Untargeted metabolomic and lipid metabolism-related gene expression analyses of the effects and mechanism of aged Liupao tea treatment in HFD-induced obese mice
TL;DR: Aged LPT may be used as a potential dietary supplement for improving obesity-related diseases caused by an HFD, and metabolomic analysis identified 11 common differential metabolites that were partly recovered to normal levels after aged LPT treatment.
Abstract: Liupao tea (LPT) has been demonstrated to have beneficial effects on obesity induced by a high-fat diet (HFD); however, the effects and mechanism of aged Liupao tea (different storage years) treatment on obesity have not yet been reported. In this study, mice were divided into four groups as follows: the control group fed a normal diet; the model group fed an HFD; and the LPT aged 1 year (1Y) and LPT aged 10 years (10Y) groups receiving an HFD and water extractions from LPTs of different ages for 5 weeks. Our results revealed that aged LPT significantly alleviated HFD-induced obesity symptoms, especially in the 10Y group. Additionally, metabolomic analysis identified 11 common differential metabolites that were partly recovered to normal levels after aged LPT treatment, involved mainly in the metabolic pathways of the citrate cycle, purine metabolism, fatty acid metabolism, and amino acid metabolism. Aged LPT treatment also regulated lipid metabolism-related gene expression in the liver, which decreased the mRNA levels of SREBP-1C/HMGR/FAS involved in de novo lipogenesis and increased the mRNA levels of PPARα, LDLR and LCAT. Our study demonstrated that aged LPT may be used as a potential dietary supplement for improving obesity-related diseases caused by an HFD.
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Juan Wan1, Meiyan Feng1, Wenjing Pan1, Xin Zheng1, Xinya Xie1, Baozhu Hu1, Cuiqin Teng, Yingzi Wang1, Zhonghua Liu1, Jianhua Wu, Cai Shuxian1 •
TL;DR: In this article, five representative teas were selected from each of the six types of tea, and a total of 30 TEAs were selected to evaluate the inhibitory activities on the formation of aging-related amyloid in vitro.
Abstract: Aging and lipid metabolism disorders promote the formation and accumulation of amyloid with β-sheet structure, closely related to cardiovascular disease, senile dementia, type 2 diabetes, and other senile degenerative diseases. In this study, five representative teas were selected from each of the six types of tea, and a total of 30 teas were selected to evaluate the inhibitory activities on the formation of aging-related amyloid in vitro. The results showed that the 30 teas had a significant inhibitory effect on the formation activity on aging-related amyloid at the protein level in vitro. Although the content of catechins is relatively low, black tea and dark tea still have significant antioxidant activity and inhibit the formation of amyloid. A high-fat diet established the model of lipid metabolism disorder in premature aging SAMP8 mice, and these mice were gavaged different tea water extracts. The results showed that different tea types have a significant inhibitory effect on the formation of β-amyloid and Aβ42 mediated by age-related lipid metabolism disorders, and the in vivo activity of fully fermented teas was better than that of green tea. The action mechanism was related to antioxidation, anti-inflammatory, and improving lipid metabolism.
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TL;DR: Liupao tea (fermented dark tea) may improve the active function of hyperlipidemia as discussed by the authors , which can reduce the levels of total cholesterol (TC), total triglyceride, and low-density lipoprotein cholesterol (LDL-C); increase the contents of bile acids and cholesterol in feces; and improve catalase and glutathione peroxidase (GSH-Px) activities.
Abstract: Liupao tea (fermented dark tea) may improve the active function of hyperlipidemia. Utilizing a hyperlipidemia Sprague-Dawley model and UPLC-MS/MS metabolomics, we examined how the effect of Liupao and green tea extracts on hyperlipidemia and antoxidant enzyme levels and compared their constituents. The results showed that the two types of tea could reduce the levels of total cholesterol (TC), total triglyceride, and low-density lipoprotein cholesterol (LDL-C); increase the contents of bile acids and cholesterol in feces; and improve catalase and glutathione peroxidase (GSH-Px) activities. Compared with the model control group, Liupao tea effectively reduced TC and LDL-C levels by 39.53% and 58.55% and increased GSH-Px activity in the liver by 67.07%, which was better than the effect of green tea. A total of 93 compounds were identified from two samples; the amounts of alkaloids and fatty acids increased compared with green tea, and ellagic acid, hypoxanthine, and theophylline with relatively high contents in Liupao tea had a significantly positive correlation with antihyperlipidemic and antioxidant effects. Therefore, Liupao tea had better antihyperlipidemic and antioxidant activities in vivo than green tea, which might be related to the relatively high content of some active substances.
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TL;DR: In this paper , the effect of single or mixed fibers (arabinoxylan, β-glucan, xyloglucan and inulin) on the metabolome of cecum content in mice with obesity caused by a high-fat diet was demonstrated.
Abstract: The aim of this study was to demonstrate the effect of single or mixed fibers (arabinoxylan, β-glucan, xyloglucan, and inulin) on the metabolome of cecum content in mice with obesity caused by a high-fat diet. Twenty-eight six-week-old male mice were divided randomly into seven groups (n = 4/group), including a normal-diet group (CON), a high-fat-diet group (HFD), and groups with the same high-fat diet but supplemented with arabinoxylan (HFAX), arabinoxylan + β-glucan (HFAβ), arabinoxylan + xyloglucan (HFAG), xyloglucan (HFXG), and xyloglucan + inulin (HFXI). A total of 66 molecules were identified and quantified in cecum content by proton nuclear magnetic resonance (1 H-NMR). The metabolomic profiles combined with statistical analysis revealed compounds distinguishing the control group from those supplemented with fibers. In detail, a high-fat diet could significantly elevate the concentrations of acetone and methionine (p < 0.05) while decreasing the levels of methanol, arabinose, acetate, and 3-hydroxyphenylacetate (p < 0.05) in the cecum contents of mice. Compared to HFD, the supplementation caused higher levels of fumarate and hypoxanthine (p < 0.05) and lower levels of phenylacetate, acetate, fucose, formate, proline, betaine, and trimethylamine N-oxide (TMAO) (p < 0.05). An enrichment analysis highlighted that the pathways mainly altered were amino sugar metabolism, aspartate metabolism, and arginine and proline metabolism. In conclusion, non-starch polysaccharide (NSP) supplementation could change the metabolomic profiles of cecum contents in obese mice as a result of a high-fat diet. Moreover, mixed NSPs exhibited more beneficial effects than singular form on gut metabolism.
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TL;DR: In this paper , instant dark teas (IDTs) were individually liquid-state fermented using the fungi Aspergillus cristatus (A.Cristatus) and A. tubingensis.
Abstract: Instant dark teas (IDTs) were individually liquid-state fermented using the fungi Aspergillus cristatus, Aspergillus niger, and Aspergillus tubingensis. To understand how the chemical constituents of IDTs were affected by the fungi, samples were collected and measured by liquid chromatography-tandem mass-tandem mass spectrometry (LC-MS/MS). Untargeted metabolomics analysis revealed that 1,380 chemical constituents were identified in positive and negative ion modes, and 858 kinds of chemical components were differential metabolites. Through cluster analysis, IDTs were different from the blank control, and their chemical constituents mostly included carboxylic acids and their derivatives, flavonoids, organooxygen compounds, and fatty acyls. And the metabolites of IDTs fermented by A. niger and A. tubingensis had a high degree of similarity and were classified into one category, which showed that the fungus used to ferment is critical to the formation of certain qualities of IDTs. The biosynthesis of flavonoids and phenylpropanoid, which involved nine different metabolites such as p-coumarate, p-coumaroyl-CoA, caffeate, ferulate, naringenin, kaempferol, leucocyanidin, cyanidin, and (-)-epicatechin, were significant pathways influencing the quality formation of IDTs. Quantification analysis indicated that the A. tubingensis fermented-IDT had the highest content of theaflavin, theabrownin, and caffeine, while the A. cristatus fermented-IDT had the lowest content of theabrownin, and caffeine. Overall, the results provided new insights into the relationship between the quality formation of IDTs and the microorganisms used in liquid-state fermentation.
References
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TL;DR: The global epidemic of obesity results from a combination of genetic susceptibility, increased availability of high-energy foods and decreased requirement for physical activity in modern society, and should be regarded as an epidemic that threatens global well being.
Abstract: Obesity is now so common within the world's population that it is beginning to replace undernutrition and infectious diseases as the most significant contributor to ill health. In particular, obesity is associated with diabetes mellitus, coronary heart disease, certain forms of cancer, and sleep-breathing disorders. Obesity is defined by a body-mass index (weight divided by square of the height) of 30 kg m(-2) or greater, but this does not take into account the morbidity and mortality associated with more modest degrees of overweight, nor the detrimental effect of intra-abdominal fat. The global epidemic of obesity results from a combination of genetic susceptibility, increased availability of high-energy foods and decreased requirement for physical activity in modern society. Obesity should no longer be regarded simply as a cosmetic problem affecting certain individuals, but an epidemic that threatens global well being.
4,697 citations
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TL;DR: This research was supported by grants from the National Institutes of Health (HL20948) and the Perot Family Foundation.
3,626 citations
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Oscar Serrano1, Catherine E. Lovelock2, Trisha B. Atwood3, Trisha B. Atwood2, Peter I. Macreadie4, Robert Franklin C Canto2, Stuart R. Phinn2, Ariane Arias-Ortiz5, Le Bai6, Jeff Baldock7, Camila Bedulli8, Camila Bedulli9, Paul E. Carnell4, Rod M. Connolly10, Paul Donaldson, Alba Esteban1, Carolyn J. Ewers Lewis4, Bradley D. Eyre11, Matthew A. Hayes10, Matthew A. Hayes2, Pierre Horwitz1, Lindsay B. Hutley6, Christopher R. J. Kavazos1, Christopher R. J. Kavazos12, Jeffrey J. Kelleway13, Gary A. Kendrick8, Kieryn Kilminster14, Kieryn Kilminster8, Anna Lafratta1, Shing Lee10, Shing Lee15, Paul S. Lavery1, Paul S. Lavery16, Damien T. Maher11, Núria Marbà16, Pere Masqué, Miguel Ángel Mateo16, Miguel Ángel Mateo1, RE Mount17, Peter J. Ralph18, Chris Roelfsema2, Mohammad Rozaimi19, Mohammad Rozaimi1, Radhiyah Ruhon8, Radhiyah Ruhon20, Cristian Salinas1, Jimena Samper-Villarreal21, Jimena Samper-Villarreal2, Jonathan Sanderman7, Jonathan Sanderman22, Christian J. Sanders11, Isaac R. Santos11, C Sharples17, Andrew D. L. Steven7, Toni Cannard7, Stacey M. Trevathan-Tackett4, Carlos M. Duarte23, Carlos M. Duarte8 •
Edith Cowan University1, University of Queensland2, Utah State University3, Deakin University4, Autonomous University of Barcelona5, Charles Darwin University6, Commonwealth Scientific and Industrial Research Organisation7, University of Western Australia8, Sao Paulo State University9, Griffith University10, Southern Cross University11, University of New South Wales12, University of Wollongong13, Department of Water14, The Chinese University of Hong Kong15, Spanish National Research Council16, University of Tasmania17, University of Technology, Sydney18, National University of Malaysia19, Hasanuddin University20, University of Costa Rica21, Woods Hole Research Center22, King Abdullah University of Science and Technology23
TL;DR: This assessment, the most comprehensive for any nation to-date, demonstrates the potential of conservation and restoration of VCE to underpin national policy development for reducing greenhouse gas emissions.
Abstract: Policies aiming to preserve vegetated coastal ecosystems (VCE; tidal marshes, mangroves and seagrasses) to mitigate greenhouse gas emissions require national assessments of blue carbon resources. Here, we present organic carbon (C) storage in VCE across Australian climate regions and estimate potential annual CO2 emission benefits of VCE conservation and restoration. Australia contributes 5–11% of the C stored in VCE globally (70–185 Tg C in aboveground biomass, and 1,055–1,540 Tg C in the upper 1 m of soils). Potential CO2 emissions from current VCE losses are estimated at 2.1–3.1 Tg CO2-e yr-1, increasing annual CO2 emissions from land use change in Australia by 12–21%. This assessment, the most comprehensive for any nation to-date, demonstrates the potential of conservation and restoration of VCE to underpin national policy development for reducing greenhouse gas emissions. Policies aiming to preserve vegetated coastal ecosystems (VCE) to mitigate greenhouse gas emissions require national assessments of blue carbon resources. Here the authors assessed organic carbon storage in VCE across Australian and the potential annual CO2 emission benefits of VCE conservation and find that Australia contributes substantially the carbon stored in VCE globally.
1,462 citations
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TL;DR: It is demonstrated that AMPK interacts with and directly phosphorylates sterol regulatory element binding proteins (SREBP-1c and -2) and AMPK-dependent phosphorylation of SREBP may offer therapeutic strategies to combat insulin resistance, dyslipidemia, and atherosclerosis.
1,335 citations
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TL;DR: The introduction, regulation and energetics of TCA cycle have been discussed and the present study was carried out to review literature on T CA cycle.
Abstract: The citric acid cycle is the final common oxidative pathway for carbohydrates, fats and amino acids. It is the most important metabolic pathway for the energy supply to the body. TCA is the most important central pathway connecting almost all the individual metabolic pathways. In this review article, introduction, regulation and energetics of TCA cycle have been discussed. The present study was carried out to review literature on TCA cycle.
422 citations