DOCSLIB.ORG

Alkylresorcinols As Biomarkers of Whole-Grain Intake

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Alkylresorcinols As Biomarkers of Whole-Grain Intake University of Rhode Island DigitalCommons@URI Open Access Master's Theses 2016 Alkylresorcinols as Biomarkers of Whole-Grain Intake Michael Robert MacArthur University of Rhode Island, [email protected] Follow this and additional works at: https://digitalcommons.uri.edu/theses Recommended Citation MacArthur, Michael Robert, "Alkylresorcinols as Biomarkers of Whole-Grain Intake" (2016). Open Access Master's Theses. Paper 858. https://digitalcommons.uri.edu/theses/858 This Thesis is brought to you for free and open access by DigitalCommons@URI. It has been accepted for inclusion in Open Access Master's Theses by an authorized administrator of DigitalCommons@URI. For more information, please contact [email protected]. ALKYLRESORCINOLS AS BIOMARKERS OF WHOLE-GRAIN INTAKE BY MICHAEL ROBERT MACARTHUR A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN NUTRITION AND FOOD SCIENCES UNIVERSITY OF RHODE ISLAND 2016 MASTER OF SCIENCE THESIS OF MICHAEL ROBERT MACARTHUR APPROVED: Thesis Committee: Major Professor: Ingrid Lofgren Cathy English Angela Slitt Nasser H. Zawia DEAN OF THE GRADUATE SCHOOL UNIVERSITY OF RHODE ISLAND 2016 ABSTRACT Background: In order to attenuate the measurement error inherent in dietary recall methods, alkylresorcinols (ARs) have been proposed as a biomarker of whole-grain (WG) intake (1, 2). Although ARs have shown promise in experimental (3) and observational studies (4), most of this research has been conducted in Nordic populations that consume relatively high amounts of WG (5). Objectives: The objectives of this study were to assess the utility of plasma AR concentration as a WG intake biomarker and identify the primary dietary and non- dietary determinants of plasma AR concentration in a population that consumes relatively few WG. Methods: This ancillary study used data from first-year college students (n=122) who completed three interviewer-administered 24-hour recalls and had two fasting venous blood draws performed on non-consecutive days. Dietary data was compiled using the Nutrition Data System for Research (6). Blood lipids and glucose were determined via enzymatic assay and plasma AR concentrations were determined by gas chromatography-mass spectrometry (7). Correlation coefficients (rs) were calculated between plasma AR concentrations and dietary intake variables and cardiometabolic risk factors. One-way ANOVA and Tukey’s post-hoc test were used to assess group differences across plasma AR quartiles. Determinants of plasma AR concentration were assessed using multiple regression models. Statistical analyses were performed using R version 3.2.3. Results: Plasma AR concentration was significantly positively correlated with WG intake (rs = 0.24, p <0.01). The correlation was stronger in males (n=36, rs = 0.33, p < 0.05) than females (n=86, rs = 0.18, p = 0.08). One-way ANOVA across plasma AR quartiles was significant for fiber intake [F(3,118) = 8.58, p < 0.001] and Tukey’s HSD test showed that the mean daily fiber intake for the highest AR quartile was significantly greater than for the lowest (M = 20.2 ± 1.9 g, 14.7 ± 1.4 g respectively). The only cardiometabolic risk factor that was significantly associated with plasma AR concentration was triglycerides (rs = 0.27, p < 0.01). Multiple regression models including log-transformed dietary variables showed that WG bread was the only significant food-item predictor of plasma AR concentration (β = 0.54, p < 0.01). Conclusions: Although plasma AR concentration was significantly associated with WG and fiber intake, triglycerides were the primary determinant and the relationships were not strong enough to produce accurate WG intake prediction models. More research is needed on the use of AR as a quantitative biomarker in low WG- consuming populations. ACKNOWLEDGEMENTS I would like to thank my major advisor Ingrid Lofgren for everything over the past two years. I am grateful for all that you’ve taught me and for your support during tough times. I would also like to thank all the NFS grad students for the support and fun times. We pulled each other through and your friendship means a lot. Thanks to the Lipid Lab undergraduate researchers for showing me the ropes when I first got to URI and for the invaluable help on all our projects, from data entry to Cholestech. Finally, I’d like to thank my family for the unconditional love and support that has kept me going throughout the program. iv TABLE OF CONTENTS ABSTRACT .................................................................................................................. ii ACKNOWLEDGEMENTS ........................................................................................ iv TABLE OF CONTENTS ............................................................................................. v LIST OF TABLES ...................................................................................................... vi LIST OF FIGURES ................................................................................................... vii MANUSCRIPT ............................................................................................................. 1 INTRODUCTION ...................................................................................................... 1 MATERIALS AND METHODS ............................................................................... 2 RESULTS ................................................................................................................... 5 DISCUSSION ............................................................................................................ 8 CONCLUSION ........................................................................................................ 11 ACKNOWLEDGEMENTS ..................................................................................... 12 TABLES AND FIGURES ........................................................................................ 13 REFERENCES ......................................................................................................... 23 APPENDIX A: LITERATURE REVIEW ............................................................... 28 BIBLIOGRAPHY ...................................................................................................... 76 v LIST OF TABLES Table 1: Demographics, biochemical and dietary descriptives ............................ 13 Table 2: Metabolic syndrome characteristics ....................................................... 14 Table 3: Correlation coefficients (rs) between plasma AR concentration and various measures of WG intake. ........................................................................... 18 Table 4: Correlation coefficients (rs) between WG and AR by gender ................ 19 Table 5: Participant characteristics by plasma AR concentration quartile and WG intake quartile agreement with plasma AR concentration quartile ....................... 21 Table 6: Food determinants of plasma AR concentration .................................... 22 vi LIST OF FIGURES Figure 1: Average WG intake by source .............................................................. 15 Figure 2: Average Concentration of total AR and AR homologues ..................... 16 Figure 3: Log total WG intake vs log total plasma AR concentration ................. 17 Figure 4: Correlation coefficients (rs) between plasma AR concentrations and WG intake measures in males and females .................................................................. 20 vii MANUSCRIPT INTRODUCTION Although the inverse association between whole-grain (WG) intake and chronic disease risk is well-established (1-3), a number of challenges still exist in assessing WG intake. These include systematic and random measurement errors inherent in dietary reporting tools (4, 5), and consumer confusion in identifying WG products and evaluating serving sizes (6, 7). To deal with these challenges and improve the detection of relationships between WG intake and disease, alkylresorcinols (ARs) have been proposed as an objective biomarker of WG intake (8-10). Alkylresorcinols are phenolic lipids consumed almost exclusively from wheat and rye bran (11), and are absorbed and metabolized after consumption with a plasma half-life of ~5h (8, 12, 13). Intervention (14-18) and free-living (9, 19-22) studies have shown that plasma AR concentration is a valid, dose-responsive biomarker of WG intake and has moderate reproducibility up to 4 months. Correlation coefficients range from 0.24 – 0.56 for the relationship between plasma AR and total WG, WG wheat, WG rye and fiber intakes. The correlation between plasma AR and WG intake may be stronger in groups that consume more WG. This was shown with both acute consumption in a controlled feeding trial (14) and habitual consumption in observational and long-term intervention studies (16, 20). Many of the studies testing AR as a WG intake biomarker have been done in Nordic populations (9, 17, 19-21, 23, 24) which have relatively high habitual WG intake and consume more rye-based WG which has a higher AR content by weight than wheat (25, 26). 1 Few studies have tested plasma AR as a WG intake biomarker in American populations which consume relatively few WG, and those WG are primarily from wheat (27). To be a universally valid WG intake biomarker, plasma AR concentration should also reflect WG intake in populations that consume few WG from primarily non-rye sources. In this study, we examined the relationship
Load more

Recommended publications
  • Enhancement of Water Soluble Wheat Bran Polyphenolic Compounds Using Different Steviol Glucosides Prepared by Thermostable Β-Galactosidase
    Functional Foods in Health and Disease 2016; 6(10): 650-660 Page 650 of 660 Research Article Open Access Enhancement of water soluble wheat bran polyphenolic compounds using different steviol glucosides prepared by thermostable β-galactosidase Hee-jung Lim1, Thi Thanh Hanh Nguyen2, Nahyun M. Kim3, Gha-hyun J. Kim4, Kyeonghwan Hwang5, Jun-Seong Park5, Atsuo Kimura6 and Doman Kim1,2* 1Graduate School of International Agricultural Technology, Seoul National University, Pyeongchang-gun, Gangwon-do, 25354, Korea; 2Research Institute of Food Industrialization, Institutes of Green Bio Science and Technology, Seoul National University, Pyeongchang-gun, Gangwon-do, 25354, Korea; 3Section of Neurobiology, Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089, USA, 4School of Pharmacy, University of California, San Francisco, 500 Parnassus, San Francisco, CA 94143, USA, 5Skin Research Institute, Amorepacific Corporation R&D Center, Yongin, 17074, Korea, 6Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan *Corresponding author: Doman Kim, PhD, Graduate School of International Agricultural Technology, Seoul National University, Pyeongchang-gun, Gangwon-do, 25354, Korea **The first two authors contributed equally to this work. Submission Date: September 16, 2016, Accepted Date: October 25, 2016, Publication Date: October 30, 2016 Citation: Lim H.J., Nguyen T.T.H., Kim N.M., Kim G.J., Hwang K., Park J.S., Kimura A. and Kim D. Enhancement of water soluble wheat bran polyphenolic compounds using different steviol glucosides prepared by thermostable β-galactosidase. Functional Foods in Health and Disease 2016; 6(10):650-660 ABSTRACT: Background: Production of wheat bran (WB) for human consumption is estimated to be about 90 million tons per year.
    [Show full text]
  • Non-Destructive Determination of Alkylresorcinol (Ars) Content on Wheat Seed Surfaces and Prediction of Ars Content in Whole-Grain Flour
    molecules Article Non-Destructive Determination of Alkylresorcinol (ARs) Content on Wheat Seed Surfaces and Prediction of ARs Content in Whole-Grain Flour Jiahuan Wang, Xin Gao * and Zhonghua Wang * State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A & F University, Yangling 712100, China; [email protected] * Correspondence: [email protected] (X.G.); [email protected] (Z.W.); Tel.: +86-29-87081538 (Z.W.) Received: 15 March 2019; Accepted: 2 April 2019; Published: 4 April 2019 Abstract: Alkylresorcinols (ARs) are beneficial for human health and can be used as biomarkers for whole-grain cereal intake. In previous studies, ARs content in whole-grain flour was determined by milling the seeds into powder, thus destroying their structure. In this paper, we adopted a non-destructive extraction approach. Chloroform and ethyl acetate extraction methods were carried out to extract lipids from the seed surface and whole-grain flour of 36 wheat varieties in China, respectively. GC-MS analysis identified chemical compounds in which ARs were the major compounds for all the samples. The average total content of ARs (624.223 µg/g) in whole grains was much higher than that on seed surfaces (4.934 µg/g), with a positive correlation (r = 0.863, p < 0.001) between these two parameters. The results suggested that the total ARs content on the seed surface can be used to predict their content in whole-grain flour. Without affecting the seed germination rate and damaging seed structure, we demonstrate that a non-destructive extraction approach is an appropriate and useful method, facilitating the development of rapid screening methods suitable for use in wheat breeding.
    [Show full text]
  • Plasma Polyphenols Associated with Lower High-Sensitivity C-Reactive
    Downloaded from British Journal of Nutrition (2020), 123, 198–208 doi:10.1017/S0007114519002538 © The Authors 2019. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http:// creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original https://www.cambridge.org/core work is properly cited. Plasma polyphenols associated with lower high-sensitivity C-reactive protein concentrations: a cross-sectional study within the European Prospective Investigation into Cancer and Nutrition (EPIC) cohort . IP address: Laura M. Harms1, Augustin Scalbert2, Raul Zamora-Ros3, Sabina Rinaldi2, Mazda Jenab2, Neil Murphy2, 2 4,5 4 6,7 8,9 David Achaintre , Anne Tjønneland , Anja Olsen , Kim Overvad , Francesca Romana Mancini , 170.106.40.40 Yahya Mahamat-Saleh8,9, Marie-Christine Boutron-Ruault8,9, Tilman Kühn10, Verena Katzke10, Antonia Trichopoulou11,12, Georgia Martimianaki11, Anna Karakatsani11,13, Domenico Palli14, , , , Salvatore Panico15, Sabina Sieri16, Rosario Tumino17, Carlotta Sacerdote18, Bas Bueno-de-Mesquita19 20 21 22, , on Roel C. H. Vermeulen19,23,24, Elisabete Weiderpass2, Therese Haugdahl Nøst25, Cristina Lasheras26, 23 Sep 2021 at 13:17:59 Miguel Rodríguez-Barranco27,28, José María Huerta28,29, Aurelio Barricarte28,30,31, Miren Dorronsoro32, Johan Hultdin33, Julie A. Schmidt34, Marc Gunter2, Elio Riboli19 and Krasimira Aleksandrova1,35* 1Nutrition, Immunity and Metabolism Senior Scientist Group, Department
    [Show full text]
  • Evaluation of Cytotoxicity of 5‑N‑Alkylresorcinol Homologs and Fraction on Mouse Fibroblast Cell Line L929
    Eur Food Res Technol DOI 10.1007/s00217-016-2827-5 ORIGINAL PAPER Evaluation of cytotoxicity of 5‑n‑alkylresorcinol homologs and fraction on mouse fibroblast cell line L929 Izabela Biskup1 · Ewa Zaczynska2 · Miroslawa Krauze‑Baranowska3 · Izabela Fecka1 Received: 27 July 2016 / Revised: 28 October 2016 / Accepted: 26 November 2016 © The Author(s) 2016. This article is published with open access at Springerlink.com Abstract Cytotoxic effect of natural 5-n-alkylresorcinol Keywords Alkylresorcinols · Resorcinol · Spelt · fraction, individual homologs and some related compounds Cytotoxicity (resorcinol, orcinol and olivetol) was tested in vitro against mouse fibroblast cell line L929 in terms of their safety for use according to PN-EN ISO 10993-5:2009 method. Introduction Alkylresorcinol-rich fraction and five known individual alkylresorcinol homologs (C17:0, C19:0 C21:0, C23:0 Wheat (Triticum aestivum L.) from family Poaceae is the and C25:0) were obtained from spelt (Triticum spelta L.) elementary cereal in the human diet in many countries. bran. The structures of these compounds were elucidated However, products from other cereal species from this fam- and confirmed by using two spectroscopic techniques: MS ily, e.g., spelt (Triticum spelta L.) or rye (Secale cereale L.), and NMR. Hydroquinone, positional isomer of resorcinol, are becoming more and more popular. Whole-grain food is was used as cytotoxic positive control. Cytotoxicity was rich in fiber, vitamins, minerals, phytosterols and phenolics. expressed as IC50 and was estimated in the range of 171– Phenolic compounds are the most prevalent group of phy- 2142 µM for individual homologs depending on alkyl chain tochemicals in plants.
    [Show full text]
  • Biomarkers of Whole Grain Intake
    Proceedings Whole Grains Summit 2012 Biomarkers of Whole Grain Intake ALASTAIR B. ROSS1 is specific to each cereal type and also differs between common ABSTRACT SUMMARY and durum wheat. This is indicated using the ratio of homo- Biomarkers of dietary intake have been long proposed as alterna- logues C17:0 and C21:0, with 0.01 for durum wheat, 0.1 for tives or complementary to questionnaire based forms of dietary as- common wheat, and 1 for rye (the rye x wheat hybrid triticale sessment. In the case of a food category as diverse as whole grains the has a ratio of 0.3–0.4) (2). This ratio is reflected to some extent application of biomarkers may increase the robustness of estimations when measuring plasma alkylresorcinols (7). of whole grain intake. The amount of alkylresorcinols in white wheat flour is gen- Currently, alkylresorcinols—phenolic lipids present in the outer lay- ers of wheat, rye, and barley—are promising biomarkers of whole erally between 10–40 μg/g, with increasing amounts depending grain cereal intake, meeting most of the suggested criteria for an in- on the extraction rate. Whole grain common wheat flour gen- take biomarker. Initial studies demonstrate that plasma alkylresor- erally ranges from 300–700 μg/g, while whole grain rye gener- cinols and their metabolites are highly responsive to alkylresorcinol ally ranges from 500–1000 μg/g and whole grain barley be- intake and that they reflect whole grain intake. Further studies are tween 40–120 μg/g (13, 14). required to test their application in observational cohorts and as bi- The estimated mean intake of alkylresorcinols is around 12 omarkers of compliance in intervention studies.
    [Show full text]
  • Alkylresorcinols in Extruded Cereal Brans
    Alkylresorcinols in Extruded Cereal Brans I. AL-RUQAIE and K. LORENZ' ABSTRACT Cereal Chem. 69(5):472-475 Rye, wheat, and triticale grains and their milling fractions were analyzed screw speed) used. The highest reduction was observed in rye bran and for alkylresorcinol content. Rye grain was the highest, triticale inter- the lowest in wheat bran, possibly due to differences in alkylresorcinol mediate, and wheat grain the lowest in alkylresorcinol content. The bran homolog composition. The alkylresorcinol content of extruded bran of these cereals contained the highest amounts of alkylresorcinols, shorts samples was still several times higher, however, than that found in flour intermediate amounts, and flour the lowest amounts. Extrusion reduced samples of wheat, rye, and triticale. Human toxicity levels of these alkylresorcinol content in bran by 53.7-76.9%, depending on the type compounds have not yet been established. of cereal and extrusion conditions (moisture, barrel temperature, and A group of compounds known to inhibit growth in several MATERIALS AND METHODS animal species has been isolated from cereal grains (Wieringa 1967, Evans et al 1973, Pawlik 1979, Sedlet et al 1984) and Grain Samples identified as resorcinol derivatives with hydrocarbon chains at The study included a composite of the rye varieties Maton the fifth position. There is no established human toxicity level and Bonel, grown on field plots at the Irrigated Desert Research for these compounds. Cereal alkylresorcinols were found to be Station, Brawley, CA, the wheat variety Vona, and a composite mixtures of saturated, monoenoic, and dienoic homologs with of the winter triticales TR385 and TR386, grown at the Colorado 13-29 carbon side chains (Wieringa 1967; Kozubek 1984, 1987; State University Agronomy Research Farm, Fort Collins.
    [Show full text]
  • Present Status and Perspectives on the Use of Alkylresorcinols As Biomarkers of Wholegrain Wheat and Rye Intake
    Hindawi Publishing Corporation Journal of Nutrition and Metabolism Volume 2012, Article ID 462967, 12 pages doi:10.1155/2012/462967 Review Article Present Status and Perspectives on the Use of Alkylresorcinols as Biomarkers of Wholegrain Wheat and Rye Intake Alastair B. Ross Department of Bioanalytical Sciences, Nestl´e Research Center, Vers Chez Les Blanc, 1000 Lausanne 26, Switzerland Correspondence should be addressed to Alastair B. Ross, [email protected] Received 8 July 2011; Accepted 27 September 2011 Academic Editor: Bernard Venn Copyright © 2012 Alastair B. Ross. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Alkylresorcinols (ARs) were first proposed as potential biomarkers of wholegrain wheat and rye intake a decade ago. Since then there has been a considerable body of research which suggests that ARs do meet most criteria of a biomarker of these foods. Results from human studies on plasma AR and their plasma and urinary metabolites strongly indicate that these compounds are responsive to whole grain wheat and rye intake and are correlated with various measures of AR consumption. This review briefly summarises work on the bioactivities of AR and focuses on aspects related to their use as biomarkers of whole grain wheat and rye intake. Evidence suggests that they thus far broadly fulfil the criteria to act as biomarkers of these cereals. However, there are still gaps in the knowledge on factors relating to the wide interindividual variation, and application to different epidemiological cohorts.
    [Show full text]
  • Plasma Alkylresorcinol Metabolites As Potential Biomarkers of Whole-Grain
    Downloaded from British Journal of Nutrition (2010), 103, 339–343 doi:10.1017/S0007114509992315 q The Authors 2009 https://www.cambridge.org/core Short Communication Plasma alkylresorcinol metabolites as potential biomarkers of whole-grain wheat and rye cereal fibre intakes in women . IP address: Myle`ne Aubertin-Leheudre*, Anja Koskela, Adile Samaletdin and Herman Adlercreutz 170.106.40.219 Institute for Preventive Medicine, Nutrition and Cancer, Folkha¨lsan Research Center, and Division of Clinical Chemistry, Biomedicum Helsinki, University of Helsinki, Haartmaninkatu 8, PO Box 63, BP 63, Room C315a, FIN-00014 Helsinki, Finland , on (Received 18 February 2009 – Revised 29 July 2009 – Accepted 3 August 2009 – First published online 29 October 2009) 26 Sep 2021 at 00:31:03 It has been demonstrated that intact plasma alkylresorcinols (AR) and urinary AR metabolites could be used as biomarkers of whole-grain intake. Thereafter, we developed the method for the plasma AR metabolites, which is more convenient and requires less sample pretreatment than the analysis of intact plasma AR. The aim of the present study is to evaluate whether AR metabolites measured in plasma, in the same population, could also be considered as useful biomarkers of cereal fibre. Fifty-six women were recruited in a cross-sectional and observational study. Dietary , subject to the Cambridge Core terms of use, available at intake (5-d record) and plasma AR metabolites (3,5-dihydroxybenzoic acid, DHBA; 3-(3,5-dihydroxyphenyl)-1-propanoic acid, DHPPA) were measured. The relationship between plasma AR metabolites and cereal fibre intake was examined using partial correlation and stepwise regression.
    [Show full text]
  • Wheat Bran Phenolic Acids: Bioavailability and Stability in Whole Wheat-Based Foods
    Molecules 2015, 20, 15666-15685; doi:10.3390/molecules200915666 OPEN ACCESS molecules ISSN 1420-3049 www.mdpi.com/journal/molecules Review Wheat Bran Phenolic Acids: Bioavailability and Stability in Whole Wheat-Based Foods Barbara Laddomada *, Sofia Caretto and Giovanni Mita Istituto di Scienze delle Produzioni Alimentari, CNR, Via Prov.le Monteroni, 73100 Lecce, Italy; E-Mails: [email protected] (S.C.); [email protected] (G.M.) * Author to whom correspondence should be addressed; E-Mail: [email protected]; Tel.: +39-0832-422-613; Fax: +39-0832-422-620. Academic Editor: Marcello Iriti Received: 29 July 2015 / Accepted: 21 August 2015 / Published: 28 August 2015 Abstract: Wheat bran is generally considered a byproduct of the flour milling industry, but it is a great source of fibers, minerals, and antioxidants that are important for human health. Phenolic acids are a specific class of wheat bran components that may act as antioxidants to prevent heart disease and to lower the incidence of colon cancer. Moreover, phenolic acids have anti-inflammatory properties that are potentially significant for the promotion of gastrointestinal health. Evidence on the beneficial effects of phenolic acids as well as of other wheat bran components is encouraging the use of wheat bran as an ingredient of functional foods. After an overview of the chemistry, function, and bioavailability of wheat phenolic acids, the discussion will focus on how technologies can allow the formulation of new, functional whole wheat products with enhanced health-promoting value and safety without renouncing the good-tasting standards that are required by consumers.
    [Show full text]
  • Carotenoids and Alkylresorcinols As Objective Biomarkers of Diet Quality
    Nybacka et al. BMC Nutrition (2016) 2:53 DOI 10.1186/s40795-016-0094-2 RESEARCH ARTICLE Open Access Carotenoids and alkylresorcinols as objective biomarkers of diet quality when assessing the validity of a web-based food record tool and a food frequency questionnaire in a middle-aged population Sanna Nybacka1* , Anna Karin Lindroos2, Elisabet Wirfält3, Per Leanderson4, Rikard Landberg5,6, Ulrika Ericson7, Ingrid Larsson8, Eva Warensjö Lemming2, Göran Bergström9, Bo Hedblad7, Marju Orho-Melander7, Olle Melander7, Anna Winkvist1 and Heléne Bertéus Forslund1 Abstract Background: Recently, two web-based dietary assessment tools were developed; a 4-day food record tool (the Riksmaten method), and a food frequency questionnaire (MiniMeal-Q). The aim of this study was to use objective biomarkers to examine the ability of the two methods to capture habitual dietary intake. Methods: In total, 200 individuals from the pilot study of the Swedish CArdioPulmonary bioImage Study (SCAPIS) participated. Plasma concentration of carotenoids were determined with high-performance liquid chromatography (HPLC) and used as biomarkers of fruit and vegetable intake. A gas chromatography mass spectrometry (GC-MS) method was used to quantify alkylresorcinol homologues, which were used as biomarkers of whole grain wheat and rye intake. Results: The correlations between energy-adjusted fruit and vegetable intakes and plasma carotenoid concentrations (except lycopene) were stronger amongst women than men (r =0.46andr = 0.20 for the Riksmaten method, and r =0. 50 and r = 0.31 for MiniMeal-Q, respectively). For whole grains, the correlations of energy-adjusted intakes and alkylresorcinols were higher using the Riksmaten method (r =0.30andr=0.29 for women and men) than the MiniMeal-Q (r =0.25andr=0.20, respectively).
    [Show full text]
  • Plasma Alkylresorcinol Metabolite, a Biomarker of Whole-Grain Wheat
    Diabetes Care 1 Taoping Sun,1,2 Ying Rong,3 Xiaoli Hu,1,2 Plasma Alkylresorcinol Yalun Zhu,1,2 Hao Huang,1,2 Liangkai Chen,1,2 Peiyun Li,1,2 Metabolite, a Biomarker of Whole- Shuzhen Li,1,2 Wei Yang,1,2 Jinquan Cheng,4 Xuefeng Yang,1,2 Grain Wheat and Rye Intake, and Ping Yao,1,2 Frank B. Hu,5 and Risk of Type 2 Diabetes and Liegang Liu1,2 Impaired Glucose Regulation in aChinesePopulation EPIDEMIOLOGY/HEALTH SERVICES RESEARCH https://doi.org/10.2337/dc17-1570 OBJECTIVE To examine the association of plasma alkylresorcinol metabolite 3-(3,5-dihydroxyphenyl)- 1-propanoic acid (DHPPA), a biomarker of whole-grain wheat and rye intake, with type 2 diabetes (T2D) and impaired glucose regulation (IGR) in a Chinese pop- 1Department of Nutrition and Food Hygiene, ulation. Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, RESEARCH DESIGN AND METHODS Huazhong University of Science and Technology, A total of 1,060 newly diagnosed T2D patients, 736 newly diagnosed IGR patients, Wuhan, China 2Ministry of Education Key Laboratory of Envi- and 1,443 control subjects with normal glucose tolerance were recruited in the case- ronment and Health, School of Public Health, control study. Plasma DHPPA concentrations were determined by high-performance Tongji Medical College, Huazhong University of liquid chromatography–tandem mass spectroscopy. Multivariate logistic regression Science and Technology, Wuhan, China 3 analysis was used to evaluate the independent association of plasma DHPPA con- Department of Nutrition, Shandong Provincial Hospital, Shandong University, Jinan, China centrations with the likelihood of T2D and IGR.
    [Show full text]
  • Alkylresorcinols As Biomarkers of Whole Grain Wheat and Rye Intake
    Alkylresorcinols as Biomarkers of Whole Grain Wheat and Rye Intake Rikard Landberg Faculty of Natural Resources and Agricultural Sciences Department of Food Science Uppsala Doctoral Thesis Swedish University of Agricultural Sciences Uppsala 2009 Acta Universitatis Agriculturae Sueciae 2009:11 Cover: The concept of a biomarker of whole grain wheat and rye intake (photo: R. Andersson, R. Landberg) ISSN 1652-6880 ISBN 978-91-86195-58-8 © 2009 Rikard Landberg, Uppsala Tryck: SLU Service/Repro, Uppsala 2009 Alkylresorcinols as Biomarkers of Whole Grain Wheat and Rye Intake Abstract Dietary biomarkers are objective measures of food or nutrient intake and can be related to endpoints in epidemiological studies, used in the validation of dietary assessment instruments and used to check of compliance during intervention studies. Alkylresorcinols (AR), phenolic lipids present exclusively in the outer parts of wheat and rye grains, have been suggested as biomarkers of whole grain wheat and rye intake. The overall aim with this thesis was to evaluate AR as specific biomarkers of whole grain wheat and rye intake. This was conducted by developing a rapid GC- MS method for the analysis of AR in plasma and by studying AR pharmacokinetics, dose-response, reproducibility and relative validity in human intervention studies under controlled intake conditions. Factors affecting plasma AR concentrations were investigated in free-living Danish women. The method developed proved suitable for the analysis of relatively small sample volumes (50- 200μL). The results showed that AR in fasting plasma samples can be used as short-term concentration biomarkers, reflecting the intake range normally found in the Nordic countries in a dose-dependent manner.
    [Show full text]