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Estrogen replacement

Raffaele Nuzzi, Simona Scalabrin, Alice Becco, Giancarlo Panzica
Aim: Gonadal hormones are essential for reproductive function, but can act on neural and other organ systems, and are probably the cause of the large majority of known sex differences in function and disease. The aim of this review is to provide evidence for this hypothesis in relation to eye disorders and to retinopathies in particular. Methods: Epidemiological studies and research articles were reviewed. Results: Analysis of the biological basis for a relationship between eye diseases and hormones showed that estrogen, androgen, and progesterone receptors are present throughout the eye and that these steroids are locally produced in ocular tissues...
2018: Frontiers in Endocrinology
Roberto Angioli, Daniela Luvero, Grazia Armento, Stella Capriglione, Francesco Plotti, Giuseppe Scaletta, Salvatore Lopez, Roberto Montera, Alessandra Gatti, Giovan Battista Serra, Pierluigi Benedetti Panici, Corrado Terranova
As growing of old women population, menopausal women will also increase: an accurate estimation of postmenopausal population is an essential information for health care providers considering that with aging, the incidence of all cancers is expected to increase. Hormone replacement therapy (HRT) has proven to be highly effective in alleviating menopausal symptoms such as hot flashes, night sweats, dyspareunia, sexual disorders, and insomnia and in preventing osteoporosis. According to preclinical data, estrogen and progesterone are supposed to be involved in the induction and progression of breast and endometrial cancers...
April 2018: Critical Reviews in Oncology/hematology
Stefano Savonitto, Delia Colombo, Francesco Prati
No abstract text is available yet for this article.
February 2018: Journal of Cardiovascular Medicine
Zafer Sahin, Merve Ertas, Barkın Berk, Sevde Nur Biltekin, Leyla Yurttas, Seref Demirayak
Steroidal and non-steroidal aromatase inhibitors target the suppression of estrogen biosynthesis in the treatment of breast cancer. Researchers have increasingly focused on developing non-steroidal derivatives for their potential clinical use avoiding steroidal side-effects. Non-steroidal derivatives generally have planar aromatic structures attached to the azole ring system. One part of this ring system comprises functional groups that inhibit aromatization through the coordination of the haem group of the aromatase enzyme...
February 27, 2018: Bioorganic & Medicinal Chemistry
Mark D Aupperlee, Anastasia Kariagina, Nicole Zaremba, Marc D Basson, Richard C Schwartz, Sandra Z Haslam
Increased proliferation and breast cancer risk has been observed in postmenopausal women receiving estrogen (E) + progestin hormone replacement therapy (HRT). Progestin action is mediated through two progesterone receptor (PR) isoforms, PRA and PRB, with unique transcriptional activity and function. The current study examines hormonal regulation of PR isoforms in the normal postmenopausal human breast and the mechanism by which progestins increase proliferation and breast cancer risk. Archival benign breast biopsies from postmenopausal and premenopausal women, and luminal breast tumor biopsies from postmenopausal women, were analyzed for regulation of PRA and PRB expression by E and E+medroxyprogesterone acetate (MPA)...
March 7, 2018: Translational Oncology
Shanshan Shao, Zhenyu Yao, Jiayu Lu, Yongfeng Song, Zhao He, Chunxiao Yu, Xiaoming Zhou, Lifang Zhao, Jiajun Zhao, Ling Gao
Increasing prevalence of non-alcoholic fatty liver disease (NAFLD) worldwide has necessitated a more thorough understanding of it and expanded the scope of research in this field. Women are more resistant to NAFLD than men despite equal exposure to major risk factors, such as obesity or hyperlipidemia. Female resistance is hormone-dependent, as evidenced by the sharp increase in NAFLD incidence in post-menopausal women who do not take hormone replacement therapy. Here, we found that the estrogen-responsive pituitary hormone prolactin (PRL), through specific PRL receptor (PRLR), down-regulates hepatic triglyceride (TG) accumulation...
March 7, 2018: Biochemical and Biophysical Research Communications
Merve Ertas, Zafer Sahin, Barkin Berk, Leyla Yurttas, Sevde N Biltekin, Seref Demirayak
Drugs used in breast cancer treatments target the suppression of estrogen biosynthesis. During this suppression, the main goal is to inhibit the aromatase enzyme that is responsible for the cyclization and structuring of estrogens either with steroid or non-steroidal-type inhibitors. Non-steroidal derivatives generally have a planar aromatic structure attached to the triazole ring system in their structures, which inhibits hydroxylation reactions during aromatization by coordinating the heme group. Bioisosteric replacement of the triazole ring system and development of aromatic/cyclic structures of the side chain can increase the selectivity for aromatase enzyme inhibition...
March 9, 2018: Archiv der Pharmazie
Ewa Sawicka, Agnieszka Piwowar, Tomasz Musiala, Anna Dlugosz
The interaction of estrogens with environmental toxins in free radicals generation: reactive oxygen species (ROS) or reactive nitrogen species (RNS) which participates in cancerogenesis is not yet recognized. Chromium(VI) is widely present in environment. One of its toxicity pathway is free radicals generation. Estrogens have the ability to scavenge free radicals, but may also act as prooxidants. Both chromium(VI) and estrogens are classified by International Agency for Research on Cancer (IARC) as carcinogens, so synergistic effect seems very dangerous...
May 2017: Acta Poloniae Pharmaceutica
Marzana Chowdhury, David Euhus, Maureen O'Donnell, Tracy Onega, Pankaj K Choudhary, Swati Biswas
PURPOSE: Increased mammographic breast density is a significant risk factor for breast cancer. It is not clear if it is also a risk factor for the development of contralateral breast cancer. METHODS: The data were obtained from Breast Cancer Surveillance Consortium and included women diagnosed with invasive breast cancer or ductal carcinoma in situ between ages 18 and 88 and years 1995 and 2009. Each case of contralateral breast cancer was matched with three controls based on year of first breast cancer diagnosis, race, and length of follow-up...
March 6, 2018: Breast Cancer Research and Treatment
Clinton G Lauritsen, Abigail L Chua, Stephanie J Nahas
PURPOSE OF REVIEW: Menopause is a life-changing event in numerous ways. Many women with migraine hold hope that the transition to the climacteric state will coincide with a cessation or improvement of migraine. This assumption is based mainly on common lay perceptions as well as assertions from many in the healthcare community. Unfortunately, evidence suggests this is far from the rule. Many women turn to a general practitioner or a headache specialist for prognosis and management. A natural instinct is to manipulate the offending agent, but in some cases, this approach backfires, or the concern for adverse events outweighs the desire for a therapeutic trial, and other strategies must be pursued...
March 6, 2018: Current Treatment Options in Neurology
Sridhar Vajapeyam, Kirsten Ecklund, Robert V Mulkern, Henry A Feldman, Jennifer M O'Donnell, Amy D DiVasta, Clifford J Rosen, Catherine M Gordon
PURPOSE: Dehydroepiandrosterone (DHEA)+estrogen/progestin therapy for adolescent girls with anorexia nervosa (AN) has the potential to arrest bone loss. The primary aim of this study was to test the effects of DHEA+estrogen/progestin therapy in adolescent girls with AN on bone marrow in the distal femur using magnetic resonance imaging (MRI) and spectroscopy. METHODS: Seventy adolescent girls with AN were enrolled in a double blind, randomized, placebo-controlled trial at two urban hospital-based programs...
February 26, 2018: Bone
Aneta Monika Gawlik, Magdalena Hankus, Kamila Szeliga, Aleksandra Antosz, Tomasz Gawlik, Kamil Soltysik, Agnieszka Drosdzol-Cop, Krzysztof Wilk, Grzegorz Kudela, Tomasz Koszutski, Ewa Malecka-Tendera
Objective: Estrogen replacement therapy (ERT) for Turner syndrome (TS) is a widely discussed topic; however, the optimal model of ERT for patients with delayed diagnosis and/or initiation of therapy is still unclear, mainly due to insufficient data. We present the results of a prospective observational single-center study in which the efficacy of late-onset puberty induction by one-regimen transdermal ERT in TS girls was evaluated. Methods: The analysis encompassed 49 TS girls (63...
2018: Frontiers in Endocrinology
Elina Holopainen, Svetlana Vakkilainen, Outi Mäkitie
BACKGROUND: Cartilage-hair hypoplasia (CHH) is a rare chondrodysplasia, including disproportionate short stature, hypoplastic hair, immunodeficiency and increased risk of malignancies. Absent pubertal growth spurt and absent pubic hair complicate monitoring of pubertal development in these patients. CASES: Two CHH patients with delayed puberty and excessive growth failure are described. One of the girls had hypogonadotropic hypogonadism while the other had hypo-normogonadotropic hypogonadism with no spontaneous pubertal development and slow response to estrogen therapy, both requiring permanent replacement therapy...
February 17, 2018: Journal of Pediatric and Adolescent Gynecology
Hee Kyung Park, Sindana Ilango, Christina M Charriez, Harvey Checkoway, David Riley, David G Standaert, Yvette Bordelon, David R Shprecher, Stephen G Reich, Deborah Hall, Benzi Kluger, Connie Marras, Joseph Jankovic, Richard Dubinsky, Irene Litvan
BACKGROUND: Studies suggesting a protective effect of estrogen in neurodegenerative diseases prompted us to investigate this relationship in progressive supranuclear palsy (PSP). METHODS: This case-control study evaluated the self-reported reproductive characteristics and estrogen of 150 women with PSP and 150 age-matched female controls who participated in the Environmental Genetic-PSP study. Conditional logistic regression models were generated to examine associations of PSP with estrogen...
February 20, 2018: Movement Disorders: Official Journal of the Movement Disorder Society
Myungsuk Kim, Jisun Lim, Jung-Hee Lee, Kyung-Mi Lee, Suji Kim, Kye Won Park, Chu Won Nho, Yoon Shin Cho
Genistein, a phyto-estrogen, can potentially replace endogenous estrogens in postmenopausal women, but the underlying molecular mechanisms remain incompletely understood. To obtain insight into the effect of genistein on bone differentiation, RNA sequencing (RNA-seq) analysis was used to detect differentially expressed genes (DEGs) in genistein-treated vs. untreated MC3T3-E1 mouse osteoblastic cells. Osteoblastic cell differentiation was monitored by measuring osteoblast differentiation factors (ALP production, bone mineralization, and expression of osteoblast differentiation markers)...
February 19, 2018: Scientific Reports
Jikai Zhao, Chen Bian, Mengying Liu, Yangang Zhao, Tao Sun, Fangzhou Xing, Jiqiang Zhang
Hippocampal synaptic plasticity is the basis of spatial memory and cognition and is strongly regulated by both testicular androgens (testosterone, T) and hippocampal estrogens (17β-estradiol, E2) converted from T by aromatase, which is inhibited by letrozole (LET), but the contribution of each pathway to spatial memory and the associated mechanisms are unclear. In this study, we first used orchiectomy (ORX) and LET injection to investigate the effects of T and hippocampal E2 on spatial memory and hippocampal synaptic plasticity...
February 13, 2018: Journal of Steroid Biochemistry and Molecular Biology
Karen O Klein, Robert Rosenfield, Richard J Santen, Aneta Gawlik, Philippe Backeljauw, Claus H Gravholt, Theo Sas, Nelly Mauras
Context: Most girls with Turner Syndrome have hypergonadotropic hypogonadism and need hormonal replacement - for induction of puberty and later maintaining secondary sex characteristics, attaining peak bone mass, and uterine growth. The optimal estrogen replacement regimen is still being studied. Evidence Acquisition: We conducted a systematic search of PubMed for research related to TS and puberty, including key words: estrogen, growth, puberty. Evidence Synthesis: The goals of replacement are to mimic normal timing and progression of physical and social development while minimizing risks...
February 8, 2018: Journal of Clinical Endocrinology and Metabolism
Gustav Andersson, Signe Borgquist, Karin Jirström
The incidence of pancreatic cancer is levelling between sexes. Smoking, high age and heredity are established risk factors, but evidence regarding the influence of hormonal factors is unclear. In this study, we investigated the associations of reproductive factors, use of oral contraceptives (OC) and hormone replacement therapy (HRT) with pancreatic cancer risk in the Malmö Diet and Cancer Study, a prospective, population-based cohort encompassing 17 035 women. Up until December 31 st 2015, 110 women were identified with incident pancreatic cancer through the Swedish Cancer Registry...
February 9, 2018: International Journal of Cancer. Journal International du Cancer
Reeta Kangas, Cristina Morsiani, Grazia Pizza, Catia Lanzarini, Pauliina Aukee, Jaakko Kaprio, Sarianna Sipilä, Claudio Franceschi, Vuokko Kovanen, Eija K Laakkonen, Miriam Capri
Tissue-specific effects of 17β-estradiol are delivered via both estrogen receptors and microRNAs (miRs). Menopause is known to affect the whole-body fat distribution in women. This investigation aimed at identifying menopause- and hormone replacement therapy (HRT)-associated miR profiles and miR targets in subcutaneous abdominal adipose tissue and serum from the same women. A discovery phase using array technology was performed in 13 women, including monozygotic twin pairs discordant for HRT and premenopausal young controls...
January 5, 2018: Oncotarget
Fiona E Watt
Musculoskeletal pain, arthralgia and arthritis are all more common in women, and their frequency increases with age and in some appears to be associated with the onset of menopause. The clinical assessment, investigation and management of women presenting with musculoskeletal pain, arthralgia or arthritis at the time of menopause are reviewed. Common causes of arthralgia and arthritis in this population are discussed. The epidemiological and trials evidence for the effects of hormone replacement therapy on musculoskeletal pain and arthritis (primarily from RCTs of HRT for other menopausal symptoms) are discussed...
January 1, 2018: Post Reproductive Health
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