouřilová P, Vrbková J, Ulrichová J. Metabolic profiling of silymarin constituents in urine and feces of healthy volunteers: A 90-day study. J Funct Foods 2023. [DOI: 10.1016/j.jff.2022.105391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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5
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Zhao Y, Zhong X, Yan J, Sun C, Zhao X, Wang X. Potential roles of gut microbes in biotransformation of natural products: An overview. Front Microbiol 2022; 13:956378. [PMID: 36246222 PMCID: PMC9560768 DOI: 10.3389/fmicb.2022.956378] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 08/29/2022] [Indexed: 11/23/2022] Open
Abstract
Natural products have been extensively applied in clinical practice, characterized by multi-component and multi-target, many pharmacodynamic substances, complex action mechanisms, and various physiological activities. For the oral administration of natural products, the gut microbiota and clinical efficacy are closely related, but this relationship remains unclear. Gut microbes play an important role in the transformation and utilization of natural products caused by the diversity of enzyme systems. Effective components such as flavonoids, alkaloids, lignans, and phenols cannot be metabolized directly through human digestive enzymes but can be transformed by enzymes produced by gut microorganisms and then utilized. Therefore, the focus is paid to the metabolism of natural products through the gut microbiota. In the present study, we systematically reviewed the studies about gut microbiota and their effect on the biotransformation of various components of natural products and highlighted the involved common bacteria, reaction types, pharmacological actions, and research methods. This study aims to provide theoretical support for the clinical application in the prevention and treatment of diseases and provide new ideas for studying natural products based on gut biotransformation.
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Affiliation(s)
- Yucui Zhao
- Ministry of Education Key Laboratory of Pharmacology of Traditional Chinese Medical Formulae, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Xinqin Zhong
- Ministry of Education Key Laboratory of Pharmacology of Traditional Chinese Medical Formulae, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Junyuan Yan
- Ministry of Education Key Laboratory of Pharmacology of Traditional Chinese Medical Formulae, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Congying Sun
- Ministry of Education Key Laboratory of Pharmacology of Traditional Chinese Medical Formulae, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Xin Zhao
- Ministry of Education Key Laboratory of Pharmacology of Traditional Chinese Medical Formulae, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- *Correspondence: Xin Zhao,
| | - Xiaoying Wang
- Ministry of Education Key Laboratory of Pharmacology of Traditional Chinese Medical Formulae, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- Xiaoying Wang,
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Ying HZ, Xie W, Wang MC, He JQ, Zhang HH, Yu CH. Gut microbiota: An emerging therapeutic approach of herbal medicine for prevention of colorectal cancer. Front Cell Infect Microbiol 2022; 12:969526. [PMID: 36051242 PMCID: PMC9426771 DOI: 10.3389/fcimb.2022.969526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 08/01/2022] [Indexed: 12/24/2022] Open
Abstract
The gut dysbiosis has emerged as a prominent player in the pathogenesis and development of colorectal cancer (CRC), which in turn intensifies dysregulated gut microbiota composition and inflammation. Since most drugs are given orally, this dysbiosis directly and indirectly impinges the absorption and metabolism of drugs in the gastrointestinal tract, and subsequently affects the clinical outcome of patients with CRC. Herbal medicine, including the natural bioactive products, have been used traditionally for centuries and can be considered as novel medicinal sources for anticancer drug discovery. Due to their various structures and pharmacological effects, natural products have been found to improve microbiota composition, repair intestinal barrier and reduce inflammation in human and animal models of CRC. This review summarizes the chemo-preventive effects of extracts and/or compounds derived from natural herbs as the promising antineoplastic agents against CRC, and will provide innovative strategies to counteract dysregulated microbiota and improve the lives of CRC patients.
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Affiliation(s)
- Hua-Zhong Ying
- Key Laboratory of Experimental Animal and Safety Evaluation, Zhejiang Academy of Medical Sciences (Hangzhou Medical College), Hangzhou, China
| | - Wei Xie
- Key Laboratory of Experimental Animal and Safety Evaluation, Zhejiang Academy of Medical Sciences (Hangzhou Medical College), Hangzhou, China
| | - Meng-Chuan Wang
- Key Laboratory of Experimental Animal and Safety Evaluation, Zhejiang Academy of Medical Sciences (Hangzhou Medical College), Hangzhou, China
| | - Jia-Qi He
- The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - Huan-Huan Zhang
- Key Laboratory of Experimental Animal and Safety Evaluation, Zhejiang Academy of Medical Sciences (Hangzhou Medical College), Hangzhou, China
| | - Chen-Huan Yu
- Key Laboratory of Experimental Animal and Safety Evaluation, Zhejiang Academy of Medical Sciences (Hangzhou Medical College), Hangzhou, China
- Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, China
- Institute of Cancer and Basic Medicine, Chinese Academy of Sciences, Hangzhou, China
- *Correspondence: Chen-Huan Yu,
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Křen V. Chirality Matters: Biological Activity of Optically Pure Silybin and Its Congeners. Int J Mol Sci 2021; 22:ijms22157885. [PMID: 34360650 PMCID: PMC8346157 DOI: 10.3390/ijms22157885] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 07/19/2021] [Indexed: 12/31/2022] Open
Abstract
This review focuses on the specific biological effects of optically pure silymarin flavo-nolignans, mainly silybins A and B, isosilybins A and B, silychristins A and B, and their 2,3-dehydro derivatives. The chirality of these flavonolignans is also discussed in terms of their analysis, preparative separation and chemical reactions. We demonstrated the specific activities of the respective diastereomers of flavonolignans and also the enantiomers of their 2,3-dehydro derivatives in the 3D anisotropic systems typically represented by biological systems. In vivo, silymarin flavonolignans do not act as redox antioxidants, but they play a role as specific ligands of biological targets, according to the "lock-and-key" concept. Estrogenic, antidiabetic, anticancer, antiviral, and antiparasitic effects have been demonstrated in optically pure flavonolignans. Potential application of pure flavonolignans has also been shown in cardiovascular and neurological diseases. Inhibition of drug-metabolizing enzymes and modulation of multidrug resistance activity by these compounds are discussed in detail. The future of "silymarin applications" lies in the use of optically pure components that can be applied directly or used as valuable lead structures, and in the exploration of their true molecular effects.
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Affiliation(s)
- Vladimír Křen
- Laboratory of Biotransformation, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic
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Zhao ZW, Chang HC, Ching H, Lien JC, Huang HC, Wu CR. Antioxidant Effects and Phytochemical Properties of Seven Taiwanese Cirsium Species Extracts. Molecules 2021; 26:molecules26133935. [PMID: 34203213 PMCID: PMC8272034 DOI: 10.3390/molecules26133935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 06/25/2021] [Accepted: 06/25/2021] [Indexed: 11/17/2022] Open
Abstract
In the present investigation, we compared the radical-scavenging activities and phenolic contents of seven Taiwanese Cirsium species with a spectrophotometric method. We further analyzed their phytochemical profiles with high-performance liquid chromatography–photodiode array detection (HPLC–DAD). We found that the flower part of Cirsium japonicum var. australe (CJF) showed the best radical-scavenging activities against 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), and the hypochlorite ion, for which the equivalents were 6.44 ± 0.17 mg catechin/g, 54.85 ± 0.66 mmol Trolox/g and 418.69 ± 10.52 mmol Trolox/g respectively. CJF also had the highest contents of total phenolics (5.23 ± 0.20 mg catechin/g) and phenylpropanoids (29.73 ± 0.72 mg verbascoside/g). According to the Pearson’s correlation coefficient, there was a positive correlation between the total phenylpropanoid content and ABTS radical-scavenging activities (r = 0.979). The radical-scavenging activities of the phenylpropanoids are closely related to their reducing power (r = 0.986). HPLC chromatograms obtained in validated HPLC conditions confirm that they have different phytochemical profiles by which they can be distinguished. Only CJF contained silicristin (0.66 ± 0.03 mg/g) and silydianin (9.13 ± 0.30 mg/g). CJF contained the highest contents of apigenin (5.56 ± 0.09 mg/g) and diosmetin (2.82 ± 0.10 mg/g). Among the major constituents, silicristin had the best radical-scavenging activities against DPPH (71.68 ± 0.66 mg catechin/g) and ABTS (3.01 ± 0.01 mmol Trolox/g). However, diosmetin had the best reducing power and radical-scavenging activity against the hypochlorite anion (41.57 ± 1.14 mg mmol Trolox/g). Finally, we found that flavonolignans (especial silicristin and silydianin) and diosmetin acted synergistically in scavenging radicals.
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Affiliation(s)
- Zi-Wei Zhao
- The Institute of Basic Medical Sciences, National Cheng Kung University, Tainan 701, Taiwan;
| | - Hung-Chi Chang
- Department of Golden-Ager Industry Management, College of Management, Chaoyang University of Technology, Taichung 413, Taiwan;
| | - Hui Ching
- Department of Pharmacy, Taichung Hospital, Ministry of Health and Welfare, Taichung 404, Taiwan;
| | - Jin-Cherng Lien
- School of Pharmacy, China Medical University, Taichung 404, Taiwan;
| | - Hui-Chi Huang
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, College of Pharmacy, China Medical University, Taichung 404, Taiwan;
| | - Chi-Rei Wu
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, College of Pharmacy, China Medical University, Taichung 404, Taiwan;
- Correspondence: ; Tel.: +886-4-2205-3366 (ext. 5506)
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Vrba J, Papoušková B, Kosina P, Lněničková K, Valentová K, Ulrichová J. Identification of Human Sulfotransferases Active towards Silymarin Flavonolignans and Taxifolin. Metabolites 2020; 10:metabo10080329. [PMID: 32806559 PMCID: PMC7465014 DOI: 10.3390/metabo10080329] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 08/04/2020] [Accepted: 08/10/2020] [Indexed: 12/17/2022] Open
Abstract
Natural phenolic compounds are known to be metabolized by phase II metabolic reactions. In this study, we examined the in vitro sulfation of the main constituents of silymarin, an herbal remedy produced from the fruits of the milk thistle. The study focused on major flavonolignan constituents, including silybin A, silybin B, isosilybin A, isosilybin B, silychristin, and silydianin, as well as the flavonoid taxifolin. Using ultra-high-performance liquid chromatography coupled with tandem mass spectrometry (UHPLC-MS), individual flavonolignans and taxifolin were found to be sulfated by human liver and human intestinal cytosols. Moreover, experiments with recombinant enzymes revealed that human sulfotransferases (SULTs) 1A1*1, 1A1*2, 1A2, 1A3, 1B1, 1C4, and 1E1 catalyzed the sulfation of all of the tested compounds, with the exception of silydianin, which was not sulfated by SULT1B1 and SULT1C4. The sulfation products detected were monosulfates, of which some of the major ones were identified as silybin A 20-O-sulfate, silybin B 20-O-sulfate, and isosilybin A 20-O-sulfate. Further, we also observed the sulfation of the tested compounds when they were tested in the silymarin mixture. Sulfates of flavonolignans and of taxifolin were produced by incubating silymarin with all of the above SULT enzymes, with human liver and intestinal cytosols, and also with human hepatocytes, even though the spectrum and amount of the sulfates varied among the metabolic models. Considering our results and the expression patterns of human sulfotransferases in metabolic tissues, we conclude that flavonolignans and taxifolin can potentially undergo both intestinal and hepatic sulfation, and that SULTs 1A1, 1A3, 1B1, and 1E1 could be involved in the biotransformation of the constituents of silymarin.
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Affiliation(s)
- Jiří Vrba
- Department of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 3, 77515 Olomouc, Czech Republic; (P.K.); (K.L.); (J.U.)
- Correspondence:
| | - Barbora Papoušková
- Regional Centre of Advanced Technologies and Materials, Department of Analytical Chemistry, Faculty of Science, Palacký University, 17. Listopadu 12, 77146 Olomouc, Czech Republic;
| | - Pavel Kosina
- Department of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 3, 77515 Olomouc, Czech Republic; (P.K.); (K.L.); (J.U.)
| | - Kateřina Lněničková
- Department of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 3, 77515 Olomouc, Czech Republic; (P.K.); (K.L.); (J.U.)
| | - Kateřina Valentová
- Laboratory of Biotransformation, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 14220 Prague, Czech Republic;
| | - Jitka Ulrichová
- Department of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 3, 77515 Olomouc, Czech Republic; (P.K.); (K.L.); (J.U.)
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Gong X, Li X, Bo A, Shi RY, Li QY, Lei LJ, Zhang L, Li MH. The interactions between gut microbiota and bioactive ingredients of traditional Chinese medicines: A review. Pharmacol Res 2020; 157:104824. [PMID: 32344049 DOI: 10.1016/j.phrs.2020.104824] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 03/09/2020] [Accepted: 04/06/2020] [Indexed: 02/06/2023]
Abstract
In recent years, the interaction between the bioactive ingredients of traditional Chinese medicine (TCM) and gut microbiota has been a focus of many studies. When TCM enters the digestive tract, some bioactive ingredients are not absorbed into the gut well thus leading to low bioavailability. Ingredients of TCM are metabolised, or biotransformed by gut microbiota, thereby producing new bioactive molecules, and promote medicine absorption into the circulation. At the same time, the ingredients of TCM effect the composition and structure of gut microbiota, thereby influencing the remote function of diseased organs / tissues through the systemic action of the gut microbiota. In this review, we summarise the gut microbiota-mediated metabolism of flavonoids, alkaloids, terpenoids, saponins, polysaccharides, phenylpropanoids, and organic acids, along with a discussion on the metabolites formed and the biotransformation pathways involving various enzymes. We also highlight the importance of bioactive ingredients of TCM in regulating gut microbiota.
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Affiliation(s)
- Xue Gong
- Baotou Medical College, Baotou, Inner Mongolia, China
| | - Xue Li
- Inner Mongolia Medical University, Hohhot, Inner Mongolia, China
| | - Agula Bo
- Baotou Medical College, Baotou, Inner Mongolia, China
| | - Ru-Yu Shi
- Baotou Medical College, Baotou, Inner Mongolia, China
| | - Qin-Yu Li
- Baotou Medical College, Baotou, Inner Mongolia, China
| | - Lu-Jing Lei
- Inner Mongolia Institute of Traditional Chinese Medicine, Hohhot, Inner Mongolia, China
| | - Lei Zhang
- Inner Mongolia Medical University, Hohhot, Inner Mongolia, China
| | - Min-Hui Li
- Baotou Medical College, Baotou, Inner Mongolia, China; Inner Mongolia Medical University, Hohhot, Inner Mongolia, China; Inner Mongolia Institute of Traditional Chinese Medicine, Hohhot, Inner Mongolia, China; Qiqihar Medical University, Qiqihar, Heilongjiang, China; Inner Mongolia Key Laboratory of Characteristic Geoherbs Resources and Utilization, Baotou Medical College, Baotou, Inner Mongolia, China.
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Valentová K, Havlík J, Kosina P, Papoušková B, Jaimes JD, Káňová K, Petrásková L, Ulrichová J, Křen V. Biotransformation of Silymarin Flavonolignans by Human Fecal Microbiota. Metabolites 2020; 10:E29. [PMID: 31936497 PMCID: PMC7023230 DOI: 10.3390/metabo10010029] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Revised: 01/04/2020] [Accepted: 01/07/2020] [Indexed: 12/19/2022] Open
Abstract
Flavonolignans occur typically in Silybum marianum (milk thistle) fruit extract, silymarin, which contains silybin, isosilybin, silychristin, silydianin, and their 2,3-dehydroderivatives, together with other minor flavonoids and a polymeric phenolic fraction. Biotransformation of individual silymarin components by human microbiota was studied ex vivo, using batch incubations inoculated by fecal slurry. Samples at selected time points were analyzed by ultrahigh-performance liquid chromatography equipped with mass spectrometry. The initial experiment using a concentration of 200 mg/L showed that flavonolignans are resistant to the metabolic action of intestinal microbiota. At the lower concentration of 10 mg/L, biotransformation of flavonolignans was much slower than that of taxifolin, which was completely degraded after 16 h. While silybin, isosilybin, and 2,3-dehydrosilybin underwent mostly demethylation, silychristin was predominantly reduced. Silydianin, 2,3-dehydrosilychristin and 2,3-dehydrosilydianin were reduced, as well, and decarbonylation and cysteine conjugation proceeded. No low-molecular-weight phenolic metabolites were detected for any of the compounds tested. Strong inter-individual differences in the biotransformation profile were observed among the four fecal-material donors. In conclusion, the flavonolignans, especially at higher (pharmacological) doses, are relatively resistant to biotransformation by gut microbiota, which, however, depends strongly on the individual structures of these isomeric compounds, but also on the stool donor.
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Affiliation(s)
- Kateřina Valentová
- Laboratory of Biotransformation, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 14220 Prague, Czech Republic; (K.K.); (L.P.); (V.K.)
| | - Jaroslav Havlík
- Department of Food Science, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic; (J.H.); (J.D.J.)
| | - Pavel Kosina
- Department of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 3, 77515 Olomouc, Czech Republic; (P.K.); (J.U.)
| | - Barbora Papoušková
- Regional Centre of Advanced Technologies and Materials, Department of Analytical Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 77146 Olomouc, Czech Republic;
| | - José Diógenes Jaimes
- Department of Food Science, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic; (J.H.); (J.D.J.)
| | - Kristýna Káňová
- Laboratory of Biotransformation, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 14220 Prague, Czech Republic; (K.K.); (L.P.); (V.K.)
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technická 5, CZ 16628 Prague, Czech Republic
| | - Lucie Petrásková
- Laboratory of Biotransformation, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 14220 Prague, Czech Republic; (K.K.); (L.P.); (V.K.)
| | - Jitka Ulrichová
- Department of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 3, 77515 Olomouc, Czech Republic; (P.K.); (J.U.)
| | - Vladimír Křen
- Laboratory of Biotransformation, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 14220 Prague, Czech Republic; (K.K.); (L.P.); (V.K.)
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Thumann TA, Pferschy-Wenzig EM, Moissl-Eichinger C, Bauer R. The role of gut microbiota for the activity of medicinal plants traditionally used in the European Union for gastrointestinal disorders. JOURNAL OF ETHNOPHARMACOLOGY 2019; 245:112153. [PMID: 31408679 DOI: 10.1016/j.jep.2019.112153] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 08/09/2019] [Accepted: 08/09/2019] [Indexed: 05/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Many medicinal plants have been traditionally used for the treatment of gastrointestinal disorders. According to the monographs published by the Committee on Herbal Medicinal Products (HMPC) at the European Medicines Agency, currently 44 medicinal plants are recommended in the European Union for the treatment of gastrointestinal disorders based on traditional use. The main indications are functional and chronic gastrointestinal disorders, such as functional dyspepsia and irritable bowel syndrome (IBS), and typical effects of these plants are stimulation of gastric secretion, spasmolytic and carminative effects, soothing effects on the gastrointestinal mucosa, laxative effects, adstringent or antidiarrheal activities, and anti-inflammatory effects. A possible interaction with human gut microbiota has hardly been considered so far, although it is quite likely. AIM OF THE STUDY In this review, we aimed to identify and evaluate published studies which have investigated interactions of these plants with the gut microbiome. RESULTS According to this survey, only a minor portion of the 44 medicinal plants considered in EMA monographs for the treatment of gastrointestinal diseases has been studied so far with regard to potential interactions with gut microbiota. We could identify eight relevant in vitro studies that have been performed with six of these medicinal plants, 17 in vivo studies performed in experimental animals involving seven of the medicinal plants, and three trials in humans performed with two of the plants. The most robust evidence exists for the use of inulin as a prebiotic, and in this context also the prebiotic activity of chicory root has been investigated quite intensively. Flaxseed dietary fibers are also known to be fermented by gut microbiota to short chain fatty acids, leading to prebiotic effects. This could cause a health-beneficial modulation of gut microbiota by flaxseed supplementation. In flaxseed, also other compound classes like lignans and polyunsaturated fatty acids are present, that also have been shown to interact with gut microbiota. Drugs rich in tannins and anthocyanins also interact intensively with gut microbiota, since these compounds reach the colon at high levels in unchanged form. Tannins and anthocyanins are intensively metabolized by certain gut bacteria, leading to the generation of small, bioavailable and potentially bioactive metabolites. Moreover, interaction with these compounds may exert a prebiotic-like effect on gut microbiota. Gut microbial metabolization has also been shown for certain licorice constituents, but their potential effects on gut microbiota still need to be investigated in detail. Only a limited amount of studies investigated the interactions of essential oil- and secoiridoid-containing drugs with human gut microbiota. However, other constituents present in some of these drugs, like curcumin (curcuma), shogaol (ginger), and rosmarinic acid have been shown to be metabolized by human gut microbiota, and preliminary data also indicate potential gut microbiome modulatory effects. To conclude, the interaction with gut microbiota is still not fully investigated for many herbal drugs traditionally used for gastrointestinal disorders, which offers a vast field for future research.
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Affiliation(s)
- Timo A Thumann
- Institute of Pharmaceutical Sciences, University of Graz, Universitätsplatz 4, 8010, Graz, Austria; BioTechMed, Mozartgasse 12, 8010, Graz, Austria.
| | - Eva-Maria Pferschy-Wenzig
- Institute of Pharmaceutical Sciences, University of Graz, Universitätsplatz 4, 8010, Graz, Austria; BioTechMed, Mozartgasse 12, 8010, Graz, Austria.
| | - Christine Moissl-Eichinger
- BioTechMed, Mozartgasse 12, 8010, Graz, Austria; Internal Medicine, Medical University of Graz, Auenbruggerplatz 15, 8036, Graz, Austria.
| | - Rudolf Bauer
- Institute of Pharmaceutical Sciences, University of Graz, Universitätsplatz 4, 8010, Graz, Austria; BioTechMed, Mozartgasse 12, 8010, Graz, Austria.
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Kelly WJ, Henderson G, Pacheco DM, Li D, Reilly K, Naylor GE, Janssen PH, Attwood GT, Altermann E, Leahy SC. The complete genome sequence of Eubacterium limosum SA11, a metabolically versatile rumen acetogen. Stand Genomic Sci 2016; 11:26. [PMID: 26981167 PMCID: PMC4791908 DOI: 10.1186/s40793-016-0147-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Accepted: 03/07/2016] [Indexed: 12/22/2022] Open
Abstract
Acetogens are a specialized group of anaerobic bacteria able to produce acetate from CO2 and H2 via the Wood-Ljungdahl pathway. In some gut environments acetogens can compete with methanogens for H2, and as a result rumen acetogens are of interest in the development of microbial approaches for methane mitigation. The acetogen Eubacterium limosum SA11 was isolated from the rumen of a New Zealand sheep and its genome has been sequenced to examine its potential application in methane mitigation strategies, particularly in situations where hydrogenotrophic methanogens are inhibited resulting in increased H2 levels in the rumen. The 4.15 Mb chromosome of SA11 has an average G + C content of 47 %, and encodes 3805 protein-coding genes. There is a single prophage inserted in the chromosome, and several other gene clusters appear to have been acquired by horizontal transfer. These include genes for cell wall glycopolymers, a type VII secretion system, cell surface proteins and chemotaxis. SA11 is able to use a variety of organic substrates in addition to H2/CO2, with acetate and butyrate as the principal fermentation end-products, and genes involved in these metabolic pathways have been identified. An unusual feature is the presence of 39 genes encoding trimethylamine methyltransferase family proteins, more than any other bacterial genome. Overall, SA11 is a metabolically versatile organism, but its ability to grow on such a wide range of substrates suggests it may not be a suitable candidate to take the place of hydrogen-utilizing methanogens in the rumen.
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Affiliation(s)
- William J. Kelly
- Rumen Microbiology, Animal Science, AgResearch Limited, Grasslands Research Centre, Tennent Drive, Private Bag 11008, Palmerston North, 4442 New Zealand
| | - Gemma Henderson
- Rumen Microbiology, Animal Science, AgResearch Limited, Grasslands Research Centre, Tennent Drive, Private Bag 11008, Palmerston North, 4442 New Zealand
| | - Diana M. Pacheco
- Rumen Microbiology, Animal Science, AgResearch Limited, Grasslands Research Centre, Tennent Drive, Private Bag 11008, Palmerston North, 4442 New Zealand
| | - Dong Li
- Rumen Microbiology, Animal Science, AgResearch Limited, Grasslands Research Centre, Tennent Drive, Private Bag 11008, Palmerston North, 4442 New Zealand
| | - Kerri Reilly
- Rumen Microbiology, Animal Science, AgResearch Limited, Grasslands Research Centre, Tennent Drive, Private Bag 11008, Palmerston North, 4442 New Zealand
| | - Graham E. Naylor
- Rumen Microbiology, Animal Science, AgResearch Limited, Grasslands Research Centre, Tennent Drive, Private Bag 11008, Palmerston North, 4442 New Zealand
| | - Peter H. Janssen
- Rumen Microbiology, Animal Science, AgResearch Limited, Grasslands Research Centre, Tennent Drive, Private Bag 11008, Palmerston North, 4442 New Zealand
| | - Graeme T. Attwood
- Rumen Microbiology, Animal Science, AgResearch Limited, Grasslands Research Centre, Tennent Drive, Private Bag 11008, Palmerston North, 4442 New Zealand
| | - Eric Altermann
- Rumen Microbiology, Animal Science, AgResearch Limited, Grasslands Research Centre, Tennent Drive, Private Bag 11008, Palmerston North, 4442 New Zealand
| | - Sinead C. Leahy
- Rumen Microbiology, Animal Science, AgResearch Limited, Grasslands Research Centre, Tennent Drive, Private Bag 11008, Palmerston North, 4442 New Zealand
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Biotransformations and biological activities of hop flavonoids. Biotechnol Adv 2015; 33:1063-90. [PMID: 25708386 DOI: 10.1016/j.biotechadv.2015.02.009] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 02/13/2015] [Accepted: 02/16/2015] [Indexed: 12/13/2022]
Abstract
Female hop cones are used extensively in the brewing industry, but there is now increasing interest in possible uses of hops for non-brewing purposes, especially in the pharmaceutical industry. Among pharmaceutically important compounds from hops are flavonoids, having proven anticarcinogenic, antioxidant, antimicrobial, anti-inflammatory and estrogenic effects. In this review we aim to present current knowledge on the biotransformation of flavonoids from hop cones with respect to products, catalysis and conversion. A list of microbial enzymatic reactions associated with gastrointestinal microbiota is presented. A comparative analysis of the biological activities of hop flavonoids and their biotransformation products is described, indicating where further research has potential for applications in the pharmaceutical industry.
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