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Favari C, Rinaldi de Alvarenga JF, Sánchez-Martínez L, Tosi N, Mignogna C, Cremonini E, Manach C, Bresciani L, Del Rio D, Mena P. Factors driving the inter-individual variability in the metabolism and bioavailability of (poly)phenolic metabolites: A systematic review of human studies. Redox Biol 2024; 71:103095. [PMID: 38428187 PMCID: PMC10912651 DOI: 10.1016/j.redox.2024.103095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 02/16/2024] [Accepted: 02/18/2024] [Indexed: 03/03/2024] Open
Abstract
This systematic review provides an overview of the available evidence on the inter-individual variability (IIV) in the absorption, distribution, metabolism, and excretion (ADME) of phenolic metabolites and its determinants. Human studies were included investigating the metabolism and bioavailability of (poly)phenols and reporting IIV. One hundred fifty-three studies met the inclusion criteria. Inter-individual differences were mainly related to gut microbiota composition and activity but also to genetic polymorphisms, age, sex, ethnicity, BMI, (patho)physiological status, and physical activity, depending on the (poly)phenol sub-class considered. Most of the IIV has been poorly characterised. Two major types of IIV were observed. One resulted in metabolite gradients that can be further classified into high and low excretors, as seen for all flavonoids, phenolic acids, prenylflavonoids, alkylresorcinols, and hydroxytyrosol. The other type of IIV is based on clusters of individuals defined by qualitative differences (producers vs. non-producers), as for ellagitannins (urolithins), isoflavones (equol and O-DMA), resveratrol (lunularin), and preliminarily for avenanthramides (dihydro-avenanthramides), or by quali-quantitative metabotypes characterized by different proportions of specific metabolites, as for flavan-3-ols, flavanones, and even isoflavones. Future works are needed to shed light on current open issues limiting our understanding of this phenomenon that likely conditions the health effects of dietary (poly)phenols.
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Affiliation(s)
- Claudia Favari
- Human Nutrition Unit, Department of Food and Drugs, University of Parma, Parma, Italy.
| | | | - Lorena Sánchez-Martínez
- Human Nutrition Unit, Department of Food and Drugs, University of Parma, Parma, Italy; Department of Food Technology, Food Science and Nutrition, Faculty of Veterinary Sciences, Regional Campus of International Excellence 'Campus Mare Nostrum', Biomedical Research Institute of Murcia (IMIB-Arrixaca-UMU), University Clinical Hospital 'Virgen de La Arrixaca', Universidad de Murcia, Espinardo, Murcia, Spain
| | - Nicole Tosi
- Human Nutrition Unit, Department of Food and Drugs, University of Parma, Parma, Italy
| | - Cristiana Mignogna
- Human Nutrition Unit, Department of Food and Drugs, University of Parma, Parma, Italy
| | - Eleonora Cremonini
- Department of Nutrition, University of California, Davis, CA, USA; Department of Environmental Toxicology, University of California, Davis, CA, USA
| | - Claudine Manach
- Université Clermont Auvergne, INRAE, Human Nutrition Unit, Clermont-Ferrand, France
| | - Letizia Bresciani
- Human Nutrition Unit, Department of Food and Drugs, University of Parma, Parma, Italy
| | - Daniele Del Rio
- Human Nutrition Unit, Department of Food and Drugs, University of Parma, Parma, Italy; Microbiome Research Hub, University of Parma, 43124, Parma, Italy
| | - Pedro Mena
- Human Nutrition Unit, Department of Food and Drugs, University of Parma, Parma, Italy; Microbiome Research Hub, University of Parma, 43124, Parma, Italy
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Wadell AT, Bärebring L, Hulander E, Gjertsson I, Landberg R, Lindqvist H, Winkvist A. Dietary biomarkers and food records indicate compliance to study diets in the ADIRA (Anti-inflammatory Diet In Rheumatoid Arthritis) trial. Front Nutr 2023; 10:1209787. [PMID: 37426179 PMCID: PMC10325030 DOI: 10.3389/fnut.2023.1209787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 06/05/2023] [Indexed: 07/11/2023] Open
Abstract
Background In the ADIRA (Anti-inflammatory Diet In Rheumatoid arthritis) trial, compliance to the study diets has previously been described primarily with a score based on reported intake of trial foods from telephone interviews. The aim of this study was to evaluate compliance using objective dietary biomarkers for whole grain, fruit and vegetables, margarine and oil, seafood and overall fat quality, as well as reported intake from food records of key components of the study diets. Methods Fifty patients with rheumatoid arthritis were randomized to begin with the intervention diet (rich in whole grain, fruit and vegetables, margarine/oil and seafood) or the control diet (rich in meat and high-fat dairy) for 10 weeks, followed by a ~ 4 months wash-out period, and then switched diet. Compliance was evaluated using plasma alkylresorcinols (AR) as biomarkers for intake of whole grain wheat and rye, serum carotenoids for fruit and vegetables, plasma linoleic acid (LA, 18:2 n-6) and -α-linolenic acid (18:3, n-3) for margarine and cooking oil, plasma eicosapentaenoic acid (EPA, 20:5 n-3), -docosahexaenoic acid (DHA 22:6, n-3) and -docosapentaenoic acid (22:5 n-3) for seafood, and plasma fatty acid pattern for the overall dietary fat quality. Reported intake of whole grain, fruit, berries and vegetables, seafood, red meat, and fat quality was extracted from 3-d food records. Results Plasma AR C21:0 and C23:0, LA, EPA, and DHA were higher while total serum carotenoids were lower after the intervention diet period compared to the control diet period (AR and carotenoids: p = <0.05, fatty acids: p = <0.001). Reported intake of whole grain, fruit, berries and vegetables, and seafood was higher and reported intake of red meat was lower during the intervention diet period compared to the control diet period (p = <0.001). Plasma- and reported fatty acid pattern differed as intended between the diet periods. Conclusion This study indicates that the participants in the ADIRA trial were compliant to the study diets regarding intake of whole grain, cooking fat, seafood, and red meat, and the intended overall dietary fat quality. Compliance to instructions on fruit- and vegetable intake remains uncertain. Clinical trial registration https://clinicaltrials.gov/ct2/show/NCT02941055?term=NCT02941055&draw=2&rank=1, NCT02941055.
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Affiliation(s)
- Anna Turesson Wadell
- Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Linnea Bärebring
- Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Erik Hulander
- Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Gastroenterology and Hepatology, Clinical Nutrition Unit, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Inger Gjertsson
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Rikard Landberg
- Division of Food and Nutrition Science, Department of Life Sciences, Chalmers University of Technology, Gothenburg, Sweden
| | - Helen Lindqvist
- Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Anna Winkvist
- Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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Wei Y, Yu N, Wang Z, Hao Y, Wang Z, Yang Z, Liu J, Wang J. Analysis of the multi-physiological and functional mechanism of wheat alkylresorcinols based on reverse molecular docking and network pharmacology. Food Funct 2022; 13:9091-9107. [PMID: 35943408 DOI: 10.1039/d2fo01438f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Alkylresorcinols (ARs) are phenolic lipids present in the bran part of whole grain wheat and rye, which possess antioxidant, anti-inflammatory, anti-cancer and anti-tumor properties. The physiological activities of ARs have been proven to be diverse; however, the specific molecular mechanisms are still unclear. In this study, reverse virtual screening and network pharmacology were used to explore the potential molecular mechanisms of the physiological function of ARs and their endogenous metabolites. The Metascape database was used for GO enrichment and KEGG pathway analysis. Furthermore, molecular docking was used to investigate the interactions between active compounds and potential targets. The results showed that the bioavailability of most ARs and their endogenous metabolites was 0.55 and 0.56, while the bioavailability of certain endogenous metabolites was only 0.11. Multiplex analysis was used to screen 73 important targets and 4 core targets (namely, HSP90AA1, EP300, HSP90AB1 and ERBB2) out of the 163 initial targets. The important targets involved in the key KEGG pathway were pathways in cancer (hsa05200), lipid and atherosclerosis (hsa05417), Th17 cell differentiation (hsa04659), chemical carcinogenesis-receptor activation (hsa05207), and prostate cancer (hsa05215). The compounds involved in the core targets were AR-C21, AR-C19, AR-C17, 3,5-DHPHTA-S, 3,5-DHPHTA-G, 3,5-DHPPTA, 3,5-DHPPTA-S, 3,5-DHPPTA-G, 3,5-DHPPTA-Gly and 3,5-DHPPA-G. The interaction force between them was mainly related to hydrogen bonds and van der Waals. Overall, the physiological activities of ARs are not only related to their multiple targets, but may also be related to the synergistic effect of their endogenous metabolites.
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Affiliation(s)
- Yulong Wei
- China-Canada Joint Lab of Food Nutrition and Health (Beijing), Beijing Technology & Business University (BTBU), Beijing 100048, China.
| | - Ning Yu
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China
| | - Ziyuan Wang
- China-Canada Joint Lab of Food Nutrition and Health (Beijing), Beijing Technology & Business University (BTBU), Beijing 100048, China.
| | - Yiming Hao
- China-Canada Joint Lab of Food Nutrition and Health (Beijing), Beijing Technology & Business University (BTBU), Beijing 100048, China.
| | - Zongwei Wang
- China-Canada Joint Lab of Food Nutrition and Health (Beijing), Beijing Technology & Business University (BTBU), Beijing 100048, China.
| | - Zihui Yang
- China-Canada Joint Lab of Food Nutrition and Health (Beijing), Beijing Technology & Business University (BTBU), Beijing 100048, China.
| | - Jie Liu
- China-Canada Joint Lab of Food Nutrition and Health (Beijing), Beijing Technology & Business University (BTBU), Beijing 100048, China.
| | - Jing Wang
- China-Canada Joint Lab of Food Nutrition and Health (Beijing), Beijing Technology & Business University (BTBU), Beijing 100048, China.
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DHPPA, a major plasma alkylresorcinol metabolite reflecting whole-grain wheat and rye intake, and risk of metabolic syndrome: a case-control study. Eur J Nutr 2022; 61:3247-3254. [PMID: 35459972 DOI: 10.1007/s00394-022-02880-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 03/22/2022] [Indexed: 11/04/2022]
Abstract
PURPOSE Whole-grain intake assessed through self-reported methods has been suggested to be inversely associated with the metabolic syndrome (MetS) risk in epidemiological studies. However, few studies have evaluated the association between whole-grain intake and MetS risk using objective biomarkers of whole-grain intake. The aim of this study was to examine the association between plasma 3-(3,5-Dihydroxyphenyl)-1-propanoic acid (DHPPA), a biomarker of whole-grain wheat and rye intake, and MetS risk in a Chinese population. METHODS A case-control study of 667 MetS cases and 667 matched controls was conducted based on baseline data of the Tongji-Ezhou Cohort study. Plasma DHPPA concentrations were assessed by high-performance liquid chromatography-tandem mass spectrometry. The MetS was defined based on criteria set by the Joint Interim Statement. RESULTS Plasma DHPPA was inversely associated with MetS risk. After adjustment for age, sex, body mass index, smoking status, alcohol drinking status, physical activity and education level, the odds ratios (ORs) for MetS across increasing quartiles of plasma DHPPA concentrations were 1 (referent), 0.86 (0.58-1.26), 0.77 (0.52-1.15), and 0.59 (0.39-0.89), respectively. In addition, the cubic spline analysis revealed a potential nonlinear association between plasma DHPPA and MetS, with a steep reduction in the risk at the lower range of plasma DHPPA concentration. CONCLUSION Our study revealed that individuals with higher DHPPA concentrations in plasma had lower odds of MetS compared to those with lower DHPPA concentrations in plasma. Our findings provided further evidence to support health benefits of whole grain consumption.
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Impact of wheat aleurone on biomarkers of cardiovascular disease, gut microbiota and metabolites in adults with high body mass index: a double-blind, placebo-controlled, randomized clinical trial. Eur J Nutr 2022; 61:2651-2671. [PMID: 35247098 PMCID: PMC9279244 DOI: 10.1007/s00394-022-02836-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 02/11/2022] [Indexed: 02/08/2023]
Abstract
Purpose Aleurone is a cereal bran fraction containing a variety of beneficial nutrients including polyphenols, fibers, minerals and vitamins. Animal and human studies support the beneficial role of aleurone consumption in reducing cardiovascular disease (CVD) risk. Gut microbiota fiber fermentation, polyphenol metabolism and betaine/choline metabolism may in part contribute to the physiological effects of aleurone. As primary objective, this study evaluated whether wheat aleurone supplemented foods could modify plasma homocysteine. Secondary objectives included changes in CVD biomarkers, fecal microbiota composition and plasma/urine metabolite profiles. Methods A parallel double-blind, placebo-controlled and randomized trial was carried out in two groups of obese/overweight subjects, matched for age, BMI and gender, consuming foods supplemented with either aleurone (27 g/day) (AL, n = 34) or cellulose (placebo treatment, PL, n = 33) for 4 weeks. Results No significant changes in plasma homocysteine or other clinical markers were observed with either treatment. Dietary fiber intake increased after AL and PL, animal protein intake increased after PL treatment. We observed a significant increase in fecal Bifidobacterium spp with AL and Lactobacillus spp with both AL and PL, but overall fecal microbiota community structure changed little according to 16S rRNA metataxonomics. Metabolomics implicated microbial metabolism of aleurone polyphenols and revealed distinctive biomarkers of AL treatment, including alkylresorcinol, cinnamic, benzoic and ferulic acids, folic acid, fatty acids, benzoxazinoid and roasted aroma related metabolites. Correlation analysis highlighted bacterial genera potentially linked to urinary compounds derived from aleurone metabolism and clinical parameters. Conclusions Aleurone has potential to modulate the gut microbial metabolic output and increase fecal bifidobacterial abundance. However, in this study, aleurone did not impact on plasma homocysteine or other CVD biomarkers. Trial Registration The study was registered at ClinicalTrials.gov (NCT02067026) on the 17th February 2014. Supplementary Information The online version contains supplementary material available at 10.1007/s00394-022-02836-9.
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Sun T, Deng Y, Geng X, Fang Q, Li X, Chen L, Zhan M, Li D, Zhu K, Li H, Liu L. Plasma Alkylresorcinol Metabolite, a Biomarker for Whole-Grain Intake, Is Inversely Associated with Risk of Nonalcoholic Fatty Liver Disease in a Case-Control Study of Chinese Adults. J Nutr 2022; 152:1052-1058. [PMID: 36967162 DOI: 10.1093/jn/nxab404] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 09/10/2021] [Accepted: 11/25/2021] [Indexed: 11/12/2022] Open
Abstract
ABSTRACT
Background
Epidemiological studies consistently find associations between whole-grain intake and reduced risk of obesity and related metabolic diseases, yet data on the potential of whole grains to prevent fatty liver diseases are scarce.
Objectives
To examine whether plasma 3-(3, 5-dihydroxyphenyl)-1-propanoic acid (DHPPA), a biomarker of whole-grain wheat and rye intake, is associated with nonalcoholic fatty liver disease (NAFLD).
Methods
This case-control study of Chinese adults enrolled 940 NAFLD cases and 940 age- and sex-matched non-NAFLD controls (mean age: 55.2 years; 65% males). NAFLD diagnosis was defined as individuals whose hepatic ultrasound disclosed hepatic steatosis at any stage, after the exclusion of alcohol abuse and other liver diseases. Fasting plasma DHPPA concentration was measured by high-performance liquid chromatography-tandem mass spectrometry. Multivariate adjusted odds ratios (ORs) and 95% confidence intervals (CI) were estimated to assess the association between plasma DHPPA and NAFLD using conditional logistic regression.
Results
Plasma concentration of DHPPA was significantly lower in NAFLD patients compared to controls (median: 9.86 nmol/L vs. 10.9 nmol/L, P = 0.002). In multivariable logistic regression models, the ORs (95% CI) for NAFLD across increasing tertiles of plasma DHPPA were 1 (referent), 0.76 (0.54, 1.05) and 0.65 (0.45, 0.93), respectively (P for trend = 0.026). In addition, the inverse associations persisted in subgroups stratified by sex, age, BMI, abdominal adiposity, smoking status, physical activity, diabetes, hypertension, and hyperlipidemia.
Conclusions
These results indicate that increased plasma DHPPA concentration is associated with lower risk of NAFLD in Chinese adults, independently of well-known risk factors. Our finding provides evidence to support health benefits of whole-grain consumption on NAFLD. This trial was registered at clinicaltrials.gov as NCT03845868.
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Affiliation(s)
- Taoping Sun
- Department of Nutrition and Food Hygiene, Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Zhuhai Precision Medical Center, Zhuhai Interventional Medical Center, Zhuhai People's Hospital (Zhuhai Hospital Affiliated with Jinan University), Zhuhai, China
| | - Yao Deng
- Zhuhai Precision Medical Center, Zhuhai Interventional Medical Center, Zhuhai People's Hospital (Zhuhai Hospital Affiliated with Jinan University), Zhuhai, China
| | - Xuyang Geng
- Zhuhai Precision Medical Center, Zhuhai Interventional Medical Center, Zhuhai People's Hospital (Zhuhai Hospital Affiliated with Jinan University), Zhuhai, China
| | - Qin Fang
- Department of medical affairs, Zhuhai Interventional Medical Center, Zhuhai People's Hospital (Zhuhai Hospital Affiliated with Jinan University), Zhuhai, China
| | - Xiaoqin Li
- Department of Nutrition and Food Hygiene, Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Liangkai Chen
- Department of Nutrition and Food Hygiene, Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Meixiao Zhan
- Zhuhai Precision Medical Center, Zhuhai Interventional Medical Center, Zhuhai People's Hospital (Zhuhai Hospital Affiliated with Jinan University), Zhuhai, China
| | - Deyun Li
- Zhuhai Center for Disease Control and Prevention, Zhuhai, China
| | - Kejing Zhu
- Zhuhai Center for Disease Control and Prevention, Zhuhai, China
| | - Huawen Li
- Department of Gynecology, Zhuhai People's Hospital (Zhuhai Hospital affiliated with Jinan University), Zhuhai, China
| | - Liegang Liu
- Department of Nutrition and Food Hygiene, Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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An Overview of Alkylresorcinols Biological Properties and Effects. J Nutr Metab 2022; 2022:4667607. [PMID: 35036005 PMCID: PMC8754669 DOI: 10.1155/2022/4667607] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 12/11/2021] [Accepted: 12/14/2021] [Indexed: 12/11/2022] Open
Abstract
The investigation of alkylresorcinols has drawn an increasing interest recently. Alkylresorcinols (ARs) are natural chemical compounds synthesized by bacteria, fungi, sponges, and higher plants, possessing a lipophilic polyphenol structures and a myriad of biological properties. Human takes ARs as a component of a whole grain diet (from whole grain rye, wheat, and barley products), and thus, alkylresorcinols are frequently used as whole grain intake markers. Besides, ARs are considered as promising bioregulators of metabolic and immune processes, as well as adjuvant therapeutic agents for antimicrobial and anticancer treatment. In this review, we attempted to systematize the accumulated information concerning ARs origin, metabolism, biological properties, and their effect on human health.
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Dornan K, Gunenc A, Oomah BD, Hosseinian F. Odd chain fatty acids and odd chain phenolic lipids (alkylresorcinols) are essential for diet. J AM OIL CHEM SOC 2021. [DOI: 10.1002/aocs.12507] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Kelly Dornan
- Food Science, Chemistry Department Carleton University Ottawa Ontario Canada
| | - Aynur Gunenc
- Food Science, Chemistry Department Carleton University Ottawa Ontario Canada
| | - B. Dave Oomah
- (Retired) Formerly with Summerland Research and Development Centre, Agriculture and Agri‐Food Canada Summerland British Columbia Canada
| | - Farah Hosseinian
- Food Science, Chemistry Department Carleton University Ottawa Ontario Canada
- Institute of Biochemistry Carleton University Ottawa Ontario Canada
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Rodríguez-Morató J, Jayawardene S, Huang NK, Dolnikowski GG, Galluccio J, Lichtenstein AH, Matthan NR. Simplified method for the measurement of plasma alkylresorcinols: Biomarkers of whole-grain intake. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2020; 34:e8805. [PMID: 32297383 DOI: 10.1002/rcm.8805] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 02/19/2020] [Accepted: 04/01/2020] [Indexed: 06/11/2023]
Abstract
RATIONALE Consumption of whole grains is negatively associated with cardiovascular disease (CVD) risk but quantification of whole-grain intake is challenging. Alkylresorcinols (ARs) are biomarkers of whole-grain intake. Current methods for AR quantification involve a time-consuming multi-step separation process that hampers applicability in large-scale studies. METHODS We developed a streamlined method to quantify ARs in human plasma based on protein precipitation and direct injection into an ultra-high-performance liquid chromatograph coupled to a quadrupole time-of-flight mass spectrometer operating in atmospheric pressure chemical ionization negative ion mode. RESULTS Separation of five major ARs was achieved, with linearity in the 5 to 550 nmol/L range and a lower limit of detection (LOD) of 0.5 nmol/L and quantification (LOQ) of 5 nmol/L. The within-run and between-run precision and accuracy were below 15%, and recoveries above 90%. Once validated, the method was applied to measure concentrations of plasma ARs in subjects who participated in a randomized, crossover trial evaluating the effect of carbohydrate type on CVD risk factors. The unrefined carbohydrate diet with the highest fiber content resulted in the highest plasma AR concentration (93 ± 78 nmol/L), and was significantly different (p <0.01) from lower fiber diets (18 ± 26 nmol/L and 19 ± 26 nmol/L, simple and unrefined carbohydrate, respectively). CONCLUSIONS This method offers a simplified approach to measure concentrations of plasma ARs as an objective biomarker of whole-grain intake that can be applied to large-scale cohort studies.
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Affiliation(s)
- Jose Rodríguez-Morató
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, 711 Washington Street, Boston, MA, 02111, USA
- Universitat Pompeu Fabra, Carrer Dr. Aiguader 80, 08003, Barcelona, Spain
| | - Sarah Jayawardene
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, 711 Washington Street, Boston, MA, 02111, USA
| | - Neil K Huang
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, 711 Washington Street, Boston, MA, 02111, USA
| | - Gregory G Dolnikowski
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, 711 Washington Street, Boston, MA, 02111, USA
| | - Jean Galluccio
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, 711 Washington Street, Boston, MA, 02111, USA
| | - Alice H Lichtenstein
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, 711 Washington Street, Boston, MA, 02111, USA
| | - Nirupa R Matthan
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, 711 Washington Street, Boston, MA, 02111, USA
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Tuomainen M, Kärkkäinen O, Leppänen J, Auriola S, Lehtonen M, Savolainen MJ, Hermansen K, Risérus U, Åkesson B, Thorsdottir I, Kolehmainen M, Uusitupa M, Poutanen K, Schwab U, Hanhineva K. Quantitative assessment of betainized compounds and associations with dietary and metabolic biomarkers in the randomized study of the healthy Nordic diet (SYSDIET). Am J Clin Nutr 2019; 110:1108-1118. [PMID: 31504116 DOI: 10.1093/ajcn/nqz179] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 07/10/2019] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Recently, a group of betainized compounds have been suggested to play a role in health effects in relation to a whole-grain-rich diet. OBJECTIVES The aims of this study were to develop a quantitative mass spectrometric method for selected betainized compounds in human plasma, and to investigate their association with nutrient intake and measures of metabolic health in participants of the SYSDIET study. METHODS The SYSDIET study was a controlled randomized intervention including individuals with metabolic syndrome, where the healthy Nordic diet (HND) group increased intakes of whole grains, canola oil, berries, and fish, whereas the control diet (CD) group consumed low-fiber cereal products, milk fat, and restricted amounts of fish and berries. A quantitative LC combined with triple quadrupole MS method for betainized compounds was developed and applied to fasting plasma samples from baseline (week 0) and the end of the intervention (week 18 or 24). Concentrations of betainized compounds were correlated with intakes of selected nutrients and fiber and measures of metabolic health. RESULTS Pipecolic acid betaine (PAB) concentrations were significantly higher in the HND group than in the CD group (P = 0.00032) at the end of the intervention and correlated directly (P < 0.0001) with intakes of dietary fiber (r = 0.376) and a biomarker related to whole-grain rye intake, namely the ratio of alkylresorcinol C17:0 to C21:0 (r = 0.442). PAB was associated inversely with fasting plasma insulin consistently at the beginning and at the end of the intervention (P < 0.001, r = -0.300; P < 0.01, r = -0.250, respectively), as well as IL-1 receptor antagonist (P < 0.01, r = -0.232 at the beginning; P < 0.01, r = -0.236 at the end) and serum LDL/HDL cholesterol (P < 0.01, r = -0.239 at the beginning; P < 0.01, r = -0.241 at the end). CONCLUSIONS Among adults with the metabolic syndrome, PAB plasma concentrations were associated with fasting insulin, inflammation, and lipids and were significantly increased with adoption of the HND. Further studies are needed to clarify the biological functions of betainized compounds. This trial was registered at clinicaltrials.gov as NCT00992641.
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Affiliation(s)
- Marjo Tuomainen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
| | - Olli Kärkkäinen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland.,School of Pharmacy, University of Eastern Finland, Kuopio, Finland
| | - Jukka Leppänen
- School of Pharmacy, University of Eastern Finland, Kuopio, Finland
| | - Seppo Auriola
- School of Pharmacy, University of Eastern Finland, Kuopio, Finland.,LC-MS Metabolomics Center, Biocenter Kuopio, Kuopio, Finland
| | - Marko Lehtonen
- School of Pharmacy, University of Eastern Finland, Kuopio, Finland.,LC-MS Metabolomics Center, Biocenter Kuopio, Kuopio, Finland
| | - Markku J Savolainen
- Medical Research Center, Department of Internal Medicine, University of Oulu and Oulu University Hospital, Oulu, Finland
| | - Kjeld Hermansen
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Ulf Risérus
- Department of Public Health and Caring Sciences, Clinical Nutrition and Metabolism, Uppsala University, Uppsala, Sweden
| | - Björn Åkesson
- Biomedical Nutrition, Pure and Applied Biochemistry, Lund University, Lund, Sweden.,Department of Clinical Nutrition, Skåne University Hospital, Lund, Sweden
| | - Inga Thorsdottir
- Unit for Nutrition Research, University of Iceland and Landspitali-The National University Hospital of Iceland, Reykjavik, Iceland
| | - Marjukka Kolehmainen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
| | - Matti Uusitupa
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
| | - Kaisa Poutanen
- VTT Technical Research Centre of Finland, Espoo, Finland
| | - Ursula Schwab
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland.,Department of Medicine, Endocrinology and Clinical Nutrition, Kuopio University Hospital, Kuopio, Finland
| | - Kati Hanhineva
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
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11
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Sun T, Huang H, Bao W, Liu L. Reply to LL Su, V Werkmann, and J Deyoe. Am J Clin Nutr 2019; 110:525-526. [PMID: 31367764 DOI: 10.1093/ajcn/nqz086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Taoping Sun
- Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA
| | - Hao Huang
- Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA
| | - Wei Bao
- Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA
| | - Liegang Liu
- From the Department of Nutrition and Food Hygiene, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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12
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Su L. Comment on "Plasma alkylresorcinol metabolite, a biomarker of whole-grain wheat and rye intake, and risk of ischemic stroke: a case-control study". Am J Clin Nutr 2019; 110:524. [PMID: 31367760 DOI: 10.1093/ajcn/nqz083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Le Su
- From the Department of Epidemiology and Biostatistics, School of Public Health, Indiana University, Bloomington, IN
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13
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Hålldin E, Eriksen AK, Brunius C, da Silva AB, Bronze M, Hanhineva K, Aura AM, Landberg R. Factors Explaining Interpersonal Variation in Plasma Enterolactone Concentrations in Humans. Mol Nutr Food Res 2019; 63:e1801159. [PMID: 30817848 PMCID: PMC7317467 DOI: 10.1002/mnfr.201801159] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 01/15/2019] [Indexed: 11/25/2022]
Abstract
Lignans are diphenolic plant compounds with potential health modulating properties that are absorbed to the circulation and metabolized to the enterolignans enterodiol (END) and enterolactone (ENL) by gut microbiota. Epidemiological studies have inconsistently shown that a high lignan intake and circulating ENL are associated with reduced risk of breast‐, prostate‐, and colorectal cancer as well as cardiovascular disease and total and cause‐specific mortality. Inconsistencies can be due to interpersonal variation of ENL formation or responses. The aim of this review is to identify and evaluate the impact of factors influencing variability in plasma concentrations of the main enterolignan, ENL. The main determinants of plasma ENL concentrations are intake of lignan and lignan‐rich foods, composition and activity of intestinal microflora, antimicrobial use, nutrient intake, BMI, smoking, sex, and age. Composition and activity of the intestinal microbiota appear to be the most critical factor governing interpersonal variability in plasma ENL concentration followed by the use of antibiotics. Future studies with combined data from gut microbiota and metabolomics with food intake and life style data can be used to estimate the relative contribution of the different factors to ENL concentration in quantitative terms.
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Affiliation(s)
- Elin Hålldin
- Department of Molecular Science, Uppsala BioCenter, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden
| | - Anne Kirstine Eriksen
- Department of Molecular Science, Uppsala BioCenter, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden.,Diet, Genes and Environment, Danish Cancer Society Research Center, Strandboulevarden 49, DK, 2100, Copenhagen Ø, Denmark
| | - Carl Brunius
- Department of Biology and Biological Engineering, Food and Nutrition Science, Chalmers University of Technology, Gothenburg, Sweden
| | - Andreia Bento da Silva
- ITQB-NOVA, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal.,Faculty of Pharmacy of the University of Lisbon, Portugal
| | - Maria Bronze
- ITQB-NOVA, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal.,Faculty of Pharmacy of the University of Lisbon, Portugal.,Instituto de Biologia Experimental Tecnológica (iBET), Apartado 12, 2781-901, Oeiras, Portugal
| | - Kati Hanhineva
- LC-MS Metabolomics Center, Kuopio, Finland.,Department of Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
| | - Anna-Marja Aura
- VTT Technical Research Centre of Finland Ltd, Post Office Box 1000, Tietotie 2, Espoo, FI-02044 VTT, Finland
| | - Rikard Landberg
- Department of Biology and Biological Engineering, Food and Nutrition Science, Chalmers University of Technology, Gothenburg, Sweden
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14
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Long-Term Whole Grain Wheat and Rye Intake Reflected by Adipose Tissue Alkylresorcinols and Breast Cancer: A Case-Cohort Study. Nutrients 2019; 11:nu11020465. [PMID: 30813337 PMCID: PMC6412439 DOI: 10.3390/nu11020465] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/15/2019] [Accepted: 02/18/2019] [Indexed: 12/30/2022] Open
Abstract
Whole grain rye (WGR) and whole grain wheat (WGW) have been suggested to protect against the development of breast cancer. In this study, we estimated long-term intake of WGR and WGW, using both a food frequency questionnaire (FFQ) and alkylresorcinol concentrations in adipose tissue biopsies, in relation to the risk of developing invasive breast cancer in a case-cohort study (n = 414 in the case group, n = 933 in the subcohort group) on the Danish “Diet, Cancer and Health” cohort. The median follow-up time of the subcohort was 5.3 years. Total WGR and WGW intake estimated with FFQ or reflected by total alkylresorcinol concentration in adipose tissue was not significantly associated with risk of breast cancer. However, after adjustment for total WGR and WGW intake, women in the highest quartile of relative WGR intake, reflected by the alkylresorcinol C17:0/C21:0 ratio, had a higher risk of overall breast cancer and estrogen-receptor-positive (ER+) breast cancer than women in the lowest quartile of relative WGR intake, while the risk of estrogen-receptor-negative (ER-) breast cancer incidence was unaffected. Similar results were obtained with the FFQ data. Based on these data, further investigation of the role of specific grain types in reducing or increasing breast cancer risk, and their overall impact on health, is warranted.
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15
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Sawicki CM, Livingston KA, Ross AB, Jacques PF, Koecher K, McKeown NM. Evaluating Whole Grain Intervention Study Designs and Reporting Practices Using Evidence Mapping Methodology. Nutrients 2018; 10:nu10081052. [PMID: 30096913 PMCID: PMC6115963 DOI: 10.3390/nu10081052] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 08/04/2018] [Accepted: 08/06/2018] [Indexed: 01/15/2023] Open
Abstract
Consumption of whole grains have been associated with reduced risk of chronic diseases in many observational studies; yet, results of intervention studies are mixed. We aimed to use evidence mapping to capture the methodological and reporting variability in whole grain intervention studies that may contribute to this inconsistency. We conducted a reproducible search in OVID Medline for whole grain human intervention studies (published 1946 to February 2018). After screening based on a priori criteria, we identified 202 publications describing a total of 213 unique trials. Over half (55%) were acute trials, lasting ≤1 day, 30% were moderate duration studies (up to 6 weeks) and 15% were of longer duration (more than 6 weeks). The majority of acute trials (75%) examined measures of glycaemia and/or insulinemia, while most of the longer trials included measures of cardiometabolic health (71%), appetite/satiety (57%) and weight/adiposity (56%). Among the moderate and long duration trials, there was a wide range of how whole grains were described but only 10 publications referenced an established definition. Only 55% of trials reported the actual amount of whole grains (in grams or servings), while 36% reported the amount of food/product and 9% did not report a dose at all. Of the interventions that provided a mixture of whole grains, less than half (46%) reported the distribution of the different grain types. Reporting of subject compliance also varied and only 22% used independent biomarkers of whole grain intake. This evidence map highlights the need to standardize both study protocols and reporting practices to support effective synthesis of study results and provide a stronger foundation to better inform nutrition scientists and public health policy.
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Affiliation(s)
- Caleigh M Sawicki
- Nutritional Epidemiology, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA 02111, USA.
- Gerald J. and Dorothy R. Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA 02111, USA.
| | - Kara A Livingston
- Nutritional Epidemiology, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA 02111, USA.
| | - Alastair B Ross
- Department of Biology and Biological Engineering, Chalmers University of Technology, 41296 Gothenburg, Sweden.
| | - Paul F Jacques
- Nutritional Epidemiology, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA 02111, USA.
- Gerald J. and Dorothy R. Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA 02111, USA.
| | - Katie Koecher
- Bell Institute of Health, Nutrition and Food Safety, General Mills, Inc., Minneapolis, MN 55427, USA.
| | - Nicola M McKeown
- Nutritional Epidemiology, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA 02111, USA.
- Gerald J. and Dorothy R. Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA 02111, USA.
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16
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Rothwell JA, Madrid-Gambin F, Garcia-Aloy M, Andres-Lacueva C, Logue C, Gallagher AM, Mack C, Kulling SE, Gao Q, Praticò G, Dragsted LO, Scalbert A. Biomarkers of intake for coffee, tea, and sweetened beverages. GENES & NUTRITION 2018; 13:15. [PMID: 29997698 PMCID: PMC6030755 DOI: 10.1186/s12263-018-0607-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 06/08/2018] [Indexed: 01/03/2023]
Abstract
Non-alcoholic beverages are important sources of nutrients and bioactive compounds that may influence human health and increase or decrease the risk of chronic diseases. A wide variety of beverage constituents are absorbed in the gut, found in the systemic circulation and excreted in urine. They may be used as compliance markers in intervention studies or as biomarkers of intake to improve measurements of beverage consumption in cohort studies and reveal new associations with disease outcomes that may have been overlooked when using dietary questionnaires. Here, biomarkers of intake of some major non-alcoholic beverages-coffee, tea, sugar-sweetened beverages, and low-calorie-sweetened beverages-are reviewed. Results from dietary intervention studies and observational studies are reviewed and analyzed, and respective strengths and weaknesses of the various identified biomarkers discussed. A variety of compounds derived from phenolic acids, alkaloids, and terpenes were shown to be associated with coffee intake and trigonelline and cyclo(isoleucylprolyl) showed a particularly high specificity for coffee intake. Epigallocatechin and 4'-O-methylepigallocatechin appear to be the most sensitive and specific biomarkers for green or black tea, while 4-O-methylgallic acid may be used to assess black tea consumption. Intake of sugar-sweetened beverages has been assessed through the measurement of carbon-13 enrichment of whole blood or of blood alanine in North America where sugar from sugarcane or corn is used as a main ingredient. The most useful biomarkers for low-calorie-sweetened beverages are the low-calorie sweeteners themselves. Further studies are needed to validate these biomarkers in larger and independent populations and to further evaluate their specificity, reproducibility over time, and fields of application.
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Affiliation(s)
- Joseph A. Rothwell
- International Agency for Research on Cancer (IARC), Nutrition and Metabolism Section, Biomarkers Group, 150 Cours Albert Thomas, F-69372 Lyon CEDEX 08, France
| | - Francisco Madrid-Gambin
- Biomarkers and Nutrimetabolomics Laboratory, Department of Nutrition, Food Sciences and Gastronomy, Campus Torribera, Faculty of Pharmacy and Food Sciences, University of Barcelona, Barcelona, Spain
| | - Mar Garcia-Aloy
- Biomarkers and Nutrimetabolomics Laboratory, Department of Nutrition, Food Sciences and Gastronomy, Campus Torribera, Faculty of Pharmacy and Food Sciences, University of Barcelona, Barcelona, Spain
- CIBER de Fragilidad y Envejecimiento Saludable (CIBERFES), Instituto de Salud Carlos III, Barcelona, Spain
| | - Cristina Andres-Lacueva
- Biomarkers and Nutrimetabolomics Laboratory, Department of Nutrition, Food Sciences and Gastronomy, Campus Torribera, Faculty of Pharmacy and Food Sciences, University of Barcelona, Barcelona, Spain
- CIBER de Fragilidad y Envejecimiento Saludable (CIBERFES), Instituto de Salud Carlos III, Barcelona, Spain
| | - Caomhan Logue
- Nutrition Innovation Centre for Food and Health (NICHE), Biomedical Sciences Research Institute, Ulster University, Cromore Road, Coleraine, Northern Ireland
| | - Alison M. Gallagher
- Nutrition Innovation Centre for Food and Health (NICHE), Biomedical Sciences Research Institute, Ulster University, Cromore Road, Coleraine, Northern Ireland
| | - Carina Mack
- Department of Safety and Quality of Fruit and Vegetables, Federal Research Institute of Nutrition and Food, Max Rubner-Institut, Karlsruhe, Germany
| | - Sabine E. Kulling
- Department of Safety and Quality of Fruit and Vegetables, Federal Research Institute of Nutrition and Food, Max Rubner-Institut, Karlsruhe, Germany
| | - Qian Gao
- Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Giulia Praticò
- Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Lars O. Dragsted
- Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Augustin Scalbert
- International Agency for Research on Cancer (IARC), Nutrition and Metabolism Section, Biomarkers Group, 150 Cours Albert Thomas, F-69372 Lyon CEDEX 08, France
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17
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Wu H, Mhd Omar NA, Håkansson N, Wolk A, Michaëlsson K, Landberg R. Evaluation of alkylresorcinols in adipose tissue biopsies as a long-term biomarker of whole-grain wheat and rye intake in free-living Swedish men and women. Public Health Nutr 2018; 21:1933-1942. [PMID: 29547368 PMCID: PMC10261004 DOI: 10.1017/s1368980018000484] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2017] [Accepted: 01/29/2018] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Wheat and rye, the most consumed whole grains (WG) in the Nordic countries, contain alkylresorcinols (AR) in their bran. AR concentrations in human adipose tissue might reflect long-term WG rye and wheat intake. We aimed to evaluate AR concentrations in adipose tissue biopsies as a long-term biomarker of WG wheat and rye intake in free-living Swedish men and women. DESIGN Cross-sectional study. AR concentrations in adipose tissue biopsies were analysed and compared with long-term WG intake assessed by three FFQ (repeated over a period of 14 years in men, 17 years in women) and with plasma AR concentrations. SETTING The Cohort of Swedish Men between 1997 and 2010 and the Swedish Mammography Cohort between 1987 and 2003, Sweden. SUBJECTS Men (n 149) and women (n 109). RESULTS Long-term WG rye intake estimated with repeated FFQ correlated (r=0·31-0·41, P<0·01) with adipose-tissue AR concentrations, while WG wheat intake correlated only weakly (r=0·17-0·33, P<0·05). Total AR concentration in adipose tissue was 61 % lower in women than in men at similar energy-adjusted WG wheat and rye intakes, but plasma concentrations were similar. AR concentrations in adipose tissue correlated well with plasma concentrations (r=0·49-0·81, P<0·001). CONCLUSIONS AR in adipose tissue reflected long-term WG rye but not WG wheat intake, probably due to poor precision in estimating WG wheat intake by FFQ. AR in adipose tissue appears promising as a biomarker of long-term WG rye intake but should be adjusted for sex.
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Affiliation(s)
- Huaxing Wu
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences, Box 7051, SE-75007 Uppsala, Sweden
| | - Nor Adila Mhd Omar
- Unit of Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Niclas Håkansson
- Unit of Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Alicja Wolk
- Unit of Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | - Karl Michaëlsson
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | - Rikard Landberg
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences, Box 7051, SE-75007 Uppsala, Sweden
- Unit of Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
- Department of Biology and Biological Engineering, Food and Nutrition Science, Chalmers University of Technology, Gothenburg, Sweden
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18
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Hoppe M, Ross AB, Svelander C, Sandberg AS, Hulthén L. Low-phytate wholegrain bread instead of high-phytate wholegrain bread in a total diet context did not improve iron status of healthy Swedish females: a 12-week, randomized, parallel-design intervention study. Eur J Nutr 2018; 58:853-864. [PMID: 29796932 PMCID: PMC6437124 DOI: 10.1007/s00394-018-1722-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 05/15/2018] [Indexed: 10/26/2022]
Abstract
PURPOSE To investigate the effects of eating wholegrain rye bread with high or low amounts of phytate on iron status in women under free-living conditions. METHODS In this 12-week, randomized, parallel-design intervention study, 102 females were allocated into two groups, a high-phytate-bread group or a low-phytate-bread group. These two groups were administered: 200 g of blanched wholegrain rye bread/day, or 200 g dephytinized wholegrain rye bread/day. The bread was administered in addition to their habitual daily diet. Iron status biomarkers and plasma alkylresorcinols were analyzed at baseline and post-intervention. RESULTS Fifty-five females completed the study. There was a significant difference in change over time in total body iron stores between the two groups (p < 0.035). In the low-phytate bread group (n = 24) there were significant within-group decreases in both ferritin (mean 12%; from 32 ± 7 to 27 ± 6 μg/L, geometric mean ± SEM, p < 0.018) and total body iron (mean 12%; from 6.9 ± 1.4 to 5.4 ± 1.1 mg/kg, p < 0.035). Plasma alkylresorcinols indicated that most subjects complied with the intervention CONCLUSIONS In Swedish females of reproductive age, no statistically significant difference in iron status was detected after 12 weeks of high-phytate wholegrain bread consumption. However, consumption of low-phytate wholegrain bread for 12 weeks resulted in a reduction of markers of iron status. Although single-meal studies clearly show an increase in iron bioavailability from dephytinization of cereals, medium-term consumption of reduced phytate bread under free-living conditions suggests that this strategy does not work to improve iron status in healthy women of reproductive age.
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Affiliation(s)
- Michael Hoppe
- Department of Gastroenterology and Hepatology, Clinical Nutrition Unit, Sahlgrenska University Hospital, Gothenburg, Sweden. .,Department of Internal Medicine and Clinical Nutrition, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden.
| | - Alastair B Ross
- Department of Biology and Biological Engineering, Food and Nutrition Science, Chalmers University of Technology, Gothenburg, Sweden
| | - Cecilia Svelander
- Department of Biology and Biological Engineering, Food and Nutrition Science, Chalmers University of Technology, Gothenburg, Sweden
| | - Ann-Sofie Sandberg
- Department of Biology and Biological Engineering, Food and Nutrition Science, Chalmers University of Technology, Gothenburg, Sweden
| | - Lena Hulthén
- Department of Internal Medicine and Clinical Nutrition, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
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19
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Garcia-Aloy M, Rabassa M, Casas-Agustench P, Hidalgo-Liberona N, Llorach R, Andres-Lacueva C. Novel strategies for improving dietary exposure assessment: Multiple-data fusion is a more accurate measure than the traditional single-biomarker approach. Trends Food Sci Technol 2017. [DOI: 10.1016/j.tifs.2017.04.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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20
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Rocchetti G, Lucini L, Chiodelli G, Giuberti G, Gallo A, Masoero F, Trevisan M. Phenolic profile and fermentation patterns of different commercial gluten-free pasta during in vitro large intestine fermentation. Food Res Int 2017; 97:78-86. [DOI: 10.1016/j.foodres.2017.03.035] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 03/12/2017] [Accepted: 03/19/2017] [Indexed: 12/12/2022]
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21
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22
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Ross AB, Svelander C, Karlsson G, Savolainen OI. Identification and quantification of even and odd chained 5-n alkylresorcinols, branched chain-alkylresorcinols and methylalkylresorcinols in Quinoa (Chenopodium quinoa). Food Chem 2017; 220:344-351. [DOI: 10.1016/j.foodchem.2016.10.020] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 09/28/2016] [Accepted: 10/04/2016] [Indexed: 12/11/2022]
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23
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Choung RS, Murray JA, Marietta EV, Van Dyke CT, Ross AB. Serum alkylresorcinols as biomarkers of dietary gluten exposure in coeliac disease. Aliment Pharmacol Ther 2017; 45:643-652. [PMID: 28052442 DOI: 10.1111/apt.13917] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 09/25/2016] [Accepted: 12/05/2016] [Indexed: 12/14/2022]
Abstract
BACKGROUND Therapy for coeliac disease (CD) mainly relies on following a gluten-free diet (GFD); however, a serum marker for gluten intake has yet to be established. AIM To evaluate the utility of alkylresorcinol concentrations for detecting gluten intake in studies of human and mouse. METHODS Alkylresorcinol concentrations were compared among treated patients with coeliac disease (n = 34), untreated coeliac disease patients (n = 36) and controls (n = 33). Furthermore, seven additional coeliac disease patients whose serum samples were available at diagnosis and after GFD were evaluated. In mice studies, alkylresorcinol concentrations were compared in the serum of five mice fed a regular chow and 10 mice fed lifelong with a gluten-free chow. In addition, the effect of adding gluten on changes of alkylresorcinol concentrations was also evaluated. RESULTS Total alkylresorcinol concentrations were significantly lower in treated with coeliac disease [median (IQR), 3 (2-8) nmol/L], compared to untreated patients [median (IQR), 32 (11-74) nmol/L; P < 0.0001] or healthy controls [median (IQR), 54 (23-112) nmol/L; P < 0.0001]. Moreover, alkylresorcinol concentrations in coeliac disease patients significantly decreased after introduction of a GFD (median, 34 nmol/L at diagnosis vs. 5 nmol/L after GFD, P = 0.02). In the mice, median (IQR) total alkylresorcinol concentrations in serum samples of mice fed lifelong with a gluten-free chow was 1.8 (1.6-2.3) nmol/L, which was further significantly increased to 16 (11-22) nmol/L after 8 days of feeding with the gluten-free chow that had gluten added to it. (P = 0.008). CONCLUSION Serum alkylresorcinol concentrations could be a useful marker for dietary gluten in coeliac disease.
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Affiliation(s)
- R S Choung
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - J A Murray
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - E V Marietta
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - C T Van Dyke
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - A B Ross
- Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
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24
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Koistinen VM, Hanhineva K. Microbial and endogenous metabolic conversions of rye phytochemicals. Mol Nutr Food Res 2017; 61. [PMID: 27958675 DOI: 10.1002/mnfr.201600627] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 11/07/2016] [Accepted: 11/21/2016] [Indexed: 12/16/2022]
Abstract
Rye is one of the main cereals produced and consumed in the hemiboreal climate region. Due to its use primarily as wholegrain products, rye provides a rich source of dietary fibre as well as several classes of phytochemicals, bioactive compounds with potentially positive health implications. Here, we review the current knowledge of the metabolic pathways of phytochemical classes abundant in rye, starting from the microbial transformations occurring during the sourdough process and colonic fermentation and continuing with the endogenous metabolism. Additionally, we discuss the detection of specific metabolites by MS in different phases of their journey from the cereal to the target organs and excretion.
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Affiliation(s)
- Ville M Koistinen
- Institute of Public Health and Clinical Nutrition, , University of Eastern Finland, Kuopio, Finland
| | - Kati Hanhineva
- Institute of Public Health and Clinical Nutrition, , University of Eastern Finland, Kuopio, Finland
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25
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Eriksen AK, Hansen RD, Borre M, Larsen RG, Jensen JM, Overgaard K, Borre M, Kyrø C, Landberg R, Olsen A, Tjønneland A. A lifestyle intervention among elderly men on active surveillance for non-aggressive prostate cancer: a randomised feasibility study with whole-grain rye and exercise. Trials 2017; 18:20. [PMID: 28086943 PMCID: PMC5237258 DOI: 10.1186/s13063-016-1734-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 11/28/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The prognosis for men with non-aggressive prostate cancer is good, and several studies have investigated the impact of lifestyle changes including physical activity and diet on the prognosis. Despite positive results in animal studies and a few human interventions with whole-grain rye on markers of prostate cancer progression, the feasibility of trials investigating such dietary changes in combination with physical activity remains largely unstudied. The primary aim was to investigate the feasibility of an intervention with high whole-grain rye intake and vigorous physical activity for 6 months in men diagnosed with prostate cancer. METHODS In total, 26 men (53-72 years) recently diagnosed with non-aggressive prostate cancer and on active surveillance, were enrolled in 2011-2012 and randomly assigned to an intervention or a control group. The intervention included 170 g/day of whole-grain rye and 3 × 45 minutes/week of vigorous physical activity. The duration of the intervention was 6 months and end of follow-up 12 months after baseline. Clinic visits were scheduled at baseline and 3, 6 and 12 months after baseline. Compliance with the intervention was evaluated by diaries, food frequency questionnaires, biomarkers, and heart rate monitor data. The effect of the intervention was evaluated by linear multiple regression analysis. RESULTS In the intervention group, the mean daily intake of whole-grain rye measured from diaries was 146 g (SD: 19) for the first 3 months and 125 g (SD: 40) for the last 3 months of the intervention. The median level (5th and 95th percentiles) of vigorous physical activity was 91 (17, 193) min/week for the first 3 months and 66 (13, 259) min/week for the last 3 months. No recordings of physical activity were done for the control group. Aerobic fitness (VO2 peak) increased in the intervention group compared to the control group after the intervention. No effects were found on other cardio-metabolic outcomes or prostate cancer progression. CONCLUSIONS The lifestyle intervention appeared feasible for 6 months among Danish men and the results are encouraging for conducting full-scale studies, where the impact of whole-grain rye and vigorous physical activity on prostate cancer progression and metabolic parameters can be evaluated. TRIAL REGISTRATION ClinicalTrials.gov, NCT01300104 . Registered on 18 February 2011.
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Affiliation(s)
- Anne Kirstine Eriksen
- Unit of Diet, Genes and Environment, Danish Cancer Society Research Center, Strandboulevarden 49, 2100 Copenhagen, Denmark
| | - Rikke Dalgaard Hansen
- Unit of Diet, Genes and Environment, Danish Cancer Society Research Center, Strandboulevarden 49, 2100 Copenhagen, Denmark
| | - Michael Borre
- Institute for Clinical Medicine – Department of Urology, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark
| | - Ryan Godsk Larsen
- Physical Activity and Performance Group, SMI, Department of Health Science and Technology, Aalborg University, Fredrik Bajers Vej 7, 9220 Aalborg, Denmark
| | - Jeppe Munthe Jensen
- Section of Sport Science, Department of Public Health, Aarhus University, Dalgas Avenue 4, 8000 Aarhus, Denmark
| | - Kristian Overgaard
- Section of Sport Science, Department of Public Health, Aarhus University, Dalgas Avenue 4, 8000 Aarhus, Denmark
| | - Mette Borre
- Department of Hepatology and Gastroenterology, Aarhus University Hospital, Nørrebrogade 44, 8000 Aarhus C, Denmark
| | - Cecilie Kyrø
- Unit of Diet, Genes and Environment, Danish Cancer Society Research Center, Strandboulevarden 49, 2100 Copenhagen, Denmark
| | - Rikard Landberg
- Food and Health, Department of Food Science, Swedish University of Agricultural Sciences, Almas Allé 5, 75007 Uppsala, Sweden
- Food and Nutrition Science, Department of Biology and Biotechnology, Chalmers University of Technology, SE-412 96, Gothenburg, Sweden
- Unit of Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institute, SE-171 77, Stockholm, Sweden
| | - Anja Olsen
- Unit of Diet, Genes and Environment, Danish Cancer Society Research Center, Strandboulevarden 49, 2100 Copenhagen, Denmark
| | - Anne Tjønneland
- Unit of Diet, Genes and Environment, Danish Cancer Society Research Center, Strandboulevarden 49, 2100 Copenhagen, Denmark
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Lind MV, Madsen ML, Rumessen JJ, Vestergaard H, Gøbel RJ, Hansen T, Lauritzen L, Pedersen OB, Kristensen M, Ross AB. Plasma Alkylresorcinols Reflect Gluten Intake and Distinguish between Gluten-Rich and Gluten-Poor Diets in a Population at Risk of Metabolic Syndrome. J Nutr 2016; 146:1991-1998. [PMID: 27629576 DOI: 10.3945/jn.116.236398] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 08/11/2016] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Many patients with celiac disease experience difficulties in adherence to a gluten-free diet. Methods for testing compliance to a gluten-free diet are costly and cumbersome. Thus, a simple biomarker of gluten intake is needed in a clinical setting and will be useful for epidemiologic studies investigating wider effects of gluten intake. OBJECTIVE The aim was to evaluate plasma total alkylresorcinol concentrations as a measure of gluten intake. METHODS In this randomized, controlled, crossover intervention study in 52 Danish adults with features of the metabolic syndrome, we compared 8 wk of a gluten-rich and gluten-poor diet separated by a washout period of ≥6 wk. We measured fasting plasma concentrations of alkylresorcinols to determine if they reflected differences in gluten intake as a secondary outcome of the original study. In addition, we investigated in 118 Danish adults the cross-sectional association between self-reported gluten intake and plasma alkylresorcinols in the same and a similar study at baseline. We used mixed-model ANCOVA for examining treatment effects, a classification tree to determine compliance to the gluten-poor diet, and linear regression models for examining baseline correlation between plasma alkylresorcinol concentrations and gluten intake. RESULTS Plasma total alkylresorcinols decreased more during the gluten-poor period (geometric mean: -124.8 nmol/L; 95% CI: -156.5, -93.0 nmol/L) than in the gluten-rich period (geometric mean: -31.8 nmol/L; 95% CI: -63.1, -0.4 nmol/L) (P < 0.001). On the basis of the plasma alkylresorcinol profile, we built a classification tree to objectively determine compliance and found an overall participant misclassification error of 3.9%. In the cross-sectional study we found a 5.6% (95% CI: 2.4%, 8.9%) increase in plasma total alkylresorcinols per 1-g increase in reported gluten intake (P < 0.001). CONCLUSION We propose the use of plasma alkylresorcinols to monitor compliance to a gluten-free diet as well as to help investigations into the possible effects of gluten in the wider population. This trial was registered at www.clinicaltrials.gov as NCT017119913 and NCT01731366.
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Affiliation(s)
- Mads V Lind
- Department of Nutrition, Exercise, and Sports, Faculty of Science, University of Copenhagen, Frederiksberg, Denmark; Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden;
| | - Mia L Madsen
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Section of Metabolic Genetics, Faculty of Health and Medical Sciences, and
| | - Jüri J Rumessen
- QD-Research Unit and Department of Gastroenterology, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark; and
| | - Henrik Vestergaard
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Section of Metabolic Genetics, Faculty of Health and Medical Sciences, and Steno Diabetes Center, Gentofte, Denmark
| | - Rikke J Gøbel
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Section of Metabolic Genetics, Faculty of Health and Medical Sciences, and
| | - Torben Hansen
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Section of Metabolic Genetics, Faculty of Health and Medical Sciences, and
| | - Lotte Lauritzen
- Department of Nutrition, Exercise, and Sports, Faculty of Science, University of Copenhagen, Frederiksberg, Denmark
| | - Oluf B Pedersen
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Section of Metabolic Genetics, Faculty of Health and Medical Sciences, and
| | - Mette Kristensen
- Department of Nutrition, Exercise, and Sports, Faculty of Science, University of Copenhagen, Frederiksberg, Denmark
| | - Alastair B Ross
- Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
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Biskup I, Kyrø C, Marklund M, Olsen A, van Dam RM, Tjønneland A, Overvad K, Lindahl B, Johansson I, Landberg R. Plasma alkylresorcinols, biomarkers of whole-grain wheat and rye intake, and risk of type 2 diabetes in Scandinavian men and women. Am J Clin Nutr 2016; 104:88-96. [PMID: 27281306 DOI: 10.3945/ajcn.116.133496] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 05/10/2016] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Studies that use dietary biomarkers to investigate the association between whole-grain intake and the risk of developing type 2 diabetes (T2D) are lacking. OBJECTIVE We examined the association between plasma total alkylresorcinols and the alkylresorcinol C17:0-to-C21:0 ratio, biomarkers of whole-grain wheat and rye intake and relative whole-grain rye over whole-grain wheat intake, respectively, and the risk of T2D among Scandinavian men and women. DESIGN A nested case-control study was established within the Northern Sweden Health and Disease Study and the Danish Diet, Cancer and Health cohort. Alkylresorcinol concentrations and the ratios of C17:0 to C21:0 were determined in plasma samples from 931 case-control pairs. ORs for T2D were calculated for plasma total alkylresorcinol concentration or C17:0-to-C21:0 ratio in quartiles with the use of conditional logistic regression that was adjusted for potential confounders. Additional analyses with whole-grain wheat and rye intake estimated from food-frequency questionnaires (FFQs) as exposures were also performed. RESULTS The plasma total alkylresorcinol concentration was not associated with T2D risk (OR: 1.34; 95% CI: 0.95, 1.88) for the highest compared with the lowest quartiles in multivariable adjusted models. However, the C17:0-to-C21:0 ratio was associated with a lower diabetes risk (OR: 0.54; 95% CI: 0.37, 0.78). Analyses with whole-grain intake estimated from FFQs yielded similar results. CONCLUSIONS Total whole-grain wheat and rye intake, reflected by alkylresorcinols in plasma, was not associated with a lower risk of T2D in a population with high whole-grain intake. In contrast, the proportion of whole-grain rye to whole-grain wheat intake, indicated by the plasma C17:0-to-C21:0 ratio, was inversely associated with T2D. This suggests that whole-grain intake dominated by rye may be favorable for T2D prevention.
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Affiliation(s)
- Izabela Biskup
- Department of Food Science, BioCenter, Swedish University of Agricultural Sciences, Uppsala, Sweden; Department of Pharmacognosy, Wroclaw Medical University, Wroclaw, Poland
| | - Cecilie Kyrø
- Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Matti Marklund
- Department of Public Health and Caring Sciences, Clinical Nutrition and Metabolism, Uppsala University, Uppsala, Sweden
| | - Anja Olsen
- Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Rob M van Dam
- Saw Swee Hock School of Public Health and Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore and National University Health System, Singapore; Department of Nutrition, Harvard T.H. Chan School of Public Health, Harvard University, Boston, MA
| | | | - Kim Overvad
- Department of Public Health, Section for Epidemiology, Aarhus University, Aarhus, Denmark
| | - Bernt Lindahl
- Departments of Public Health and Clinical Medicine and
| | | | - Rikard Landberg
- Department of Food Science, BioCenter, Swedish University of Agricultural Sciences, Uppsala, Sweden; Nutritional Epidemiology Unit, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
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Oskarsson A, Ohlsson Andersson Å. Suppressed Sex Hormone Biosynthesis by Alkylresorcinols: A Possible Link to Chemoprevention. Nutr Cancer 2016; 68:978-87. [DOI: 10.1080/01635581.2016.1190022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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29
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Damsgaard CT, Ritz C, Dalskov SM, Landberg R, Stark KD, Biltoft-Jensen A, Tetens I, Astrup A, Michaelsen KF, Lauritzen L. Associations between school meal-induced dietary changes and metabolic syndrome markers in 8–11-year-old Danish children. Eur J Nutr 2015; 55:1973-84. [DOI: 10.1007/s00394-015-1013-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Accepted: 08/05/2015] [Indexed: 12/22/2022]
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30
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Wierzbicka R, Wu H, Franek M, Kamal-Eldin A, Landberg R. Determination of alkylresorcinols and their metabolites in biological samples by gas chromatography-mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2015. [PMID: 26218771 DOI: 10.1016/j.jchromb.2015.07.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
High throughput GC-MS methods for quantification of alkylresorcinols (AR), biomarkers of whole grain wheat and rye intake, in plasma and adipose tissue and their metabolites in urine were developed and optimised. Alkylresorcinols in plasma (200μL) and adipose tissues (10-50mg) were extracted with diethyl ether, whereas main AR metabolites such as DHBA and DHPPA and newly identified metabolites in urine (50μL) were extracted with ethyl acetate after enzymatic deconjugation. All extracts were purified on OASIS-MAX solid phase extraction cartridges. Plasma and adipose tissue sample extracts were then derivatised with trifluoroacetic anhydride and reconstituted in undecane, whereas AR metabolites in urine samples were derivatised with BSTFA+TMCS (99:1, v/v, 100μL). Prepared samples were quantified by GC-MS (EI-SIM). Analysis of all compounds in the different matrices showed good selectivity, sensitivity, linearity, precision (<15% within and between batches), adequate recovery (75-108%), and short total run time (10-12min). The methods developed are applicable to large-scale sample sets such as epidemiological studies.
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Affiliation(s)
- Roksana Wierzbicka
- Department of Food Science, BioCenter, Swedish University of Agriculture Science, P.O. Box 7051, SE-75007 Uppsala, Sweden.
| | - Huaxing Wu
- Department of Food Science, BioCenter, Swedish University of Agriculture Science, P.O. Box 7051, SE-75007 Uppsala, Sweden.
| | - Milan Franek
- Department of Virology, Veterinary Research Institute, Hudcova 70, 62100 Brno, Czech Republic.
| | - Afaf Kamal-Eldin
- Department of Food Science, Faculty of Food and Agriculture, United Arab Emirates University, P.O. Box 17551, Al-Ain, United Arab Emirates.
| | - Rikard Landberg
- Department of Food Science, BioCenter, Swedish University of Agriculture Science, P.O. Box 7051, SE-75007 Uppsala, Sweden; Nutritional Epidemiology Unit, Institute of Environmental Medicine, Karolinska Institutet, P.O. Box 210, SE-171-77 Stockholm, Sweden.
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31
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Marklund M, Strömberg EA, Lærke HN, Knudsen KEB, Kamal-Eldin A, Hooker AC, Landberg R. Simultaneous pharmacokinetic modeling of alkylresorcinols and their main metabolites indicates dual absorption mechanisms and enterohepatic elimination in humans. J Nutr 2014; 144:1674-80. [PMID: 25332465 DOI: 10.3945/jn.114.196220] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Alkylresorcinols have proven to be useful biomarkers of whole-grain wheat and rye intake in many nutritional studies. To improve their utility, more knowledge regarding the fate of alkylresorcinols and their metabolites after consumption is needed. OBJECTIVE The objective of this study was to develop a combined pharmacokinetic model for plasma concentrations of alkylresorcinols and their 2 major metabolites, 3,5-dihydroxybenzoic acid (DHBA) and 3-(3,5-dihydroxyphenyl)-propanoic acid (DHPPA). METHODS The model was established by using plasma samples collected from 3 women and 2 men after a single dose (120 g) of rye bran and validated against fasting plasma concentrations from 8 women and 7 men with controlled rye bran intake (23, 45, or 90 g/d). Alkylresorcinols in the lymph and plasma of a pig fed a single alkylresorcinol dose (1.3 mmol) were quantified to assess absorption. Human ileostomal effluent and pig bile after high and low alkylresorcinol doses were analyzed to evaluate biliary alkylresorcinol metabolite excretion. RESULTS The model contained 2 absorption compartments: 1 that transferred alkylresorcinols directly to the systematic circulation and 1 in which a proportion of absorbed alkylresorcinols was metabolized before reaching the systemic circulation. Plasma concentrations of alkylresorcinols and their metabolites depended on absorption and formation, respectively, and the mean ± SEM terminal elimination half-life of alkylresorcinols (1.9 ± 0.59 h), DHPPA (1.5 ± 0.26 h), and DHBA (1.3 ± 0.22 h) did not differ. The model accurately predicted alkylresorcinol and DHBA concentrations after repeated alkylresorcinol intake but DHPPA concentration was overpredicted, possibly because of poorly modeled enterohepatic circulation. During the 8 h following administration, <2% of the alkylresorcinol dose was recovered in the lymph. DHPPA was identified in both human ileostomal effluent and pig bile, indicating availability of DHPPA for absorption and enterohepatic circulation. CONCLUSION Intact alkylresorcinols have advantages over DHBA and DHPPA as plasma biomarkers for whole-grain wheat and rye intake because of lower susceptibility to factors other than alkylresorcinol intake.
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Affiliation(s)
- Matti Marklund
- Department of Public Health and Caring Sciences, Clinical Nutrition and Metabolism, and
| | - Eric A Strömberg
- Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | - Helle N Lærke
- Department of Animal Science, Aarhus University, Tjele, Denmark
| | | | - Afaf Kamal-Eldin
- Department of Food Science, College of Food and Agriculture, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Andrew C Hooker
- Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | - Rikard Landberg
- Department of Food Science, BioCenter, Swedish University of Agricultural Sciences, Uppsala, Sweden; and Nutritional Epidemiology Unit, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
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32
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Magnusdottir OK, Landberg R, Gunnarsdottir I, Cloetens L, Åkesson B, Rosqvist F, Schwab U, Herzig KH, Hukkanen J, Savolainen MJ, Brader L, Hermansen K, Kolehmainen M, Poutanen K, Uusitupa M, Risérus U, Thorsdottir I. Whole grain rye intake, reflected by a biomarker, is associated with favorable blood lipid outcomes in subjects with the metabolic syndrome--a randomized study. PLoS One 2014; 9:e110827. [PMID: 25340768 PMCID: PMC4207773 DOI: 10.1371/journal.pone.0110827] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Accepted: 08/30/2014] [Indexed: 01/26/2023] Open
Abstract
Background and Aim Few studies have explored the possible plasma cholesterol lowering effects of rye consumption. The aim of this secondary analysis in the SYSDIET study was to investigate the association between plasma alkylresorcinols (AR), a biomarker for whole grain wheat and rye intake, and blood lipid concentrations in a population with metabolic syndrome. Furthermore, we analyzed the associations between the AR C17∶0/C21∶0 ratio, a suggested marker of the relative intake of whole grain/bran rye, and blood lipid concentrations. Methods Participants were 30–65 years of age, with body mass index (BMI) 27–40 kg/m2 and had metabolic syndrome. Individuals were recruited through six centers in the Nordic countries and randomized either to a healthy Nordic diet (ND, n = 93), rich in whole grain rye and wheat, as well as berries, fruits and vegetables, rapeseed oil, three fish meals per week and low-fat dairy products, or a control diet (n = 65) for 18/24 weeks. Associations between total plasma AR concentration and C17∶0/C21∶0 homologue ratio and blood lipids were investigated in pooled (ND + control group) regression analyses at 18/24 weeks adjusted for baseline value for the dependent variable, age, BMI and statin use. Results When adjusted for confounders, total plasma AR at 18/24 weeks was not significantly associated with blood lipids but the AR ratio C17∶0/C21∶0 was inversely associated with LDL cholesterol concentrations (B (95% CI): −0.41 (−0.80 to −0.02)), log LDL/HDL cholesterol ratio (−0.20 (−0.37 to −0.03)), log non-HDL cholesterol (−0.20 (−0.37 to −0.03)), log apolipoprotein B (−0.12 (−0.24 to 0.00)) and log triglyceride concentrations (−0.35 (−0.59 to −0.12)). Discussion Increased proportion of whole grain rye, reflected by a biomarker, in the diet is associated with favorable blood lipid outcomes, a relationship that should be further investigated. Trial Registration ClinicalTrials.gov NCT00992641
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Affiliation(s)
- Ola Kally Magnusdottir
- Unit for Nutrition Research, Landspitali -The National University Hospital of Iceland and Faculty of Food Science and Nutrition, School of Health Sciences, University of Iceland, Reykjavík, Iceland
- * E-mail:
| | - Rikard Landberg
- Department of Food Science, BioCenter, Swedish University of Agricultural Sciences, Uppsala, Sweden
- Division of Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Ingibjorg Gunnarsdottir
- Unit for Nutrition Research, Landspitali -The National University Hospital of Iceland and Faculty of Food Science and Nutrition, School of Health Sciences, University of Iceland, Reykjavík, Iceland
| | - Lieselotte Cloetens
- Biomedical Nutrition, Pure and Applied Biochemistry, Lund University, Lund, Sweden
| | - Björn Åkesson
- Biomedical Nutrition, Pure and Applied Biochemistry, Lund University, Lund, Sweden
- Department of Clinical Nutrition, Skåne University Hospital, Lund, Sweden
| | - Fredrik Rosqvist
- Department of Public Health and Caring Sciences, Clinical Nutrition and Metabolism, Uppsala University, Uppsala, Sweden
| | - Ursula Schwab
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
- Institute of Clinical Medicine, Internal Medicine, Kuopio University Hospital, Kuopio, Finland
| | - Karl-Heinz Herzig
- Institute of Biomedicine, Department of Physiology and Biocenter, Oulu University, Oulu, Finland and Department of Psychiatry, Kuopio University Hospital, Kuopio, Finland
| | - Janne Hukkanen
- Department of Internal Medicine and Biocenter, Institute of Clinical Medicine, University of Oulu, Oulu, Finland and Clinical Research Center, Oulu University Hospital, Oulu, Finland
| | - Markku J. Savolainen
- Department of Internal Medicine and Biocenter, Institute of Clinical Medicine, University of Oulu, Oulu, Finland and Clinical Research Center, Oulu University Hospital, Oulu, Finland
| | - Lea Brader
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Kjeld Hermansen
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Marjukka Kolehmainen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
- VTT Technical Research Centre of Finland, Espoo and Kuopio, Finland
| | - Kaisa Poutanen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
- VTT Technical Research Centre of Finland, Espoo and Kuopio, Finland
| | - Matti Uusitupa
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
- Research Unit, Kuopio University Hospital, Kuopio, Finland
| | - Ulf Risérus
- Department of Public Health and Caring Sciences, Clinical Nutrition and Metabolism, Uppsala University, Uppsala, Sweden
| | - Inga Thorsdottir
- Unit for Nutrition Research, Landspitali -The National University Hospital of Iceland and Faculty of Food Science and Nutrition, School of Health Sciences, University of Iceland, Reykjavík, Iceland
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Marklund M, Magnusdottir OK, Rosqvist F, Cloetens L, Landberg R, Kolehmainen M, Brader L, Hermansen K, Poutanen KS, Herzig KH, Hukkanen J, Savolainen MJ, Dragsted LO, Schwab U, Paananen J, Uusitupa M, Åkesson B, Thorsdottir I, Risérus U. A dietary biomarker approach captures compliance and cardiometabolic effects of a healthy Nordic diet in individuals with metabolic syndrome. J Nutr 2014; 144:1642-9. [PMID: 25080537 DOI: 10.3945/jn.114.193771] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Assessment of compliance with dietary interventions is necessary to understand the observed magnitude of the health effects of the diet per se. To avoid reporting bias, different dietary biomarkers (DBs) could be used instead of self-reported data. However, few studies investigated a combination of DBs to assess compliance and its influence on cardiometabolic risk factors. The objectives of this study were to use a combination of DBs to assess compliance and to investigate how a healthy Nordic diet (ND) influences cardiometabolic risk factors in participants with high apparent compliance compared with the whole study population. From a recently conducted isocaloric randomized trial, SYSDIET (Systems Biology in Controlled Dietary Interventions and Cohort Studies), in 166 individuals with metabolic syndrome, several DBs were assessed to reflect different key components of the ND: canola oil (serum phospholipid α-linolenic acid), fatty fish [eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA)], vegetables (plasma β-carotene), and whole grains (plasma alkylresorcinols). High-fat dairy intake (expectedly low in the ND) was reflected by serum pentadecanoic acid. All participants with biomarker data (n = 154) were included in the analyses. Biomarkers were combined by using a biomarker rank score (DB score) and principal component analysis (PCA). The DB score was then used to assess compliance. During the intervention, median concentrations of alkylresorcinols, α-linolenic acid, EPA, and DHA were >25% higher in the ND individuals than in the controls (P < 0.05), whereas median concentrations of pentadecanoic acid were 14% higher in controls (P < 0.05). Median DB score was 57% higher in the ND than in controls (P < 0.001) during the intervention, and participants were ranked similarly by DB score and PCA score. Overall, estimates of group difference in cardiometabolic effects generally appeared to be greater among compliant participants than in the whole study population (e.g., estimates of treatment effects on blood pressure and lipoproteins were ∼1.5- to 2-fold greater in the most compliant participants), suggesting that poor compliance attenuated the dietary effects. With adequate consideration of their limitations, DB combinations (e.g., DB score) could be useful for assessing compliance in intervention studies investigating cardiometabolic effects of healthy dietary patterns. The study was registered at clinicaltrials.gov as NCT00992641.
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Affiliation(s)
- Matti Marklund
- Department of Public Health and Caring Sciences, Clinical Nutrition and Metabolism, Uppsala University, Uppsala, Sweden
| | - Ola K Magnusdottir
- Unit for Nutrition Research, Landspitali, The National University of Iceland, Reykjavík, Iceland Faculty of Food Science and Nutrition and School of Health Sciences, University of Iceland, Reykjavík, Iceland
| | - Fredrik Rosqvist
- Department of Public Health and Caring Sciences, Clinical Nutrition and Metabolism, Uppsala University, Uppsala, Sweden
| | - Lieselotte Cloetens
- Biomedical Nutrition, Pure and Applied Biochemistry, Lund University, Lund, Sweden
| | - Rikard Landberg
- Department of Food Science, BioCenter, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Marjukka Kolehmainen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland VTT Technical Research Centre of Finland, Espoo, Finland
| | - Lea Brader
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Kjeld Hermansen
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Kaisa S Poutanen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland VTT Technical Research Centre of Finland, Espoo, Finland
| | - Karl-Heinz Herzig
- Institute of Biomedicine, Department of Physiology and Medical Research Center Oulu and
| | - Janne Hukkanen
- Institute of Clinical Medicine, Department of Internal Medicine, Biocenter Oulu, University of Oulu, Oulu, Finland Department of Internal Medicine, Oulu University Hospital, Oulu, Finland
| | - Markku J Savolainen
- Institute of Clinical Medicine, Department of Internal Medicine, Biocenter Oulu, University of Oulu, Oulu, Finland Department of Internal Medicine, Oulu University Hospital, Oulu, Finland
| | - Lars O Dragsted
- Department of Nutrition, Exercise, and Sports, University of Copenhagen, Frederiksberg, Denmark
| | - Ursula Schwab
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland Institute of Clinical Medicine, Internal Medicine and
| | - Jussi Paananen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
| | - Matti Uusitupa
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland Research Unit, Kuopio University Hospital, Kuopio, Finland
| | - Björn Åkesson
- Biomedical Nutrition, Pure and Applied Biochemistry, Lund University, Lund, Sweden
| | - Inga Thorsdottir
- Unit for Nutrition Research, Landspitali, The National University of Iceland, Reykjavík, Iceland Faculty of Food Science and Nutrition and School of Health Sciences, University of Iceland, Reykjavík, Iceland
| | - Ulf Risérus
- Department of Public Health and Caring Sciences, Clinical Nutrition and Metabolism, Uppsala University, Uppsala, Sweden
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Knudsen MD, Kyrø C, Olsen A, Dragsted LO, Skeie G, Lund E, Aman P, Nilsson LM, Bueno-de-Mesquita HB, Tjønneland A, Landberg R. Self-reported whole-grain intake and plasma alkylresorcinol concentrations in combination in relation to the incidence of colorectal cancer. Am J Epidemiol 2014; 179:1188-96. [PMID: 24699786 DOI: 10.1093/aje/kwu031] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Self-reported food frequency questionnaires (FFQs) have occasionally been used to investigate the association between whole-grain intake and the incidence of colorectal cancer, but the results from those studies have been inconsistent. We investigated this association using intakes of whole grains and whole-grain products measured via FFQs and plasma alkylresorcinol concentrations, a biomarker of whole-grain wheat and rye intake, both separately and in combination (Howe's score with ranks). We conducted a nested case-control study in a cohort from a research project on Nordic health and whole-grain consumption (HELGA, 1992-1998). Incidence rate ratios and 95% confidence intervals were calculated using conditional logistic regression. Plasma alkylresorcinol concentrations alone and Howe's score with ranks were inversely associated with the incidence of distal colon cancer when the highest quartile was compared with the lowest (for alkylresorcinol concentrations, incidence rate ratio = 0.34, 95% confidence interval: 0.13, 0.92; for Howe's score with ranks, incidence rate ratio = 0.35, 95% confidence interval: 0.15, 0.86). No association was observed between whole-grain intake and any colorectal cancer (colon, proximal, distal or rectum cancer) when using an FFQ as the measure/exposure variable for whole-grain intake. The results suggest that assessing whole-grain intake using a combination of FFQs and biomarkers slightly increases the precision in estimating the risk of colon or rectal cancer by reducing the impact of misclassification, thereby increasing the statistical power of the study.
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Mulyukin AL, Suzina NE, Mel’nikov VG, Gal’chenko VF, El’-Registan GI. Dormant state and phenotypic variability of Staphylococcus aureus and Corynebacterium pseudodiphtheriticum. Microbiology (Reading) 2014. [DOI: 10.1134/s0026261713060088] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Stasiuk M, Janiszewska A, Kozubek A. Phenolic lipids affect the activity and conformation of acetylcholinesterase from Electrophorus electricus (Electric eel). Nutrients 2014; 6:1823-31. [PMID: 24787269 PMCID: PMC4042574 DOI: 10.3390/nu6051823] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Revised: 03/12/2014] [Accepted: 04/03/2014] [Indexed: 12/16/2022] Open
Abstract
Phenolic lipids were isolated from rye grains, cashew nutshell liquid (CNSL) from Anacardium occidentale, and fruit bodies of Merrulius tremellosus, and their effects on the electric eel acetylcholinesterase activity and conformation were studied. The observed effect distinctly depended on the chemical structure of the phenolic lipids that were available for interaction with the enzyme. All of the tested compounds reduced the activity of acetylcholinesterase. The degree of inhibition varied, showing a correlation with changes in the conformation of the enzyme tested by the intrinsic fluorescence of the Trp residues of the protein.
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Affiliation(s)
- Maria Stasiuk
- Department of Lipids and Liposomes, Faculty of Biotechnology, University of Wroclaw, Joliot-Curie 14a, Wroclaw 50-383, Poland.
| | - Alicja Janiszewska
- Department of Lipids and Liposomes, Faculty of Biotechnology, University of Wroclaw, Joliot-Curie 14a, Wroclaw 50-383, Poland.
| | - Arkadiusz Kozubek
- Department of Lipids and Liposomes, Faculty of Biotechnology, University of Wroclaw, Joliot-Curie 14a, Wroclaw 50-383, Poland.
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Landberg R, Marklund M, Kamal-Eldin A, Åman P. An update on alkylresorcinols – Occurrence, bioavailability, bioactivity and utility as biomarkers. J Funct Foods 2014. [DOI: 10.1016/j.jff.2013.09.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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38
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Magnusdottir OK, Landberg R, Gunnarsdottir I, Cloetens L, Akesson B, Landin-Olsson M, Rosqvist F, Iggman D, Schwab U, Herzig KH, Savolainen MJ, Brader L, Hermansen K, Kolehmainen M, Poutanen K, Uusitupa M, Thorsdottir I, Risérus U. Plasma alkylresorcinols C17:0/C21:0 ratio, a biomarker of relative whole-grain rye intake, is associated to insulin sensitivity: a randomized study. Eur J Clin Nutr 2014; 68:453-8. [PMID: 24549027 DOI: 10.1038/ejcn.2014.12] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Revised: 12/06/2013] [Accepted: 01/04/2014] [Indexed: 12/11/2022]
Abstract
BACKGROUND/OBJECTIVES Few studies have used biomarkers of whole-grain intake to study its relation to glucose metabolism. We aimed to investigate the association between plasma alkylresorcinols (AR), a biomarker of whole-grain rye and wheat intake, and glucose metabolism in individuals with metabolic syndrome (MetS). SUBJECTS/METHODS Participants were 30-65 years of age, with body mass index 27-40 kg/m(2) and had MetS without diabetes. Individuals were recruited through six centers in the Nordic countries and randomized to a healthy Nordic diet (ND, n=96), rich in whole-grain rye and wheat, or a control diet (n=70), for 18-24 weeks. In addition, associations between total plasma AR concentration and C17:0/C21:0 homolog ratio as an indication of the relative whole-grain rye intake, and glucose metabolism measures from oral glucose tolerance tests were investigated in pooled (ND+control) regression analyses at 18/24 weeks. RESULTS ND did not improve glucose metabolism compared with control diet, but the AR C17:0/C21:0 ratio was inversely associated with fasting insulin concentrations (P=0.002) and positively associated with the insulin sensitivity indices Matsuda ISI (P=0.026) and disposition index (P=0.022) in pooled analyses at 18/24 weeks, even after adjustment for confounders. The AR C17:0/C21:0 ratio was not significantly associated with insulin secretion indices. Total plasma AR concentration was not related to fasting plasma glucose or fasting insulin at 18/24 weeks. CONCLUSIONS The AR C17:0/C21:0 ratio, an indicator of relative whole-grain rye intake, is associated with increased insulin sensitivity in a population with MetS.
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Affiliation(s)
- O K Magnusdottir
- 1] Unit for Nutrition Research, Landspitali-The National University Hospital of Iceland, Reykjavík, Iceland [2] Faculty of Food Science and Nutrition and School of Health Sciences, University of Iceland, Reykjavík, Iceland
| | - R Landberg
- 1] Department of Food Science, BioCenter, Swedish University of Agricultural Sciences, Uppsala, Sweden [2] Division of Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - I Gunnarsdottir
- 1] Unit for Nutrition Research, Landspitali-The National University Hospital of Iceland, Reykjavík, Iceland [2] Faculty of Food Science and Nutrition and School of Health Sciences, University of Iceland, Reykjavík, Iceland
| | - L Cloetens
- Biomedical Nutrition, Pure and Applied Biochemistry, Lund University, Lund, Sweden
| | - B Akesson
- 1] Biomedical Nutrition, Pure and Applied Biochemistry, Lund University, Lund, Sweden [2] Department of Clinical Nutrition, Skåne University Hospital, Lund, Sweden
| | - M Landin-Olsson
- Department of Endocrinology, Skåne University Hospital, Lund, Sweden
| | - F Rosqvist
- Department of Public Health and Caring Sciences, Clinical Nutrition and Metabolism, Uppsala University, Uppsala, Sweden
| | - D Iggman
- 1] Department of Public Health and Caring Sciences, Clinical Nutrition and Metabolism, Uppsala University, Uppsala, Sweden [2] Center for Clinical Research Dalarna, Falun, Sweden
| | - U Schwab
- 1] Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland [2] Institute of Clinical Medicine, Internal Medicine, Kuopio University Hospital, Kuopio, Finland
| | - K-H Herzig
- 1] Department of Physiology and Biocenter of Oulu, Institute of Biomedicine, Oulu University, Oulu, Finland [2] Department of Psychiatry, Kuopio University Hospital, Kuopio, Finland
| | - M J Savolainen
- 1] Department of Internal Medicine and Biocenter Oulu, Institute of Clinical Medicine, University of Oulu, Oulu, Finland [2] Clinical Research Center, Oulu University Hospital, Oulu, Finland
| | - L Brader
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - K Hermansen
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - M Kolehmainen
- 1] Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland [2] VTT, Technical Research Centre of Finland, Espoo and Kuopio, Kuopio, Finland
| | - K Poutanen
- 1] Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland [2] VTT, Technical Research Centre of Finland, Espoo and Kuopio, Kuopio, Finland
| | - M Uusitupa
- 1] Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland [2] Research Unit, Kuopio University Hospital, Kuopio, Finland
| | - I Thorsdottir
- 1] Unit for Nutrition Research, Landspitali-The National University Hospital of Iceland, Reykjavík, Iceland [2] Faculty of Food Science and Nutrition and School of Health Sciences, University of Iceland, Reykjavík, Iceland
| | - U Risérus
- Department of Public Health and Caring Sciences, Clinical Nutrition and Metabolism, Uppsala University, Uppsala, Sweden
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Marklund M, Strömberg EA, Hooker AC, Hammarlund-Udenaes M, Aman P, Landberg R, Kamal-Eldin A. Chain length of dietary alkylresorcinols affects their in vivo elimination kinetics in rats. J Nutr 2013; 143:1573-8. [PMID: 23946349 DOI: 10.3945/jn.113.178392] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Two phenolic acids, 3,5-dihydroxybenzoic acid (DHBA) and 3-(3,5-dihydroxyphenyl)- propanoic acid (DHPPA), are the major metabolites of cereal alkylresorcinols (ARs). Like their precursors, AR metabolites have been suggested as biomarkers for intake of whole-grain wheat and rye and as such could aid the understanding of diet-disease associations. This study estimated and compared pharmacokinetic parameters of ARs and their metabolites in rats and investigated differences in metabolite formation after ingestion of different AR homologs. Rats were i.v. infused for 30 min with 2, 12, or 23 μmol/kg DHBA or DHPPA or orally given the same amounts of the AR homologs, C17:0 and C25:0. Repeated plasma samples, obtained from rats for 6 h (i.v.) or 36 h (oral), were simultaneously analyzed for ARs and their metabolites by GC-mass spectrometry. Pharmacokinetic parameters were estimated by population-based compartmental modeling and noncompartmental calculation. A 1-compartment model best described C25:0 pharmacokinetics, whereas C17:0 and AR metabolites best fitted 2-compartment models. Combined models for simultaneous prediction of AR and metabolite concentration were more complex, with less reliable estimates of pharmacokinetic parameters. Although the AUC of C17:0 was lower than that of C25:0 (P < 0.05), the total amount and composition of AR metabolites did not differ between rats given C17:0 or C25:0. The elimination half-life of ARs and their metabolites increased with length of the side chain (P-trend < 0.001) and ranged from 1.2 h (DHBA) to 8.8 h (C25:0). The formation of AR metabolites was slower than their elimination, indicating that the rate of AR metabolism and not excretion of DHBA and DHPPA determines their plasma concentrations in rats.
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Affiliation(s)
- Matti Marklund
- Department of Food Science, Swedish University of Agricultural Sciences, Uppsala, Sweden
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40
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Magnusdottir OK, Landberg R, Gunnarsdottir I, Cloetens L, Åkesson B, Önning G, Jonsdottir SE, Rosqvist F, Schwab U, Herzig KH, Savolainen MJ, Brader L, Hermansen K, Kolehmainen M, Poutanen K, Uusitupa M, Thorsdottir I, Risérus U. Plasma alkylresorcinols reflect important whole-grain components of a healthy Nordic diet. J Nutr 2013; 143:1383-90. [PMID: 23843473 DOI: 10.3945/jn.113.175588] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Biomarkers of dietary intake can be important tools in nutrition research. Our aim was to assess whether plasma alkylresorcinol (AR) and β-carotene concentrations could be used as dietary biomarkers for whole-grain, fruits and vegetables in a healthy Nordic diet (ND). Participants (n = 166), 30-65 y with a body mass index of 27-40 kg/m(2) and two more features of metabolic syndrome (International Diabetes Federation definition, slightly modified), were recruited through six centers in the Nordic countries and randomly assigned to an ND or control diet for 18 or 24 wk, depending on study center. Plasma AR and β-carotene were analyzed and nutrient intake calculated from 4-d food records. Median fiber intake increased in the ND group from 2.5 g/MJ at baseline to 4.1 g/MJ (P < 0.001) at end point (week 18 or 24), and median (IQR) fasting plasma total AR concentration increased from 73 (88) to 106 (108) nmol/L, or 45%, from baseline to end point (P < 0.001). The AR concentration was significantly higher in the ND group (P < 0.001) than in the control group at end point. β-Carotene intake tended to increase in the ND group (P = 0.07), but the plasma β-carotene concentration did not change significantly throughout the study and did not differ between the groups at follow-up. In conclusion, an ND resulted in higher dietary fiber intake and increased plasma total AR concentration compared with the control diet, showing that the total AR concentration might be a valid biomarker for an ND in which whole-grain wheat and rye are important components. No significant difference in plasma β-carotene concentrations was observed between the ND and control groups, suggesting that β-carotene may not be a sensitive enough biomarker of the ND.
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Affiliation(s)
- Ola Kally Magnusdottir
- Unit for Nutrition Research, Landspitali, The National University of Iceland, Faculty of Food Science and Nutrition and School of Health Sciences, University of Iceland, Reykjavík, Iceland
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41
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Belobrajdic DP, Bird AR. The potential role of phytochemicals in wholegrain cereals for the prevention of type-2 diabetes. Nutr J 2013; 12:62. [PMID: 23679924 PMCID: PMC3658901 DOI: 10.1186/1475-2891-12-62] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 04/24/2013] [Indexed: 01/18/2023] Open
Abstract
Diets high in wholegrains are associated with a 20-30% reduction in risk of developing type-2 diabetes (T2D), which is attributed to a variety of wholegrain components, notably dietary fibre, vitamins, minerals and phytochemicals. Most phytochemicals function as antioxidants in vitro and have the potential to mitigate oxidative stress and inflammation which are implicated in the pathogenesis of T2D. In this review we compare the content and bioavailability of phytochemicals in wheat, barley, rice, rye and oat varieties and critically evaluate the evidence for wholegrain cereals and cereal fractions increasing plasma phytochemical concentrations and reducing oxidative stress and inflammation in humans. Phytochemical content varies considerably within and among the major cereal varieties. Differences in genetics and agro-climatic conditions explain much of the variation. For a number of the major phytochemicals, such as phenolics and flavanoids, their content in grains may be high but because these compounds are tightly bound to the cell wall matrix, their bioavailability is often limited. Clinical trials show that postprandial plasma phenolic concentrations are increased after consumption of wholegrain wheat or wheat bran however the magnitude of the response is usually modest and transient. Whether this is sufficient to bolster antioxidant defences and translates into improved health outcomes is still uncertain. Increased phytochemical bioavailability may be achieved through bio-processing of grains but the improvements so far are small and have not yet led to changes in clinical or physiological markers associated with reduced risk of T2D. Furthermore, the effect of wholegrain cereals and cereal fractions on biomarkers of oxidative stress or strengthening antioxidant defence in healthy individuals is generally small or nonexistent, whereas biomarkers of systemic inflammation tend to be reduced in people consuming high intakes of wholegrains. Future dietary intervention studies seeking to establish a direct role of phytochemicals in mediating the metabolic health benefits of wholegrains, and their potential for mitigating disease progression, should consider using varieties that deliver the highest possible levels of bioavailable phytochemicals in the context of whole foods and diets. Both postprandial and prolonged responses in systemic phytochemical concentrations and markers of inflammation and oxidative stress should be assessed along with changes related to health outcomes in healthy individuals as well as those with metabolic disease.
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Affiliation(s)
- Damien P Belobrajdic
- Commonwealth Scientific & Industrial Research Organisation-CSIRO, Food Futures National Flagship, GPO BOX 10041, Adelaide, SA 5000, Australia.
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42
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Marklund M, McKeown NM, Blumberg JB, Chen CYO. Hepatic biotransformation of alkylresorcinols is mediated via cytochrome P450 and β-oxidation: a proof of concept study. Food Chem 2013; 139:925-30. [PMID: 23561191 DOI: 10.1016/j.foodchem.2013.01.122] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 01/29/2013] [Accepted: 01/31/2013] [Indexed: 01/27/2023]
Abstract
Alkylresorcinols (AR) are phenolic lipids present in the bran of some cereals. AR may serve as a biomarker for whole grain wheat and rye intake. While AR pharmacokinetics and two major metabolites have been reported, the metabolic pathways contributing to their relatively rapid elimination from the circulation remain to be speculative. In this study, we investigated if ω- and β-oxidation mediate catabolism of the AR homologue C19:0 to form 3,5-dihydroxybenzoic acid and 3-(3,5-dihydroxyphenyl)-1-propanoic acid (DHPPA), using 3 in vitro platforms, human cytochrome P450 4F2 (CYP4F2), human liver S9, and HepG2 cells. One hydroxylated C19:0 metabolite was formed by CYP4F2 and one hydroxylated and one carboxylated C19:0 were tentatively identified after incubation of AR with S9. The formation of DHPPA was quantifiable when HepG2 cells were treated with C19:0 for 48 h. Our results are consistent with a metabolic pathway by which AR are degraded to phenolic acids via CYP4F2-mediated ω-oxidation and subsequent β-oxidation.
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Affiliation(s)
- Matti Marklund
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, 711 Washington Street, Boston, MA 02111, USA
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43
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Landberg R, Aman P, Hallmans G, Johansson I. Long-term reproducibility of plasma alkylresorcinols as biomarkers of whole-grain wheat and rye intake within Northern Sweden Health and Disease Study Cohort. Eur J Clin Nutr 2013; 67:259-63. [PMID: 23388668 DOI: 10.1038/ejcn.2013.10] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND/OBJECTIVES Alkylresorcinols (AR) have been suggested as specific biomarkers of whole-grain (WG) and bran intake from wheat and rye. Before using plasma AR as biomarkers in prospective cohort studies, the long-term reproducibility needs to be determined in order to judge how well a single plasma sample reflects the long-term concentration. The objective was therefore to estimate the reproducibility of plasma AR concentrations over 0.1-3.9 years. SUBJECTS/METHODS The concentrations of AR homologues were analysed in plasma samples, drawn>8 h since last meal, 0.1-3.9 years apart (mean ≈ 2 years) in 74 participants in the Swedish prospective Västerbotten Intervention Project cohort. Reproducibility was estimated by calculating the intra class correlation coefficient (ICC). RESULTS Fasting plasma AR concentrations were similar between the first and second measurements. The ICC for total AR was 0.54 (95% confidence interval (CI)=0.38-0.69] overall, 0.34 (95% CI=0.13-0.64) for men and 0.73 (95% CI=0.56-0.85) for women, respectively. Somewhat higher ICCs were obtained for shorter AR homologues. CONCLUSION In summary, the reproducibility of plasma AR over 0.1-3.9 years was high for women and moderate for men within this population. Together with previous data showing high validity of plasma AR as biomarkers of wheat and rye in different populations, the current finding suggest that this biomarker is stable over a long-time period and is therefore probably useful for assessment of long-term WG intake in populations with a wide intake range and a frequent intake.
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Affiliation(s)
- R Landberg
- Department of Food Science, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden.
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Hedrick VE, Dietrich AM, Estabrooks PA, Savla J, Serrano E, Davy BM. Dietary biomarkers: advances, limitations and future directions. Nutr J 2012; 11:109. [PMID: 23237668 PMCID: PMC3568000 DOI: 10.1186/1475-2891-11-109] [Citation(s) in RCA: 169] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Accepted: 12/12/2012] [Indexed: 01/24/2023] Open
Abstract
The subjective nature of self-reported dietary intake assessment methods presents numerous challenges to obtaining accurate dietary intake and nutritional status. This limitation can be overcome by the use of dietary biomarkers, which are able to objectively assess dietary consumption (or exposure) without the bias of self-reported dietary intake errors. The need for dietary biomarkers was addressed by the Institute of Medicine, who recognized the lack of nutritional biomarkers as a knowledge gap requiring future research. The purpose of this article is to review existing literature on currently available dietary biomarkers, including novel biomarkers of specific foods and dietary components, and assess the validity, reliability and sensitivity of the markers. This review revealed several biomarkers in need of additional validation research; research is also needed to produce sensitive, specific, cost-effective and noninvasive dietary biomarkers. The emerging field of metabolomics may help to advance the development of food/nutrient biomarkers, yet advances in food metabolome databases are needed. The availability of biomarkers that estimate intake of specific foods and dietary components could greatly enhance nutritional research targeting compliance to national recommendations as well as direct associations with disease outcomes. More research is necessary to refine existing biomarkers by accounting for confounding factors, to establish new indicators of specific food intake, and to develop techniques that are cost-effective, noninvasive, rapid and accurate measures of nutritional status.
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Affiliation(s)
- Valisa E Hedrick
- Department of Human Nutrition, Foods and Exercise, 221 Wallace Hall (0430), Virginia Tech, Blacksburg, Virginia 24061, USA.
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45
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Ma J, Ross AB, Shea MK, Bruce SJ, Jacques PF, Saltzman E, Lichtenstein AH, Booth SL, McKeown NM. Plasma alkylresorcinols, biomarkers of whole-grain intake, are related to lower BMI in older adults. J Nutr 2012; 142:1859-64. [PMID: 22955514 PMCID: PMC3442796 DOI: 10.3945/jn.112.163253] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Alkylresorcinols (AR) are phenolic lipids found in the bran fraction of whole-grain wheat, rye, and barley. In intervention studies, plasma AR concentration increased in response to greater intakes of whole grain, wheat, and rye. This study examined the cross-sectional associations between plasma AR and habitual whole-grain intake, BMI, and metabolic risk factors in 407 free-living older adults (166 men and 241 women; aged 60-81y; median BMI: 27 kg/m(2)). Plasma AR were measured by liquid chromatography-tandem MS, and whole-grain intakes were estimated by using an FFQ. After adjustment for fasting TG concentrations, median plasma AR concentrations across quartile categories of AR were 5, 14, 27, and 62 nmol/L, respectively. Spearman correlation coefficients between plasma AR and whole-grain wheat-rich foods and total bran intake were 0.31 and 0.27, respectively (both P < 0.0001). After adjustment for multiple covariates, the geometric means of BMI in the lowest and highest quartile category of plasma AR were 27.6 and 26.7 kg/m(2), respectively (P-trend = 0.04). No associations were observed between plasma AR and glucose and insulin. Our study shows a dose-dependent relationship between whole-grain intake and plasma AR and confirms the previously observed inverse relationship between whole-grain intake and BMI using an independent biomarker of whole-grain wheat intake.
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Affiliation(s)
- Jiantao Ma
- Nutrition Epidemiology Program, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA
| | | | - M. Kyla Shea
- Wake Forest University Baptist Medical Center, Section of Gerontology, Sticht Center on Aging, Winston-Salem, NC; and
| | | | - Paul F. Jacques
- Nutrition Epidemiology Program, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA
| | - Edward Saltzman
- Energy Metabolism Program, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA
| | - Alice H. Lichtenstein
- Cardiovascular Nutrition Program, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA, and
| | - Sarah L. Booth
- Vitamin K Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA
| | - Nicola M. McKeown
- Nutrition Epidemiology Program, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA,To whom correspondence should be addressed. E-mail:
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Marklund M, Landberg R, Andersson R, Aman P, Kamal-Eldin A. Alkylresorcinol metabolism in Swedish adults is affected by factors other than intake of whole-grain wheat and rye. J Nutr 2012; 142:1479-86. [PMID: 22739366 DOI: 10.3945/jn.112.159244] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The urinary alkylresorcinol (AR) metabolites, 3,5-dihydroxybenzoic acid (DHBA) and 3-(3,5-dihydroxyphenyl)-propanoic acid (DHPPA), could potentially serve as biomarkers for intake of whole-grain (WG) wheat and rye. Excretion of AR metabolites is largely dependent on the intake of AR but may also be influenced by other factors. This study aimed to investigate the validity of free and conjugated AR metabolites as biomarkers for WG intake of wheat and rye and to identify potential determinants of AR metabolites in urine. We quantified free aglycones and conjugates of AR metabolites in 24-h urine collections from 52 free-living Swedish adults and calculated correlation coefficients between urinary AR metabolite excretion and self-reported WG intake. We used partial least-squares regression to identify possible determinants of urinary AR metabolites. Approximately 50% of urinary AR metabolites were found as conjugates. Excretions of individually quantified free and conjugated AR metabolites and their sums were correlated to self-reported intake of WG rye and wheat (r = 0.50-0.68; P < 0.001). Excretion of urinary AR metabolites was mainly dependent on intake of 2 major dietary AR homologs, C19:0 and C21:0. Sex, BMI, and vitamin C intake were identified as determinants of the proportion of free and glucuronidated DHPPA in the present study. Urinary AR metabolites may be useful in reflecting short-term to medium-term intake of WG, but urine samples should be deconjugated prior to quantification. Anthropometric and dietary factors affecting the proportion of conjugated AR metabolites in urine may to some extent influence AR elimination and thereby the performance of urinary AR metabolites as biomarkers.
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Affiliation(s)
- Matti Marklund
- Department of Food Science, BioCenter, Swedish University of Agricultural Sciences, Uppsala, Sweden.
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Meija L, Samaletdin A, Koskela A, Lejnieks A, Lietuvietis V, Adlercreutz H. Alkylresorcinols in Latvian and Finnish breads. Int J Food Sci Nutr 2012; 64:117-21. [PMID: 22816971 DOI: 10.3109/09637486.2012.706599] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The alkylresorcinol (AR) content and relative homologue composition were determined in 9 Latvian and 11 Finnish soft breads. ARs were extracted with hot 1-propanol and quantified, using a gas chromatography-mass spectrometry method. The total AR content (μg/g dry matter) varied from 560 to 840 in rye breads, from 500 to 700 in Finnish mixed rye and wheat flour breads, from 200 to 300 in Latvian mixed rye and wheat flour breads and from 25 to 30 in white wheat breads. Rye and white wheat breads in the two countries varied only slightly in AR content, but there were wide variations in AR content in mixed flour breads. The AR contents in soft breads could be indicators of bran or fibre content, but not of whole-grain flour content.
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Brouns F, Hemery Y, Price R, Anson NM. Wheat Aleurone: Separation, Composition, Health Aspects, and Potential Food Use. Crit Rev Food Sci Nutr 2012; 52:553-68. [DOI: 10.1080/10408398.2011.589540] [Citation(s) in RCA: 123] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Alkylresorcinol metabolites in urine correlate with the intake of whole grains and cereal fibre in free-living Swedish adults. Br J Nutr 2012; 109:129-36. [PMID: 22470195 DOI: 10.1017/s0007114512000621] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Alkylresorcinols (AR) have been established as short/medium-term biomarkers for whole grain (WG) wheat and rye intake; and AR metabolites, 3,5-dihydroxybenzoic acid and 3-(3,5-dihydroxyphenyl)-propanoic acid, have been suggested as complementary biomarkers to AR. The present study examined the medium-term reproducibility and relative validity of urinary AR metabolites as biomarkers for WG and cereal fibre intake. A total of sixty-six free-living Swedes completed 3 d weighed food records and provided single 24 h urine collections and morning urine spot samples on two occasions, 2-3 months apart. The medium-term reproducibility of urinary AR metabolites was moderate when assessed in 24 h collections and lower in creatinine (CR)-adjusted morning urine. Mean AR metabolite 24 h excretions correlated well with total WG (r(s) 0·31-0·52, P < 0·05) and cereal fibre (r(s) 0·46-0·58, P < 0·001) intake on both occasions. As expected, correlations with WG (r(s) 0·28-0·38, P < 0·05) and cereal fibre (r(s) 0·35-0·42, P < 0·01) were weaker for mean CR-adjusted AR metabolite concentrations in spot samples of morning urine, although the adjusted concentrations correlated well with 24 h urinary excretion (r(s) 0·69-0·73, P < 0·001). Adjustment for intra-individual variations substantially improved the correlations between intake and excretion. These findings suggest that urinary AR metabolites can successfully reflect the medium-term intake of WG and cereal fibre when adjusted for intra-individual variation in this population, where rye was the major contributor to high WG intake. The performance of urinary AR metabolites as medium-term biomarkers appears to be comparable to that of fasting plasma AR concentration in this population.
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Rye bread intake improves oxidation resistance of LDL in healthy humans. Atherosclerosis 2012; 221:583-6. [DOI: 10.1016/j.atherosclerosis.2012.01.030] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Revised: 12/09/2011] [Accepted: 01/18/2012] [Indexed: 11/23/2022]
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