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Contador CA, Liu A, Ng MS, Ku YS, Chan SHJ, Lam HM. Contextualized Metabolic Modelling Revealed Factors Affecting Isoflavone Accumulation in Soybean Seeds. PLANT, CELL & ENVIRONMENT 2024. [PMID: 39292176 DOI: 10.1111/pce.15140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 06/05/2024] [Accepted: 08/20/2024] [Indexed: 09/19/2024]
Abstract
Isoflavones, secondary metabolites with numerous health benefits, are predominantly found in legume seeds, especially soybean; however, their contents in domesticated soybean seeds are highly variable. Wild soybeans are known for higher seed isoflavone contents than cultivars. Here we used experimental and modelling approaches on wild soybean (W05) and cultivated soybean (C08) to delineate factors influencing isoflavone accumulation. We found imported nutrients were converted into storage compounds, with isoflavone accumulation in W05 seeds being faster than in C08 ones. The isoflavone accumulation during seed development was simulated using context-specific cotyledon metabolic models of four developmental stages on cultivar C08, and the metabolic burden imposed by increasing biomass was evaluated. Trade-off analyses between biomass and isoflavone suggest that high biomass requirement in cultivars could limit the reallocation of resources for secondary metabolite production. Isoflavone production in mature seeds was also influenced by biomass compositions. Seeds with higher carbohydrate contents favour isoflavone production, while those with highest protein and oil contents had lowest isoflavone contents. Although seeds could synthesize isoflavones on their own, the predicted fluxes from biosynthesis alone were lower than the empirical levels. Shadow price analyses indicated that isoflavone accumulation depended on both intrinsic biosynthesis and direct contribution from the plant.
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Affiliation(s)
- Carolina A Contador
- School of Life Sciences and Centre for Soybean Research of the State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Ailin Liu
- School of Life Sciences and Centre for Soybean Research of the State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Ming-Sin Ng
- School of Life Sciences and Centre for Soybean Research of the State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Yee-Shan Ku
- School of Life Sciences and Centre for Soybean Research of the State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Siu H J Chan
- Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, Colorado, USA
| | - Hon-Ming Lam
- School of Life Sciences and Centre for Soybean Research of the State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
- Institute of Environment, Energy and Sustainability, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
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Hachul H, Hachul de Campos B, Lucena L, Tufik S. Sleep During Menopause. Sleep Med Clin 2023; 18:423-433. [PMID: 38501515 DOI: 10.1016/j.jsmc.2023.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
Postmenopause is defined retrospectively after 12 consecutive months of amenorrhea. It represents the end of the reproductive period and ovarian failure. A decrease in estrogen leads to several changes in the short and long term. Among the early changes, vasomotor symptoms (hot flashes) are particularly common, occurring in about 70% of women. In addition, there are changes in mood, anxiety, depression, and insomnia. Insomnia occurs in almost 60% of postmenopausal women. Psychosocial aspects may also affect sleep. Proper diagnosis may lead to adequate treatment of sleep disturbances during menopause. Hormonal or other complementary therapies can improve sleep quality.
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Affiliation(s)
- Helena Hachul
- Department of Psychobiology, Universidade Federal de Sao Paulo, Sao Paulo, Brazil; Department of Ginecology, Universidade Federal de Sao Paulo, Sao Paulo, Brazil.
| | | | - Leandro Lucena
- Department of Psychobiology, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
| | - Sergio Tufik
- Department of Psychobiology, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
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Messina M, Duncan A, Messina V, Lynch H, Kiel J, Erdman JW. The health effects of soy: A reference guide for health professionals. Front Nutr 2022; 9:970364. [PMID: 36034914 PMCID: PMC9410752 DOI: 10.3389/fnut.2022.970364] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 07/25/2022] [Indexed: 11/22/2022] Open
Abstract
Soy is a hotly debated and widely discussed topic in the field of nutrition. However, health practitioners may be ill-equipped to counsel clients and patients about the use of soyfoods because of the enormous, and often contradictory, amount of research that has been published over the past 30 years. As interest in plant-based diets increases, there will be increased pressure for practitioners to gain a working knowledge of this area. The purpose of this review is to provide concise literature summaries (400-500 words) along with a short perspective on the current state of knowledge of a wide range of topics related to soy, from the cholesterol-lowering effects of soy protein to the impact of isoflavones on breast cancer risk. In addition to the literature summaries, general background information on soyfoods, soy protein, and isoflavones is provided. This analysis can serve as a tool for health professionals to be used when discussing soyfoods with their clients and patients.
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Affiliation(s)
- Mark Messina
- Soy Nutrition Institute Global, Washington, DC, United States
| | - Alison Duncan
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada
| | | | - Heidi Lynch
- Kinesiology Department, Point Loma Nazarene University, San Diego, CA, United States
| | - Jessica Kiel
- Scientific and Clinical Affairs, Medifast Inc., Baltimore, MD, United States
| | - John W. Erdman
- Division of Nutritional Sciences and Beckman Institute, Department of Food Science and Human Nutrition, University of Illinois at Urbana/Champaign, Urbana, IL, United States
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Comparative Study of Natural Antioxidants from Glycine max, Anethum graveolensand Pimpinella anisum Seed and Sprout Extracts Obtained by Ultrasound-Assisted Extraction. SEPARATIONS 2022. [DOI: 10.3390/separations9060152] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The study aimed to evaluate the antioxidant potential of sprout and seed extracts from three species of plants, namely Glycine max (GMsp-sprouts, GMsd-seeds), Anethum graveolens (AGsp-sprouts, AGsd-seeds) and Pimpinella anisum (PAsp-sprouts, PAsd-seeds), which are widely accepted by consumers and have various applications in food flavoring, and also in natural medical treatments in the pharmaceutical industries. These plants are rich in valuable compounds that show a remarkable antioxidant power and are associated with many health benefits. Ethanol extracts were obtained by ultrasound-assisted extraction and they were comparatively evaluated for their in vitro antioxidant properties. The extracts were characterized by HPTLC, HPLC-DAD, total phenol content (TPC), total flavonoid content (TFC) analysis and antioxidant activities with different assays, such as total antioxidant capacity (TAC), 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) radical cation decolorization assay (ABTS), 1,1-diphenyl 1-2-picryl-hydrazyl (DPPH) and iron binding ability of chelators. Our results showed that the sprout and seed extracts of the studied plants exhibited a high content of phytochemicals and promising antioxidant properties. The highest polyphenols content was detected for AGsd (53.02 ± 0.57 mg/g DW), PAsd (48.75 ± 0.34 mg/g DW) and the highest flavonoids content for PAsp (26.84 ± 0.57 mg/g DW). Moreover, the presence of valuable compounds was demonstrated by using HPTLC, FT-IR and HPLC-DAD techniques. In order to have a better understanding of the relationship between the biological properties and the electronic structure, a molecular modelling study of genistein was also conducted. Our approach to the comparative assessment of these three plant species was based on a priori knowledge from literature data; however, this study demonstrated that these plant extracts of seeds and also sprouts are excellent sources of natural antioxidants. Significant additional differences that were found in the phytochemical composition could be exploited in future research for pharmaceutical purposes.
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Inoue Y, Yoshida M, Ezawa T, Tanikawa T, Arce F, See GL, Tomita J, Suzuki M, Oguchi T. Inclusion Complexes of Daidzein with Cyclodextrin-Based Metal-Organic Framework-1 Enhance Its Solubility and Antioxidant Capacity. AAPS PharmSciTech 2021; 23:2. [PMID: 34796406 DOI: 10.1208/s12249-021-02151-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 09/27/2021] [Indexed: 12/26/2022] Open
Abstract
Daidzein, an aglycone-type isoflavone, is useful in the prevention of atherosclerotic cardiovascular diseases. However, the solubility of daidzein remains relatively low even with pharmaceutical interventions (e.g., γ-cyclodextrin inclusion complex). In the present study, daidzein-cyclodextrin-metal organic framework solid dispersion complexes were prepared by the solvent evaporation method. The physicochemical properties of the complex and its effect on the solubility of daidzein were evaluated. The enhancement effect of a cyclodextrin-metal organic framework on the antioxidant properties of daidzein was verified using a diphenyl-picrylhydrazyl radical scavenging test. Powder X-ray diffraction results showed that the characteristic diffraction peaks of daidzein and cyclodextrin-metal organic framework disappeared and new peaks (2θ = 7.1°, 16.5°) were observed. FT-IR measurements showed that the peak derived from the carbonyl group of daidzein shifted to the lower wavenumber. NOESY 1H-1H NMR showed cross peaks at the proton on the resorcinol side of daidzein and the proton (H-5, H-6) in a cyclodextrin-metal organic framework. Dissolution rate of daidzein at 5 min in distilled water was 0.06% for daidzein alone while the daidzein inclusion complex was about 100%. When fasted state simulated intestinal fluid was used, the dissolution rate of the daidzein complex was about 71% compared with that of daidzein alone (~ 3.0%) at 5 min. The daidzein inclusion complex improved the antioxidant capacity to ~ 1.3 times (17.8 µg/mL) compared to the IC50 of daidzein alone (22.9 µg/mL). Preparations of cyclodextrin-metal organic framework inclusion complexes will be a platform in developing pharmaceutical formulations to enhance the bioavailability and activity of drugs.
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Inoue Y, Osada M, Murata I, Kobata K, Kanamoto I. Evaluation of Solubility Characteristics of a Hybrid Complex of Components of Soy. ACS OMEGA 2019; 4:8632-8640. [PMID: 31459952 PMCID: PMC6648504 DOI: 10.1021/acsomega.9b00733] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Accepted: 05/07/2019] [Indexed: 05/26/2023]
Abstract
The purpose of this study was to evaluate the solubilities and physicochemical properties of solid dispersions of daidzein (DDZ) and genistein (GST) (the major isoflavones in soybeans) in γ-cyclodextrin (γCD). Dispersions were prepared in distilled water using a three-dimensional ball mill (3DGMw). Phase solubility diagrams confirmed that DDZ/γCD and GST/γCD formed AL type inclusion complexes with a molar ratio of 1:1. A new peak due to inclusion complexes was observed in the results of powder X-ray diffraction (3DGMw(DDZ/γCD = 1:1) and 3DGMw(GST/γCD = 1:1)). Dissolution tests using distilled water found that solubilities of 3DGMw(DDZ/γCD = 1:1) and 3DGMw(GST/γCD = 1:1) were approximately 37- and 51-fold higher, respectively, than the solubilities of pure DDZ and GST. These observations are expected to expand the usefulness of cogrinding of DDZ or GST with γCD using a three-dimensional ball mill.
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Affiliation(s)
- Yutaka Inoue
- Laboratory
of Drug Safety Management, Faculty of Pharmacy and Pharmaceutical
Sciences, Josai University, 1-1 Keyakidai, Sakado-shi, Saitama 3500295, Japan
| | - Mai Osada
- Laboratory
of Drug Safety Management, Faculty of Pharmacy and Pharmaceutical
Sciences, Josai University, 1-1 Keyakidai, Sakado-shi, Saitama 3500295, Japan
| | - Isamu Murata
- Laboratory
of Drug Safety Management, Faculty of Pharmacy and Pharmaceutical
Sciences, Josai University, 1-1 Keyakidai, Sakado-shi, Saitama 3500295, Japan
| | - Kenji Kobata
- Laboratory
of Functional Food Science, Faculty of Pharmacy and Pharmaceutical
Sciences, Josai University, 1-1 Keyakidai, Sakado-shi, Saitama, 3500295, Japan
| | - Ikuo Kanamoto
- Laboratory
of Drug Safety Management, Faculty of Pharmacy and Pharmaceutical
Sciences, Josai University, 1-1 Keyakidai, Sakado-shi, Saitama 3500295, Japan
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Daily JW, Ko BS, Ryuk J, Liu M, Zhang W, Park S. Equol Decreases Hot Flashes in Postmenopausal Women: A Systematic Review and Meta-Analysis of Randomized Clinical Trials. J Med Food 2019; 22:127-139. [PMID: 30592686 DOI: 10.1089/jmf.2018.4265] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Soy isoflavones may benefit some, but not all, menopausal women, and the ability of the women to produce equol may be the major determinant of effectiveness. We assessed the efficacy of soy isoflavones and equol for alleviating menopausal symptoms, especially vasomotor symptoms, in postmenopausal women who were equol producers and nonproducers by using systematic review and meta-analysis of randomized clinical trials (RCTs). We searched 12 English, Korean, and Chinese language scientific and medical databases. We selected all available RCTs that assessed the effect of equol, either equol itself or soy isoflavone in equol producers, on menopausal symptoms in peri- or postmenopausal women. The primary outcome was the effect on hot flashes. The severity of hot flashes was determined by the scores, and sensitivity and risk of bias analyses were conducted. Other outcomes of the review, but not meta-analysis, included depression and adverse events. Six studies (779 total subjects) met all criteria for the systematic review, 5 of those could be included in the meta-analysis (728 total subjects). Two studies included in the meta-analysis reported no statistically significant benefits of equol; the other three did report significant benefits of equol. Meta-analysis revealed a significant benefit of equol for lowering hot flash scores and revealed a generally low risk of bias. In conclusion, this study found that supplementing equol to equol nonproducers significantly lowered the incidence and/or severity of hot flashes in menopausal women.
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Affiliation(s)
- James W Daily
- 1 Department of R&D, Daily Manufacturing, Inc. , Rockwell, North Carolina, USA
| | - Byoung-Seob Ko
- 2 Korean Medicine Convergence Research Division, Korea Institute of Oriental Medicine , Daejeon, Korea
| | - Jina Ryuk
- 2 Korean Medicine Convergence Research Division, Korea Institute of Oriental Medicine , Daejeon, Korea
| | - Meiling Liu
- 3 Department of Food and Nutrition, Institute of Basic Science, Obesity/Diabetes Research Center, Hoseo University , Asan, South Korea
| | - Weijun Zhang
- 3 Department of Food and Nutrition, Institute of Basic Science, Obesity/Diabetes Research Center, Hoseo University , Asan, South Korea
| | - Sunmin Park
- 3 Department of Food and Nutrition, Institute of Basic Science, Obesity/Diabetes Research Center, Hoseo University , Asan, South Korea
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Swart AC, Johannes ID, Sathyapalan T, Atkin SL. The Effect of Soy Isoflavones on Steroid Metabolism. Front Endocrinol (Lausanne) 2019; 10:229. [PMID: 31031706 PMCID: PMC6470182 DOI: 10.3389/fendo.2019.00229] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Accepted: 03/21/2019] [Indexed: 12/30/2022] Open
Abstract
Objective: This study is a post-hoc analysis of steroid hormones before and after administration of pharmacological doses of soy isoflavones in a large cohort of men and women from two independent studies. Isoflavones are reported to inhibit mineralo- and glucocorticoid hormone production as well as reproductive steroids in vivo and in vitro. We focused on cytochrome P450 17α-hydroxylase (CYP17A1) which catalyses the production of dehydroepiandrosterone (DHEA), in the androgen biosynthesis pathway to elucidate effects on sex steroids in vitro. Design and Setting: Effects of soy isoflavones on steroid levels in two studies comprising 400 patients were examined: 200 men (study 1; 3 months duration) and 200 postmenopausal women (study 2; 6 months duration), randomized to consume 15 g soy protein with 66 mg isoflavones (SPI) or 15 g soy protein alone without isoflavones (SP) daily. Effects of genistein and daidzein on steroid metabolism were determined in vitro, in HEK293 cells expressing CYP17A1 and in the human adrenocortical carcinoma H295R cell model. Results: SPI decreased serum dehydroepiandrosterone sulfate (DHEAS) levels in both men and women (P < 0.01), with decreased androstenedione (A4) (P < 0.01) in women not observed in men (P < 0.86). Cortisol, cortisone, 11-deoxycortisol, aldosterone, testosterone (T), or estradiol (E2) levels were unchanged. The dual hydroxylase and lyase activity of CYP17A1, which catalyses the biosynthesis of androgen precursors, and 3β-hydroxysteroid dehydrogenase (3βHSD2) were investigated in vitro. In transiently transfected HEK293 cells, only the lyase activity was inhibited by both genistein, 20% (P < 0.001) and daidzein, 58% (P < 0.0001). In forskolin-stimulated H295R cells DHEA production was decreased by daidzein (P < 0.05) and genistein, confirming inhibition of the lyase activity by the isoflavones. Conclusion: In Vivo clinical data suggested inhibition of CYP17A1 17,20 lyase within the adrenal in men and within the ovary and adrenal in females. This was confirmed in vitro with inhibition of the lyase activity by both genistein and daidzein. In addition, 3βHSD2 was inhibited perhaps accounting for decreased A4 levels observed in females. The decreased DHEAS and A4 levels together with the inhibition of the 17,20 lyase activity of CYP17A1, may impact production of androgens in clinical conditions associated with androgen excess. ISRCTN number: ISRCTN55827330 ISRCTN number: ISRCTN 90604927.
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Affiliation(s)
- Amanda C. Swart
- Department of Biochemistry, Stellenbosch University, Stellenbosch, South Africa
| | - Inge D. Johannes
- Department of Biochemistry, Stellenbosch University, Stellenbosch, South Africa
| | - Thozhukat Sathyapalan
- Academic Diabetes, Endocrinology and Metabolism, University of Hull, Hull, United Kingdom
| | - Stephen L. Atkin
- Research Department, Weill Cornell Medical College Qatar, Doha, Qatar
- *Correspondence: Stephen L. Atkin
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Imhof M, Gocan A, Imhof M, Schmidt M. Soy germ extract alleviates menopausal hot flushes: placebo-controlled double-blind trial. Eur J Clin Nutr 2018; 72:961-970. [PMID: 29849181 PMCID: PMC6035149 DOI: 10.1038/s41430-018-0173-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 03/07/2018] [Accepted: 04/03/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND/OBJECTIVES A double-blind, placebo-controlled study was performed to assess the potency of a soy germ preparation for the alleviation of menopausal hot flushes. SUBJECTS/METHODS Caucasian women with at least seven hot flushes daily were treated with soy germ extract (100 mg isoflavone glycosides) daily or with placebo for 12 weeks, followed by 12 weeks of open treatment with soy. Outcome parameters were the number of hot flushes and the evaluation of the Greene Climacteric Scale. RESULTS A total of 192 women were included. As the hot flush diaries from one study centre were lost, the assessment of hot flushes was based on 136 participants (soy: 54 women; placebo: 82 women). After 12 weeks, 180 women were available for the analysis of Greene Scale and safety (soy and placebo: each 90 women). Hot flushes were reduced by 43.3% (-3.5 hot flushes) with soy and by 30.8% with placebo (-2.6; p < 0.001). After the open treatment phase with soy, both original groups showed a reduction of 68% of hot flushes. A subgroup analysis showed better effects for soy when symptoms were classified as "severe" at baseline. After 12 weeks of double-blind treatment, there was an improvement from baseline values of 71 and 78% with soy with the items "hot flushes" and "sweating", compared with 24% for both items with placebo. Hormonal safety parameters remained uninfluenced. CONCLUSIONS Soy germ extract with 100 mg of isoflavone glycosides was shown to modestly, but significantly reduce menopausal hot flushes.
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Affiliation(s)
- Martin Imhof
- Department of Gynecology and Obstetrics, Univ.-Doz. Dr. med. Martin Imhof, Landesklinikum Weinviertel, Wiener Ring 3-5, A-2100, Korneuburg, Austria
| | - Anca Gocan
- Dr. med. Anca Gocan, Ärztezentrum Rahlgasse, Rahlgasse 1/12, A-1060, Wien, Austria
| | - Marianne Imhof
- Dr. Marianne Imhof, Life Research Technologies GmbH, Schönlanterngasse 11/13, A-1010, Wien, Austria
| | - Mathias Schmidt
- Dr. Mathias Schmidt, Herbresearch Germany, Wartbergweg 15, 86874, Mattsies, Germany.
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Abshirini M, Siassi F, Koohdani F, Qorbani M, Khosravi S, Hedayati M, Aslani Z, Soleymani M, Sotoudeh G. Dietary total antioxidant capacity is inversely related to menopausal symptoms: a cross-sectional study among Iranian postmenopausal women. Nutrition 2018; 55-56:161-167. [PMID: 30086485 DOI: 10.1016/j.nut.2018.04.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 04/12/2018] [Accepted: 04/21/2018] [Indexed: 12/01/2022]
Abstract
OBJECTIVE The aim of this study was to assess the association between dietary total antioxidant capacity (DTAC) and menopausal symptoms (MS) in postmenopausal middle-aged women. METHODS A cross-sectional study was conducted with 400 postmenopausal women who referred to municipality health houses and health centers in south Tehran, Iran. Sociodemographic data and anthropometric measures such as body weight, height, and waist circumference were determined. Dietary intake was assessed using a 147-item validated food frequency questionnaire. Energy-adjusted DTAC was calculated using the US Department of Agriculture database. Individual MS was measured by the Menopause Rating Scale questionnaire. RESULTS Multivariable linear regression analyses indicated that DTAC was negatively associated with total Menopause Rating Scale score, somatic and psychological score, which was independent of confounding variables such as age, education, waist circumference, total physical activity, dietary intake of fiber, tea and coffee intake, total energy intake, and dietary supplement use (P < 0.001). Additionally, in logistic regression, a negative association between MS and DTAC was observed, which was independent of confounding variables (Ptrend = 0.002). Logistic regression for each symptom indicated that higher DTAC was associated with reduction in hot flashes and sweating, sleep problems, anxiety, exhaustion, and difficulty concentrating. However, a significant positive association was observed between DTAC and sexual problems. CONCLUSION DTAC is inversely associated with MS, which could be of particular significance for somatic and psychological symptoms. These findings indicate that DTAC could be an important basis for developing an effective dietary measure for reducing MS.
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Affiliation(s)
- Maryam Abshirini
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.
| | - Fereydoun Siassi
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Fariba Koohdani
- Department of Cellular, Molecular Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Mostafa Qorbani
- Non-communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran
| | - Shahla Khosravi
- Department of Social Medicine, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehdi Hedayati
- Cellular and Molecular Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Zahra Aslani
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahshid Soleymani
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Gity Sotoudeh
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.
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Nomura SJO, Hwang YT, Gomez SL, Fung TT, Yeh SL, Dash C, Allen L, Philips S, Hilakivi-Clarke L, Zheng YL, Wang JHY. Dietary intake of soy and cruciferous vegetables and treatment-related symptoms in Chinese-American and non-Hispanic White breast cancer survivors. Breast Cancer Res Treat 2018; 168:467-479. [PMID: 29230660 PMCID: PMC5928523 DOI: 10.1007/s10549-017-4578-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 11/14/2017] [Indexed: 01/07/2023]
Abstract
PURPOSE This project was undertaken to examine the association between dietary intake of soy or cruciferous vegetables and breast cancer treatment-related symptoms among Chinese-American (CA) and Non-Hispanic White (NHW) breast cancer survivors. METHODS This cross-sectional study included 192 CA and 173 NHW female breast cancer survivors (stages 0-III, diagnosed between 2006 and 2012) recruited from two California cancer registries, who had completed primary treatment. Patient-reported data on treatment-related symptoms and potential covariates were collected via telephone interviews. Dietary data were ascertained by mailed questionnaires. The outcomes evaluated were menopausal symptoms (hot flashes, night sweats, vaginal dryness, vaginal discharge), joint problems, fatigue, hair thinning/loss, and memory problems. Associations between soy and cruciferous vegetables and symptoms were assessed using logistic regression. Analyses were further stratified by race/ethnicity and endocrine therapy usage (non-user, tamoxifen, aromatase inhibitors). RESULTS Soy food and cruciferous vegetable intake ranged from no intake to 431 and 865 g/day, respectively, and was higher in CA survivors. Higher soy food intake was associated with lower odds of menopausal symptoms (≥ 24.0 vs. 0 g/day, OR 0.51, 95% CI 0.25, 1.03), and fatigue (≥ 24.0 vs. 0 g/day, OR 0.43, 95% CI 0.22, 0.84). However, when stratified by race/ethnicity, associations were statistically significant in NHW survivors only. Compared with low intake, higher cruciferous vegetable intake was associated with lower odds of experiencing menopausal symptoms (≥ 70.8 vs. < 33.0 g/day, OR 0.50, 95% CI 0.25, 0.97) in the overall population. CONCLUSIONS In this population of breast cancer survivors, higher soy and cruciferous vegetable intake was associated with less treatment-related menopausal symptoms and fatigue.
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Affiliation(s)
- Sarah J O Nomura
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, 3800 Reservoir Rd NW, Washington, D.C., 20057, USA
| | - Yi-Ting Hwang
- Department of Statistics, National Taipei University, Taipei, Taiwan
| | | | - Teresa T Fung
- Department of Nutrition, Simmons College, Boston, MA, USA
- Department of Nutrition, Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - Shu-Lan Yeh
- Department of Nutrition, Chang Shan Medical University, Taichung, Taiwan
| | - Chiranjeev Dash
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, 3800 Reservoir Rd NW, Washington, D.C., 20057, USA
| | - Laura Allen
- Cancer Prevention Institute of California, Fremont, CA, USA
| | - Serena Philips
- Milken Institute School of Public Health, George Washington University, Washington, D.C., 20052, USA
| | - Leena Hilakivi-Clarke
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, 3800 Reservoir Rd NW, Washington, D.C., 20057, USA
| | - Yun-Ling Zheng
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, 3800 Reservoir Rd NW, Washington, D.C., 20057, USA
| | - Judy Huei-Yu Wang
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, 3800 Reservoir Rd NW, Washington, D.C., 20057, USA.
- , 3300 Whitehaven Street, NW, Suite 4100, Washington, D.C., 20007, USA.
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Sathyapalan T, Dawson AJ, Rigby AS, Thatcher NJ, Kilpatrick ES, Atkin SL. The Effect of Phytoestrogen on Thyroid in Subclinical Hypothyroidism: Randomized, Double Blind, Crossover Study. Front Endocrinol (Lausanne) 2018; 9:531. [PMID: 30254609 PMCID: PMC6141627 DOI: 10.3389/fendo.2018.00531] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 08/22/2018] [Indexed: 12/13/2022] Open
Abstract
Objective: Soy phytoestrogens are suggested to impair thyroid function but the effects of pharmacological doses of soy phytoestrogens are unknown; therefore, this study was performed to determine the effect of high dose soy phytoestrogens (66 mg) on thyroid function in subclinical hypothyroidism. Design and setting: Randomized, double-blind, crossover study. Participants: Forty four patients with subclinical hypothyroidism. Intervention: Participants were randomly allocated to either 66 mg phytoestrogen with 30 g soy protein (active) or 0 mg phytoestrogen with 30 g soy protein (placebo) supplementation for 8 weeks, washed out for 8 weeks and then crossed over for another 8 week period. Main outcome measures: The primary outcome was progression to overt hypothyroidism with the secondary outcome measures were changes in thyroid function tests. Results: Two patients in this trial progressed into overt hypothyroidism after high dose phytoestrogen supplementation. TSH, free thyroxine and triiodothyronine did not differ between groups. Conclusion: A pharmacological dose of 66 mg of soy phytoestrogens did not increase the overt thyroid failure rate or alter thyroid function tests in patients with subclinical hypothyroidism.
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Affiliation(s)
- Thozhukat Sathyapalan
- Academic Diabetes, Endocrinology and Metabolism, Hull York Medical School, University of Hull, Hull, United Kingdom
| | - Alison J Dawson
- Bradford Teaching Hospital NHS Foundation Trust, Bradford, United Kingdom
| | - Alan S Rigby
- Hull York Medical School, University of Hull, Hull, United Kingdom
| | | | - Eric S Kilpatrick
- Department of Clinical Chemistry, Sidra Medical and Research Center, Doha, Qatar
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Sathyapalan T, Köhrle J, Rijntjes E, Rigby AS, Dargham SR, Kilpatrick ES, Atkin SL. The Effect of High Dose Isoflavone Supplementation on Serum Reverse T 3 in Euthyroid Men With Type 2 Diabetes and Post-menopausal Women. Front Endocrinol (Lausanne) 2018; 9:698. [PMID: 30524380 PMCID: PMC6262038 DOI: 10.3389/fendo.2018.00698] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Accepted: 11/06/2018] [Indexed: 11/21/2022] Open
Abstract
Background: The health benefits of soy are widely reported but there are queries on the effect of soy isoflavones on thyroid function and the underlying mechanism of action. Materials and Methods: We examined the effect of soy isoflavones on reverse tri-iodothyronine (or 3,3',5'-tri-iodothyronine; rT3) in two studies comprising 400 patients: 200 men (study 1; 3 months) and 200 post-menopausal women (study 2; 6 months) who were randomized to consume 15 g soy protein with 66 mg of isoflavones (SPI) daily, or 15 g soy protein alone without isoflavones (SP) daily. Results: SPI supplementation increased rT3 serum concentration in both men 0.41 (0.12) vs. 0.45 (0.14) nmol/L and women 0.33 (0.12) vs. 0.37 (0.09) nmol/L at 3 months compared to SP that was not seen at 6 months. Thyroid stimulating hormone (TSH) serum concentrations increased while free thyroxine (fT4) concentrations decreased with 3 months of SPI compared to SP supplementation for both men and women. rT3 correlated with TSH in both studies (p = 0.03) but not with either fT3 or fT4. fT3 levels did not differ between the SPI and SP preparations. Conclusion: Soy isoflavones transiently increased rT3 levels within 3 months though reverted to baseline at 6 months. The mechanism for this would be either rT3 degrading deiodinase 1 and/or deiodinase 2 activities are transiently inhibited at 3 months, or inhibition of deiodinase 3, which generates rT3 from T4 is induced at 6 months. These changes were mirrored in the TSH concentrations, suggesting that short-term high dose isoflavone transiently impairs thyroid function in the first 3 months and may impact on general health during this period. ISRCTN Registry: ISRCTN 90604927; ISRCTN34051237.
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Affiliation(s)
- Thozhukat Sathyapalan
- Academic Diabetes, Endocrinology and Metabolism, Hull York Medical School, University of Hull, Hull, United Kingdom
| | - Josef Köhrle
- Institut für Experimentelle Endokrinologie, Charité-Universitätsmedizin Berlin, Berlin Institute of Health, CVK, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Eddy Rijntjes
- Institut für Experimentelle Endokrinologie, Charité-Universitätsmedizin Berlin, Berlin Institute of Health, CVK, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Alan S. Rigby
- Academic Diabetes, Endocrinology and Metabolism, Hull York Medical School, University of Hull, Hull, United Kingdom
| | | | - Eric S. Kilpatrick
- Department of Clinical Chemistry, Sidra Medical and Research Center, Doha, Qatar
| | - Stephen L. Atkin
- Weill Cornell Medical College Qatar, Doha, Qatar
- *Correspondence: Stephen L. Atkin
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Sathyapalan T, Javed Z, Rigby AS, Kilpatrick ES, Atkin SL. Soy Protein Improves Cardiovascular Risk in Subclinical Hypothyroidism: A Randomized Double-Blinded Crossover Study. J Endocr Soc 2017; 1:423-430. [PMID: 29264497 PMCID: PMC5686670 DOI: 10.1210/js.2016-1068] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 03/27/2017] [Indexed: 11/19/2022] Open
Abstract
Background: Soy protein with isoflavones appears to have an adverse effect on thyroid function, but it is not known whether it is the protein or isoflavone component that is deleterious. The effect of isoflavone-free soy on thyroid function was determined in patients with subclinical hypothyroidism, with a secondary aim of assessing its effect on cardiovascular risk indices. Methods: This was a randomized, double-blind, crossover study involving 80 patients with subclinical (compensated) hypothyroidism. Patients were randomly assigned to either isolated soy (isoflavone-free) protein (SP) or casein protein (CP) supplementation for 8 weeks, washed out for 8 weeks, and then crossed over for a further 8-week period. Results: Thyroid function was unaffected by either a SP or CP. There were significant decreases in fasting glucose (4.7 ± 0.6 vs 5.5 ± 1.4, P < 0.01), insulin resistance (3.3 ± 3.0 vs 3.8 ± 3.4, P = 0.05), total cholesterol (4.4 ± 0.9 vs 5.3 ± 1.2, P < 0.01), triglycerides (0.9 ± 0.5 vs 1.7 ± 0.9, P < 0.1), and highly sensitive C-reactive protein (hsCRP; 0.8 ± 0.7 vs 2.6 ± 2.8, P < 0.01) in the SP group compared with the CP group. Blood pressure, low-density lipoprotein, and high-density lipoprotein remained unchanged in both groups. Conclusion: SP alone had no effect on thyroid function in patients with subclinical hypothyroidism and resulted in a significant reduction in fasting glucose, insulin resistance, total cholesterol, triglycerides, and hsCRP compared with CP.
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Affiliation(s)
- Thozhukat Sathyapalan
- Department of Academic Endocrinology, Diabetes, and Metabolism, Hull York Medical School, Hull HU3 2JZ, United Kingdom
| | - Zeeshan Javed
- Department of Academic Endocrinology, Diabetes, and Metabolism, Hull York Medical School, Hull HU3 2JZ, United Kingdom
| | - Alan S Rigby
- Department of Academic Cardiology, University of Hull, Hull HU3 2JZ, United Kingdom
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Oh SM, Kim HR, Park YJ, Lee YH, Chung KH. Ethanolic extract of dandelion (Taraxacum mongolicum) induces estrogenic activity in MCF-7 cells and immature rats. Chin J Nat Med 2016; 13:808-814. [PMID: 26614455 DOI: 10.1016/s1875-5364(15)30084-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Indexed: 10/22/2022]
Abstract
Plants of the genus Taraxacum, commonly known as dandelions, are used to treat breast cancer in traditional folk medicine. However, their use has mainly been based on empirical findings without sufficient scientific evidence. Therefore, we hypothesized that dandelions would behave as a Selective estrogen receptor modulator (SERM) and be effective as hormone replacement therapy (HRT) in the postmenopausal women. In the present study, in vitro assay systems, including cell proliferation assay, reporter gene assay, and RT-PCR to evaluate the mRNA expression of estrogen-related genes (pS2 and progesterone receptor, PR), were performed in human breast cancer cells. Dandelion ethanol extract (DEE) significantly increased cell proliferation and estrogen response element (ERE)-driven luciferase activity. DEE significantly induced the expression of estrogen related genes such as pS2 and PR, which was inhibited by tamoxifen at 1 μmol·L(-1). These results indicated that DEE could induce estrogenic activities mediated by a classical estrogen receptor pathway. In addition, immature rat uterotrophic assay was carried out to identify estrogenic activity of DEE in vivo. The lowest concentration of DEE slightly increased the uterine wet weight, but there was no significant effect with the highest concentration of DEE. The results demonstrate the potential estrogenic activities of DEE, providing scientific evidence supporting their use in traditional medicine.
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Affiliation(s)
- Seung Min Oh
- Fusion Technology Laboratory, Hoseo University, Hoseoro79 bungil20, Baebang, Asan, Chungcheong Nam-do, 336-795, Korea
| | - Ha Ryong Kim
- School of Pharmacy, Sungkyunkwan University, 2066, seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, 440-746, Korea
| | - Yong Joo Park
- School of Pharmacy, Sungkyunkwan University, 2066, seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, 440-746, Korea
| | - Yong Hwa Lee
- Fusion Technology Laboratory, Hoseo University, Hoseoro79 bungil20, Baebang, Asan, Chungcheong Nam-do, 336-795, Korea
| | - Kyu Hyuck Chung
- School of Pharmacy, Sungkyunkwan University, 2066, seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, 440-746, Korea.
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Schmidt M, Arjomand-Wölkart K, Birkhäuser MH, Genazzani AR, Gruber DM, Huber J, Kölbl H, Kreft S, Leodolter S, Linsberger D, Metka M, Simoncini T, Vrabic Dezman L. Consensus: soy isoflavones as a first-line approach to the treatment of menopausal vasomotor complaints. Gynecol Endocrinol 2016; 32:427-30. [PMID: 26943176 DOI: 10.3109/09513590.2016.1152240] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 02/05/2016] [Indexed: 11/13/2022] Open
Abstract
The association between an increased uptake of isoflavones and a reduced frequency of menopausal hot flushes was first described in 1992, based on a lower incidence of hot flushes in countries with a high consumption of soy. Since then, numerous clinical trials with various sources of isoflavones including soy and red clover have been presented, with practically all of the studies with adequate design delivering an outcome in favour of isoflavone supplementation. An in-depth risk assessment (EFSA 2015) concludes that the amply available human data does not indicate any suspected harmful effects from a potential interaction of isoflavones with hormone-sensitive tissues in the mammary gland, the uterus and the thyroid gland. Safety was ascertained with long-term intake of up to 150 mg isoflavones per day ingested for the duration of at least 3 years. Moreover, high isoflavone intake was found to have preventive effects with respect to breast cancer. Clinical findings indicate potential benefits of isoflavone exposure even during breast cancer treatment with tamoxifen or anastrozole.
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Affiliation(s)
- Mathias Schmidt
- a International Society for Phytosciences , Mattsies , Germany
| | - Karin Arjomand-Wölkart
- b Institut Für Pharmazeutische Wissenschaften, Karl-Franzens-Universität Graz , Graz , Austria
| | - Martin H Birkhäuser
- c Gynaecological Endocrinonoly and Reproductive Medicine, Medical Faculty, University of Berne , Basel , Switzerland
| | - Andrea R Genazzani
- d Department of Gynaecology and Obstetrics , European Society of Gynecology, University of Pisa , Pisa , Italy
| | - Doris M Gruber
- e 1st Department of Gynaeology and Obstetrics, University of Vienna , Wien , Austria
| | - J Huber
- e 1st Department of Gynaeology and Obstetrics, University of Vienna , Wien , Austria
| | - Heinz Kölbl
- e 1st Department of Gynaeology and Obstetrics, University of Vienna , Wien , Austria
| | - Samo Kreft
- f Chair of Pharmacognostic and Phytochemical Laboratory, Faculty of Pharmacy, University of Ljubljana , Ljubljana , Slovenia
| | - Sepp Leodolter
- e 1st Department of Gynaeology and Obstetrics, University of Vienna , Wien , Austria
| | - Doris Linsberger
- e 1st Department of Gynaeology and Obstetrics, University of Vienna , Wien , Austria
| | - Markus Metka
- e 1st Department of Gynaeology and Obstetrics, University of Vienna , Wien , Austria
| | - Tommaso Simoncini
- g Division of Obstetrics and Gynadecology , Department of Clinical and Experimental Medicine, Università Di Pisa , Pisa , Italy , and
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Lawrence SE, Lopetcharat K, Drake M. Preference Mapping of Soymilk with Different U.S. Consumers. J Food Sci 2015; 81:S463-76. [DOI: 10.1111/1750-3841.13182] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2015] [Accepted: 11/11/2015] [Indexed: 11/28/2022]
Affiliation(s)
- S. E. Lawrence
- Dept. of Food, Bioprocessing, and Nutrition Sciences; North Carolina State Univ; Raleigh NC 27695 U.S.A
| | - K. Lopetcharat
- Dept. of Food, Bioprocessing, and Nutrition Sciences; North Carolina State Univ; Raleigh NC 27695 U.S.A
| | - M.A. Drake
- Dept. of Food, Bioprocessing, and Nutrition Sciences; North Carolina State Univ; Raleigh NC 27695 U.S.A
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Short-Term Isoflavone Intervention in the Treatment of Severe Vasomotor Symptoms after Surgical Menopause: A Case Report and Literature Review. Case Rep Obstet Gynecol 2015; 2015:962740. [PMID: 26605099 PMCID: PMC4641951 DOI: 10.1155/2015/962740] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 10/07/2015] [Indexed: 11/27/2022] Open
Abstract
Isoflavones are soy phytoestrogens that potentially exert various favorable effects in postmenopausal women, for example, alleviating vasomotor episodes, attenuating bone loss, and stimulating vaginal epithelial maturation. There has, however, been lack of consensus regarding those therapeutic effects. Most clinical studies of isoflavones have been conducted with women who had undergone natural menopause, but not those who had undergone surgical menopause. This study reports on a 51-year-old woman who presented with severe vasomotor episodes after undergoing a hysterectomy and a bilateral oophorectomy due to hypermenorrhea secondary to myoma uteri. She refused hormone therapy due to fear of adverse drug reactions so was treated with oral soy isoflavones (two capsules twice daily, equivalent to at least 100 mg daily dose) for 8 weeks. The number and severity of hot flushes and her menopause-specific quality of life dramatically improved from baseline values. The serum bone resorption marker (beta C-telopeptide) decreased markedly, while vaginal epithelial maturation improved slightly, suggesting the potential of isoflavones in attenuating bone loss and stimulating vaginal maturation. The intervention did not adversely affect the hormonal profile (FSH, LH, and estradiol) and liver or renal functions. Thus, isoflavones could be an option for women experiencing severe vasomotor episodes after surgical menopause.
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Abstract
Menopause is defined as permanent irreversible cessation of menses brought by decline in ovarian follicular activity. Hormonal alteration results in various physical, psychological, and sexual changes in menopausal women. Associated dermatological problems can be classified as physiological changes, age-related changes, changes due to estrogen deficiency and due to hormone replacement therapy. Dermatosis seen due to estrogen deficiency includes Atrophic Vulvovaginitis, Vulvar Lichen Sclerosus, Dyaesthetic Vulvodynia, Hirsutism, Alopecia, Menopausal Flushing, Keratoderma Climactericum, Vulvovaginal Candidiasis. Dermatologists and gynecologists need to be familiar with the problems of menopausal women, as with increase in life expectancy, women passing through this phase is rising.
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Affiliation(s)
- Pragya A. Nair
- Department of Dermatology and Venereology, Pramukhswami Medical College, Karamsad, Gujarat, India
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Ryo K, Takahashi A, Tamaki Y, Ohnishi-Kameyama M, Inoue H, Saito I. Therapeutic effects of isoflavones on impaired salivary secretion. J Clin Biochem Nutr 2014; 55:168-73. [PMID: 25411521 PMCID: PMC4227830 DOI: 10.3164/jcbn.14-49] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 04/30/2014] [Indexed: 01/15/2023] Open
Abstract
Dry mouth, which is characterized by decreased salivation, has a number of causes; the involvement of estrogen has been suggested as symptoms typically develop in middle-aged females. However, there is a lack of consensus regarding the treatment of this condition. Soy isoflavones, a subgroup of flavonoids, are abundantly found in the soy germ. They are thought to exert a number of effects by specifically binding to estrogen receptors due to their structural similarity to estrogen. Recently, soy isoflavones have been found to exert antioxidant effects, ameliorating disorders caused by reactive oxygen/free radicals. Based on these observations, the effects of soybean isoflavones on impaired salivary secretion were studied in patients with dry mouth. Soy isoflavone aglycones were administered at 25 mg per day to 15 subjects with an average age of 67.9 ± 8.0 years for 2 months, and salivary secretion was analyzed. The results showed a significant improvement based on the saliva flow rate and self-completed questionnaire, thus suggesting the usefulness of isoflavones in improving the symptoms of salivary gland hypofunction.
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Affiliation(s)
- Koufuchi Ryo
- Department of Pathology, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Japan
| | - Ayako Takahashi
- Department of Pathology, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Japan
| | - Yoh Tamaki
- Department of Health and Welfare Services National Institute of Public Health, 2-3-6 Minami, Wako-shi, Saitama 351-0197, Japan
| | - Mayumi Ohnishi-Kameyama
- National Food Research Institute, National Agriculture and Food Research Organization, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan
| | - Hiroko Inoue
- Department of Pathology, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Japan ; Department of Pharmacotherapy, Nihon Pharmaceutical University, 1028 Komuro, Kitaadachigun Inamachi, Saitama 362-0806, Japan
| | - Ichiro Saito
- Department of Pathology, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Japan
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Liu ZM, Ho SC, Woo J, Chen YM, Wong C. Randomized controlled trial of whole soy and isoflavone daidzein on menopausal symptoms in equol-producing Chinese postmenopausal women. Menopause 2014; 21:653-60. [PMID: 24149925 DOI: 10.1097/gme.0000000000000102] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Dietary supplements containing soy or isoflavones are widely used as alternatives to hormone therapy. However, their efficacy is still inconclusive, and limited data on equol producers are available. The aim of this study was to examine the effect of whole soy (soy flour) or purified daidzein (one major soy isoflavone and the precursor of equol) on menopausal symptoms in equol-producing postmenopausal women, a population most likely to benefit from soy intervention. METHODS This is a 6-month parallel-group, double-blind, randomized, placebo-controlled trial. Two hundred seventy equol-producing prehypertensive Chinese postmenopausal women were randomized to one of three treatment groups: 40 g of soy flour (whole soy group), 40 g of low-fat milk powder + 63 mg of daidzein (daidzein group), or 40 g of low-fat milk powder (placebo group) daily, each given as a solid beverage for 6 months. Changes in menopausal symptoms were assessed by a validated and structured symptom checklist at baseline and 6 months. RESULTS Two hundred fifty-three participants completed the study according to protocol. Urinary isoflavones indicated good compliance with the interventions. Baseline menopausal symptoms were comparable among the three study groups. Intention-to-treat analysis indicated that there was no significant difference in the 6-month changes or percent changes in the total number of menopausal symptoms, in the five dimensions of symptoms, and in the frequencies of individual symptoms among the three treatment groups. CONCLUSIONS Whole soy and purified daidzein have no significant effect on alleviation of menopausal symptoms among equol-producing postmenopausal women with prehypertension.
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Affiliation(s)
- Zhao-min Liu
- From the 1Department of Medicine and Therapeutics, and 2Division of Epidemiology, The Jockey Club of the School of Public Health and Primary Care, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR; 3Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, PR China; and 4Center of Research and Promotion of Women's Health, The Jockey Club of the School of Public Health and Primary Care, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR
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Isoflavone and its metabolite equol inhibit the development of 7,12-dimethylbenz(a)anthracene (DMBA)-induced mammary tumours in ovariectomised rats. J Funct Foods 2014. [DOI: 10.1016/j.jff.2013.12.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Kuo HY, Chen SH, Yeh AI. Preparation and physicochemical properties of whole-bean soymilk. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:742-9. [PMID: 24380443 DOI: 10.1021/jf404465w] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Whole-bean soymilk has been prepared by using media-milling. Some characteristics of media-milled soymilk have been determined and compared with filtered soymilk (similar to commercial ones) and whole-bean soymilk prepared by blending. There existed particles in the nano/submicrometer scale in both media-milled and filtered soymilk. The particles in blended soymilk were greater than 1 μm. Media-milled soymilk was the most stable among three samples, even after autoclaving. Solid recovery (98.44 ± 0.16%), viscosity (160.59 ± 4.26 cps), dietary fiber (22.68 ± 0.97% on dry basis), total polyphenol recovery (95.15 ± 7.09%), and isoflavone content (4.42 ± 0.03 mg/g dry solid) of media-milled samples were greater than those of filtered ones. Aglycones, the most bioactive form of isoflavone, in autoclaved media-milled soymilk were more than 2-fold those in autoclaved filtered soymilk. With almost no okara generated, the media-milled soymilk retained fiber in soybeans which would be beneficial to human health.
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Affiliation(s)
- Hsin-Yu Kuo
- Graduate Institute of Food Science and Technology, National Taiwan University , 1 Roosevelt Road, Section 4, Taipei 10617, Taiwan
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Lethaby A, Marjoribanks J, Kronenberg F, Roberts H, Eden J, Brown J. Phytoestrogens for menopausal vasomotor symptoms. Cochrane Database Syst Rev 2013; 2013:CD001395. [PMID: 24323914 PMCID: PMC10247921 DOI: 10.1002/14651858.cd001395.pub4] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Vasomotor symptoms, such as hot flushes and night sweats, are very common during the menopausal transition. Hormone therapy has traditionally been used as a highly effective treatment, but concerns about increased risk of some chronic diseases have markedly increased the interest of women in alternative treatments. Some of the most popular of these treatments are foods or supplements enriched with phytoestrogens-plant-derived chemicals that have estrogenic action. OBJECTIVES To assess the efficacy, safety and acceptability of food products, extracts and dietary supplements containing high levels of phytoestrogens when compared with no treatment, placebo or hormone therapy for the amelioration of vasomotor menopausal symptoms (such as hot flushes and night sweats) in perimenopausal and postmenopausal women. SEARCH METHODS Searches targeted the following electronic databases: the Cochrane Menstrual Disorders and Subfertility Group Specialised Register of randomised trials (29 July 2013), the Cochrane Register of Controlled Trials (CENTRAL; 29 July 2013), MEDLINE (inception to 29 July 2013), EMBASE (inception to 29 July 2013), AMED (1985 to 29 July 2013), PsycINFO (inception to 29 July 2013) and CINAHL (inception to 29 July 2013). Attempts were made to access grey literature by sending letters to pharmaceutical companies and performing searches of ongoing trial registers. Reference lists of included trials were also searched. SELECTION CRITERIA Studies were included if they were randomised, included perimenopausal or postmenopausal participants with vasomotor symptoms (hot flushes or night sweats), lasted at least 12 weeks and provided interventions such as foods or supplements with high levels of phytoestrogens (not combined with other herbal treatments). Trials that included women who had breast cancer or a history of breast cancer were excluded. DATA COLLECTION AND ANALYSIS Selection of trials, extraction of data and assessment of quality were undertaken by at least two review authors. Most trials were too dissimilar for their results to be combined in a meta-analysis, so these findings are provided in narrative 'Summary of results' tables. Studies were grouped into broad categories: dietary soy, soy extracts, red clover extracts, genistein extracts and other types of phytoestrogens. Five trials used Promensil, a red clover extract; results of these trials were combined in a meta-analysis, and summary effect measures were calculated. MAIN RESULTS A total of 43 randomised controlled trials (4,364 participants) were included in this review. Very few trials provided data suitable for inclusion in a meta-analysis. Among the five trials that yielded data assessing the daily frequency of hot flushes suitable for pooling, no significant difference overall was noted in the incidence of hot flushes between participants taking Promensil (a red clover extract) and those given placebo (mean difference (MD) -0.93, 95% confidence interval (CI) -1.95 to 0.10, I(2) = 31%). No evidence indicated a difference in percentage reduction in hot flushes in two trials between Promensil and placebo (MD 20.15, 95% CI -12.08 to 52.38, I(2) = 82%). Four trials that were not combined in meta-analyses suggested that extracts with high (> 30 mg/d) levels of genistein consistently reduced the frequency of hot flushes. Individual results from the remaining trials were compared in broad subgroups such as dietary soy, soy extracts and other types of phytoestrogens that could not be combined. Some of these trials found that phytoestrogen treatments alleviated the frequency and severity of hot flushes and night sweats when compared with placebo, but many trials were small and were determined to be at high risk of bias. A strong placebo effect was noted in most trials, with a reduction in frequency ranging from 1% to 59% with placebo. No indication suggested that discrepant results were due to the amount of isoflavone in the active treatment arm, the severity of vasomotor symptoms or trial quality factors. Also, no evidence indicated that these treatments caused oestrogenic stimulation of the endometrium or the vagina or other adverse effects when used for up to two years. AUTHORS' CONCLUSIONS No conclusive evidence shows that phytoestrogen supplements effectively reduce the frequency or severity of hot flushes and night sweats in perimenopausal or postmenopausal women, although benefits derived from concentrates of genistein should be further investigated.
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Affiliation(s)
- Anne Lethaby
- University of AucklandDepartment of Obstetrics and GynaecologyPrivate Bag 92019AucklandNew Zealand1142
| | - Jane Marjoribanks
- University of AucklandDepartment of Obstetrics and GynaecologyPrivate Bag 92019AucklandNew Zealand1142
| | - Fredi Kronenberg
- College of Physicians & Surgeons, Columbia University in the City of New YorkDepartment of Rehabilitation MedicineBOX 75630 W 168TH STNew YorkUSANY 10027‐6902
| | - Helen Roberts
- University of AucklandDepartment of Obstetrics and GynaecologyPrivate Bag 92019AucklandNew Zealand1142
| | - John Eden
- Royal Hospital for WomenSydney Menopause Centre & Natural Therapies UnitLocked Bag 2000RandwickNSWAustralia2031
| | - Julie Brown
- University of AucklandThe Liggins Institute and Department of Obstetrics and GynaecologyFMHSAucklandNew Zealand
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Ma D, Zhang Y, Yang T, Xue Y, Wang P. Isoflavone intake inhibits the development of 7,12-dimethylbenz(a)anthracene(DMBA)-induced mammary tumors in normal and ovariectomized rats. J Clin Biochem Nutr 2013; 54:31-8. [PMID: 24426188 PMCID: PMC3882481 DOI: 10.3164/jcbn.13-33] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Accepted: 07/04/2013] [Indexed: 11/23/2022] Open
Abstract
To determine the associations between isoflavone (49.72% genistin, 5.32% daidzin, 34.54% glycitin) and breast cancer risk, 150 rats were given 5 mg 7,12-dimethylbenz(a)anthracene and half of them were ovariectomized. Then normal rats and ovariectomized rats were divided into 5 groups: control group, isoflavone high (HI), middle (MI), or low (LI) dose group consuming 100, 500, or 1000 mg isoflavones/kg diet, estrogen group (2.5 mg stilboestrol/kg diet). After 24 weeks, tumor incidences were 73% in control group, 7% in HI, 7% in MI, 27% in LI, and 80% in estrogen group for normal rats; 60% in control group, 13% in HI, 7% in MI, 13% in LI, and 73% in estrogen group for ovariectomized rats. Isoflavone treatment decreased tumor incidence and mean tumor number per rat and increased mean latent period compared with those in control group and estrogen group group significantly (p<0.05). The mRNA and protein expression of estrogen receptor β were significantly higher in isoflavone treatment groups than those in control group group. Moreover, isoflavone treatment significantly decreased 8-hydroxydeoxyguanosine content and increased superoxide dismutase level in normal rats and decreased malondialdehyde concentrations in ovariectomized rats compared with control group. In conclusions, isoflavone intake significantly inhibited the development of premenopausal and postmenopausal mammary tumors.
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Affiliation(s)
- Defu Ma
- Department of Social Medicine and Health Education, School of Public Health, Peking University Health Science Center, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Yumei Zhang
- Department of Nutrition and Food Hygiene, School of Public Health, Peking University Health Science Center, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Titi Yang
- Department of Social Medicine and Health Education, School of Public Health, Peking University Health Science Center, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Yong Xue
- Department of Social Medicine and Health Education, School of Public Health, Peking University Health Science Center, 38 Xueyuan Road, Haidian District, Beijing 100191, China
| | - Peiyu Wang
- Department of Social Medicine and Health Education, School of Public Health, Peking University Health Science Center, 38 Xueyuan Road, Haidian District, Beijing 100191, China
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Vitolins MZ, Griffin L, Tomlinson WV, Vuky J, Adams PT, Moose D, Frizzell B, Lesser GJ, Naughton M, Radford JE, Shaw EG. Randomized trial to assess the impact of venlafaxine and soy protein on hot flashes and quality of life in men with prostate cancer. J Clin Oncol 2013; 31:4092-8. [PMID: 24081940 DOI: 10.1200/jco.2012.48.1432] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
PURPOSE Hot flashes occur in approximately 80% of androgen-deprived men. Few intervention studies have been conducted to relieve hot flashes in men. PATIENTS AND METHODS Eligible androgen-deprived men were randomly assigned to one of four daily regimens (2 × 2 factorial design) for 12 weeks: milk protein powder and placebo pill, venlafaxine and milk protein powder, soy protein powder and placebo pill, or venlafaxine and soy protein powder. The primary end point was hot flash symptom severity score (HFSSS), defined as number of hot flashes times severity. The secondary end point was quality of life (QoL), assessed by using the Functional Assessment of Cancer Therapy-Prostate. RESULTS In all, 120 men age 46 to 91 years participated. Most were white (78%) and overweight or obese (83%). Toxicity was minimal. Neither venlafaxine nor soy protein alone or in combination had a significant effect on HFSSS. Soy protein, but not venlafaxine, improved measures of QoL. CONCLUSION In androgen-deprived men, neither venlafaxine nor soy proved effective in reducing hot flashes. Interventions that appear effective for decreasing hot flashes in women may not always turn out to be effective in men.
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Affiliation(s)
- Mara Z Vitolins
- Mara Z. Vitolins, Leah Griffin, Bart Frizzel, Glenn J. Lesser, Michelle Naughton, and Edward G. Shaw, Wake Forest School of Medicine; Dawn Moose, Novant Health, Winston-Salem; James E. Radford Jr, Hendersonville Hematology/Oncology, Hendersonville, NC; W. Vic Tomlinson, AnMed Health, Anderson, SC; Jacqueline Vuky, Virginia Mason Medical Center, Seattle, WA; and Paul T. Adams, National Surgical Adjuvant Breast and Bowel Project, Genesys Regional Medical Center, Flint, MI
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Yoshiara LY, Madeira TB, Delaroza F, da Silva JB, Ida EI. Optimization of soy isoflavone extraction with different solvents using the simplex-centroid mixture design. Int J Food Sci Nutr 2012; 63:978-86. [PMID: 22621769 DOI: 10.3109/09637486.2012.690026] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The objective of this study was to optimize the extraction of different isoflavone forms (glycosidic, malonyl-glycosidic, aglycone and total) from defatted cotyledon soy flour using the simplex-centroid experimental design with four solvents of varying polarity (water, acetone, ethanol and acetonitrile). The obtained extracts were then analysed by high-performance liquid chromatography. The profile of the different soy isoflavones forms varied with different extractions solvents. Varying the solvent or mixture used, the extraction of different isoflavones was optimized using the centroid-simplex mixture design. The special cubic model best fitted to the four solvents and its combination for soy isoflavones extraction. For glycosidic isoflavones extraction, the polar ternary mixture (water, acetone and acetonitrile) achieved the best extraction; malonyl-glycosidic forms were better extracted with mixtures of water, acetone and ethanol. Aglycone isoflavones, water and acetone mixture were best extracted and total isoflavones, the best solvents were ternary mixture of water, acetone and ethanol.
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Affiliation(s)
- Luciane Yuri Yoshiara
- Department of Food Science and Technology, Universidade Estadual de Londrina, Londrina, Paraná, Brazil
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Scientific Opinion on the substantiation of health claims related to soy isoflavones and maintenance of bone mineral density (ID 1655) and reduction of vasomotor symptoms associated with menopause (ID 1654, 1704, 2140, 3093, 3154, 3590) (further assessmen. EFSA J 2012. [DOI: 10.2903/j.efsa.2012.2847] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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Taku K, Melby MK, Kronenberg F, Kurzer MS, Messina M. Extracted or synthesized soybean isoflavones reduce menopausal hot flash frequency and severity: systematic review and meta-analysis of randomized controlled trials. Menopause 2012; 19:776-90. [PMID: 22433977 DOI: 10.1097/gme.0b013e3182410159] [Citation(s) in RCA: 113] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE This analysis was conducted to determine the efficacy of extracted or synthesized soybean isoflavones in the alleviation of hot flashes in perimenopausal and postmenopausal women. METHODS PubMed and The Cochrane Controlled Clinical Trials Register Database were searched for relevant articles reporting double-blinded randomized controlled trials through December 14, 2010. References within identified articles, as well as peer-reviewed articles that had come to the attention of the authors through other means, were also examined for suitability. This systematic review and meta-analysis, which evaluated the effects of isoflavones on the frequency, severity, or composite score (frequency × severity) of hot flashes compared with placebo was conducted according to Cochrane Handbook guidelines. RESULTS From 277 potentially relevant publications, 19 trials (reported in 20 articles) were included in the systematic review (13 included hot flash frequency; 10, severity; and 3, composite scores), and 17 trials were selected for meta-analyses to clarify the effect of soybean isoflavones on hot flash frequency (13 trials) and severity (9 trials). Meta-analysis revealed that ingestion of soy isoflavones (median, 54 mg; aglycone equivalents) for 6 weeks to 12 months significantly reduced the frequency (combined fixed-effect and random effects model) of hot flashes by 20.6% (95% CI, -28.38 to -12.86; P < 0.00001) compared with placebo (heterogeneity P = 0.0003, I = 67%; random effects model). Meta-analysis also revealed that isoflavones significantly reduced hot flash severity by 26.2% (95% CI: -42.23 to -10.15, P = 0.001) compared with placebo (heterogeneity, P < 0.00001, I = 86%; random effects model). Isoflavone supplements providing more than 18.8 mg of genistein (the median for all studies) were more than twice as potent at reducing hot flash frequency than lower genistein supplements. CONCLUSIONS Soy isoflavone supplements, derived by extraction or chemical synthesis, are significantly more effective than placebo in reducing the frequency and severity of hot flashes. Additional studies are needed to further address the complex array of factors that may affect efficacy, such as dose, isoflavone form, baseline hot flash frequency, and treatment duration.
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Affiliation(s)
- Kyoko Taku
- National Institute of Health and Nutrition, Tokyo, Japan
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Yuan B, Zhen H, Jin Y, Xu L, Jiang X, Sun S, Li C, Xu H. Absorption and plasma disposition of genistin differ from those of genistein in healthy women. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:1428-36. [PMID: 22256777 DOI: 10.1021/jf204421c] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The chemical forms in which isoflavones appear in food or supplements seem to play an important role in their absorption efficiency. However, the influence of the chemical form of isoflavones on their plasma disposition has never been reported, although the metabolites of isoflavones circulating in the blood may have biological activity themselves. The purpose of the study was to investigate the pharmacokinetic profiles of genistein (GEN) and its phase II metabolites in the plasma and urine of healthy young women after multiple doses of pure aglycone and glucoside forms of GEN. Genistein-7-glucuronide (G-7-G), 4'-glucuronide (G-4'-G), 7-sulfate (G-7-S), 4'-sulfate (G-4'-S), 4',7-diglucuronide (G-4',7-diG), and 7-glucuronide-4'-sulfate (G-7-G-4'-S) besides unconjugated GEN were observed in human plasma after ingestion of GEN and its glucoside. Among these metabolites, G-4',7-diG and G-7-G-4'-S were the major ones, comprising both about 30% of the total amount of GEN in plasma. Compared with the aglycone, the amount of total GEN in vivo and those of G-4',7-diG and G-7-G-4'-S were increased after the glucoside intake. No difference was observed in urinary excretion between the aglycone and the glucoside. Overall, the absorption and plasma disposition of GEN were affected by the glucoside form.
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Affiliation(s)
- Bo Yuan
- Department of Pharmaceutical Analysis, Pharmacy School, Shenyang Pharmaceutical University, Shenyang 110016, China
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Aso T, Uchiyama S, Matsumura Y, Taguchi M, Nozaki M, Takamatsu K, Ishizuka B, Kubota T, Mizunuma H, Ohta H. A Natural S-Equol Supplement Alleviates Hot Flushes and Other Menopausal Symptoms in Equol Nonproducing Postmenopausal Japanese Women. J Womens Health (Larchmt) 2012; 21:92-100. [DOI: 10.1089/jwh.2011.2753] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Takeshi Aso
- Department of Obstetrics and Gynecology, Tokyo Medical and Dental University School of Medicine, Tokyo, Japan
| | - Shigeto Uchiyama
- Saga Nutraceuticals Research Institute, Otsuka Pharmaceutical Co., Ltd, Saga, Japan
| | | | - Makoto Taguchi
- Taguchi Obstetrics and Gynecology Clinic, Saitama, Japan
| | - Masahiro Nozaki
- Department of Obstetrics and Gynecology, Kyushu Central Hospital, Fukuoka, Japan
| | - Kiyoshi Takamatsu
- Department of Obstetrics and Gynecology, Tokyo Dental College, Ichikawa General Hospital, Chiba, Japan
| | - Bunpei Ishizuka
- Department of Obstetrics and Gynecology, St. Marianna University School of Medicine, Kanagawa, Japan
| | - Toshiro Kubota
- Department of Obstetrics and Gynecology, Tokyo Medical and Dental University School of Medicine, Tokyo, Japan
| | - Hideki Mizunuma
- Department of Obstetrics and Gynecology, Hirosaki University School of Medicine, Aomori, Japan
| | - Hiroaki Ohta
- Department of Obstetrics and Gynecology, Tokyo Women's Medical University, Tokyo, Japan
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Clarkson TB, Utian WH, Barnes S, Gold EB, Basaria SS, Aso T, Kronenberg F, Frankenfeld CL, Cline JM, Landgren BM, Gallagher JC, Weaver CM, Hodis HN, Brinton RD, Maki PM. The role of soy isoflavones in menopausal health: report of The North American Menopause Society/Wulf H. Utian Translational Science Symposium in Chicago, IL (October 2010). Menopause 2011; 18:732-53. [PMID: 21685820 DOI: 10.1097/gme.0b013e31821fc8e0] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVES If and to what extent soy protein, soy isoflavones, and their metabolites, including S(--)-equol, have beneficial effects on women's health is currently unclear. The North American Menopause Society (NAMS)/Utian Translational Science Symposium on Soy and Soy Isoflavones convened October 9-10, 2010, to clarify basic and clinical research findings as they relate to the risk and benefits of soy products for peri- and postmenopausal women. METHODS A working group of faculty and panelists composed of clinical and research experts in the fields of women's health and botanicals met during a 2-day translational symposium to cover the latest evidence-based science on isoflavones as they affect menopausal symptoms, breast and endometrial cancer, atherosclerosis, bone loss, and cognition. Full descriptions of the bioavailability and pharmacokinetics of isoflavones were also presented. Subspecialty groups then broke off with the goal of translating the information into a report for general medical practice and identifying further research areas. All faculty and panelists reviewed the final report, which was then approved by the NAMS Board of Trustees. RESULTS From the hundreds of studies reviewed in this report, there are mixed results of the effects on midlife women. Soy-based isoflavones are modestly effective in relieving menopausal symptoms; supplements providing higher proportions of genistein or increased in S(--)-equol may provide more benefits. Soy food consumption is associated with lower risk of breast and endometrial cancer in observational studies. The efficacy of isoflavones on bone has not been proven, and the clinical picture of whether soy has cardiovascular benefits is still evolving. Preliminary findings on cognitive benefit from isoflavone therapy support a "critical window" hypothesis wherein younger postmenopausal women derive more than older women. CONCLUSIONS Several areas for further research have been identified on soy and midlife women. More clinical studies are needed that compare outcomes among women whose intestinal bacteria have the ability to convert daidzein to equol (equol producers) with those that lack that ability (equol nonproducers) in order to determine if equol producers derive greater benefits from soy supplementation. Larger studies are needed in younger postmenopausal women, and more research is needed to understand the modes of use of soy isoflavone supplements in women. The interrelations of other dietary components on soy isoflavones consumed as a part of diet or by supplement on equol production also require further study, as do potential interactions with prescription and over-the-counter medications. And finally, greater standardization and documentation of clinical trial data of soy are needed.
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Evans M, Elliott JG, Sharma P, Berman R, Guthrie N. The effect of synthetic genistein on menopause symptom management in healthy postmenopausal women: a multi-center, randomized, placebo-controlled study. Maturitas 2010; 68:189-96. [PMID: 21163595 DOI: 10.1016/j.maturitas.2010.11.012] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Revised: 11/10/2010] [Accepted: 11/11/2010] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To evaluate the efficacy of synthetic genistein for reducing the frequency and severity of hot flushes. STUDY DESIGN A 12 week randomized double-blind, placebo-controlled study in which 84 postmenopausal women received placebo or a single 30 mg dose of synthetic genistein. Outcome measures primary: percentage change in the number of daily hot flushes from pre-treatment to week 12. Secondary: duration and severity of daily hot flushes, Greene Climacteric Scale score, serum follicle stimulating hormone (FSH), 17β-estradiol and endometrial thickness. RESULTS Genistein supplemented subjects completing at least 4 weeks on trial (n=40) demonstrated a 51% reduction (9.4-4.7/day) in the number of hot flushes by week 12 compared to a 27% reduction in the placebo group (9.9-7.1/day) (p=0.026). Subjects in the genistein group also reported significantly fewer hot flushes per day (p=0.010) and a decrease in total duration of hot flushes per day (p=0.009) at week 12 versus placebo. Subjects on genistein (n=32) completing 12 weeks on trial demonstrated a 51% reduction (9.7-4.7/day) in the number of hot flushes by week 12 (p=0.049) compared to 30% reduction in the placebo group (9.8-7.0/day) and had fewer hot flushes per day and a decrease in total duration of hot flushes per day at week 12 compared to placebo (p=0.020 and p=0.017, respectively). There were no differences between groups in Greene Climacteric Scale, FSH, 17β-estradiol, endometrial thickness or adverse events. CONCLUSIONS The current study provides the first evidence that a single daily dose of 30 mg of synthetic genistein reduces hot flush frequency and duration.
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Affiliation(s)
- Malkanthi Evans
- Contract Research Services Division, KGK Synergize Inc., London, ON, Canada.
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Dorjgochoo T, Gu K, Zheng Y, Kallianpur A, Chen Z, Zheng W, Lu W, Shu XO. Soy intake in association with menopausal symptoms during the first 6 and 36 months after breast cancer diagnosis. Breast Cancer Res Treat 2010; 130:879-89. [PMID: 20703939 DOI: 10.1007/s10549-010-1096-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2010] [Accepted: 07/24/2010] [Indexed: 10/19/2022]
Abstract
It has been suggested that soy food and its components may relieve menopausal symptoms (MPS) including hot flashes, night sweats, and vaginal dryness in healthy women. However, little is known about the effect of soy food intake on MPS in women with breast cancer. We examined associations of occurrence of MPS with soy food intake in 4,842 Chinese women aged 20-75 years who had non-metastatic breast cancer and had not used hormone replacement therapy. MPS were assessed at 6 and 36 months after cancer diagnosis using a standardized questionnaire, and associations with soy food intake were evaluated in multivariate regression analyses. Daily soy food intake was assessed at 6 months postdiagnosis and over the first 36 months postdiagnosis using a validated food frequency questionnaire. The prevalence of MPS was 56% at 6 months and 63% at 36 months postdiagnosis with the hotflash being the most common MPS (~44-55%). Hot flashes occurred mainly in premenopausal breast cancer patients who were in the highest quartile of isoflavone intake at 6 months postdiagnosis (OR = 1.20, 95% CI: 0.98-1.59) compared with the lowest quartile. This association was stronger at 36 months postdiagnosis (OR = 1.59, 95% CI: 1.02-2.48). We found no significant associations for any MPS, night sweats, or vaginal dryness. Neither tamoxifen use nor BMI modified the association between MPS and isoflavone intake. There was no evidence that soy food consumption reduced MPS among breast cancer patients. High soy intake may increase the prevalence of hotflashes among premenopausal patients. Our study suggests that soy acts as an estrogen antagonist in breast cancer patients.
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Affiliation(s)
- Tsogzolmaa Dorjgochoo
- Vanderbilt Epidemiology Center, Department of Medicine, Vanderbilt University Medical Center, 2525 West End Avenue, Suite 600, Nashville, TN 37203-1738, USA
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Phytoestrogens and post reproductive health. Maturitas 2010; 66:344-9. [PMID: 20409653 DOI: 10.1016/j.maturitas.2010.03.023] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2010] [Revised: 03/25/2010] [Accepted: 03/25/2010] [Indexed: 11/23/2022]
Abstract
The use of phytoestrogens for various perceived health benefits is widespread. Despite 20 years of research the evidence for any significant health benefits remains inconclusive. Pre clinical trials have demonstrated both non-genomic and genomic actions of constituents of phytoestrogens including selective, but weak, binding to estrogen receptors, with a preference for ER B over ER A. Evidence of clinically relevant biological effects from observational studies and randomized trials has, in general, been lacking. Despite many trials there remains little evidence that phytoestrogens, whether dietary or supplemented, significantly relieve menopausal vasomotor symptoms or cognition. Several potential mechanisms for a positive effect on bone and cardiovascular health have been demonstrated however no fracture prevention data or cardiovascular end point benefit has yet been demonstrated. In vitro effects of phytoestrogens on breast cells have been both stimulatory and inhibitory however net effects appear neutral with observational studies finding no change in breast cancer risk. No effect has been seen on endometrial or other cancers and side effect profiles have, in general, been mild.
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Cassidy A. Dietary phyto-oestrogens: molecular mechanisms, bioavailability and importance to menopausal health. Nutr Res Rev 2009; 18:183-201. [PMID: 19079904 DOI: 10.1079/nrr2005102] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Following the high-profile studies on hormone replacement therapy which provided little evidence in support of the drug therapy improving future health, there remains a growing demand for dietary solutions for maintaining health and preventing disease as women age. Although interest in the relative importance of phyto-oestrogens to human health has increased dramatically over the last decade, the effective dose for health benefits and hypothetical issues on safety remain to be resolved. Plausible mechanisms and epidemiological data are available to support the concept that phyto-oestrogen-rich diets exert physiological effects, but optimal doses and sources of these compounds have still not been elucidated for specific health benefits. In addition, much of the current mechanistic data are difficult to interpret as the experiments have incorporated levels of phyto-oestrogens that may not be achievable in vivo and have to date only used aglycones and glycosides of the pure compounds rather than examining the biological effects of gut and liver metabolites. The present review will concentrate on the isoflavone subclass of phyto-oestrogens, as, to date, these compounds have received most attention from both a commercial and research perspective.
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Affiliation(s)
- Aedín Cassidy
- School of Medicine, Health Policy and Practice, University of East Anglia, Norwich NR4 7TJ, UK.
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Abstract
AIM The aim of the present study was to assess the efficacy and safety of a standardized compound based on an extract of soy phytoestrogens, with high doses of isoflavones in the management of menopausal hot flushes. METHODS A total of 180 women aged 40-65 years with a minimum of five moderate-to-severe hot flushes in the last 7 days at baseline and absence of menstruation for at least 6 months participated in a 12-week prospective, randomized, double-blind, placebo-controlled multicenter trial. After a 2-week run-in period, women received one tablet a day of 80 mg isoflavones (corresponding to 60 mg of genistein) or a matching placebo. RESULTS The mean daily number of moderate-to-severe hot flushes decreased in both study groups, but the reduction was greater in the isoflavones arm at 6 (36.2%) and 12 weeks (41.2%) than in the placebo arm (24.0% at 6 weeks, 29.3% at 12 weeks), with a difference of 1.1 (95% CI [-2.0 to -0.06]) (P = 0.038) at 6 weeks and 1.1 (95% CI [-2.05 to -0.15]) (P = 0.023) at 12 weeks. Similar findings were obtained for hot flushes of any intensity. The Kupperman index decreased in both study groups. Relief of hot flushes was greater when time to menopause was >or=12 months and in cases of BMI >or=27 kg/m(2). CONCLUSION In daily practice conditions, high doses of isoflavones, particularly genistein, can be used for the management of hot flushes in postmenopausal women not treated with hormone replacement therapy due to their superior efficacy to placebo and very good safety profile.
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Affiliation(s)
- Augusto Ferrari
- Gynecology and Obstetrics Department, San Raffaele Hospital, Milano, Italy
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Battaglia C, Cianciosi A, Mancini F, Fabbri R, Busacchi P, Nappi RE, Venturoli S. Genistein Supplements Might Not Induce Clitoral Modifications in Postmenopausal Women: A Prospective, Pilot Study. J Sex Med 2009; 6:3132-8. [DOI: 10.1111/j.1743-6109.2009.01427.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Kang X, Jin S, Zhang Q. Antitumor and antiangiogenic activity of soy phytoestrogen on 7,12-dimethylbenz[alpha]anthracene-induced mammary tumors following ovariectomy in Sprague-Dawley rats. J Food Sci 2009; 74:H237-42. [PMID: 19895476 DOI: 10.1111/j.1750-3841.2009.01278.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Soy phytoestrogen is often used as hormone replacement therapy to alleviate the symptoms of menopause in postmenopausal women. Since estrogen has been considered as an important risk factor for the development of breast carcinoma, we need to know whether it is safe for these postmenopausal women with breast cancer to take soy foods that are rich in phytoestrogen. In the present study, we investigated the efficacy of soy phytoestrogen on tumor proliferation, apoptosis, and angiogenesis in mammary tumors that had already formed in ovariectomized rats. We found that soy phytochemical extraction inhibited proliferation and induced apoptosis in vitro and in vivo, and it demonstrated better antitumor effects than single phytoestrogen. Soy phytochemical extraction also produced surprisingly good antiangiogenic effects, which were evidenced by lower microvascular density, reduced plasma vascular endothelial growth factor, and increased plasma endostatin levels. Our findings suggest that soy phytochemical extraction exerts significant antitumor and antiangiogenic activity in a postmenopausal animal model with breast cancer.
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Affiliation(s)
- Xinmei Kang
- Dept of Medical Oncology, Tumor Hospital of Harbin Medical Univ, Harbin 150040, China
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Abstract
OBJECTIVE To evaluate the effect of 90 mg of daily genistein on markers of bone turnover and menopausal symptoms. DESIGN This was a cross-over, placebo-controlled study involving 100 postmenopausal women. Subjects were randomly assigned to daily genistein or placebo for 6 weeks and crossed over to the alternative preparation for the following 6 weeks. Pure genistein was processed and encapsulated in accordance with British Pharmacopoeia standards. Each capsule contained 90 mg of pure genistein while the placebo contained just the recipients. RESULTS In women with significant hot flushes (score (intensity x number) > or = 9), genistein reduced symptoms by 30% compared to baseline and the difference compared to placebo was statistically significant. No effect was observed on biochemical markers of bone turnover, possibly due to the short duration of each arm of the study. Genistein reduced osteocalcin, a marker of bone formation, by 3.6% compared to baseline and 0.31% compared to placebo (p = 0.81 and 0.40, respectively). Genistein increased cross-link telopeptide, a marker of bone resorption, by 1.8% compared to baseline and 0.29% compared to placebo; both differences were not statistically significant (p = 0.078 and 0.88, respectively). CONCLUSION Pure genistein at a dose of 90 mg per day appears to reduce the number of hot flushes in postmenopausal women but the effect is mild.
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Affiliation(s)
- P Albertazzi
- Centre for Metabolic Bone Disease, University of Hull, UK
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Messina M, Watanabe S, Setchell KDR. Report on the 8th International Symposium on the Role of Soy in Health Promotion and Chronic Disease Prevention and Treatment. J Nutr 2009; 139:796S-802S. [PMID: 19225130 DOI: 10.3945/jn.108.104182] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
The international soy symposium held in Tokyo, November 9-12, 2008, was the eighth in a series that began in 1994. This most recent meeting is noteworthy for several reasons. First, it was held in the country most identified with the foods that are the focus of the meeting. Soyfoods were first consumed in China more than a millennium ago, but it is the low incidence of breast and prostate cancer, heart disease, and hot flashes in Japan, despite the high socioeconomic status of this country, that helped fuel interest in the early 1990s in the possible chronic disease-preventive properties of soy and certain soybean constituents. Second, it was the first time an entire session was devoted to equol, a bacterially derived product of the soybean isoflavone daidzein, which is produced by only approximately 30% of Westerners and has been proposed to be an especially beneficial compound, i.e., the equol hypothesis. And third, there was greater emphasis during this meeting than at past ones on addressing some of the more hotly debated health effects linked with soy intake. The conference was attended by >250 scientists from 20 countries; there were 33 oral and 40 poster presentations during the 4-d event. The majority of presentations at the Tokyo symposium focused on isoflavones. In this article, the major findings presented at the symposium are highlighted, and commentary about those findings and related background is provided.
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Affiliation(s)
- Mark Messina
- Nutrition Matters, Port Townsend, WA 98368, USA.
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Ishiwata N, Melby MK, Mizuno S, Watanabe S. New equol supplement for relieving menopausal symptoms: randomized, placebo-controlled trial of Japanese women. Menopause 2009; 16:141-8. [PMID: 19131846 DOI: 10.1097/gme.0b013e31818379fa] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
OBJECTIVES Equol, a metabolite of the isoflavone daidzein, is hypothesized to play a major role in the health benefits of soy. We examined the effect of a new S-equol supplement on menopausal symptoms and mood states. DESIGN We conducted a randomized, double-blind, placebo-controlled trial with our new equol supplement for 12 weeks with 134 Japanese women (aged 40-59 years). They were randomly assigned to three groups: placebo (n = 44), 10 mg of equol per day (EQ-1; n = 44), and 10 mg of equol three times per day (EQ-3; n = 46). Habitual isoflavone intake was limited to 20 mg/d. Participants completed menopausal symptom and Profile of Mood States questionnaires at baseline and postintervention. Physical examination and blood and 24-hour urine collection were performed at baseline and postintervention. RESULTS At baseline, total menopausal symptom score varied by menopausal and equol producer status (34.3% producers). A total of 127 participants (94.8%) completed the trial. No adverse effects were reported, except for a systemic rash in one EQ-3 woman. The anxiety scores of equol producers were lower than those of nonproducers (P < 0.05). Significant differences between premenopausal and perimenopausal/postmenopausal symptom scores were observed for anxiety, somatic, and total scores. After the EQ-3 intervention, perimenopausal/postmenopausal equol nonproducers showed significant decreases from baseline in all menopausal symptom scores except depression (P < 0.01). Compared with placebo, the EQ-3 group showed significant decreases in depression scores (P < 0.05), as well as significant decreases in Tension-Anxiety (P < 0.05), Depression-Dejection (P < 0.05) and Fatigue (P < 0.01) and increases in Vigor (P < 0.05) of the Profile of Mood States. CONCLUSION S-equol supplement improved mood-related symptoms in perimenopausal/postmenopausal equol nonproducers.
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Affiliation(s)
- Naoko Ishiwata
- Department of Life Environments Management, Atomi University, Niza-shi, Saitama, Japan.
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43
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Gardner CD, Chatterjee LM, Franke AA. Effects of isoflavone supplements vs. soy foods on blood concentrations of genistein and daidzein in adults. J Nutr Biochem 2008; 20:227-34. [PMID: 18602820 DOI: 10.1016/j.jnutbio.2008.02.008] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2007] [Revised: 02/15/2008] [Accepted: 02/20/2008] [Indexed: 01/22/2023]
Abstract
The objective of this investigation was to examine the pharmacokinetics of isoflavone concentrations over a 24-h period among healthy adults consuming either soy foods or soy isoflavone tablets at different doses. This randomized, cross-over trial was conducted with 12 generally healthy adults. The three phases of the intervention included isoflavone tablets at (1) 144 mg/day or (2) 288 mg/day and (3) soy foods designed to provide a calculated 96 mg isoflavones/day (doses in aglycone equivalents). Doses were spread out over three meals per day. After 6 days on each study phase, plasma isoflavone concentrations were determined on the seventh day at 0, 4, 8, 10, 12 and 24 h. Average levels of total isoflavone concentrations at 8, 10 and 12 h were >4 micromol/L for the soy food phase and for the higher dose tablet phase. Genistein concentrations were higher overall in the soy food vs. both the lower and the higher dose supplement phases of the study (P<.05). When comparing plasma concentrations for the two doses of tablets, saturation appeared more evident for genistein than for daidzein at the higher dose level. In conclusion, we observed important differences in the pharmacokinetics of genistein and daidzein contrasting the sources and doses of isoflavones when administered three times daily, including a possible advantage for increasing serum concentrations of isoflavones from consuming soy foods relative to isoflavone supplements.
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Affiliation(s)
- Christopher D Gardner
- Stanford Prevention Research Center, Stanford University Medical School, CA 94305-5705, USA.
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Messina M. Investigating the Optimal Soy Protein and Isoflavone Intakes for Women: A Perspective. WOMENS HEALTH 2008; 4:337-56. [DOI: 10.2217/17455057.4.4.337] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Traditional soyfoods have been consumed for centuries throughout much of East Asia and, recently, these foods have also become popular in the West. Soyfoods and specific soybean components, such as the protein and isoflavones, have attracted attention for their possible health benefits. Isoflavones are classified as phytoestrogens and have been postulated to be natural alternatives to hormone therapy for menopausal women. To provide guidance on optimal soy intake, this article evaluates Asian soy consumption and both clinical and Asian epidemiologic studies that examined the relationship between soy intake and a variety of health outcomes. On the basis of these data and the standard principles of dietary practice the author suggests that optimal soy protein and isoflavone intakes are 15–20 g/day and 50–90 mg/day, respectively. In addition, an intake of 25 g/day soy protein can be specifically used as the recommendation for cholesterol reduction.
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Affiliation(s)
- Mark Messina
- Loma Linda University, Adjunct Associate Professor, Department of Nutrition, School of Public Health, Loma Linda, CA, USA and, President, Nutrition Matters, Inc., 439 Calhoun Street, Port Townsend, WA 9836, USA, Tel.: +1 360 379 9544; Fax: +1 360 379 9614
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45
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Effects of ginkgo biloba on in vitro osteoblast cells and ovariectomized rat osteoclast cells. Arch Pharm Res 2008; 31:216-24. [DOI: 10.1007/s12272-001-1144-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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D'Anna R, Cannata ML, Atteritano M, Cancellieri F, Corrado F, Baviera G, Triolo O, Antico F, Gaudio A, Frisina N, Bitto A, Polito F, Minutoli L, Altavilla D, Marini H, Squadrito F. Effects of the phytoestrogen genistein on hot flushes, endometrium, and vaginal epithelium in postmenopausal women: a 1-year randomized, double-blind, placebo-controlled study. Menopause 2007; 14:648-55. [PMID: 17251874 DOI: 10.1097/01.gme.0000248708.60698.98] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To evaluate in a 12-month, prospective, randomized, double-blind, placebo-controlled study whether pure administration of the phytoestrogen genistein (54 mg/d) might reduce the number and severity of hot flushes in postmenopausal women with no adverse effect on the endometrium. DESIGN A total of 389 participants met the main study criteria and were randomly assigned to receive the phytoestrogen genistein (n=198) or placebo (n=191). About 40% of participants in both groups did not suffer from hot flushes, and the evaluation was performed in a subgroup of 247 participants (genistein, n=125; placebo, n=122). Reductions from baseline in the frequency and severity of hot flushes were the principal criteria of efficacy. Endometrial thickness was evaluated by ultrasonography. The maturation value was also used to determine hormonal action on the vaginal cells. RESULTS There were no significant differences in age, time since menopause, body mass index, and vasomotor symptoms between groups at baseline (4.4 +/- 0.33 hot flushes per day in the genistein group and 4.2 +/- 0.35 hot flushes per day in the control group). The effect was already evident in the first month and reached its peak after 12 months of genistein therapy (-56.4% reduction in the mean number of hot flushes). Furthermore, there was a significant difference between the two groups at each evaluation time (1, 3, 6, and 12 months). No significant difference was found in mean endometrial thickness and maturation value score between the two groups, either at baseline or after 12 months. CONCLUSIONS The phytoestrogen genistein has been shown to be effective on vasomotor symptoms without an adverse effect on endometrium.
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Affiliation(s)
- Rosario D'Anna
- Department of Obstetrical and Gynaecological Sciences, University of Messina, Messina, Italy
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Abstract
OBJECTIVE To examine the differences between biomedical and Japanese women's concepts of vasomotor symptoms and the relationships between the symptom of chilliness (hieshō) and menopause status, other vasomotor symptoms, and environmental factors such as soy isoflavone intake and exposure in Japan. DESIGN Participants were healthy Japanese women, aged 45 to 55, living in Kyoto and Fukushima prefectures, divided into menopausal groups based on menstrual patterns. Women recalled 82 general health symptoms during the previous 2 weeks and collected finger-prick dried blood spots and matched 24-hour dietary records, which were analyzed, respectively, for isoflavone concentration by high-performance liquid chromatography coulometric electrode array detection and for soy isoflavone intake using a Japanese phytochemical database. RESULTS An examination of kōnenki (Japanese for climacteric) symptoms suggests that chilliness (hieshō), which was reported by 29.3% of participants compared with a range of 3.0% to 22.1% for hot flushes, constitutes an important vasomotor symptom. Chilliness prevalence differed significantly between premenopausal and other menopausal status groups, with positive correlations with other estrogen-influenced sexual-vasomotor symptoms and negative correlations with isoflavone concentrations. Negative correlations with soy isoflavone intake were also found for sweating, although not for nobose and hoteri (two Japanese terms for hot flush). CONCLUSIONS Chilliness seems to be a more important vasomotor symptom than hot flushes and sweats in Japanese women and may reflect differing thermoregulatory physiology, possibly influenced by dietary soy.
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Tempfer CB, Bentz EK, Leodolter S, Tscherne G, Reuss F, Cross HS, Huber JC. Phytoestrogens in clinical practice: a review of the literature. Fertil Steril 2007; 87:1243-9. [DOI: 10.1016/j.fertnstert.2007.01.120] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2006] [Revised: 01/11/2007] [Accepted: 01/11/2007] [Indexed: 10/23/2022]
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Welty FK, Lee KS, Lew NS, Nasca MM, Zhou JR. The association between soy nut consumption and decreased menopausal symptoms. J Womens Health (Larchmt) 2007; 16:361-9. [PMID: 17439381 PMCID: PMC3229924 DOI: 10.1089/jwh.2006.0207] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Epidemiological studies suggest a low incidence of hot flashes in populations that consume dietary soy. The present study examined the effect of soy nuts on hot flashes and menopausal symptoms. METHODS Sixty healthy postmenopausal women were randomized in a crossover design to a therapeutic lifestyle changes (TLC) diet alone and a TLC diet of similar energy, fat, and protein content in which one-half cup soy nuts divided into three or four portions spaced throughout the day (containing 25 g soy protein and 101 mg aglycone isoflavones) replaced 25 g of nonsoy protein. During each 8-week diet period, subjects recorded the number of hot flashes and amount of exercise daily. At the end of each 8-week diet period, subjects filled out the menopausal symptom quality of life questionnaire. RESULTS Compared to the TLC diet alone, the TLC diet plus soy nuts was associated with a 45% decrease in hot flashes (7.5 +/- 3.6 vs. 4.1 +/- 2.6 hot flashes day, respectively, p < 0.001) in women with >4.5 hot flashes/day at baseline and 41% in those with CONCLUSIONS Substituting soy nuts for nonsoy protein in a TLC diet and consumed three or four times throughout the day is associated with a decrease in hot flashes and improvement in menopausal symptoms.
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Affiliation(s)
- Francine K Welty
- Division of Cardiology, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02215, USA.
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50
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Pyo YH. Production of a High Value-Added Soybean Containing Bioactive Mevinolins and Isoflavones. Prev Nutr Food Sci 2007. [DOI: 10.3746/jfn.2007.12.1.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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