1
|
Guillán-Fresco M, Franco-Trepat E, Alonso-Pérez A, Jorge-Mora A, López-López V, Pazos-Pérez A, Piñeiro-Ramil M, Gómez R. Formononetin, a Beer Polyphenol with Catabolic Effects on Chondrocytes. Nutrients 2023; 15:2959. [PMID: 37447284 DOI: 10.3390/nu15132959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 07/15/2023] Open
Abstract
Beer consumption has been identified as a risk factor for osteoarthritis (OA), a rheumatic disease characterised by cartilage degradation, joint inflammation, and eventual joint failure. One of the main isoflavonoids in beer is formononetin (FNT), an estrogenic compound also found in multiple plants and herbs. In this study, we aimed to investigate the effect of FNT on chondrocyte viability, inflammation, and metabolism. Cells were treated with FNT with or without IL-1β for 48 h and during 7 days of differentiation. Cell viability was determined via MTT assay. Nitrite accumulation was determined by Griess reaction. The expression of genes involved in inflammation and metabolism was determined by RT-PCR. The results revealed that a low concentration of FNT had no deleterious effect on cell viability and decreased the expression of inflammation-related genes. However, our results suggest that FNT overexposure negatively impacts on chondrocytes by promoting catabolic responses. Finally, these effects were not mediated by estrogen receptors (ERs) or aryl hydrocarbon receptor (AhR). In conclusion, factors that favour FNT accumulation, such as long exposure times or metabolic disorders, can promote chondrocyte catabolism. These data may partially explain why beer consumption increases the risk of OA.
Collapse
Affiliation(s)
- María Guillán-Fresco
- Musculoskeletal Pathology Group, Health Research Institute of Santiago de Compostela (IDIS), Santiago University Clinical Hospital SERGAS, 15706 Santiago de Compostela, Spain
| | - Eloi Franco-Trepat
- Musculoskeletal Pathology Group, Health Research Institute of Santiago de Compostela (IDIS), Santiago University Clinical Hospital SERGAS, 15706 Santiago de Compostela, Spain
| | - Ana Alonso-Pérez
- Musculoskeletal Pathology Group, Health Research Institute of Santiago de Compostela (IDIS), Santiago University Clinical Hospital SERGAS, 15706 Santiago de Compostela, Spain
| | - Alberto Jorge-Mora
- Musculoskeletal Pathology Group, Health Research Institute of Santiago de Compostela (IDIS), Santiago University Clinical Hospital SERGAS, 15706 Santiago de Compostela, Spain
| | - Verónica López-López
- Musculoskeletal Pathology Group, Health Research Institute of Santiago de Compostela (IDIS), Santiago University Clinical Hospital SERGAS, 15706 Santiago de Compostela, Spain
| | - Andrés Pazos-Pérez
- Musculoskeletal Pathology Group, Health Research Institute of Santiago de Compostela (IDIS), Santiago University Clinical Hospital SERGAS, 15706 Santiago de Compostela, Spain
| | - María Piñeiro-Ramil
- Musculoskeletal Pathology Group, Health Research Institute of Santiago de Compostela (IDIS), Santiago University Clinical Hospital SERGAS, 15706 Santiago de Compostela, Spain
| | - Rodolfo Gómez
- Musculoskeletal Pathology Group, Health Research Institute of Santiago de Compostela (IDIS), Santiago University Clinical Hospital SERGAS, 15706 Santiago de Compostela, Spain
| |
Collapse
|
2
|
Ha K, Liao LM, Sinha R, Chun OK. Dietary Total Antioxidant Capacity, a Diet Quality Index Predicting Mortality Risk in US Adults: Evidence from the NIH-AARP Diet and Health Study. Antioxidants (Basel) 2023; 12:antiox12051086. [PMID: 37237952 DOI: 10.3390/antiox12051086] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/09/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023] Open
Abstract
Dietary total antioxidant capacity (TAC) is an index representing the total antioxidant power of antioxidants consumed via the diet. This study aimed to investigate the association between dietary TAC and mortality risk in the US adults using data from the NIH-AARP Diet and Health Study. A total of 468,733 adults aged 50-71 years were included. Dietary intake was assessed using a food frequency questionnaire. Dietary TAC from diet was calculated from antioxidants including vitamin C, vitamin E, carotenoids, and flavonoids, and TAC from dietary supplements was calculated from supplemental vitamin C, vitamin E, and beta-carotene. During a median follow-up of 23.1 years, 241,472 deaths were recorded. Dietary TAC was inversely associated with all-cause (hazard ratio (HR) for quintile 5 vs. quintile 1: 0.97, 95% confidence interval (CI): 0.96-0.99, p for trend < 0.0001) and cancer mortality (HR for quintile 5 vs. quintile 1: 0.93, 95% CI: 0.90-0.95, p for trend < 0.0001). However, dietary supplement TAC was inversely associated with cancer mortality risk only. These findings indicate that consuming a habitual diet high in antioxidants may reduce the risk of all-cause and cancer mortality and TAC from foods might confer greater health benefits than TAC from dietary supplements.
Collapse
Affiliation(s)
- Kyungho Ha
- Department of Food Science and Nutrition, Jeju National University, Jeju 63243, Republic of Korea
| | - Linda M Liao
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD 20850, USA
| | - Rashmi Sinha
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD 20850, USA
| | - Ock K Chun
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA
| |
Collapse
|
3
|
Soybean product consumption decreases risk of gastric cancer: results from the Health Examinees Study. Eur J Nutr 2023; 62:1743-1753. [PMID: 36820884 DOI: 10.1007/s00394-023-03115-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 02/10/2023] [Indexed: 02/24/2023]
Abstract
BACKGROUND Epidemiological findings on the association between soybean product consumption and gastric cancer risk remain inconsistent. We evaluated the relationship between soybean product consumption and the risk of gastric cancer in a prospective cohort study in Korea. METHODS This prospective cohort study included a total of 139,267 participants aged 40-69 years from the Health Examinees-Gem (HEXA-G) study between 2004 and 2013. Information on cancer diagnosis was retrieved from the Korea Central Cancer Registry until 31 December 2018. Multivariate hazard ratios (HRs) and 95% of confidence intervals (CIs) for the risk of gastric cancer according to the consumption of soybean products were estimated using Cox proportional hazards models. RESULTS A total of 767 incident cases of gastric cancer occurred over an average follow-up period of 9.21 years. We found that men who consumed two servings per week had 37% lower risk of gastric cancer compared with who consume those who almost never consumed (HR for tofu consumption of more than two servings/week vs. almost never consumed was 0.63 (95% CI 0.45, 0.89); p for trend = 0.04). Among men with a BMI of less than 25 kg/m2, increased consumption of soybean paste (p for trend = 0.02) and tofu (HR 0.51 (95% CI 0.32, 0.82 for more than two servings/week vs. almost never consumed); p for trend = 0.01) was associated with decreased risk of gastric cancer. CONCLUSION Our results suggest that a high consumption of soybean products has a protective effect against gastric cancer.
Collapse
|
4
|
Ohishi T, Miyoshi N, Mori M, Sagara M, Yamori Y. Health Effects of Soy Isoflavones and Green Tea Catechins on Cancer and Cardiovascular Diseases Based on Urinary Biomarker Levels. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27248899. [PMID: 36558031 PMCID: PMC9781513 DOI: 10.3390/molecules27248899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 12/07/2022] [Accepted: 12/09/2022] [Indexed: 12/23/2022]
Abstract
Plant polyphenols have various health effects. Genistein, which is abundant in soybeans, and epigallocatechin-3-gallate, which is abundant in green tea, are major flavonoids, a subclass group of polyphenols. Several epidemiological studies have shown that these flavonoids have beneficial effects against cancer and cardiovascular diseases. However, other studies did not show such effects. Several confounding factors, including recall bias, are related to these inconsistent findings, and the determination of metabolites in the urine may be useful in reducing the number of confounding factors. Equipment, which can be used by research participants to collect samples from a portion of voided urine within 24 h without the help of medical workers, has been developed for epidemiological investigations. Previous studies, in which flavonoid metabolites in these urine samples were measured, revealed that soy intake was correlated with a reduced risk of certain types of cancer and cardiovascular diseases worldwide. Although soybeans and green tea consumption may have protective effects against cancer and cardiovascular diseases, further clinical studies that consider different confounding factors are required to provide evidence for the actual impact of dietary flavonoids on human diseases, including cancer and cardiovascular diseases. One possible mechanism involved is discussed in relation to the downregulation of reactive oxygen species and the upregulation of 5'-adenosine monophosphate-activated protein kinase elicited by these flavonoids.
Collapse
Affiliation(s)
- Tomokazu Ohishi
- Institute of Microbial Chemistry (BIKAKEN), Numazu, Microbial Chemistry Research Foundation, Shizuoka 410-0301, Japan
- Laboratory of Oncology, Institute of Microbial Chemistry (BIKAKEN), Microbial Chemistry Research Foundation, Tokyo 141-0021, Japan
- Correspondence: (T.O.); (Y.Y.)
| | - Noriyuki Miyoshi
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
| | - Mari Mori
- Department of Health Management, School of Health Studies, Tokai University, Kanagawa 259-1292, Japan
- NPO World Health Frontier Institute, Nishinomiya 663-8143, Japan
- Institute for World Health Development, Mukogawa Women’s University, Nishinomiya 663-8143, Japan
| | - Miki Sagara
- Institute for World Health Development, Mukogawa Women’s University, Nishinomiya 663-8143, Japan
- Disease Model Cooperative Research Association, Kyoto 606-0805, Japan
| | - Yukio Yamori
- Institute for World Health Development, Mukogawa Women’s University, Nishinomiya 663-8143, Japan
- Correspondence: (T.O.); (Y.Y.)
| |
Collapse
|
5
|
Kim Y, Kim DW, Kim K, Choe JS, Lee HJ. Usual intake of dietary isoflavone and its major food sources in Koreans: Korea National Health and Nutrition Examination Survey 2016-2018 data. Nutr Res Pract 2022; 16:S134-S146. [PMID: 35651842 PMCID: PMC9127517 DOI: 10.4162/nrp.2022.16.s1.s134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/25/2022] [Accepted: 04/28/2022] [Indexed: 11/04/2022] Open
Affiliation(s)
- Yoona Kim
- Department of Food and Nutrition, Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Korea
| | - Dong Woo Kim
- Food and Nutrition Major, Division of Human Ecology, Korea National Open University, Seoul 03087, Korea
| | - Kijoon Kim
- Department of Food and Nutrition, Sookmyung Women’s University, Seoul 04310, Korea
| | - Jeong-Sook Choe
- Department of Agro-materials Evaluation, National Institute of Agricultural Sciences, Wanju 55365, Korea
| | - Hae-Jeung Lee
- Department of Food and Nutrition, College of Bio-Nano Technology, Gachon University, Seongnam 13120, Korea
- Institute for Aging and Clinical Nutrition Research, Gachon University, Seongnam 13120, Korea
| |
Collapse
|
6
|
Xu Y, Le Sayec M, Roberts C, Hein S, Rodriguez-Mateos A, Gibson R. Dietary Assessment Methods to Estimate (Poly)phenol Intake in Epidemiological Studies: A Systematic Review. Adv Nutr 2021; 12:1781-1801. [PMID: 33684195 PMCID: PMC8483972 DOI: 10.1093/advances/nmab017] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 01/06/2021] [Accepted: 01/29/2021] [Indexed: 11/25/2022] Open
Abstract
Nutritional epidemiological studies have frequently reported associations between higher (poly)phenol intake and a decrease in the risk or incidence of noncommunicable diseases. However, the assessment methods that have been used to quantify the intakes of these compounds in large-population samples are highly variable. This systematic review aims to characterize the methods used to assess dietary (poly)phenol intake in observational studies, report the validation status of the methods, and give recommendations on method selection and data reporting. Three databases were searched for publications that have used dietary assessment methods to measure (poly)phenol intake and 549 eligible full texts were identified. Food-frequency questionnaires were found to be the most commonly used tool to assess dietary (poly)phenol intake (73%). Published data from peer-reviewed journals were the major source of (poly)phenol content data (25%). An increasing number of studies used open-access databases such as Phenol-Explorer and USDA databases on flavonoid content since their inception, which accounted for 11% and 23% of the data sources, respectively. Only 16% of the studies reported a method that had been validated for measuring the target (poly)phenols. For future research we recommend: 1) selecting a validated dietary assessment tool according to the target compounds and target period of measurement; 2) applying and combining comprehensive (poly)phenol content databases such as USDA and Phenol-Explorer; 3) detailing the methods used to assess (poly)phenol intake, including dietary assessment method, (poly)phenol content data source; 4) follow the Strengthening the Reporting of Observational Studies in Epidemiology-Nutritional Epidemiology (STROBE-nut) framework; and 5) complementing dietary intake assessment based on questionnaires with measurement of (poly)phenols in biofluids using appropriate and validated analytical methods.
Collapse
Affiliation(s)
- Yifan Xu
- Department of Nutritional Sciences, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
| | - Melanie Le Sayec
- Department of Nutritional Sciences, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
| | - Caroline Roberts
- Department of Nutritional Sciences, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom
| | - Sabine Hein
- Department of Nutritional Sciences, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom,School of Psychology and Clinical Language Sciences, University of Reading, Reading, United Kingdom
| | | | | |
Collapse
|
7
|
Green MP, Harvey AJ, Finger BJ, Tarulli GA. Endocrine disrupting chemicals: Impacts on human fertility and fecundity during the peri-conception period. ENVIRONMENTAL RESEARCH 2021; 194:110694. [PMID: 33385395 DOI: 10.1016/j.envres.2020.110694] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/24/2020] [Accepted: 12/25/2020] [Indexed: 05/08/2023]
Abstract
It is becoming increasingly difficult to avoid exposure to man-made endocrine disrupting chemicals (EDCs) and environmental toxicants. This escalating yet constant exposure is postulated to partially explain the concurrent decline in human fertility that has occurred over the last 50 years. Controversy however remains as to whether associations exist, with conflicting findings commonly reported for all major EDC classes. The primary aim of this extensive work was to identify and review strong peer-reviewed evidence regarding the effects of environmentally-relevant EDC concentrations on adult male and female fertility during the critical periconception period on reproductive hormone concentrations, gamete and embryo characteristics, as well as the time to pregnancy in the general population. Secondly, to ascertain whether individuals or couples diagnosed as sub-fertile exhibit higher EDC or toxicant concentrations. Lastly, to highlight where little or no data exists that prevents strong associations being identified. From the greater than 1480 known EDCs, substantial evidence supports a negative association between exposure to phthalates, PCBs, PBDEs, pyrethroids, organochloride pesticides and male fertility and fecundity. Only moderate evidence exists for a negative association between BPA, PCBs, organochloride pesticides and female fertility and fecundity. Overall fewer studies were reported in women than men, with knowledge gaps generally evident for both sexes for all the major EDC classes, as well as a paucity of female fertility studies following exposure to parabens, triclosans, dioxins, PFAS, organophosphates and pyrethroids. Generally, sub-fertile individuals or couples exhibit higher EDC concentrations, endorsing a positive association between EDC exposure and sub-fertility. This review also discusses confounding and limiting factors that hamper our understanding of EDC exposures on fertility and fecundity. Finally, it highlights future research areas, as well as government, industry and social awareness strategies required to mitigate the negative effects of EDC and environmental toxicant exposure on human fertility and fecundity.
Collapse
Affiliation(s)
- Mark P Green
- School of BioSciences, University of Melbourne, Melbourne, VIC, Australia.
| | - Alexandra J Harvey
- School of BioSciences, University of Melbourne, Melbourne, VIC, Australia
| | - Bethany J Finger
- School of BioSciences, University of Melbourne, Melbourne, VIC, Australia
| | - Gerard A Tarulli
- School of BioSciences, University of Melbourne, Melbourne, VIC, Australia
| |
Collapse
|
8
|
Shishtar E, Rogers GT, Blumberg JB, Au R, Jacques PF. Long-term dietary flavonoid intake and risk of Alzheimer disease and related dementias in the Framingham Offspring Cohort. Am J Clin Nutr 2020; 112:343-353. [PMID: 32320019 PMCID: PMC7398772 DOI: 10.1093/ajcn/nqaa079] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 03/27/2020] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Findings from existing prospective observational studies on the protective associations of flavonoid intake and the risk of Alzheimer disease and related dementias (ADRD) are inconsistent largely due to limitations of these studies. OBJECTIVES To examine the prospective relation between total and 6 classes of dietary flavonoid intake and risk of ADRD and Alzheimer disease (AD) while addressing limitations of earlier observational studies. METHODS We used data from the Framingham Heart Study Offspring Cohort exams 5 through 9. Participants were ADRD-free with a valid FFQ at baseline. Flavonoid intakes were updated at each exam to represent the cumulative average intake across the 5 exams, and were expressed as percentile categories of intake (≤15th, >15th to 30th, >30th to 60th, >60th) to handle their nonlinear relation with ADRD and AD. Cox proportional hazards regression was used to estimate the HRs for the association between the flavonoid intakes and incidence of ADRD and AD. RESULTS Over an average follow-up of 19.7 y in 2801 participants (mean baseline age = 59.1 y; 52% females), there were 193 ADRD events of which 158 were AD. After multivariate and dietary adjustments, individuals with the highest (>60th percentile) intakes of flavonols, anthocyanins, and flavonoid polymers had a lower risk of ADRD relative to individuals with the lowest intakes (≤15th percentile), with HRs (95% CI; P-trend) of 0.54 (0.32, 0.90; P = 0.003) for flavonols, 0.24 (0.15, 0.39; P < 0.001) for anthocyanins, and 0.58 (0.35, 0.94; P = 0.03) for flavonoid polymers. The same pattern of associations was seen with AD for flavonols and anthocyanins but not for flavonoid polymers. CONCLUSIONS Our findings imply that higher long-term dietary intakes of flavonoids are associated with lower risks of ADRD and AD in US adults.
Collapse
Affiliation(s)
- Esra Shishtar
- Nutritional Epidemiology Program, Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, USA
- The Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| | - Gail T Rogers
- Nutritional Epidemiology Program, Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, USA
| | - Jeffrey B Blumberg
- The Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| | - Rhoda Au
- The Framingham Heart Study, Boston University School of Medicine, Boston, MA, USA
- Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, MA, USA
- Department of Neurology, Boston University School of Medicine, Boston, MA, USA
- Department of Epidemiology, Boston University School of Public Health, Boston, MA, USA
- Boston University Alzheimer's Disease Center, Boston, MA, USA
| | - Paul F Jacques
- Nutritional Epidemiology Program, Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, USA
- The Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| |
Collapse
|
9
|
Clarke ED, Rollo ME, Pezdirc K, Collins CE, Haslam RL. Urinary biomarkers of dietary intake: a review. Nutr Rev 2020; 78:364-381. [PMID: 31670796 DOI: 10.1093/nutrit/nuz048] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Dietary intakes are commonly assessed by established methods including food frequency questionnaires, food records, or recalls. These self-report methods have limitations impacting validity and reliability. Dietary biomarkers provide objective verification of self-reported food intakes, and represent a rapidly evolving area. This review aims to summarize the urinary biomarkers of individual foods, food groups, dietary patterns, or nutritional supplements that have been evaluated to date. Six electronic databases were searched. Included studies involved healthy populations, were published from 2000, and compared measured dietary intake with urinary markers. The initial search identified 9985 studies; of these, 616 full texts were retrieved and 109 full texts were included. Of the included studies, 67 foods and food components were studied, and 347 unique urinary biomarkers were identified. The most reliable biomarkers identified were whole grains (alkylresorcinols), soy (isoflavones), and sugar (sucrose and fructose). While numerous novel urinary biomarkers have been identified, further validation studies are warranted to verify the accuracy of self-reported intakes and utility within practice.
Collapse
Affiliation(s)
- Erin D Clarke
- School of Health Sciences, Faculty of Health and Medicine, University of Newcastle, Callaghan, NSW, Australia.,Priority Research Centre in Physical Activity and Nutrition, University of Newcastle, Callaghan, NSW, Australia
| | - Megan E Rollo
- School of Health Sciences, Faculty of Health and Medicine, University of Newcastle, Callaghan, NSW, Australia.,Priority Research Centre in Physical Activity and Nutrition, University of Newcastle, Callaghan, NSW, Australia
| | - Kristine Pezdirc
- School of Medicine and Public Health, University of Newcastle, Callaghan, NSW, Australia
| | - Clare E Collins
- School of Health Sciences, Faculty of Health and Medicine, University of Newcastle, Callaghan, NSW, Australia.,Priority Research Centre in Physical Activity and Nutrition, University of Newcastle, Callaghan, NSW, Australia
| | - Rebecca L Haslam
- School of Health Sciences, Faculty of Health and Medicine, University of Newcastle, Callaghan, NSW, Australia.,Priority Research Centre in Physical Activity and Nutrition, University of Newcastle, Callaghan, NSW, Australia
| |
Collapse
|
10
|
Shishtar E, Rogers GT, Blumberg JB, Au R, Jacques PF. Long-term dietary flavonoid intake and change in cognitive function in the Framingham Offspring cohort. Public Health Nutr 2020; 23:1576-1588. [PMID: 32090722 PMCID: PMC7196005 DOI: 10.1017/s136898001900394x] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 08/29/2019] [Accepted: 09/10/2019] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To examine the association between long-term intake of total and the six classes of dietary flavonoids and decline in cognitive function over a follow-up period of up to 15 years. DESIGN In this longitudinal study, we evaluated change in eight cognitive domain scores (verbal and visual memory, verbal learning, attention and concentration, abstract reasoning, language, visuoperceptual organisation and the global function) based on three neuropsychological exams and characterised the annualised change between consecutive exams. Long-term intakes of total and six flavonoid classes were assessed up to four times by a validated FFQ. Repeated-measures regression models were used to examine the longitudinal association between total and six flavonoid classes and annualised change in the eight cognitive domains. SETTING The Framingham Heart Study (FHS), a prospective cohort study. PARTICIPANTS One thousand seven hundred and seventy-nine subjects who were free of dementia, aged ≥45 years and had attended at least two of the last three FHS Offspring cohort study exams. RESULTS Over a median follow-up of 11·8 years with 1779 participants, nominally significant trends towards a slower decline in cognitive function were observed among those with higher flavanol and flavon-3-ol intakes for global function, verbal and visual memory; higher total flavonoids and flavonoid polymers for visual memory; and higher flavanols for verbal learning. CONCLUSIONS In spite of modest nominal trends, overall, our findings do not support a clear association between higher long-term flavonoid intake and slowing age-related cognitive decline.
Collapse
Affiliation(s)
- Esra Shishtar
- Nutritional Epidemiology Program, The Jean Mayer U.S.D.A. Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA
- The Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| | - Gail T Rogers
- Nutritional Epidemiology Program, The Jean Mayer U.S.D.A. Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA
| | - Jeffrey B Blumberg
- The Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| | - Rhoda Au
- The Framingham Heart Study, Boston University School of Medicine, Boston, MA, USA
- Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, MA, USA
- Department of Neurology, Boston University School of Medicine, Boston, MA, USA
- Department of Epidemiology, Boston University School of Public Health, Boston, MA, USA
- Boston University Alzheimer’s Disease Center and Boston University CTE Center, Boston University School of Medicine, Boston, MA, USA
| | - Paul F Jacques
- Nutritional Epidemiology Program, The Jean Mayer U.S.D.A. Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA
- The Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| |
Collapse
|
11
|
Shishtar E, Rogers GT, Blumberg JB, Au R, DeCarli C, Jacques PF. Flavonoid Intake and MRI Markers of Brain Health in the Framingham Offspring Cohort. J Nutr 2020; 150:1545-1553. [PMID: 32211795 PMCID: PMC7269753 DOI: 10.1093/jn/nxaa068] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 12/22/2019] [Accepted: 02/28/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Although greater flavonoid intake is associated with a reduced risk of Alzheimer's disease (AD) and related dementias (ADRD), evidence relating dietary flavonoid intake to brain health based on MRI is lacking. OBJECTIVE The objective of this study was to explore the association between dietary flavonoid intake and MRI measures of brain health, including total brain tissue volume (TBV), white matter hyperintensities volume (WMHV), and hippocampal volume (HV). METHODS Eligible subjects included members of the Framingham Heart Study Offspring Cohort who were free of stroke at exam 7 and had at least 1 valid food frequency questionnaire from exams 5, 6, or 7 (n = 2086; mean age at exam 7, 60.6 y). Flavonoid intakes represented the cumulative mean of intakes across the 3 exams and were categorized based on quartiles categories of intake. TBV, WMHV, and HV were assessed at exam 7. Multiple linear regression models were used to examine the cross-sectional association between total and the 6 classes of flavonoids and the 3 aforementioned MRI measures. RESULTS The mean (95% CI) of the WMHV of subjects in the highest quartile category of flavan-3-ols [0.56 (0.52, 0.61)] and flavonoid polymers [0.57 (0.52, 0.61)] intake was significantly smaller relative to that of subjects in the lowest quartile category of flavan-3-ols [0.65 (0.60, 0.71)] and flavonoid polymers [0.66 (0.60, 0.71)] after accounting for important demographic, lifestyle, and clinical factors. Inverse trend associations with WMHV were also seen for flavan-3-ols (P = 0.01) and flavonoid polymers (P = 0.01) as well as for total flavonoids (P = 0.01). TBV and HV were not associated with dietary flavonoid intake following the adjustment for potential confounders. CONCLUSIONS Our results contribute to the literature on flavonoids and ADRD as they suggest that higher flavonoid intakes may affect ADRD risk in middle-aged and older adults by reducing WMHV, a marker strongly associated with ADRD.
Collapse
Affiliation(s)
- Esra Shishtar
- Nutritional Epidemiology Program, Jean Mayer US Department of Agriculture, Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA
- The Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| | - Gail T Rogers
- Nutritional Epidemiology Program, Jean Mayer US Department of Agriculture, Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA
| | - Jeffrey B Blumberg
- The Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| | - Rhoda Au
- The Framingham Heart Study, Boston University School of Medicine, Boston, MA, USA
- Department of Anatomy and Neurobiology, Neurology and Boston University Alzheimer's Disease Center and Boston University CTE Center, Boston University School of Medicine, Boston, MA, USA
- Department of Epidemiology, Boston University School of Public Health, Boston, MA, USA
| | - Charles DeCarli
- Department of Neurology and Center for Neuroscience, University of California at Davis, Davis, CA, USA
| | - Paul F Jacques
- Nutritional Epidemiology Program, Jean Mayer US Department of Agriculture, Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA
- The Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
| |
Collapse
|
12
|
Ha K, Kim K, Sakaki JR, Chun OK. Relative Validity of Dietary Total Antioxidant Capacity for Predicting All-Cause Mortality in Comparison to Diet Quality Indexes in US Adults. Nutrients 2020; 12:E1210. [PMID: 32344879 PMCID: PMC7282024 DOI: 10.3390/nu12051210] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 04/12/2020] [Accepted: 04/22/2020] [Indexed: 01/17/2023] Open
Abstract
While traditionally diet quality index scores (DQIS) as noted later in this abstract have been used to predict health outcomes, dietary total antioxidant capacity (TAC), a useful tool for assessing total antioxidant power in the diet, may also be a novel predictor. This study evaluated the associations between dietary TAC and DQIS and all-cause mortality. Based on the National Health and Nutrition Examination Survey (NHANES) 1988-1994 and 1999-2006, 23,797 US adults were followed-up until 2015. Dietary TAC and DQIS including the Healthy Eating Index-2015 (HEI-2015), Alternative Healthy Eating Index-2010 (AHEI-2010), alternate Mediterranean Diet (aMED), and Dietary Approaches to Stop Hypertension (DASH) were calculated using a 1-day 24 h dietary recall. US adults in the highest quintiles of DQIS had lower rates of all-cause mortality compared to those in the lowest quintiles (HEI-2015 hazard ratio (HR): 0.87, 95% confidence interval (CI): 0.77-0.98; AHEI-2010 HR: 0.84, 95% CI: 0.74-0.94; aMED HR: 0.79, 95% CI: 0.69-0.90; DASH HR: 0.80, 95% CI: 0.70-0.92). Similarly, those in the highest quintile of dietary TAC also had a lower all-cause mortality than those in the lowest quintile (HR: 0.88, 95% CI: 0.79-0.98). These findings suggest that dietary TAC might be a relatively valid predictor of all-cause mortality in the US population compared to the DQIS.
Collapse
Affiliation(s)
- Kyungho Ha
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA; (K.H.); (K.K.); (J.R.S.)
| | - Kijoon Kim
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA; (K.H.); (K.K.); (J.R.S.)
- Department of Food and Nutrition, Sookmyung Women’s University, Seoul 04310, Korea
| | - Junichi R. Sakaki
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA; (K.H.); (K.K.); (J.R.S.)
| | - Ock K. Chun
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA; (K.H.); (K.K.); (J.R.S.)
| |
Collapse
|
13
|
Hati S, Ningtyas DW, Khanuja JK, Prakash S. β-Glucosidase from almonds and yoghurt cultures in the biotransformation of isoflavones in soy milk. FOOD BIOSCI 2020. [DOI: 10.1016/j.fbio.2020.100542] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
14
|
Jun SH, Shin WK, Kim Y. Association of Soybean Food Intake and Cardiometabolic Syndrome in Korean Women: Korea National Health and Nutrition Examination Survey (2007 to 2011). Diabetes Metab J 2020; 44:143-157. [PMID: 31950771 PMCID: PMC7043982 DOI: 10.4093/dmj.2019.0078] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 09/14/2019] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND Soybean food consumption has been considered as a possible way to lower incidence of cardiometabolic syndrome (CMS) among Asians. However, results from studies investigating its efficacy on CMS in Asians have been inconsistent. METHODS We analyzed the association between soybean intake frequency and prevalence of CMS based on data from the Korea National Health and Nutrition Examination Survey 2007 to 2011. Data of 9,287 women aged 20 to 64 years were analyzed. Food frequency questionnaire was used to assess soybean food consumption frequency. General linear model and multivariable logistic regression model were used to examine the association of soybean intake quintile with CMS and its risk factors. Least square means of metabolic factors mostly showed no significant relevance except liver indexes. RESULTS Compared to participants in the 1st quintile (<2 times/week of soybean food), odds ratios (OR) for CMS and abdominal obesity (AO) in the 4th quintile (8.5 times/week<soybean food≤17 times/week) were 0.73 (95% confidence interval [CI], 0.57 to 0.95) and 0.72 (95% CI, 0.58 to 0.90), respectively. After excluding Tofu products, ORs of CMS, AO, high blood pressure, and hypertriglyceridemia were lower than those without excluding Tofu products. However, results still did not show significant inverse linear trend across frequency quintiles. CONCLUSION Our findings suggest that soybean intake of 8.5 to 17 times/week was inversely associated with CMS in Korean women. The relation between soybean intake >17 times/week and CMS varied depending on soybean food items.
Collapse
Affiliation(s)
- Sook Hyun Jun
- Department of Human Ecology, Graduate School of Korea University, Seoul, Korea
| | - Woo Kyoung Shin
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea.
| | - Yookyung Kim
- Department of Human Ecology, Graduate School of Korea University, Seoul, Korea.
| |
Collapse
|
15
|
Liu J, He Z, Ma N, Chen ZY. Beneficial Effects of Dietary Polyphenols on High-Fat Diet-Induced Obesity Linking with Modulation of Gut Microbiota. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:33-47. [PMID: 31829012 DOI: 10.1021/acs.jafc.9b06817] [Citation(s) in RCA: 112] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Obesity is caused by an imbalance of energy intake and expenditure. It is characterized by a higher accumulation of body fat with a chronic low-grade inflammation. Many reports have shown that gut microbiota in the host plays a pivotal role in mediating the interaction between consumption of a high-fat diet (HFD) and onset of obesity. Accumulative evidence has suggested that the changes in the composition of gut microbiota may affect the host's energy homeostasis, systemic inflammation, lipid metabolism, and insulin sensitivity. As one of the major components in human diet, polyphenols have demonstrated to be capable of modulating the composition of gut microbiota and reducing the HFD-induced obesity. The present review summarizes the findings of recent studies on dietary polyphenols regarding their metabolism and interaction with bacteria in the intestine as well as the underlying mechanisms by which they modulate the gut microbiota and alleviate the HFD-induced obesity.
Collapse
Affiliation(s)
- Jianhui Liu
- College of Food Science and Engineering , Nanjing University of Finance & Economics , Nanjing , China
- School of Life Sciences , The Chinese University of Hong Kong , Shatin NT , Hong Kong , China
| | - Zouyan He
- School of Life Sciences , The Chinese University of Hong Kong , Shatin NT , Hong Kong , China
| | - Ning Ma
- College of Food Science and Engineering , Nanjing University of Finance & Economics , Nanjing , China
- School of Life Sciences , The Chinese University of Hong Kong , Shatin NT , Hong Kong , China
| | - Zhen-Yu Chen
- School of Life Sciences , The Chinese University of Hong Kong , Shatin NT , Hong Kong , China
| |
Collapse
|
16
|
Choi PM, Tscharke BJ, Donner E, O'Brien JW, Grant SC, Kaserzon SL, Mackie R, O'Malley E, Crosbie ND, Thomas KV, Mueller JF. Wastewater-based epidemiology biomarkers: Past, present and future. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.06.004] [Citation(s) in RCA: 221] [Impact Index Per Article: 36.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
17
|
Rohrmann S, Shvetsov YB, Morimoto Y, Wilkens LR, Monroe KR, Le Marchand L, Franke AA, Kolonel LN, Maskarinec G. Self-reported dietary flavonoid intake and serum markers of inflammation: the multiethnic cohort. Cancer Causes Control 2018; 29:601-607. [PMID: 29671182 PMCID: PMC6180210 DOI: 10.1007/s10552-018-1034-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2016] [Accepted: 04/13/2018] [Indexed: 12/28/2022]
Abstract
PURPOSE To examine if dietary intake of foods rich in flavonoids, which have been shown to be inversely associated with chronic diseases, is associated with inflammatory processes. METHODS This analysis includes controls of case-control studies nested within the Multiethnic Cohort (MEC) who completed a validated food frequency questionnaire at cohort entry. Biomarkers were assessed in blood donated during follow-up (mean = 9.6 years). We used multivariate linear regression adjusted for potential confounders to estimate associations between intake of flavanones, flavonols, and isoflavones and levels of adiponectin, leptin, C-reactive protein, interleukin (IL)-1β, IL-6, IL-10, and tumor necrosis factor-α. RESULTS Among the 1,287 participants, the respective median intakes of flavanones, flavonols, and isoflavones were 26.5, 12.4, and 1.3 mg/day at cohort entry. With the exception of flavanone intake, which was statistically significantly inversely associated with adiponectin (p = 0.01) and IL-6 concentrations (p = 0.01), none of the examined flavonoids was related with levels of adipokines or inflammatory markers. Heterogeneity by ethnicity was only observed for flavonol intake and IL-10 (pinteraction = 0.04) and may be the result of multiple testing. These null findings were confirmed in a subset of participants who completed a second dietary history within 2.6 years of blood draw. CONCLUSION The current results do not support a consistent association between dietary intake of flavonoids and markers of inflammatory processes.
Collapse
Affiliation(s)
- Sabine Rohrmann
- Division of Chronic Disease Epidemiology, Epidemiology, Biostatistics and Prevention Institute (EBPI), University of Zurich, Hirschengraben 84, 8001, Zürich, Switzerland.
| | - Yurii B Shvetsov
- Epidemiology Program, University of Hawaii Cancer Center, Honolulu, HI, USA
| | - Yukiko Morimoto
- Epidemiology Program, University of Hawaii Cancer Center, Honolulu, HI, USA
| | - Lynne R Wilkens
- Epidemiology Program, University of Hawaii Cancer Center, Honolulu, HI, USA
| | - Kristine R Monroe
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Loïc Le Marchand
- Epidemiology Program, University of Hawaii Cancer Center, Honolulu, HI, USA
| | - Adrian A Franke
- Epidemiology Program, University of Hawaii Cancer Center, Honolulu, HI, USA
| | - Laurence N Kolonel
- Epidemiology Program, University of Hawaii Cancer Center, Honolulu, HI, USA
| | | |
Collapse
|
18
|
Clark JL, Taylor CG, Zahradka P. Rebelling against the (Insulin) Resistance: A Review of the Proposed Insulin-Sensitizing Actions of Soybeans, Chickpeas, and Their Bioactive Compounds. Nutrients 2018; 10:E434. [PMID: 29601521 PMCID: PMC5946219 DOI: 10.3390/nu10040434] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 03/25/2018] [Accepted: 03/28/2018] [Indexed: 12/24/2022] Open
Abstract
Insulin resistance is a major risk factor for diseases such as type 2 diabetes and metabolic syndrome. Current methods for management of insulin resistance include pharmacological therapies and lifestyle modifications. Several clinical studies have shown that leguminous plants such as soybeans and pulses (dried beans, dried peas, chickpeas, lentils) are able to reduce insulin resistance and related type 2 diabetes parameters. However, to date, no one has summarized the evidence supporting a mechanism of action for soybeans and pulses that explains their ability to lower insulin resistance. While it is commonly assumed that the biological activities of soybeans and pulses are due to their antioxidant activities, these bioactive compounds may operate independent of their antioxidant properties and, thus, their ability to potentially improve insulin sensitivity via alternative mechanisms needs to be acknowledged. Based on published studies using in vivo and in vitro models representing insulin resistant states, the proposed mechanisms of action for insulin-sensitizing actions of soybeans, chickpeas, and their bioactive compounds include increasing glucose transporter-4 levels, inhibiting adipogenesis by down-regulating peroxisome proliferator-activated receptor-γ, reducing adiposity, positively affecting adipokines, and increasing short-chain fatty acid-producing bacteria in the gut. Therefore, this review will discuss the current evidence surrounding the proposed mechanisms of action for soybeans and certain pulses, and their bioactive compounds, to effectively reduce insulin resistance.
Collapse
Affiliation(s)
- Jaime L Clark
- Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada.
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.
| | - Carla G Taylor
- Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada.
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.
- Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, MB R3E 0T5, Canada.
| | - Peter Zahradka
- Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada.
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.
- Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, MB R3E 0T5, Canada.
| |
Collapse
|
19
|
Monteiro NE, Queirós LD, Lopes DB, Pedro AO, Macedo GA. Impact of microbiota on the use and effects of isoflavones in the relief of climacteric symptoms in menopausal women – A review. J Funct Foods 2018. [DOI: 10.1016/j.jff.2017.12.043] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
|
20
|
Patisaul HB. Endocrine disruption by dietary phyto-oestrogens: impact on dimorphic sexual systems and behaviours. Proc Nutr Soc 2017; 76:130-144. [PMID: 27389644 PMCID: PMC5646220 DOI: 10.1017/s0029665116000677] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A wide range of health benefits have been ascribed to soya intake including a lowered risk of osteoporosis, heart disease, breast cancer, and menopausal symptoms. Because it is a hormonally active diet, however, soya can also be endocrine disrupting, suggesting that intake has the potential to cause adverse health effects in certain circumstances, particularly when exposure occurs during development. Consequently, the question of whether or not soya phyto-oestrogens are beneficial or harmful to human health is neither straightforward nor universally applicable to all groups. Possible benefits and risks depend on age, health status, and even the presence or absence of specific gut microflora. As global consumption increases, greater awareness and consideration of the endocrine-disrupting properties of soya by nutrition specialists and other health practitioners is needed. Consumption by infants and small children is of particular concern because their hormone-sensitive organs, including the brain and reproductive system, are still undergoing sexual differentiation and maturation. Thus, their susceptibility to the endocrine-disrupting activities of soya phyto-oestrogens may be especially high. As oestrogen receptor partial agonists with molecular and cellular properties similar to anthropogenic endocrine disruptors such as bisphenol A, the soya phyto-oestrogens provide an interesting model for how attitudes about what is 'synthetic' v. what is 'natural,' shapes understanding and perception of what it means for a compound to be endocrine disrupting and/or potentially harmful. This review describes the endocrine-disrupting properties of soya phyto-oestrogens with a focus on neuroendocrine development and behaviour.
Collapse
Affiliation(s)
- Heather B Patisaul
- Department of Biological Sciences,Center for Human Health and the Environment,NC State University,Raleigh,NC 27695,USA
| |
Collapse
|
21
|
Frankenfeld CL. Cardiometabolic risk and gut microbial phytoestrogen metabolite phenotypes. Mol Nutr Food Res 2016; 61. [DOI: 10.1002/mnfr.201500900] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 06/18/2016] [Accepted: 07/14/2016] [Indexed: 12/18/2022]
Affiliation(s)
- Cara L. Frankenfeld
- Department of Global and Community Health; George Mason University; Fairfax VA USA
| |
Collapse
|
22
|
Mínguez-Alarcón L, Gaskins AJ, Chiu YH, Souter I, Williams PL, Calafat AM, Hauser R, Chavarro JE. Dietary folate intake and modification of the association of urinary bisphenol A concentrations with in vitro fertilization outcomes among women from a fertility clinic. Reprod Toxicol 2016; 65:104-112. [PMID: 27423903 DOI: 10.1016/j.reprotox.2016.07.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 07/05/2016] [Accepted: 07/12/2016] [Indexed: 01/08/2023]
Abstract
Experimental data in rodents suggest that the effects of bisphenol A (BPA) on oocyte development may be modified by dietary methyl donors. Whether the same interaction exists in humans is unknown. We evaluated whether intake of methyl donors modified the associations between urinary BPA concentrations and treatment outcomes among 178 women who underwent 248 IVF cycles at a fertility center in Boston between 2007 and 2012. Participants completed a validated food frequency questionnaire and provided up to two urine samples per treatment cycle. High urinary BPA concentrations were associated with a 66% lower probability of implantation (p=0.007) among women who consumed <400μg/day of food folate, but not among women consuming ≥400μg/day (21% higher probability of implantation, p=0.18) (p,interaction=0.04). A similar pattern was observed for probability of clinical pregnancy (p,interaction=0.07) and live birth (p,interaction=0.16). These results are consistent with previous animal data but further evaluation in other human populations is needed.
Collapse
Affiliation(s)
- Lidia Mínguez-Alarcón
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, United States.
| | - Audrey J Gaskins
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, United States; Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, United States
| | - Yu-Han Chiu
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, United States; Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, United States
| | - Irene Souter
- Vincent Obstetrics and Gynecology, Massachusetts General Hospital and Harvard Medical School, Boston, United States
| | - Paige L Williams
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, United States; Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, United States
| | - Antonia M Calafat
- National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, United States
| | - Russ Hauser
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, United States; Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, United States; Vincent Obstetrics and Gynecology, Massachusetts General Hospital and Harvard Medical School, Boston, United States
| | - Jorge E Chavarro
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, United States; Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, United States; Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, United States
| | | |
Collapse
|
23
|
Chavarro JE, Mínguez-Alarcón L, Chiu YH, Gaskins AJ, Souter I, Williams PL, Calafat AM, Hauser R. Soy Intake Modifies the Relation Between Urinary Bisphenol A Concentrations and Pregnancy Outcomes Among Women Undergoing Assisted Reproduction. J Clin Endocrinol Metab 2016; 101:1082-90. [PMID: 26815879 PMCID: PMC4803173 DOI: 10.1210/jc.2015-3473] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT Experimental data in rodents suggest that the adverse reproductive health effects of bisphenol A (BPA) can be modified by intake of soy phytoestrogens. Whether the same is true in humans is not known. OBJECTIVE The purpose of this study was to evaluate whether soy consumption modifies the relation between urinary BPA levels and infertility treatment outcomes among women undergoing assisted reproduction. SETTING The study was conducted in a fertility center in a teaching hospital. DESIGN We evaluated 239 women enrolled between 2007 and 2012 in the Environment and Reproductive Health (EARTH) Study, a prospective cohort study, who underwent 347 in vitro fertilization (IVF) cycles. Participants completed a baseline questionnaire and provided up to 2 urine samples in each treatment cycle before oocyte retrieval. IVF outcomes were abstracted from electronic medical records. We used generalized linear mixed models with interaction terms to evaluate whether the association between urinary BPA concentrations and IVF outcomes was modified by soy intake. MAIN OUTCOME MEASURE Live birth rates per initiated treatment cycle were measured. RESULTS Soy food consumption modified the association of urinary BPA concentration with live birth rates (P for interaction = .01). Among women who did not consume soy foods, the adjusted live birth rates per initiated cycle in increasing quartiles of cycle-specific urinary BPA concentrations were 54%, 35%, 31%, and 17% (P for trend = .03). The corresponding live birth rates among women reporting pretreatment consumption of soy foods were 38%, 42%, 47%, and 49% (P for trend = 0.35). A similar pattern was found for implantation (P for interaction = .02) and clinical pregnancy rates (P for interaction = .03) per initiated cycle, where urinary BPA was inversely related to these outcomes among women not consuming soy foods but unrelated to them among soy consumers. CONCLUSION Soy food intake may protect against the adverse reproductive effects of BPA. As these findings represent the first report suggesting a potential interaction between soy and BPA in humans, they should be further evaluated in other populations.
Collapse
Affiliation(s)
- Jorge E Chavarro
- Department of Nutrition (J.E.C., Y.-H.C., A.J.G.), Department of Epidemiology (J.E.C., A.J.G., R.H.), Department of Environmental Health (L.M.-A., R.H.), and Department of Biostatistics (P.L.W.), Harvard T. H. Chan School of Public Health, Boston, Massachusetts 02115; Channing Division of Network Medicine (J.E.C.), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115; Vincent Obstetrics and Gynecology (I.S., R.H.), Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114; and National Center for Environmental Health (A.M.C.), Centers for Disease Control and Prevention, Atlanta, Georgia 30329
| | - Lidia Mínguez-Alarcón
- Department of Nutrition (J.E.C., Y.-H.C., A.J.G.), Department of Epidemiology (J.E.C., A.J.G., R.H.), Department of Environmental Health (L.M.-A., R.H.), and Department of Biostatistics (P.L.W.), Harvard T. H. Chan School of Public Health, Boston, Massachusetts 02115; Channing Division of Network Medicine (J.E.C.), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115; Vincent Obstetrics and Gynecology (I.S., R.H.), Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114; and National Center for Environmental Health (A.M.C.), Centers for Disease Control and Prevention, Atlanta, Georgia 30329
| | - Yu-Han Chiu
- Department of Nutrition (J.E.C., Y.-H.C., A.J.G.), Department of Epidemiology (J.E.C., A.J.G., R.H.), Department of Environmental Health (L.M.-A., R.H.), and Department of Biostatistics (P.L.W.), Harvard T. H. Chan School of Public Health, Boston, Massachusetts 02115; Channing Division of Network Medicine (J.E.C.), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115; Vincent Obstetrics and Gynecology (I.S., R.H.), Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114; and National Center for Environmental Health (A.M.C.), Centers for Disease Control and Prevention, Atlanta, Georgia 30329
| | - Audrey J Gaskins
- Department of Nutrition (J.E.C., Y.-H.C., A.J.G.), Department of Epidemiology (J.E.C., A.J.G., R.H.), Department of Environmental Health (L.M.-A., R.H.), and Department of Biostatistics (P.L.W.), Harvard T. H. Chan School of Public Health, Boston, Massachusetts 02115; Channing Division of Network Medicine (J.E.C.), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115; Vincent Obstetrics and Gynecology (I.S., R.H.), Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114; and National Center for Environmental Health (A.M.C.), Centers for Disease Control and Prevention, Atlanta, Georgia 30329
| | - Irene Souter
- Department of Nutrition (J.E.C., Y.-H.C., A.J.G.), Department of Epidemiology (J.E.C., A.J.G., R.H.), Department of Environmental Health (L.M.-A., R.H.), and Department of Biostatistics (P.L.W.), Harvard T. H. Chan School of Public Health, Boston, Massachusetts 02115; Channing Division of Network Medicine (J.E.C.), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115; Vincent Obstetrics and Gynecology (I.S., R.H.), Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114; and National Center for Environmental Health (A.M.C.), Centers for Disease Control and Prevention, Atlanta, Georgia 30329
| | - Paige L Williams
- Department of Nutrition (J.E.C., Y.-H.C., A.J.G.), Department of Epidemiology (J.E.C., A.J.G., R.H.), Department of Environmental Health (L.M.-A., R.H.), and Department of Biostatistics (P.L.W.), Harvard T. H. Chan School of Public Health, Boston, Massachusetts 02115; Channing Division of Network Medicine (J.E.C.), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115; Vincent Obstetrics and Gynecology (I.S., R.H.), Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114; and National Center for Environmental Health (A.M.C.), Centers for Disease Control and Prevention, Atlanta, Georgia 30329
| | - Antonia M Calafat
- Department of Nutrition (J.E.C., Y.-H.C., A.J.G.), Department of Epidemiology (J.E.C., A.J.G., R.H.), Department of Environmental Health (L.M.-A., R.H.), and Department of Biostatistics (P.L.W.), Harvard T. H. Chan School of Public Health, Boston, Massachusetts 02115; Channing Division of Network Medicine (J.E.C.), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115; Vincent Obstetrics and Gynecology (I.S., R.H.), Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114; and National Center for Environmental Health (A.M.C.), Centers for Disease Control and Prevention, Atlanta, Georgia 30329
| | - Russ Hauser
- Department of Nutrition (J.E.C., Y.-H.C., A.J.G.), Department of Epidemiology (J.E.C., A.J.G., R.H.), Department of Environmental Health (L.M.-A., R.H.), and Department of Biostatistics (P.L.W.), Harvard T. H. Chan School of Public Health, Boston, Massachusetts 02115; Channing Division of Network Medicine (J.E.C.), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115; Vincent Obstetrics and Gynecology (I.S., R.H.), Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114; and National Center for Environmental Health (A.M.C.), Centers for Disease Control and Prevention, Atlanta, Georgia 30329
| | | |
Collapse
|
24
|
Golpour S, Rafie N, Safavi SM, Miraghajani M. Dietary isoflavones and gastric cancer: A brief review of current studies. JOURNAL OF RESEARCH IN MEDICAL SCIENCES 2016; 20:893-900. [PMID: 26759578 PMCID: PMC4696376 DOI: 10.4103/1735-1995.170627] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Background: Although several in vitro and animal studies have suggested that isoflavones might exert inhibitory effects on gastric carcinogenesis, epidemiologic studies have reported inconclusive results in this field. The aim of this brief review was to investigate whether such an association exists among dietary isoflavones and gastric cancer incidence, prevention, and mortality in epidemiologic studies. Materials and Methods: We conducted a search of PubMed, Google Scholar, Cochrane, Science direct, and Iranian Scientific Databases including Scientific Information Database and IranMedex Database (up to November 2014) using common keywords for studies that focused on dietary isoflavones and gastric cancer risk. Results: A total of nine epidemiologic studies consisting of five case-controls, three prospective cohorts, and one ecologic study were included in this review. An inverse association between dietary isoflavones and gastric cancer was shown in only one case-control and one ecologic study. Conclusion: In summary, whether anticarcinogenic properties of isoflavones are established, research found no substantial correlation in this field. There are insufficient studies to draw any firm conclusions about the relationship between isoflavones intake and the risk of gastric cancer. Hence, further evidence from cohort and trial studies are needed.
Collapse
Affiliation(s)
- Sahar Golpour
- Department of Community Nutrition, Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Nahid Rafie
- Department of Community Nutrition, Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Seyyed Morteza Safavi
- Department of Community Nutrition, Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Maryam Miraghajani
- Department of Community Nutrition, Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran
| |
Collapse
|
25
|
Greater Total Antioxidant Capacity from Diet and Supplements Is Associated with a Less Atherogenic Blood Profile in U.S. Adults. Nutrients 2016; 8:nu8010015. [PMID: 26742057 PMCID: PMC4728629 DOI: 10.3390/nu8010015] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 12/07/2015] [Accepted: 12/14/2015] [Indexed: 12/31/2022] Open
Abstract
Evidence from epidemiologic studies has shown that total antioxidant capacity (TAC) in the diet might be inversely associated with stroke, heart failure, and inflammatory biomarkers. However, studies on the association of TAC from both diet and supplements with cardiovascular disease (CVD) risk factors in the U.S. population are lacking. This cross-sectional population-based study aimed to investigate the association of TAC with both diet and supplements with CVD risk factors among 4039 U.S. adults in National Health and Nutrition Examination Survey (NHANES) 2007–2012. TAC from both food sources and dietary supplements was estimated from two 24-h dietary recalls using the NHANES supplement ingredient database, United States Department of Agriculture (USDA) proanthocyanidin, flavonoid, and isoflavone databases. Top contributors to TAC were tea, antioxidant supplements, vegetable mixture, orange juice, berries, and wine. Antioxidant supplement users had 1.6 times higher TAC than non-users. Greater TAC was associated with reduced triglycerides (TG) (−1.39% change; 95% CI = −2.56 to −0.21), TG to high-density lipoprotein cholesterol (HDL-C) ratio (−2.03% change; 95% CI = −3.45 to −0.60), HDL-C (0.65% change; 95% CI = 0.07 to 1.23), insulin (−1.37% change; 95% CI = −2.64 to −0.09), homeostasis model assessment of insulin resistance (HOMA-IR) (−1.57% change; 95% CI = −3.02 to −0.09) and C-reactive protein (CRP) (−0.83% change; 95% CI = −1.29 to −0.38) after adjusting for potential confounders. There was no significant association between TAC and waist circumference, BMI, blood pressure, low-density lipoprotein cholesterol (LDL-C), total cholesterol (TC), and fasting glucose. The findings of this study support the hypothesis that an antioxidant-rich diet and intake of supplements are beneficial to reduce CVD risk.
Collapse
|
26
|
Zheng X, Lee SK, Chun OK. Soy Isoflavones and Osteoporotic Bone Loss: A Review with an Emphasis on Modulation of Bone Remodeling. J Med Food 2016; 19:1-14. [PMID: 26670451 PMCID: PMC4717511 DOI: 10.1089/jmf.2015.0045] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 10/21/2015] [Indexed: 12/21/2022] Open
Abstract
Osteoporosis is an age-related disorder that affects both women and men, although estrogen deficiency induced by menopause accelerates bone loss in older women. As the demographic shifts to a more aged population, a growing number of men and women will be afflicted with osteoporosis. Since the current drug therapies available have multiple side effects, including increased risk of developing certain types of cancer or complications, a search for potential nonpharmacologic alternative therapies for osteoporosis is of prime interest. Soy isoflavones (SI) have demonstrated potential bone-specific effects in a number of studies. This article provides a systematic review of studies on osteoporotic bone loss in relation to SI intake from diet or supplements to comprehensively explain how SI affect the modulation of bone remodeling. Evidence from epidemiologic studies supports that dietary SI attenuate menopause-induced osteoporotic bone loss by decreasing bone resorption and stimulating bone formation. Other studies have also illustrated that bone site-specific trophic and synergistic effects combined with exercise intervention might contribute to improve the bioavailability of SI or strengthen the bone-specific effects. To date, however, the effects of dietary SI on osteoporotic bone loss remain inconclusive, and study results vary from study to study. The current review will discuss the potential factors that result in the conflicting outcomes of these studies, including dosages, intervention materials, study duration, race, and genetic differences. Further well-designed studies are needed to fully understand the underlying mechanism and evaluate the effects of SI on osteoporosis in humans.
Collapse
Affiliation(s)
- Xi Zheng
- Department of Nutritional Sciences, University of Connecticut, Storrs, Connecticut, USA
| | - Sun-Kyeong Lee
- Center on Aging, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Ock K. Chun
- Department of Nutritional Sciences, University of Connecticut, Storrs, Connecticut, USA
| |
Collapse
|
27
|
Abstract
This study examines the relationship between long-term intake of six flavonoid classes and incidence of CVD and CHD, using a comprehensive flavonoid database and repeated measures of intake, while accounting for possible confounding by components of a healthy dietary pattern. Flavonoid intakes were assessed using a FFQ among the Framingham Offspring Cohort at baseline and three times during follow-up. Cox proportional hazards regression was used to characterise prospective associations between the natural logarithms of flavonoid intakes and CVD incidence using a time-dependent approach, in which intake data were updated at each examination to represent average intakes from previous examinations. Mean baseline age was 54 years, and 45 % of the population was male. Over an average 14·9 years of follow-up among 2880 participants, there were 518 CVD events and 261 CHD events. After multivariable adjustment, only flavonol intake was significantly associated with lower risk of CVD incidence (hazard ratios (HR) per 2·5-fold flavonol increase=0·86, Ptrend=0·05). Additional adjustment for total fruit and vegetable intake and overall diet quality attenuated this observation (HR=0·89, Ptrend=0·20 and HR=0·92, Ptrend=0·33, respectively). There were no significant associations between flavonoids and CHD incidence after multivariable adjustment. Our findings suggest that the observed association between flavonol intake and CVD risk may be a consequence of better overall diet. However, the strength of this non-significant association was also consistent with relative risks observed in previous meta-analyses, and therefore a modest benefit of flavonol intake on CVD risk cannot be ruled out.
Collapse
|
28
|
Mínguez-Alarcón L, Afeiche MC, Chiu YH, Vanegas JC, Williams PL, Tanrikut C, Toth TL, Hauser R, Chavarro JE. Male soy food intake was not associated with in vitro fertilization outcomes among couples attending a fertility center. Andrology 2015; 3:702-8. [PMID: 26097060 DOI: 10.1111/andr.12046] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Revised: 04/01/2015] [Accepted: 04/06/2015] [Indexed: 01/17/2023]
Abstract
Male factor etiology may be a contributing factor in up to 60% of infertility cases. Dietary intake of phytoestrogens has been related to abnormal semen quality and hormone levels. However, its effect on couple fecundity is still unclear. Intake of soy products was assessed in 184 men from couples undergoing infertility treatment with in vitro fertilization. Couples were recruited between February 2007 and May 2014 and prospectively followed to document treatment outcomes including fertilization, implantation, clinical pregnancy and live birth. Multivariate generalized linear mixed models with random intercepts, binomial distribution and logit link function were used to examine this relation while accounting for repeated treatment cycles and adjusting for potential confounders. Male partner's intake of soy foods and soy isoflavones was unrelated to fertilization rates, the proportions of poor quality embryos, accelerated or slow embryo cleavage rate, and implantation, clinical pregnancy and live birth. The adjusted live birth rates per initiated cycle (95% CI) for partners of men in increasing categories of soy food intake were 0.36 (0.28-0.45), 0.42 (0.29-0.56), 0.36 (0.24-0.51), and 0.37 (0.24-0.52), respectively. Soy food intake in men was not related to clinical outcomes among couples presenting at an infertility clinic. Data on the relation between phytoestrogens and male reproductive potential remain scarce and additional research is required to clarify its role in human reproduction.
Collapse
Affiliation(s)
- L Mínguez-Alarcón
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - M C Afeiche
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - Y-H Chiu
- Department of Nutrition, Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - J C Vanegas
- Pontificia University Javeriana Medical School, Bogota, Colombia
| | - P L Williams
- Department of Biostatistics, Harvard T. H. Chan School of Public Health, Boston, MA, USA.,Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - C Tanrikut
- Department of Urology, Massachusetts General Hospital, Boston, MA, USA.,Department of Surgery, Harvard Medical School, Boston, MA, USA
| | - T L Toth
- Vincent Obstetrics and Gynecology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - R Hauser
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, MA, USA.,Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA, USA.,Vincent Obstetrics and Gynecology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - J E Chavarro
- Department of Nutrition, Harvard T. H. Chan School of Public Health, Boston, MA, USA.,Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA, USA.,Channing Laboratory, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| |
Collapse
|
29
|
Kim K, Vance TM, Chun OK. Estimated intake and major food sources of flavonoids among US adults: changes between 1999-2002 and 2007-2010 in NHANES. Eur J Nutr 2015; 55:833-843. [PMID: 26026481 DOI: 10.1007/s00394-015-0942-x] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Accepted: 05/23/2015] [Indexed: 12/14/2022]
Abstract
PURPOSE This study was conducted to: (1) demonstrate an updated method for estimating flavonoid intake of US adults by combining USDA flavonoid databases and NHANES food consumption data; (2) document the intake and major food sources of flavonoids among US adults; and (3) determine whether the intake and major sources of dietary flavonoids have changed during the past decade in the USA. METHODS A cross-sectional population-based study. Differences over time in the average daily intake and food sources of flavonoids were estimated using food consumption data from NHANES 1999-2002 (n = 8833) and 2007-2010 (n = 9801). RESULTS The total flavonoid intake of US adults aged 19 years and older remained unchanged between 1999-2002 (201.9 mg/d) and 2007-2010 (200.1 mg/d), with tea being the top food source of flavonoids. However, intake of anthocyanidins increased during this period, mainly due to greater consumption of berries and wine, which was consistent with the increase in per capita consumption of these foods based on USDA food availability data. CONCLUSIONS The results of this study provide updated information on flavonoid intake and food contributors and warrant further studies on the health implications of flavonoid intake.
Collapse
Affiliation(s)
- Kijoon Kim
- Department of Nutritional Sciences, University of Connecticut, 3624 Horsebarn Road Extension Unit 4017, Storrs, CT, 06269-4017, USA.,BOM Research Institute, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Korea
| | - Terrence M Vance
- Department of Nutritional Sciences, University of Connecticut, 3624 Horsebarn Road Extension Unit 4017, Storrs, CT, 06269-4017, USA
| | - Ock K Chun
- Department of Nutritional Sciences, University of Connecticut, 3624 Horsebarn Road Extension Unit 4017, Storrs, CT, 06269-4017, USA.
| |
Collapse
|
30
|
Talaei M, Pan A. Role of phytoestrogens in prevention and management of type 2 diabetes. World J Diabetes 2015; 6:271-283. [PMID: 25789108 PMCID: PMC4360420 DOI: 10.4239/wjd.v6.i2.271] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2014] [Revised: 11/04/2014] [Accepted: 12/17/2014] [Indexed: 02/05/2023] Open
Abstract
Type 2 diabetes (T2D) has become a major public health threat across the globe. It has been widely acknowledged that diet plays an important role in the development and management of T2D. Phytoestrogens are polyphenols that are structurally similar to endogenous estrogen and have weak estrogenic properties. Emerging evidence from pre-clinical models has suggested that phytoestrogens may have anti-diabetic function via both estrogen-dependent and estrogen-independent pathways. In the current review, we have summarized the evidence linking two major types of phytoestrogens, isoflavones and lignans, and T2D from epidemiological studies and clinical trials. The cross-sectional and prospective cohort studies have reported inconsistent results, which may due to the large variations in different populations and measurement errors in dietary intakes. Long-term intervention studies
using isoflavone supplements have reported potential beneficial effects on glycemic parameters in postmenopausal women, while results from short-term small-size clinical trials are conflicting. Taken together, the current evidence from different study designs is complex and inconsistent. Although the widespread use of phytoestrogens could not be recommended yet, habitual consumption of phytoestrogens, particularly their intact food sources like soy and whole flaxseed, could be considered as a component of overall healthy dietary pattern for prevention and management of T2D.
Collapse
|
31
|
Vanegas JC, Afeiche MC, Gaskins AJ, Mínguez-Alarcón L, Williams PL, Wright DL, Toth TL, Hauser R, Chavarro JE. Soy food intake and treatment outcomes of women undergoing assisted reproductive technology. Fertil Steril 2015; 103:749-55.e2. [PMID: 25577465 DOI: 10.1016/j.fertnstert.2014.12.104] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 12/04/2014] [Accepted: 12/08/2014] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To study the relation of dietary phytoestrogens intake and clinical outcomes of women undergoing infertility treatment with the use of assisted reproductive technology (ART). DESIGN Prospective cohort study. SETTING Fertility center. PATIENT(S) A total of 315 women who collectively underwent 520 ART cycles from 2007 to 2013. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) Implantation, clinical pregnancy, and live birth rates per initiated cycle. RESULT(S) Soy isoflavones intake was positively related to live birth rates in ART. Compared with women who did not consume soy isoflavones, the multivariable-adjusted odds ratios of live birth (95% confidence interval) for women in increasing categories of soy isoflavones intake were 1.32 (0.76-2.27) for women consuming 0.54-2.63 mg/d, 1.87 (1.12-3.14) for women consuming 2.64-7.55 mg/d, and 1.77 (1.03-3.03) for women consuming 7.56-27.89 mg/d. CONCLUSION(S) Dietary soy intake was positively related to the probability of having a live birth during infertility treatment with ART.
Collapse
Affiliation(s)
- Jose C Vanegas
- School of Medicine, Pontificia Universidad Javeriana, Bogota, Colombia
| | - Myriam C Afeiche
- Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts
| | - Audrey J Gaskins
- Department of Nutrition, Harvard School of Public Health, Boston, Massachusetts; Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts
| | - Lidia Mínguez-Alarcón
- Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts
| | - Paige L Williams
- Department of Biostatistics, Harvard School of Public Health, Boston, Massachusetts
| | - Diane L Wright
- Vincent Obstetrics and Gynecology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - Thomas L Toth
- Vincent Obstetrics and Gynecology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - Russ Hauser
- Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts; Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts; Vincent Obstetrics and Gynecology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - Jorge E Chavarro
- Department of Nutrition, Harvard School of Public Health, Boston, Massachusetts; Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts; Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.
| |
Collapse
|
32
|
Zamora-Ros R, Touillaud M, Rothwell JA, Romieu I, Scalbert A. Measuring exposure to the polyphenol metabolome in observational epidemiologic studies: current tools and applications and their limits. Am J Clin Nutr 2014; 100:11-26. [PMID: 24787490 PMCID: PMC4144095 DOI: 10.3945/ajcn.113.077743] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 03/25/2014] [Indexed: 12/13/2022] Open
Abstract
Much experimental evidence supports a protective role of dietary polyphenols against chronic diseases such as cardiovascular diseases, diabetes, and cancer. However, results from observational epidemiologic studies are still limited and are often inconsistent. This is largely explained by the difficulties encountered in the estimation of exposure to the polyphenol metabolome, which is composed of ~500 polyphenols distributed across a wide variety of foods and characterized by diverse biological properties. Exposure to the polyphenol metabolome in epidemiologic studies can be assessed by the use of detailed dietary questionnaires or the measurement of biomarkers of polyphenol intake. The questionnaire approach has been greatly facilitated by the use of new databases on polyphenol composition but is limited by bias as a result of self-reporting. The use of polyphenol biomarkers holds much promise for objective estimation of polyphenol exposure in future metabolome-wide association studies. These approaches are reviewed and their advantages and limitations discussed by using examples of epidemiologic studies on polyphenols and cancer. The current improvement in these techniques, along with greater emphasis on the intake of individual polyphenols rather than polyphenols considered collectively, will help unravel the role of these major food bioactive constituents in disease prevention.
Collapse
Affiliation(s)
- Raul Zamora-Ros
- From the Section of Nutrition and Metabolism, International Agency for Research on Cancer, Lyon, France (RZ-R, JAR, IR, and AS); the Unit of Nutrition, Environment, and Cancer, Catalan Institute of Oncology, Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Spain (RZ-R); and the Cancer and Environment Unit, Centre Léon Bérard, Lyon, France (MT)
| | - Marina Touillaud
- From the Section of Nutrition and Metabolism, International Agency for Research on Cancer, Lyon, France (RZ-R, JAR, IR, and AS); the Unit of Nutrition, Environment, and Cancer, Catalan Institute of Oncology, Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Spain (RZ-R); and the Cancer and Environment Unit, Centre Léon Bérard, Lyon, France (MT)
| | - Joseph A Rothwell
- From the Section of Nutrition and Metabolism, International Agency for Research on Cancer, Lyon, France (RZ-R, JAR, IR, and AS); the Unit of Nutrition, Environment, and Cancer, Catalan Institute of Oncology, Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Spain (RZ-R); and the Cancer and Environment Unit, Centre Léon Bérard, Lyon, France (MT)
| | - Isabelle Romieu
- From the Section of Nutrition and Metabolism, International Agency for Research on Cancer, Lyon, France (RZ-R, JAR, IR, and AS); the Unit of Nutrition, Environment, and Cancer, Catalan Institute of Oncology, Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Spain (RZ-R); and the Cancer and Environment Unit, Centre Léon Bérard, Lyon, France (MT)
| | - Augustin Scalbert
- From the Section of Nutrition and Metabolism, International Agency for Research on Cancer, Lyon, France (RZ-R, JAR, IR, and AS); the Unit of Nutrition, Environment, and Cancer, Catalan Institute of Oncology, Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Spain (RZ-R); and the Cancer and Environment Unit, Centre Léon Bérard, Lyon, France (MT)
| |
Collapse
|
33
|
Shi L, Ryan HH, Jones E, Moore Simas TA, Lichtenstein AH, Sun Q, Hayman LL. Urinary isoflavone concentrations are inversely associated with cardiometabolic risk markers in pregnant U.S. women. J Nutr 2014; 144:344-51. [PMID: 24381220 PMCID: PMC4083231 DOI: 10.3945/jn.113.184069] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Some evidence suggests that phytoestrogens, such as soy-derived isoflavones, may have beneficial effects on cardiovascular health and glycemic control. These data are mainly limited to postmenopausal women or individuals at elevated cardiometabolic risk. There is a lack of data for pregnant women who have elevated estrogen levels and physiologically altered glucose and lipid metabolism. We analyzed data from 299 pregnant women who participated in the NHANES 2001-2008 surveys. Multivariable linear regression analyses were used to examine the association between urinary concentrations of isoflavonoids and cardiometabolic risk markers, adjusted for body mass index, pregnancy trimester, total energy intake, dietary intake of protein, fiber, and cholesterol, and demographic and lifestyle factors. Cardiometabolic risk markers were log-transformed, and geometric means were calculated by quartiles of urinary concentrations of isoflavonoids. Comparing women in the highest vs. lowest quartiles of urine total isoflavone concentrations, we observed significant, inverse associations with circulating concentrations of fasting glucose (79 vs. 88 mg/dL, P-trend = 0.0009), insulin (8.2 vs. 12.8 μU/mL, P-trend = 0.03), and triglyceride (156 vs. 185 mg/dL, P-trend = 0.02), and the homeostasis model assessment of insulin resistance (1.6 vs. 2.8, P-trend = 0.01), but not for total, low-density lipoprotein cholesterol and high-density lipoprotein cholesterol. The concentrations of individual isoflavonoids, daidzein, equol, and O-desmethylangolensin were inversely associated with some cardiometabolic risk markers, although no clear pattern emerged. These data suggest that there may be a relation between isoflavone intake and cardiometabolic risk markers in pregnant women.
Collapse
Affiliation(s)
- Ling Shi
- Department of Nursing, University of Massachusetts, Boston, MA,To whom correspondence should be addressed. E-mail:
| | | | - Emily Jones
- Department of Nursing, University of Massachusetts, Boston, MA
| | - Tiffany A. Moore Simas
- Department of Obstetrics and Gynecology, University of Massachusetts Medical School, Worcester, MA
| | - Alice H. Lichtenstein
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA
| | - Qi Sun
- Channing Division of Network Medicine, Department of Medicine, Harvard School of Medicine, Boston, MA; and,Department of Nutrition, Harvard School of Public Health, Boston, MA
| | - Laura L. Hayman
- Department of Nursing, University of Massachusetts, Boston, MA
| |
Collapse
|
34
|
The association between urinary phytoestrogen excretion and components of the metabolic syndrome in NHANES. Eur J Nutr 2013; 53:1371-81. [DOI: 10.1007/s00394-013-0639-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Accepted: 12/06/2013] [Indexed: 11/25/2022]
|
35
|
Li R, Zhao F, Diao H, Xiao S, Ye X. Postweaning dietary genistein exposure advances puberty without significantly affecting early pregnancy in C57BL/6J female mice. Reprod Toxicol 2013; 44:85-92. [PMID: 24365114 DOI: 10.1016/j.reprotox.2013.12.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2013] [Revised: 12/12/2013] [Accepted: 12/12/2013] [Indexed: 01/06/2023]
Abstract
An epidemiological study indicates higher plasma level of genistein in girls with earlier puberty. This study tests the hypothesis in C57BL/6J mice that postweaning (peripubertal) dietary genistein exposure could result in earlier puberty in females assessed by vaginal opening, estrous cyclicity, corpus luteum and mammary gland development. Newly weaned female mice were fed with 0, 5, 100, or 500 ppm genistein diets. Decreased age at vaginal opening, increased length on estrus stage, and accelerated mammary gland development were detected in 100 and 500 ppm genistein-treated groups. Increased presence of corpus luteum was found in 5 ppm genistein-treated group at 6 weeks old only. Increased expression of epithelial-specific genes but not that of ERα or ERβ was detected in 500 ppm genistein-treated mammary glands at 5 weeks old. No significant adverse effect on embryo implantation was observed. These data demonstrate causal effect of dietary genistein on earlier puberty in female mice.
Collapse
Affiliation(s)
- Rong Li
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA; Interdisciplinary Toxicology Program, University of Georgia, Athens, GA 30602, USA.
| | - Fei Zhao
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA; Interdisciplinary Toxicology Program, University of Georgia, Athens, GA 30602, USA.
| | - Honglu Diao
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA.
| | - Shuo Xiao
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA; Interdisciplinary Toxicology Program, University of Georgia, Athens, GA 30602, USA.
| | - Xiaoqin Ye
- Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA; Interdisciplinary Toxicology Program, University of Georgia, Athens, GA 30602, USA.
| |
Collapse
|
36
|
Dietary phyto-oestrogens and the risk of ovarian and endometrial cancers: findings from two Australian case-control studies. Br J Nutr 2013; 111:1430-40. [PMID: 24331201 DOI: 10.1017/s0007114513003899] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Phyto-oestrogens have been suggested to have a protective effect on hormone-sensitive cancers. However, few studies have investigated the association between dietary phyto-oestrogens and gynaecological cancers. In the present study, we analysed data from two population-based case-control studies of ovarian (1366 cases and 1414 controls) and endometrial (1288 cases and 1435 controls) cancers. Dietary intake information was obtained using a 135-item FFQ, and phyto-oestrogen intake was estimated using published food composition databases. Unconditional logistic regression was used to estimate adjusted OR and 95% CI. In multivariable analyses, there was a suggestive pattern of inverse associations between increasing intakes of total phyto-oestrogens, isoflavones and enterolignans and the risk of ovarian cancer. However, the results only reached statistical significance for the lignan compounds matairesinol and lariciresinol, where the OR for the highest v. the lowest intake category was 0.72 (95% CI 0.54, 0.96; P for trend = 0.02) for matairesinol and 0.72 (95% CI 0.55, 0.96; P for trend = 0.03) for lariciresinol. When the risk of ovarian cancer was assessed by subtype, there was an indication that increasing intakes of phyto-oestrogens may be associated with a decreased risk of mucinous (cases n 158) ovarian tumours (OR for the highest v. the lowest intake category: 0.47 (95% CI 0.24, 0.93); P for trend = 0.04). However, there were no significant associations with other histological subtypes. In contrast, dietary phyto-oestrogens (total or any subclass) were unrelated to the risk of endometrial cancer cases overall or by subtype.
Collapse
|
37
|
Jacques PF, Cassidy A, Rogers G, Peterson JJ, Meigs JB, Dwyer JT. Higher dietary flavonol intake is associated with lower incidence of type 2 diabetes. J Nutr 2013; 143:1474-80. [PMID: 23902957 PMCID: PMC3743276 DOI: 10.3945/jn.113.177212] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Substantial experimental evidence suggests that several flavonoid classes are involved in glucose metabolism, but few clinical or epidemiologic studies exist that provide supporting human evidence for this relationship. The objective of this study was to determine if habitual intakes of specific flavonoid classes are related to incidence of type 2 diabetes (T2D). We followed 2915 members of the Framingham Offspring cohort who were free of T2D at baseline from 1991 to 2008. Diabetes was defined by either elevated fasting glucose (≥7.0 mmol/L) or initiation of hypoglycemic medication during follow-up. Dietary intakes of 6 flavonoid classes and total flavonoids were assessed using a validated, semiquantitative food frequency questionnaire. We observed 308 incident cases of T2D during a mean follow-up period of 11.9 y (range 2.5-16.8 y). After multivariable adjusted, time-dependent analyses, which accounted for long-term flavonoid intake during follow-up, each 2.5-fold increase in flavonol intake was associated with a 26% lower incidence of T2D [HR = 0.74 (95% CI: 0.61, 0.90); P-trend = 0.003] and each 2.5-fold increase in flavan-3-ol intake was marginally associated with an 11% lower incidence of T2D [HR = 0.89 (95% CI: 0.80, 1.00); P-trend = 0.06]. No other associations between flavonoid classes and risk of T2D were observed. Our observations support previous experimental evidence of a possible beneficial relationship between increased flavonol intake and risk of T2D.
Collapse
Affiliation(s)
- Paul F. Jacques
- Jean Mayer USDA Human Nutrition Research Center on Aging, and,Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA,To whom correspondence should be addressed. E-mail:
| | - Aedin Cassidy
- Department of Nutrition, Norwich Medical School, University of East Anglia, Norwich, UK
| | - Gail Rogers
- Jean Mayer USDA Human Nutrition Research Center on Aging, and
| | - Julia J. Peterson
- Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA
| | - James B. Meigs
- General Medicine Division, Massachusetts General Hospital, Boston, MA; and,Department of Medicine, Harvard Medical School, Boston, MA
| | - Johanna T. Dwyer
- Jean Mayer USDA Human Nutrition Research Center on Aging, and,Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA
| |
Collapse
|
38
|
Filiberto AC, Mumford SL, Pollack AZ, Zhang C, Yeung EH, Schliep KC, Perkins NJ, Wactawski-Wende J, Schisterman EF. Usual dietary isoflavone intake and reproductive function across the menstrual cycle. Fertil Steril 2013; 100:1727-34. [PMID: 23998910 DOI: 10.1016/j.fertnstert.2013.08.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Revised: 08/02/2013] [Accepted: 08/02/2013] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To assess the association of total isoflavone intake with ovulatory function, including sporadic anovulation in healthy premenopausal women. DESIGN Prospective cohort study. SETTING University. PATIENT(S) Participants included 259 healthy regularly menstruating women aged 18-44 years. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) Serum concentrations of E2, free E2, P, LH, FSH, and SHBG and sporadic anovulation in healthy premenopausal women. RESULT(S) Isoflavone intake was not associated with E2, free E2, P, LH, and FSH concentrations. Consumption in the highest quartile (Q4: 1.6-78.8 mg/d) was significantly associated with greater SHBG concentrations (β = 0.09; 95% confidence interval [CI] 0.02-0.16), compared with the first quartile (Q1: 0.0-0.3 mg/d). CONCLUSION(S) Isoflavone intake was not associated with sporadic anovulation (Q4 vs. Q1: odds ratio 0.87, 95% CI 0.32-1.66). Dietary isoflavone intake among young premenopausal women was not related to sex hormone concentrations or anovulation, but was associated with minimally increased SHBG concentrations. These results suggest potential endocrine effects with no subsequent effects on ovulation, easing concerns regarding their impacts on fertility.
Collapse
Affiliation(s)
- Amanda C Filiberto
- Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Rockville, Maryland
| | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Rybak ME, Sternberg MR, Pfeiffer CM. Sociodemographic and lifestyle variables are compound- and class-specific correlates of urine phytoestrogen concentrations in the U.S. population. J Nutr 2013; 143:986S-94S. [PMID: 23596167 PMCID: PMC4804190 DOI: 10.3945/jn.112.172981] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Isoflavones and lignans are plant-derived dietary compounds generally believed to be beneficial to human health. We investigated the extent to which sociodemographic (age, sex, race-ethnicity, education, and income) and lifestyle variables (smoking, alcohol consumption, BMI, physical activity, and dietary supplement use) were correlates of spot urine concentration for daidzein, genistein, O-desmethylangolensin (DMA), equol, enterodiol, and enterolactone in the U.S. population aged ≥ 20 y (NHANES 2003-2006). We performed correlation analyses with continuous variables and calculated stratified unadjusted geometric means for each sociodemographic and lifestyle variable. We used bivariate significance testing and covariate adjustment by use of multiple regression models to identify influential variables and used β coefficients to estimate relative effects. Urine creatinine was also included in our analyses because of its use in correcting for variable dilution in spot urine samples. We observed many significant (P < 0.05) associations with the sociodemographic and lifestyle variables that withstood covariate adjustment. Smoking was a significant correlate of urine DMA and enterolactone, with concentrations at least 25% lower in smokers vs. nonsmokers. Consumers of 1 daily alcoholic drink vs. none were estimated to have 18-21% lower urine equol and DMA concentrations. A 25% increase in BMI was associated with a 21% lower urine enterolactone concentration, and increasing physical activity was associated with a >6% higher urine enterolactone concentration. Dietary supplement use was not significantly associated with any of the urine phytoestrogens. Overall, we found that relationships between sociodemographic and lifestyle variables and urine phytoestrogen concentration were highly compound and class specific.
Collapse
Affiliation(s)
- Michael E. Rybak
- National Center for Environmental Health, US Centers for Disease Control and Prevention (CDC), Atlanta, GA, USA
| | - Maya R. Sternberg
- National Center for Environmental Health, US Centers for Disease Control and Prevention (CDC), Atlanta, GA, USA
| | - Christine M. Pfeiffer
- National Center for Environmental Health, US Centers for Disease Control and Prevention (CDC), Atlanta, GA, USA,Corresponding author: Christine M. Pfeiffer, Division of Laboratory Sciences, National Center for Environmental Health, US Centers for Disease Control and Prevention, 4770 Buford Hwy, MS F-55 Atlanta, GA, USA 30341.
| |
Collapse
|
40
|
Filiberto AC, Mumford SL, Pollack AZ, Zhang C, Yeung EH, Perkins NJ, Wactawski-Wende J, Schisterman EF. Habitual dietary isoflavone intake is associated with decreased C-reactive protein concentrations among healthy premenopausal women. J Nutr 2013; 143:900-6. [PMID: 23616515 PMCID: PMC3652886 DOI: 10.3945/jn.112.173187] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Isoflavones have been associated with lower cardiovascular disease risk, but existing research focused on very high isoflavone intakes, as seen in Asian populations, as well as on risk factor reductions primarily in postmenopausal women. We investigated whether habitual low isoflavone intake among premenopausal women was associated with serum C-reactive protein (CRP) concentration, a commonly used biomarker associated with prediction of cardiovascular disease risk in healthy women. Between 2005 and 2007, 259 healthy, regularly menstruating women were enrolled in the BioCycle Study, and followed for up to 2 menstrual cycles. CRP was measured in serum at up to 16 clinic visits, timed to phases of the women's menstrual cycle. Diet was assessed up to 4 times per cycle by using 24-h recalls. Marginal structural models with inverse probability of exposure weights estimated the association between CRP and quartiles of isoflavone intake adjusted for age, race, BMI, cycle phase, total energy intake, total fiber, total whole grains, and phase-specific hormone concentrations including estradiol, progesterone, luteinizing hormone, and follicle-stimulating hormone. Compared with the lowest quartile of total isoflavone intake, women in the highest quartile had, on average, 27% lower serum CRP concentrations (95% CI: -35, -21%). Our results suggest that dietary isoflavone intakes at levels characteristic of the U.S. population are associated with decreased serum CRP concentrations, a factor associated with beneficial effects on inflammation, and subsequently may have the potential to improve health status among young women.
Collapse
Affiliation(s)
- Amanda C. Filiberto
- Division of Epidemiology, Statistics, and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Rockville, MD; and
| | - Sunni L. Mumford
- Division of Epidemiology, Statistics, and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Rockville, MD; and
| | - Anna Z. Pollack
- Department of Social and Preventive Medicine, University at Buffalo, State University of New York, Buffalo, NY
| | - Cuilin Zhang
- Division of Epidemiology, Statistics, and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Rockville, MD; and
| | - Edwina H. Yeung
- Division of Epidemiology, Statistics, and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Rockville, MD; and
| | - Neil J. Perkins
- Division of Epidemiology, Statistics, and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Rockville, MD; and
| | - Jean Wactawski-Wende
- Department of Social and Preventive Medicine, University at Buffalo, State University of New York, Buffalo, NY
| | - Enrique F. Schisterman
- Division of Epidemiology, Statistics, and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Rockville, MD; and
| |
Collapse
|
41
|
Nieves JW. Skeletal effects of nutrients and nutraceuticals, beyond calcium and vitamin D. Osteoporos Int 2013; 24:771-86. [PMID: 23152094 DOI: 10.1007/s00198-012-2214-4] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Accepted: 10/01/2012] [Indexed: 12/23/2022]
Abstract
There is a need to understand the role of nutrition, beyond calcium and vitamin D, in the treatment and prevention of osteoporosis in adults. Results regarding soy compounds on bone density and bone turnover are inconclusive perhaps due to differences in dose and composition or in study population characteristics. The skeletal benefit of black cohosh and red clover are unknown. Dehydroepiandrosterone (DHEA) use may benefit elderly individuals with low serum dehydroepiandrosterone-sulfate levels, but even in this group, there are inconsistent benefits to bone density (BMD). Higher fruit and vegetable intakes may relate to higher BMD. The skeletal benefit of flavonoids, carotenoids, omega-3-fatty acids, and vitamins A, C, E and K are limited to observational data or a few clinical trials, in some cases investigating pharmacologic doses. Given limited data, it would be better to get these nutrients from fruits and vegetables. Potassium bicarbonate may improve calcium homeostasis but with little impact on bone loss. High homocysteine may relate to fracture risk, but the skeletal benefit of each B vitamin is unclear. Magnesium supplementation is likely only required in persons with low magnesium levels. Data are very limited for the role of nutritional levels of boron, strontium, silicon and phosphorus in bone health. A nutrient rich diet with adequate fruits and vegetables will generally meet skeletal needs in healthy individuals. For most healthy adults, supplementation with nutrients other than calcium and vitamin D may not be required, except in those with chronic disease and the frail elderly.
Collapse
Affiliation(s)
- J W Nieves
- Department of Epidemiology, Mailman School of Public Health, Columbia University, 722 West 168th Street, New York, NY 10032, USA.
| |
Collapse
|
42
|
Höjer A, Adler S, Purup S, Hansen-Møller J, Martinsson K, Steinshamn H, Gustavsson AM. Effects of feeding dairy cows different legume-grass silages on milk phytoestrogen concentration. J Dairy Sci 2012; 95:4526-40. [PMID: 22818467 DOI: 10.3168/jds.2011-5226] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Accepted: 04/07/2012] [Indexed: 01/26/2023]
Abstract
Phytoestrogens are hormone-like substances in plants that can substantially influence human health (positively or negatively), and when fed to dairy cows are partly transferred to their milk. The aim of this study was to investigate the effects of varying the botanical composition and regrowth interval of legume-grass silage on phytoestrogen intake and milk phytoestrogen concentrations. In one experiment, 15 Swedish Red dairy cows were fed 2- or 3-cut red clover-grass silage, or 2-cut birdsfoot trefoil-grass silage. In a second experiment, 16 Norwegian Red dairy cows were fed short-term ley silage with red clover or long-term ley silage with white clover, and the effects of supplementation with α-tocopherol were also tested. High concentrations of formononetin and biochanin A were found in all silage mixtures with red clover. The milk concentration of equol was highest for cows on the 2-cut red clover-grass silage diet (1,494 μg/kg of milk). Because of the metabolism of biochanin A, genistein, and prunetin, their concentrations in milk and the apparent recovery were low. Coumestrol was detected in only short-term and long-term ley silage mixtures, and its milk concentration was low. Concentrations of secoisolariciresinol and matairesinol were higher in 2-cut birdsfoot trefoil-grass and long-term ley silage mixtures, those with legume species other than red clover, and the highest grass proportions. The 2-cut birdsfoot trefoil-grass silage diet also resulted in higher enterolactone concentration than the other diets (226 μg/kg of milk). Lengthening the regrowth interval increased the intake of secoisolariciresinol and decreased the recovery of lignans. Feeding long-term ley silage resulted in higher milk lignan concentrations but lower milk isoflavone concentrations than feeding short-term ley silage. The apparent recovery of all phytoestrogens except prunetin was highest on the 2-cut birdsfoot trefoil-grass silage diet. No effect of α-tocopherol supplementation was observed on milk concentrations of any of the measured phytoestrogens. Variations were observed in milk concentrations of phytoestrogens, especially of equol, among cows, which could not be explained by variations in diet composition or phytoestrogen intake. The results show that milk phytoestrogen concentration is strongly influenced by silage botanical composition, but questions regarding phytoestrogen metabolism remain to be answered.
Collapse
Affiliation(s)
- A Höjer
- Swedish University of Agricultural Sciences, Department of Agricultural Research for Northern Sweden, SE-901 83 Umeå, Sweden.
| | | | | | | | | | | | | |
Collapse
|
43
|
Chun OK, Lee SG, Wang Y, Vance T, Song WO. Estimated flavonoid intake of the elderly in the United States and around the world. J Nutr Gerontol Geriatr 2012; 31:190-205. [PMID: 22888838 DOI: 10.1080/21551197.2012.702530] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The aging population has been growing fast in the United States and worldwide. The morbidity of age-related chronic degenerative diseases has also been increasing in parallel. Numerous studies have reported that consumption of flavonoid-rich fruits and vegetables is inversely associated with such chronic diseases as Alzheimer's disease, age-related macular degeneration, cardiovascular disease, and osteoporosis. In establishing flavonoids as one of the contributors to the protective effects, the very first step is to estimate flavonoid intake from various dietary sources. Estimation of flavonoid intake from dietary sources has been feasible since 2003 when the U.S. Department of Agriculture (USDA) released the database for the flavonoid content of selected foods. Since then, several articles have been published in which flavonoid intake in various subpopulation groups was estimated from relatively large, current databases of flavonoid concentration data. However, information is still limited on the intake by seniors in the United States and worldwide. This review summarizes the most current estimates of flavonoid intake by seniors in the United States and elsewhere.
Collapse
Affiliation(s)
- Ock K Chun
- Department of Nutritional Sciences, University of Connecticut, Storrs, Connecticut, USA
| | | | | | | | | |
Collapse
|
44
|
Lowry SJ, Sprague BL, Bowles EJA, Hedman CJ, Hemming J, Hampton JM, Burnside ES, Sisney GA, Buist DS, Trentham-Dietz A. Mammographic breast density and serum phytoestrogen levels. Nutr Cancer 2012; 64:783-9. [PMID: 22860715 PMCID: PMC4055295 DOI: 10.1080/01635581.2012.707279] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Some forms of estrogen are associated with breast cancer risk as well as with mammographic density (MD), a strong marker of breast cancer risk. Whether phytoestrogen intake affects breast density, however, remains unclear. We evaluated the association between serum levels of phytoestrogens and MD in postmenopausal women. We enrolled 269 women, ages 55-70 yr, who received a screening mammogram and had no history of postmenopausal hormone use. Subjects completed a survey on diet and factors related to MD and provided a blood sample for analysis of 3 phytoestrogens: genistein, daidzein, and coumestrol. We examined whether mean percent MD was related to serum level of phytoestrogens, adjusting for age and body mass index. Genistein and daidzein levels correlated with self-reported soy consumption. Mean percent MD did not differ across women with different phytoestrogen levels. For example, women with nondetectable genistein levels had mean density of 11.0% [95% confidence intervals (CI) = 9.9-12.4], compared to 10.5% (95% CI = 8.0-13.7) and 11.2% (95% CI = 8.7-14.6) for < and ≥ median detectable levels, respectively. In a population with relatively low soy intake, serum phytoestrogens were not associated with mammographic density. Additional studies are needed to determine effects of higher levels, particularly given patterns of increasing phytoestrogen intake.
Collapse
Affiliation(s)
- Sarah J. Lowry
- Group Health Research Institute
- Department of Epidemiology, University of Washington
| | | | | | | | | | | | - Elizabeth S. Burnside
- University of Wisconsin Carbone Cancer Center
- Department of Radiology, University of Wisconsin
| | | | | | - Amy Trentham-Dietz
- University of Wisconsin Carbone Cancer Center
- Department of Population Health Sciences, University of Wisconsin
| |
Collapse
|
45
|
Nechuta SJ, Caan BJ, Chen WY, Lu W, Chen Z, Kwan ML, Flatt SW, Zheng Y, Zheng W, Pierce JP, Shu XO. Soy food intake after diagnosis of breast cancer and survival: an in-depth analysis of combined evidence from cohort studies of US and Chinese women. Am J Clin Nutr 2012; 96:123-32. [PMID: 22648714 PMCID: PMC3374736 DOI: 10.3945/ajcn.112.035972] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Soy isoflavones have antiestrogenic and anticancer properties but also possess estrogen-like properties, which has raised concern about soy food consumption among breast cancer survivors. OBJECTIVE We prospectively evaluated the association between postdiagnosis soy food consumption and breast cancer outcomes among US and Chinese women by using data from the After Breast Cancer Pooling Project. DESIGN The analysis included 9514 breast cancer survivors with a diagnosis of invasive breast cancer between 1991 and 2006 from 2 US cohorts and 1 Chinese cohort. Soy isoflavone intake (mg/d) was measured with validated food-frequency questionnaires. HRs and 95% CIs were estimated by using delayed-entry Cox regression models, adjusted for sociodemographic, clinical, and lifestyle factors. RESULTS After a mean follow-up of 7.4 y, we identified 1171 total deaths (881 from breast cancer) and 1348 recurrences. Despite large differences in soy isoflavone intake by country, isoflavone consumption was inversely associated with recurrence among both US and Chinese women, regardless of whether data were analyzed separately by country or combined. No heterogeneity was observed. In the pooled analysis, consumption of ≥10 mg isoflavones/d was associated with a nonsignificant reduced risk of all-cause (HR: 0.87; 95% CI: 0.70, 1.10) and breast cancer-specific (HR: 0.83; 95% CI: 0.64, 1.07) mortality and a statistically significant reduced risk of recurrence (HR: 0.75; 95% CI: 0.61, 0.92). CONCLUSION In this large study of combined data on US and Chinese women, postdiagnosis soy food consumption of ≥10 mg isoflavones/d was associated with a nonsignificant reduced risk of breast cancer-specific mortality and a statistically significant reduced risk of recurrence.
Collapse
Affiliation(s)
- Sarah J Nechuta
- Division of Epidemiology, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
46
|
Franke AA, Lai JF, Pagano I, Morimoto Y, Maskarinec G. Equol production changes over time in pre-menopausal women. Br J Nutr 2012; 107:1201-6. [PMID: 21920062 PMCID: PMC3319310 DOI: 10.1017/s0007114511004223] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Equol (EQ) is a metabolite produced by gut bacteria through the chemical reduction of the soya isoflavone daidzein (DE), but only by 30-60% of the population. EQ is believed to provide benefits derived from soya intake and its production is widely viewed as a relatively stable phenomenon. In a randomised, cross-over intervention with soya foods, seventy-nine pre-menopausal women were challenged with a high-soya and a low-soya diet each for 6 months, separated by a 1-month washout period. Overnight urine was collected at three time points during each diet period and analysed for DE and EQ by liquid chromatography tandem MS. Remaining an EQ producer (EP) or non-producer (NP) or changing towards an EP or NP was assessed using an EQ:DE ratio of ≥0·018 combined with a DE threshold of ≥2 nmol/mg creatinine as a cut-off point. We observed 19 and 24% EP during the low-soya and high-soya diet periods, respectively, and found that 6-11% of our subjects changed EQ status 'within' each study period (on an average of 1·2 times), while 16% changed 'between' the two diet periods. The present finding challenges the widely held conviction that EQ production within an individual remains stable over time. The precise factors contributing to changes in EQ status, however, remain elusive and warrant further investigation.
Collapse
Affiliation(s)
- Adrian A Franke
- University of Hawaii Cancer Center, Clinical Sciences Program, 1236 Lauhala Street, Honolulu, HI 96813, USA.
| | | | | | | | | |
Collapse
|
47
|
Ollberding NJ, Lim U, Wilkens LR, Setiawan VW, Shvetsov YB, Henderson BE, Kolonel LN, Goodman MT. Legume, soy, tofu, and isoflavone intake and endometrial cancer risk in postmenopausal women in the multiethnic cohort study. J Natl Cancer Inst 2012; 104:67-76. [PMID: 22158125 PMCID: PMC3250383 DOI: 10.1093/jnci/djr475] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Revised: 10/11/2011] [Accepted: 10/17/2011] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Phytochemicals found in soy and other legumes have been speculated to reduce the risk of endometrial cancer; however, inconsistent findings have been reported in the few epidemiological studies conducted to date. METHODS We conducted a prospective analysis of 46 027 nonhysterectomized postmenopausal women who were recruited into the Multiethnic Cohort (MEC) Study between August 1993 and August 1996 and provided detailed baseline information on diet and other endometrial cancer risk factors. A total of 489 women diagnosed with incident endometrial cancer were identified through the Surveillance, Epidemiology, and End Results tumor registry linkages during a median follow-up period of 13.6 years. Cox proportional hazards models were used to estimate multivariable-adjusted relative risks (RRs) and 95% confidence intervals (CIs) for endometrial cancer associated with dietary intake of legumes, soy, and tofu, and for total isoflavones and specific isoflavones (daidzein, genistein, or glycitein). Truncated (age 50-89 years) age-adjusted incidence rates were calculated by applying age-specific rates within isoflavone quintiles to the overall MEC population eligible for endometrial cancer. To estimate the percentage of endometrial cancers that may have been prevented by consuming the highest quintile of total isoflavones, the partial population attributable risk percent was calculated. RESULTS A reduced risk of endometrial cancer was associated with total isoflavone intake (highest vs lowest quintile, ≥7.82 vs <1.59 mg per 1000 kcal/d, RR = 0.66, 95% CI = 0.47 to 0.91), daidzein intake (highest vs lowest quintile, ≥3.54 vs <0.70 mg per 1000 kcal/d, RR = 0.64, 95% CI = 0.46 to 0.90), and genistein intake (highest vs lowest quintile, ≥3.40 vs <0.69 mg per 1000 kcal/d, RR = 0.66, 95% CI = 0.47 to 0.91). No statistically significant association with endometrial cancer risk was observed for increasing intake of legumes, soy, tofu, or glycitein. Truncated age-adjusted incidence rates of endometrial cancer for the highest vs lowest quintile of total isoflavone intake were 55 vs 107 per 100 000 women per year, respectively. The partial population attributable risk percent for total isoflavone intake lower than the highest quintile was 26.7% (95% CI = 5.3% to 45.8%). CONCLUSION This study suggests that greater consumption of isoflavone-containing foods is associated with a reduced risk of endometrial cancer in this population of nonhysterectomized postmenopausal women.
Collapse
|
48
|
Frankenfeld CL. Dairy consumption is a significant correlate of urinary equol concentration in a representative sample of US adults. Am J Clin Nutr 2011; 93:1109-16. [PMID: 21389178 DOI: 10.3945/ajcn.111.011825] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Equol and O-desmethylangolensin (ODMA) are products of gut bacterial metabolism of daidzein, a phytochemical found predominantly in soy. Dietary sources of equol from animal products have been identified, which has raised the question of the relative contributions of daidzein intake and gut metabolism to equol and of equol intake from animal products in low-soy-consuming populations. OBJECTIVE The objective was to evaluate the contribution of dietary food groups to urinary isoflavone and daidzein metabolite concentrations in a representative sample of US adults. DESIGN A cross-sectional analysis of dietary and urinary isoflavonoid data from 3115 individuals in the 2001-2002 and 2003-2004 data cycles of the National Nutrition and Health Examination Survey (NHANES) was conducted. RESULTS Daidzein intake and consumption frequency of grain products and legumes, nuts, and seeds were significant correlates of daidzein, genistein, and ODMA concentrations; and soy legumes were a stronger correlate than were nonsoy legumes. Milk and milk product consumption and daidzein intake, but not legumes, were significant correlates of urinary equol concentrations; milk products were more strongly correlated (P for trend < 0.001) than was daidzein intake (P = 0.011). CONCLUSIONS These results suggest that dietary daidzein and legumes may contribute to urinary daidzein, genistein, and ODMA concentrations in this low-soy-consuming population. These results also suggest that equol concentrations in low-soy-consuming populations may reflect equol intakes from mammalian milk sources and may not reflect the endogenous production of equol from the microbial metabolism of daidzein-an observation not yet documented in the US population. These results support the careful design and interpretation of urinary isoflavonoid excretion studies, particularly bacterial metabolites, in low-soy-consuming populations.
Collapse
Affiliation(s)
- Cara L Frankenfeld
- Department of Global and Community Health, George Mason University, Fairfax, VA 22030, USA.
| |
Collapse
|
49
|
Isoflavones and PPAR Signaling: A Critical Target in Cardiovascular, Metastatic, and Metabolic Disease. PPAR Res 2011; 2010:153252. [PMID: 21461045 PMCID: PMC3061262 DOI: 10.1155/2010/153252] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Accepted: 12/17/2010] [Indexed: 11/18/2022] Open
Abstract
Isoflavone intake through foods and dietary supplements has both health advocates and critics. The latter come from a concern about the estrogenic effects of isoflavones in certain species. However, careful removal of isoflavones and other estrogens from the diet of rodents leads to the metabolic syndrome. These results suggest that isoflavones have other mechanisms of action, potentially those involving regulation of fatty acid metabolism via the nuclear receptors PPARα and PPARγ. The goal of this paper was to examine the evidence for isoflavone/PPAR signaling and to identify diseases in which such signaling would have an important impact. It is therefore of note that investigators using a chemical structure approach to discover PPAR ligands identified isoflavones as the best structures in the library of compounds that they tested. Future studies will involve careful identification of the underlying mechanisms whereby isoflavones have their action via PPAR signaling.
Collapse
|
50
|
Patisaul HB, Jefferson W. The pros and cons of phytoestrogens. Front Neuroendocrinol 2010; 31:400-19. [PMID: 20347861 PMCID: PMC3074428 DOI: 10.1016/j.yfrne.2010.03.003] [Citation(s) in RCA: 418] [Impact Index Per Article: 29.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2010] [Revised: 03/19/2010] [Accepted: 03/23/2010] [Indexed: 02/07/2023]
Abstract
Phytoestrogens are plant derived compounds found in a wide variety of foods, most notably soy. A litany of health benefits including a lowered risk of osteoporosis, heart disease, breast cancer, and menopausal symptoms, are frequently attributed to phytoestrogens but many are also considered endocrine disruptors, indicating that they have the potential to cause adverse health effects as well. Consequently, the question of whether or not phytoestrogens are beneficial or harmful to human health remains unresolved. The answer is likely complex and may depend on age, health status, and even the presence or absence of specific gut microflora. Clarity on this issue is needed because global consumption is rapidly increasing. Phytoestrogens are present in numerous dietary supplements and widely marketed as a natural alternative to estrogen replacement therapy. Soy infant formula now constitutes up to a third of the US market, and soy protein is now added to many processed foods. As weak estrogen agonists/antagonists with molecular and cellular properties similar to synthetic endocrine disruptors such as Bisphenol A (BPA), the phytoestrogens provide a useful model to comprehensively investigate the biological impact of endocrine disruptors in general. This review weighs the evidence for and against the purported health benefits and adverse effects of phytoestrogens.
Collapse
|