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Estrogen replacement

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https://www.readbyqxmd.com/read/29354618/the-effect-of-estrogen-replacement-therapy-on-visceral-fat-serum-glucose-lipid-profiles-and-apelin-level-in-ovariectomized-rats
#1
Parvin Babaei, Adele Dastras, Bahram Soltani Tehrani, Shiva Pourali Roudbaneh
Objectives: Ovarian hormones have been shown to regulate body weight, intra-abdominal fat accumulation and plasma level of cytokines. The aim of this study was to investigate the effect of estrogen replacement therapy on visceral adipose tissue, plasma level of apelin, lipid profiles, and glucose in ovariectomized (OVX) rats. Methods: Thirty female Wistar rats were divided into OVX (n = 20) and sham (n = 10) groups. OVX rats were subdivided into estrogen replacement therapy (OVX+est; n = 10) receiving 17 β-estradiol valerates (30 µg/kg, s...
December 2017: Journal of Menopausal Medicine
https://www.readbyqxmd.com/read/29347814/-customization-of-hormonal-contraception
#2
Vincenzo DE Leo, Antonio Cianci, Costantino DI Carlo, Valentina Cappelli, Franca Fruzzetti
In the last few years new oral contraceptives have been marketed showing a better safety profile for women. They are the result of important changes made to the old compounds. As far as the estrogenic component, with the aim of decreasing side effects, the dose of ethinyl estradiol has been reduced and synthetic estrogens have been replaced by natural estradiol, further improving the safety profile. Also the progestin component in the last years has been changed in terms of dose, endocrine and metabolic characteristics...
February 2018: Minerva Ginecologica
https://www.readbyqxmd.com/read/29339527/diminished-androgen-and-estrogen-receptors-and-aromatase-levels-in-hypogonadal-diabetic-men-reversal-with-testosterone
#3
Husam Ghanim, Sandeep Dhindsa, Sanaa Abuaysheh, Manav Batra, Nitesh Kuhadiya, Antoine Makdissi, Ajay Chaudhuri, Paresh Dandona
AIMS: One third of males with type 2 diabetes have hypogonadism, characterized by low total and free testosterone concentrations. We hypothesized that this condition is associated with a compensatory increase in the expression of androgen receptors (AR) and that testosterone replacement reverses these changes. We also measured estrogen receptor and aromatase expression. MATERIALS AND METHODS: This is a randomized double-blind placebo controlled trial. 32 hypogonadal and 32 eugonadal men with type 2 diabetes were recruited...
January 16, 2018: European Journal of Endocrinology
https://www.readbyqxmd.com/read/29313089/first-delivery-and-ovariectomy-affect-biomechanical-and-structural-properties-of-the-vagina-in-the-ovine-model
#4
Iva Urbankova, Geertje Callewaert, Silvia Blacher, Dries Deprest, Lucie Hympanova, Andrew Feola, Laurent De Landsheere, Jan Deprest
INTRODUCTION AND HYPOTHESIS: Animal models are useful for investigating the genesis of pelvic floor dysfunction and for developing novel therapies for its treatment. There is a need for an alternative large-animal model to the nonhuman primate. Therefore we studied the effects of the first vaginal delivery, ovariectomy and systemic hormonal replacement therapy (HRT) on the biomechanical and structural properties of the ovine vagina. METHODS: We examined the gross anatomical properties of nulliparous, primiparous, ovariectomized multiparous, and ovariectomized hormone-replaced multiparous sheep (six animals per group)...
January 8, 2018: International Urogynecology Journal
https://www.readbyqxmd.com/read/29302853/progesterone-receptor-pgr-gene-variants-associated-with-breast-cancer-and-associated-features-a-case-control-study
#5
Rabeb M Ghali, Maryam A Al-Mutawa, Bashayer H Ebrahim, Hanen H Jrah, Sonia Zaied, Hanen Bhiri, Fahmi Hmila, Touhami Mahjoub, Wassim Y Almawi
Insofar as altered estrogen receptor-progesterone receptor (PR) expression contribute to breast cancer pathogenesis, previous studies examined the association of genetic variation in PR gene (PGR) with breast cancer, but with mixed outcome. We evaluated the association between PGR variants, and breast cancer and associated features. A retrospective case-control study involving 183 female breast cancer patients, and 222 control women. PGR genotyping was done by real-time PCR. Minor allele frequencies of rs1042838, rs590688, and rs10895068 PGR gene polymorphisms were significantly higher in breast cancer patients compared to controls...
January 4, 2018: Pathology Oncology Research: POR
https://www.readbyqxmd.com/read/29301182/diagnostic-and-therapeutic-considerations-in-turner-syndrome
#6
REVIEW
Seung Yang
Newly developed genetic techniques can reveal mosaicism in individuals diagnosed with monosomy X. Noninvasive prenatal diagnosis using maternal blood can detect most fetuses with X chromosome abnormalities. Low-dose and ultralow-dose estrogen replacement therapy can achieve a more physiological endocrine milieu. However, many complicated and controversial issues with such treatment remain. Therefore, lifetime observation, long-term studies of health problems, and optimal therapeutic plans are needed for women with Turner syndrome...
December 2017: Annals of Pediatric Endocrinology & Metabolism
https://www.readbyqxmd.com/read/29295935/estrogen-dependent-epigenetic-regulation-of-soluble-epoxide-hydrolase-via-dna-methylation
#7
Yang-Ming Yang, Dong Sun, Sharath Kandhi, Ghezal Froogh, Jian Zhuge, Weihua Huang, Bruce D Hammock, An Huang
To elucidate molecular mechanisms responsible for the sexually dimorphic phenotype of soluble epoxide hydrolase (sEH) expression, we tested the hypothesis that female-specific down-regulation of sEH expression is driven by estrogen-dependent methylation of the Ephx2 gene. Mesenteric arteries isolated from male, female, ovariectomized female (OV), and OV with estrogen replacement (OVE) mice, as well as the human cell line (HEK293T) were used. Methylation-specific PCR and bisulfite genomic sequencing analysis indicate significant increases in DNA/CG methylation in vessels of female and OVE compared with those of male and OV mice...
January 2, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29276969/effects-of-estrogen-status-in-osteocyte-autophagy-and-its-relation-to-osteocyte-viability-in-alveolar-process-of-ovariectomized-rats
#8
Rinaldo Florencio-Silva, Gisela R S Sasso, Estela Sasso-Cerri, Manuel J Simões, Paulo S Cerri
Estrogen maintains osteocyte viability, whereas its deficiency induces osteocyte apoptosis. As autophagy is important for osteocyte viability, we hypothesized whether the anti-apoptotic effect of estrogen is related to autophagy in osteocytes. Thirty adult female rats were sham-operated (SHAM) or ovariectomized (OVX). After three weeks, twelve rats of SHAM and OVX groups were killed before treatment (basal period), whereas the remaining rats received estrogen (OVXE) or vehicle (OVX) for 45 days. Fragments of maxilla containing alveolar process of the first molars were embedded in paraffin or Araldite...
December 22, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29261303/the-toxic-effects-of-bisphenol-s-showing-immunomodulation-in-fish-macrophages
#9
Wenhui Qiu, Ming Yang, Shuai Liu, Penghui Lei, Lei Hu, Bei Chen, Minghong Wu, Kejian Wang
Bisphenol S (BPS), a structural analogue of bisphenol A (BPA), has been increasingly used as a common replacement of BPA due to health concern regarding the former. However, mounting evidence suggests that BPS has similar endocrine-disrupting effects as BPA, and likewise its presence in the environment may pose considerable risks to ecosystem and human health. Using fish primary macrophages (fpMQs), we here evaluated the immunomodulatory effects of BPS and its mechanisms of action associated with estrogen receptors (ERs)...
December 20, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29259465/is-human-chorionic-gonadotropin-supplementation-beneficial-for-frozen-and-thawed-embryo-transfer-in-estrogen-progesterone-replacement-cycles-a-randomized-clinical-trial
#10
Masahide Shiotani, Yukiko Matsumoto, Eri Okamoto, Satoshi Yamada, Yuri Mizusawa, Kohyu Furuhashi, Hiromi Ogata, Seiji Ogata, Shoji Kokeguchi
Aim: Human chorionic gonadotropin (hCG) is used frequently for luteal support in fresh in vitro fertilization cycles as it induces progesterone secretion from the ovaries after oocyte retrieval and modulates the endometrium for implantation in fresh cycles. In contrast, hCG is not usually used for the transfer of cryopreserved-thawed embryos in estrogen/progesterone replacement cycles because ovulation is suppressed. However, several studies have shown that luteinizing hormone and hCG receptors are present in the human endometrium and that hCG can directly induce the decidualization of endometrial stromal cells in vitro...
April 2017: Reproductive Medicine and Biology
https://www.readbyqxmd.com/read/29246927/disruption-of-interneuron-neurogenesis-in-premature-newborns-and-reversal-with-estrogen-treatment
#11
Mahima Tibrewal, Bokun Cheng, Preeti Dohare, Furong Hu, Rana Mehdizadeh, Ping Wang, Deyou Zheng, Zoltan Ungvari, Praveen Ballabh
Preterm-born children suffer from neurobehavioral disorders. Premature birth terminates the hypoxic in utero environment and supply of maternal hormones. As the production of interneurons continues until the end of pregnancy, we hypothesized that premature birth would disrupt interneuron production and restoration of the hypoxic milieu or estrogen treatment might reverse interneuron generation. To test these hypotheses, we quantified interneuronal progenitors in the medial, lateral, and caudal ganglionic eminences (MGE, LGE, and CGE) of preterm- (E29 at D3 and D7) vs...
December 15, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29246152/linking-physiologically-based-pharmacokinetic-and-genome-scale-metabolic-networks-to-understand-estradiol-biology
#12
Joanna H Sier, Alfred E Thumser, Nick J Plant
BACKGROUND: Estrogen is a vital hormone that regulates many biological functions within the body. These include roles in the development of the secondary sexual organs in both sexes, plus uterine angiogenesis and proliferation during the menstrual cycle and pregnancy in women. The varied biological roles of estrogens in human health also make them a therapeutic target for contraception, mitigation of the adverse effects of the menopause, and treatment of estrogen-responsive tumours. In addition, endogenous (e...
December 15, 2017: BMC Systems Biology
https://www.readbyqxmd.com/read/29238465/genistein-preserves-the-lungs-of-ovariectomized-diabetic-rats-addition-to-apoptotic-and-inflammatory-markers-in-the-lung
#13
Faeze Daghigh, Alireza Alihemmati, Pouran Karimi, Parisa Habibi, Naser Ahmadiasl
Objectives: The role of isoflavones in pulmonary structure and function during menopause is not well studied. Moreover, the important role of estrogen in the physiological function of respiratory system has been revealed. Genistein, as an isoflavone, mimics estrogenic in diabetic and ovariectomized rats. Here, we hypothesized that genistein would reverse changes in the protein expression levels related to estrogen deficiency in the lung of ovariectomized diabetic rats. Materials and Methods: Wistar female rats were assigned to four experimental groups (n=10 in each group): sham, rats underwent laparotomy without removing the ovaries; OVX, rats that underwent ovariectomy; OVX...
December 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29226152/the-phytoestrogen-genistein-produces-similar-effects-as-17%C3%AE-estradiol-on-anxiety-like-behavior-in-rats-at-12-weeks-after-ovariectomy
#14
Juan Francisco Rodríguez-Landa, Jonathan Cueto-Escobedo, Abraham Puga-Olguín, Eduardo Rivadeneyra-Domínguez, Blandina Bernal-Morales, Emma Virginia Herrera-Huerta, Andrea Santos-Torres
The phytoestrogen genistein produces anxiolytic-like effects in ovariectomized rats, which highlights its potential therapeutic effect in ameliorating anxiety in surgical menopausal women. However, no studies have directly compared the effects of identical doses of genistein and 17β-estradiol, the main estrogen used in hormone replacement therapy in menopausal women. The present study evaluated the anxiolytic-like effects of identical doses of genistein and 17β-estradiol (0.045, 0.09, and 0.18 mg/kg/7 days, s...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29224099/the-role-of-skeletal-muscle-estrogen-receptors-in-metabolic-homeostasis-and-insulin-sensitivity
#15
Andrea L Hevener, Zhenqi Zhou, Brian G Drew, Vicent Ribas
Women in the modern era are challenged with facing menopausal symptoms as well as heightened disease risk associated with increasing adiposity and metabolic dysfunction for up to three decades of life. Treatment strategies to combat metabolic dysfunction and associated pathologies have been hampered by our lack of understanding regarding the biological causes of these clinical conditions and our incomplete understanding regarding the effects of estrogens and the tissue-specific functions and molecular actions of its receptors...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29212933/characterization-of-an-influenza-virus-pseudotyped-with-ebolavirus-glycoprotein
#16
Julie Xiao, Pramila Rijal, Lisa Schimanski, Arun Kumar Tharkeshwar, Edward Wright, Wim Annaert, Alain Townsend
We have produced a new Ebola virus pseudotype: E-S-FLU, which can be handled in biosafety level-1/2 containment for laboratory analysis. E-S-FLU is a single cycle influenza virus coated with Ebolavirus glycoprotein, and it encodes enhanced green fluorescence protein as a reporter that replaces the influenza haemagglutinin. MDCK-SIAT1 cells were transduced to express Ebolavirus glycoprotein as a stable transmembrane protein for E-S-FLU production. Infection of cells by E-S-FLU was dependent on Niemann-Pick C1 protein, which is the well-characterized receptor for Ebola virus entry at the late endosome/lysosome membrane...
December 6, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29206779/concentration-range-of-serum-sex-steroids-in-normal-postmenopausal-women-and-those-with-diagnosis-of-vulvovaginal-atrophy
#17
Yuyong Ke, Alain Bélanger, Jean-Nicolas Simard, Renaud Gonthier, Céline Martel, Mario Vaillancourt, Fernand Labrie
OBJECTIVE: The aim of the study was to determine the range of serum sex-related steroids in normal postmenopausal women and in women of the same age with a diagnosis of vulvovaginal atrophy (VVA). METHODS: Validated mass spectrometry-based assays coupled to gas or liquid chromatography were used over a 10-year period for steroid measurements. Serum samples were obtained in up to 1,512 women aged 55 to 65 years. RESULTS: Serum estrone sulfate (E1S) and androsterone glucuronide (ADT-G), the main metabolites of estrogens and androgens, respectively, were 16...
December 4, 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/29199166/which-drugs-are-risk-factors-for-the-development-of-gastroesophageal-reflux-disease
#18
Zeynel Mungan, Binnur Pınarbaşı Şimşek
Gastroesophageal reflux disease (GERD), which is common in many communities, is associated with structural factors, eating habits, and the use of certain drugs. The use of such drugs can lead to the emergence of GERD and can also exacerbate existing reflux symptoms. These drugs can contribute to GERD by directly causing mucosal damage, by reducing lower esophageal sphincter pressure (LESP), or by affecting esophagogastric motility. In this article, we report our investigation of the relationships between GERD and medications within the scope of the "Turkish GERD Consensus Group...
December 2017: Turkish Journal of Gastroenterology: the Official Journal of Turkish Society of Gastroenterology
https://www.readbyqxmd.com/read/29196616/17%C3%AE-estradiol-sensitizes-ovarian-surface-epithelium-to-transformation-by-suppressing-disabled-2-expression
#19
Nhung H Vuong, Omar Salah Salah, Barbara C Vanderhyden
Estrogen replacement therapy increases the risk of human ovarian cancer and exogenous estradiol accelerates the onset of ovarian cancer in mouse models. This study uses primary cultures of mouse ovarian surface epithelium (OSE) to demonstrate that one possible mechanism by which estrogen accelerates the initiation of ovarian cancer is by up-regulation of microRNA-378 via the ESR1 pathway to result in the down-regulation of a tumour suppressor called Disabled-2 (Dab2). Estrogen suppression of Dab2 was reproducible in vivo and across many cell types including mouse oviductal epithelium and primary cultures of human ovarian cancer cells...
December 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29194818/rapid-non-genomic-modulation-by-neurosteroids-of-dendritic-spines-in-the-hippocampus-androgen-estrogen-and-corticosteroid
#20
REVIEW
Gen Murakami, Yasushi Hojo, Asami Kato, Yoshimasa Komatsuzaki, Shigeo Horie, Mika Soma, Jonghyuk Kim, Suguru Kawato
Memories are stored in synapses which consist of axon terminals and dendritic spines. Dendritic spines are postsynaptic structures of synapses and essential for synaptic plasticity and cognition. Therefore, extensive investigations about functions and structures of spines have been performed. Sex steroids and stress steroids have been shown to modulate hippocampal synapses. Although rapid modulatory action of sex steroids on synapses has been studied in hippocampal neurons over several decades, its essential molecular mechanisms have not been fully understood...
December 1, 2017: Journal of Neuroendocrinology
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