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Ramos-Garcia V, Ten-Doménech I, Moreno-Giménez A, Campos-Berga L, Parra-Llorca A, Gormaz M, Vento M, Karipidou M, Poulimeneas D, Mamalaki E, Bathrellou E, Kuligowski J. Joint Microbiota Activity and Dietary Assessment through Urinary Biomarkers by LC-MS/MS. Nutrients 2023; 15:nu15081894. [PMID: 37111113 PMCID: PMC10146414 DOI: 10.3390/nu15081894] [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: 03/13/2023] [Revised: 04/03/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023] Open
Abstract
Accurate dietary assessment in nutritional research is a huge challenge, but essential. Due to the subjective nature of self-reporting methods, the development of analytical methods for food intake and microbiota biomarkers determination is needed. This work presents an ultra-high performance liquid chromatography coupled to tandem mass spectrometry (UHPLC-MS/MS) method for the quantification and semi quantification of 20 and 201 food intake biomarkers (BFIs), respectively, as well as 7 microbiota biomarkers applied to 208 urine samples from lactating mothers (M) (N = 59). Dietary intake was assessed through a 24 h dietary recall (R24h). BFI analysis identified three distinct clusters among samples: samples from clusters 1 and 3 presented higher concentrations of most biomarkers than those from cluster 2, with dairy products and milk biomarkers being more concentrated in cluster 1, and seeds, garlic and onion in cluster 3. Significant correlations were observed between three BFIs (fruits, meat, and fish) and R24h data (r > 0.2, p-values < 0.01, Spearman correlation). Microbiota activity biomarkers were simultaneously evaluated and the subgroup patterns detected were compared to clusters from dietary assessment. These results evidence the feasibility, usefulness, and complementary nature of the determination of BFIs, R24h, and microbiota activity biomarkers in observational nutrition cohort studies.
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Affiliation(s)
- Victoria Ramos-Garcia
- Neonatal Research Unit, Health Research Institute Hospital La Fe, Avda Fernando Abril Martorell 106, 46026 Valencia, Spain
| | - Isabel Ten-Doménech
- Neonatal Research Unit, Health Research Institute Hospital La Fe, Avda Fernando Abril Martorell 106, 46026 Valencia, Spain
| | - Alba Moreno-Giménez
- Neonatal Research Unit, Health Research Institute Hospital La Fe, Avda Fernando Abril Martorell 106, 46026 Valencia, Spain
| | - Laura Campos-Berga
- Neonatal Research Unit, Health Research Institute Hospital La Fe, Avda Fernando Abril Martorell 106, 46026 Valencia, Spain
| | - Anna Parra-Llorca
- Neonatal Research Unit, Health Research Institute Hospital La Fe, Avda Fernando Abril Martorell 106, 46026 Valencia, Spain
| | - María Gormaz
- Division of Neonatology, University & Polytechnic Hospital La Fe, Avda Fernando Abril Martorell 106, 46026 Valencia, Spain
| | - Máximo Vento
- Neonatal Research Unit, Health Research Institute Hospital La Fe, Avda Fernando Abril Martorell 106, 46026 Valencia, Spain
- Division of Neonatology, University & Polytechnic Hospital La Fe, Avda Fernando Abril Martorell 106, 46026 Valencia, Spain
| | - Melina Karipidou
- Department of Nutrition and Dietetics, Harokopio University of Athens, El. Venizelou 70, 17676 Kallithea, Greece
| | - Dimitrios Poulimeneas
- Department of Nutrition and Dietetics, Harokopio University of Athens, El. Venizelou 70, 17676 Kallithea, Greece
| | - Eirini Mamalaki
- Department of Nutrition and Dietetics, Harokopio University of Athens, El. Venizelou 70, 17676 Kallithea, Greece
| | - Eirini Bathrellou
- Department of Nutrition and Dietetics, Harokopio University of Athens, El. Venizelou 70, 17676 Kallithea, Greece
| | - Julia Kuligowski
- Neonatal Research Unit, Health Research Institute Hospital La Fe, Avda Fernando Abril Martorell 106, 46026 Valencia, Spain
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Ottaviani JI, Schroeter H, Kuhnle GGC. Measuring the intake of dietary bioactives: Pitfalls and how to avoid them. Mol Aspects Med 2023; 89:101139. [PMID: 36031430 DOI: 10.1016/j.mam.2022.101139] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 08/12/2022] [Accepted: 08/17/2022] [Indexed: 02/04/2023]
Abstract
Bioactives are food constituents that, while not essential to human life, can affect health. Thus, there is increased interest in developing dietary recommendations for bioactives. Such recommendations require detailed information about the long-term association between habitual intake and health at population scale, and these can only be provided by large-scale observational studies. Nutritional epidemiology relies on the accurate estimation of intake, but currently used methods, commonly based on a 2-step process involving self-reports and food composition tables, are fraught with significant challenges and are unable to estimate the systemic presence of bioactives. Intake assessments based on nutritional biomarkers can provide an advanced alternative, but there are a number of pitfalls that need to be addressed in order to obtain reliable data on intake. Using flavan-3-ols as a case study, we highlight here key challenges and how they may be avoided. Taken together, we believe that the approaches outlined in this review can be applied to a wide range of food constituents, and doing so will improve assessments of the dietary intake of bioactives.
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Affiliation(s)
| | | | - Gunter G C Kuhnle
- Department of Food & Nutritional Sciences, University of Reading, Reading RG56 6DX, UK.
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Grisley ED, Huber KN, Knapp AN, Butteiger DN, Banz WJ, MacLean JA, Wallace DG, Cheatwood JL. Effects of Dietary Soy Protein Isolate Versus Isoflavones Alone on Poststroke Skilled Ladder Rung Walking and Cortical mRNA Expression Differ in Adult Male Rats. J Med Food 2022; 25:158-165. [PMID: 34936814 PMCID: PMC8867101 DOI: 10.1089/jmf.2020.0218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Dietary soy protein isolate (SPI) and the isoflavones daidzein and genistein have been shown to provide neuroprotection from stroke. However, the mechanisms remain uncertain. We sought to determine whether the addition of isoflavones to a diet containing caseinate (CAS) as the protein source would induce behavioral neuroprotection similar to that seen previously in rats fed SPI. Furthermore, we aimed to characterize the baseline and poststroke expression of mRNAs involved in pathways previously published as perhaps mediating soy-based neuroprotection from stroke and other markers of neuronal plasticity, oxidative stress, and inflammation. Adult male rats were fed a semipurified diet containing (1) sodium caseinate (CAS), (2) CAS plus daidzein and genistein (CAS+ISO), or (3) SPI for 2 weeks. A subset of rats was euthanized, and tissue was collected for quantitative real-time PCR (qPCR). Remaining rats underwent a middle cerebral artery occlusion to induce a stroke. Samples for qPCR were collected on day 3 poststroke. Rats fed SPI made fewer errors on the skilled ladder rung walking task after stroke compared to rats fed CAS (P < .05). Rats fed CAS+ISO were not different from rats fed CAS or SPI. Significant effects of diet were found at day 0 for Syp, Pparg, and Ywhae and at day 3 for Rtn4 expression. We concluded that the benefits of SPI are not solely attributable to daidzein and genistein.
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Affiliation(s)
- Elizabeth Dawn Grisley
- Department of Anatomy, Southern Illinois University School of Medicine, Carbondale, Illinois, USA
| | - Kalene N. Huber
- Department of Anatomy, Southern Illinois University School of Medicine, Carbondale, Illinois, USA
| | - Austen N. Knapp
- Department of Anatomy, Southern Illinois University School of Medicine, Carbondale, Illinois, USA
| | | | - William J. Banz
- Department of Animal Science, Food, and Nutrition, Southern Illinois University, Carbondale, Illinois, USA
| | - James A. MacLean
- Department of Physiology, Southern Illinois University School of Medicine, Carbondale, Illinois, USA
| | - Douglas G. Wallace
- Department of Psychology, Northern Illinois University, Dekalb, Illinois, USA
| | - Joseph L. Cheatwood
- Department of Anatomy, Southern Illinois University School of Medicine, Carbondale, Illinois, USA.,Address correspondence to: Joseph L. Cheatwood, PhD, Department of Anatomy, Southern Illinois University School of Medicine, 1135 Lincoln Drive, Carbondale, IL 62901, USA,
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Zhang Y, Abe C, Ochiai K, Matsui T. Tissue Distribution of Orally Administered Prenylated Isoflavones, Glyceollins, in Sprague-Dawley Rats. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:15165-15174. [PMID: 34875172 DOI: 10.1021/acs.jafc.1c05208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Apart from the physiological effects of glyceollins, information regarding their tissue distribution is scarce in the literature. Thus, the aim of this study is to clarify the distribution of glyceollins in rat organs. Glyceollins I and III were orally administered to Sprague-Dawley rats (1.0 mg/kg) with daidzein as control, and their accumulations in organs were investigated by liquid chromatography-time-of-flight/mass spectrometry (LC-TOF/MS). Glyceollins accumulated in intact and conjugated forms in circulatory organs with a Tmax of 0.5 h, in the following order of descending preference: liver, kidney, heart, lung, soleus muscle, and abdominal aorta. The accumulation of hydrophobic glyceollin I was more than 1.5 times higher than that of III. In contrast, daidzein and hydroxy equol were detected only in the liver and kidneys at lower concentrations (1/100 times) than those of glyceollins. In conclusion, prenylated isoflavones, glyceollins, were preferentially distributed in circulatory organs as intact, sulfated, or glucuronidated forms up to 6 h after the intake.
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Affiliation(s)
- Ye Zhang
- Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School of Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Chizumi Abe
- Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School of Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Koji Ochiai
- DAIZ Inc., 3-14-3 Minami-kumamoto, Chuo-ku, Kumamoto 860-0812, Japan
| | - Toshiro Matsui
- Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School of Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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González-Domínguez R, Urpi-Sarda M, Jáuregui O, Needs PW, Kroon PA, Andrés-Lacueva C. Quantitative Dietary Fingerprinting (QDF)-A Novel Tool for Comprehensive Dietary Assessment Based on Urinary Nutrimetabolomics. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:1851-1861. [PMID: 30799616 DOI: 10.1021/acs.jafc.8b07023] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Accurate dietary assessment is a challenge in nutritional research, needing powerful and robust tools for reliable measurement of food intake biomarkers. In this work, we have developed a novel quantitative dietary fingerprinting (QDF) approach, which enables for the first time the simultaneous quantitation of about 350 urinary food-derived metabolites, including (poly)phenolic aglycones, phase II metabolites, and microbial-transformed compounds, as well as other compounds (e.g., glucosinolates, amino acid derivatives, methylxanthines, alkaloids, and markers of alcohol and tobacco consumption). This method was fully validated for 220 metabolites, yielding good linearity, high sensitivity and precision, accurate recovery rates, and negligible matrix effects. Furthermore, 127 additional phase II metabolites were also included in this method after identification in urines collected from acute dietary interventions with various foods. Thus, this metabolomic approach represents one-step further toward precision nutrition and the objective of improving the accurateness and comprehensiveness in the assessment of dietary patterns and lifestyles.
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Affiliation(s)
- Raúl González-Domínguez
- Biomarkers and Nutrimetabolomics Laboratory, Department of Nutrition, Food Sciences and Gastronomy, Food Technology Reference Net (XaRTA), Nutrition and Food Safety Research Institute (INSA), Faculty of Pharmacy and Food Sciences , University of Barcelona , 08028 Barcelona , Spain
- CIBER Fragilidad y Envejecimiento Saludable (CIBERfes) , Instituto de Salud Carlos III , 08028 Barcelona , Spain
| | - Mireia Urpi-Sarda
- Biomarkers and Nutrimetabolomics Laboratory, Department of Nutrition, Food Sciences and Gastronomy, Food Technology Reference Net (XaRTA), Nutrition and Food Safety Research Institute (INSA), Faculty of Pharmacy and Food Sciences , University of Barcelona , 08028 Barcelona , Spain
- CIBER Fragilidad y Envejecimiento Saludable (CIBERfes) , Instituto de Salud Carlos III , 08028 Barcelona , Spain
| | - Olga Jáuregui
- CIBER Fragilidad y Envejecimiento Saludable (CIBERfes) , Instituto de Salud Carlos III , 08028 Barcelona , Spain
- Scientific and Technological Center of University of Barcelona (CCiTUB) , 08028 Barcelona , Spain
| | - Paul W Needs
- Quadram Institute Bioscience , Norwich Research Park, Norwich NR4 7UA , United Kingdom
| | - Paul A Kroon
- Quadram Institute Bioscience , Norwich Research Park, Norwich NR4 7UA , United Kingdom
| | - Cristina Andrés-Lacueva
- Biomarkers and Nutrimetabolomics Laboratory, Department of Nutrition, Food Sciences and Gastronomy, Food Technology Reference Net (XaRTA), Nutrition and Food Safety Research Institute (INSA), Faculty of Pharmacy and Food Sciences , University of Barcelona , 08028 Barcelona , Spain
- CIBER Fragilidad y Envejecimiento Saludable (CIBERfes) , Instituto de Salud Carlos III , 08028 Barcelona , Spain
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Consumption of a soy drink has no effect on cognitive function but may alleviate vasomotor symptoms in post-menopausal women; a randomised trial. Eur J Nutr 2019; 59:755-766. [PMID: 30863894 PMCID: PMC7058672 DOI: 10.1007/s00394-019-01942-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 03/02/2019] [Indexed: 01/13/2023]
Abstract
PURPOSE Cognitive decline is commonly reported during the menopausal transition, with memory and attention being particularly affected. The aim of this study was to investigate the effects of a commercially available soy drink on cognitive function and menopausal symptoms in post-menopausal women. METHODS 101 post-menopausal women, aged 44-63 years, were randomly assigned to consume a volume of soy drink providing a low (10 mg/day; control group), medium (35 mg/day), or high (60 mg/day) dose of isoflavones for 12 weeks. Cognitive function (spatial working memory, spatial span, pattern recognition memory, 5-choice reaction time, and match to sample visual search) was assessed using CANTAB pre- and post-the 12 week intervention. Menopausal symptoms were assessed using Greene's Climacteric Scale. RESULTS No significant differences were observed between the groups for any of the cognitive function outcomes measured. Soy drink consumption had no effect on menopausal symptoms overall; however, when women were stratified according to the severity of vasomotor symptoms (VMS) at baseline, women with more severe symptoms at baseline in the medium group had a significant reduction (P = 0.001) in VMS post-intervention (mean change from baseline score: - 2.15 ± 1.73) in comparison to those with less severe VMS (mean change from baseline score: 0.06 ± 1.21). CONCLUSIONS Soy drink consumption had no effect on cognitive function in post-menopausal women. Consumption of ~ 350 ml/day (35 mg IFs) for 12 weeks significantly reduced VMS in those with more severe symptoms at baseline. This finding is clinically relevant as soy drinks may provide an alternative, natural, treatment for alleviating VMS, highly prevalent among western women.
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Zhao D, Simon JE, Wu Q. A critical review on grape polyphenols for neuroprotection: Strategies to enhance bioefficacy. Crit Rev Food Sci Nutr 2019; 60:597-625. [PMID: 30614258 DOI: 10.1080/10408398.2018.1546668] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The aging of populations worldwide is driving greater demands for dietary polyphenols which have been recognized as promising prophylactic and/or therapeutic agents in the context of neurodegeneration, and are ubiquitously present in plant-based diets. In particular, grape-derived products encompass a wide array of phenolic compounds purported with multiple health benefits including neuroprotective efficacy. Despite the increasing preclinical and clinical evidence demonstrating high potential of grape polyphenol (GPP)-rich botanicals in preventing and attenuating diverse neurodegenerative disorders, the limited bioavailability of GPPs, especially in the brain, generates questions as to their applications and effectiveness in neuroprotection. To address this issue, significant research efforts have been made to enhance oral bioavailability of GPPs via application of novel strategies. This review highlights some critical issues related to the bioavailability and neuroprotective efficacy of GPPs and GPP-rich botanicals. The representative bioavailability-enhancing strategies are critically reviewed to provide practical solutions for augmenting the bioefficacy of GPP-rich botanicals. Synergistic applications of encapsulation techniques (for physiochemical protection and bypassing xenobiotic metabolism) and dietary intervention strategies involving modulation of gut microbiota (for generating more bioavailable phenolic metabolites) appear promising, and may substantially enhance the bioefficacy, especially the neuroprotective efficacy, of orally consumed GPPs.
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Affiliation(s)
- Danyue Zhao
- New Use Agriculture and Natural Plant Products Program, Department of Plant Biology, School of Environmental and Biological Sciences, Rutgers University, New Brunswick, New Jersey, USA
| | - James E Simon
- New Use Agriculture and Natural Plant Products Program, Department of Plant Biology, School of Environmental and Biological Sciences, Rutgers University, New Brunswick, New Jersey, USA
| | - Qingli Wu
- New Use Agriculture and Natural Plant Products Program, Department of Plant Biology, School of Environmental and Biological Sciences, Rutgers University, New Brunswick, New Jersey, USA
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Hüser S, Guth S, Joost HG, Soukup ST, Köhrle J, Kreienbrock L, Diel P, Lachenmeier DW, Eisenbrand G, Vollmer G, Nöthlings U, Marko D, Mally A, Grune T, Lehmann L, Steinberg P, Kulling SE. Effects of isoflavones on breast tissue and the thyroid hormone system in humans: a comprehensive safety evaluation. Arch Toxicol 2018; 92:2703-2748. [PMID: 30132047 PMCID: PMC6132702 DOI: 10.1007/s00204-018-2279-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Accepted: 07/31/2018] [Indexed: 02/06/2023]
Abstract
Isoflavones are secondary plant constituents of certain foods and feeds such as soy, linseeds, and red clover. Furthermore, isoflavone-containing preparations are marketed as food supplements and so-called dietary food for special medical purposes to alleviate health complaints of peri- and postmenopausal women. Based on the bioactivity of isoflavones, especially their hormonal properties, there is an ongoing discussion regarding their potential adverse effects on human health. This review evaluates and summarises the evidence from interventional and observational studies addressing potential unintended effects of isoflavones on the female breast in healthy women as well as in breast cancer patients and on the thyroid hormone system. In addition, evidence from animal and in vitro studies considered relevant in this context was taken into account along with their strengths and limitations. Key factors influencing the biological effects of isoflavones, e.g., bioavailability, plasma and tissue concentrations, metabolism, temporality (pre- vs. postmenopausal women), and duration of isoflavone exposure, were also addressed. Final conclusions on the safety of isoflavones are guided by the aim of precautionary consumer protection.
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Affiliation(s)
- S Hüser
- Institute for Food Toxicology, Senate Commission on Food Safety, University of Veterinary Medicine Hannover, Hannover, Germany
| | - S Guth
- Institute for Food Toxicology, Senate Commission on Food Safety, University of Veterinary Medicine Hannover, Hannover, Germany
| | - H G Joost
- Department of Experimental Diabetology, German Institute of Human Nutrition (DIfE), Nuthetal, Germany
| | - S T Soukup
- Department of Safety and Quality of Fruit and Vegetables, Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Haid-und-Neu-Str. 9, 76131, Karlsruhe, Germany
| | - J Köhrle
- Institut für Experimentelle Endokrinologie, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, CVK, Berlin, Germany
| | - L Kreienbrock
- Department of Biometry, Epidemiology and Information Processing, University of Veterinary Medicine Hannover, Hannover, Germany
| | - P Diel
- Department of Molecular and Cellular Sports Medicine, Institute of Cardiovascular Research and Sports Medicine, German Sport University Cologne, Cologne, Germany
| | - D W Lachenmeier
- Chemisches und Veterinäruntersuchungsamt Karlsruhe, Karlsruhe, Germany
| | - G Eisenbrand
- Division of Food Chemistry and Toxicology, Molecular Nutrition, Department of Chemistry, Technische Universität Kaiserslautern, Kaiserslautern, Germany
| | - G Vollmer
- Department of Biology, Molecular Cell Physiology and Endocrinology, Technische Universität Dresden, Dresden, Germany
| | - U Nöthlings
- Department of Nutrition and Food Sciences, Nutritional Epidemiology, Rheinische Friedrich-Wilhelms University Bonn, Bonn, Germany
| | - D Marko
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - A Mally
- Department of Toxicology, University of Würzburg, Würzburg, Germany
| | - T Grune
- Department of Molecular Toxicology, German Institute of Human Nutrition (DIfE), Nuthetal, Germany
| | - L Lehmann
- Department of Food Chemistry, Institute for Pharmacy and Food Chemistry, University of Würzburg, Würzburg, Germany
| | - P Steinberg
- Institute for Food Toxicology, University of Veterinary Medicine Hannover, Hannover, Germany
- Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Haid-und-Neu-Str. 9, 76131, Karlsruhe, Germany
| | - S E Kulling
- Department of Safety and Quality of Fruit and Vegetables, Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Haid-und-Neu-Str. 9, 76131, Karlsruhe, Germany.
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Optimization of ionic liquids-based microwave-assisted hydrolysis of puerarin and daidzein derivatives from Radix Puerariae Lobatae extract. Food Chem 2018; 256:149-155. [DOI: 10.1016/j.foodchem.2017.12.080] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 11/15/2017] [Accepted: 12/26/2017] [Indexed: 11/21/2022]
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Venkitaraman R, Thomas K, Grace P, Dearnaley D, Horwich A, Huddart R, Parker C. Baseline Urinary Phytoestrogen Levels and the Natural History of Untreated, Localised Prostate Cancer in a British Population. Int J Biol Markers 2018; 23:192-7. [DOI: 10.1177/172460080802300310] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Aim To determine whether urinary concentrations of phytoestrogens are associated with the rate of disease progression in men with untreated, localised prostate cancer. Patients and methods Patients with untreated, localised prostatic adenocarcinoma on a prospective clinical study of active surveillance had urine samples collected at baseline. Patients underwent monitoring with serial PSA levels and repeat octant prostate biopsies. Disease progression was defined as either adverse histology on repeat biopsy (primary Gleason grade ≥4, or >50% positive cores) or radical treatment for PSA velocity >1 ng/mL/year. Time to disease progression was analysed with respect to baseline urinary levels of genistein, enterolactone, daidzein and equol, assayed using liquid chromatography/tandem mass spectrometry. Results 191 patients were evaluable, with a median follow-up of 2.5 years. 71 patients experienced disease progression. No significant association was seen between time to disease progression and baseline urinary levels of daidzein (p=0.85), genistein (p=0.81), enterolactone (p=0.085) or equol (p=0.33). No significant association was seen between adverse histology on repeat biopsy and urinary levels of either daidzein (p=0.85), genistein (p=0.58), enterolactone (p=0.88) or equol (p=0.71). There was no significant correlation between PSA velocity and urinary levels of daidzein (p=0.90), genistein (p=0.98), enterolactone (p=0.10) or equol (p=0.60). Conclusion These data do not support the hypothesis that phytoestrogens prevent disease progression in men with localised prostate cancer.
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Affiliation(s)
- R. Venkitaraman
- Academic Unit of Radiotherapy and Oncology, Institute of Cancer Research, Sutton, Surrey
| | - K. Thomas
- Computing Department, Royal Marsden NHS Foundation Trust, Sutton, Surrey
| | - P. Grace
- HFL limited, Fordham, Cambridge - UK
| | - D. Dearnaley
- Academic Unit of Radiotherapy and Oncology, Institute of Cancer Research, Sutton, Surrey
| | - A. Horwich
- Academic Unit of Radiotherapy and Oncology, Institute of Cancer Research, Sutton, Surrey
| | - R. Huddart
- Academic Unit of Radiotherapy and Oncology, Institute of Cancer Research, Sutton, Surrey
| | - C.C. Parker
- Academic Unit of Radiotherapy and Oncology, Institute of Cancer Research, Sutton, Surrey
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Gardana C, Simonetti P. Long-term kinetics of daidzein and its main metabolites in human equol-producers after soymilk intake: identification of equol-conjugates by UPLC-orbitrap-MS and influence of the number of transforming bacteria on plasma kinetics. Int J Food Sci Nutr 2016; 68:496-506. [PMID: 27851886 DOI: 10.1080/09637486.2016.1256380] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The main aim of the study was to establish in vivo a correlation between equol (EQU) production and a number of intestinal bacteria able to perform the transformation. Thus, healthy female volunteers were selected for their ability to convert slowly (n = 6, 105-109 cells/g wet feces) or quickly (n = 6, 1010-1012 cells/g wet feces) daidzein (DAI) in EQU. After oral administration of 100 mg DAI in soymilk, plasma (0-99 h) and urine (0-96 h) samples were collected. DAI and its metabolites were determined by LC-MS/MS and EQU -conjugates by UPLC-High Resolution-MS. Only for EQU a direct correlation was found between the number of transforming microorganisms and parameters such as tmax and t1/2 (p = 0.027). Peak serum concentration time, Cmax, AUC0-72 h and t1/2 for total EQU (n = 12) were 36 ± 10 h, 89 ± 78 nM, 2.4 ± 1.7 (μmol × h/L) and 15.6 ± 3.3 h, respectively. In plasma and urine EQU was found mainly as 7-O-glucuronide.
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Affiliation(s)
- Claudio Gardana
- a Department of Food, Environmental and Nutritional Sciences, Division of Human Nutrition , Università degli Studi di Milano , Milano , Italy
| | - Paolo Simonetti
- a Department of Food, Environmental and Nutritional Sciences, Division of Human Nutrition , Università degli Studi di Milano , Milano , Italy
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12
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Ronis MJ, Gomez-Acevedo H, Blackburn ML, Cleves MA, Singhal R, Badger TM. Uterine responses to feeding soy protein isolate and treatment with 17β-estradiol differ in ovariectomized female rats. Toxicol Appl Pharmacol 2016; 297:68-80. [PMID: 26945725 DOI: 10.1016/j.taap.2016.02.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 02/19/2016] [Accepted: 02/22/2016] [Indexed: 12/23/2022]
Abstract
There are concerns regarding reproductive toxicity from consumption of soy foods, including an increased risk of endometriosis and endometrial cancer, as a result of phytoestrogen consumption. In this study, female rats were fed AIN-93G diets made with casein (CAS) or soy protein isolate (SPI) from postnatal day (PND) 30, ovariectomized on PND 50 and infused with 5 μg/kg/d 17β-estradiol (E2) or vehicle. E2 increased uterine wet weight (P<0.05). RNAseq analysis revealed that E2 significantly altered expression of 1991 uterine genes (P<0.05). SPI feeding had no effect on uterine weight and altered expression of far fewer genes than E2 at 152 genes (P<0.05). Overlap between E2 and SPI genes was limited to 67 genes. Functional annotation analysis indicated significant differences in uterine biological processes affected by E2 and SPI and little evidence for recruitment of estrogen receptor (ER)α to the promoters of ER-responsive genes after SPI feeding. The major E2 up-regulated uterine pathways were carcinogenesis and extracellular matrix organization, whereas SPI feeding up-regulated uterine peroxisome proliferator activated receptor (PPAR) signaling and fatty acid metabolism. The combination of E2 and SPI resulted in significant regulation of 504 fewer genes relative to E2 alone. The ability of E2 to induce uterine proliferation in response to the carcinogen dimethybenz(a)anthracene (DMBA) as measured by expression of PCNA and Ki67 mRNA was suppressed by feeding SPI (P<0.05). These data suggest that SPI is a selective estrogen receptor modulator (SERM) interacting with a small sub-set of E2-regulated genes and is anti-estrogenic in the presence of endogenous estrogens.
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Affiliation(s)
- Martin J Ronis
- Department of Pharmacology & Experimental Therapeutics, Louisiana State University Health Sciences Center, New Orleans, LA 70112, United States.
| | - Horacio Gomez-Acevedo
- Arkansas Children's Nutrition Center, University of Arkansas for Medical Sciences, Little Rock, AR 72202, United States
| | - Michael L Blackburn
- Arkansas Children's Nutrition Center, University of Arkansas for Medical Sciences, Little Rock, AR 72202, United States
| | - Mario A Cleves
- Arkansas Children's Nutrition Center, University of Arkansas for Medical Sciences, Little Rock, AR 72202, United States; Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR 72202, United States
| | - Rohit Singhal
- Department of Pharmacology & Toxicology, University of Arkansas for Medical Sciences, Little Rock, AR 72202, United States
| | - Thomas M Badger
- Arkansas Children's Nutrition Center, University of Arkansas for Medical Sciences, Little Rock, AR 72202, United States; Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR 72202, United States
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13
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The role of natural polyphenols in cell signaling and cytoprotection against cancer development. J Nutr Biochem 2015; 32:1-19. [PMID: 27142731 DOI: 10.1016/j.jnutbio.2015.11.006] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 10/13/2015] [Accepted: 11/09/2015] [Indexed: 12/20/2022]
Abstract
The cytoprotective and anticancer action of dietary in-taken natural polyphenols has for long been attributed only to their direct radical scavenging activities. Currently it is well supported that those compounds display a broad spectrum of biological and pharmacological outcomes mediated by their complex metabolism, interaction with gut microbiota as well as direct interactions of their metabolites with key cellular signaling proteins. The beneficial effects of natural polyphenols and their synthetic derivatives are extensively studied in context of cancer prophylaxis and therapy. Herein we focus on cell signaling to explain the beneficial role of polyphenols at the three stages of cancer development: we review the recent proceedings about the impact of polyphenols on the cytoprotective antioxidant response and their proapoptotic action at the premalignant stage, and finally we present data showing how phenolic acids (e.g., caffeic, chlorogenic acids) and flavonols (e.g., quercetin) hamper the development of metastatic cancer.
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Chen JR, Lazarenko OP, Blackburn ML, Badger TM, Ronis MJJ. Soy protein isolate inhibits high-fat diet-induced senescence pathways in osteoblasts to maintain bone acquisition in male rats. Endocrinology 2015; 156:475-87. [PMID: 25490147 PMCID: PMC4298323 DOI: 10.1210/en.2014-1427] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Chronic consumption by experimental animals of a typical Western diet high in saturated fats and cholesterol during postnatal life has been demonstrated to impair skeletal development. However, the underlying mechanism by which high-fat, energy-dense diets affect bone-forming cell phenotypes is poorly understood. Here, we show that male weanling rats fed a diet containing 45% fat and 0.5% cholesterol made with casein (HF-Cas) for 6 weeks displayed lower bone mineral density and strength compared with those of AIN-93G-fed dietary controls. Substitution of casein with soy protein isolate (SPI) in the high-fat diet (HF-SPI) prevented these effects. The bone-sparing effects of SPI were associated with prevention of HF-Cas-induced osteoblast senescence pathways through suppression of the p53/p21 signaling pathways. HF-Cas-fed rats had increased caveolin-1 and down-regulated Sirt1, leading to activations of peroxisome proliferator-activated receptor γ (PPARγ) and p53/p21, whereas rats fed HF-SPI suppressed caveolin-1 and activated Sirt1 to deacetylate PPARγ and p53 in bone. Treatment of osteoblastic cells with nonesterified free fatty acid (NEFA) increased cell senescence signaling pathways. Isoflavones significantly blocked activations of senescence-associated β-galactosidase and PPARγ/p53/p21 by NEFA. Finally, replicative senescent osteoblastic cells and bone marrow mesenchymal ST2 cells exhibited behavior similar to that of cells treated with NEFA and in vivo bone cells in rats fed the HF-Cas diet. These results suggest that (1) high concentrations of NEFA occurring with HF intake are mediators of osteoblast cell senescence leading to impairment of bone development and acquisition and (2) the molecular mechanisms underlying the SPI-protective effects involve isoflavone-induced inhibition of osteoblastic cell senescence to prevent HF-induced bone impairments.
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Affiliation(s)
- Jin-Ran Chen
- Arkansas Children's Nutrition Center (J.-R.C., O.P.L, M.L.B., T.M.B., M.J.J.R.), Little Rock, Arkansas 72202; and Department of Pediatrics (J.-R.C., O.P.L, M.L.B., T.M.B., M.J.J.R.), University of Arkansas for Medical Sciences, Little Rock, Arkansas 72202
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15
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Stout JM, Knapp AN, Banz WJ, Wallace DG, Cheatwood JL. Subcutaneous daidzein administration enhances recovery of skilled ladder rung walking performance following stroke in rats. Behav Brain Res 2013; 256:428-31. [DOI: 10.1016/j.bbr.2013.08.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 08/12/2013] [Accepted: 08/18/2013] [Indexed: 01/01/2023]
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Chen JR, Zhang J, Lazarenko OP, Cao JJ, Blackburn ML, Badger TM, Ronis MJJ. Soy protein isolates prevent loss of bone quantity associated with obesity in rats through regulation of insulin signaling in osteoblasts. FASEB J 2013; 27:3514-23. [PMID: 23776073 DOI: 10.1096/fj.12-226464] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
In both rodents and humans, excessive consumption of a typical Western diet high in saturated fats and cholesterol is known to result in disruption of energy metabolism and development of obesity and insulin resistance. However, how these high-fat, energy-dense diets affect bone development, morphology, and modeling is poorly understood. Here we show that male weanling rats fed a high-fat (HF) diet containing 45% fat and 0.5% cholesterol made with casein (HF-Cas) for 6 wk displayed a significant increase in bone marrow adiposity and insulin resistance. Substitution of casein with soy protein isolate (SPI) in the HF diet (HF-SPI) prevented these effects. Maintenance of bone quantity in the SPI-fed rats was associated with increased undercarboxylated osteocalcin secretion and altered JNK/IRS1/Akt insulin signaling in osteoblasts. The HF-Cas group had significantly greater serum nonesterified free fatty acid (NEFA) concentrations than controls, whereas the HF-SPI prevented this increase. In vitro treatment of osteoblasts or mesenchymal stromal ST2 cells with NEFAs significantly decreased insulin signaling. An isoflavone mixture similar to that found in serum of HF-SPI rats significantly increased in vitro osteoblast proliferation and blocked significantly reduced NEFA-induced insulin resistance. Finally, insulin/IGF1 was able to increase both osteoblast activity and differentiation in a set of in vitro studies. These results suggest that high-fat feeding may disrupt bone development and modeling; high concentrations of NEFAs and insulin resistance occurring with high fat intake are mediators of reduced osteoblast activity and differentiation; diets high in soy protein may help prevent high dietary fat-induced bone impairments; and the molecular mechanisms underlying the SPI-protective effects involve isoflavone-induced normalization of insulin signaling in bone.
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Affiliation(s)
- Jin-Ran Chen
- Arkansas Children's Nutrition Center, 15 Children's Way, Slot 512-20B, Little Rock, AR 72202, USA.
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17
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Gutierrez-Orozco F, Chitchumroonchokchai C, Lesinski GB, Suksamrarn S, Failla ML. α-Mangostin: anti-inflammatory activity and metabolism by human cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:3891-900. [PMID: 23578285 PMCID: PMC3793015 DOI: 10.1021/jf4004434] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Information about the anti-inflammatory activity and metabolism of α-mangostin (α-MG), the most abundant xanthone in mangosteen fruit, in human cells is limited. On the basis of available literature, we hypothesized that α-MG will inhibit the secretion of pro-inflammatory mediators by control and activated macrophage-like THP-1, hepatic HepG2, enterocyte-like Caco-2, and colon HT-29 human cell lines, as well as primary human monocyte-derived macrophages (MDM), and that such activity would be influenced by the extent of metabolism of the xanthone. α-MG attenuated TNF-α and IL-8 secretion by the various cell lines but increased TNF-α output by both quiescent and LPS-treated MDM. The relative amounts of free and phase II metabolites of α-MG and other xanthones present in media 24 h after addition of α-MG was shown to vary by cell type and inflammatory insult. Increased transport of xanthones and their metabolites across Caco-2 cell monolayers suggests enhanced absorption during an inflammatory episode. The anti-inflammatory activities of xanthones and their metabolites in different tissues merit consideration.
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Affiliation(s)
- Fabiola Gutierrez-Orozco
- Interdisciplinary Ph.D. Program in Nutrition, The Ohio State University, Columbus, Ohio 43210, United States
| | | | - Gregory B. Lesinski
- Department of Internal Medicine, The Ohio State University, Columbus, Ohio 43210, United States
| | - Sunit Suksamrarn
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Srinakharinwirot University, Bangkok, Thailand
| | - Mark L. Failla
- Interdisciplinary Ph.D. Program in Nutrition, The Ohio State University, Columbus, Ohio 43210, United States
- Human Nutrition Program, The Ohio State University, Columbus, Ohio 43210, United States
- Corresponding Author
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Pisani SL, Neese SL, Doerge DR, Helferich WG, Schantz SL, Korol DL. Acute genistein treatment mimics the effects of estradiol by enhancing place learning and impairing response learning in young adult female rats. Horm Behav 2012; 62:491-9. [PMID: 22944517 PMCID: PMC3495242 DOI: 10.1016/j.yhbeh.2012.08.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 08/17/2012] [Accepted: 08/20/2012] [Indexed: 12/12/2022]
Abstract
Endogenous estrogens have bidirectional effects on learning and memory, enhancing or impairing cognition depending on many variables, including the task and the memory systems that are engaged. Moderate increases in estradiol enhance hippocampus-sensitive place learning, yet impair response learning that taps dorsal striatal function. This memory modulation likely occurs via activation of estrogen receptors, resulting in altered neural function. Supplements containing estrogenic compounds from plants are widely consumed despite limited information about their effects on brain function, including learning and memory. Phytoestrogens can enter the brain and signal through estrogen receptors to affect cognition. Enhancements in spatial memory and impairments in executive function have been found following treatment with soy phytoestrogens, but no tests of actions on striatum-sensitive tasks have been made to date. The present study compared the effects of acute exposure to the isoflavone genistein with the effects of estradiol on performance in place and response learning tasks. Long-Evans rats were ovariectomized, treated with 17β-estradiol benzoate, genistein-containing sucrose pellets, or vehicle (oil or plain sucrose pellets) for 2 days prior to behavioral training. Compared to vehicle controls, estradiol treatment enhanced place learning at a low (4.5 μg/kg) but not high dose (45 μg/kg), indicating an inverted pattern of spatial memory facilitation. Treatment with 4.4 mg of genistein over 2 days also significantly enhanced place learning over vehicle controls. For the response task, treatment with estradiol impaired learning at both low and high doses; likewise, genistein treatment impaired response learning compared to rats receiving vehicle. Overall, genistein was found to mimic estradiol-induced shifts in place and response learning, facilitating hippocampus-sensitive learning and slowing striatum-sensitive learning. These results suggest signaling through estrogen receptor β and membrane-associated estrogen receptors in learning enhancements and impairments given the preferential binding of genistein to the ERβ subtype and affinity for GPER.
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Affiliation(s)
- Samantha L Pisani
- Neuroscience Program, University of Illinois at Urbana-Champaign, 505 South Goodwin Avenue, Urbana, IL 61801, USA.
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Kakehashi A, Tago Y, Yoshida M, Sokuza Y, Wei M, Fukushima S, Wanibuchi H. Hormonally Active Doses of Isoflavone Aglycones Promote Mammary and Endometrial Carcinogenesis and Alter the Molecular Tumor Environment in Donryu Rats. Toxicol Sci 2012; 126:39-51. [DOI: 10.1093/toxsci/kfs016] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Li G, Zeng X, Xie Y, Cai Z, Moore JC, Yuan X, Cheng Z, Ji G. Pharmacokinetic properties of isorhamnetin, kaempferol and quercetin after oral gavage of total flavones of Hippophae rhamnoides L. in rats using a UPLC–MS method. Fitoterapia 2012; 83:182-91. [DOI: 10.1016/j.fitote.2011.10.012] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Revised: 10/15/2011] [Accepted: 10/17/2011] [Indexed: 11/24/2022]
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Use of multivariate statistical techniques to optimize the separation of isoflavones by liquid chromatography. OPEN CHEM 2011. [DOI: 10.2478/s11532-011-0093-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AbstractThe aim of this paper is to optimize and validate a high performance liquid chromatography (HPLC) method for separation and quantification of five isoflavones. A statistical central composite design was used to separate all peaks. These multivariate procedures were efficient in determining the optimal separation condition using resolution, capacity factor, asymmetry and number of theoretical plates. The effective separation of the examined compounds was applied on a Develosil RP Aqueous AR 5 RP-30 column with a gradient mobile phase system and a DAD detector. The isolation and preconcentration of the isoflavones from urine and plasma samples were conducted by means of the solid-phase extraction (SPE). For optimize SPE conditions various sorbents were tested. Furthermore, high recoveries and good relative standard deviations were obtained when the samples were passed through the Oasis HLB column. The developed method was validated and successfully applied for determination of isoflavones in urine and plasma.
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Ronis MJJ, Chen Y, Liu X, Blackburn ML, Shankar K, Landes RD, Fang N, Badger TM. Enhanced expression and glucocorticoid-inducibility of hepatic cytochrome P450 3A involve recruitment of the pregnane-X-receptor to promoter elements in rats fed soy protein isolate. J Nutr 2011; 141:10-6. [PMID: 21084653 DOI: 10.3945/jn.110.127423] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Previous studies and Expt. 1 of the current study demonstrate that diets made with soy protein isolate (SPI) enhance the glucocorticoid-inducibility of hepatic cytochrome P450 (CYP)3A-dependent monooxygenase activities (P < 0.05) compared with diets made with casein (CAS). To determine the underlying molecular mechanism, in a second experiment, we analyzed the time course of dexamethasone (DEX)-induction of hepatic CYP3A mRNA expression on postnatal d (PND) 25 and PND60 in male and female rats fed SPI- or CAS-based diets. After 50 mg(/)kg DEX, CYP3A1 mRNA expression increased >200-fold in SPI-fed males and females at PND25 compared with a 100-fold increase in CAS-fed rats (P < 0.05). The DEX-induced increase in CYP3A1 mRNA in SPI-fed rats on PND60 was also greater than that in CAS-fed rats. The induction by DEX of CYP3A2 mRNA was 1- to 3-fold greater in rats fed SPI compared with those fed CAS on PND25 (P < 0.05). Quantitation of newly synthesized CYP3A1 RNA transcripts by nuclear run-on analysis demonstrated a greater rate of basal transcription in SPI-fed compared with CAS-fed rats on PND60 accompanied by greater binding of the pregnane X receptor (PXR) to a response element on the CYP3A1 promoter in SPI-fed compared with CAS-fed rats (P < 0.05). These data suggest that increased hepatic CYP3A expression and inducibility following SPI feeding involves recruitment of PXR to its response element and suggests that soy consumption has potential effects on metabolism and transport of a wide variety of drugs and on bile acid homeostasis via proteins regulated by this transcription factor.
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Affiliation(s)
- Martin J J Ronis
- Department of Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
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23
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Berry flavonoids and phenolics: bioavailability and evidence of protective effects. Br J Nutr 2010; 104 Suppl 3:S67-90. [DOI: 10.1017/s0007114510003958] [Citation(s) in RCA: 252] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Crozier A, Del Rio D, Clifford MN. Bioavailability of dietary flavonoids and phenolic compounds. Mol Aspects Med 2010; 31:446-67. [PMID: 20854839 DOI: 10.1016/j.mam.2010.09.007] [Citation(s) in RCA: 329] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2010] [Revised: 09/09/2010] [Accepted: 09/09/2010] [Indexed: 12/27/2022]
Abstract
This paper reviews recent human studies on the bioavailability of dietary flavonoids and related compounds, including chlorogenic acids and ellagitannins, in which the identification of metabolites, catabolites and parent compounds in plasma, urine and ileal fluid was based on mass spectrometric methodology. Compounds absorbed in the small intestine appear in the circulatory system predominantly as glucuronide, sulfate and methylated metabolites which seemingly are treated by the body as xenobiotics as they are rapidly removed from the bloodstream. As a consequence, while analysis of plasma provides valuable information on the identity and pharmacokinetic profiles of circulating metabolites after acute supplementation, it does not provide accurate quantitative assessments of uptake from the gastrointestinal tract. Urinary excretion, of which there are great variations with different classes of flavonoids, provides a more realistic figure but, as this does not include the possibility of metabolites being sequestered in body tissues, this too is an under estimate of absorption, but to what degree remains to be determined. Even when absorption occurs in the small intestine, feeding studies with ileostomists reveal that substantial amounts of the parent compounds and some of their metabolites appear in ileal fluid indicating that in volunteers with a functioning colon these compounds will pass to the large intestine where they are subjected to the action of the colonic microflora. A diversity of colonic-derived catabolites is absorbed into the bloodstream and passes through the body prior to excretion in urine. There is growing evidence that these compounds, which were little investigated until recently, are produced in quantity in the colon and form a key part of the bioavailability equation of dietary flavonoids and related phenolic compounds.
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Affiliation(s)
- Alan Crozier
- Plant Products and Human Nutrition Group, Graham Kerr Building, School of Medicine, University of Glasgow, Glasgow G12 8QQ, UK
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Bolca S, Urpi-Sarda M, Blondeel P, Roche N, Vanhaecke L, Possemiers S, Al-Maharik N, Botting N, De Keukeleire D, Bracke M, Heyerick A, Manach C, Depypere H. Disposition of soy isoflavones in normal human breast tissue. Am J Clin Nutr 2010; 91:976-84. [PMID: 20164315 DOI: 10.3945/ajcn.2009.28854] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Despite decades of research on the relation between soy and breast cancer, questions regarding the absorption, metabolism, and distribution of isoflavones in breast tissue largely remain unanswered. OBJECTIVE We evaluated the potential health effects of isoflavone consumption on normal breast tissue; isoflavone concentrations, metabolites, and biodistribution were investigated and compared with 17beta-estradiol exposure. DESIGN In this dietary intervention study, healthy women were randomly allocated to a soy milk (n = 11; 16.98-mg genistein and 5.40-mg daidzein aglycone equivalents per dose), soy supplement (n = 10; 5.27-mg genistein and 17.56-mg daidzein aglycone equivalents per dose), or control (n = 10) group. After a run-in period > or = 4 d, 3 doses of soy milk or soy supplements were taken daily for 5 d before an esthetic breast reduction. Blood and breast biopsies were collected during surgery and analyzed with liquid chromatography-tandem mass spectrometry. RESULTS After soy administration, genistein and total daidzein concentrations, which were expressed as aglycone equivalents, ranged from 135.1 to 2831 nmol/L and 105.1 to 1397 nmol/L, respectively, in hydrolyzed serum and from 92.33 to 493.8 pmol/g and 22.15 to 770.8 pmol/g, respectively, in hydrolyzed breast tissue. The major metabolites identified in nonhydrolyzed samples were genistein-7-O-glucuronide and daidzein-7-O-glucuronide, with an overall glucuronidation of 98%. Total isoflavones showed a breast adipose/glandular tissue distribution of 40:60, and their mean (+/-SEM) derived 17beta-estradiol equivalents toward estrogen receptor beta were 21 +/- 4-fold and 40 +/- 10-fold higher than the 17beta-estradiol concentrations in adipose (0.283 +/- 0.089 pmol/g, P < 0.001) and glandular (0.246 +/- 0.091 pmol/g, P = 0.001) fractions, respectively. CONCLUSION After intake of soy milk and soy supplements, isoflavones reach exposure levels in breast tissue at which potential health effects may occur.
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Affiliation(s)
- Selin Bolca
- Laboratory of Microbial Ecology and Technology, Faculty of Bioscience Engineering and the Laboratory of Experimental Cancer Research, Department of Experimental Cancer Research, Radiotherapy and Nuclear Medicine, Ghent University Hospital, Ghent, Belgium
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Nagarajan S. Mechanisms of anti-atherosclerotic functions of soy-based diets. J Nutr Biochem 2010; 21:255-60. [PMID: 19954957 DOI: 10.1016/j.jnutbio.2009.09.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2009] [Revised: 07/17/2009] [Accepted: 09/03/2009] [Indexed: 01/22/2023]
Abstract
Soy-based diets have been reported to protect against the development of atherosclerosis. However, the underlying mechanism(s) for this protection remains unknown. Although atherosclerosis was traditionally considered a disease associated with impaired lipid metabolism, in recent years the inflammatory components of atherosclerosis have been explored. Recent studies have convincingly delineated that uncontrolled chronic inflammation is the principal contributing factor for the initiation and progression of atherosclerosis. Interaction between activated monocytes and vascular endothelial cells is an early event in atherogenesis. The adhesion of leukocytes, including monocytes, to the inflamed-vascular endothelium and their transmigration into intima initiate the inflammatory processes. Following transmigration, monocytes in the intima are transformed to macrophages, which take up oxidized-LDL (oxLDL) to generate lipid-laden macrophages, also known as foam cells. Hence, in this review article the inflammatory processes associated with atherosclerosis and possible anti-inflammatory functions of soy-based diets contributing to the prevention of atherosclerosis are presented.
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Affiliation(s)
- Shanmugam Nagarajan
- Department of Microbiology and Immunology, Arkansas Children's Nutrition Center, University of Arkansas for Medical Sciences, Little Rock, AR 72202, USA.
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Bioavailability of the polyphenols: status and controversies. Int J Mol Sci 2010; 11:1321-42. [PMID: 20480022 PMCID: PMC2871118 DOI: 10.3390/ijms11041321] [Citation(s) in RCA: 532] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2010] [Revised: 02/28/2010] [Accepted: 03/15/2010] [Indexed: 12/15/2022] Open
Abstract
The current interest in polyphenols has been driven primarily by epidemiological studies. However, to establish conclusive evidence for the effectiveness of dietary polyphenols in disease prevention, it is useful to better define the bioavailability of the polyphenols, so that their biological activity can be evaluated. The bioavailability appears to differ greatly among the various phenolic compounds, and the most abundant ones in our diet are not necessarily those that have the best bioavailability profile. In the present review, we focus on the factors influencing the bioavailability of the polyphenols. Moreover, a critical overview on the difficulties and the controversies of the studies on the bioavailability is discussed.
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Abstract
Although the flavonol quercetin is used as a supplement in commercial dog food, data on quercetin bioavailability in dogs are not available. Thus, we investigated quercetin bioavailability (measured as area under the concentration–time curve) in nine adult beagle dogs at an oral dose of 10 mg/kg body weight (b.w.). The major fraction (>80 %) of flavonols circulating in blood plasma were conjugated metabolites of quercetin. The absolute bioavailability of quercetin (i.e. the fraction that reaches the systemic circulation) was only about 4 %. We also compared the oral bioavailability between the aglycone quercetin and its more often used glucorhamnoside (rutin) and 3-O-glucoside (isoquercitrin) at an equimolar dose of 30 μmol/kg b.w. (corresponding to 10 mg quercetin/kg). Quercetin and isoquercitrin were mainly absorbed in the small intestine with isoquercitrin being one and a half times more bioavailable than quercetin. Maximal plasma concentration after isoquercitrin treatment was 0·89 (sem 0·07) μmol/l. Although quercetin absorption from rutin was delayed, relative bioavailability was not lower than from the aglycone itself. The latter observation is in clear contrast to findings in human subjects, pigs or rats and might indicate that rutin is a better source of quercetin in dogs than in other species. However, potential in vivo quercetin effects beyond the gastrointestinal tract are limited by the intensive metabolism as well as by the rather low bioavailability of this flavonol.
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A large-scale chemical screen for regulators of the arginase 1 promoter identifies the soy isoflavone daidzeinas a clinically approved small molecule that can promote neuronal protection or regeneration via a cAMP-independent pathway. J Neurosci 2010; 30:739-48. [PMID: 20071539 DOI: 10.1523/jneurosci.5266-09.2010] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
An ideal therapeutic for stroke or spinal cord injury should promote survival and regeneration in the CNS. Arginase 1 (Arg1) has been shown to protect motor neurons from trophic factor deprivation and allow sensory neurons to overcome neurite outgrowth inhibition by myelin proteins. To identify small molecules that capture Arg1's protective and regenerative properties, we screened a hippocampal cell line stably expressing the proximal promoter region of the arginase 1 gene fused to a reporter gene against a library of compounds containing clinically approved drugs. This screen identified daidzein as a transcriptional inducer of Arg1. Both CNS and PNS neurons primed in vitro with daidzein overcame neurite outgrowth inhibition from myelin-associated glycoprotein, which was mirrored by acutely dissociated and cultured sensory neurons primed in vivo by intrathecal or subcutaneous daidzein infusion. Further, daidzein was effective in promoting axonal regeneration in vivo in an optic nerve crush model when given intraocularly without lens damage, or most importantly, when given subcutaneously after injury. Mechanistically, daidzein requires transcription and induction of Arg1 activity for its ability to overcome myelin inhibition. In contrast to canonical Arg1 activators, daidzein increases Arg1 without increasing CREB phosphorylation, suggesting its effects are cAMP-independent. Accordingly, it may circumvent known CNS side effects of some cAMP modulators. Indeed, daidzein appears to be safe as it has been widely consumed in soy products, crosses the blood-brain barrier, and is effective without pretreatment, making it an ideal candidate for development as a therapeutic for spinal cord injury or stroke.
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Felgines C, Texier O, Garcin P, Besson C, Lamaison JL, Scalbert A. Tissue distribution of anthocyanins in rats fed a blackberry anthocyanin-enriched diet. Mol Nutr Food Res 2009; 53:1098-103. [PMID: 19653220 DOI: 10.1002/mnfr.200800323] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Anthocyanins are natural dietary pigments that could be involved in various health effects. The aim of this study was to investigate the distribution of anthocyanins to various organs (bladder, prostate, testes, heart and adipose tissue) in rats fed with a blackberry anthocyanin-enriched diet for 12 days. Identification and quantification of anthocyanins were carried out by HPLC-DAD. The urinary excretion of total anthocyanins (native anthocyanins and their metabolites) was low (0.20 +/- 0.03%, n = 8). Proportions of anthocyanin derivatives (methylated anthocyanins and glucurono-conjugated derivatives) differed according to the organ considered. The bladder contained the highest levels of anthocyanins followed by the prostate. Prostate, testes and heart contained native cyanidin 3-glucoside and a small proportion of cyanidin monoglucuronide. Cyanidin 3-glucoside and methylated derivatives were present in adipose tissue. Thus, anthocyanin feeding in rats resulted in a wide distribution of anthocyanin derivatives to several organs. Identification of target tissues of anthocyanins may then help to understand the mechanisms of action of anthocyanins in vivo.
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Affiliation(s)
- Catherine Felgines
- Laboratoire de Pharmacognosie, Université Clermont 1, UFR Pharmacie, Clermont-Ferrand Cedex 1, France.
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Crozier A, Jaganath IB, Clifford MN. Dietary phenolics: chemistry, bioavailability and effects on health. Nat Prod Rep 2009; 26:1001-43. [PMID: 19636448 DOI: 10.1039/b802662a] [Citation(s) in RCA: 1168] [Impact Index Per Article: 77.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
There is much epidemiological evidence that diets rich in fruit and vegetables can reduce the incidence of non-communicable diseases such as cardiovascular diseases, diabetes, cancer and stroke. These protective effects are attributed, in part, to phenolic secondary metabolites. This review summarizes the chemistry, biosynthesis and occurrence of the compounds involved, namely the C6-C3-C6 flavonoids-anthocyanins, dihydrochalcones, flavan-3-ols, flavanones, flavones, flavonols and isoflavones. It also includes tannins, phenolic acids, hydroxycinnamates and stilbenes and the transformation of plant phenols associated with food processing (for example, production of black tea, roasted coffee and matured wines), these latter often being the major dietary sources. Events that occur following ingestion are discussed, in particular, the deglycosylation, glucuronidation, sulfation and methylation steps that occur at various points during passage through the wall of the small intestine into the circulatory system and subsequent transport to the liver in the portal vein.We also summarise the fate of compounds that are not absorbed in the small intestine, but which pass into the large intestine where they are degraded by the colonic microflora to phenolic acids, which can be absorbed into the circulatory system and subjected to phase II metabolism prior to excretion. Initially, the protective effect of dietary phenolics was thought to be due to their antioxidant properties which resulted in a lowering of the levels of free radicals within the body.However, there is now emerging evidence that themetabolites of dietary phenolics,which appear in the circulatory systemin nmol/L to low mmol/L concentrations, exertmodulatory effects in cells through selective actions on different components of the intracellular signalling cascades vital for cellular functions such as growth, proliferation and apoptosis. In addition, the intracellular concentrations required to affect cell signalling pathways are considerably lower than those required to impact on antioxidant capacity. The mechanisms underlying these processes are discussed.
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Affiliation(s)
- Alan Crozier
- Graham Kerr Building, Division of Ecology and Evolutionary Biology, University of Glasgow, Glasgow G12 8QQ, UK.
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Mullen W, Rouanet JM, Auger C, Teissèdre PL, Caldwell ST, Hartley RC, Lean MEJ, Edwards CA, Crozier A. Bioavailability of [2-(14)C]quercetin-4'-glucoside in rats. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:12127-37. [PMID: 19053221 DOI: 10.1021/jf802754s] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
[2-(14)C]quercetin-4'-glucoside (4 mg/kg body weight) was fed by gavage to rats housed in metabolic cages, and over an ensuing 72 h period, radiolabeled products in body tissues, plasma, feces, and urine were monitored by high-performance liquid chromatography with online radioactivity and MS2 detection. One and 6 h after ingestion, while in the small intestine, the flavonol glucoside was converted to glucuronide and methylated and sulfated derivatives of quercetin, but only trace amounts of these metabolites were excreted in urine. On entering the cecum and the colon, the flavonol metabolites declined as they were converted to phenolic acids, principally 3-hydroxyphenylacetic acid and 3,4-dihydroxyphenylacetic acid, by the colonic microflora. Feces contained mainly 3-hydroxyphenylacetic acid. Urine collected 0-12 and 0-24 h after ingestion contained radiolabeled hippuric acid and 3-hydroxyphenylacetic acid. 14C-Hippuric acid declined markedly in the 24-48 and 48-72 h urine samples, and there was a concomitant increase in labeled benzoic acid. There was minimal accumulation of radioactivity in plasma, despite a 69% recovery of label in urine over the 72 h period, and likewise, very little radioactivity was detected in body tissues out with the gastrointestinal tract. This is reflected in the fact that 72 h after ingestion 96% of the ingested radioactivity was recovered in feces, urine, and the cage washes, which comprise a mixture of urine and feces. The study reveals that as it passes through the gastrointestinal tract, almost all of the of [2-(14)C]quercetin-4'-glucoside is converted to phenolic acids, compounds not monitored in previous flavonol bioavailability studies with model animal systems, some of which have used exceedingly high doses of the aglycone quercetin (500 mg/kg body weight), which is not a normal dietary component.
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Affiliation(s)
- William Mullen
- Plant Products and Human Nutrition Group, Division of Ecology and Evolutionary Biology, Faculty of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, United Kingdom
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Mullen W, Archeveque MA, Edwards CA, Matsumoto H, Crozier A. Bioavailability and metabolism of orange juice flavanones in humans: impact of a full-fat yogurt. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:11157-11164. [PMID: 19007165 DOI: 10.1021/jf801974v] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The bioavailability of dietary phytochemicals may be influenced by the food matrix in which they are consumed. In this study the impact of a full-fat yogurt on the bioavailability and metabolism of orange juice flavanones was investigated. Human plasma and urine were collected over a 24 h period after the consumption of 250 mL of orange juice containing a total of 168 micromol of hesperetin-7-O-rutinoside and 12 micromol of naringenin-7-O-rutinoside, with and without 150 mL of full-fat yogurt. The juice also contained 1 g of paracetamol and 5 g of lactulose. HPLC-MS(2) analysis revealed the accumulation of hesperetin-7-O-glucuronide, and an unassigned hesperetin-O-glucuronide metabolite in plasma reached a peak concentration (C(max)) of 924 +/- 224 nmol/L, 4.4 +/- 0.5 h (T(max)) after orange juice ingestion. The T(max) is indicative of absorption in the colon. When the juice was consumed with yogurt, neither the C(max) at 661 +/- 170 nmol/L nor the T(max) at 5.1 +/- 0.4 h were significantly different from those obtained with juice alone. The two hesperetin glucuronides were also excreted in urine along with a third hesperetin-O-glucuronide, two hesperetin-O-glucuronide-O-sulfates, a hesperetin-O-diglucuronide, a naringenin-O-diglucuronide, and, tentatively identified, naringenin-7-O-glucuronide and naringenin-4'-O-glucuronide. This indicates the occurrence of substantial, postabsorption, phase II metabolism prior to urinary excretion. The quantity of flavanone metabolites excreted 0-5 h after orange juice ingestion was significantly reduced by yogurt, but over the full 0-24 h urine collection period, the amounts excreted, corresponding to ca. 7.0% of intake, were not affected by the addition of yogurt to the drink. Nor did yogurt have a significant effect on gastric emptying, as determined by plasma paracetamol levels, or on the mouth to cecum transit time of the head of the meal, assessed by measurement of lactulose-derived breath hydrogen. There is also a discussion of the merits of studies of the absorption and metabolism of flavanones based on direct analysis of metabolites by HPLC-MS and the more traditional indirect approach where samples are treated with a mollusc glucuronidase/sulfatase preparation prior to HPLC analysis of the released aglycones.
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Urpi-Sarda M, Morand C, Besson C, Kraft G, Viala D, Scalbert A, Besle JM, Manach C. Tissue distribution of isoflavones in ewes after consumption of red clover silage. Arch Biochem Biophys 2008; 476:205-10. [PMID: 18513488 DOI: 10.1016/j.abb.2008.05.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2008] [Revised: 05/01/2008] [Accepted: 05/05/2008] [Indexed: 11/30/2022]
Abstract
When discovered in the 50's, isoflavones were suspected to provoke infertility syndrome in sheep grazing on clover. Many others effects of these phytoestrogens have been documented afterwards. To determine the distribution of isoflavone metabolites in ewe tissues and look for a link with their physiological impact, two ewes were fed a diet containing 50% red clover silage (variety Pawera) for one month with a daily intake of 157.6 mg/kg bw of total isoflavones. Only aglycones were fed due to the fermentation stage of the silage. At the sacrifice, isoflavone metabolites and aglycones were analyzed in blood, liver, kidney, lung, heart, muscle, ovaries, uterus, mammary glands, suprarenal glands, thymus, aorta, thyroid, pituitary gland, cerebellum, olfactory lobes, and brain hemispheres using HPLC-Coularray and LC-MS-MS. The major compounds recovered in tissues were equol and daidzein, present as glucuronides. Kidney concentrations were 10-fold higher than in other tissues. Penetration in brain was very limited. Reproductive organs contained higher concentrations of isoflavones than heart, muscle, or thymus. Distribution of isoflavones in ewe tissues is unequal and may reflect specific impact in some target tissues.
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Affiliation(s)
- Mireia Urpi-Sarda
- Nutrition and Food Science Department, XaRTA, Pharmacy Faculty, University of Barcelona, 08028 Barcelona, Spain
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Seeram NP, Aronson WJ, Zhang Y, Henning SM, Moro A, Lee RP, Sartippour M, Harris DM, Rettig M, Suchard MA, Pantuck AJ, Belldegrun A, Heber D. Pomegranate ellagitannin-derived metabolites inhibit prostate cancer growth and localize to the mouse prostate gland. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2007; 55:7732-7. [PMID: 17722872 DOI: 10.1021/jf071303g] [Citation(s) in RCA: 191] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Our group has shown in a phase II clinical trial that pomegranate juice (PJ) increases prostate specific antigen (PSA) doubling time in prostate cancer (CaP) patients with a rising PSA. Ellagitannins (ETs) are the most abundant polyphenols present in PJ and contribute greatly towards its reported biological properties. On consumption, ETs hydrolyze to release ellagic acid (EA), which is then converted by gut microflora to 3,8-dihydroxy-6H-dibenzo[b, d]pyran-6-one (urolithin A, UA) derivatives. Despite the accumulating knowledge of ET metabolism in animals and humans, there is no available data on the pharmacokinetics and tissue disposition of urolithins. Using a standardized ET-enriched pomegranate extract (PE), we sought to further define the metabolism and tissue distribution of ET metabolites. PE and UA (synthesized in our laboratory) were administered to C57BL/6 wild-type male mice, and metabolite levels in plasma and tissues were determined over 24 h. ET metabolites were concentrated at higher levels in mouse prostate, colon, and intestinal tissues as compared to other tissues after administration of PE or UA. We also evaluated the effects of PE on CaP growth in severe combined immunodeficient (SCID) mice injected subcutaneously with human CaP cells (LAPC-4). PE significantly inhibited LAPC-4 xenograft growth in SCID mice as compared to vehicle control. Finally, EA and several synthesized urolithins were shown to inhibit the growth of human CaP cells in vitro. The chemopreventive potential of pomegranate ETs and localization of their bioactive metabolites in mouse prostate tissue suggest that pomegranate may play a role in CaP treatment and chemoprevention. This warrants future human tissue bioavailability studies and further clinical studies in men with CaP.
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Affiliation(s)
- Navindra P Seeram
- Center for Human Nutrition, Greater Los Angeles VA Medical Center, Los Angeles, California, USA.
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Zhao Y, Wang L, Bao Y, Li C. A sensitive method for the detection and quantification of ginkgo flavonols from plasma. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2007; 21:971-81. [PMID: 17300134 DOI: 10.1002/rcm.2907] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Extracts from Ginkgo biloba leaves (family Ginkgoaceae) have antioxidant and free radical scavenging effects, largely attributed to the flavonols, which are a major class of functional components in ginkgo extracts. In order to facilitate analysis of systemic exposure to ginkgo-derived products in animals and/or humans, we developed a liquid chromatography/tandem mass spectrometry (LC/MS/MS)-based method that is capable of routinely monitoring plasma levels of ginkgo flavonols. We used an initial acidic hydrolysis step to convert the plasma ginkgo flavonol conjugates into their aglycone forms [quercetin (QCT), kaempferol (KMF) and isorhamnetin (ISR)] prior to EtOAc-based extraction and subsequent LC/MS/MS-based analysis. Comparative studies showed that the use of a mobile phase containing an extremely low concentration of HCOOH (0.01 per thousand) dramatically improved the electrospray ionization efficiency of the analytes in the negative ion mode; the efficiencies were approximately 4-, approximately 8- and approximately 20-fold higher for QCT, KMF and ISR, respectively, versus the results obtained using an electrolyte-free mobile phase, or approximately 2-, approximately 3- and approximately 4-fold higher, respectively, versus the results obtained using a mobile phase containing the more commonly utilized concentration of HCOOH (1 per thousand). In addition, use of the low concentration of HCOOH also decreased undesired matrix effects. These favorable effects have been referred to as 'LC-electrolyte effects'. Due to structural differences in the B-ring substituent, different types of precursor-to-product ion pairs (m/z 301 --> 151 for QCT, 285 --> 187 for KMF, and 315 --> 300 for ISR) were used for the selected reaction monitoring of the analytes. In addition, the chromatographic conditions were optimized on the basis of an initial scouting of matrix effects on analyte ionization. Despite the absence of an internal standard, the validation results consistently demonstrated that our bioassay is valid, reproducible, and reliable. The newly developed assay provided lower limits of quantification of 1.3, 1.3 and 0.4 pg on-column for QCT, KMF and ISR, respectively, which is more sensitive than any previously reported method for determining ginkgo flavonols. Finally, the assay suitability was demonstrated in a pilot pharmacokinetic measurement of a pharmaceutical ginkgo product in a beagle dog. This newly developed method should prove useful for wide-scale monitoring of ginkgo flavonol plasma concentrations for both pharmaceutical investigations and clinical applications.
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Affiliation(s)
- Yang Zhao
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China
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Nagarajan S, Stewart BW, Badger TM. Soy isoflavones attenuate human monocyte adhesion to endothelial cell-specific CD54 by inhibiting monocyte CD11a. J Nutr 2006; 136:2384-90. [PMID: 16920859 DOI: 10.1093/jn/136.9.2384] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Soy-based diets have been shown to protect against the development of atherosclerosis; however, the underlying mechanism(s) remain unknown. Interaction between activated monocytes and inflamed endothelial cells is an early event in atherogenesis. Therefore, we examined whether treatment of monocytes with soy phytochemicals could inhibit their adhesion to the endothelial cell-specific protein, CD54, a key factor in monocyte adhesion. Female Sprague-Dawley rats were fed AIN-93G diets containing soy protein isolate or casein. Sera from soy-fed rats inhibited CD54-dependent monocyte adhesion, whereas sera from casein-fed rats did not. To determine whether isoflavones in the sera of soy-fed rats were involved in this inhibition, monocytes were preincubated with soy isoflavones. Isoflavone treatment inhibited monocyte adhesion to CD54 protein, as well as to endothelial cells expressing CD54. Monocyte expression of CD11a, the cognate receptor for CD54, was unaffected by isoflavones. However, binding of the activation epitope-specific antibody mAb24, which binds specifically to the active form of CD11a, was significantly lower in soy isoflavone-treated monocytes than in media-treated cells. These findings suggest that inhibition of CD54-dependent monocyte adhesion by soy isoflavones is mediated in part by affinity regulation of CD11a. Inhibition of monocyte adhesion to endothelial cells by isoflavones resulted in reduced expression of the inflammatory cytokines IL-6 and IL-8. Collectively, these data suggest that the athero-protective effect of soy diets may be mediated by blocking monocyte-endothelial cell interaction.
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Affiliation(s)
- Shanmugam Nagarajan
- Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
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Gu L, House SE, Prior RL, Fang N, Ronis MJJ, Clarkson TB, Wilson ME, Badger TM. Metabolic phenotype of isoflavones differ among female rats, pigs, monkeys, and women. J Nutr 2006; 136:1215-21. [PMID: 16614407 DOI: 10.1093/jn/136.5.1215] [Citation(s) in RCA: 127] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Various physiologic effects of soy food consumption have been attributed to the estrogenic actions of isoflavones. The order of estrogen receptor binding potency of soy-derived isoflavone aglycones is equol > genistein > daidzein, and their conjugates are less potent. Because the metabolic profile may be an important determinant of bioactivity after soy intake, we studied the serum and urine isoflavone concentrations in 3 animal models and compared them with isoflavone profiles in women. Female Sprague-Dawley rats, Hampshire/Duroc Cross pigs, cynomolgus monkeys, and women were fed diets containing soy protein isolate. Isoflavones and their metabolites were measured by LC-MS or electrochemical detection. Equol represented approximately 77 and 52% (molar ratio) of summed serum isoflavones (isoflavones plus metabolites) in rats and cynomolgus monkeys, respectively. Equol was undetectable in pig serum and human plasma, but daidzein and genistein contributed >88% of summed circulating isoflavones. Monkey and rat urine contained high levels of aglycones (>85% and >32%, respectively), whereas pigs and women excreted isoflavone mainly in the form of glucuronides (>80%), with <10% as aglycones. Isoflavones in human plasma were predominantly glucuronides (75%) with 24% as sulfates and <1% as aglycones; in monkey serum, however, 64% of isoflavones were sulfates, 30% glucuronides, and 6% aglycones. Equol was also a major serum metabolite of 6-mo-old rhesus monkeys (80% of summed isoflavones). Thus, there were significant interspecies differences in isoflavone metabolism, and the overall metabolic profile of pigs was closer to that of women than that of rats or monkeys.
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Affiliation(s)
- Liwei Gu
- Arkansas Children's Nutrition Center, Little Rock, AR 72202, USA
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Chen CY, Bakhiet RM. Age decreased steady-state concentrations of genistein in plasma, liver, and skeletal muscle in Sprague-Dawley rats. Mech Ageing Dev 2006; 127:344-8. [PMID: 16420957 DOI: 10.1016/j.mad.2005.12.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2005] [Revised: 09/23/2005] [Accepted: 12/06/2005] [Indexed: 11/24/2022]
Abstract
Soy isoflavones are associated with low incidence of cardiovascular diseases (CVD) and hormone-dependent cancers, but no solid information is available on the relative deposition of isoflavones in the body as a function of age. One-year-old (adult) male Sprague-Dawley rats were fed control diet or one of three high-genistein isoflavone (HGI) diets at a dose of 62, 154, or 308 genistein mg/kg (ppm) diet for 5 weeks; 2-year-old (old) were fed a dose of 154 or 308 ppm. Steady-state genistein concentrations in plasma, liver, and gastrocnemius muscle of the adult rats after 12 h fast revealed a linear dose-dependent manner (P < or = 0.0001). However, there was no such relationship in the old rats. Nevertheless, old rats fed the 308 ppm genistein diet had significantly lower steady-state genistein concentrations in plasma and liver than the adult rats did (P < or = 0.05); but similar genistein concentration in muscle. The results of this study indicate that steady-state genistein concentrations in tissues of adult rats after 12 h fast exhibited a dose-dependent fashion and were diminished in specific tissues by age.
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Affiliation(s)
- Chung-Yen Chen
- Department of Human Nutrition, Foods & Exercise, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
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Ronis MJ, Chen Y, Badeaux J, Laurenzana E, Badger TM. Soy protein isolate induces CYP3A1 and CYP3A2 in prepubertal rats. Exp Biol Med (Maywood) 2006; 231:60-9. [PMID: 16380645 DOI: 10.1177/153537020623100107] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Feeding soy diets has been shown to induce cytochrome P450s in gene family CYP3A in Sprague-Dawley rat liver. We compared expression of CYP3A enzymes on postnatal Day 33 (PND33) rats fed casein or soy protein isolate (SPI+)-based AIN-93G diets continuously from gestational Day 4 through PND33 or the diets were switched on PND15 (n = 3-6 litters) to examine the potential imprinting effects of soy on drug metabolism. In addition rats were fed casein, SPI+, SPI+ stripped of phytochemicals (SPI-), or casein diets supplemented with the soy-associated isoflavones genistein or daidzein from weaning through PND33 to examine the hypothesis that the isoflavones are responsible for CYP3A induction by soy feeding. Feeding SPI either continuously or from weaning induced hepatic CYP3A1 and CYP3A2 mRNA, apoprotein, and CYP3A-dependent testosterone 6beta-hydroxylase activity in liver microsomes 2- to 5-fold (P < 0.05). CYP3A mRNA expression was also elevated 2- to 3-fold in the jejunum of SPI-fed rats (P < 0.05). CYP3A was not induced in livers of rats switched to casein from soy at weaning. Induction of CYP3A1 also did not occur in rats fed SPI-, but CYP3A2 mRNA and apoprotein were induced (P < 0.05) in females fed SPI-. Offspring weaned onto genistein-supplemented diets had no elevation of CYP3A mRNAs or apoproteins. Weaning onto daidzein diets increased CYP3A2 mRNA and apoprotein expression in male rats (P < 0.05). These data suggest that early soy consumption may increase the metabolism of a wide variety of CYP3A substrates, but that soy does not imprint the expression of CYP3A enzymes. Effects on CYP3A1 expression appear to be primarily due to phytochemical components of SPI other than isoflavones. In contrast, consumption of soy protein and daidzein appear to be associated with the induction of CYP3A2.
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Affiliation(s)
- Martin J Ronis
- Arkansas Children's Nutrition Center, Little Rock, AR 72202, USA.
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