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Estradiol

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https://www.readbyqxmd.com/read/28088496/endogenous-thrombin-potential-changes-during-the-first-cycle-of-oral-contraceptive-use
#1
Carolyn L Westhoff, Malcolm C Pike, Serge Cremers, Andrew Eisenberger, Stella Thomassen, Jan Rosing
OBJECTIVES: Venous thromboembolism (VTE) risk increases within months of combination oral contraceptive (COC) initiation. Because elevated endogenous thrombin potential (ETP) has been found in several studies to be a VTE risk factor, we evaluated the extent of ETP changes during the initial cycle of an ethinyl estradiol (EE) and levonorgestrel (LNG) COC. We also assessed the relationship between ETP changes and systemic EE and LNG concentrations. STUDY DESIGN: Participants provided multiple blood samples during a first 21-day cycle of a 30 μg EE/150 μg LNG COC and after a further 7 days without an active COC...
January 11, 2017: Contraception
https://www.readbyqxmd.com/read/28088469/estrogen-induced-expression-of-tissue-factor-pathway-inhibitor-2-in-mcf7-cells-involves-lysine-specific-demethylase-1
#2
Marianne S Andresen, Huda Omar Ali, Christiane Filion Myklebust, Per Morten Sandset, Benedicte Stavik, Nina Iversen, Grethe Skretting
Hormone-sensitive cancers can be influenced by estrogens, a process usually mediated through the estrogen receptor (ER). Tissue factor pathway inhibitor type 2 (TFPI-2) is a Kunitz-type serine protease inhibitor involved in regulating the extracellular matrix. The present study demonstrates that the expression of TFPI-2 can be induced by estrogens. Breast cancer data from GOBO displayed increased levels of TFPI-2 and increased survival in patients with ERα+ tumors. Treatment of MCF7 cells (ERα+) with 17β-estradiol (E2) or 17α-ethinyl estradiol (EE2) increased TFPI-2 mRNA and protein levels...
January 11, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28088383/evaluating-the-role-of-astrocytes-on-%C3%AE-estradiol-effect-on-seizures-of-pilocarpine-epileptic-model
#3
Masoumeh Sarfi, Mahmoud Elahdadi Salmani, Iran Goudarzi, Taghi Lashkar Boluki, Kataneh Abrari
Epilepsy with periodic and unpredictable seizures is associated with hippocampal glutamate toxicity and tissue reorganization. Astrocytes play an important role in mediating the neuroprotective effects of estradiol and reducing seizure severity. Accordingly, the protective effects of low and high doses of estradiol on behavioral, astrocytic involvement and neuronal survival aspects of Pilocarpine-induced epilepsy were investigated. Lithium- Pilocarpine (30mg/kg) model was used to provoke epilepsy. Βeta-estradiol (2,40μg/ µl) was injected subcutaneously from 48 before to 48h after seizure induction...
January 11, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28087972/lack-of-effect-of-oral-cabotegravir-on-the-pharmacokinetics-of-a-levonorgestrel-ethinyl-estradiol-containing-oral-contraceptive-in-healthy-adult-females
#4
C Trezza, S L Ford, E Gould, Y Lou, C Huang, J M Ritter, A M Buchanan, W Spreen, P Patel
AIM(S): This study aimed to investigate whether cabotegravir (CAB), an integrase inhibitor in development for treatment and prevention of HIV-1, influences the pharmacokinetics (PK) of a levonorgestrel (LNG) and ethinyl estradiol (EE)-containing oral contraceptive (OC) in healthy women. METHODS: In this open-label, fixed-sequence crossover study, healthy female subjects received LNG 0.15 mg/EE 0.03 mg tablet once daily Days 1-10 alone and with oral CAB 30 mg once daily Days 11-21...
January 14, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28087301/molecular-characterization-and-quantification-of-estrogen-receptors-in-turbot-scophthalmus-maximus
#5
Peng Hu, Zheng Meng, Yudong Jia
Estrogens regulate various reproductive processes via estrogen receptor (ER)-mediated signaling pathway in vertebrates. In this study, full-length sequences coding for ERα, ERβ1 and ERβ2 were isolated from female turbot (Scophthalmus maximus) by homology cloning and a strategy based on rapid amplification of cDNA end-polymerase chain reaction (RACE-PCR). The nucleotide and amino acid sequences of turbot ERs showed high homologies with the corresponding sequences of other fish species and significant homology with the Japaenese flounder (Paralichthys olivaceus) and the European sea bass (Dicentrarchus labrax)...
January 10, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28078498/perinatal-exposure-to-bisphenol-a-or-diethylstilbestrol-increases-the-susceptibility-to-develop-mammary-gland-lesions-after-estrogen-replacement-therapy-in-middle-aged-rats
#6
Ayelen L Gomez, Melisa B Delconte, Gabriela A Altamirano, Lucia Vigezzi, Veronica L Bosquiazzo, Luís F Barbisan, Jorge G Ramos, Enrique H Luque, Mónica Muñoz-de-Toro, Laura Kass
The development of the mammary gland is a hormone-regulated event. Several factors can dysregulate its growth and make the gland more susceptible to cellular transformation. Among these factors, perinatal exposure to xenoestrogens and hormone replacement therapy has been associated with increased risk of developing breast cancer. Here, we assessed the effects induced by estrogen replacement therapy (ERT) in ovariectomized (OVX) middle-aged rats and whether perinatal exposure to diethylstilbestrol (DES) or bisphenol A (BPA) modified these effects in the mammary gland...
January 11, 2017: Hormones & Cancer
https://www.readbyqxmd.com/read/28078471/effects-of-estrogen-on-esophageal-function-through-regulation-of-ca-2-related-proteins
#7
Kipung Kim, Dongoh Lee, Changhwan Ahn, Hee Young Kang, Beum-Soo An, Yeon Hee Seong, Eui-Bae Jeung
BACKGROUND: The calcium ion is important for physiological functions in all tissues and organs and essential to many vital functions, including hormone secretion and muscle contraction. The intracellular concentration of calcium is regulated by calcium related proteins such as CaBP-9k, PMCA1, and NCX1. In this study, we investigated the relationship between calcium regulation and esophageal functions such as mucin secretion and smooth muscle contraction. METHODS: To evaluate the influence of sex steroid hormones, immature rats were treated for 3 days with estradiol (E2), progesterone (P4), and their antagonists (ICI 182,780, and RU486)...
January 11, 2017: Journal of Gastroenterology
https://www.readbyqxmd.com/read/28078261/effects-of-aqueous-extracts-of-cynanchum-wilfordii-in-rat-models-for-postmenopausal-hot-flush
#8
Gyuok Lee, Chul-Yung Choi, Woojin Jun
Menopausal hot flushes (HFs), which manifest as a transient increase in skin temperature, occur most frequently in postmenopausal women, and sometimes negatively influence daily life. We investigated the effect of an aqueous extract of Cynanchum wilfordii (CWW) in a rat model of menopausal HFs, where tail skin temperature (TST) is increased after the rapid estrogen decline induced by ovariectomy. Ten-week-old female rats were ovariectomized and treated with CWW for 1 week. We measured TST and rectal temperatures (RT) and investigated serum estradiol...
December 2016: Preventive Nutrition and Food Science
https://www.readbyqxmd.com/read/28077498/modulation-of-shbg-binding-to-testosterone-and-estradiol-by-sex-and-morbid-obesity
#9
Maria Del Mar Grasa, José Gulfo, Núria Camps, Rosa Alcalá, Laura Monserrat, José María Moreno-Navarrete, F Ortega, Montserrat Esteve, Xavier Remesar, José Antonio Fernández-López, José Manuel Fernández-Real, Marià Alemany
OBJECTIVE: Sex hormone-binding globulin (SHBG) binds and transports testosterone and estradiol in plasma. The possibility that SHBG is a mixture of transporting proteins has been postulated. We analyzed in parallel the effects of obesity status on the levels and binding capacity of circulating SHBG and their relationship with testosterone and estradiol. DESIGN: Anthropometric measures and plasma were obtained from apparently healthy young (i.e. 35 ± 7 years) premenopausal women (n=32) and men (n=30), with normal weight and obesity (BMI>30 kg·m(-2))...
January 11, 2017: European Journal of Endocrinology
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
#10
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/28077272/evaluation-of-sodium-arsenite-exposure-on-reproductive-competence-in-pregnant-and-postlactational-dams-and-their-offspring
#11
Nadia Soledad Bourguignon, María Marta Bonaventura, Diego Rodríguez, Marianne Bizzozzero, Clara Ventura, Mariel Nuñez, Victoria Adela Lux-Lantos, Carlos Libertun
We investigated arsenite exposure on the reproductive axis of dams (during pregnancy and at cyclicity resumption) and their offspring. Pregnant rats were exposed to 5 (A5) or 50ppm (A50) of sodium arsenite in drinking water from gestational day 1 (GD1) until sacrifice at GD18 or two months postpartum. Offspring were exposed to the same treatment as their mothers from weaning to adulthood. A50-pregnant rats gained less weight, showed increased testosterone and estradiol but pregnancy was unaffected. After lactation, arsenic-exposed dams presented compromised cyclicity, decreased estradiol, increased follicle-stimulating hormone (FSH), less preovulatory follicles and presence of ovarian cysts, suggesting impaired reproduction...
January 7, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28076330/the-correlation-of-age-with-chemotherapy-induced-ovarian-function-failure-in-breast-cancer-patients
#12
Ingeborg J H Vriens, Ashley J R De Bie, Maureen J B Aarts, Maaike de Boer, Irene E G van Hellemond, Joyce H E Roijen, Ron J T van Golde, Adri C Voogd, Vivianne C G Tjan-Heijnen
PURPOSE: To assess the incidence of chemotherapy-induced ovarian function failure (COFF) based on estradiol and follicle stimulating hormone (FSH) monitoring in premenopausal women with hormone-receptor positive breast cancer treated with second and third generation (neo-)adjuvant chemotherapy. RESULTS: We identified 115 eligible women. Two years after start of chemotherapy, COFF was significantly more often present in women ≥ 40 years (85.6%) as compared to women < 40 years (8...
January 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28074752/removal-of-17%C3%AE-estradiol-in-a-biological-active-carbon-reactor-with-acetic-acid-and-humic-acid
#13
Zhongtian Li
The objective of this study is to characterize the removal of 17β-estradiol (E2) and the microbial community of a biologically active carbon (BAC) reactor under acetic acid or humic acid as the primary carbon source. Influent E2 concentration was maintained at 20 μg/L. Higher than 99 % removal of E2 was achieved by the BAC reactor. E2 concentration increased from below detection limit (<5.8 ng/L) to 48±8 ng/L after switching the primary carbon source from acetic acid to humic acid in the reactor influent...
January 6, 2017: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/28074716/semiquantitative-immunohistochemical-detection-of-progesterone-receptors-in-male-accessory-sex-glands-as-a-screening-assay-for-anabolic-steroid-use-in-bulls
#14
Claudia Zanardello, Katia Capello, Roberto Stella, Giancarlo Biancotto, Marta Vascellari
We investigated the immunohistochemical expression of progesterone receptors (PRs) in the prostate and bulbourethral glands of thirty-two 10-14-mo-old Charolais bulls following treatment with a low dosage of estrogens. Animals were divided into 2 groups: 16 animals (group T) were treated for 71 d with a therapeutic dose of trenbolone acetate and estradiol by subcutaneous implant, 16 animals (group C) received no treatment. Urine samples were collected both at the beginning of the trial and 9 times during the study...
January 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28074679/vitamin-d-treatment-improves-levels-of-sexual-hormones-metabolic-parameters-and-erectile-function-in-middle-aged-vitamin-d-deficient-men
#15
Onder Canguven, Raidh A Talib, Walid El Ansari, Dany-Jan Yassin, Abdullah Al Naimi
BACKGROUND: The associations between serum vitamin D (VD), serum testosterone (TT) and metabolic syndrome are complex and with limited published research, particularly on the effects of VD treatment on sexual hormones, erectile function and the metabolic syndrome. OBJECTIVES: This study assessed whether a monthly high dose VD treatment for 12 months in VD deficient middle-aged men was associated with: changes in levels of sexual hormones, improvement of diabetes control and metabolic syndrome components, better erectile function [International Index of Erectile Function (IIEF)-5 questionnaire]; and changes in a prostate marker...
January 11, 2017: Aging Male: the Official Journal of the International Society for the Study of the Aging Male
https://www.readbyqxmd.com/read/28074436/intrafollicular-inflammatory-cytokines-but-not-steroid-hormone-concentrations-are-increased-in-naturally-matured-follicles-of-women-with-proven-endometriosis
#16
Gengxiang Wu, N A Bersinger, M D Mueller, M von Wolff
PURPOSE: The aim of this study was to assess whether the intrafollicular cytokine profile in naturally developed follicles is different in women with endometriosis, possibly explaining the lower reproductive outcome in endometriosis patients. METHODS: A matched case-control study was conducted at a university-based infertility and endometriosis centre. The study population included 17 patients with laparoscopically and histologically confirmed endometriosis (rAFS stages II-IV), each undergoing one natural cycle IVF (NC-IVF) treatment cycle between 2013 and 2015, and 17 age-matched NC-IVF women without diagnosed endometriosis (control group)...
January 10, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28072417/dopaminergic-dynamics-underlying-sex-specific-cocaine-reward
#17
Erin S Calipari, Barbara Juarez, Carole Morel, Deena M Walker, Michael E Cahill, Efrain Ribeiro, Ciorana Roman-Ortiz, Charu Ramakrishnan, Karl Deisseroth, Ming-Hu Han, Eric J Nestler
Although both males and females become addicted to cocaine, females transition to addiction faster and experience greater difficulties remaining abstinent. We demonstrate an oestrous cycle-dependent mechanism controlling increased cocaine reward in females. During oestrus, ventral tegmental area (VTA) dopamine neuron activity is enhanced and drives post translational modifications at the dopamine transporter (DAT) to increase the ability of cocaine to inhibit its function, an effect mediated by estradiol. Female mice conditioned to associate cocaine with contextual cues during oestrus have enhanced mesolimbic responses to these cues in the absence of drug...
January 10, 2017: Nature Communications
https://www.readbyqxmd.com/read/28071011/the-effects-of-a-low-calorie-diet-or-an-isocaloric-diet-combined-with-metformin-on-sex-hormones-in-obese-women-of-child-bearing-age
#18
Ewelina Swora-Cwynar, Magdalena Kujawska-Łuczak, Joanna Suliburska, Julita Reguła, Angelika Kargulewicz, Matylda Kręgielska-Narożna, Emilia Marcinkowska, Alina Kanikowska, Marzena Bielas, Marian Grzymisławski, Paweł Bogdański
BACKGROUND: The influence of weight loss treatment on sex hormones profile has been studied mainly in women with polycystic ovary syndrome (PCOS), but in obese premenopausal women without PCOS it still remains unclear. The aim of the study was to evaluate the effect of two approaches to obesity treatment on the serum level of sex hormones in obese women of child-bearing age without PCOS. METHODS: 77 obese Caucasian women (aged 31.2 ±8.3 years) were randomized into two groups: 39 women received a low-calorie diet (LC) and 38 received an isocaloric diet plus metformin (IM), for 12 weeks...
April 2016: Acta Scientiarum Polonorum. Technologia Alimentaria
https://www.readbyqxmd.com/read/28069178/outcomes-of-anastrozole-in-oligozoospermic-hypoandrogenic-subfertile-men
#19
Ohad Shoshany, Nikita Abhyankar, Naem Mufarreh, Garvey Daniel, Craig Niederberger
OBJECTIVE: To determine whether the change in sperm parameters in subfertile hypoandrogenic men treated with anastrozole is correlated to the magnitude of increase in testosterone (T) to estrogen ratio in men responding to treatment. DESIGN: Retrospective study. SETTING: Male fertility clinic. PATIENT(S): The study group consisted of 86 subfertile hypoandrogenic men with low T/estradiol (E2) ratio (n = 78) or a prior aversive reaction to clomiphene citrate (n = 8)...
January 6, 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28068644/mitigating-17%C3%AE-ethynylestradiol-water-contamination-through-binding-and-photosensitization-by-dissolved-humic-substances
#20
Dong Ren, Bin Huang, Benqin Yang, Xuejun Pan, Dionysios D Dionysiou
Photodegradation is an important abiotic pathway transforming organic pollutants in natural waters. Humic substances (HS), including humic and fulvic acids, are capable of accelerating the photodegradation of steroid estrogens. However, how the photodegradtion of the emerging pollutants influenced by HS is not clear. Thus, we studied the roles and mechanisms of HS in inducing the photodegradation of 17α-ethynylestradiol (EE2). HS generally induces EE2 photodegradation through binding and reactive species generation...
January 3, 2017: Journal of Hazardous Materials
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