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Naghipour S, Cox AJ, Fisher JJ, Plan M, Stark T, West N, Peart JN, Headrick JP, Du Toit EF. Circulating TMAO, the gut microbiome and cardiometabolic disease risk: an exploration in key precursor disorders. Diabetol Metab Syndr 2024; 16:133. [PMID: 38886825 PMCID: PMC11181661 DOI: 10.1186/s13098-024-01368-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 05/29/2024] [Indexed: 06/20/2024] Open
Abstract
BACKGROUND Elevations in the gut metabolite trimethylamine-N-oxide (TMAO) have been linked to cardiovascular and metabolic diseases. Whether elevated TMAO levels reflect early mechanistic involvement or a sequela of evolving disease awaits elucidation. The purpose of this study was to further explore these potential associations. METHODS We investigated relationships between circulating levels of TMAO and its pre-cursor substrates, dietary factors, gut microbiome profiles and disease risk in individuals with a Healthy BMI (18.5 < BMI < 25, n = 41) or key precursor states for cardiometabolic disease: Overweight (25 < BMI < 30 kg/m2, n = 33), Obese (BMI > 30, n = 27) and Metabolic Syndrome (MetS; ≥ 3 ATPIII report criteria, n = 39). RESULTS Unexpectedly, plasma [TMAO] did not vary substantially between groups (means of 3-4 µM; p > 0.05), although carnitine was elevated in participants with MetS. Gut microbial diversity and Firmicutes were also significantly reduced in the MetS group (p < 0.05). Exploratory analysis across diverse parameters reveals significant correlations between circulating [TMAO] and seafood intake (p = 0.007), gut microbial diversity (p = 0.017-0.048), and plasma [trimethylamine] (TMA; p = 0.001). No associations were evident with anthropometric parameters or cardiometabolic disease risk. Most variance in [TMAO] within and between groups remained unexplained. CONCLUSIONS Data indicate that circulating [TMAO] may be significantly linked to seafood intake, levels of TMA substrate and gut microbial diversity across healthy and early disease phenotypes. However, mean concentrations remain < 5 µM, with little evidence of links between TMAO and cardiometabolic disease risk. These observations suggest circulating TMAO may not participate mechanistically in cardiometabolic disease development, with later elevations likely a detrimental sequela of extant disease.
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Affiliation(s)
- Saba Naghipour
- School of Pharmacy and Medical Sciences, Griffith University, Southport, QLD, 4215, Australia
| | - Amanda J Cox
- School of Pharmacy and Medical Sciences, Griffith University, Southport, QLD, 4215, Australia
- Menzies Health Institute Queensland, Griffith University, Parklands Drive, Southport, QLD, 4215, Australia
| | - Joshua J Fisher
- School of Medicine and Public Health, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Manuel Plan
- Metabolomics Australia (Queensland Node), The University of Queensland, St. Lucia, QLD, 4072, Australia
- Metabolomics Facility, QIMR Berghofer Medical Research Institute, 300 Herston Rd, Herston, QLD, 4006, Australia
| | - Terra Stark
- Metabolomics Australia (Queensland Node), The University of Queensland, St. Lucia, QLD, 4072, Australia
| | - Nic West
- School of Pharmacy and Medical Sciences, Griffith University, Southport, QLD, 4215, Australia
- Menzies Health Institute Queensland, Griffith University, Parklands Drive, Southport, QLD, 4215, Australia
| | - Jason N Peart
- School of Pharmacy and Medical Sciences, Griffith University, Southport, QLD, 4215, Australia
| | - John P Headrick
- School of Pharmacy and Medical Sciences, Griffith University, Southport, QLD, 4215, Australia
| | - Eugene F Du Toit
- School of Pharmacy and Medical Sciences, Griffith University, Southport, QLD, 4215, Australia.
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Fu Y, Li S, Xiao Y, Liu G, Fang J. A Metabolite Perspective on the Involvement of the Gut Microbiota in Type 2 Diabetes. Int J Mol Sci 2023; 24:14991. [PMID: 37834439 PMCID: PMC10573635 DOI: 10.3390/ijms241914991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 09/30/2023] [Accepted: 10/03/2023] [Indexed: 10/15/2023] Open
Abstract
Type 2 diabetes (T2D) is a commonly diagnosed condition that has been extensively studied. The composition and activity of gut microbes, as well as the metabolites they produce (such as short-chain fatty acids, lipopolysaccharides, trimethylamine N-oxide, and bile acids) can significantly impact diabetes development. Treatment options, including medication, can enhance the gut microbiome and its metabolites, and even reverse intestinal epithelial dysfunction. Both animal and human studies have demonstrated the role of microbiota metabolites in influencing diabetes, as well as their complex chemical interactions with signaling molecules. This article focuses on the importance of microbiota metabolites in type 2 diabetes and provides an overview of various pharmacological and dietary components that can serve as therapeutic tools for reducing the risk of developing diabetes. A deeper understanding of the link between gut microbial metabolites and T2D will enhance our knowledge of the disease and may offer new treatment approaches. Although many animal studies have investigated the palliative and attenuating effects of gut microbial metabolites on T2D, few have established a complete cure. Therefore, conducting more systematic studies in the future is necessary.
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Affiliation(s)
| | | | | | - Gang Liu
- Hunan Provincial Engineering Research Center of Applied Microbial Resources Development for Livestock and Poultry, College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China; (Y.F.); (S.L.); (Y.X.)
| | - Jun Fang
- Hunan Provincial Engineering Research Center of Applied Microbial Resources Development for Livestock and Poultry, College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China; (Y.F.); (S.L.); (Y.X.)
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3
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Zhang H, Yao G. Significant correlation between the gut microbiota-derived metabolite trimethylamine-N-oxide and the risk of stroke: evidence based on 23 observational studies. Eur J Clin Nutr 2023; 77:731-740. [PMID: 35468932 DOI: 10.1038/s41430-022-01104-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 02/05/2022] [Accepted: 02/09/2022] [Indexed: 11/08/2022]
Abstract
The gut microbiota-derived metabolite trimethylamine-N-oxide (TMAO) is regarded as a major risk factor for cardiovascular events and diabetes. However, the association of TMAO with stroke has yet to be fully elucidated. The present meta-analysis was conducted to explore the association between TMAO and stroke. The present meta-analysis quantitatively summarized the results of studies that investigated the association between TMAO and stroke. The PubMed, Embase, Cochrane Library and Web of Science databases were systematically searched from January 1, 2001 to June 1, 2021. All studies that evaluated the association between TMAO and stroke were included in the present systematic review. The present meta-analysis included 30,808 participants and revealed that being in the higher TMAO category increased the odds of stroke by 68% (OR 1.83; 95% CI 1.02-3.29; P = 0.04), and that the mean TMAO concentration in stroke patients was 2.20 μmol/L higher than that of non-stroke controls (MD 2.20; 95% CI 1.23-3.16; P < 0.00001). In addition, TMAO plasma levels was associated with the risk of all-cause mortality, with a pooled HR of 1.89 (95% CI 1.15-3.08; P = 0.01). Both univariate analysis (UVA) and multivariate analysis (MVA) indicated that high TMAO levels significantly increased the risk of major adverse cardiovascular events (MACEs), with pooled RRs of 2.26 (95% CI 2.01-2.54; P < 0.00001) with UVA and 1.55 (95% CI 1.17-2.05; P = 0.002) with MVA respectively. In the current meta-analysis we revealed the positive association between circulating TMAO and stroke. Higher TMAO levels increased the risk of stroke and stroke patients experienced higher mean TMAO concentration. In addition, high TMAO plasma level was one of independent risk factors of MACEs and was associated with all-cause mortality.
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Affiliation(s)
- Hongmei Zhang
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710089, China.
| | - Guifen Yao
- Department of Neurology, Sanming First Hospital, Sanming, 365000, China
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Huang L, Yu L, Yin X, Lin Y, Xu Y, Niu Y. Silver nanoparticles with vanadium oxide nanowires loaded into electrospun dressings for efficient healing of bacterium-infected wounds. J Colloid Interface Sci 2022; 622:117-125. [DOI: 10.1016/j.jcis.2022.04.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 04/04/2022] [Accepted: 04/05/2022] [Indexed: 12/21/2022]
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Liu M, Huang Y, Zhang H, Aitken D, Nevitt MC, Rockel JS, Pelletier JP, Lewis CE, Torner J, Rampersaud YR, Perruccio AV, Mahomed NN, Furey A, Randell EW, Rahman P, Sun G, Martel-Pelletier J, Kapoor M, Jones G, Felson D, Qi D, Zhai G. Restricting Branched-Chain Amino Acids within a High-Fat Diet Prevents Obesity. Metabolites 2022; 12:334. [PMID: 35448521 PMCID: PMC9030079 DOI: 10.3390/metabo12040334] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/01/2022] [Accepted: 04/04/2022] [Indexed: 02/01/2023] Open
Abstract
Obesity is a global pandemic, but there is yet no effective measure to control it. Recent metabolomics studies have identified a signature of altered amino acid profiles to be associated with obesity, but it is unclear whether these findings have actionable clinical potential. The aims of this study were to reveal the metabolic alterations of obesity and to explore potential strategies to mitigate obesity. We performed targeted metabolomic profiling of the plasma/serum samples collected from six independent cohorts and conducted an individual data meta-analysis of metabolomics for body mass index (BMI) and obesity. Based on the findings, we hypothesized that restriction of branched-chain amino acids (BCAAs), phenylalanine, or tryptophan may prevent obesity and tested our hypothesis in a dietary restriction trial with eight groups of 4-week-old male C57BL/6J mice (n = 5/group) on eight different types of diets, respectively, for 16 weeks. A total of 3397 individuals were included in the meta-analysis. The mean BMI was 30.7 ± 6.1 kg/m2, and 49% of participants were obese. Fifty-eight metabolites were associated with BMI and obesity (all p ≤ 2.58 × 10-4), linked to alterations of the BCAA, phenylalanine, tryptophan, and phospholipid metabolic pathways. The restriction of BCAAs within a high-fat diet (HFD) maintained the mice's weight, fat and lean volume, subcutaneous and visceral adipose tissue weight, and serum glucose and insulin at levels similar to those in the standard chow group, and prevented obesity, adipocyte hypertrophy, adipose inflammation, and insulin resistance induced by HFD. Our data suggest that four metabolic pathways, BCAA, phenylalanine, tryptophan, and phospholipid metabolic pathways, are altered in obesity and restriction of BCAAs within a HFD can prevent the development of obesity and insulin resistance in mice, providing a promising strategy to potentially mitigate diet-induced obesity.
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Affiliation(s)
- Ming Liu
- Division of Biomedical Sciences (Genetics), Faculty of Medicine, Memorial University of Newfoundland, St. John’s, NL A1B 3V6, Canada;
| | - Yiheng Huang
- College of Pharmacy, University of Manitoba, Winnipeg, MB R3E 0T5, Canada; (Y.H.); (D.Q.)
| | - Hongwei Zhang
- Discipline of Medicine, Faculty of Medicine, Memorial University of Newfoundland, St. John’s, NL A1B 3V6, Canada; (H.Z.); (P.R.); (G.S.)
| | - Dawn Aitken
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS 7000, Australia; (D.A.); (G.J.)
| | - Michael C. Nevitt
- Department of Epidemiology and Biostatistics, University of California, San Francisco, CA 94158, USA;
| | - Jason S. Rockel
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, Toronto, ON M5T 2S8, Canada; (J.S.R.); (Y.R.R.); (A.V.P.); (N.N.M.); (M.K.)
| | - Jean-Pierre Pelletier
- Osteoarthritis Research Unit, University of Montreal Hospital Research Centre (CRCHUM), Montreal, QC H2X 0A9, Canada; (J.-P.P.); (J.M.-P.)
| | - Cora E. Lewis
- Department of Epidemiology, University of Alabama, Birmingham, AL 35233, USA;
| | - James Torner
- Department of Epidemiology, University of Iowa, Iowa City, IA 52242, USA;
| | - Yoga Raja Rampersaud
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, Toronto, ON M5T 2S8, Canada; (J.S.R.); (Y.R.R.); (A.V.P.); (N.N.M.); (M.K.)
| | - Anthony V. Perruccio
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, Toronto, ON M5T 2S8, Canada; (J.S.R.); (Y.R.R.); (A.V.P.); (N.N.M.); (M.K.)
- Institute of Health Policy, Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto, ON M5T 2S8, Canada
| | - Nizar N. Mahomed
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, Toronto, ON M5T 2S8, Canada; (J.S.R.); (Y.R.R.); (A.V.P.); (N.N.M.); (M.K.)
- Department of Surgery, University of Toronto, Toronto, ON M5T 2S8, Canada
| | - Andrew Furey
- Discipline of Surgery, Faculty of Medicine, Memorial University of Newfoundland, St. John’s, NL A1B 3V6, Canada;
- Office of the Premier, Government of Newfoundland and Labrador, St. John’s, NL A1B 4J6, Canada
| | - Edward W. Randell
- Discipline of Laboratory Medicine, Faculty of Medicine, Memorial University of Newfoundland, St. John’s, NL A1B 3V6, Canada;
| | - Proton Rahman
- Discipline of Medicine, Faculty of Medicine, Memorial University of Newfoundland, St. John’s, NL A1B 3V6, Canada; (H.Z.); (P.R.); (G.S.)
| | - Guang Sun
- Discipline of Medicine, Faculty of Medicine, Memorial University of Newfoundland, St. John’s, NL A1B 3V6, Canada; (H.Z.); (P.R.); (G.S.)
| | - Johanne Martel-Pelletier
- Osteoarthritis Research Unit, University of Montreal Hospital Research Centre (CRCHUM), Montreal, QC H2X 0A9, Canada; (J.-P.P.); (J.M.-P.)
| | - Mohit Kapoor
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, Toronto, ON M5T 2S8, Canada; (J.S.R.); (Y.R.R.); (A.V.P.); (N.N.M.); (M.K.)
| | - Graeme Jones
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS 7000, Australia; (D.A.); (G.J.)
| | - David Felson
- Department of Rheumatology, Boston University School of Medicine, Boston, MA 02118, USA;
- NIHR Manchester Biomedical Research Centre, Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, Manchester M13 9WL, UK
| | - Dake Qi
- College of Pharmacy, University of Manitoba, Winnipeg, MB R3E 0T5, Canada; (Y.H.); (D.Q.)
| | - Guangju Zhai
- Division of Biomedical Sciences (Genetics), Faculty of Medicine, Memorial University of Newfoundland, St. John’s, NL A1B 3V6, Canada;
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Johri AM, Hétu MF, Heyland DK, Herr JE, Korol J, Froese S, Norman PA, Day AG, Matangi MF, Michos ED, LaHaye SA, Saunders FW, Spence JD. Progression of atherosclerosis with carnitine supplementation: a randomized controlled trial in the metabolic syndrome. Nutr Metab (Lond) 2022; 19:26. [PMID: 35366920 PMCID: PMC8976995 DOI: 10.1186/s12986-022-00661-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 03/22/2022] [Indexed: 01/22/2023] Open
Abstract
Background L-carnitine (L-C), a ubiquitous nutritional supplement, has been investigated as a potential therapy for cardiovascular disease, but its effects on human atherosclerosis are unknown. Clinical studies suggest improvement of some cardiovascular risk factors, whereas others show increased plasma levels of pro-atherogenic trimethylamine N-oxide. The primary aim was to determine whether L-C therapy led to progression or regression of carotid total plaque volume (TPV) in participants with metabolic syndrome (MetS).
Methods This was a phase 2, prospective, double blinded, randomized, placebo-controlled, two-center trial. MetS was defined as ≥ 3/5 cardiac risk factors: elevated waist circumference; elevated triglycerides; reduced HDL-cholesterol; elevated blood pressure; elevated glucose or HbA1c; or on treatment. Participants with a baseline TPV ≥ 50 mm3 were randomized to placebo or 2 g L-C daily for 6 months.
Results The primary outcome was the percent change in TPV over 6 months. In 157 participants (L-C N = 76, placebo N = 81), no difference in TPV change between arms was found. The L-C group had a greater increase in carotid atherosclerotic stenosis of 9.3% (p = 0.02) than the placebo group. There was a greater increase in total cholesterol and LDL-C levels in the L-C arm. Conclusions Though total carotid plaque volume did not change in MetS participants taking L-C over 6-months, there was a concerning progression of carotid plaque stenosis. The potential harm of L-C in MetS and its association with pro-atherogenic metabolites raises concerns for its further use as a potential therapy and its widespread availability as a nutritional supplement. Trial registration: ClinicalTrials.gov, NCT02117661, Registered April 21, 2014, https://clinicaltrials.gov/ct2/show/NCT02117661. Supplementary Information The online version contains supplementary material available at 10.1186/s12986-022-00661-9.
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Affiliation(s)
- Amer M Johri
- Department of Medicine, Cardiovascular Imaging Network at Queen's University, Kingston, ON, Canada. .,Department of Medicine, Queen's University, 76 Stuart Street, KGH FAPC 3, Kingston, ON, K7L 2V7, Canada.
| | - Marie-France Hétu
- Department of Medicine, Cardiovascular Imaging Network at Queen's University, Kingston, ON, Canada
| | - Daren K Heyland
- Department of Critical Care Medicine, Clinical Evaluation Research Unit, Kingston, ON, Canada
| | - Julia E Herr
- Department of Medicine, Cardiovascular Imaging Network at Queen's University, Kingston, ON, Canada
| | - Jennifer Korol
- Department of Critical Care Medicine, Clinical Evaluation Research Unit, Kingston, ON, Canada
| | - Shawna Froese
- Department of Critical Care Medicine, Clinical Evaluation Research Unit, Kingston, ON, Canada
| | | | - Andrew G Day
- Kingston Health Sciences Centre, Kingston, ON, Canada
| | | | - Erin D Michos
- Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, USA
| | - Stephen A LaHaye
- Department of Medicine, Queen's University, 76 Stuart Street, KGH FAPC 3, Kingston, ON, K7L 2V7, Canada
| | - Fraser W Saunders
- Southeastern Ontario Vascular Laboratory, Kingston Health Sciences Centre, Kingston, ON, Canada
| | - J David Spence
- Stroke Prevention and Atherosclerosis Research Centre, University of Western Ontario, London, ON, Canada
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Li D, Lu Y, Yuan S, Cai X, He Y, Chen J, Wu Q, He D, Fang A, Bo Y, Song P, Bogaert D, Tsilidis K, Larsson SC, Yu H, Zhu H, Theodoratou E, Zhu Y, Li X. Gut microbiota-derived metabolite trimethylamine-N-oxide and multiple health outcomes: an umbrella review and updated meta-analysis. Am J Clin Nutr 2022; 116:230-243. [PMID: 35348578 PMCID: PMC9257469 DOI: 10.1093/ajcn/nqac074] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 03/24/2022] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Trimethylamine-N-oxide (TMAO) is a gut microbiota-derived metabolite produced from dietary nutrients. Many studies have discovered that circulating TMAO concentrations are linked to a wide range of health outcomes. OBJECTIVES This study aimed to summarize health outcomes related to circulating TMAO concentrations. METHODS We searched the Embase, Medline, Web of Science, and Scopus databases from inception to 15 February, 2022 to identify and update meta-analyses examining the associations between TMAO and multiple health outcomes. For each health outcome, we estimated the summary effect size, 95% prediction CI, between-study heterogeneity, evidence of small-study effects, and evidence of excess-significance bias. These metrics were used to evaluate the evidence credibility of the identified associations. RESULTS This umbrella review identified 24 meta-analyses that investigated the association between circulating TMAO concentrations and health outcomes including all-cause mortality, cardiovascular diseases (CVDs), diabetes mellitus (DM), cancer, and renal function. We updated these meta-analyses by including a total of 82 individual studies on 18 unique health outcomes. Among them, 14 associations were nominally significant. After evidence credibility assessment, we found 6 (33%) associations (i.e., all-cause mortality, CVD mortality, major adverse cardiovascular events, hypertension, DM, and glomerular filtration rate) to present highly suggestive evidence. CONCLUSIONS TMAO might be a novel biomarker related to human health conditions including all-cause mortality, hypertension, CVD, DM, cancer, and kidney function. Further studies are needed to investigate whether circulating TMAO concentrations could be an intervention target for chronic disease.This review was registered at www.crd.york.ac.uk/prospero/ as CRD42021284730.
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Affiliation(s)
- Doudou Li
- Department of Big Data in Health Science, School of Public Health, Center of Clinical Big Data and Analytics of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Ying Lu
- Department of Big Data in Health Science, School of Public Health, Center of Clinical Big Data and Analytics of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Shuai Yuan
- Department of Big Data in Health Science, School of Public Health, Center of Clinical Big Data and Analytics of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China,Unit of Cardiovascular and Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
| | - Xiaxia Cai
- Department of Nutrition and Food Hygiene, Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Beijing, China
| | - Yuan He
- National Research Institute for Health and Family Planning, Beijing, China
| | - Jie Chen
- Department of Big Data in Health Science, School of Public Health, Center of Clinical Big Data and Analytics of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Qiong Wu
- Department of Epidemiology & Biostatistics, School of Public Health, Zhejiang University School of Medicine, Hangzhou, China
| | - Di He
- Department of Epidemiology & Biostatistics, School of Public Health, Zhejiang University School of Medicine, Hangzhou, China
| | - Aiping Fang
- Department of Nutrition, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Yacong Bo
- Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China
| | - Peige Song
- School of Public Health and Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Debby Bogaert
- Centre for Inflammation Research, University of Edinburgh, Edinburgh, United Kingdom
| | - Kostas Tsilidis
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, United Kingdom,Department of Hygiene and Epidemiology, University of Ioannina School of Medicine, Ioannina, Greece
| | - Susanna C Larsson
- Unit of Cardiovascular and Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden,Unit of Medical Epidemiology, Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | - Huanling Yu
- Department of Nutrition and Food Hygiene, Beijing Key Laboratory of Environmental Toxicology, School of Public Health, Capital Medical University, Beijing, China
| | - Huilian Zhu
- Department of Nutrition, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Evropi Theodoratou
- Centre for Global Health, Usher Institute, University of Edinburgh, Edinburgh, United Kingdom,Cancer Research UK Edinburgh Centre, Medical Research Council Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, United Kingdom
| | - Yimin Zhu
- Department of Epidemiology & Biostatistics, School of Public Health, Zhejiang University School of Medicine, Hangzhou, China
| | - Xue Li
- Address correspondence to XL (E-mail: )
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Song J, Liu G, Song Y, Jiao K, Wang S, Cao T, Yu J, Wei Y. Positive effect of compound amino acid chelated calcium from the shell and skirt of scallop in an ovariectomized rat model of postmenopausal osteoporosis. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:1363-1371. [PMID: 34358348 DOI: 10.1002/jsfa.11468] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 07/18/2021] [Accepted: 08/06/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Osteoporosis has become an important public health issue with the increase of aging population, and afflicts millions of people worldwide, particularly elderly or postmenopausal women. In the present study, we prepared compound amino acid chelated calcium (CAA-Ca) from processing by-products of Chlamys farreri, and evaluated its effect on postmenopausal osteoporosis with an ovariectomized (OVX) rat model. RESULTS A 60-day treatment of OVX rats with CAA-Ca significantly enhanced the bone mineral density (BMD) and the bone calcium content. Meanwhile, some bone morphometric parameters, trabecular bone number (Tb.N), trabecular bone volume fraction (BV/TV), trabecular bone thickness (Tb.Th) and cortical bone wall thickness (Ct.Th), were also increased by 8.20%, 118.18%, 32.99% and 19.10%, respectively. In addition, the alkaline phosphatase (ALP) levels in serum were significantly reduced after CAA-Ca treatment, while the blood calcium levels were increased. Mechanistically, CAA-Ca down-regulated the levels of receptor activator of nuclear factor-κB (RANK) and receptor activator of nuclear factor-κB ligand (RANKL), and up-regulated osteoprotegerin (OPG) levels in osteoclasts, inhibiting bone resorption and bone loss. Meanwhile, CAA-Ca treatment raised β-catenin levels and lowered Dickkopf1 (DKK1) levels in the Wnt signaling pathway of osteoblasts, which can promote calcium absorption and bone formation. CONCLUSION The results suggested that CAA-Ca promoted bone formation, inhibited bone resorption and improved bone microstructure. Therefore, this study contributes to the potential application of CAA-Ca as a functional food resource in the treatment of postmenopausal osteoporosis. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Jiale Song
- College of Life Sciences, Qingdao University, Qingdao, China
| | - Guofeng Liu
- Qingdao Women and Children's Hospital, Qingdao, China
| | - Yahui Song
- College of Life Sciences, Qingdao University, Qingdao, China
| | - Kui Jiao
- College of Life Sciences, Qingdao University, Qingdao, China
| | | | | | - Jia Yu
- College of Life Sciences, Qingdao University, Qingdao, China
| | - Yuxi Wei
- College of Life Sciences, Qingdao University, Qingdao, China
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Lu M, Sun J, Zhao Y, Zhang H, Li X, Zhou J, Dang H, Zhang J, Huang W, Qi C, Li D. Prevention of High-Fat Diet-Induced Hypercholesterolemia by Lactobacillus reuteri Fn041 Through Promoting Cholesterol and Bile Salt Excretion and Intestinal Mucosal Barrier Functions. Front Nutr 2022; 9:851541. [PMID: 35369106 PMCID: PMC8967143 DOI: 10.3389/fnut.2022.851541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 02/17/2022] [Indexed: 12/12/2022] Open
Abstract
Objectives: Lactobacillus reuteri Fn041 (Fn041) is a probiotic isolated from immunoglobulin A coated microbiota in the human breast milk of Gannan in China with a low incidence of hypercholesterolemia. This study aims to explore the role and mechanism of Fn041 in preventing hypercholesterolemia caused by a high-fat diet in mice. Methods C57BL/6N mice were fed a low-fat diet or a high-fat diet and gavage with Fn041 and Lactobacillus rhamnosus GG (LGG) for 8 weeks. Results Both Fn041 and LGG prevented the occurrence of hypercholesterolemia, liver and testicular fat accumulation. In addition, a high-fat diet causes intestinal dysbiosis and mucosal barrier damage, which is associated with hypercholesterolemia. Fn041 prevented the high-fat diet-induced reduction in alpha diversity of intestinal microbiota and intestinal mucosal barrier damage. Fn041 treatment significantly increased fecal total cholesterol and total bile acids. Conclusions Fn041 prevented hypercholesterolemia by enhancing cholesterol excretion and mucosal barrier function.
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Affiliation(s)
- Mengyao Lu
- Institute of Nutrition and Health, Qingdao University, Qingdao, China
| | - Jin Sun
- Institute of Nutrition and Health, Qingdao University, Qingdao, China
| | - Yuning Zhao
- Institute of Nutrition and Health, Qingdao University, Qingdao, China
| | - Haowen Zhang
- Institute of Nutrition and Health, Qingdao University, Qingdao, China
| | - Xinyue Li
- Institute of Nutrition and Health, Qingdao University, Qingdao, China
| | - Jingbo Zhou
- Institute of Nutrition and Health, Qingdao University, Qingdao, China
| | - Hongyang Dang
- Institute of Nutrition and Health, Qingdao University, Qingdao, China
| | - Jidong Zhang
- Department of Cardiology, The Affiliated Hospital of Medical College, Qingdao University, Qingdao, China
| | - Wenjing Huang
- Department of Paediatrics, The Affiliated Hospital of Medical College, Qingdao University, Qingdao, China
| | - Ce Qi
- Institute of Nutrition and Health, Qingdao University, Qingdao, China
- *Correspondence: Ce Qi
| | - Duo Li
- Institute of Nutrition and Health, Qingdao University, Qingdao, China
- Duo Li
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10
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Ink melanin from Sepiapharaonis ameliorates colitis in mice via reducing oxidative stress, andprotecting the intestinal mucosal barrier. Food Res Int 2022; 151:110888. [PMID: 34980415 DOI: 10.1016/j.foodres.2021.110888] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 11/08/2021] [Accepted: 12/08/2021] [Indexed: 12/16/2022]
Abstract
Melanin is the major component from Sepiapharaonis ink (MSI), and its anti-inflammatory and antioxidant activities indicate the potential for improvement of inflammatory bowel diseases. The study aimed to investigate how orally-administered MSI on alleviating the dextran sulfate sodium (DSS)-induced ulcerative colitis (UC) and the potential mechanisms. We found that MSI significantly improved DSS-induced weight loss, colon shortening, hematochezia, DAI score, histopathology, and antioxidant indices (SOD and MDA). Further analysis demonstrated that MSI could significantly down-regulate the expression of pro-inflammatory cytokines (TNF-α, IL-1β and IFN-γ) and up-regulate the concentration of anti-inflammatory cytokine IL-10 by regulating TLR4/NF-κB and NLRP3/ASC/Caspase-1 signal pathway. Moreover, tight junction proteins in melanin groups were also maintained by ZO-1 and occludin expressions. In addition, MSI also regulated cellular apoptosis by reducing the expression of pro-apoptosis protein Caspase-3. Interestingly, MSI treatments increased the proportion of dominant bacteria (such as Bacteroidetes and Clostridium) and the abundance of community (alpha diversity, β-diversity, etc.), which significantly balanced microbiota in a dose-dependent manner. In conclusion, oral administration of MSI alleviated DSS-induced colitis by modulating inflammatory cytokines and oxidation stress, maintaining the mucosal barrier, and reverting microbiota changes.
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11
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Iliceto M, Stensen M, Andersen J, Haugen T, Witczak O. Levels of L-carnitine in human seminal plasma are associated with sperm fatty acid composition. Asian J Androl 2022; 24:451-457. [PMID: 35017387 PMCID: PMC9491039 DOI: 10.4103/aja2021107] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The fatty acid composition of spermatozoa has been shown to be important for their function, and L-carnitine is crucial for fatty acid metabolism. Its levels in the seminal plasma positively correlate with semen quality, whereas high body mass index (BMI) is associated with both reduced semen quality and altered sperm fatty acid composition. Here, we examined the associations between free seminal L-carnitine levels and sperm fatty acid composition as well as BMI. Semen samples were collected and analyzed from 128 men with unknown fertility status and with BMI ranging from 19 kg m−2 to 63 kg m−2. Sperm fatty acid composition was assessed by gas chromatography, while free seminal L-carnitine analysis was performed using high-performance liquid chromatography. Multiple linear regression analysis showed a positive correlation of free seminal L-carnitine levels with the amount of sperm palmitic acid (β = 0.21; P = 0.014), docosahexaenoic acid (DHA; β = 0.23; P = 0.007), and total n-3 polyunsaturated fatty acids (β = 0.23; P = 0.008) and a negative correlation of free seminal L-carnitine levels with lignoceric acid (β = −0.29; P = 0.001) and total n-6 polyunsaturated fatty acids (β = −0.24; P = 0.012) when adjusted for covariates. There was no relationship between free seminal L-carnitine levels and BMI. Since free seminal L-carnitine levels are associated with semen quality, the absence of a correlation with BMI suggests that reduced semen quality in obese men is independent of seminal L-carnitine.
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12
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Low Molecular Weight, 4- O-Sulfation, and Sulfation at Meta-Fucose Positively Promote the Activities of Sea Cucumber Fucoidans on Improving Insulin Resistance in HFD-Fed Mice. Mar Drugs 2021; 20:md20010037. [PMID: 35049893 PMCID: PMC8781073 DOI: 10.3390/md20010037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 12/27/2021] [Accepted: 12/27/2021] [Indexed: 11/17/2022] Open
Abstract
Fucoidans from sea cucumber (SC-FUC) have been proven to alleviate insulin resistance in several species. However, there are few studies that clarify the relationship between their structure and bioactivity. The present study evaluated the influence of molecular weight (Mw), sulfation concentrations (Cs), and sulfation position on improving insulin resistance using SC-FUC. Results showed that fucoidans with lower Mw exerted stronger effects. Having a similar Mw, Acaudina molpadioides fucoidans (Am-FUC) with lower Cs and Holothuria tubulosa fucoidans with higher Cs showed similar activities. However, Isostichopus badionotus fucoidans (higher Cs) activity was superior to that of low-Mw Thelenota ananas fucoidans (Ta-LFUC, lower Cs). Eliminating the effects of Mw and Cs, the bioactivity of Am-FUC with sulfation at meta-fucose exceeded that of Ta-FUC with sulfation at ortho-position. Moreover, the effects of Pearsonothuria graeffei fucoidans with 4-O-sulfation were superior to those of Am-LFUC with 2-O-sulfation. These data indicate that low Mw, 4-O-sulfation, and sulfation at meta-fucose contributed considerably to insulin resistance alleviation by SC-FUC, which could accelerate the development of SC-FUC as a potential food supplement to alleviate insulin resistance.
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13
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Ten-year changes in plasma L-carnitine levels and risk of coronary heart disease. Eur J Nutr 2021; 61:1353-1362. [PMID: 34799774 DOI: 10.1007/s00394-021-02713-x] [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: 03/11/2021] [Accepted: 10/13/2021] [Indexed: 10/19/2022]
Abstract
PURPOSE L-Carnitine is abundant in animal source foods, particularly red meat, and circulating L-carnitine may be related to the incidence of coronary heart disease (CHD). We investigated whether long-term changes in plasma L-carnitine over 10 years were associated with the CHD incidence and also examined joint associations of carnitine-rich red meat consumption and L-carnitine changes on the subsequent risk of CHD. METHODS This prospective nested case-control study included 772 healthy women at baseline (386 incident CHD cases and 386 healthy controls). Plasma L-carnitine levels were measured both at the first (1989-90) and second blood collections (2000-02). Incident cases of CHD were prospectively followed from the date of the second blood collection through 2016. RESULTS Overall, a greater increase in L-carnitine from the first to the second time point was related to a higher risk of CHD, regardless of the initial L-carnitine levels (relative risk: 1.36 (95% CI 0.999, 1.84) per 1-SD increase). The 10-year changes in L-carnitine were positively associated with red meat consumption over time, and women with higher red meat intake (≥ 36 g/day) and with greater increases in L-carnitine had a 1.86 (95% CI 1.13, 3.09) times increased risk of CHD, as compared to those with lower red meat intake and lesser increases in L-carnitine. CONCLUSION Long-term increases in L-carnitine levels were associated with the subsequent incidence of CHD, especially among women with higher intake of red meat. Our results suggest the importance of atherogenic L-carnitine changes and dietary intakes over time in the prevention of CHD.
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14
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Spirulina platensis alleviates high fat diet-induced cognitive impairment in mice via the gut-brain axis. J Funct Foods 2021. [DOI: 10.1016/j.jff.2021.104706] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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15
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Gao X, Zhang H, Li K, Shi Y, Guo X, Wang L, Li D. Sandalwood seed oil improves insulin sensitivity in high-fat/high-sucrose diet-fed rats associated with altered intestinal microbiota and its metabolites. Food Funct 2021; 12:9739-9749. [PMID: 34664591 DOI: 10.1039/d1fo02239c] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Sandalwood seed oil (SSO), rich in ximenynic acid, is extracted from the seed kernels of Santalum spicatum. The current work aimed to clarify the potential mechanisms of SSO in preventing insulin resistance (IR) by investigating the intestinal microbiota and its metabolites. Fifty male Sprague-Dawley rats were randomly divided into a standard chow group (N), and four high-fat/high-sucrose (HFHS) diet-fed groups plus 7% of SSO, fish oil (FO), linseed oil (LO) or sunflower oil (SO), respectively. After 12 weeks, the feces were collected and subsequently the rats were sacrificed for collecting blood and tissues. The results indicated that the SSO, FO and LO groups had a lower ratio of Firmicutes to Bacteroidetes (F/B) and lower levels of Actinobacteria phylum in their feces compared to the SO group. HOMA-IR was positively correlated with F/B (r = 0.63) and Actinobacteria (r = 0.64). At the genus level, beneficial bacteria, including Oscillospira, Clostridium, Turicibacter, Ruminococcus and Coprococcus, were more abundant, while destructive bacteria, such as Collinsella, were less abundant in the SSO group than in the SO group. The concentrations of fecal short-chain fatty acids (SCFAs) were higher, and the serum LPS and trimethylamine N-oxide (TMAO) were lower in the SSO, FO and LO groups than the SO group. In addition, SCFAs were negatively (r: -0.45 to -0.82), and LPS (r: 0.12 to 0.42) and TMAO (r: 0.32 to 0.49) were positively correlated with HOMA-IR and serum IL-1β, IL-6 and TNF-α. In summary, the prevention effect of SSO on HFHS induced IR was associated with altered intestinal microbiota composition and the production of microbial metabolites.
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Affiliation(s)
- Xiang Gao
- Institute of Nutrition & Health, College of Public Health, Qingdao University, Qingdao, China. .,College of Life Sciences, Qingdao University, Qingdao, China
| | - Huijun Zhang
- Institute of Nutrition & Health, College of Public Health, Qingdao University, Qingdao, China.
| | - Kelei Li
- Institute of Nutrition & Health, College of Public Health, Qingdao University, Qingdao, China.
| | - Yan Shi
- Institute of Nutrition & Health, College of Public Health, Qingdao University, Qingdao, China.
| | - Xiaofei Guo
- Institute of Nutrition & Health, College of Public Health, Qingdao University, Qingdao, China.
| | - Ling Wang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Duo Li
- Institute of Nutrition & Health, College of Public Health, Qingdao University, Qingdao, China.
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16
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4-Hydroxyderricin Promotes Apoptosis and Cell Cycle Arrest through Regulating PI3K/AKT/mTOR Pathway in Hepatocellular Cells. Foods 2021; 10:foods10092036. [PMID: 34574146 PMCID: PMC8468691 DOI: 10.3390/foods10092036] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/19/2021] [Accepted: 08/24/2021] [Indexed: 01/08/2023] Open
Abstract
4-hydroxyderricin (4-HD), as a natural flavonoid compound derived from Angelica keiskei, has largely unknown inhibition and mechanisms on liver cancer. Herein, we investigated the inhibitory effects of 4-HD on hepatocellular carcinoma (HCC) cells and clarified the potential mechanisms by exploring apoptosis and cell cycle arrest mediated via the PI3K/AKT/mTOR signaling pathway. Our results show that 4-HD treatment dramatically decreased the survival rate and activities of HepG2 and Huh7 cells. The protein expressions of apoptosis-related genes significantly increased, while those related to the cell cycle were decreased by 4-HD. 4-HD also down-regulated PI3K, p-PI3K, p-AKT, and p-mTOR protein expression. Moreover, PI3K inhibitor (LY294002) enhanced the promoting effect of 4-HD on apoptosis and cell cycle arrest in HCC cells. Consequently, we demonstrate that 4-HD can suppress the proliferation of HCC cells by promoting the PI3K/AKT/mTOR signaling pathway mediated apoptosis and cell cycle arrest.
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17
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Negro M, Cerullo G, Parimbelli M, Ravazzani A, Feletti F, Berardinelli A, Cena H, D'Antona G. Exercise, Nutrition, and Supplements in the Muscle Carnitine Palmitoyl-Transferase II Deficiency: New Theoretical Bases for Potential Applications. Front Physiol 2021; 12:704290. [PMID: 34408664 PMCID: PMC8365340 DOI: 10.3389/fphys.2021.704290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 07/05/2021] [Indexed: 02/06/2023] Open
Abstract
Carnitine palmitoyltransferase II (CPTII) deficiency is the most frequent inherited disorder regarding muscle fatty acid metabolism, resulting in a reduced mitochondrial long-chain fatty acid oxidation during endurance exercise. This condition leads to a clinical syndrome characterized by muscle fatigue and/or muscle pain with a variable annual frequency of severe rhabdomyolytic episodes. While since the CPTII deficiency discovery remarkable scientific advancements have been reached in genetic analysis, pathophysiology and diagnoses, the same cannot be said for the methods of treatments. The current recommendations remain those of following a carbohydrates-rich diet with a limited fats intake and reducing, even excluding, physical activity, without, however, taking into account the long-term consequences of this approach. Suggestions to use carnitine and medium chain triglycerides remain controversial; conversely, other potential dietary supplements able to sustain muscle metabolism and recovery from exercise have never been taken into consideration. The aim of this review is to clarify biochemical mechanisms related to nutrition and physiological aspects of muscle metabolism related to exercise in order to propose new theoretical bases of treatment which, if properly tested and validated by future trials, could be applied to improve the quality of life of these patients.
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Affiliation(s)
- Massimo Negro
- Centro di Ricerca Interdipartimentale nelle Attivitá Motorie e Sportive (CRIAMS) - Sport Medicine Centre, University of Pavia, Voghera, Italy
| | - Giuseppe Cerullo
- Department of Movement Sciences and Wellbeing, University of Naples Parthenope, Naples, Italy
| | - Mauro Parimbelli
- Centro di Ricerca Interdipartimentale nelle Attivitá Motorie e Sportive (CRIAMS) - Sport Medicine Centre, University of Pavia, Voghera, Italy
| | - Alberto Ravazzani
- Centro di Ricerca Interdipartimentale nelle Attivitá Motorie e Sportive (CRIAMS) - Sport Medicine Centre, University of Pavia, Voghera, Italy
| | - Fausto Feletti
- Department of Internal Medicine, University of Pavia, Pavia, Italy
| | | | - Hellas Cena
- Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Pavia, Italy.,Clinical Nutrition and Dietetics Service, Unit of Internal Medicine and Endocrinology, ICS Maugeri IRCCS, University of Pavia, Pavia, Italy
| | - Giuseppe D'Antona
- Centro di Ricerca Interdipartimentale nelle Attivitá Motorie e Sportive (CRIAMS) - Sport Medicine Centre, University of Pavia, Voghera, Italy.,Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Pavia, Italy
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18
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Bruzzone C, Gil-Redondo R, Seco M, Barragán R, de la Cruz L, Cannet C, Schäfer H, Fang F, Diercks T, Bizkarguenaga M, González-Valle B, Laín A, Sanz-Parra A, Coltell O, de Letona AL, Spraul M, Lu SC, Buguianesi E, Embade N, Anstee QM, Corella D, Mato JM, Millet O. A molecular signature for the metabolic syndrome by urine metabolomics. Cardiovasc Diabetol 2021; 20:155. [PMID: 34320987 PMCID: PMC8320177 DOI: 10.1186/s12933-021-01349-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Accepted: 07/19/2021] [Indexed: 12/12/2022] Open
Abstract
Background Metabolic syndrome (MetS) is a multimorbid long-term condition without consensual medical definition and a diagnostic based on compatible symptomatology. Here we have investigated the molecular signature of MetS in urine. Methods We used NMR-based metabolomics to investigate a European cohort including urine samples from 11,754 individuals (18–75 years old, 41% females), designed to populate all the intermediate conditions in MetS, from subjects without any risk factor up to individuals with developed MetS (4–5%, depending on the definition). A set of quantified metabolites were integrated from the urine spectra to obtain metabolic models (one for each definition), to discriminate between individuals with MetS. Results MetS progression produces a continuous and monotonic variation of the urine metabolome, characterized by up- or down-regulation of the pertinent metabolites (17 in total, including glucose, lipids, aromatic amino acids, salicyluric acid, maltitol, trimethylamine N-oxide, and p-cresol sulfate) with some of the metabolites associated to MetS for the first time. This metabolic signature, based solely on information extracted from the urine spectrum, adds a molecular dimension to MetS definition and it was used to generate models that can identify subjects with MetS (AUROC values between 0.83 and 0.87). This signature is particularly suitable to add meaning to the conditions that are in the interface between healthy subjects and MetS patients. Aging and non-alcoholic fatty liver disease are also risk factors that may enhance MetS probability, but they do not directly interfere with the metabolic discrimination of the syndrome. Conclusions Urine metabolomics, studied by NMR spectroscopy, unravelled a set of metabolites that concomitantly evolve with MetS progression, that were used to derive and validate a molecular definition of MetS and to discriminate the conditions that are in the interface between healthy individuals and the metabolic syndrome. Supplementary Information The online version contains supplementary material available at 10.1186/s12933-021-01349-9.
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Affiliation(s)
- Chiara Bruzzone
- Precision Medicine and Metabolism Laboratory, CIC bioGUNE, BRTA, CIBERehd, Bizkaia Technology Park, Bld. 800, 48160, Derio, Bizkaia, Spain
| | - Rubén Gil-Redondo
- Precision Medicine and Metabolism Laboratory, CIC bioGUNE, BRTA, CIBERehd, Bizkaia Technology Park, Bld. 800, 48160, Derio, Bizkaia, Spain
| | - Marisa Seco
- OSARTEN Kooperativa Elkartea, 20500, Arrasate-Mondragón, Spain
| | - Rocío Barragán
- Department of Preventive Medicine and Public Health, School of Medicine, University of Valencia, 46010, Valencia, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición, Madrid, Spain
| | - Laura de la Cruz
- Precision Medicine and Metabolism Laboratory, CIC bioGUNE, BRTA, CIBERehd, Bizkaia Technology Park, Bld. 800, 48160, Derio, Bizkaia, Spain
| | - Claire Cannet
- Bruker Biospin GmbH, Silberstreifen, 76287, Rheinstetten, Germany
| | - Hartmut Schäfer
- Bruker Biospin GmbH, Silberstreifen, 76287, Rheinstetten, Germany
| | - Fang Fang
- Bruker Biospin GmbH, Silberstreifen, 76287, Rheinstetten, Germany
| | - Tammo Diercks
- Precision Medicine and Metabolism Laboratory, CIC bioGUNE, BRTA, CIBERehd, Bizkaia Technology Park, Bld. 800, 48160, Derio, Bizkaia, Spain
| | - Maider Bizkarguenaga
- Precision Medicine and Metabolism Laboratory, CIC bioGUNE, BRTA, CIBERehd, Bizkaia Technology Park, Bld. 800, 48160, Derio, Bizkaia, Spain
| | - Beatriz González-Valle
- Precision Medicine and Metabolism Laboratory, CIC bioGUNE, BRTA, CIBERehd, Bizkaia Technology Park, Bld. 800, 48160, Derio, Bizkaia, Spain
| | - Ana Laín
- Precision Medicine and Metabolism Laboratory, CIC bioGUNE, BRTA, CIBERehd, Bizkaia Technology Park, Bld. 800, 48160, Derio, Bizkaia, Spain
| | - Arantza Sanz-Parra
- Precision Medicine and Metabolism Laboratory, CIC bioGUNE, BRTA, CIBERehd, Bizkaia Technology Park, Bld. 800, 48160, Derio, Bizkaia, Spain
| | - Oscar Coltell
- CIBER Fisiopatología de la Obesidad y Nutrición, Madrid, Spain.,Department of Computer Languages and Systems, Universitat Jaume I, 12071, Castellón, Spain
| | | | - Manfred Spraul
- Bruker Biospin GmbH, Silberstreifen, 76287, Rheinstetten, Germany
| | - Shelly C Lu
- Karsh Division of Gastroenterology and Hepatology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | | | - Nieves Embade
- Precision Medicine and Metabolism Laboratory, CIC bioGUNE, BRTA, CIBERehd, Bizkaia Technology Park, Bld. 800, 48160, Derio, Bizkaia, Spain
| | - Quentin M Anstee
- Translational & Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK.,Newcastle NIHR Biomedical Research Centre, Newcastle Upon Tyne Hospitals NHS Trust, Newcastle upon Tyne, UK
| | - Dolores Corella
- Department of Preventive Medicine and Public Health, School of Medicine, University of Valencia, 46010, Valencia, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición, Madrid, Spain
| | - José M Mato
- Precision Medicine and Metabolism Laboratory, CIC bioGUNE, BRTA, CIBERehd, Bizkaia Technology Park, Bld. 800, 48160, Derio, Bizkaia, Spain
| | - Oscar Millet
- Precision Medicine and Metabolism Laboratory, CIC bioGUNE, BRTA, CIBERehd, Bizkaia Technology Park, Bld. 800, 48160, Derio, Bizkaia, Spain.
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19
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Zhang M, Qu Y, Li D, Liu X, Niu Y, Xu Y. To Love and to Kill: Accurate and Selective Colorimetry for Both Chloride and Mercury Ions Regulated by Electro-Synthesized Oxidase-like SnTe Nanobelts. Anal Chem 2021; 93:10132-10140. [PMID: 34255490 DOI: 10.1021/acs.analchem.1c01017] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Herein, SnTe nanobelts (NBs) with efficient oxidase-mimetic activity were synthesized by the simple electrochemical exfoliation method. A specific inhibition effect of Cl- on the enzymatic behavior of the pure SnTe NBs was discovered, which was accordingly used for establishing a highly feasible, sensitive, selective, and stable Cl- colorimetric assay. The detection concentration range was 50 nM to 1 mM, and the lowest detection limit was 20 nM for Cl-. In addition, a signal on-off-on route based on the SnTe NB nanozyme was designed to realize the reliable and specific detection of Hg2+. Therein, the SnTe NBs were grafted with gold nanoparticles to form a hybrid of SnTe/Au, resulting in the depression of the oxidase-like activity, which can then be recovered in the presence of the Hg2+ due to the formation of a gold amalgam. Especially, it was found that the high concentration of Cl- over 3 mM could again exert suppression influence toward the enzymatic activity of the SnTe/Au-Hg system. Based on the to-love-and-to-kill interaction between Cl- and Hg2+, the detection range for Cl- can be extended to 40 to 250 mM. In return, the assays of Cl- could avoid in advance its interference toward the accurate Hg2+ assays. We systematically clarified the oxidase-like catalytic mechanism of the SnTe-derived nanozyme systems. The as-proposed colorimetry can be successfully applied in practical samples including the sweat, human serum, or seawater/tap water, relating to cystic fibrosis, hyper-/hypochloremia, or environmental control, respectively.
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Affiliation(s)
- Meng Zhang
- Institute of Biomedical Engineering, College of Life Science, Qingdao University, Qingdao 266071, China
| | - Yue Qu
- Institute of Biomedical Engineering, College of Life Science, Qingdao University, Qingdao 266071, China
| | - Danxia Li
- Department of Urology, Key Laboratory of Urinary System Diseases, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - Xiangyong Liu
- Institute of Biomedical Engineering, College of Life Science, Qingdao University, Qingdao 266071, China
| | - Yusheng Niu
- Institute of Biomedical Engineering, College of Life Science, Qingdao University, Qingdao 266071, China
| | - Yuanhong Xu
- Institute of Biomedical Engineering, College of Life Science, Qingdao University, Qingdao 266071, China.,Department of Urology, Key Laboratory of Urinary System Diseases, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
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20
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Arrona Cardoza P, Spillane MB, Morales Marroquin E. Alzheimer's disease and gut microbiota: does trimethylamine N-oxide (TMAO) play a role? Nutr Rev 2021; 80:271-281. [PMID: 33942080 DOI: 10.1093/nutrit/nuab022] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Alzheimer's disease (AD) is a neurodegenerative disease that affects memory and cognitive function. Clinical evidence has put into question our current understanding of AD development, propelling researchers to look into further avenues. Gut microbiota has emerged as a potential player in AD pathophysiology. Lifestyle factors, such as diet, can have negative effects on the gut microbiota and thus host health. A Western-type diet has been highlighted as a risk factor for both gut microbiota alteration as well as AD development. The gut-derived trimethylamine N-oxide (TMAO) has been previously implied in the development of cardiovascular diseases with recent evidence suggesting a plausible role of TMAO in AD development. Therefore, the main goal of the present review is to provide the reader with potential mechanisms of action through which consumption of a Western-type diet could increase AD risk, by acting through microbiota-produced TMAO. Although a link between TMAO and AD is far from definitive, this review will serve as a call for research into this new area of research.
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Affiliation(s)
- Pablo Arrona Cardoza
- P. Arrona Cardoza is with the Tecnológico de Monterrey, School of Medicine and Health Science, Monterrey, Nuevo Leon, Mexico. M.B Spillane is with the H.C. Drew School of Health and Human Performance, McNeese State University, Lake Charles, Louisiana, USA. E. Morales Marroquin is with the School of Public Health, University of Texas Health Science Center at Houston, Houston, Texas, USA. E. Morales Marroquin is with the Center for Pediatric Population Health, UTHealth School of Public Health and Children's Health System of Texas, Dallas, Texas, USA
| | - Micheil B Spillane
- P. Arrona Cardoza is with the Tecnológico de Monterrey, School of Medicine and Health Science, Monterrey, Nuevo Leon, Mexico. M.B Spillane is with the H.C. Drew School of Health and Human Performance, McNeese State University, Lake Charles, Louisiana, USA. E. Morales Marroquin is with the School of Public Health, University of Texas Health Science Center at Houston, Houston, Texas, USA. E. Morales Marroquin is with the Center for Pediatric Population Health, UTHealth School of Public Health and Children's Health System of Texas, Dallas, Texas, USA
| | - Elisa Morales Marroquin
- P. Arrona Cardoza is with the Tecnológico de Monterrey, School of Medicine and Health Science, Monterrey, Nuevo Leon, Mexico. M.B Spillane is with the H.C. Drew School of Health and Human Performance, McNeese State University, Lake Charles, Louisiana, USA. E. Morales Marroquin is with the School of Public Health, University of Texas Health Science Center at Houston, Houston, Texas, USA. E. Morales Marroquin is with the Center for Pediatric Population Health, UTHealth School of Public Health and Children's Health System of Texas, Dallas, Texas, USA
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21
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Gao X, Sun G, Randell E, Tian Y, Zhou H. Systematic investigation of the relationships of trimethylamine N-oxide and L-carnitine with obesity in both humans and rodents. Food Funct 2021; 11:7707-7716. [PMID: 32915186 DOI: 10.1039/d0fo01743d] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Previous studies suggested the potential associations of trimethylamine N-oxide (TMAO) and its metabolic precursor l-carnitine with obesity. However, existing evidence is limited and inconsistent. In the present study, we perform a cross-sectional analysis of the associations of serum levels of TMAO and l-carnitine with obesity measures, including BMI, body fat distribution and body composition in 1081 participants from the general Newfoundland population. The dietary effects of TMAO and l-carnitine in preventing high fat diet-induced obesity in both male and female mice were also evaluated. We found significant associations between higher serum l-carnitine levels and obesity (higher BMI, body fat mass and VT%) in women, but not in men after controlling multiple confounding factors. Serum TMAO levels were positively associated with age, but not obesity in both men and women. Dietary TMAO had no influence on fat accumulation in high fat diet-fed mice. However, l-carnitine supplementation prevented high fat diet-fed induced obesity in both male and female mice by up-regulating lipolysis and down-regulating lipogenesis in white adipose tissues. The present study provides further evidence for the relationships between TMAO, l-carnitine and obesity.
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Affiliation(s)
- Xiang Gao
- College of Life Sciences, Qingdao University, No. 308 Ningxia Road, Qingdao 266071, Shandong, China.
| | - Guang Sun
- Faculty of Medicine, Memorial University, 300 Prince Philip Drive, St John's A1B3V6, NL, Canada.
| | - Edward Randell
- Faculty of Medicine, Memorial University, 300 Prince Philip Drive, St John's A1B3V6, NL, Canada.
| | - Yuan Tian
- Faculty of Medicine, Memorial University, 300 Prince Philip Drive, St John's A1B3V6, NL, Canada.
| | - Haicheng Zhou
- Faculty of Medicine, Memorial University, 300 Prince Philip Drive, St John's A1B3V6, NL, Canada.
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22
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Croci S, D’Apolito LI, Gasperi V, Catani MV, Savini I. Dietary Strategies for Management of Metabolic Syndrome: Role of Gut Microbiota Metabolites. Nutrients 2021; 13:nu13051389. [PMID: 33919016 PMCID: PMC8142993 DOI: 10.3390/nu13051389] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 04/15/2021] [Accepted: 04/16/2021] [Indexed: 12/21/2022] Open
Abstract
Metabolic syndrome (MetS) is a complex pathophysiological state with incidence similar to that of a global epidemic and represents a risk factor for the onset of chronic non-communicable degenerative diseases (NCDDs), including cardiovascular disease (CVD), type 2 diabetes mellitus, chronic kidney disease, and some types of cancer. A plethora of literature data suggest the potential role of gut microbiota in interfering with the host metabolism, thus influencing several MetS risk factors. Perturbation of the gut microbiota’s composition and activity, a condition known as dysbiosis, is involved in the etiopathogenesis of multiple chronic diseases. Recent studies have shown that some micro-organism-derived metabolites (including trimethylamine N-oxide (TMAO), lipopolysaccharide (LPS) of Gram-negative bacteria, indoxyl sulfate and p-cresol sulfate) induce subclinical inflammatory processes involved in MetS. Gut microbiota’s taxonomic species or abundance are modified by many factors, including diet, lifestyle and medications. The main purpose of this review is to highlight the correlation between different dietary strategies and changes in gut microbiota metabolites. We mainly focus on the validity/inadequacy of specific dietary patterns to reduce inflammatory processes, including leaky gut and subsequent endotoxemia. We also describe the chance of probiotic supplementation to interact with the immune system and limit negative consequences associated with MetS.
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Affiliation(s)
| | | | - Valeria Gasperi
- Correspondence: (V.G.); (M.V.C.); Tel.: +39-06-72596465 (V.G. & M.V.C.)
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23
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Hassannejad R, Moosavian SP, Mohammadifard N, Mansourian M, Roohafza H, Sadeghi M, Sarrafzadegan N. Long-term association of red meat consumption and lipid profile: A 13-year prospective population-based cohort study. Nutrition 2021; 86:111144. [PMID: 33592495 DOI: 10.1016/j.nut.2021.111144] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 12/11/2020] [Accepted: 12/30/2020] [Indexed: 11/24/2022]
Abstract
OBJECTIVES The long-term associations between red meat consumption and lipid profile are not completely known. This longitudinal study assessed the association of red meat consumption with lipid profile in healthy Iranian adults using repeated measurements of red meat intake. METHODS The population-based longitudinal study was conducted within the framework of the Isfahan Cohort Study on a subsample of 1376 healthy adults, aged ≥35 y, for whom complete information was available in all three phases of the study. A simplified qualitative 48-item food frequency questionnaire, blood pressure, anthropometric measurements, and fasting serum lipids and blood sugar were evaluated in three phases. Mixed-effects linear regression was applied to examine the longitudinal associations between red meat consumption and lipid profile. RESULTS After adjustment for potential confounders, each single-serving increase in red meat and organ meat consumption was significantly associated with an increment in triacylglycerol (β = 6.30; 95% confidence interval [CI], 3.97-8.63), total cholesterol (β = 3.03; 95% CI, 2.02-4.04), low-density lipoprotein (β = 3.40; 95% CI, 2.64-4.17), high-density lipoprotein (β = 0.60; 95% CI, 0.28-0.93), ratio of low-density to high-density lipoprotein (β = 0.03; 95% CI, 0.01-0.05), and non-high-density lipoprotein (β = 2.42; 95% CI, 1.41-3.43). However, processed meat consumption had no significant association with lipid profile. CONCLUSIONS Total red meat intake had a significant, direct association with lipid profile after a 13-year follow-up period in a cohort of the healthy Iranian population.
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Affiliation(s)
- Razieh Hassannejad
- Isfahan Cardiovascular Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Seyedeh Parisa Moosavian
- Department of Clinical Nutrition, School of Nutrition and Food Science, Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Noushin Mohammadifard
- Isfahan Cardiovascular Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Marjan Mansourian
- Epidemiology and Biostatistics Department, Health School, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Hamidreza Roohafza
- Cardiac Rehabilitation Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Masoumeh Sadeghi
- Cardiac Rehabilitation Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Nizal Sarrafzadegan
- Isfahan Cardiovascular Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
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24
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Gao X, Du L, Randell E, Zhang H, Li K, Li D. Effect of different phosphatidylcholines on high fat diet-induced insulin resistance in mice. Food Funct 2021; 12:1516-1528. [DOI: 10.1039/d0fo02632h] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In this study, we systematically investigated the effect of different phosphatidylcholines on high fat diet-induced insulin resistance in mice.
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Affiliation(s)
- Xiang Gao
- College of Life Sciences
- Qingdao University
- Qingdao 266071
- China
- Institute of Nutrition & Health
| | - Lei Du
- Department of Nutrition and Food Hygiene
- School of Public Health
- Cheeloo College of Medicine
- Shandong University
- No. 44 Wenhuaxi Road, Jinan
| | - Edward Randell
- Faculty of Medicine
- Memorial University
- 300 Prince Philip Drive
- St. John’s A1B3V6
- Canada
| | - Huijun Zhang
- Institute of Nutrition & Health
- College of Public Health
- Qingdao University
- No. 308 Ningxia Road
- China
| | - Kelei Li
- Institute of Nutrition & Health
- College of Public Health
- Qingdao University
- No. 308 Ningxia Road
- China
| | - Duo Li
- Institute of Nutrition & Health
- College of Public Health
- Qingdao University
- No. 308 Ningxia Road
- China
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25
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Andraos S, Jones B, Lange K, Clifford SA, Thorstensen EB, Kerr JA, Wake M, Saffery R, Burgner DP, O'Sullivan JM. Trimethylamine N-oxide (TMAO) Is not Associated with Cardiometabolic Phenotypes and Inflammatory Markers in Children and Adults. Curr Dev Nutr 2021; 5:nzaa179. [PMID: 33501405 PMCID: PMC7813154 DOI: 10.1093/cdn/nzaa179] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 12/04/2020] [Accepted: 12/07/2020] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Trimethylamine N-oxide (TMAO) is a diet- and microbiome-derived metabolite and a proposed biomarker of adverse cardiometabolic outcomes. TMAO studies have mainly been conducted in individuals with cardiometabolic disease, and studies in population-derived samples are limited. OBJECTIVE We aimed to investigate the associations between plasma TMAO concentrations and its precursors [carnitine, choline, betaine, and dimethylglycine (DMG)] with metabolic syndrome (MetS) scores, preclinical cardiovascular phenotypes, and inflammatory biomarkers (i.e. high-sensitivity C-reactive protein and serum glycoprotein acetyls) in a population-derived cohort of children and their parents. METHODS The concentrations of TMAO and its precursors were quantified using UHPLC coupled with tandem MS (UHPLC/MS-MS) in 1166 children (mean age 11 y ± 0.5 y, 51% female) and 1324 adults (44 y ± 5.1 y, 87% female) participating in The Growing Up in Australia's Child Health CheckPoint Study. We developed multivariable fractional polynomial models to analyze associations between TMAO, its precursors, MetS (adjusted for sex and age), and cardiovascular phenotypes (adjusted for sex, age, BMI, household income, and the urinary albumin to creatinine ratio). Pearson's correlations were computed to identify associations between TMAO, its precursors, and inflammatory biomarkers. RESULTS The concentrations of TMAO precursors, but not TMAO itself, were associated with MetS, cardiovascular phenotypes, and inflammatory biomarkers in children and adults. CONCLUSIONS TMAO precursors, but not TMAO itself, were associated with adverse cardiometabolic and inflammatory phenotypes in children and adults. TMAO precursor concentrations may better reflect cardiovascular health and inflammatory status within the wider population. Replication in other population settings and mechanistic studies are warranted.
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Affiliation(s)
- Stephanie Andraos
- Liggins Institute, The University of Auckland, Auckland, New Zealand
| | - Beatrix Jones
- Department of Statistics, Faculty of Science, The University of Auckland, Auckland, New Zealand
| | - Katherine Lange
- The Murdoch Children's Research Institute, Parkville, Victoria, Australia
- Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia
| | - Susan A Clifford
- The Murdoch Children's Research Institute, Parkville, Victoria, Australia
- Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia
| | | | - Jessica A Kerr
- The Murdoch Children's Research Institute, Parkville, Victoria, Australia
- Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia
| | - Melissa Wake
- The Murdoch Children's Research Institute, Parkville, Victoria, Australia
- Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia
| | - Richard Saffery
- The Murdoch Children's Research Institute, Parkville, Victoria, Australia
- Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia
| | - David P Burgner
- The Murdoch Children's Research Institute, Parkville, Victoria, Australia
- Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia
- Department of Paediatrics, Monash University, Clayton, Victoria, Australia
| | - Justin M O'Sullivan
- Liggins Institute, The University of Auckland, Auckland, New Zealand
- MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, United Kingdom
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26
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Abbasalizad Farhangi M, Vajdi M. Gut microbiota–associated trimethylamine N-oxide and increased cardiometabolic risk in adults: a systematic review and dose-response meta-analysis. Nutr Rev 2020; 79:1022-1042. [DOI: 10.1093/nutrit/nuaa111] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Abstract
Context
Several studies suggest a relationship between trimethylamine N-oxide (TMAO) concentrations and increased cardiometabolic risk, but findings are controversial.
Objective
The aim of this systematic review and meta-analysis was to summarize evidence of the relationship between circulating TMAO levels and risk of hypertension and increased serum lipids in a dose-response and 2-class meta-analysis of discrete and continuous variables.
Data Sources
PubMed, Scopus, Cochrane, and ProQuest databases were searched.
Study Selection
Observational studies that reported disease status of participants (≥ 18 years), type of sample in which TMAO was measured (serum or plasma), and results based on at least 2 categories of TMAO concentrations, including relative risks, hazard ratios, or odds ratios with 95%CIs for cardiometabolic risk factors in association with circulating TMAO levels were selected. Papers were reviewed independently by both authors. The Newcastle-Ottawa Scale was used to assess the quality of included studies.
Data Extraction
The following data were extracted: first author’s name, publication year, study design, study location, demographic information of participants, and concentrations of circulating TMAO.
Results
Eighteen studies were included in the meta-analysis. There was a dose-response relationship between circulating TMAO and increased odds of hypertension in cohort studies (P for nonlinearity = 0.049), in plasma-derived TMAO samples (P for nonlinearity = 0.043), in patients with cardiovascular disease (P for nonlinearity = 0.048), and in apparently healthy individuals from community-based studies (P for nonlinearity = 0.005). Moreover, the highest category of TMAO concentrations was associated with a 2.36 mmHg increase in systolic blood pressure when compared with the lowest category. The dose-response meta-analysis of continuous variables revealed that an increase in TMAO is associated with reduced high-density lipoprotein cholesterol in apparently healthy individuals and reduced high-density lipoprotein cholesterol and increased total cholesterol in patients with cardiovascular disease.
Conclusions
Circulating TMAO is positively associated with an increased risk of hypertension and other cardiometabolic disorders in adults.
Systematic Review Registration
PROSPERO identification number CRD42019138296.
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Affiliation(s)
| | - Mahdi Vajdi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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27
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Diotallevi C, Fava F, Gobbetti M, Tuohy K. Healthy dietary patterns to reduce obesity-related metabolic disease: polyphenol-microbiome interactions unifying health effects across geography. Curr Opin Clin Nutr Metab Care 2020; 23:437-444. [PMID: 32941185 DOI: 10.1097/mco.0000000000000697] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
PURPOSE OF REVIEW The spread of the Western lifestyle across the globe has led to a pandemic in obesity-related metabolic disease. The Mediterranean diet (MedDiet), Okinawa diet (OkD) and Nordic diet, derived from very different regions of the world and culinary traditions, have a large whole plant food component and are associated with reduced disease risk. This review focuses on polyphenol : microbiome interactions as one possible common mechanistic driver linking the protective effects whole plant foods against metabolic disease across healthy dietary patterns irrespective of geography. RECENT FINDINGS Although mechanistic evidence in humans is still scarce, animal studies suggest that polyphenol or polyphenol rich foods induce changes within the gut microbiota and its metabolic output of trimethylamine N-oxide, short-chain fatty acids, bile acids and small phenolic acids. These cross-kingdom signaling molecules regulate mammalian lipid and glucose homeostasis, inflammation and energy storage or thermogenesis, physiological processes determining obesity-related metabolic and cardiovascular disease risk. However, it appears that where in the intestine metabolites are produced, the microbiota communities involved, and interactions between the metabolites themselves, can all influence physiological responses, highlighting the need for a greater understanding of the kinetics and site of production of microbial metabolites within the gut. SUMMARY Interactions between polyphenols and metabolites produced by the gut microbiota are emerging as a possible unifying protective mechanism underpinning diverse healthy dietary patterns signaling across culinary traditions, across geography and across domains of life.
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Affiliation(s)
- Camilla Diotallevi
- Faculty of Science and Technology, Freie Universität Bozen-Libera Università di Bolzano, Bolzano
- Department of Food Quality and Nutrition, Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Trento, Italy
| | - Francesca Fava
- Department of Food Quality and Nutrition, Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Trento, Italy
| | - Marco Gobbetti
- Faculty of Science and Technology, Freie Universität Bozen-Libera Università di Bolzano, Bolzano
| | - Kieran Tuohy
- Department of Food Quality and Nutrition, Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Trento, Italy
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28
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Farhangi MA, Vajdi M, Asghari-Jafarabadi M. Gut microbiota-associated metabolite trimethylamine N-Oxide and the risk of stroke: a systematic review and dose-response meta-analysis. Nutr J 2020; 19:76. [PMID: 32731904 PMCID: PMC7393891 DOI: 10.1186/s12937-020-00592-2] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 07/21/2020] [Indexed: 02/06/2023] Open
Abstract
AIMS Several epidemiological studies have examined the association between trimethylamine N-Oxide (TMAO) and stroke risk; however, the results are still inconclusive. The purpose of this meta-analysis was to evaluate the relationship between TMAO concentrations and stroke risk. METHODS PubMed, Scopus, Cochrane and ProQuest search engines were systematically searched up to 18 June 2019. All of the studies that evaluated the relationship between TMAO and stroke were included in the systematic review and eligible studies were included into the meta-analysis. Meta-regression and subgroup analysis were also employed to find the source of heterogeneity. RESULTS Eight studies (two cross-sectional studies, two cohort studies, three case-control studies and one nested case-control study) with a total of 6150 participants were included in the meta-analysis. The overall result showed that being in the highest category of TMAO increased the odds of stroke by 68% (OR: 1.675; CI: 0.866-3.243; P = 0.047) and mean TMAO concentrations was 2.201 μmol/L higher in patients with stroke rather than non-stroke controls (weighted mean difference (WMD): 2.20; CI: 1.213-3.188; P < 0.001). Furthermore, we observed revealed a non-linear association between increased TMAO levels and increased odds of stroke (P- for nonlinearity < 0.001). In addition, visual inspection of the funnel plot revealed a significant asymmetry among studies examining the differences in TMAO in patients with stroke versus control group. CONCLUSION This is the first meta-analysis to show positive dose-dependent relations between circulating TMAO concentration and stroke risk. However, further interventional studies and long-term studies are needed to better explain causality.
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Affiliation(s)
- Mahdieh Abbasalizad Farhangi
- Research Center for Evidence Based Medicine, Health Management and Safety Promotion Research Institute, Tabriz University of Medical Sciences, Attar Neyshabouri, Daneshgah Blv, Tabriz, Iran.
| | - Mahdi Vajdi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Asghari-Jafarabadi
- Road Traffic Injury Research Center, Department of Epidemiology and Biostatistics, Faculty of Health, Tabriz University of Medical Sciences, Tabriz, Iran
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29
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Andraos S, Lange K, Clifford SA, Jones B, Thorstensen EB, Kerr JA, Wake M, Saffery R, Burgner DP, O'Sullivan JM. Plasma Trimethylamine N-Oxide and Its Precursors: Population Epidemiology, Parent-Child Concordance, and Associations with Reported Dietary Intake in 11- to 12-Year-Old Children and Their Parents. Curr Dev Nutr 2020; 4:nzaa103. [PMID: 32666035 PMCID: PMC7335361 DOI: 10.1093/cdn/nzaa103] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 05/18/2020] [Accepted: 06/02/2020] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Trimethylamine N-oxide (TMAO) is a microbiome- and diet-derived metabolite implicated in adverse cardiovascular outcomes. To date, studies of plasma TMAO concentrations have largely focused on individuals with metabolic disease. As such, data on TMAO concentrations in population settings and parent-child dyads are lacking. OBJECTIVES This study aimed to investigate parent-child concordance, age, and sex effects on plasma concentrations of TMAO and its precursors [l-carnitine, choline, betaine, and dimethylglycine (DMG)]. Associations between concentrations of TMAO and its precursors and self-reported dietary intakes of animal protein (i.e., red meat, meat products, chicken, fish, milk products, and cheese) and fast-food meals were also investigated. METHODS A total of 1166 children (mean ± SD age: 11 ± 0.5 y, 51% female) and 1324 parents (mean ± SD age: 44 ± 5.1 y, 87% female) had a biomedical assessment as part of Growing Up in Australia's Child Health Checkpoint. Plasma TMAO and precursor concentrations were quantified using ultra-high-pressure LC coupled with tandem MS. RESULTS Familial dyads significantly contributed to plasma TMAO and precursor concentrations (P < 0.0001), explaining 37% of variance for TMAO concentrations. Least-square mean ± SE plasma TMAO was lower in children (0.79 ± 0.02 µM on the log-scale) than in adults (1.22 ± 0.02 µM). By contrast, children's betaine (40.30 ± 0.34 µM) and DMG concentrations (1.02 ± 0.01 µM on the log-scale) were higher than adults' betaine (37.50 ± 0.32 µM) and DMG concentrations (0.80 ± 0.01 µM) (P < 0.0001). Mean values of all metabolites, except adult TMAO, were higher in males than in females (P < 0.001). Greater reported intake of red meat and fish was associated with higher TMAO concentrations in both children [estimates (95% CIs) for red meat: 0.06 (0.01, 0.10); fish: 0.11 (0.06, 0.17)] and adults [red meat: 0.13 (0.08, 0.17); meat products: 0.07 (0.03, 0.12); and fish: 0.09 (0.04, 0.14)]. CONCLUSIONS Age, sex, and shared family factors, including diet, contribute to variation in plasma concentrations of TMAO and its precursors.
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Affiliation(s)
- Stephanie Andraos
- Liggins Institute, The University of Auckland, Auckland, New Zealand
| | - Katherine Lange
- The Murdoch Children's Research Institute, Parkville, Victoria, Australia
- Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia
| | - Susan A Clifford
- The Murdoch Children's Research Institute, Parkville, Victoria, Australia
- Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia
| | - Beatrix Jones
- Department of Statistics, Faculty of Science, The University of Auckland, Auckland, New Zealand
| | | | - Jessica A Kerr
- The Murdoch Children's Research Institute, Parkville, Victoria, Australia
- Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia
| | - Melissa Wake
- The Murdoch Children's Research Institute, Parkville, Victoria, Australia
- Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia
| | - Richard Saffery
- The Murdoch Children's Research Institute, Parkville, Victoria, Australia
- Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia
| | - David P Burgner
- The Murdoch Children's Research Institute, Parkville, Victoria, Australia
- Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia
- Department of Paediatrics, Monash University, Clayton, Victoria, Australia
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30
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Metabolomic and Lipidomic Signatures of Metabolic Syndrome and its Physiological Components in Adults: A Systematic Review. Sci Rep 2020; 10:669. [PMID: 31959772 PMCID: PMC6971076 DOI: 10.1038/s41598-019-56909-7] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 12/19/2019] [Indexed: 12/20/2022] Open
Abstract
The aim of this work was to conduct a systematic review of human studies on metabolite/lipid biomarkers of metabolic syndrome (MetS) and its components, and provide recommendations for future studies. The search was performed in MEDLINE, EMBASE, EMB Review, CINHAL Complete, PubMed, and on grey literature, for population studies identifying MetS biomarkers from metabolomics/lipidomics. Extracted data included population, design, number of subjects, sex/gender, clinical characteristics and main outcome. Data were collected regarding biological samples, analytical methods, and statistics. Metabolites were compiled by biochemical families including listings of their significant modulations. Finally, results from the different studies were compared. The search yielded 31 eligible studies (2005–2019). A first category of articles identified prevalent and incident MetS biomarkers using mainly targeted metabolomics. Even though the population characteristics were quite homogeneous, results were difficult to compare in terms of modulated metabolites because of the lack of methodological standardization. A second category, focusing on MetS components, allowed comparing more than 300 metabolites, mainly associated with the glycemic component. Finally, this review included also publications studying type 2 diabetes as a whole set of metabolic risks, raising the interest of reporting metabolomics/lipidomics signatures to reflect the metabolic phenotypic spectrum in systems approaches.
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31
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Yuan J, Jiang Q, Song L, Liu Y, Li M, Lin Q, Li Y, Su K, Ma Z, Wang Y, Liu D, Dong J. L-Carnitine Is Involved in Hyperbaric Oxygen-Mediated Therapeutic Effects in High Fat Diet-Induced Lipid Metabolism Dysfunction. Molecules 2020; 25:molecules25010176. [PMID: 31906305 PMCID: PMC6982999 DOI: 10.3390/molecules25010176] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 12/14/2019] [Accepted: 12/25/2019] [Indexed: 11/16/2022] Open
Abstract
Lipid metabolism dysfunction and obesity are serious health issues to human beings. The current study investigated the effects of hyperbaric oxygen (HBO) against high fat diet (HFD)-induced lipid metabolism dysfunction and the roles of L-carnitine. C57/B6 mice were fed with HFD or normal chew diet, with or without HBO treatment. Histopathological methods were used to assess the adipose tissues, serum free fatty acid (FFA) levels were assessed with enzymatic methods, and the endogenous circulation and skeletal muscle L-carnitine levels were assessed with liquid chromatography-tandem mass spectrometry (LC-MS/MS). Additionally, western blotting was used to assess the expression levels of PPARα, CPT1b, pHSL/HSL, and UCP1. HFD treatment increased body/adipose tissue weight, serum FFA levels, circulation L-carnitines and decreased skeletal muscle L-carnitine levels, while HBO treatment alleviated such changes. Moreover, HFD treatment increased fatty acid deposition in adipose tissues and decreased the expression of HSL, while HBO treatment alleviated such changes. Additionally, HFD treatment decreased the expression levels of PPARα and increased those of CPT1b in skeletal muscle, while HBO treatment effectively reverted such changes as well. In brown adipose tissues, HFD increased the expression of UCP1 and the phosphorylation of HSL, which was abolished by HBO treatment as well. In summary, HBO treatment may alleviate HFD-induced fatty acid metabolism dysfunction in C57/B6 mice, which seems to be associated with circulation and skeletal muscle L-carnitine levels and PPARα expression.
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Affiliation(s)
- Junhua Yuan
- Department of Specialty Medicine, School of Basic Medicine, Qingdao University, Qingdao 266071, China; (J.Y.); (L.S.); (Y.L.); (M.L.); (Q.L.)
| | - Qixiao Jiang
- Department of Toxicology, School of Public Health, Qingdao University, Qingdao 266071, China
- Correspondence: (Q.J.); (J.D.); Tel.: +86-18300267138 (Q.J.); +86-0532-83780035 (J.D.)
| | - Limin Song
- Department of Specialty Medicine, School of Basic Medicine, Qingdao University, Qingdao 266071, China; (J.Y.); (L.S.); (Y.L.); (M.L.); (Q.L.)
| | - Yuan Liu
- Department of Specialty Medicine, School of Basic Medicine, Qingdao University, Qingdao 266071, China; (J.Y.); (L.S.); (Y.L.); (M.L.); (Q.L.)
| | - Manwen Li
- Department of Specialty Medicine, School of Basic Medicine, Qingdao University, Qingdao 266071, China; (J.Y.); (L.S.); (Y.L.); (M.L.); (Q.L.)
| | - Qian Lin
- Department of Specialty Medicine, School of Basic Medicine, Qingdao University, Qingdao 266071, China; (J.Y.); (L.S.); (Y.L.); (M.L.); (Q.L.)
| | - Yanrun Li
- Department of Clinical Medicine, Medical Collage, Qingdao University, Qingdao 266071, China; (Y.L.); (K.S.); (Z.M.); (Y.W.); (D.L.)
| | - Kaizhen Su
- Department of Clinical Medicine, Medical Collage, Qingdao University, Qingdao 266071, China; (Y.L.); (K.S.); (Z.M.); (Y.W.); (D.L.)
| | - Zhengye Ma
- Department of Clinical Medicine, Medical Collage, Qingdao University, Qingdao 266071, China; (Y.L.); (K.S.); (Z.M.); (Y.W.); (D.L.)
| | - Yifei Wang
- Department of Clinical Medicine, Medical Collage, Qingdao University, Qingdao 266071, China; (Y.L.); (K.S.); (Z.M.); (Y.W.); (D.L.)
| | - Defeng Liu
- Department of Clinical Medicine, Medical Collage, Qingdao University, Qingdao 266071, China; (Y.L.); (K.S.); (Z.M.); (Y.W.); (D.L.)
| | - Jing Dong
- Department of Specialty Medicine, School of Basic Medicine, Qingdao University, Qingdao 266071, China; (J.Y.); (L.S.); (Y.L.); (M.L.); (Q.L.)
- Department of Physiology, School of Basic Medicine, Qingdao University, Qingdao 266071, China
- Correspondence: (Q.J.); (J.D.); Tel.: +86-18300267138 (Q.J.); +86-0532-83780035 (J.D.)
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Gnoni A, Longo S, Gnoni GV, Giudetti AM. Carnitine in Human Muscle Bioenergetics: Can Carnitine Supplementation Improve Physical Exercise? Molecules 2020; 25:E182. [PMID: 31906370 PMCID: PMC6982879 DOI: 10.3390/molecules25010182] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 12/27/2019] [Accepted: 12/31/2019] [Indexed: 12/18/2022] Open
Abstract
l-Carnitine is an amino acid derivative widely known for its involvement in the transport of long-chain fatty acids into the mitochondrial matrix, where fatty acid oxidation occurs. Moreover, l-Carnitine protects the cell from acyl-CoA accretion through the generation of acylcarnitines. Circulating carnitine is mainly supplied by animal-based food products and to a lesser extent by endogenous biosynthesis in the liver and kidney. Human muscle contains high amounts of carnitine but it depends on the uptake of this compound from the bloodstream, due to muscle inability to synthesize carnitine. Mitochondrial fatty acid oxidation represents an important energy source for muscle metabolism particularly during physical exercise. However, especially during high-intensity exercise, this process seems to be limited by the mitochondrial availability of free l-carnitine. Hence, fatty acid oxidation rapidly declines, increasing exercise intensity from moderate to high. Considering the important role of fatty acids in muscle bioenergetics, and the limiting effect of free carnitine in fatty acid oxidation during endurance exercise, l-carnitine supplementation has been hypothesized to improve exercise performance. So far, the question of the role of l-carnitine supplementation on muscle performance has not definitively been clarified. Differences in exercise intensity, training or conditioning of the subjects, amount of l-carnitine administered, route and timing of administration relative to the exercise led to different experimental results. In this review, we will describe the role of l-carnitine in muscle energetics and the main causes that led to conflicting data on the use of l-carnitine as a supplement.
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Affiliation(s)
- Antonio Gnoni
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari “Aldo Moro”, 70124 Bari, Italy;
| | - Serena Longo
- Department of Biological and Environmental Sciences and Technologies, University of Salento, 73100 Lecce, Italy; (S.L.); (G.V.G.)
| | - Gabriele V. Gnoni
- Department of Biological and Environmental Sciences and Technologies, University of Salento, 73100 Lecce, Italy; (S.L.); (G.V.G.)
| | - Anna M. Giudetti
- Department of Biological and Environmental Sciences and Technologies, University of Salento, 73100 Lecce, Italy; (S.L.); (G.V.G.)
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Abstract
Trimethylamine N-Oxide (TMAO) is the product of the monooxygenation reaction catalyzed by a drug-metabolizing enzyme, human flavin-containing monooxygenase 3 (hFMO3), and its animal orthologues. For several years, researchers have looked at TMAO and hFMO3 as two distinct molecules playing specific but separate roles, the former to defend saltwater animals from osmotic or hydrostatic stress and the latter to process xenobiotics in men. The presence of high levels of plasmatic TMAO in elasmobranchs and other animals was demonstrated a long time ago, whereas the actual physiological role of hFMO3 is still unknown because the enzyme has been mainly characterized for its ability to oxidize drugs. Recently TMAO was found to be related to several human health conditions such as atherosclerosis, cardiovascular, and renal diseases. This correlation poses a striking question of how other vertebrates (and invertebrates) can survive in the presence of very high TMAO concentrations (micromolar in humans, millimolar in marine mammals and several hundred millimolar in elasmobranchs). Therefore, it is important to address how TMAO, its precursors, and FMO catalytic activity are interconnected.
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Eyupoglu ND, Caliskan Guzelce E, Acikgoz A, Uyanik E, Bjørndal B, Berge RK, Svardal A, Yildiz BO. Circulating gut microbiota metabolite trimethylamine N-oxide and oral contraceptive use in polycystic ovary syndrome. Clin Endocrinol (Oxf) 2019; 91:810-815. [PMID: 31556132 DOI: 10.1111/cen.14101] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 09/02/2019] [Accepted: 09/18/2019] [Indexed: 12/21/2022]
Abstract
OBJECTIVES Polycystic ovary syndrome (PCOS) is associated with an increased cardiometabolic risk that might not necessarily translate into adverse cardiovascular outcome later in life. Recently, alterations in gut microbial composition have been reported in the syndrome. Microbiota-dependent metabolite trimethylamine N-oxide (TMAO) and its precursors are closely linked with development of atherosclerotic cardiovascular disease, independently of traditional risk factors. We aimed to assess whether TMAO and its precursors are altered in PCOS and to determine potential impact of treatment on these metabolites. DESIGN Prospective study. PATIENTS Twenty-seven overweight/obese patients with PCOS and 25 age- and BMI-matched healthy control women. MEASUREMENTS At baseline, fasting serum TMAO and its precursors were measured after a 3-day standardized diet. Patients received 3-month OC therapy along with general dietary advice after which all measurements were repeated. RESULTS Patients had higher total testosterone (T) and free androgen index (FAI) whereas whole-body fat mass, fasting plasma glucose, insulin and lipids were similar between the groups. PCOS group showed significantly higher serum levels of TMAO and its precursors; choline, betaine and carnitine. TMAO and choline showed correlations with T. After 3 months of OC use, TMAO and its precursors significantly decreased along with reductions in BMI, T and FAI. CONCLUSIONS This study reports for the first time that TMAO and its precursors are elevated in PCOS which might contribute to increased cardiometabolic risk of the syndrome and that short-term OC use along with lifestyle intervention is associated with reduction of these microbiome-dependent metabolites.
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Affiliation(s)
- Nesrin Damla Eyupoglu
- Department of Internal Medicine, Hacettepe University School of Medicine, Ankara, Turkey
| | - Ezgi Caliskan Guzelce
- Department of Internal Medicine, Hacettepe University School of Medicine, Ankara, Turkey
| | - Aylin Acikgoz
- Department of Nutrition and Dietetics, Hacettepe University School of Health Sciences, Ankara, Turkey
| | - Esra Uyanik
- Department of Gynecology and Obstetrics, Hacettepe University School of Medicine, Ankara, Turkey
| | - Bodil Bjørndal
- Department of Clinical Sciences, University of Bergen, Bergen, Norway
| | - Rolf K Berge
- Department of Clinical Sciences, University of Bergen, Bergen, Norway
- Department of Heart Disease, Haukeland University Hospital, Bergen, Norway
| | - Asbjørn Svardal
- Department of Clinical Sciences, University of Bergen, Bergen, Norway
| | - Bulent Okan Yildiz
- Department of Internal Medicine, Hacettepe University School of Medicine, Ankara, Turkey
- Division of Endocrinology and Metabolism, Hacettepe University School of Medicine, Ankara, Turkey
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Hill E, Sapa H, Negrea L, Bame K, Hostetter T, Barkoukis H, Dusso A, Dobre M. Effect of Oat β-Glucan Supplementation on Chronic Kidney Disease: A Feasibility Study. J Ren Nutr 2019; 30:208-215. [PMID: 31668649 DOI: 10.1053/j.jrn.2019.06.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 05/20/2019] [Accepted: 06/29/2019] [Indexed: 12/28/2022] Open
Abstract
OBJECTIVE Dietary supplementation with grains containing high β-glucan fiber has been shown to attenuate the progression of chronic kidney disease (CKD) and vascular calcification in animal models. The aim of this study was to investigate the feasibility of consuming an oat β-glucan supplement and to assess its effects on certain uremic toxins and markers of mineral metabolism in patients with CKD. DESIGN This is a 20-week, nonrandomized, single-center, pretest-posttest study. Twenty-eight subjects with CKD stages 3-4 were enrolled. The mean age was 67.6 ± 8.9 years, and the mean estimated glomerular filtration rate was 35 ± 14 mL/min/1.73 m2. Subjects received a dietary supplement containing 3 g of oat β-glucan per day for 12 weeks. The 4-week period before the start of the intervention was used as a baseline comparison for each subject. The primary outcome was pre-post supplement changes in plasma levels of two uremic toxins: trimethylamine N-oxide (TMAO) and asymmetric dimethylarginine. Secondary outcomes were pre-post supplement changes in serum calcium, phosphorus, and Klotho levels. Repeated-measures analysis of variance was used to test the differences in outcomes over the three-month-long intervention. RESULTS Serum levels of TMAO decreased by a median of -17% (interquartile range: -46%, 7%) at the end of the intervention. A nonstatistically significant change was observed for asymmetric dimethylarginine (median -0.6% [-12%, 20%]) and serum Klotho (median -3% [-8%, 7%]). There were no changes in serum levels of calcium and phosphorus. One month after discontinuation of β-glucan therapy, TMAO levels increased by a median of 16% (-12%, 36%) but remained slightly below the pretreatment levels. Eight subjects experienced side effects and discontinued the treatment. CONCLUSION A diet supplemented with β-glucan is safe and potentially efficacious in lowering serum concentrations of TMAO in patients with CKD. Larger trials with longer follow-up times are needed to determine whether such reductions translate into clinical benefits.
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Affiliation(s)
- Eddie Hill
- School of Medicine, Case Western Reserve University, Cleveland, Ohio.
| | - Hima Sapa
- School of Medicine, Case Western Reserve University, Cleveland, Ohio
| | - Lavinia Negrea
- School of Medicine, Case Western Reserve University, Cleveland, Ohio; Division of Nephrology, University Hospitals Cleveland Medical Center, Cleveland, Ohio
| | - Kristin Bame
- Clinical Nutrition Services Department, University Hospitals Cleveland Medical Center, Cleveland, Ohio
| | - Thomas Hostetter
- School of Medicine, Case Western Reserve University, Cleveland, Ohio; Division of Nephrology, University Hospitals Cleveland Medical Center, Cleveland, Ohio
| | - Hope Barkoukis
- School of Medicine, Case Western Reserve University, Cleveland, Ohio
| | - Adriana Dusso
- Bone and Mineral Research Unit, Hospital Universitario Central de Asturias, Instituto de Investigación Sanitaria del Principado de Asturias, Oviedo, Spain
| | - Mirela Dobre
- School of Medicine, Case Western Reserve University, Cleveland, Ohio; Division of Nephrology, University Hospitals Cleveland Medical Center, Cleveland, Ohio
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