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Oestradiol

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https://www.readbyqxmd.com/read/27899085/oestradiol-levels-and-superoxide-dismutase-activity-in-age-related-cataract-a-case-control-study
#1
Dragana Škiljić, Staffan Nilsson, Anne Petersen, Jan-Olof Karlsson, Anders Behndig, Lada Kalaboukhova, Madeleine Zetterberg
BACKGROUND: It has been suggested that the higher prevalence of cataract in women is caused by a withdrawal effect of oestrogen at menopause. In vitro studies have demonstrated protection of serum oestradiol (E2) against oxidative stress through upregulation of antioxidant enzymes, including superoxide dismutase (SOD). The purpose of the present study was to investigate E2 levels and SOD erythrocyte activity in patients with age-related cataract. METHODS: The studied subjects consisted of 103 patients with age-related cataract and 22 controls...
November 29, 2016: BMC Ophthalmology
https://www.readbyqxmd.com/read/27898110/associations-of-blood-lead-levels-with-reproductive-hormone-levels-in-men-and-postmenopausal-women-results-from-the-spect-china-study
#2
Chi Chen, Ningjian Wang, Hualing Zhai, Xiaomin Nie, Honglin Sun, Bing Han, Qin Li, Yi Chen, Jing Cheng, Fangzhen Xia, Li Zhao, Yanjun Zheng, Zhoujun Shen, Yingli Lu
We examined whether blood lead levels (BLLs) were associated with reproductive hormone levels in a cross-sectional study using data from the SPECT-China study. We selected 2286 men and 1571 postmenopausal women without hormone replacement therapy. BLLs, blood cadmium, total testosterone (TT), oestradiol (E2), luteinizing hormone (LH), follicle stimulating hormone (FSH) and sex hormone binding globulin(SHBG) levels were measured. The results showed that median values (interquartile range) of BLLs were 44.00 μg/L (29...
November 29, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27894940/changes-in-the-mrna-expression-of-structural-proteins-hormone-synthesis-and-secretion-from-bovine-placentome-sections-after-ddt-and-dde-treatment
#3
A Wojciechowska, J Mlynarczuk, J Kotwica
Disorders in the barrier function and secretory activity of the placenta can be caused by xenobiotics (XB) present in the environment and their accumulation in tissues of living organisms. Thus, the aim of this study was to investigate the effect of 1,1,1-trichloro-2,2,-bis-4-chlorophenyl-ethane (DDT) and its metabolite 1,1-dichloro-2,2-bis-4-chlorophenyl-ethene (DDE) (for 24 or 48h) at doses of 1, 10 or 100ng/ml on the function of cow placentome sections in the second trimester of pregnancy. DDT and DDE affected neither (P>0...
November 25, 2016: Toxicology
https://www.readbyqxmd.com/read/27883324/hormone-therapy-reduces-bone-resorption-but-not-bone-formation-in-postmenopausal-athletes
#4
Suzy Y Honisett, David Pagliaro, Kathy Tangalakis, Bronwyn Kingwell, Peter Ebeling, Robyn Craven, Juliana Antonopillai, Vasso Apostolopoulos, Lily Stojanovska
INTRODUCTION: Independently, hormone therapy and exercise have well-established protective effects on bone parameters. The combined effects of hormone therapy and exercise, however, are less clear. We, therefore, examined the effects of hormone therapy on bone turnover markers in postmenopausal women undergoing regular high intensity exercise. METHODS: In a randomised, double blind study, postmenopausal athletes competing at Masters level, received either hormone therapy (50 μg transdermal oestradiol, 5 mg MPA, n = 8) or placebo (n = 7) for 20 weeks...
November 1, 2016: Prilozi (Makedonska Akademija Na Naukite i Umetnostite. Oddelenie za Medicinski Nauki)
https://www.readbyqxmd.com/read/27862950/region-specific-effects-of-oestradiol-on-adipose-derived-stem-cell-differentiation-in-post-menopausal-women
#5
Kimberly A Cox-York, Christopher B Erickson, Rocio I Pereira, Daniel H Bessesen, Rachael E Van Pelt
The goal of this study was to determine the effect of acute transdermal 17β-oestradiol (E2 ) on the adipogenic potential of subcutaneous adipose-derived stem cells (ASC) in post-menopausal women. Post-menopausal women (n = 11; mean age 57 ± 4.5 years) were treated for 2 weeks, in a randomized, cross-over design, with transdermal E2 (0.15 mg) or placebo patches. Biopsies of abdominal (AB) and femoral (FEM) subcutaneous adipose tissue (SAT) were obtained after each treatment and mature adipocytes were analysed for cell size and ASC for their capacity for proliferation (growth rate), differentiation (triglyceride accumulation) and susceptibility to tumour necrosis factor alpha-induced apoptosis...
November 15, 2016: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/27856396/oestrogens-prolactin-hypothalamic-pituitary-gonadal-axis-and-schizophrenic-psychoses
#6
REVIEW
Anita Riecher-Rössler
Interest is growing in the potential effect of gonadal hormones, prolactin, and the hypothalamic-pituitary-gonadal axis in schizophrenic psychoses. Many studies from clinical, epidemiological, and fundamental research have confirmed that oestradiol, the main component of oestrogens, can have protective effects in schizophrenic psychoses. Furthermore, many patients with schizophrenic psychoses-even in the untreated prodromal stages-have hyperprolactinaemia and gonadal dysfunction, with oestrogen deficiency in women and testosterone deficiency in men...
November 11, 2016: Lancet Psychiatry
https://www.readbyqxmd.com/read/27856395/why-are-women-so-vulnerable-to-anxiety-trauma-related-and-stress-related-disorders-the-potential-role-of-sex-hormones
#7
REVIEW
Sophie H Li, Bronwyn M Graham
Increased prevalence, severity, and burden of anxiety, trauma-related and stress-related disorders in women compared with men has been well documented. Evidence from a variety of fields has emerged suggesting that sex hormones, particularly oestradiol and progesterone, play a significant part in generation of these sex differences. In this Series paper, we aim to integrate the literature reporting on the effects of sex hormones on biological, behavioural, and cognitive pathways, to propose two broad mechanisms by which oestradiol and progesterone influence sex differences in anxiety disorders: augmentation of vulnerability factors associated with anxiety disorder development; and facilitation of the maintenance of anxious symptoms post-development...
November 11, 2016: Lancet Psychiatry
https://www.readbyqxmd.com/read/27832828/influence-of-the-inflammatory-status-of-entire-male-pigs-on-their-pubertal-development-and-fat-androstenone
#8
S P Parois, A Faoüen, N Le Floc'h, A Prunier
Androstenone production increases during pubertal development and plays a major role in boar taint. The objective of the present study was to evaluate the effect of a subclinical inflammation on the pubertal development of boars and hence on fat androstenone. Contrasted hygiene conditions were applied during rearing to increase the variability of the inflammatory status. Boars from a commercial cross line were allocated at 139±0.9 days of age (Day 0) and 81.3±5.9 kg of live weight either to Good (n=61) or Poor (n=54) hygiene conditions until slaughter at 172...
November 11, 2016: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/27823750/clinical-audit-of-estradiol-implant-therapy-long-duration-of-action-and-implications-in-non-hysterectomised-women
#9
Shaday Wheatley, Robin J Bell, Bronwyn G A Stuckey, Penelope J Robinson, Susan R Davis
We audited the files of 114 postmenopausal women who had been treated with subcutaneous Estrapel (50mg oestradiol implants). Of the 92 women who received more than one implant, the median number of days between implants was 223.5 (range 49-875), with an estimated median time to return to baseline of 311days (range 108-1228). Although oestradiol implants can provide an excellent non-oral treatment option, their prolonged action makes patient selection important, as the implants cannot easily be removed. In women with an intact uterus, the continuation of progestin therapy after cessation of implant therapy is imperative...
December 2016: Maturitas
https://www.readbyqxmd.com/read/27815569/bone-turnover-predicts-change-in-volumetric-bone-density-and-bone-geometry-at-the-radius-in-men
#10
S R Pye, K A Ward, M J Cook, M R Laurent, E Gielen, H Borghs, J E Adams, S Boonen, D Vanderschueren, F C Wu, T W O'Neill
: Peripheral quantitative computed tomography scans of the distal and midshaft radius were performed in 514 European men aged 40-79 years at baseline and a median of 4.3 years later. Age-related changes in volumetric bone mineral density (vBMD) and bone geometry were greater in men with higher biochemical markers of bone turnover at baseline. INTRODUCTION: This study aimed to determine prospective change in bone density and geometry at the radius in men and examine the influence of bone turnover markers and sex hormones on that change...
November 4, 2016: Osteoporosis International
https://www.readbyqxmd.com/read/27815062/short-term-exposure-of-human-ovarian-follicles-to-cyclophosphamide-metabolites-seems-to-promote-follicular-activation-in-vitro
#11
Yechezkel Lande, Benjamin Fisch, Abraham Tsur, Jacob Farhi, Roni Prag-Rosenberg, Avi Ben-Haroush, Gania Kessler-Icekson, Muayad A Zahalka, Susan M Ludeman, Ronit Abir
How chemotherapy affects dormant ovarian primordial follicles is unclear. The 'burnout' theory, studied only in mice, suggests cyclophosphamide enhances primordial follicle activation. Using 4-hydroperoxycyclophosphamide (4hc) and phosphoramide mustard (PM), this study assessed how the active cyclophosphamide metabolites 4-hydroxycyclophosphamide (4-OHC) and PM, affect human primordial follicles. Frozen-thawed human ovarian samples were sliced and cultured with basic culture medium (cultured controls) or with 4hc/PM (3 µmol/l/10 µmol/l) (treated samples) for 24-48 h...
October 17, 2016: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/27811278/the-effects-of-transdermal-testosterone-and-oestrogen-therapy-on-dry-eye-in-postmenopausal-women-a-randomised-placebo-controlled-pilot-study
#12
Blanka Golebiowski, Noor Badarudin, John Eden, Leanne Gerrand, Jennifer Robinson, Jinzhu Liu, Ulrike Hampel, Jingjing You, Fiona Stapleton
AIMS: Sex hormones could provide a future treatment avenue for dry eye post menopause. However, there are few well-controlled studies. This study investigates the impact of testosterone and oestrogen on dry eye symptoms and signs in postmenopausal women. METHODS: A randomised double-blind placebo-controlled pilot study was conducted involving 40 women with dry eye (age 63.9±5.1 years, 13.2±6.3 years post menopause). Ten women were assigned to each of four treatment groups: transdermal testosterone, oestradiol, testosterone/oestradiol combination and placebo...
November 3, 2016: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/27798296/thyroid-hormone-modulates-offspring-sex-ratio-in-a-turtle-with-temperature-dependent-sex-determination
#13
Bao-Jun Sun, Teng Li, Yi Mu, Jessica K McGlashan, Arthur Georges, Richard Shine, Wei-Guo Du
The adaptive significance of temperature-dependent sex determination (TSD) has attracted a great deal of research, but the underlying mechanisms by which temperature determines the sex of a developing embryo remain poorly understood. Here, we manipulated the level of a thyroid hormone (TH), triiodothyronine (T3), during embryonic development (by adding excess T3 to the eggs of the red-eared slider turtle Trachemys scripta, a reptile with TSD), to test two competing hypotheses on the proximate basis for TSD: the developmental rate hypothesis versus the hormone hypothesis Exogenous TH accelerated embryonic heart rate (and hence metabolic rate), developmental rate, and rates of early post-hatching growth...
October 26, 2016: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/27785823/lactational-exposure-of-polychlorinated-biphenyls-downregulates-critical-genes-in-leydig-cells-of-f1-male-progeny-pnd21
#14
T Sathish Kumar, E Sugantha Priya, P Raja Singh, J Arunakaran
Polychlorinated biphenyls (PCBs) are environmental contaminants. The present study was aimed to test the effect of lactational exposure of PCBs on Leydig cellular mRNA and protein expressions of 5α-reductase, aromatase and androgen receptor (AR) in F1 male offspring. Lactating dams were orally gavaged with different doses of PCBs (Aroclor 1254) 0, 1, 2 and 5 mg kg b.wt(-1)  day(-1) , respectively, from PND1 to PND21. Male offsprings were sacrificed at PND21. Testes were used to isolate Leydig cells. Blood was collected...
October 26, 2016: Andrologia
https://www.readbyqxmd.com/read/27781956/influence-of-a-high-fat-diet-on-cardiac-inos-in-female-rats
#15
Esma R Isenovic, Aleksandra Jovanovic, Emina Sudar Milovanovic, Sudar Milovanovic, Samantha J Pitt, Alan J Stewart, Sonja Zafirovic, Julijana Stanimirovic, Djordje Radak
Overexpression of inducible nitric oxide synthase (iNOS) is a key link between high-fat (HF) diet induced obesity and cardiovascular disease. Oestradiol has cardioprotective effects that may be mediated through reduction of iNOS activity/expression. In the present study, female Wistar rats were fed a standard diet or a HF diet (42% fat) for 10 weeks. iNOS gene and protein expressions were measured in heart tissue. HF-fed rats exhibited a significant increase in cardiac iNOS mRNA by 695% (p<0.05), iNOS protein level by 248% (p<0...
October 25, 2016: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/27779475/maternal-high-fat-diet-during-pregnancy-and-lactation-had-gender-difference-effect-on-adiponectin-in-rat-offspring
#16
E Gregoraszczuk, M Slupecka, J Wolinski, A Hejmej, B Bilinska, E Fiedor, N Piwnicka, A Rak
This study investigated the effect of a high-fat (HF) diet on plasma adiponectin and steroid hormones levels, and the protein expression of adiponectin and its receptors, in the gonads and gonadal (periovarian and epididymal) white adipose tissue (WAT) of dams and their offspring. Female Wistar rats were fed a HF diet (30% fat) or a standard breeding (BD) diet (5% fat) during pregnancy and lactation. At 21 days of lactation, mothers and both sexes of prepubertal offspring were killed by decapitation. Plasma adiponectin, testosterone (T) and oestradiol (E2) levels were analyzed by ELISA...
August 2016: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/27778261/positive-effects-of-qing-e-pill-on-trabecular-microarchitecture-and-its-mechanical-properties-in-osteopenic-ovariectomised-mice
#17
Bo Shuai, Rui Zhu, Yan-Ping Yang, Lin Shen, Xiao-Juan Xu, Chen Ma, Lin Lu
OBJECTIVE: To investigate the impact of Qing'e Pill (, QEP) on the cancellous bone microstructure and its effect on the level of β-catenin in a mouse model of postmenopausal osteoporosis. METHODS: Ninety-six 8-week-old specifific pathogen free C57BL/6 mice were randomly divided into 4 groups (24/group): sham, ovariectomised osteoporosis model, oestradiol-treated, and QEP-treated groups. Three months after surgery, the third lumbar vertebra and left femur of the animals were dissected and scanned using micro-computed tomography (micro-CT) to acquire three-dimensional (3D) parameters of their cancellous bone microstructure...
October 24, 2016: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/27771738/serum-dehydroepiandrosterone-levels-are-associated-with-lower-risk-of-type-2-diabetes-the-rotterdam-study
#18
Adela Brahimaj, Taulant Muka, Maryam Kavousi, Joop S E Laven, Abbas Dehghan, Oscar H Franco
AIMS/HYPOTHESIS: Previous literature documents controversial results for the impact of dehydroepiandrosterone (DHEA) in glucose metabolism. We aimed to assess the associations between serum levels of DHEA and its main derivatives DHEA sulphate (DHEAS) and androstenedione, as well as the ratio of DHEAS to DHEA, and risk of type 2 diabetes. METHODS: We used data on serum levels of DHEA, DHEAS and androstenedione from 5189 middle-aged and elderly men and women from the prospective population-based Rotterdam Study...
October 22, 2016: Diabetologia
https://www.readbyqxmd.com/read/27771155/final-oocyte-maturation-with-two-different-gnrh-agonists-in-antagonist-co-treated-cycles-at-risk-of-ovarian-hyperstimulation-syndrome
#19
Yavuz Emre Şükür, Batuhan Özmen, Elif Didem Özdemir, Mehmet Murat Seval, Erkan Kalafat, Murat Sönmezer, Bülent Berker, Ruşen Aytaç, Cem Somer Atabekoğlu
Triptorelin 0.2 mg and leuprolide 1 mg subcutaneous injections for triggering final follicular maturation were compared in patients with a high risk for ovarian hyperstimulation syndrome (OHSS). Infertile patients treated with GnRH antagonist protocol between January 2014 and March 2016 were recruited. Patients with high serum oestradiol levels on HCG day (>3000 pg/ml) indicating a risk of OHSS consisted of the study groups (A and B). Patients with serum oestradiol levels less than 3000 pg/ml consisted of the control group (C)...
October 17, 2016: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/27753182/quality-of-life-outcomes-from-the-prostate-adenocarcinoma-transcutaneous-hormones-patch-trial-evaluating-luteinising-hormone-releasing-hormone-agonists-versus-transdermal-oestradiol-for-androgen-suppression-in-advanced-prostate-cancer
#20
Duncan C Gilbert, Trinh Duong, Howard G Kynaston, Abdulla A Alhasso, Fay H Cafferty, Stuart D Rosen, Subramanian Kanaga-Sundaram, Sanjay Dixit, Marc Laniado, Sanjeev Madaan, Gerald Collins, Alvan Pope, Andrew Welland, Matthew Nankivell, Richard Wassersug, Mahesh K B Parmar, Ruth E Langley, Paul D Abel
OBJECTIVES: To compare quality-of-life (QoL) outcomes at 6 months between men with advanced prostate cancer receiving either transdermal oestradiol (tE2) or luteinising hormone-releasing hormone agonists (LHRHa) for androgen-deprivation therapy (ADT). PATIENTS AND METHODS: Men with locally advanced or metastatic prostate cancer participating in an ongoing randomised, multicentre UK trial comparing tE2 versus LHRHa for ADT were enrolled into a QoL sub-study. tE2 was delivered via three or four transcutaneous patches containing oestradiol 100 μg/24 h...
October 18, 2016: BJU International
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