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Volani C, Caprioli G, Calderisi G, Sigurdsson BB, Rainer J, Gentilini I, Hicks AA, Pramstaller PP, Weiss G, Smarason SV, Paglia G. Pre-analytic evaluation of volumetric absorptive microsampling and integration in a mass spectrometry-based metabolomics workflow. Anal Bioanal Chem 2017; 409:6263-6276. [PMID: 28815270 DOI: 10.1007/s00216-017-0571-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 07/17/2017] [Accepted: 08/04/2017] [Indexed: 01/13/2023]
Abstract
Volumetric absorptive microsampling (VAMS) is a novel approach that allows single-drop (10 μL) blood collection. Integration of VAMS with mass spectrometry (MS)-based untargeted metabolomics is an attractive solution for both human and animal studies. However, to boost the use of VAMS in metabolomics, key pre-analytical questions need to be addressed. Therefore, in this work, we integrated VAMS in a MS-based untargeted metabolomics workflow and investigated pre-analytical strategies such as sample extraction procedures and metabolome stability at different storage conditions. We first evaluated the best extraction procedure for the polar metabolome and found that the highest number and amount of metabolites were recovered upon extraction with acetonitrile/water (70:30). In contrast, basic conditions (pH 9) resulted in divergent metabolite profiles mainly resulting from the extraction of intracellular metabolites originating from red blood cells. In addition, the prolonged storage of blood samples at room temperature caused significant changes in metabolome composition, but once the VAMS devices were stored at - 80 °C, the metabolome remained stable for up to 6 months. The time used for drying the sample did also affect the metabolome. In fact, some metabolites were rapidly degraded or accumulated in the sample during the first 48 h at room temperature, indicating that a longer drying step will significantly change the concentration in the sample. Graphical abstract Volumetric absorptive microsampling (VAMS) is a novel technology that allows single-drop blood collection and, in combination with mass spectrometry (MS)-based untargeted metabolomics, represents an attractive solution for both human and animal studies. In this work, we integrated VAMS in a MS-based untargeted metabolomics workflow and investigated pre-analytical strategies such as sample extraction procedures and metabolome stability at different storage conditions. The latter revealed that prolonged storage of blood samples at room temperature caused significant changes in metabolome composition, but if VAMS devices were stored at - 80 °C, the metabolome remained stable for up to 6 months.
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Affiliation(s)
- Chiara Volani
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Via Galvani 31, 39100, Bolzano/Bozen, Italy
- Department of Internal Medicine II (Infectious Diseases, Immunology, Rheumatology and Pneumology), Medical University of Innsbruck, Anichstrasse 35, 6020, Innsbruck, Austria
| | - Giulia Caprioli
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Via Galvani 31, 39100, Bolzano/Bozen, Italy
| | - Giovanni Calderisi
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Via Galvani 31, 39100, Bolzano/Bozen, Italy
| | - Baldur B Sigurdsson
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Via Galvani 31, 39100, Bolzano/Bozen, Italy
| | - Johannes Rainer
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Via Galvani 31, 39100, Bolzano/Bozen, Italy
| | - Ivo Gentilini
- Transfusion Center of the Hospital of Bolzano, Lorenz Böhler Str. 5, 39100, Bozen, Italy
| | - Andrew A Hicks
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Via Galvani 31, 39100, Bolzano/Bozen, Italy
| | - Peter P Pramstaller
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Via Galvani 31, 39100, Bolzano/Bozen, Italy
| | - Guenter Weiss
- Department of Internal Medicine II (Infectious Diseases, Immunology, Rheumatology and Pneumology), Medical University of Innsbruck, Anichstrasse 35, 6020, Innsbruck, Austria
| | - Sigurdur V Smarason
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Via Galvani 31, 39100, Bolzano/Bozen, Italy
| | - Giuseppe Paglia
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Via Galvani 31, 39100, Bolzano/Bozen, Italy.
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52
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Ulvik A, Hustad S, McCann A, Midttun Ø, Nygård OK, Ueland PM. Ratios of One-Carbon Metabolites Are Functional Markers of B-Vitamin Status in a Norwegian Coronary Angiography Screening Cohort. J Nutr 2017; 147:1167-1173. [PMID: 28381531 DOI: 10.3945/jn.116.244657] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 01/03/2017] [Accepted: 03/15/2017] [Indexed: 11/14/2022] Open
Abstract
Background: Functional (metabolic) markers of B-vitamin status, including plasma total homocysteine (tHcy) for folate and plasma methylmalonic acid (MMA) for vitamin B-12, suffer from moderate sensitivity and poor specificity. Ratios of metabolites belonging to the same pathway may have better performance characteristics.Objective: We evaluated the ratios of tHcy to total cysteine (tCys; Hcy:Cys), tHcy to creatinine (Hcy:Cre), and tHcy to tCys to creatinine (Hcy:Cys:Cre) as functional markers of B-vitamin status represented by a summary score composed of folate, cobalamin, betaine, pyridoxal 5'-phosphate (PLP), and riboflavin concentrations measured in plasma.Methods: Cross-sectional data were obtained from a cohort of patients with stable angina pectoris (2994 men and 1167 women) aged 21-88 y. The relative contribution of the B-vitamin score, age, sex, smoking, body mass index, and markers of renal function and inflammation to the variance of the functional B-vitamin markers was calculated by using multiple linear regression.Results: Compared with tHcy alone, Hcy:Cys, Hcy:Cre, and Hcy:Cys:Cre all showed improved sensitivity and specificity for detecting plasma B-vitamin status. Improvements in overall performance ranged from 4-fold for Hcy:Cys to ∼8-fold for Hcy:Cys:Cre and were particularly strong in subjects with the common 5,10-methylenetetrahydrofolate reductase (MTHFR) 677CC genotype.Conclusions: Ratios of tHcy to tCys and/or creatinine showed a severalfold improvement over tHcy alone as functional markers of B-vitamin status in Norwegian coronary angiography screenees. The biological rationale for these ratios is discussed in terms of known properties of enzymes involved in the catabolism of homocysteine and synthesis of creatine and creatinine.
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Affiliation(s)
| | - Steinar Hustad
- Department of Clinical Science, University of Bergen, Bergen, Norway
| | | | | | - Ottar K Nygård
- Department of Clinical Science, University of Bergen, Bergen, Norway.,Department of Heart Disease, Haukeland University Hospital, Bergen, Norway; and
| | - Per M Ueland
- Department of Clinical Science, University of Bergen, Bergen, Norway.,Laboratory of Clinical Biochemistry, Haukeland University Hospital, Bergen, Norway
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53
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Midttun Ø, Theofylaktopoulou D, McCann A, Fanidi A, Muller DC, Meyer K, Ulvik A, Zheng W, Shu XO, Xiang YB, Prentice R, Thomson CA, Pettinger M, Giles GG, Hodge A, Cai Q, Blot WJ, Wu J, Johansson M, Hultdin J, Grankvist K, Stevens VL, McCullough ML, Weinstein SJ, Albanes D, Langhammer A, Hveem K, Næss M, Sesso HD, Gaziano JM, Buring JE, Lee IM, Severi G, Zhang X, Han J, Stampfer MJ, Smith-Warner SA, Zeleniuch-Jacquotte A, le Marchand L, Yuan JM, Butler LM, Koh WP, Wang R, Gao YT, Ericson U, Sonestedt E, Ziegler RG, Freedman ND, Visvanathan K, Jones MR, Relton C, Brennan P, Johansson M, Ueland PM. Circulating concentrations of biomarkers and metabolites related to vitamin status, one-carbon and the kynurenine pathways in US, Nordic, Asian, and Australian populations. Am J Clin Nutr 2017; 105:1314-1326. [PMID: 28424186 PMCID: PMC5445679 DOI: 10.3945/ajcn.116.151241] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 03/16/2017] [Indexed: 12/21/2022] Open
Abstract
Background: Circulating concentrations of biomarkers that are related to vitamin status vary by factors such as diet, fortification, and supplement use. Published biomarker concentrations have also been influenced by the variation across laboratories, which complicates a comparison of results from different studies.Objective: We robustly and comprehensively assessed differences in biomarkers that are related to vitamin status across geographic regions.Design: The trial was a cross-sectional study in which we investigated 38 biomarkers that are related to vitamin status and one-carbon and tryptophan metabolism in serum and plasma from 5314 healthy control subjects representing 20 cohorts recruited from the United States, Nordic countries, Asia, and Australia, participating in the Lung Cancer Cohort Consortium. All samples were analyzed in a centralized laboratory.Results: Circulating concentrations of riboflavin, pyridoxal 5'-phosphate, folate, vitamin B-12, all-trans retinol, 25-hydroxyvitamin D, and α-tocopherol as well as combined vitamin scores that were based on these nutrients showed that the general B-vitamin concentration was highest in the United States and that the B vitamins and lipid soluble vitamins were low in Asians. Conversely, circulating concentrations of metabolites that are inversely related to B vitamins involved in the one-carbon and kynurenine pathways were high in Asians. The high B-vitamin concentration in the United States appears to be driven mainly by multivitamin-supplement users.Conclusions: The observed differences likely reflect the variation in intake of vitamins and, in particular, the widespread multivitamin-supplement use in the United States. The results provide valuable information about the differences in biomarker concentrations in populations across continents.
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Affiliation(s)
| | | | | | - Anouar Fanidi
- Genetic Epidemiology Group, International Agency for Research on Cancer, Lyon, France
| | - David C Muller
- Genetic Epidemiology Group, International Agency for Research on Cancer, Lyon, France
- Department of Epidemiology and Biostatistics, Imperial College London, London, United Kingdom
| | | | | | - Wei Zheng
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, TN
| | - Xiao-Ou Shu
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, TN
| | - Yong-Bing Xiang
- Department of Epidemiology, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Ross Prentice
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA
| | - Cynthia A Thomson
- Health Promotion Sciences, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, AZ
| | - Mary Pettinger
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA
| | - Graham G Giles
- Cancer Epidemiology Center, Cancer Council Victoria, Melbourne, Victoria, Australia
- Center for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, University of Melbourne, Victoria, Australia
| | - Allison Hodge
- Cancer Epidemiology Center, Cancer Council Victoria, Melbourne, Victoria, Australia
- Center for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, University of Melbourne, Victoria, Australia
| | - Qiuyin Cai
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, TN
| | - William J Blot
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, TN
- International Epidemiology Institute, Rockville, MD
| | - Jie Wu
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, TN
| | | | - Johan Hultdin
- Department of Medical Biosciences, Clinical Chemistry, Umeå University, Umeå, Sweden
| | - Kjell Grankvist
- Department of Medical Biosciences, Clinical Chemistry, Umeå University, Umeå, Sweden
| | | | | | - Stephanie J Weinstein
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Bethesda, MD
| | - Demetrius Albanes
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Bethesda, MD
| | - Arnulf Langhammer
- Nord-Trøndelag Health Study Research Center, Department of Public Health and Nursing, Faculty of Medicine and Health Science, Norwegian University of Science and Technology, Levanger, Norway
| | - Kristian Hveem
- Nord-Trøndelag Health Study Research Center, Department of Public Health and Nursing, Faculty of Medicine and Health Science, Norwegian University of Science and Technology, Levanger, Norway
| | - Marit Næss
- Nord-Trøndelag Health Study Research Center, Department of Public Health and Nursing, Faculty of Medicine and Health Science, Norwegian University of Science and Technology, Levanger, Norway
| | - Howard D Sesso
- Divisions of Preventive Medicine and
- Aging, Brigham and Women's Hospital, Boston, MA
- Departments of Epidemiology and
| | - J Michael Gaziano
- Aging, Brigham and Women's Hospital, Boston, MA
- VA Boston Healthcare System, Boston, MA
| | - Julie E Buring
- Divisions of Preventive Medicine and
- Departments of Epidemiology and
| | - I-Min Lee
- Divisions of Preventive Medicine and
- Departments of Epidemiology and
| | - Gianluca Severi
- Human Genetics Foundation, Turin, Italy
- Centre for Research in Epidemiology and Population Health (U1018 French National Institute of Health and Medical Research), Facultés de Médecine Université Paris-Sud, Université de Versailles Saint-Quentin-en-Yvelines, Université Paris-Saclay, Villejuif, France
| | - Xuehong Zhang
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | | | - Meir J Stampfer
- Departments of Epidemiology and
- Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | | | | | - Loic le Marchand
- Epidemiology Program, University of Hawaii Cancer Center, Honolulu, HI
| | - Jian-Min Yuan
- Division of Cancer Control and Population Sciences, University of Pittsburgh Cancer Institute, Pittsburgh, PA
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA
| | - Lesley M Butler
- Division of Cancer Control and Population Sciences, University of Pittsburgh Cancer Institute, Pittsburgh, PA
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA
| | - Woon-Puay Koh
- Duke-National University of Singapore (NSU) Medical School, Singapore, and Saw Swee Hock School of Public Health, NSU, Singapore, Singapore
| | - Renwei Wang
- Division of Cancer Control and Population Sciences, University of Pittsburgh Cancer Institute, Pittsburgh, PA
| | - Yu-Tang Gao
- Department of Epidemiology, Shanghai Cancer Institute, Shanghai Jiaotong University, Shanghai, China
| | - Ulrika Ericson
- Department of clinical sciences Malmö, Lund University, Lund, Sweden
| | - Emily Sonestedt
- Department of clinical sciences Malmö, Lund University, Lund, Sweden
| | - Regina G Ziegler
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Bethesda, MD
| | - Neal D Freedman
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Bethesda, MD
| | - Kala Visvanathan
- Johns Hopkins Bloomberg School of Public Health and Johns Hopkins Sidney Kimmel Comprehensive Center, School of Medicine, Baltimore, MD
| | - Miranda R Jones
- Johns Hopkins Bloomberg School of Public Health and Johns Hopkins Sidney Kimmel Comprehensive Center, School of Medicine, Baltimore, MD
| | - Caroline Relton
- Institute of Genetic Medicine, Newcastle University, Newcastle, United Kingdom
- Medical Research Council Integrative Epidemiology Unit, School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom; and
| | - Paul Brennan
- Genetic Epidemiology Group, International Agency for Research on Cancer, Lyon, France
| | - Mattias Johansson
- Genetic Epidemiology Group, International Agency for Research on Cancer, Lyon, France
| | - Per M Ueland
- Department of Clinical Science, University of Bergen, Bergen, Norway
- Laboratory of Clinical Biochemistry, Haukeland University Hospital, Bergen, Norway
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Myte R, Gylling B, Häggström J, Schneede J, Magne Ueland P, Hallmans G, Johansson I, Palmqvist R, Van Guelpen B. Untangling the role of one-carbon metabolism in colorectal cancer risk: a comprehensive Bayesian network analysis. Sci Rep 2017; 7:43434. [PMID: 28233834 PMCID: PMC5324061 DOI: 10.1038/srep43434] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 01/24/2017] [Indexed: 02/06/2023] Open
Abstract
The role of one-carbon metabolism (1CM), particularly folate, in colorectal cancer (CRC) development has been extensively studied, but with inconclusive results. Given the complexity of 1CM, the conventional approach, investigating components individually, may be insufficient. We used a machine learning-based Bayesian network approach to study, simultaneously, 14 circulating one-carbon metabolites, 17 related single nucleotide polymorphisms (SNPs), and several environmental factors in relation to CRC risk in 613 cases and 1190 controls from the prospective Northern Sweden Health and Disease Study. The estimated networks corresponded largely to known biochemical relationships. Plasma concentrations of folate (direct), vitamin B6 (pyridoxal 5-phosphate) (inverse), and vitamin B2 (riboflavin) (inverse) had the strongest independent associations with CRC risk. Our study demonstrates the importance of incorporating B-vitamins in future studies of 1CM and CRC development, and the usefulness of Bayesian network learning for investigating complex biological systems in relation to disease.
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Affiliation(s)
- Robin Myte
- Department of Radiation Sciences, Oncology, Umeå University, Umeå, Sweden
| | - Björn Gylling
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden
| | - Jenny Häggström
- Department of Statistics, Umeå School of Business and Economics, Umeå University, Umeå, Sweden
| | - Jörn Schneede
- Department of Clinical Pharmacology, Pharmacology and Clinical Neurosciences, Umeå University, Umeå, Sweden
| | - Per Magne Ueland
- Department of Clinical Science, University of Bergen and Laboratory of Clinical Biochemistry, Haukeland University Hospital, Bergen, Norway
| | - Göran Hallmans
- Department of Biobank Research, Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
| | | | - Richard Palmqvist
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden
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55
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Price AJ, Travis RC, Appleby PN, Albanes D, Barricarte Gurrea A, Bjørge T, Bueno-de-Mesquita HB, Chen C, Donovan J, Gislefoss R, Goodman G, Gunter M, Hamdy FC, Johansson M, King IB, Kühn T, Männistö S, Martin RM, Meyer K, Neal DE, Neuhouser ML, Nygård O, Stattin P, Tell GS, Trichopoulou A, Tumino R, Ueland PM, Ulvik A, de Vogel S, Vollset SE, Weinstein SJ, Key TJ, Allen NE. Circulating Folate and Vitamin B 12 and Risk of Prostate Cancer: A Collaborative Analysis of Individual Participant Data from Six Cohorts Including 6875 Cases and 8104 Controls. Eur Urol 2016; 70:941-951. [PMID: 27061263 PMCID: PMC5094800 DOI: 10.1016/j.eururo.2016.03.029] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 03/16/2016] [Indexed: 01/21/2023]
Abstract
BACKGROUND Folate and vitamin B12 are essential for maintaining DNA integrity and may influence prostate cancer (PCa) risk, but the association with clinically relevant, advanced stage, and high-grade disease is unclear. OBJECTIVE To investigate the associations between circulating folate and vitamin B12 concentrations and risk of PCa overall and by disease stage and grade. DESIGN, SETTING, AND PARTICIPANTS A study was performed with a nested case-control design based on individual participant data from six cohort studies including 6875 cases and 8104 controls; blood collection from 1981 to 2008, and an average follow-up of 8.9 yr (standard deviation 7.3). Odds ratios (ORs) of incident PCa by study-specific fifths of circulating folate and vitamin B12 were calculated using multivariable adjusted conditional logistic regression. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS Incident PCa and subtype by stage and grade. RESULTS AND LIMITATIONS Higher folate and vitamin B12 concentrations were associated with a small increase in risk of PCa (ORs for the top vs bottom fifths were 1.13 [95% confidence interval (CI), 1.02-1.26], ptrend=0.018, for folate and 1.12 [95% CI, 1.01-1.25], ptrend=0.017, for vitamin B12), with no evidence of heterogeneity between studies. The association with folate varied by tumour grade (pheterogeneity<0.001); higher folate concentration was associated with an elevated risk of high-grade disease (OR for the top vs bottom fifth: 2.30 [95% CI, 1.28-4.12]; ptrend=0.001), with no association for low-grade disease. There was no evidence of heterogeneity in the association of folate with risk by stage or of vitamin B12 with risk by stage or grade of disease (pheterogeneity>0.05). Use of single blood-sample measurements of folate and B12 concentrations is a limitation. CONCLUSIONS The association between higher folate concentration and risk of high-grade disease, not evident for low-grade disease, suggests a possible role for folate in the progression of clinically relevant PCa and warrants further investigation. PATIENT SUMMARY Folate, a vitamin obtained from foods and supplements, is important for maintaining cell health. In this study, however, men with higher blood folate levels were at greater risk of high-grade (more aggressive) prostate cancer compared with men with lower folate levels. Further research is needed to investigate the possible role of folate in the progression of this disease.
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Affiliation(s)
- Alison J Price
- Cancer Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, OX3 7LF, UK; London School of Hygiene and Tropical Medicine, London, UK.
| | - Ruth C Travis
- Cancer Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, OX3 7LF, UK
| | - Paul N Appleby
- Cancer Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, OX3 7LF, UK
| | - Demetrius Albanes
- Nutritional Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda MD, USA
| | - Aurelio Barricarte Gurrea
- Navarra Public Health Institute, Pamplona, Spain; Navarra Institute for Health Research (IdiSNA), Pamplona, Spain; CIBER Epidemiology and Public Health (CIBERESP), Madrid, Spain
| | - Tone Bjørge
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway; Cancer Registry of Norway, Oslo, Norway
| | - H Bas Bueno-de-Mesquita
- Department for Determinants of Chronic Diseases, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands; Department of Gastroenterology and Hepatology, University Medical Centre, Utrecht, The Netherlands; Department of Epidemiology and Biostatistics, The School of Public Health, Imperial College London, London, UK; Department of Social and Preventive Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Chu Chen
- Public Health Sciences Division, Program in Epidemiology, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Jenny Donovan
- School of Social and Community Medicine, University of Bristol, Bristol, UK
| | - Randi Gislefoss
- Cancer Registry of Norway, Oslo, Norway; Institute of Population-based research, Montebello, Oslo, Norway
| | - Gary Goodman
- Public Health Sciences Division, Program in Epidemiology, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Marc Gunter
- Department of Epidemiology and Biostatistics, The School of Public Health, Imperial College London, London, UK
| | - Freddie C Hamdy
- Nuffield Department of Surgery, University of Oxford, John Radcliffe Hospital, Oxford, UK
| | - Mattias Johansson
- International Agency for Research on Cancer, Lyon, France; Department of Biobank Research, Umeå University, Umeå, Sweden
| | - Irena B King
- Department of Internal Medicine, University of New Mexico, Albuquerque, NM, USA
| | - Tilman Kühn
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Satu Männistö
- Department of Health, National Institute for Health and Welfare, Helsinki, Finland
| | - Richard M Martin
- School of Social and Community Medicine, University of Bristol, Bristol, UK; Medical Research Council/University of Bristol Integrative Epidemiology Unit, University of Bristol, Bristol, UK; National Institute for Health Research, Bristol Biomedical Research Unit in Nutrition, Bristol, UK
| | | | - David E Neal
- Department of Oncology, University of Cambridge, Addenbrooke's Hospital, Cambridge, UK
| | - Marian L Neuhouser
- Public Health Sciences Division, Program in Epidemiology, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Ottar Nygård
- Department of Clinical Science, University of Bergen, Bergen, Norway; Department of Heart Disease, Haukeland University Hospital, Bergen, Norway
| | - Par Stattin
- Department of Surgical and Perioperative Sciences, Urology and Andrology, Umeå University, Umeå, Sweden
| | - Grethe S Tell
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - Antonia Trichopoulou
- WHO Collaborating Center for Nutrition and Health, Unit of Nutritional Epidemiology and Nutrition in Public Health, Department of Hygiene, Epidemiology and Medical Statistics, University of Athens, Greece; Hellenic Health Foundation, Athens, Greece
| | - Rosario Tumino
- Cancer Registry and Histopathology Unit, "Civic - M.P. Arezzo" Hospital, ASP Ragusa, Ragusa, Italy
| | - Per Magne Ueland
- Department of Clinical Science, University of Bergen, Bergen, Norway
| | | | - Stefan de Vogel
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - Stein Emil Vollset
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway; Norwegian Institute of Public Health, Bergen, Norway
| | - Stephanie J Weinstein
- Nutritional Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda MD, USA
| | - Timothy J Key
- Cancer Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, OX3 7LF, UK
| | - Naomi E Allen
- Clinical trial Service Unit and Epidemiological Studies Unit, Nuffield Department of Clinical Medicine, University of Oxford, UK
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Bjørke-Monsen AL, Ulvik A, Nilsen RM, Midttun Ø, Roth C, Magnus P, Stoltenberg C, Vollset SE, Reichborn-Kjennerud T, Ueland PM. Impact of Pre-Pregnancy BMI on B Vitamin and Inflammatory Status in Early Pregnancy: An Observational Cohort Study. Nutrients 2016; 8:nu8120776. [PMID: 27916904 PMCID: PMC5188431 DOI: 10.3390/nu8120776] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 11/25/2016] [Accepted: 11/28/2016] [Indexed: 12/13/2022] Open
Abstract
Maternal nutrition and inflammation have been suggested as mediators in the development of various adverse pregnancy outcomes associated with maternal obesity. We have investigated the relation between pre-pregnancy BMI, B vitamin status, and inflammatory markers in a group of healthy pregnant women. Cobalamin, folate, pyridoxal 5′-phosphate, and riboflavin; and the metabolic markers homocysteine, methylmalonic acid, and 3-hydroxykynurenine/xanthurenic acid ratio (HK/XA); and markers of cellular inflammation, neopterin and kynurenine/tryptophan ratio (KTR) were determined in pregnancy week 18 and related to pre-pregnancy body mass index (BMI), in 2797 women from the Norwegian Mother and Child Cohort Study (MoBa). Pre-pregnancy BMI was inversely related to folate, cobalamin, pyridoxal 5′-phosphate (PLP), and riboflavin (p < 0.001), and associated with increased neopterin and KTR levels (p < 0.001). Inflammation seemed to be an independent predictor of low vitamin B6 status, as verified by low PLP and high HK/XA ratio. A high pre-pregnancy BMI is a risk factor for low B vitamin status and increased cellular inflammation. As an optimal micronutrient status is vital for normal fetal development, the observed lower B vitamin levels may contribute to adverse pregnancy outcomes associated with maternal obesity and B vitamin status should be assessed in women with high BMI before they get pregnant.
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Affiliation(s)
| | | | - Roy M Nilsen
- Centre for Clinical Research, Haukeland University Hospital, 5021 Bergen, Norway.
| | | | - Christine Roth
- The Norwegian Institute of Public Health, 0403 Oslo, Norway.
- Imprints Center for Genetic and Environmental Life Course Studies, Mailman School of Public Health and New York State Psychiatric Institute, Columbia University, New York, NY 10027, USA.
| | - Per Magnus
- The Norwegian Institute of Public Health, 0403 Oslo, Norway.
| | - Camilla Stoltenberg
- The Norwegian Institute of Public Health, 0403 Oslo, Norway.
- Department of Public Health and Primary Health Care, University of Bergen, 5007 Bergen, Norway.
| | - Stein Emil Vollset
- The Norwegian Institute of Public Health, 0403 Oslo, Norway.
- Department of Public Health and Primary Health Care, University of Bergen, 5007 Bergen, Norway.
| | - Ted Reichborn-Kjennerud
- The Norwegian Institute of Public Health, 0403 Oslo, Norway.
- Institute of Clinical Medicine, University of Oslo, 0313 Oslo, Norway.
| | - Per Magne Ueland
- Laboratory of Clinical Biochemistry, Haukeland University Hospital, 5021 Bergen, Norway.
- Department of Clinical Science, University of Bergen, 5007 Bergen, Norway.
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Landaas ET, Aarsland TIM, Ulvik A, Halmøy A, Ueland PM, Haavik J. Vitamin levels in adults with ADHD. BJPsych Open 2016; 2:377-384. [PMID: 27990293 PMCID: PMC5153567 DOI: 10.1192/bjpo.bp.116.003491] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 11/16/2016] [Accepted: 11/17/2016] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND Micronutrients containing vitamins are reported to reduce symptom levels in persons with attention-deficit hyperactivity disorder (ADHD), but data on vitamin levels in ADHD are sparse. AIMS To examine the relationship between vitamin concentrations, ADHD diagnosis and psychiatric symptoms in young adult ADHD patients and controls. METHOD Eight vitamins and the nicotine metabolite cotinine were analysed in serum samples from 133 ADHD patients and 131 controls aged between 18 and 40, who also reported ADHD symptoms and comorbid conditions. RESULTS Lower concentrations of vitamins B2, B6 and B9 were associated with the ADHD diagnosis, and B2 and B6 also with symptom severity. Smokers had lower levels of vitamins B2 and B9. CONCLUSIONS ADHD patients were overrepresented in the group with low levels of some vitamins, possibly indicative of inadequate dietary intake of these micronutrients in a subgroup of patients. It is important to identify these patients in dietary intervention trials of ADHD. DECLARATION OF INTEREST J.H. has received lecture honoraria as part of continuing medical education programmes sponsored by Novartis, Eli Lilly and Company, and Janssen-Cilag. COPYRIGHT AND USAGE © The Royal College of Psychiatrists 2016. This is an open access article distributed under the terms of the Creative Commons Non-Commercial, No Derivatives (CC BY-NC-ND) license.
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Affiliation(s)
- Elisabeth Toverud Landaas
- , MD, PhD, K.G Jebsen Centre for Neuropsychiatric Disorders, Department of Biomedicine, University of Bergen, Bergen, Norway
| | - Tore Ivar Malmei Aarsland
- , Stud. med., K.G Jebsen Centre for Neuropsychiatric Disorders, Department of Biomedicine, University of Bergen, Bergen, Norway
| | | | - Anne Halmøy
- , MD, PhD, Division of Psychiatry, Haukeland University Hospital, Bergen, Norway; K.G Jebsen Centre for Neuropsychiatric Disorders, Department of Biomedicine, University of Bergen, Bergen, Norway
| | - Per Magne Ueland
- , MD, PhD, Section for Pharmacology, Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Jan Haavik
- , MD, PhD, Division of Psychiatry, Haukeland University Hospital, Bergen, Norway; K.G. Jebsen Centre for Neuropsychiatric Disorders, Department of Biomedicine, University of Bergen, Bergen, Norway
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Obeid R, Awwad HM, Keller M, Geisel J. Trimethylamine-N-oxide and its biological variations in vegetarians. Eur J Nutr 2016; 56:2599-2609. [PMID: 27562778 DOI: 10.1007/s00394-016-1295-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Accepted: 08/11/2016] [Indexed: 01/13/2023]
Abstract
PURPOSE Restriction of animal foods and choline may affect plasma trimethylamine-N-oxide (TMAO). In vegetarians, we investigated the association between TMAO concentrations and the strictness of the diet or sex. We also studied the biological variations of TMAO in vegans. METHODS Concentrations of plasma TMAO and choline metabolites were measured in 38 vegans and 67 lacto-ovo-vegetarians (group 1: mean age ± SD = 50 ± 15 years). Group 2 consisted of 66 vegans (29.2 ± 7.3 years) that was tested twice within 3 months of intervention with vitamin B12 or a placebo. RESULTS In group 1, plasma TMAO did not differ according to the strictness of the diet (both means 3.7 µmol/L). In lacto-ovo-vegetarians, men had higher TMAO and betaine, but lower trimethylamine than women. In group 2, the intervention with vitamin B12 had no effect on plasma TMAO or choline metabolites. The mean within-subject change of TMAO within 3 months was -0.3 (95 % confidence intervals = -0.7-0.1 µmol/L). TMAO increased after 3 months (mean 1.7 to 2.8 µmol/L) in vegans with a lower baseline dimethylglycine (2.2 µmol/L), while it declined (from 2.7 to 1.9 µmol/L) in vegans with a higher dimethylglycine (3.1 µmol/L). The intra-class correlation coefficients were 0.819 for TMAO, 0.885 for betaine and 0.860 for dimethylglycine. CONCLUSIONS Plasma TMAO was not related to the strictness of the vegetarian diet. Metabolisms of TMAO and dimethylglycine are interrelated. Intra-individual variations of TMAO are low in vegans. Changes of fasting plasma TMAO >80 % upon retesting are likely to exceed the biological variations.
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Affiliation(s)
- Rima Obeid
- Department of Clinical Chemistry and Laboratory Medicine, Saarland University Hospital, Building 57, 66421, Homburg/Saar, Germany. .,Aarhus Institute of Advanced Studies, University of Aarhus, Høegh-Guldbergs Gade 6B, Building 1632, 8000, Aarhus C, Denmark.
| | - Hussain M Awwad
- Department of Clinical Chemistry and Laboratory Medicine, Saarland University Hospital, Building 57, 66421, Homburg/Saar, Germany
| | - Markus Keller
- Institute of Alternative and Sustainable Nutrition, 35444, Biebertal/Giessen, Germany
| | - Juergen Geisel
- Department of Clinical Chemistry and Laboratory Medicine, Saarland University Hospital, Building 57, 66421, Homburg/Saar, Germany
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Grützner N, Knabe D, Lawhorn BD, Dominguez B, Kauffold J, Suchodolski JS, Steiner JM. Analytic validation of commercially available immunoassays for the measurement of serum cobalamin and folate concentrations in pigs. Vet Clin Pathol 2016; 45:311-9. [DOI: 10.1111/vcp.12361] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Niels Grützner
- Gastrointestinal Laboratory; Department of Small Animal Clinical Sciences; College of Veterinary Medicine and Biomedical Sciences; Texas A&M University; College Station TX USA
| | - Darrel Knabe
- Department of Animal Science; Texas A&M University; College Station TX USA
| | - Bruce D. Lawhorn
- Department of Veterinary Large Animal Clinical Sciences; College of Veterinary Medicine and Biomedical Sciences; Texas A&M University; College Station TX USA
| | - Brandon Dominguez
- Department of Veterinary Large Animal Clinical Sciences; College of Veterinary Medicine and Biomedical Sciences; Texas A&M University; College Station TX USA
| | - Johannes Kauffold
- New Bolton Center; School of Veterinary Medicine; University of Pennsylvania; Kennett Square PA USA
| | - Jan S. Suchodolski
- Gastrointestinal Laboratory; Department of Small Animal Clinical Sciences; College of Veterinary Medicine and Biomedical Sciences; Texas A&M University; College Station TX USA
| | - Jörg M. Steiner
- Gastrointestinal Laboratory; Department of Small Animal Clinical Sciences; College of Veterinary Medicine and Biomedical Sciences; Texas A&M University; College Station TX USA
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Du YF, Lin FY, Long WQ, Luo WP, Yan B, Xu M, Mo XF, Zhang CX. Serum betaine but not choline is inversely associated with breast cancer risk: a case-control study in China. Eur J Nutr 2016; 56:1329-1337. [PMID: 26897124 DOI: 10.1007/s00394-016-1183-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 02/06/2016] [Indexed: 02/02/2023]
Abstract
PURPOSE Choline and betaine are important for DNA methylation and synthesis, and may affect tumor carcinogenesis. To our knowledge, no previous study has examined the association between serum choline and betaine and breast cancer risk. This study aimed to examine whether serum choline and betaine were inversely associated with breast cancer risk among Chinese women. METHODS This hospital-based case-control study consecutively recruited 510 breast cancer cases and 518 frequency-matched (age and residence) controls, and blood samples were available for 500 cases and 500 controls. Serum choline and betaine were assayed by high-performance liquid chromatography-tandem mass spectrometry. Multiple unconditional logistic regression was used to estimate odds ratios (ORs) and 95 % confidence intervals (CIs). RESULTS An inverse association with breast cancer risk was observed for serum betaine (fourth vs first quartile adjusted OR 0.68, 95 % CI 0.47-0.97) and for the ratio of serum betaine to choline (fourth vs first quartile adjusted OR 0.70, 95 % CI 0.48-1.00), but not for serum choline (fourth vs first quartile adjusted OR 0.80, 95 % CI 0.56-1.15). Serum betaine was inversely associated with breast cancer risk in subjects with below-median dietary folate intake (fourth vs first quartile adjusted OR 0.48, 95 % CI 0.30-0.77). CONCLUSIONS This study suggested that serum betaine but not choline was inversely associated with breast cancer risk. This result needed to be further confirmed by the prospective studies.
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Affiliation(s)
- Yu-Feng Du
- Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, 74 Zhongshan Road 2, Guangzhou, 510080, China
| | - Fang-Yu Lin
- Nursing Department, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, China
| | - Wei-Qing Long
- Department of Clinical Laboratory, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, China
| | - Wei-Ping Luo
- Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, 74 Zhongshan Road 2, Guangzhou, 510080, China
| | - Bo Yan
- Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, 74 Zhongshan Road 2, Guangzhou, 510080, China
| | - Ming Xu
- Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, 74 Zhongshan Road 2, Guangzhou, 510080, China
| | - Xiong-Fei Mo
- Department of Vascular Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, China
| | - Cai-Xia Zhang
- Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, 74 Zhongshan Road 2, Guangzhou, 510080, China.
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Aarsland TIM, Landaas ET, Hegvik TA, Ulvik A, Halmøy A, Ueland PM, Haavik J. Serum concentrations of kynurenines in adult patients with attention-deficit hyperactivity disorder (ADHD): a case-control study. Behav Brain Funct 2015; 11:36. [PMID: 26542774 PMCID: PMC4636001 DOI: 10.1186/s12993-015-0080-x] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 10/22/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The essential amino acid tryptophan is catabolised mainly through the kynurenine pathway. Altered circulating levels of kynurenines have been reported in chronic inflammatory conditions and in several neuropsychiatric disorders, including depression and schizophrenia. Candidate gene studies suggest that genes related to the kynurenine catabolism may be associated with attention-deficit hyperactivity disorder (ADHD). Additionally, ADHD patients often report comorbid depression or anxiety. In this study we investigated serum levels of kynurenines in Norwegian adult ADHD patients and adult controls. METHODS We compared serum levels of tryptophan and the seven tryptophan metabolites kynurenine, kynurenic acid, anthranilic acid, 3-hydroxykynurenine, xanthurenic acid, 3-hydroxyanthranilic acid and quinolinic acid in 133 adult patients with ADHD and 131 adult controls (18-40 years). Riboflavin (vitamin B2), total vitamin B6 and the nicotine metabolite cotinine were also measured. Serum samples were analysed using mass spectrometry. Patients and controls reported comorbid disorders and past (childhood) and current ADHD symptoms using the Wender Utah Rating Scale (WURS) and the Adult ADHD Self-report Scale (ASRS). Logistic regression was used to calculate odds ratios for having an ADHD diagnosis for different serum levels of each metabolite. In addition, we used Spearman's correlation analysis to investigate the correlation between serum levels of tryptophan and kynurenines and ADHD symptom scores. RESULTS Lower serum concentrations of tryptophan [odds ratio 0.61 (95 % confidence interval 0.45-0.83)], kynurenic acid [0.73 (0.53-0.99)], xanthurenic acid [0.65 (0.48-0.89)] and 3-hydroxyanthranilic acid [0.63 (0.46-0.85)], and higher levels of cotinine [7.17 (4.37-12.58)], were significantly associated with ADHD. After adjusting for tryptophan levels, only 3-hydroxyanthranilic acid and cotinine remained significant. Lower levels of tryptophan and kynurenine were also found to be correlated with higher total ASRS score and higher total WURS score, when adjusting for smoking and age. CONCLUSIONS Our results suggest that there may be differences in serum levels of tryptophan and kynurenines between adult ADHD patients and adult controls. Although our findings do not suggest a chronic immune activation in ADHD, the underlying mechanisms and possible clinical implications of the differences should be further explored.
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Affiliation(s)
- Tore Ivar Malmei Aarsland
- Department of Biomedicine, University of Bergen, Jonas Lies vei 91, 5009, Bergen, Norway. .,K.G. Jebsen Centre for Research on Neuropsychiatric Disorders, University of Bergen, Bergen, Norway.
| | - Elisabeth Toverud Landaas
- Department of Biomedicine, University of Bergen, Jonas Lies vei 91, 5009, Bergen, Norway. .,K.G. Jebsen Centre for Research on Neuropsychiatric Disorders, University of Bergen, Bergen, Norway.
| | - Tor-Arne Hegvik
- Department of Biomedicine, University of Bergen, Jonas Lies vei 91, 5009, Bergen, Norway. .,K.G. Jebsen Centre for Research on Neuropsychiatric Disorders, University of Bergen, Bergen, Norway.
| | | | - Anne Halmøy
- Department of Biomedicine, University of Bergen, Jonas Lies vei 91, 5009, Bergen, Norway. .,K.G. Jebsen Centre for Research on Neuropsychiatric Disorders, University of Bergen, Bergen, Norway. .,Division of Psychiatry, Haukeland University Hospital, Bergen, Norway.
| | - Per Magne Ueland
- Section for Pharmacology, Department of Clinical Science, University of Bergen, Bergen, Norway.
| | - Jan Haavik
- Department of Biomedicine, University of Bergen, Jonas Lies vei 91, 5009, Bergen, Norway. .,K.G. Jebsen Centre for Research on Neuropsychiatric Disorders, University of Bergen, Bergen, Norway. .,Division of Psychiatry, Haukeland University Hospital, Bergen, Norway.
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Bailey LB, Stover PJ, McNulty H, Fenech MF, Gregory JF, Mills JL, Pfeiffer CM, Fazili Z, Zhang M, Ueland PM, Molloy AM, Caudill MA, Shane B, Berry RJ, Bailey RL, Hausman DB, Raghavan R, Raiten DJ. Biomarkers of Nutrition for Development-Folate Review. J Nutr 2015; 145:1636S-1680S. [PMID: 26451605 PMCID: PMC4478945 DOI: 10.3945/jn.114.206599] [Citation(s) in RCA: 296] [Impact Index Per Article: 32.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 12/11/2014] [Accepted: 04/14/2015] [Indexed: 12/13/2022] Open
Abstract
The Biomarkers of Nutrition for Development (BOND) project is designed to provide evidence-based advice to anyone with an interest in the role of nutrition in health. Specifically, the BOND program provides state-of-the-art information and service with regard to selection, use, and interpretation of biomarkers of nutrient exposure, status, function, and effect. To accomplish this objective, expert panels are recruited to evaluate the literature and to draft comprehensive reports on the current state of the art with regard to specific nutrient biology and available biomarkers for assessing nutrients in body tissues at the individual and population level. Phase I of the BOND project includes the evaluation of biomarkers for 6 nutrients: iodine, iron, zinc, folate, vitamin A, and vitamin B-12. This review represents the second in the series of reviews and covers all relevant aspects of folate biology and biomarkers. The article is organized to provide the reader with a full appreciation of folate's history as a public health issue, its biology, and an overview of available biomarkers (serum folate, RBC folate, and plasma homocysteine concentrations) and their interpretation across a range of clinical and population-based uses. The article also includes a list of priority research needs for advancing the area of folate biomarkers related to nutritional health status and development.
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Affiliation(s)
- Lynn B Bailey
- Department of Foods and Nutrition, University of Georgia, Athens, GA;
| | - Patrick J Stover
- Division of Nutritional Sciences, Cornell University, Ithaca, NY
| | - Helene McNulty
- Northern Ireland Centre for Food and Health, Biomedical Sciences Research Institute, University of Ulster, Londonderry, United Kingdom
| | - Michael F Fenech
- Genome Health Nutrigenomics Laboratory, Food, Nutrition, and Bioproducts Flagship, Commonwealth Scientific and Industrial Research Organization, Adelaide, Australia
| | - Jesse F Gregory
- Food Science and Human Nutrition Department, University of Florida, Gainesville, FL
| | - James L Mills
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD
| | | | - Zia Fazili
- National Center for Environmental Health, CDC, Atlanta, GA
| | - Mindy Zhang
- National Center for Environmental Health, CDC, Atlanta, GA
| | - Per M Ueland
- Department of Clinical Science, Univeristy of Bergen, Bergen, Norway
| | - Anne M Molloy
- Institute of Molecular Medicine, Trinity College, Dublin, Ireland
| | - Marie A Caudill
- Division of Nutritional Sciences, Cornell University, Ithaca, NY
| | - Barry Shane
- Department of Nutritional Sciences and Toxicology, University of California-Berkeley, Berkeley, CA
| | - Robert J Berry
- National Center on Birth Defects and Developmental Disabilities, CDC, Atlanta, GA; and
| | | | - Dorothy B Hausman
- Department of Foods and Nutrition, University of Georgia, Athens, GA
| | - Ramkripa Raghavan
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD
| | - Daniel J Raiten
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD;
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Vitamin D for the prevention of cardiovascular disease: Are we ready for that? Atherosclerosis 2015; 241:729-40. [PMID: 26135478 DOI: 10.1016/j.atherosclerosis.2015.06.034] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 06/16/2015] [Accepted: 06/16/2015] [Indexed: 11/23/2022]
Abstract
A general concept of clinical benefit of vitamin D supplementation has emerged from the evidence in prevention of osteoporosis. From the cardiovascular point of view, clinical benefit of such supplementation remains less clear. Studies in vitro and in animal models demonstrated the expression of vitamin D receptors in endothelial cells, vascular smooth muscle and cardiomyocytes. Vitamin D has been directly implicated in endothelium-mediated vasodilation, anti-coagulant activity and inhibition of the inflammatory response. Indirectly, it may favor the reduction of blood pressure, myocardial hypertrophy and ventricular arrhythmias. In contrast to these mechanistic findings, cross-sectional, longitudinal and small clinical trials have not been consistent in demonstrating association between cardiovascular events and vitamin D. Besides, methodological issues in the tests for serum levels of vitamin D may also contribute to this puzzle. Hence, in the current state of knowledge, it may be too early to consider or to rule out vitamin D as a tool to either estimate or mitigate residual cardiovascular risk. In this review, we discuss recent advances and potential limitations in mechanistic and clinical evidences that are outlining the framework of interaction between vitamin D and cardiovascular risk.
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Abstract
Measures of B6 status are categorized as direct biomarkers and as functional biomarkers. Direct biomarkers measure B6 vitamers in plasma/serum, urine and erythrocytes, and among these plasma pyridoxal 5'-phosphate (PLP) is most commonly used. Functional biomarkers include erythrocyte transaminase activities and, more recently, plasma levels of metabolites involved in PLP-dependent reactions, such as the kynurenine pathway, one-carbon metabolism, transsulfuration (cystathionine), and glycine decarboxylation (serine and glycine). Vitamin B6 status is best assessed by using a combination of biomarkers because of the influence of potential confounders, such as inflammation, alkaline phosphatase activity, low serum albumin, renal function, and inorganic phosphate. Ratios between substrate-products pairs have recently been investigated as a strategy to attenuate such influence. These efforts have provided promising new markers such as the PAr index, the 3-hydroxykynurenine:xanthurenic acid ratio, and the oxoglutarate:glutamate ratio. Targeted metabolic profiling or untargeted metabolomics based on mass spectrometry allow the simultaneous quantification of a large number of metabolites, which are currently evaluated as functional biomarkers, using data reduction statistics.
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Affiliation(s)
- Per Magne Ueland
- Department of Clinical Science, University of Bergen, and the Laboratory of Clinical Biochemistry, Haukeland University Hospital, 5021 Bergen, Norway;
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The influence of sample collection methodology and sample preprocessing on the blood metabolic profile. Bioanalysis 2015; 7:991-1006. [DOI: 10.4155/bio.15.16] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Aim: Blood serum and plasma have intrinsic differences in their composition and the preprocessing, such as clotting temperature in serum, and storage at room temperature may have further effect on metabolite concentrations. Methods: The influence of sampling preprocessing on the metabolic profiles in serum and different types of plasma was investigated using liquid chromatography and comprehensive 2D gas chromatography coupled to a mass spectrometer. Results: The profiles of polar metabolites were significantly dependent on the type of the sample, while lipid profiles were similar in serum and different types of plasma. Extended storage of plasma at room temperature resulted in degradation of lipids already after 1 day. Serum clotting at room temperature generally resulted in higher metabolite concentration compared with serum clotting on ice.
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Yin P, Lehmann R, Xu G. Effects of pre-analytical processes on blood samples used in metabolomics studies. Anal Bioanal Chem 2015; 407:4879-92. [PMID: 25736245 PMCID: PMC4471316 DOI: 10.1007/s00216-015-8565-x] [Citation(s) in RCA: 180] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 02/13/2015] [Accepted: 02/13/2015] [Indexed: 12/17/2022]
Abstract
Every day, analytical and bio-analytical chemists make sustained efforts to improve the sensitivity, specificity, robustness, and reproducibility of their methods. Especially in targeted and non-targeted profiling approaches, including metabolomics analysis, these objectives are not easy to achieve; however, robust and reproducible measurements and low coefficients of variation (CV) are crucial for successful metabolomics approaches. Nevertheless, all efforts from the analysts are in vain if the sample quality is poor, i.e. if preanalytical errors are made by the partner during sample collection. Preanalytical risks and errors are more common than expected, even when standard operating procedures (SOP) are used. This risk is particularly high in clinical studies, and poor sample quality may heavily bias the CV of the final analytical results, leading to disappointing outcomes of the study and consequently, although unjustified, to critical questions about the analytical performance of the approach from the partner who provided the samples. This review focuses on the preanalytical phase of liquid chromatography–mass spectrometry-driven metabolomics analysis of body fluids. Several important preanalytical factors that may seriously affect the profile of the investigated metabolome in body fluids, including factors before sample collection, blood drawing, subsequent handling of the whole blood (transportation), processing of plasma and serum, and inadequate conditions for sample storage, will be discussed. In addition, a detailed description of latent effects on the stability of the blood metabolome and a suggestion for a practical procedure to circumvent risks in the preanalytical phase will be given. The procedures and potential problems in preanalytical aspects of metabolomics studies using blood samples. Bias in the preanalytical phase may lead to unwanted results in the subsequential studies ![]()
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Affiliation(s)
- Peiyuan Yin
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
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Kim S, Miller BJ, Stefanek ME, Miller AH. Inflammation-induced activation of the indoleamine 2,3-dioxygenase pathway: Relevance to cancer-related fatigue. Cancer 2015; 121:2129-36. [DOI: 10.1002/cncr.29302] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 12/18/2014] [Accepted: 01/13/2015] [Indexed: 12/12/2022]
Affiliation(s)
- Sangmi Kim
- Georgia Regents University Cancer Center, Georgia Regents University; Augusta Georgia
| | - Brian J. Miller
- Department of Psychiatry and Health Behavior; Georgia Regents University; Augusta Georgia
| | - Michael E. Stefanek
- Department of Psychological Sciences; Georgia Regents University; Augusta Georgia
| | - Andrew H. Miller
- Department of Psychiatry; Emory University School of Medicine; Atlanta Georgia
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Grützner N, Suchodolski JS, Steiner JM. Relationship between cobalamin-dependent metabolites and both serum albumin and alpha1 -proteinase inhibitor concentrations in hypocobalaminemic dogs of 7 different breeds. Vet Clin Pathol 2014; 43:561-6. [PMID: 25331651 DOI: 10.1111/vcp.12204] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND Increased serum concentrations of homocysteine (HCY) and methylmalonic acid (MMA), the 2 main cobalamin-dependent metabolites, as well as decreased serum albumin and canine alpha1 -proteinase inhibitor (cα1 -PI) concentrations have previously been described in hypocobalaminemic dogs with gastrointestinal disease. However, no studies have been conducted to evaluate potential relationships between these serum biomarkers. OBJECTIVE The aim of this study was to evaluate the relationship between HCY and MMA, 2 cobalamin-dependent metabolites, and both serum albumin and cα1 -PI concentrations in hypocobalaminemic dogs. METHODS Serum samples from 285 dogs including 7 different breeds (Beagle, Boxer, Cocker Spaniel, German Shepherd, Labrador Retriever, Chinese Shar-Pei, and Yorkshire Terrier) with hypocobalaminemia were used. Serum HCY, MMA, albumin, and cα1 -PI concentrations were determined. RESULTS There was a significant correlation between serum HCY and albumin concentrations, as well as serum HCY and cα1 -PI concentrations (ρ = 0.62 and ρ = 0.37, respectively; P < .0001). No correlations were observed between serum MMA and albumin concentrations, or cα1 -PI concentrations (ρ = 0.01 and ρ = 0.08, respectively; P > .05). In addition, significant breed-specific correlations were observed between serum MMA and albumin concentrations in German Shepherds, and serum HCY and MMA concentrations in Chinese Shar-Peis with hypocobalaminemia. CONCLUSIONS This study shows a correlation between serum albumin and cα1 -PI and HCY concentrations, but not with serum MMA concentration in dogs with hypocobalaminemia. In addition, significant breed-specific correlations were observed between serum MMA and albumin concentrations in German Shepherds, as well as serum HCY and MMA concentrations in Chinese Shar-Peis, emphasizing the unique metabolic interactions in those dog breeds affected by hypocobalaminemia.
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Affiliation(s)
- Niels Grützner
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, USA
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Riboflavin status modifies the effects of methylenetetrahydrofolate reductase (MTHFR) and methionine synthase reductase (MTRR) polymorphisms on homocysteine. GENES AND NUTRITION 2014; 9:435. [PMID: 25322900 DOI: 10.1007/s12263-014-0435-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 10/06/2014] [Indexed: 01/21/2023]
Abstract
Methylenetetrahydrofolate reductase (MTHFR) and methionine synthase reductase (MTRR), riboflavin-dependent enzymes, participate in homocysteine metabolism. Reported effects of riboflavin status on the association between the MTHFR 677C>T polymorphism and homocysteine vary, and the effects of the MTRR 66A>G or MTRR 524C>T polymorphisms on homocysteine are unclear. We tested the hypothesis that the effects of the MTHFR 677C>T, MTRR 66A>G and MTRR 524C>T polymorphisms on fasting plasma total homocysteine (tHcy) depend on riboflavin status (erythrocyte glutathionine reductase activation coefficient, optimum: <1.2; marginally deficient: 1.2-1.4; deficient: ≥1.4) in 771 adults aged 18-75 years. MTHFR 677T allele carriers with middle or low tertile plasma folate (<14.7 nmol/L) had 8.2 % higher tHcy compared to the 677CC genotype (p < 0.01). This effect was eliminated when riboflavin status was optimal (p for interaction: 0.048). In the lowest cobalamin quartile (≤273 pmol/L), riboflavin status modifies the relationship between the MTRR 66 A>G polymorphism and tHcy (p for interaction: 0.034). tHcy was 6.6 % higher in MTRR 66G allele carriers compared to the 66AA genotype with marginally deficient or optimal riboflavin status, but there was no difference when riboflavin status was deficient (p for interaction: 0.059). tHcy was 13.7 % higher in MTRR 524T allele carriers compared to the 524CC genotype when cobalamin status was low (p < 0.01), but no difference was observed when we stratified by riboflavin status. The effect of the MTHFR 677C>T polymorphism on tHcy depends on riboflavin status, that of the MTRR 66A>G polymorphism on cobalamin and riboflavin status and that of the MTRR 524C>T polymorphism on cobalamin status.
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Nitter M, Norgård B, de Vogel S, Eussen SJPM, Meyer K, Ulvik A, Ueland PM, Nygård O, Vollset SE, Bjørge T, Tjønneland A, Hansen L, Boutron-Ruault M, Racine A, Cottet V, Kaaks R, Kühn T, Trichopoulou A, Bamia C, Naska A, Grioni S, Palli D, Panico S, Tumino R, Vineis P, Bueno-de-Mesquita HB, van Kranen H, Peeters PH, Weiderpass E, Dorronsoro M, Jakszyn P, Sánchez M, Argüelles M, Huerta JM, Barricarte A, Johansson M, Ljuslinder I, Khaw K, Wareham N, Freisling H, Duarte-Salles T, Stepien M, Gunter MJ, Riboli E. Plasma methionine, choline, betaine, and dimethylglycine in relation to colorectal cancer risk in the European Prospective Investigation into Cancer and Nutrition (EPIC). Ann Oncol 2014; 25:1609-15. [PMID: 24827130 DOI: 10.1093/annonc/mdu185] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/25/2024] Open
Abstract
BACKGROUND Disturbances in one carbon metabolism may contribute to carcinogenesis by affecting methylation and synthesis of DNA. Choline and its oxidation product betaine are involved in this metabolism and can serve as alternative methyl group donors when folate status is low. PATIENTS AND METHODS We conducted a case-control study nested within the European Prospective Investigation into Cancer and Nutrition (EPIC), to investigate plasma concentrations of the methyl donors methionine, choline, betaine (trimethylglycine), and dimethylglycine (DMG) in relation to colorectal cancer (CRC) risk. Our study included 1367 incident CRC cases (965 colon and 402 rectum) and 2323 controls matched by gender, age group, and study center. Multivariate-adjusted odds ratios (ORs) and 95% confidence intervals (95% CIs) for CRC risk were estimated by conditional logistic regression, comparing the fifth to the first quintile of plasma concentrations. RESULTS Overall, methionine (OR: 0.79, 95% CI: 0.63-0.99, P-trend = 0.05), choline (OR: 0.77, 95% CI: 0.60-0.99, P-trend = 0.07), and betaine (OR: 0.85, 95% CI: 0.66-1.09, P-trend = 0.06) concentrations were inversely associated with CRC risk of borderline significance. In participants with folate concentration below the median of 11.3 nmol/l, high betaine concentration was associated with reduced CRC risk (OR: 0.71, 95% CI: 0.50-1.00, P-trend = 0.02), which was not observed for those having a higher folate status. Among women, but not men, high choline concentration was associated with decreased CRC risk (OR: 0.62, 95% CI: 0.43-0.88, P-trend = 0.01). Plasma DMG was not associated with CRC risk. CONCLUSIONS Individuals with high plasma concentrations of methionine, choline, and betaine may be at reduced risk of CRC.
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Affiliation(s)
- M Nitter
- Departments of Global Public Health and Primary Care
| | - B Norgård
- Departments of Global Public Health and Primary Care
| | - S de Vogel
- Departments of Global Public Health and Primary Care
| | - S J P M Eussen
- Departments of Global Public Health and Primary Care Clinical Science, Section for Pharmacology, University of Bergen, Bergen, Norway Department of Epidemiology, School for Public Health and Primary Care, CAPHRI, Maastricht University, Maastricht, The Netherlands
| | | | | | - P M Ueland
- Clinical Science, Section for Pharmacology, University of Bergen, Bergen, Norway Laboratory of Clinical Biochemistry, Haukeland University Hospital, Bergen
| | - O Nygård
- Departments of Clinical Science, Section of Cardiology, University of Bergen, Bergen Heart Disease, Haukeland University Hospital, Bergen
| | - S E Vollset
- Departments of Global Public Health and Primary Care Norwegian Institute of Public Health, Bergen, Norway
| | - T Bjørge
- Departments of Global Public Health and Primary Care Norwegian Institute of Public Health, Bergen, Norway
| | - A Tjønneland
- Institute of Cancer Epidemiology, Danish Cancer Society, Copenhagen, Denmark
| | - L Hansen
- Institute of Cancer Epidemiology, Danish Cancer Society, Copenhagen, Denmark
| | - M Boutron-Ruault
- INSERM, Centre for Research in Epidemiology and Population Health (CESP), Nutrition, Hormones and Women's Health Team, Villejuif Paris South University, Villejuif IGR, Villejuif
| | - A Racine
- INSERM, Centre for Research in Epidemiology and Population Health (CESP), Nutrition, Hormones and Women's Health Team, Villejuif Paris South University, Villejuif IGR, Villejuif
| | - V Cottet
- INSERM, Research Centre 'Lipids, Nutrition, Cancer', Dijon, France
| | - R Kaaks
- German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - T Kühn
- German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - A Trichopoulou
- Hellenic Health Foundation, Athens WHO Collaborating Center for Food and Nutrition Policies, Department of Hygiene, Epidemiology and Medical Statistics, University of Athens Medical School, Athens, Greece
| | - C Bamia
- Hellenic Health Foundation, Athens WHO Collaborating Center for Food and Nutrition Policies, Department of Hygiene, Epidemiology and Medical Statistics, University of Athens Medical School, Athens, Greece
| | - A Naska
- Hellenic Health Foundation, Athens WHO Collaborating Center for Food and Nutrition Policies, Department of Hygiene, Epidemiology and Medical Statistics, University of Athens Medical School, Athens, Greece
| | - S Grioni
- Epidemiology and Prevention Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milano
| | - D Palli
- Molecular and Nutritional Epidemiology Unit, Cancer Research and Prevention Institute-ISPO, Florence
| | - S Panico
- Dipartimento di Medicina Clinica e Chirurgia, Federico II University, Naples
| | - R Tumino
- Cancer Registry and Histopathology Unit, 'Civile - M.P. Arezzo' Hospital, ASP, Ragusa
| | - P Vineis
- School of Public Health and HuGeF Foundation, Torino, Italy The School of Public Health, Imperial College London, London, UK
| | - H B Bueno-de-Mesquita
- The School of Public Health, Imperial College London, London, UK National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands Department of Gastroenterology and Hepatology
| | - H van Kranen
- National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | - P H Peeters
- The School of Public Health, Imperial College London, London, UK Julius Center for Health Sciences and Primary Care, University Medical Center, Utrecht, The Netherlands
| | - E Weiderpass
- Department of Community Medicine, Faculty of Health Sciences, UIT The Arctic University of Norway, Tromsø Department of Research, Cancer Registry of Norway, Oslo, Norway Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden Department of Genetic Epidemiology, Samfundet Folkhälsan, Helsinki, Finland
| | - M Dorronsoro
- Basque Regional Health Department, Public Health Direction and Biodonostia Research Institute (CIBERESP), San Sebastian
| | - P Jakszyn
- Unit of Nutrition, Environment and Cancer, Cancer Epidemiology Research Program, Catalan Institute of Oncology, Barcelona
| | - M Sánchez
- Andalusian School of Public Health, Granada CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid Instituto de Investigación Biosanitaria de Granada (Granada.ibs), Granada
| | | | - J M Huerta
- CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid Department of Epidemiology, Regional Health Council, Murcia
| | - A Barricarte
- Public Health Institute of Navarra, Pamplona Consortium for Biomedical Research in Epidemiology and Public Health, Madrid, Spain
| | - M Johansson
- Department of Biobank Research, Umeå University, Umeå, Sweden International Agency for Research on Cancer (IARC-WHO), Lyon, France
| | - I Ljuslinder
- Department of Radiation Sciences, Oncology, University of Umeå, Umeå, Sweden
| | - K Khaw
- University of Cambridge School of Clinical Medicine, Cambridge
| | - N Wareham
- MRC Epidemiology Unit, University of Cambridge, Cambridge, UK
| | - H Freisling
- International Agency for Research on Cancer (IARC-WHO), Lyon, France
| | - T Duarte-Salles
- International Agency for Research on Cancer (IARC-WHO), Lyon, France
| | - M Stepien
- International Agency for Research on Cancer (IARC-WHO), Lyon, France
| | - M J Gunter
- The School of Public Health, Imperial College London, London, UK
| | - E Riboli
- The School of Public Health, Imperial College London, London, UK
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Apalset EM, Gjesdal CG, Ueland PM, Øyen J, Meyer K, Midttun Ø, Eide GE, Tell GS. Interferon gamma (IFN-γ)-mediated inflammation and the kynurenine pathway in relation to risk of hip fractures: the Hordaland Health Study. Osteoporos Int 2014; 25:2067-75. [PMID: 24817202 PMCID: PMC4099528 DOI: 10.1007/s00198-014-2720-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Accepted: 04/14/2014] [Indexed: 01/19/2023]
Abstract
UNLABELLED The cytokine interferon gamma (IFN-γ) stimulates neopterin release and tryptophan degradation into kynurenines through the kynurenine pathway. High levels of neopterin were associated with increased hip fracture risk, as were some of the kynurenines, suggesting a role of IFN-γ-mediated inflammation in the processes leading to hip fracture. INTRODUCTION Low-grade systemic inflammation has been associated with bone loss and risk of fractures. Interferon gamma (IFN-γ) initiates macrophage release of neopterin and also stimulates degradation of tryptophan along the kynurenine pathway as part of cell-mediated immune activation. Plasma neopterin and the kynurenine/tryptophan ratio (KTR) are thus markers of IFN-γ-mediated inflammation. Risk of hip fracture was investigated in relation to markers of inflammation and metabolites in the kynurenine pathway (kynurenines). METHODS Participants (71 to 74 years, N = 3,311) in the community-based Hordaland Health Study (HUSK) were followed for hip fractures from enrolment (1998-2000) until 31 December 2009. Plasma C-reactive protein (CRP), neopterin, KTR, and six kynurenines were investigated as predictors of hip fracture, using Cox proportional hazards regression analyses. RESULTS A hazard ratio (HR) of 1.9 (95% confidence interval (CI) 1.3-2.7) for hip fracture was found in the highest compared to the lowest quartile of neopterin (p trend across quartiles <0.001). CRP and KTR were not related to hip fracture risk. Among the kynurenines, a higher risk of fracture was found in the highest compared to the lowest quartiles of anthranilic acid and 3-hydroxykynurenine. For subjects in the highest quartiles of neopterin, CRP, and KTR compared to those in no top quartiles, HR was 2.5 (95% CI 1.6-4.0). CONCLUSIONS This may indicate a role for low-grade immune activation in the pathogenic processes leading to hip fracture.
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Affiliation(s)
- E. M. Apalset
- Department of Global Public Health and Primary Care, University of Bergen, Kalfarveien 31, 5018 Bergen, Norway
- Department of Rheumatology, Haukeland University Hospital, Bergen, Norway
| | - C. G. Gjesdal
- Department of Rheumatology, Haukeland University Hospital, Bergen, Norway
- Department of Clinical Science, University of Bergen, Bergen, Norway
| | - P. M. Ueland
- Department of Clinical Science, University of Bergen, Bergen, Norway
- Laboratory of Clinical Biochemistry, Haukeland University Hospital, Bergen, Norway
| | - J. Øyen
- Department of Global Public Health and Primary Care, University of Bergen, Kalfarveien 31, 5018 Bergen, Norway
- Department of Rheumatology, Haukeland University Hospital, Bergen, Norway
| | - K. Meyer
- Bevital A/S, Laboratoriebygget, Bergen, Norway
| | - Ø. Midttun
- Bevital A/S, Laboratoriebygget, Bergen, Norway
| | - G. E. Eide
- Department of Global Public Health and Primary Care, University of Bergen, Kalfarveien 31, 5018 Bergen, Norway
- Centre for Clinical Research, Haukeland University Hospital, Bergen, Norway
| | - G. S. Tell
- Department of Global Public Health and Primary Care, University of Bergen, Kalfarveien 31, 5018 Bergen, Norway
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Gylling B, Van Guelpen B, Schneede J, Hultdin J, Ueland PM, Hallmans G, Johansson I, Palmqvist R. Low folate levels are associated with reduced risk of colorectal cancer in a population with low folate status. Cancer Epidemiol Biomarkers Prev 2014; 23:2136-44. [PMID: 25063522 DOI: 10.1158/1055-9965.epi-13-1352] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND A diet rich in folate is associated with a reduced colorectal cancer risk, whereas the role of circulating levels is less clear. The aim of this study was to relate prediagnostic plasma folate, vitamin B12, and homocysteine concentrations to the risk of colorectal cancer. METHODS This was a prospective case-control study of 331 cases and 662 matched controls nested within the population-based Northern Sweden Health and Disease Study. Median follow-up time from recruitment to diagnosis was 10.8 years. RESULTS Plasma folate concentrations were positively related to colorectal cancer risk; multivariate odds ratios were 1.62 [95% confidence intervals (CI), 1.08-2.42] and 1.42 (95% CI, 0.94-2.21) for the middle and highest versus lowest tertile, respectively. In subjects with follow-up <10.8 years, a statistically significant doubled risk was observed for the middle and highest versus lowest tertile, whereas findings for longer follow-up times were null. A positive risk relationship was also observed for tumor stage III-IV but not I-II. Plasma vitamin B12 concentrations were inversely associated with rectal cancer risk. Homocysteine was not significantly related to colorectal cancer risk. CONCLUSIONS In this population-based, nested case-control study, low plasma folate concentrations were associated with a reduced colorectal cancer risk. This protective role was mainly observed in subjects with higher tumor stage or shorter follow-up time between recruitment and diagnosis. Low circulating folate status may protect against colorectal cancer or suppress progression of preneoplastic or neoplastic lesions. IMPACT These findings may have relevance for the ongoing debate about mandatory folic acid fortification of flour.
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Affiliation(s)
- Björn Gylling
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden
| | | | - Jörn Schneede
- Department of Clinical Pharmacology, Pharmacology and Clinical Neurosciences, Umeå University, Umeå, Sweden
| | - Johan Hultdin
- Department of Medical Biosciences, Clinical Chemistry, Umeå University, Umeå, Sweden
| | - Per Magne Ueland
- Department of Clinical Science, Pharmacology, University of Bergen, Bergen, Norway
| | - Göran Hallmans
- Department of Biobank Research, Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
| | | | - Richard Palmqvist
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden.
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Ulvik A, Midttun Ø, Pedersen ER, Eussen SJ, Nygård O, Ueland PM. Evidence for increased catabolism of vitamin B-6 during systemic inflammation. Am J Clin Nutr 2014; 100:250-5. [PMID: 24808485 DOI: 10.3945/ajcn.114.083196] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Plasma concentrations of PL 5'-phosphate (PLP), which is the active coenzyme form of vitamin B-6, are reduced during inflammation. The underlying mechanisms may include altered tissue distribution or increased catabolism via pyridoxal (PL) to pyridoxic acid (PA). Recently, we showed that catabolic enzyme activity could be assessed by substrate product ratios measured in plasma. OBJECTIVE We evaluated the ratios PA:PL, PA:PLP, and PA:(PL + PLP) as possible markers of vitamin B-6 catabolism. DESIGN Cross-sectional and longitudinal data were derived from the Western Norway B-Vitamin Intervention Trial. We analyzed associations of ratios with inflammatory markers and other clinical variables by using multiple linear regression and partial correlation. In addition, intraclass correlation coefficients (ICCs) were used to assess the ability of plasma indexes to differentiate between subjects. RESULTS PA:(PL + PLP) had the highest ICC of all vitamin B-6 metabolites and ratios tested. In regression models, the inflammatory markers C-reactive protein, white blood cell count, neopterin, and kynurenine:tryptophan collectively accounted for 28% of the total and > 90% of the explained variation in PA:(PL + PLP). For individual B-6 metabolites, corresponding numbers were 19-25% and 20-44%, respectively, with vitamin supplement intake, smoking, and kidney function (estimated glomerular filtration rate) as additional predictors. In an analysis of receiver operating characteristics, PA:(PL + PLP) discriminated high inflammatory concentrations with an area under the curve (95% CI) of 0.85 (0.81, 0.89). CONCLUSIONS Broad-specificity enzymes upregulated to reduce oxidative and aldehyde stress could explain increased catabolism of vitamin B-6 during inflammation. The ratio PA:(PL + PLP) may provide novel insights into pathologic processes and potentially predict risk of future disease.
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Affiliation(s)
- Arve Ulvik
- From Bevital A/S, Laboratoriebygget, Bergen, Norway (AU and ØM); the Section for Cardiology (ERP and ON), Department of Clinical Science (SJPME and PMU), University of Bergen, Bergen, Norway; the Department of Heart Disease (ON) and the Laboratory of Clinical Biochemistry (PMU), Haukeland University Hospital, Bergen, Norway (ON); and the Department of Epidemiology, School for Public Health and Primary Care, Maastricht University, Maastricht, Netherlands (SJPME)
| | - Øivind Midttun
- From Bevital A/S, Laboratoriebygget, Bergen, Norway (AU and ØM); the Section for Cardiology (ERP and ON), Department of Clinical Science (SJPME and PMU), University of Bergen, Bergen, Norway; the Department of Heart Disease (ON) and the Laboratory of Clinical Biochemistry (PMU), Haukeland University Hospital, Bergen, Norway (ON); and the Department of Epidemiology, School for Public Health and Primary Care, Maastricht University, Maastricht, Netherlands (SJPME)
| | - Eva R Pedersen
- From Bevital A/S, Laboratoriebygget, Bergen, Norway (AU and ØM); the Section for Cardiology (ERP and ON), Department of Clinical Science (SJPME and PMU), University of Bergen, Bergen, Norway; the Department of Heart Disease (ON) and the Laboratory of Clinical Biochemistry (PMU), Haukeland University Hospital, Bergen, Norway (ON); and the Department of Epidemiology, School for Public Health and Primary Care, Maastricht University, Maastricht, Netherlands (SJPME)
| | - Simone Jpm Eussen
- From Bevital A/S, Laboratoriebygget, Bergen, Norway (AU and ØM); the Section for Cardiology (ERP and ON), Department of Clinical Science (SJPME and PMU), University of Bergen, Bergen, Norway; the Department of Heart Disease (ON) and the Laboratory of Clinical Biochemistry (PMU), Haukeland University Hospital, Bergen, Norway (ON); and the Department of Epidemiology, School for Public Health and Primary Care, Maastricht University, Maastricht, Netherlands (SJPME)
| | - Ottar Nygård
- From Bevital A/S, Laboratoriebygget, Bergen, Norway (AU and ØM); the Section for Cardiology (ERP and ON), Department of Clinical Science (SJPME and PMU), University of Bergen, Bergen, Norway; the Department of Heart Disease (ON) and the Laboratory of Clinical Biochemistry (PMU), Haukeland University Hospital, Bergen, Norway (ON); and the Department of Epidemiology, School for Public Health and Primary Care, Maastricht University, Maastricht, Netherlands (SJPME)
| | - Per M Ueland
- From Bevital A/S, Laboratoriebygget, Bergen, Norway (AU and ØM); the Section for Cardiology (ERP and ON), Department of Clinical Science (SJPME and PMU), University of Bergen, Bergen, Norway; the Department of Heart Disease (ON) and the Laboratory of Clinical Biochemistry (PMU), Haukeland University Hospital, Bergen, Norway (ON); and the Department of Epidemiology, School for Public Health and Primary Care, Maastricht University, Maastricht, Netherlands (SJPME)
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Cuerq C, Peretti N, Chikh K, Mialon A, Guillaumont M, Drai J, Blond E. Overview of the in vitro stability of commonly measured vitamins and carotenoids in whole blood. Ann Clin Biochem 2014; 52:259-69. [DOI: 10.1177/0004563214542471] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background The pre-analytical stabilities of vitamins A, E, K, B1, B2, B6, B12, C, carotenoids and folates in whole blood were studied. The aim of this work was to provide clear and workable pre-analytical procedures specifying optimal delay before freezing for laboratories which perform themselves such analyses or which receive and transfer such specimens to referral laboratories. Methods The stability of vitamins was studied in whole blood at room temperature after light exposure up to 24 h (vitamin C), 48 h (vitamins A, E, B1, B2, B6 and carotenoids) and 72 h (vitamins K, B12, red blood cell (RBC) and serum folates). Vitamin C stability after baseline acidification was analysed up to 48 h. Changes observed were compared to a clinical cut-off defined as total change limit based on a combination of analytical performance and within-subject variation. Results Clinically and statistically significant changes occurred only in vitamins C (−22.5%), B6 (+9.9%) and serum folates (−16.8%) concentrations after 6, 24 and 48 h, respectively. Vitamins A, E, K, B1, B2, B12, RBC folates and carotenoids showed good stability up to 48 or 72 h. Vitamin C in acidified serum conserved at room temperature appeared unstable. The optimal condition for acidified vitamin C conservation was at less than −20℃. Conclusion The majority of vitamins remain stable for up to 48 h. Vitamin C quantification requires serum acidification followed by freezing as soon as possible. Freezing, respectively, within 12 h and 24 h for determination of plasma vitamin B6 and serum folates concentrations is recommended.
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Affiliation(s)
- Charlotte Cuerq
- Biochemistry Department, Lyon Sud Hospital, Hospices Civils de Lyon, Lyon, France
- INSERM U1060, CarMeN Laboratory, Lyon 1 Claude Bernard University, Oullins, France
| | - Noël Peretti
- INSERM U1060, CarMeN Laboratory, Lyon 1 Claude Bernard University, Oullins, France
- Paediatric Nutrition Department, Hôpital Femme-Mère-Enfant, Hospices Civils de Lyon, Lyon, France
- Faculté de Médecine Lyon Est, Université Claude Bernard Lyon 1, UCBL, Lyon, France
| | - Karim Chikh
- Biochemistry Department, Lyon Sud Hospital, Hospices Civils de Lyon, Lyon, France
- INSERM U1060, CarMeN Laboratory, Lyon 1 Claude Bernard University, Oullins, France
| | - Anne Mialon
- Biochemistry Department, Lyon Sud Hospital, Hospices Civils de Lyon, Lyon, France
| | - Marc Guillaumont
- Biochemistry Department, Lyon Sud Hospital, Hospices Civils de Lyon, Lyon, France
| | - Jocelyne Drai
- Biochemistry Department, Lyon Sud Hospital, Hospices Civils de Lyon, Lyon, France
- INSERM U1060, CarMeN Laboratory, Lyon 1 Claude Bernard University, Oullins, France
| | - Emilie Blond
- Biochemistry Department, Lyon Sud Hospital, Hospices Civils de Lyon, Lyon, France
- INSERM U1060, CarMeN Laboratory, Lyon 1 Claude Bernard University, Oullins, France
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Apalset EM, Gjesdal CG, Ueland PM, Midttun Ø, Ulvik A, Eide GE, Meyer K, Tell GS. Interferon (IFN)-γ-mediated inflammation and the kynurenine pathway in relation to bone mineral density: the Hordaland Health Study. Clin Exp Immunol 2014; 176:452-60. [PMID: 24528145 PMCID: PMC4008990 DOI: 10.1111/cei.12288] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/01/2014] [Indexed: 02/01/2023] Open
Abstract
The risk of osteoporosis increases in inflammatory disorders. In cell-mediated immune activation, interferon (IFN)-γ stimulates macrophage release of neopterin and increases the activity of indoleamine 2,3-dioxygenase (IDO), thereby stimulating tryptophan degradation along the kynurenine pathway. Plasma levels of neopterin and the kynurenine/tryptophan ratio (KTR) are thus markers of IFN-γ-mediated inflammation. Several kynurenine pathway metabolites (kynurenines) possess immunomodulatory properties. The aim of this study was to investigate associations between markers of IFN-γ-mediated inflammation and kynurenines with bone mineral density (BMD). The community-based Hordaland Health Study (HUSK), with middle-aged (46–49 years) and older (71–74 years) participants, was conducted from 1998 to 2000 (n = 5312). Hip BMD in relation to neopterin, KTR and kynurenines were investigated, using linear and logistic regression analyses. In the oldest group, neopterin (P ≤ 0·019) and KTR (P ≤ 0·001) were associated inversely with BMD after multiple adjustment. Comparing the highest to the lowest quartiles, the odds ratios of low BMD (being in the lowest quintile of BMD) in the oldest cohort were for neopterin 2·01 among men and 2·34 among women (P ≤ 0·007) and for KTR 1·80 for men and 2·04 for women (P ≤ 0·022). Xanthurenic acid was associated positively with BMD in all sex and age groups while 3-hydroxyanthranilic acid was associated positively with BMD among women only (P ≤ 0·010). In conclusion, we found an inverse association between BMD and markers of IFN-γ-mediated inflammation in the oldest participants. BMD was also associated with two kynurenines in both age groups. These results may support a role of cell-mediated inflammation in bone metabolism.
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Affiliation(s)
- E M Apalset
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway; Department of Rheumatology, Haukeland University Hospital, Bergen, Norway
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Focks JJ, van Schaik A, Clappers N, van Dijk EGJA, van Oijen MGH, Verheugt FWA, Peters WHM. Assessment of plasma aminothiol levels and the association with recurrent atherothrombotic events in patients hospitalized for an acute coronary syndrome: a prospective study. Clin Chem Lab Med 2014; 51:2187-93. [PMID: 23843583 DOI: 10.1515/cclm-2013-0103] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Accepted: 06/14/2013] [Indexed: 11/15/2022]
Abstract
BACKGROUND The aminothiols homocysteine and, to a lesser extent, cysteine have been associated with adverse cardiovascular outcome, whereas glutathione, as an antioxidant, may protect against atherosclerosis and thrombosis. Potentially, the combined assessment of these aminothiols may provide a more accurate association with future cardiovascular outcome. We evaluated the association between recurrent atherothrombotic events and the concentration of total plasma cysteine, homocysteine, and glutathione and their combination. METHODS Respective aminothiols were measured by high-performance liquid chromatography in blood plasma of consecutive first-day survivors admitted for an acute coronary syndrome between April 2002 and January 2004. The combined score was calculated using the combination of the individual aminothiols. The end point was the composite of cardiovascular death, myocardial infarction, and/or stroke. RESULTS A cohort of 375 consecutive patients (median age 66 years, 66% male) were followed for a median duration of 2.7 years. The end point occurred in 82 patients (22%). In univariate analyses, all aminothiols were significantly associated with the composite end point. After correction for possible confounders, only cysteine and glutathione remained significantly associated. The strongest association with the end point was observed for the combined score (adjusted hazard ratio, 1.40 per standard deviation increase; p=0.005). CONCLUSIONS Although homocysteine is generally considered the aminothiol of interest with respect to cardiovascular disease, in our prospective study, only cysteine and glutathione appeared independently associated with recurrent atherothrombotic events. Moreover, we showed that an imbalance in the combination of aminothiols could be of more importance than investigating the individual metabolites.
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77
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Midttun Ø, Townsend MK, Nygård O, Tworoger SS, Brennan P, Johansson M, Ueland PM. Most blood biomarkers related to vitamin status, one-carbon metabolism, and the kynurenine pathway show adequate preanalytical stability and within-person reproducibility to allow assessment of exposure or nutritional status in healthy women and cardiovascular patients. J Nutr 2014; 144:784-90. [PMID: 24647388 PMCID: PMC3985833 DOI: 10.3945/jn.113.189738] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 01/08/2014] [Accepted: 02/24/2014] [Indexed: 01/20/2023] Open
Abstract
Knowledge of stability during sample transportation and changes in biomarker concentrations within person over time are paramount for proper design and interpretation of epidemiologic studies based on a single measurement of biomarker status. Therefore, we investigated stability and intraindividual vs. interindividual variation in blood concentrations of biomarkers related to vitamin status, one-carbon metabolism, and the kynurenine pathway. Whole blood (EDTA and heparin, n = 12) was stored with an icepack for 24 or 48 h, and plasma concentrations of 38 biomarkers were determined. Stability was calculated as change per hour, intraclass correlation coefficient (ICC), and simple Spearman correlation. Within-person reproducibility of biomarkers was expressed as ICC in samples collected 1-2 y apart from 40 postmenopausal women and in samples collected up to 3 y apart from 551 patients with stable angina pectoris. Biomarker stability was similar in EDTA and heparin blood. Most biomarkers were essentially stable, except for choline and total homocysteine (tHcy), which increased markedly. Within-person reproducibility in postmenopausal women was excellent (ICC > 0.75) for cotinine, all-trans retinol, cobalamin, riboflavin, α-tocopherol, Gly, pyridoxal, methylmalonic acid, creatinine, pyridoxal 5'-phosphate, and Ser; was good to fair (ICC of 0.74-0.40) for pyridoxic acid, kynurenine, tHcy, cholecalciferol, flavin mononucleotide, kynurenic acid, xanthurenic acid, 3-hydroxykynurenine, sarcosine, anthranilic acid, cystathionine, homoarginine, 3-hydroxyanthranilic acid, betaine, Arg, folate, total cysteine, dimethylglycine, asymmetric dimethylarginine, neopterin, symmetric dimethylarginine, and Trp; and poor (ICC of 0.39-0.15) for methionine sulfoxide, Met, choline, and trimethyllysine. Similar reproducibilities were observed in patients with coronary heart disease. Thus, most biomarkers investigated were essentially stable in cooled whole blood for up to 48 h and had a sufficient within-person reproducibility to allow one-exposure assessment of biomarker status in epidemiologic studies. The Western Norway B Vitamin Intervention Trial was registered at clinicaltrials.gov as NTC00354081.
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Affiliation(s)
| | - Mary K. Townsend
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA
| | - Ottar Nygård
- Department of Clinical Science, University of Bergen, Bergen, Norway
- Department of Heart Disease, Haukeland University Hospital, Bergen, Norway
| | - Shelley S. Tworoger
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA
- Department of Epidemiology, Harvard School of Public Health, Boston, MA
| | - Paul Brennan
- International Agency for Research on Cancer, Lyon, France; and
| | | | - Per Magne Ueland
- Department of Clinical Science, University of Bergen, Bergen, Norway
- Laboratory of Clinical Biochemistry, Haukeland University Hospital, Bergen, Norway
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78
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Hafner F, Kieninger A, Meinitzer A, Gary T, Froehlich H, Haas E, Hackl G, Eller P, Brodmann M, Seinost G. Endothelial dysfunction and brachial intima-media thickness: long term cardiovascular risk with claudication related to peripheral arterial disease: a prospective analysis. PLoS One 2014; 9:e93357. [PMID: 24740106 PMCID: PMC3989175 DOI: 10.1371/journal.pone.0093357] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Accepted: 03/04/2014] [Indexed: 01/14/2023] Open
Abstract
Objective Endothelial dysfunction plays a key role in the development, progression, and clinical manifestation of atherosclerosis, and in symptomatic peripheral arterial disease, endothelial dysfunction and enlarged intima-media thickness might be associated with increased cardiovascular risk. Flow-mediated dilatation and serologic parameters are used to evaluate individual endothelial function. Brachial intima-media thickness, a less recognized parameter of cardiovascular risk, is independently associated with coronary artery disease. The aim of this study was to evaluate the prognostic value of ultrasound and serologic parameters of endothelial function in relation to cardiovascular mortality in peripheral arterial disease. Design monocentric, prospective cohort study. Methods Flow mediated dilatation and brachial intima-media thickness were assessed in 184 (124 male) patients with peripheral arterial disease (Rutherford stages 2–3). Serologic parameters of endothelial function included asymmetric dimethylarginine (ADMA), symmetric dimethylarginine (SDMA), and L-homoarginine. Cardiovascular events were recorded during a follow-up of 99.1±11.1 months. Subjects who died of noncardiovascular causes were excluded from further analysis. Results Eighty-two patients (44.6%) died during follow-up after a mean duration of 49.7±28.3 months. There were 49 cardiovascular deaths (59.8%) and 33 other deaths (40.2%). Flow mediated dilatation was associated with cardiovascular death [1.17% (0.0, 4.3) vs. 4.1% (1.2, 6.4), p<0.001]. Intima-media thickness was greater in patients who succumbed to cardiovascular disease [0.37 mm (0.30, 0.41)] than in survivors [0.21 mm (0.15, 0.38), p<0.001]. Brachial intima-media thickness above 0.345 mm was most predictive of cardiovascular death, with sensitivity and specificity values of 0.714 and 0.657, respectively (p<0.001). Furthermore, ADMA levels above 0.745 µmol/l and SDMA levels above 0.825 µmol/l were significantly associated with cardiovascular death (p<0.001 and 0.030). Conclusion In symptomatic peripheral arterial disease, decreased flow mediated dilatation, enlarged intima-media thickness, and elevated levels of ADMA and SDMA were associated with increased cardiovascular risk.
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Affiliation(s)
- Franz Hafner
- Department of Internal Medicine, Division of Angiology, Medical University of Graz, Graz, Austria
| | - Andrea Kieninger
- Department of Internal Medicine, Division of Angiology, Medical University of Graz, Graz, Austria
| | - Andreas Meinitzer
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
| | - Thomas Gary
- Department of Internal Medicine, Division of Angiology, Medical University of Graz, Graz, Austria
| | - Harald Froehlich
- Department of Internal Medicine, Division of Angiology, Medical University of Graz, Graz, Austria
| | - Elke Haas
- Department of Internal Medicine, Division of Angiology, Medical University of Graz, Graz, Austria
| | - Gerald Hackl
- Department of Internal Medicine, Division of Angiology, Medical University of Graz, Graz, Austria
| | - Philipp Eller
- Department of Internal Medicine, Division of Angiology, Medical University of Graz, Graz, Austria
| | - Marianne Brodmann
- Department of Internal Medicine, Division of Angiology, Medical University of Graz, Graz, Austria
- * E-mail:
| | - Gerald Seinost
- Department of Internal Medicine, Division of Angiology, Medical University of Graz, Graz, Austria
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79
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Svingen GFT, Schartum-Hansen H, Ueland PM, Pedersen ER, Seifert R, Ebbing M, Bønaa KH, Mellgren G, Nilsen DWT, Nordrehaug JE, Øyen J, Nygård O. Elevated plasma dimethylglycine is a risk marker of mortality in patients with coronary heart disease. Eur J Prev Cardiol 2014; 22:743-52. [DOI: 10.1177/2047487314529351] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Accepted: 03/04/2014] [Indexed: 11/17/2022]
Affiliation(s)
- Gard FT Svingen
- Department of Clinical Science, University of Bergen, Norway
| | - Hall Schartum-Hansen
- Department of Clinical Science, University of Bergen, Norway
- Department of Heart Disease, Haukeland University Hospital, Bergen, Norway
| | - Per M Ueland
- Department of Clinical Science, University of Bergen, Norway
- Laboratory of Clinical Biochemistry, Haukeland University Hospital, Bergen, Norway
| | - Eva R Pedersen
- Department of Clinical Science, University of Bergen, Norway
| | - Reinhard Seifert
- Department of Heart Disease, Haukeland University Hospital, Bergen, Norway
| | - Marta Ebbing
- Norwegian Cardiovascular Disease Registry, Norwegian Institute of Public Health, Norway
| | - Kaare H Bønaa
- Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway
| | - Gunnar Mellgren
- Department of Clinical Science, University of Bergen, Norway
- Hormone Laboratory, Haukeland University Hospital, Bergen, Norway
- KG Jebsen Centre for Diabetes Research, Bergen, Norway
| | - Dennis WT Nilsen
- Department of Clinical Science, University of Bergen, Norway
- Department of Cardiology, Stavanger University Hospital, Norway
| | | | - Jannike Øyen
- Department of Rheumatology, Haukeland University Hospital, Bergen, Norway
- Department of Global Public Health and Primary Care, University of Bergen, Norway
| | - Ottar Nygård
- Department of Clinical Science, University of Bergen, Norway
- Department of Heart Disease, Haukeland University Hospital, Bergen, Norway
- KG Jebsen Centre for Diabetes Research, Bergen, Norway
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80
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Chuang SC, Fanidi A, Ueland PM, Relton C, Midttun O, Vollset SE, Gunter MJ, Seckl MJ, Travis RC, Wareham N, Trichopoulou A, Lagiou P, Trichopoulos D, Peeters PHM, Bueno-de-Mesquita HB, Boeing H, Wientzek A, Kuehn T, Kaaks R, Tumino R, Agnoli C, Palli D, Naccarati A, Aicua EA, Sánchez MJ, Quirós JR, Chirlaque MD, Agudo A, Johansson M, Grankvist K, Boutron-Ruault MC, Clavel-Chapelon F, Fagherazzi G, Weiderpass E, Riboli E, Brennan PJ, Vineis P, Johansson M. Circulating biomarkers of tryptophan and the kynurenine pathway and lung cancer risk. Cancer Epidemiol Biomarkers Prev 2014; 23:461-8. [PMID: 24357106 DOI: 10.1158/1055-9965.epi-13-0770] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Imbalances in tryptophan metabolism have been linked to cancer-related immune escape and implicated in several cancers, including lung cancer. METHODS We conducted a nested case-control study within the European Prospective Investigation into Cancer and Nutrition (EPIC) that included 893 incident lung cancer cases and 1,748 matched controls. Circulating levels of tryptophan and six of its metabolites were measured and evaluated in relation to lung cancer risk. RESULTS Tryptophan (Ptrend = 2 × 10(-5)) and the kynurenine/tryptophan ratio (KTR; Ptrend = 4 × 10(-5)) were associated with lung cancer risk overall after adjusting for established risk factors. The ORs comparing the fifth and first quintiles (OR5th vs. 1st) were 0.52 [95% confidence interval (CI), 0.37-0.74] for tryptophan and 1.74 (95% CI, 1.24-2.45) for KTR. After adjusting for plasma methionine (available from previous work, which was strongly correlated with tryptophan), the associations of tryptophan (adjusted Ptrend = 0.13) and KTR (Ptrend = 0.009) were substantially attenuated. KTR was positively associated with squamous cell carcinoma, the OR5th vs. 1st being 2.83 (95% CI, 1.62-4.94, Ptrend = 3 × 10(-5)) that was only marginally affected by adjusting for methionine. CONCLUSIONS This study indicates that biomarkers of tryptophan metabolism are associated with subsequent lung cancer risk. Although this result would seem consistent with the immune system having a role in lung cancer development, the overall associations were dependent on methionine, and further studies are warranted to further elucidate the importance of these metabolites in lung cancer etiology. IMPACT This is the first prospective study investigating the tryptophan pathway in relation to lung cancer risk.
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Affiliation(s)
- Shu-Chun Chuang
- Authors' Affiliations: School of Public Health; Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, London; Institute for Ageing and Health, Newcastle University, Newcastle; Cancer Epidemiology Unit, Nuffield Department of Clinical Medicine, University of Oxford, Oxford; Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom; International Agency for Research on Cancer, Lyon; Inserm U1018, Centre for Research in Epidemiology and Population Health (CESP); University Paris Sud, UMRS 1018; IGR, Villejuif, France; Section of Pharmacology, Institute of Medicine; Department of Public Health and Primary Health Care, University of Bergen; Laboratory of Clinical Biochemistry, Haukeland University Hospital; Bevital AS; Division of Epidemiology, Norwegian Institute of Public Health, Bergen; Department of Community Medicine, Faculty of Health Sciences, University of Tromsø, Tromsø, Norway; WHO Collaborating Center for Food and Nutrition Policies, Department of Hygiene, Epidemiology and Medical Statistics, University of Athens Medical School; Bureau of Epidemiologic Research, Academy of Athens; Hellenic Health Foundation, Athens, Greece; Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts; Department of Epidemiology, Julius Center for Health Sciences and Primary Care, University Medical Center; Department of Gastroenterology and Hepatology, University Medical Centre, Utrecht; National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands; Department of Epidemiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal; Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany; Cancer Registry and Histopathology Unit, "Civile M.P.Arezzo" Hospital, ASP Ragusa; Nutritional Epidemiology Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan; Molecular and Nutritional Epidemiology Unit, Cancer Research an
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81
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Shaw GM, Yang W, Carmichael SL, Vollset SE, Hobbs CA, Lammer EJ, Ueland PM. One-carbon metabolite levels in mid-pregnancy and risks of conotruncal heart defects. ACTA ACUST UNITED AC 2014; 100:107-15. [PMID: 24532477 DOI: 10.1002/bdra.23224] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Revised: 12/20/2013] [Accepted: 01/13/2014] [Indexed: 11/07/2022]
Abstract
BACKGROUND Evidence exists for an association between use of vitamin supplements with folic acid in early pregnancy and reduced risk for offspring with conotruncal heart defects. A few observations have been made about nutrients related to one-carbon metabolism other than folate. Our prospective study attempted to extend information on nutrition and conotruncal heart defects by measuring analytes in mid-pregnancy sera. METHODS This study included data from a repository of women's mid-pregnancy serum specimens based on screened pregnancies in California from 2002-2007. Each woman's specimen was linked with delivery information to determine whether her fetus had a conotruncal heart defect or another structural malformation, or was nonmalformed. We identified 140 conotruncal cases and randomly selected 280 specimens as nonmalformed controls. Specimens were tested for a variety of analytes, including homocysteine, methylmalonic acid, folate, vitamin B12 , pyridoxal phosphate, pyridoxal, pyridoxic acid, riboflavin, total choline, betaine, methionine, cysteine, cystathionine, arginine, asymmetric and symmetric dimethylarginine. RESULTS AND CONCLUSIONS We did not observe statistical evidence for substantial differences between cases and controls for any of the measured analytes. Analyses specifically targeting B-vitamins also did not reveal differences between cases and controls.
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Affiliation(s)
- Gary M Shaw
- Department of Pediatrics, Stanford University School of Medicine, Stanford, California
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82
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Pinto J, Domingues MRM, Galhano E, Pita C, Almeida MDC, Carreira IM, Gil AM. Human plasma stability during handling and storage: impact on NMR metabolomics. Analyst 2014; 139:1168-77. [DOI: 10.1039/c3an02188b] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The stability of human plasma composition was investigated by NMR, considering different collection tubes, time at room temperature (RT), short- and long-term storage conditions and up to 5 consecutive freeze–thaw cycles.
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Affiliation(s)
- Joana Pinto
- CICECO – Department of Chemistry
- Campus Universitário de Santiago
- Universidade de Aveiro
- 3810-193 Aveiro, Portugal
| | - M. Rosário M. Domingues
- QOPNA – Department of Chemistry
- Campus Universitário de Santiago
- University of Aveiro
- 3810-193 Aveiro, Portugal
| | - Eulália Galhano
- Maternidade Bissaya Barreto
- Centro Hospitalar e Universitário de Coimbra – CHUC
- 3000 Coimbra, Portugal
| | - Cristina Pita
- Maternidade Bissaya Barreto
- Centro Hospitalar e Universitário de Coimbra – CHUC
- 3000 Coimbra, Portugal
| | - Maria do Céu Almeida
- Maternidade Bissaya Barreto
- Centro Hospitalar e Universitário de Coimbra – CHUC
- 3000 Coimbra, Portugal
| | - Isabel M. Carreira
- Cytogenetics and Genomics Laboratory
- Faculty of Medicine
- University of Coimbra
- Portugal
- CIMAGO Center for Research in Environment, Genetics and Oncobiology
| | - Ana M. Gil
- CICECO – Department of Chemistry
- Campus Universitário de Santiago
- Universidade de Aveiro
- 3810-193 Aveiro, Portugal
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83
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Ulvik A, Theofylaktopoulou D, Midttun Ø, Nygård O, Eussen SJPM, Ueland PM. Substrate product ratios of enzymes in the kynurenine pathway measured in plasma as indicators of functional vitamin B-6 status. Am J Clin Nutr 2013; 98:934-40. [PMID: 24004893 DOI: 10.3945/ajcn.113.064998] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Tryptophan metabolism through the kynurenine pathway includes 2 vitamin B-6 [pyridoxal 5'-phosphate (PLP)]-dependent enzymes. We recently showed that plasma 3-hydroxykynurenine (HK) was elevated at low PLP concentrations. OBJECTIVE We further evaluated and characterized kynurenine-based indexes as possible markers of functional B-vitamin status in plasma. DESIGN Cross-sectional and longitudinal data were derived from the Western Norway B-vitamin Intervention Trial, including PLP, kynurenine, HK, kynurenic acid (KA), anthranilic acid, xanthurenic acid (XA), and 3-hydroxyanthranilic acid (HAA) measured in plasma at 2 time points. Partial Spearman's correlation, generalized additive models, and receiver operating characteristic (ROC) analysis were used to assess associations of kynurenines with PLP. RESULTS Ratios HK:XA, HK:HAA, and HK:KA showed markedly stronger negative correlations with PLP than did HK alone (Spearman's ρ = -0.36, -0.29, and -0.31 compared with -0.18, respectively). All associations were nonlinear, with the strongest relation at low PLP. In the ROC analysis, areas under the curve for discriminating low PLP (less than the fifth percentile; 18.6 nmol/L) were 0.78, 0.78, and 0.74, respectively, compared with 0.65 for HK. Oral treatment with 40 mg pyridoxin hydrochloride for 28 d reduced the ratios by up to 60%, with strongest reductions for subjects with low plasma PLP at baseline. Whereas HK was associated with kidney function and several inflammatory markers, such associations were abolished or attenuated for the ratios. CONCLUSION Plasma values of HK:XA and HK:HAA, which are substrate-product pairs for kynurenine transaminase and kynureninase, respectively, may reflect the intracellular availability of the cofactor (PLP) and, therefore, present as potential markers of functional vitamin B-6 status.
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Affiliation(s)
- Arve Ulvik
- Bevital A/S, Laboratoriebygget, Bergen, Norway and Laboratory of Clinical Biochemistry, Haukeland University Hospital, Bergen, Norway
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84
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de Vogel S, Meyer K, Fredriksen Å, Ulvik A, Ueland PM, Nygård O, Vollset SE, Tell GS, Tretli S, Bjørge T. Serum folate and vitamin B12 concentrations in relation to prostate cancer risk--a Norwegian population-based nested case-control study of 3000 cases and 3000 controls within the JANUS cohort. Int J Epidemiol 2013; 42:201-10. [PMID: 23508410 DOI: 10.1093/ije/dys199] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Although individual studies have been inconsistent, meta-analyses of epidemiological data suggest that high folate and vitamin B12 levels may be associated with increased prostate cancer risk. METHODS Within JANUS, a prospective cohort in Norway (n = 317 000) with baseline serum samples, we conducted a nested case-control study among 3000 prostate cancer cases and 3000 controls, matched on age and time at serum sampling, and county of residence. Using conditional logistic regression, odds ratios (OR) and 95% confidence intervals (CI) for prostate cancer risk were estimated according to quintiles of serum folate, vitamin B12, methylmalonic acid (MMA), total homocysteine (tHcy) and methionine, and according to MTHFR 677C→T genotypes. To correct for degradation during sample storage, folate concentration was measured as p-aminobenzoylglutamate (pABG) equivalents following oxidation and acid hydrolysis. RESULTS We observed a weak positive association between folate concentration and prostate cancer risk [OR highest vs lowest quintile = 1.15 (0.97-1.37), P-trend = 0.04], which was more pronounced among individuals ≥ 50 years at inclusion [OR 1.40 (1.07-1.84), P-trend = 0.02]. tHcy showed an inverse trend with risk [OR 0.92 (0.77-1.10), P-trend = 0.03]. Vitamin B12, MMA and methionine concentrations were not associated with prostate cancer risk. Compared with the MTHFR 677CC genotype, the CT and TT variants, both of which were related to lower folate concentrations, were associated with reduced prostate cancer risk [OR 0.82 (0.72-0.94) and OR 0.78 (0.64-0.94), respectively]. CONCLUSION This large-scale population-based study suggests that high serum folate concentration may be associated with modestly increased prostate cancer risk. We did not observe an association between vitamin B12 status and prostate cancer risk.
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Affiliation(s)
- Stefan de Vogel
- Department of Public Health and Primary Health Care, University of Bergen, Bergen, Norway.
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85
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Cope EL, Shrubsole MJ, Cohen SS, Cai Q, Wu J, Ueland PM, Midttun Ø, Sonderman JS, Blot WJ, Signorello LB. Intraindividual variation in one-carbon metabolism plasma biomarkers. Cancer Epidemiol Biomarkers Prev 2013; 22:1894-9. [PMID: 23950212 DOI: 10.1158/1055-9965.epi-13-0420] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Interest in the relationship between one-carbon metabolism (OCM) and carcinogenesis is intensifying, leading to increased use of related biomarkers as measures of exposure. Little is known, however, about the intraindividual variation in these markers and whether or not the use of a single measure is appropriate for assessing exposure-disease relationships in epidemiologic studies. We evaluated the intraindividual variation in plasma concentrations of 19 OCM biomarkers in a sample of 147 African American and 68 non-Hispanic white participants from the Southern Community Cohort Study who donated blood samples and responded to questionnaires at two time points from 2005 to 2008. Weighted kappa coefficients (κ) were calculated to assess the agreement between quartile assignments based on the repeated measures. Adjusted intraclass correlation coefficients (ICC) were also used to assess the consistency of the two measurements. Most (16/19) OCM biomarkers showed a moderate or better agreement for quartile assignment at the two time points, with only methionine, methionine sulfoxide, and cystathionine having κ ≤ 0.40. The median-adjusted ICC across the 19 biomarkers was 0.60. Reproducibility was highest for flavin mononucleotide [ICC = 0.84, 95% confidence interval (CI), 0.79-0.87] and lowest for methionine and its oxidative product methionine sulfoxide (ICC = 0.22, 95% CI 0.09-0.34; ICC = 0.20, 95% CI 0.07-0.32, respectively). Overall, the intraindividual variation in OCM biomarkers was similar for African Americans and whites and for males and females. Our results suggest that with the exception of methionine and methionine sulfoxide, OCM biomarkers generally have good intraindividual reproducibility and can be considered as reliable exposure measures in epidemiologic studies.
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Affiliation(s)
- Elizabeth L Cope
- Authors' Affiliations: International Epidemiology Institute, Rockville, Maryland; Division of Epidemiology, Department of Medicine; Vanderbilt-Ingram Cancer Center, Vanderbilt University, Nashville, Tennessee; Section for Pharmacology, Institute of Medicine, University of Bergen; Laboratory of Clinical Biochemistry, Haukeland University Hospital; BEVITAL, Bergen, Norway; Department of Epidemiology, Harvard School of Public Health; and Dana-Farber/Harvard Cancer Center, Boston, Massachusetts
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86
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Tveitevåg Svingen GF, Ueland PM, Pedersen EKR, Schartum-Hansen H, Seifert R, Ebbing M, Løland KH, Tell GS, Nygård O. Plasma Dimethylglycine and Risk of Incident Acute Myocardial Infarction in Patients With Stable Angina Pectoris. Arterioscler Thromb Vasc Biol 2013; 33:2041-8. [DOI: 10.1161/atvbaha.113.301714] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective—
Dimethylglycine is linked to lipid metabolism, and increased plasma levels may be associated with adverse prognosis in patients with coronary artery disease. We evaluated the relationship between plasma dimethylglycine and risk of incident acute myocardial infarction in a large prospective cohort of patients with stable angina pectoris, of whom approximately two thirds were participants in a B-vitamin intervention trial. Model discrimination and reclassification when adding plasma dimethylglycine to established risk factors were obtained. We also explored temporal changes and the test–retest reliability of plasma dimethylglycine.
Approach and Results—
Four thousand one hundred fifty patients (72% men; median age 62 years) were included. Plasma dimethylglycine was associated with several traditional coronary artery disease risk factors. During a median follow-up of 4.6 years, 343 (8.3%) patients experienced an acute myocardial infarction. The hazard ratio (95% confidence interval) for acute myocardial infarction was 1.95 (1.42–2.68;
P
<0.001) when comparing plasma dimethylglycine quartile 4 to 1 in a Cox regression model adjusted for age, sex, and fasting status. Adjusting for traditional coronary artery disease risk factors only slightly modified the estimates, which were particularly strong among nonsmokers and among patients with serum triglyceride or apolipoprotein B100 levels ≤median (
P
for interaction=0.004, 0.004, and 0.03, respectively). Plasma dimethylglycine improved discrimination and reclassification and had high test–retest reliability.
Conclusions—
Plasma dimethylglycine is independently related to incident acute myocardial infarction and enhances risk prediction in patients with stable angina pectoris. Our results motivate further studies on the relationship between 1-carbon metabolism and atherothrombosis. A potential interplay with lipid and energy metabolism merits particular attention.
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Affiliation(s)
- Gard Frodahl Tveitevåg Svingen
- From the Department of Clinical Science (G.F.T.S., E.K.R.P., P.M.U., K.H.L., O.N.), Department of Global Public Health and Primary Care (G.S.T.), University of Bergen, Bergen, Norway; Department of Heart Disease, Haukeland University Hospital, Bergen, Norway (H.S.H., R.S., O.N.); and Norwegian Cardiovascular Disease Registry, Norwegian Institute of Public Health, Oslo, Norway (M.E.)
| | - Per Magne Ueland
- From the Department of Clinical Science (G.F.T.S., E.K.R.P., P.M.U., K.H.L., O.N.), Department of Global Public Health and Primary Care (G.S.T.), University of Bergen, Bergen, Norway; Department of Heart Disease, Haukeland University Hospital, Bergen, Norway (H.S.H., R.S., O.N.); and Norwegian Cardiovascular Disease Registry, Norwegian Institute of Public Health, Oslo, Norway (M.E.)
| | - Eva Kristine Ringdal Pedersen
- From the Department of Clinical Science (G.F.T.S., E.K.R.P., P.M.U., K.H.L., O.N.), Department of Global Public Health and Primary Care (G.S.T.), University of Bergen, Bergen, Norway; Department of Heart Disease, Haukeland University Hospital, Bergen, Norway (H.S.H., R.S., O.N.); and Norwegian Cardiovascular Disease Registry, Norwegian Institute of Public Health, Oslo, Norway (M.E.)
| | - Hall Schartum-Hansen
- From the Department of Clinical Science (G.F.T.S., E.K.R.P., P.M.U., K.H.L., O.N.), Department of Global Public Health and Primary Care (G.S.T.), University of Bergen, Bergen, Norway; Department of Heart Disease, Haukeland University Hospital, Bergen, Norway (H.S.H., R.S., O.N.); and Norwegian Cardiovascular Disease Registry, Norwegian Institute of Public Health, Oslo, Norway (M.E.)
| | - Reinhard Seifert
- From the Department of Clinical Science (G.F.T.S., E.K.R.P., P.M.U., K.H.L., O.N.), Department of Global Public Health and Primary Care (G.S.T.), University of Bergen, Bergen, Norway; Department of Heart Disease, Haukeland University Hospital, Bergen, Norway (H.S.H., R.S., O.N.); and Norwegian Cardiovascular Disease Registry, Norwegian Institute of Public Health, Oslo, Norway (M.E.)
| | - Marta Ebbing
- From the Department of Clinical Science (G.F.T.S., E.K.R.P., P.M.U., K.H.L., O.N.), Department of Global Public Health and Primary Care (G.S.T.), University of Bergen, Bergen, Norway; Department of Heart Disease, Haukeland University Hospital, Bergen, Norway (H.S.H., R.S., O.N.); and Norwegian Cardiovascular Disease Registry, Norwegian Institute of Public Health, Oslo, Norway (M.E.)
| | - Kjetil Halvorsen Løland
- From the Department of Clinical Science (G.F.T.S., E.K.R.P., P.M.U., K.H.L., O.N.), Department of Global Public Health and Primary Care (G.S.T.), University of Bergen, Bergen, Norway; Department of Heart Disease, Haukeland University Hospital, Bergen, Norway (H.S.H., R.S., O.N.); and Norwegian Cardiovascular Disease Registry, Norwegian Institute of Public Health, Oslo, Norway (M.E.)
| | - Grethe S. Tell
- From the Department of Clinical Science (G.F.T.S., E.K.R.P., P.M.U., K.H.L., O.N.), Department of Global Public Health and Primary Care (G.S.T.), University of Bergen, Bergen, Norway; Department of Heart Disease, Haukeland University Hospital, Bergen, Norway (H.S.H., R.S., O.N.); and Norwegian Cardiovascular Disease Registry, Norwegian Institute of Public Health, Oslo, Norway (M.E.)
| | - Ottar Nygård
- From the Department of Clinical Science (G.F.T.S., E.K.R.P., P.M.U., K.H.L., O.N.), Department of Global Public Health and Primary Care (G.S.T.), University of Bergen, Bergen, Norway; Department of Heart Disease, Haukeland University Hospital, Bergen, Norway (H.S.H., R.S., O.N.); and Norwegian Cardiovascular Disease Registry, Norwegian Institute of Public Health, Oslo, Norway (M.E.)
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87
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de Vogel S, Ulvik A, Meyer K, Ueland PM, Nygård O, Vollset SE, Tell GS, Gregory JF, Tretli S, Bjørge T. Sarcosine and other metabolites along the choline oxidation pathway in relation to prostate cancer--a large nested case-control study within the JANUS cohort in Norway. Int J Cancer 2013; 134:197-206. [PMID: 23797698 DOI: 10.1002/ijc.28347] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Revised: 05/29/2013] [Accepted: 06/03/2013] [Indexed: 01/01/2023]
Abstract
Methyl group donors and intermediates of one-carbon metabolism affect DNA synthesis and DNA methylation, and may thereby affect prostate carcinogenesis. Choline, the precursor of betaine, and the one-carbon metabolite sarcosine have been associated with increased prostate cancer risk. Within JANUS, a prospective cohort in Norway (n = 317,000) with baseline serum samples, we conducted a nested case-control study among 3,000 prostate cancer cases and 3,000 controls. Using conditional logistic regression, odds ratios (ORs) and 95% confidence intervals (CIs) for prostate cancer risk were estimated according to quintiles of circulating betaine, dimethylglycine (DMG), sarcosine, glycine and serine. High sarcosine and glycine concentrations were associated with reduced prostate cancer risk of borderline significance (sarcosine: highest vs. lowest quintile OR = 0.86, CI = 0.72-1.01, p(trend) = 0.03; glycine: OR = 0.83, CI = 0.70-1.00, p(trend) = 0.07). Serum betaine, DMG and serine were not associated with prostate cancer risk. However, individuals with a high glycine/serine ratio were at decreased prostate cancer risk (OR = 0.74, CI = 0.69-0.85, p(trend) < 0.001). This population-based study suggested that men with high serum sarcosine or glycine concentrations have modestly reduced prostate cancer risk. Ratios of metabolites reflecting one-carbon balance may be associated with prostate cancer risk, as demonstrated for the glycine/serine ratio, and should be explored in future studies.
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Affiliation(s)
- Stefan de Vogel
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
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88
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Metformin lowers serum cobalamin without changing other markers of cobalamin status: a study on women with polycystic ovary syndrome. Nutrients 2013; 5:2475-82. [PMID: 23857221 PMCID: PMC3738982 DOI: 10.3390/nu5072475] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Revised: 06/05/2013] [Accepted: 06/07/2013] [Indexed: 01/22/2023] Open
Abstract
Treatment with the anti-diabetic drug metformin is followed by a decline in plasma cobalamin, but it is unsettled whether this denotes an impaired cobalamin status. This study has explored changes in the markers of cobalamin status in women with Polycystic Ovary Syndrome treated with metformin (1.5-2.5 g per day) (n = 29) or placebo (n = 23) for six months. Serum samples were collected before and after two, four, and six months of treatment. We found serum cobalamin to decline and reach significant lower levels after six months of treatment (p = 0.003). Despite the decline in serum cobalamin, we observed no reductions in the physiological active part of cobalamin bound to transcobalamin (holotranscobalamin), or increase in the metabolic marker of cobalamin status, methylmalonic acid. Instead, the non-functional part of circulating cobalamin bound to haptocorrin declined (p = 0.0009). Our results have two implications: The data questions whether metformin treatment induces an impaired cobalamin status in PCOS patients, and further suggests that serum cobalamin is a futile marker for judging cobalamin status in metformin-treated patients.
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89
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Fernàndez-Roig S, Cavallé-Busquets P, Fernandez-Ballart JD, Ballesteros M, Berrocal-Zaragoza MI, Salat-Batlle J, Ueland PM, Murphy MM. Low folate status enhances pregnancy changes in plasma betaine and dimethylglycine concentrations and the association between betaine and homocysteine. Am J Clin Nutr 2013; 97:1252-9. [PMID: 23595875 DOI: 10.3945/ajcn.112.054189] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Folate, choline, and betaine participate in homocysteine metabolism. It is not known whether they interact during pregnancy. OBJECTIVE The objective was to investigate how folate status affects choline, betaine, and dimethylglycine during pregnancy. DESIGN Fasting plasma folate, cobalamin, free choline, betaine, dimethylglycine, and total homocysteine (tHcy) were measured longitudinally at <12, 15, 24-27, and 34 gestational weeks (GW); at labor (nonfasting); and in the cord in participants (n = 522) from the Reus-Tarragona Birth Cohort (NUTrició i Creixement Intrauterí Retardat phase). Timing, dose, and duration of folic acid supplement use were recorded. Folate status was classified as below (low) or above (high) median plasma folate at baseline (27.6 nmol/L) and at 24-27 GW (11.4 nmol/L). Associations between folate or betaine with tHcy were investigated by using multiple linear regression analysis. RESULTS Plasma betaine decreased by 34.8% (1.0%) throughout pregnancy, and dimethylglycine increased by 39.7% (2.7%) between 24-27 GW and labor (all P < 0.001). Compared with high folate status, low status was associated with a higher dimethylglycine/betaine ratio from 15 GW and with lower plasma betaine and higher dimethylglycine from 24 to 27 GW, for the rest of pregnancy. Regression analysis showed that by 24-27 GW, both plasma folate and betaine were inversely associated with tHcy when folate status was low and that the association between betaine and tHcy depended on folate status at 24-27 and 34 GW (interaction terms: P < 0.001 and P < 0.01). Betaine was inversely associated with tHcy at labor regardless of folate status. CONCLUSION Low folate status enhances the reduction in betaine and the increase in dimethylglycine during pregnancy and strengthens the association between betaine and tHcy. This trial was registered at clinicaltrials.gov as NCT01778205.
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Affiliation(s)
- Sílvia Fernàndez-Roig
- Area of Preventive Medicine and Public Health, Faculty of Medicine and Health Sciences, Universitat Rovira i Virgili, Reus, Spain
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90
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Interlaboratory comparison for quantitative primary metabolite profiling in Pichia pastoris. Anal Bioanal Chem 2013; 405:5159-69. [DOI: 10.1007/s00216-013-6964-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Revised: 03/28/2013] [Accepted: 04/02/2013] [Indexed: 01/03/2023]
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91
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Grützner N, Heilmann RM, Stupka KC, Rangachari VR, Weber K, Holzenburg A, Suchodolski JS, Steiner JM. Serum homocysteine and methylmalonic acid concentrations in Chinese Shar-Pei dogs with cobalamin deficiency. Vet J 2013; 197:420-6. [PMID: 23499543 DOI: 10.1016/j.tvjl.2013.02.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Revised: 12/21/2012] [Accepted: 02/04/2013] [Indexed: 10/27/2022]
Abstract
Cobalamin deficiency is suspected to be hereditary in Chinese Shar-Pei dogs (Shar-Peis), and inherited causes of cobalamin deficiency may affect the cellular processing of cobalamin. In humans, a defect of the two main cobalamin-dependent intracellular enzymes (i.e., methionine synthase and methylmalonyl-CoA mutase) may lead to hyperhomocysteinemia and hypermethylmalonic acidemia. The aim of this retrospective study was to evaluate serum homocysteine (HCY) and methylmalonic acid (MMA) concentrations in cobalamin-deficient Shar-Peis and dogs of six other breeds. Serum samples (n=297) from cobalamin-deficient dogs (Shar-Peis, German Shepherd dogs, Labrador Retrievers, Yorkshire Terriers, Boxers, Cocker Spaniels, and Beagles) were analyzed for serum HCY and MMA concentrations. A Fisher's exact test was used to evaluate if cobalamin deficiency in Shar-Peis is associated with hyperhomocysteinemia. Serum HCY and MMA concentrations were higher in cobalamin-deficient Shar-Peis compared to cobalamin-deficient dogs of the six other breeds (P<0.0001). Hyperhomocysteinemia was associated with cobalamin deficiency in Shar-Peis (P=0.009). In addition, serum HCY and MMA concentrations did not differ between cobalamin-deficient German Shepherd dogs with and without exocrine pancreatic insufficiency (EPI), a potential cause of secondary cobalamin deficiency. These findings suggest that the function of the two intracellular cobalamin-dependent enzymes is impaired in Shar-Peis with cobalamin deficiency.
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Affiliation(s)
- Niels Grützner
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843-4474, USA.
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92
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Yang W, Chen Y, Xi C, Zhang R, Song Y, Zhan Q, Bi X, Abliz Z. Liquid chromatography-tandem mass spectrometry-based plasma metabonomics delineate the effect of metabolites' stability on reliability of potential biomarkers. Anal Chem 2013; 85:2606-10. [PMID: 23387999 DOI: 10.1021/ac303576b] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Metabonomics is an important platform for investigating the metabolites of integrated living systems and their dynamic responses to changes caused by both endogenous and exogenous factors. A metabonomics strategy based on liquid chromatography-mass spectrometry/mass spectrometry in both positive and negative ion modes was applied to investigate the short-term and long-term stability of metabolites in plasma. Principal components analysis and ten types of identified metabolites were used to summarize the time-dependent change rules in metabolites systematically at different temperatures. The long-term stability of metabolites in plasma specimens stored at -80 °C for five years was also studied. Analysis of these subjects identified 36 metabolites with statistically significant changes in expression (p < 0.05) and found a kind of metabolite with a hundred-fold change. The stability of metabolites in blood at 4 °C for 24 h was also investigated. These studies show that a thorough understanding of the effects of metabolite stability are necessary for improving the reliability of potential biomarkers.
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Affiliation(s)
- Wei Yang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050, PR China
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93
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Midttun Ø, Kvalheim G, Ueland PM. High-throughput, low-volume, multianalyte quantification of plasma metabolites related to one-carbon metabolism using HPLC-MS/MS. Anal Bioanal Chem 2012; 405:2009-17. [DOI: 10.1007/s00216-012-6602-6] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Revised: 11/20/2012] [Accepted: 11/23/2012] [Indexed: 01/25/2023]
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94
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North–south gradients in plasma concentrations of B-vitamins and other components of one-carbon metabolism in Western Europe: results from the European Prospective Investigation into Cancer and Nutrition (EPIC) Study. Br J Nutr 2012; 110:363-74. [DOI: 10.1017/s0007114512004990] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Different lifestyle patterns across Europe may influence plasma concentrations of B-vitamins and one-carbon metabolites and their relation to chronic disease. Comparison of published data on one-carbon metabolites in Western European regions is difficult due to differences in sampling procedures and analytical methods between studies. The present study aimed, to compare plasma concentrations of one-carbon metabolites in Western European regions with one laboratory performing all biochemical analyses. We performed the present study in the European Prospective Investigation into Cancer and Nutrition (EPIC) cohort among 5446 presumptively healthy individuals. Quantile regression was used to compare sex-specific median concentrations between Northern (Denmark and Sweden), Central (France, Germany, The Netherlands and United Kingdom) and Southern (Greece, Spain and Italy) European regions. The lowest folate concentrations were observed in Northern Europe (men, 10·4 nmol/l; women, 10·7 nmol/l) and highest concentrations in Central Europe. Cobalamin concentrations were slightly higher in Northern Europe (men, 330 pmol/l; women, 352 pmol/l) compared with Central and Southern Europe, but did not show a clear north–south gradient. Vitamin B2 concentrations were highest in Northern Europe (men, 22·2 nmol/l; women, 26·0 nmol/l) and decreased towards Southern Europe (Ptrend< 0·001). Vitamin B6 concentrations were highest in Central Europe in men (77·3 nmol/l) and highest in the North among women (70·4 nmol/l), with decreasing concentrations towards Southern Europe in women (Ptrend< 0·001). In men, concentrations of serine, glycine and sarcosine increased from the north to south. In women, sarcosine increased from Northern to Southern Europe. These findings may provide relevant information for the study of regional differences of chronic disease incidence in association with lifestyle.
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95
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Halwachs-Baumann G. Diagnosis of anaemia: old things rearranged. Wien Med Wochenschr 2012; 162:478-88. [PMID: 23135251 DOI: 10.1007/s10354-012-0149-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Accepted: 09/28/2012] [Indexed: 02/08/2023]
Abstract
Anaemia is one of the most leading causes of morbidity and mortality, as declared by the World Health Organisation. This syndrome is characterised by low haemoglobin levels and nonspecific clinical symptoms such as weakness, fatigue and dyspnoea. The symptoms are unspecific as the underlying causes are heterogeneous. Thus, good knowledge of the useful biomarkers and their correct assignment is needed to allow rapid and targeted diagnosis.
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Affiliation(s)
- Gabriele Halwachs-Baumann
- Department for Laboratory Medicine, Central Hospital Steyr, Sierningerstrasse 170, 4400 Steyr, Austria.
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96
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Abstract
OBJECTIVE To estimate the association of maternal plasma concentrations of tryptophan and six kynurenine pathway metabolites with the risk of preeclampsia. METHODS The study was based on a subsample of 2,936 pregnant women who delivered singleton neonates in the Norwegian Mother and Child Cohort Study in 2002-2003. Maternal blood plasma was obtained at approximately gestational week 18 and was measured for tryptophan, kynurenine, kynurenic acid, anthranilic acid, 3-hydroxykynurenine, xanthurenic acid, and 3-hydroxyanthranilic acid. RESULTS Of the 2,936 pregnant women included in this study, 116 (4.0%, 95% confidence interval [CI] 3.2-4.7) had preeclampsia subsequently diagnosed. The prevalence of preeclampsia was significantly higher among women with plasma kynurenic acid concentrations greater than the 95th percentile than among those with concentrations in the 25th-75th percentile (11.0% compared with 3.3%, P<.001; adjusted odds ratio 3.6, 95% CI 1.9-6.8). This association was significantly stronger in women with prepregnancy body mass index of 25 or more (P for interaction=.03; 20.4% compared with 4.2%; P<.001). No statistically significant associations of preeclampsia with other tryptophan metabolites were found. CONCLUSION Elevated maternal plasma kynurenic acid concentrations in early pregnancy are associated with a substantial increased risk of preeclampsia in obese women. LEVEL OF EVIDENCE II.
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