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phytoestrogen

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https://www.readbyqxmd.com/read/28238967/resveratrol-fuels-her2-and-er%C3%AE-positive-breast-cancer-behaving-as-proteasome-inhibitor
#1
Andreani Cristina, Bartolacci Caterina, Wijnant Kathleen, Crinelli Rita, Bianchi Marzia, Magnani Mauro, Hysi Albana, Iezzi Manuela, Amici Augusto, Marchini Cristina
The phytoestrogen resveratrol has been reported to possess cancer chemo-preventive activity on the basis of its effects on tumor cell lines and xenograft or carcinogen-inducible in vivo models. Here we investigated the effects of resveratrol on spontaneous mammary carcinogenesis using Δ16HER2 mice as HER2+/ERα+ breast cancer model. Instead of inhibiting tumor growth, resveratrol treatment (0.0001% in drinking water; daily intake of 4μg/mouse) shortened tumor latency and enhanced tumor multiplicity in Δ16HER2 mice...
February 26, 2017: Aging
https://www.readbyqxmd.com/read/28208754/gypenoside-xvii-prevents-atherosclerosis-by-attenuating-endothelial-apoptosis-and-oxidative-stress-insight-into-the-er%C3%AE-mediated-pi3k-akt-pathway
#2
Ke Yang, Haijing Zhang, Yun Luo, Jingyi Zhang, Min Wang, Ping Liao, Li Cao, Peng Guo, Guibo Sun, Xiaobo Sun
Phytoestrogens are estrogen-like compounds of plant origin. The pharmacological activities of phytoestrogens are predominantly due to their antioxidant, anti-inflammatory and lipid-lowering properties, which are mediated via the estrogen receptors (ERs): estrogen receptor alpha (ERα) and estrogen receptor beta (ERβ) and possibly G protein-coupled estrogen receptor 1 (GPER). Gypenoside XVII (GP-17) is a phytoestrogen that is widely used to prevent cardiovascular disease, including atherosclerosis, but the mechanism underlying these therapeutic effects is largely unclear...
February 9, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28187468/development-of-an-enzyme-linked-immunosorbent-assay-for-determination-of-miroestrol-using-an-anti-miroestrol-monoclonal-antibody
#3
Tharita Kitisripanya, Supaluk Krittanai, Orapin Udomsin, Kamonthip Jutathis, Jukrapun Komaikul, Thaweesak Juengwatanatrakul, Seiichi Sakamoto, Hiroyuki Tanaka, Satoshi Morimoto, Waraporn Putalun
Miroestrol is a chromene with potent estrogenic activity present in Pueraria candollei, commonly known as White Kwao Krua. Although this compound is only present in low amounts in the plant, it plays an important role in the estrogenic action of P. candollei products. As a tool for further studies about the efficacy and safety of P. candollei as a phytoestrogenic supplement, we generated a novel monoclonal antibody against miroestrol. This anti-miroestrol monoclonal antibody was used to develop an immunoassay for the determination of miroestrol content, which can be used for quality control purposes of P...
February 10, 2017: Planta Medica
https://www.readbyqxmd.com/read/28183304/genistein-treatment-improves-fracture-resistance-in-obese-diabetic-mice
#4
Britton Odle, Nathan Dennison, Layla Al-Nakkash, Tom L Broderick, Jeffrey H Plochocki
BACKGROUND: Obese, type two diabetics are at an increased risk for fracturing their limb bones in comparison to the general population. Phytoestrogens like as the soy isoflavone genistein have been shown to protect against bone loss. In this study, we tested the effects of genistein treatment on femurs of ob/ob mice, a model for obesity and type two diabetes mellitus. METHODS: Twenty six-week-old female mice were divided into obese (ob/ob) control, obese genistein-treated, lean (ob/+) control, and lean genistein-treated groups (n = 5 each)...
January 9, 2017: BMC Endocrine Disorders
https://www.readbyqxmd.com/read/28170386/peripubertal-dietary-flavonol-and-lignan-intake-and-age-at-menarche-in-a-longitudinal-cohort-of-girls
#5
Nancy A Mervish, Susan L Teitelbaum, Ashley Pajak, Gayle C Windham, Susan M Pinney, Lawrence H Kushi, Frank M Biro, Mary S Wolff
BACKGROUND: Dietary phytoestrogens may alter hormonal activity in childhood. Flavonols and lignans are the most prevalent phytoestrogens in the Western diet.We examined whether higher intake of flavonols and lignans were associated with later age at menarche in a prospective study of young girls. METHODS: 1044 girls ages 6-8 years (mean 7.3 yr) with 2-4 24 hour dietary recalls during their baseline year were followed for 11 years until attainment of menarche in the Breast Cancer and Environment Research Project (BCERP)...
February 7, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28159478/identification-of-exposure-to-environmental-chemicals-in-children-and-older-adults-using-human-biomonitoring-data-sorted-by-age-results-from-a-literature-review
#6
Judy Choi, Lisbeth E Knudsen, Seher Mizrak, Anke Joas
Human biomonitoring (HBM) provides the tools for exposure assessment by direct measurements of biological specimens such as blood and urine. HBM can identify new chemical exposures, trends and changes in exposure, establish distribution of exposure among the general population, and identify vulnerable groups and populations with distinct exposures such as children and older adults. The objective of this review is to demonstrate the use of HBM to identify environmental chemicals that might be of concern for children or older adults due to higher body burden...
December 21, 2016: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28152387/development-of-an-enzyme-linked-immunosorbent-assay-for-the-detection-of-isomiroestrol-an-identical-marker-in-white-kwao-krua-using-a-monoclonal-antibody
#7
Tharita Kitisripanya, Kamonthip Jutathis, Chadathorn Inyai, Jukrapun Komaikul, Orapin Udomsin, Hiroyuki Tanaka, Waraporn Putalun
Pueraria candollei var. mirifica or White Kwao Krua (WKK) is a phytoestrogen-rich plant widely used among women to improve climacteric symptoms. Additionally, the tuberous roots of this plant have been added as an active ingredient for skin rejuvenation and breast enlargement effects in various functional foods. However, most of the products on the market containing WKK have not been sufficiently standardized with respect to the active compound or identical marker. To control the quality of these plant materials, an enzyme-linked immunosorbent assay (ELISA) using anti-isomiroestrol antibodies was established for the determination of isomiroestrol, an identical marker in WKK...
January 23, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28125641/synergistic-action-of-genistein-and-calcitriol-in-immature-osteosarcoma-mg-63-cells-by-sgpl1-up-regulation
#8
Nadja Engel, Anna Adamus, Nicolas Schauer, Juliane Kühn, Barbara Nebe, Guido Seitz, Karin Kraft
BACKGROUND: Phytoestrogens such as genistein, the most prominent isoflavone from soy, show concentration-dependent anti-estrogenic or estrogenic effects. High genistein concentrations (>10 μM) also promote proliferation of bone cancer cells in vitro. On the other hand, the most active component of the vitamin D family, calcitriol, has been shown to be tumor protective in vitro and in vivo. The purpose of this study was to examine a putative synergism of genistein and calcitriol in two osteosarcoma cell lines MG-63 (early osteoblast), Saos-2 (mature osteoblast) and primary osteoblasts...
2017: PloS One
https://www.readbyqxmd.com/read/28119158/sources-of-variance-within-and-among-young-men-in-concentrations-of-17%C3%AE-estradiol-and-testosterone-in-axillary-perspiration
#9
Brittney Elliott, Cameron Muir, Denys deCatanzaro
The most potent estrogen, 17β-estradiol (E2), and its precursor, testosterone (T), play critical roles in mammalian reproductive processes. Evidence indicates that these steroids are present in bioactive form in the excretions of many male mammals. It has been demonstrated that small lipophilic steroids such as E2 can be absorbed by proximate females from male excretions, arriving in the uterus, brain, and other organs where there are estrogen receptors. We took repeated samples of axillary perspiration from men aged 20-30years during vigorous exercise...
January 21, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28109283/ethanol-extracted-cameroonian-propolis-exerts-estrogenic-effects-and-alleviates-hot-flushes-in-ovariectomized-wistar-rats
#10
Stéphane Zingue, Chantal Beatrice Magne Nde, Thomas Michel, Derek Tantoh Ndinteh, Jules Tchatchou, Moïse Adamou, Xavier Fernandez, Fernand-Nestor Tchuenguem Fohouo, Colin Clyne, Dieudonné Njamen
BACKGROUND: Since the biological properties of propolis depend to the plants that can be found in a specific region, propolis from unexplored regions attracts the attention of scientists. Ethanolic extract of Cameroonian propolis (EEP) is used to treat various ailments including gynecological problems and amenorrhea. Since there were no scientific data to support the above claims, the present study was therefore undertaken to assess estrogenic properties of Cameroonian propolis. METHODS: To achieve our goal, the ability of EEP to induce MCF-7 cells proliferation in E-screen assay as well as to activate estrogen receptors α (ERα) and β (ERβ) in cell-based reporter gene assays using human embryonic kidney cells (HEK293T) transfected with ERs was tested...
January 21, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28109136/therapeutic-potential-of-targeting-wnt-%C3%AE-catenin-pathway-in-treatment-of-colorectal-cancer-rational-and-progress
#11
Afsane Bahrami, Forouzan Amerizadeh, Soodabeh ShahidSales, Majid Khazaei, Majid Ghayour-Mobarhan, Hamid Reza Sadeghnia, Mina Maftouh, Seyed Mahdi Hassanian, Amir Avan
Wnt/β-catenin pathway is one of the main/frequent dysregulated pathways in several tumor types, including colon cancer. Aberrant activation of this pathway is associated with cell proliferation, invasive behaviors and cell resistance, suggesting its potential value as a therapeutic target in treatment of CRC. Several agents have been developed for targeting of this pathway (e.g, natural agents: curcumin, 3,3-diindolylmethane, phytoestrogen; Synthetic/small Wnt inhibitors: Rofecoxib; PRI-724, CWP232291; and monoclonal antibody against frizzled receptors, Vanituctumab...
January 21, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28096960/estrogen-agonist-genistein-differentially-influences-the-cognitive-and-motor-disorders-in-an-ovariectomized-animal-model-of-parkinsonism
#12
Elaheh Arbabi, Gholamali Hamidi, Sayyed Alireza Talaei, Mahmoud Salami
OBJECTIVES: Parkinson's disease (PD) is a progressive neurological disorder associated with motor disabilities and cognitive dysfunction as well. Evidence indicates that PD occurs less frequently in women than men, confirming a role for steroid hormones in protection of dopaminergic nigrostriatal neurons. It is reported that soy genistein, an estrogen agonist phytoestrogen, display neuroprotective effects against neuronal death. In this study we evaluated the effect of genistein in animal models of Parkinsonism (P) and Parkinsonism + ovariectomized (OP)...
December 2016: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28094541/intestinal-proportion-of-blautia-sp-is-associated-with-clinical-stage-and-histoprognostic-grade-in-patients-with-early-stage-breast-cancer
#13
Trang H Luu, Catherine Michel, Jean-Marie Bard, François Dravet, Hassan Nazih, Christine Bobin-Dubigeon
Improving knowledge about breast cancer etiology is crucial in order to propose prevention strategies for this pathology. Gut microbiota is involved in numerous physiopathological situations including cancers. Although its potential involvement in breast cancer through the alteration of the enterohepatic circulation of estrogens and/or the metabolism of phytoestrogens has been discussed for some time, it remains to be demonstrated. The present study seeks to strengthen this hypothesis by identifying possible links between the fecal microbiota composition and clinical characteristics in breast cancer patients...
February 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/28091829/inhibition-of-dpp-4-activity-and-neuronal-atrophy-with-genistein-attenuates-neurological-deficits-induced-by-transient-global-cerebral-ischemia-and-reperfusion-in-streptozotocin-induced-diabetic-mice
#14
Mithun Singh Rajput, Purnima Dey Sarkar, Nilesh Prakash Nirmal
Genistein, an isoflavonoid phytoestrogen, has been known for its potential pharmacological properties especially for neuroprotection and treating diabetes. The present study aims to determine the neuroprotective efficacy of genistein against global cerebral ischemia-reperfusion-induced neuronal injury in streptozotocin-induced diabetic mice and explore the underlying mechanisms. Streptozotocin-induced diabetic mice were subjected to transient cerebral ischemia by occluding both common carotid arteries for 30 min followed by 24 h reperfusion to induce neuronal injury...
January 16, 2017: Inflammation
https://www.readbyqxmd.com/read/28091581/icaritin-enhances-mesc-self-renewal-through-upregulating-core-pluripotency-transcription-factors-mediated-by-er%C3%AE
#15
Wing Pui Tsang, Fengjie Zhang, Qiling He, Waijiao Cai, Jianhua Huang, Wai Yee Chan, Ziyin Shen, Chao Wan
Utilization of small molecules in modulation of stem cell self-renewal is a promising approach to expand stem cells for regenerative therapy. Here, we identify Icaritin, a phytoestrogen molecule enhances self-renewal of mouse embryonic stem cells (mESCs). Icaritin increases mESCs proliferation while maintains their self-renewal capacity in vitro and pluripotency in vivo. This coincides with upregulation of key pluripotency transcription factors OCT4, NANOG, KLF4 and SOX2. The enhancement of mESCs self-renewal is characterized by increased population in S-phase of cell cycle, elevation of Cylin E and Cyclin-dependent kinase 2 (CDK2) and downregulation of p21, p27 and p57...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28079011/molecular-mechanisms-of-anticancer-effects-of-phytoestrogens-in-breast-cancer
#16
Chia-Jung Hsieh, Ya-Ling Hsu, Ya-Fang Huang, Eing-Mei Tsai
Phytoestrogens derived from plants exert estrogenic as well as antiestrogenic effects and multiple actions within breast cancer cells. Chemopreventive properties of phytoestrogens have emerged from epidemiological observations. In recent clinical research studies, phytoestrogens are safe and may even protect against breast cancer. In this brief review, the molecular mechanisms of phytoestrogens on regulation of cell cycle, apoptosis, estrogen receptors, cell signaling pathways, and epigenetic modulations in relation to breast cancer are discussed...
January 11, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28077306/the-interaction-of-dietary-isoflavones-and-estradiol-replacement-on-behavior-and-brain-derived-neurotrophic-factor-in-the-ovariectomized-rat
#17
Ashley L Russell, Jamie Moran Grimes, Darwin O Larco, Danette F Cruthirds, Joanna Westerfield, Lawren Wooten, Margaret Keil, Michael J Weiser, Michael R Landauer, Robert J Handa, T John Wu
Phytoestrogens are plant derived, non-steroidal compounds naturally found in rodent chows that potentially have endocrine-disrupting effects. Isoflavones, the most common phytoestrogens, have a similar structure and molecular weight to 17β-estradiol (E2) and have the ability to bind and activate both isoforms of the estrogen receptor (ER). Most isoflavones have a higher affinity for ERβ, which is involved in sexually dimorphic behavioral regulation. The goal of this study was to examine the interaction of isoflavones and E2 presence in the OVX rat on anxiety- and depressive- like behavior and the related BDNF pathophysiology...
January 8, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28063855/low-dietary-soy-isoflavonoids-increase-hippocampal-spine-synapse-density-in-ovariectomized-rats
#18
Neil J MacLusky, Gladis Thomas, Csaba Leranth
High dietary intake of plant estrogens (phytoestrogens) can affect brain structure and function. The effects of phytoestrogen intake within the range of normal animal and human dietary consumption, however, remain uncertain. The aim of the present study was to determine the effects of the isoflavonoids present in a standard low phytoestrogen laboratory rat chow on spine synapse density in the stratum radiatum of area CA1 of the hippocampus. Weanling rats (22 days old) were fed either standard chow (Teklad 2018), a nutritionally comparable diet without soy (Teklad 2016) or a custom diet containing Teklad 2016 supplemented with the principal soy isoflavonoids, daidzein and genistein, for 40 days...
January 4, 2017: Brain Research
https://www.readbyqxmd.com/read/28054939/effects-of-resveratrol-on-cognitive-performance-mood-and-cerebrovascular-function-in-post-menopausal-women-a-14-week-randomised-placebo-controlled-intervention-trial
#19
Hamish M Evans, Peter R C Howe, Rachel H X Wong
We tested whether chronic supplementation with resveratrol (a phytoestrogen) could improve cerebrovascular function, cognition and mood in post-menopausal women. Eighty post-menopausal women aged 45-85 years were randomised to take trans-resveratrol or placebo for 14 weeks and the effects on cognitive performance, cerebral blood flow velocity and pulsatility index (a measure of arterial stiffness) in the middle cerebral artery (using transcranial Doppler ultrasound), and cerebrovascular responsiveness (CVR) to both cognitive testing and hypercapnia were assessed...
January 3, 2017: Nutrients
https://www.readbyqxmd.com/read/28054115/-risk-and-benefit-of-nutritional-supplements-for-the-treatment-of-postmenopausal-complaints
#20
Patrick Diel, Anne Kurrat, Christina Oden, Lars Hanke
Menopause is for many females associated with an occurrence of a variety of health complaints and a decrease in quality in life. Hot flashes, sleep disturbances and a variety of other symptoms result in a strong psychological strain. Hormone replacement therapy for treatment of climacteric complaints is discussed controversially regarding associated side effects. This is a major reason to propose treatment with plant derived extracts and compounds as an alternative. Such compounds are available either as drugs but mostly as nutritional supplements...
January 4, 2017: Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz
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