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https://www.readbyqxmd.com/read/28430630/estrogen-and-androgen-converting-enzymes-17%C3%AE-hydroxysteroid-dehydrogenase-and-their-involvement-in-cancer-with-a-special-focus-on-17%C3%AE-hydroxysteroid-dehydrogenase-type-1-2-and-breast-cancer
#1
REVIEW
Erik Hilborn, Olle Stål, Agneta Jansson
Sex steroid hormones such as estrogens and androgens are involved in the development and differentiation of the breast tissue. The activity and concentration of sex steroids is determined by the availability from the circulation, and on local conversion. This conversion is primarily mediated by aromatase, steroid sulfatase, and 17β-hydroxysteroid dehydrogenases. In postmenopausal women, this is the primary source of estrogens in the breast. Up to 70-80% of all breast cancers express the estrogen receptor-α, responsible for promoting the growth of the tissue...
February 20, 2017: Oncotarget
https://www.readbyqxmd.com/read/28412653/the-relationship-between-dioxins-exposure-and-risk-of-prostate-cancer-with-steroid-hormone-and-age-in-vietnamese-men
#2
Xian Liang Sun, Teruhiko Kido, Seijiro Honma, Eitetsu Koh, Rie Okamoto, Ho Dung Manh, Shoko Maruzeni, Muneko Nishijo, Hideaki Nakagawa, Takeshi Nakano, Takumi Takasuga, Dang Duc Nhu, Nguyen Ngoc Hung, Le Ke Son
Although Vietnam's massive herbicide exposure in 1960s and 1970s was clearly injurious to health, not all causal relationships have been clarified. We therefore explored associations among dioxins, steroid hormones, age and prostate cancer risk in men. We compared serum levels of dioxin, steroid hormones and prostate specific antigen (PSA) in men aged 56-81years from herbicide-exposed hotspots (n=50) with those from non-sprayed regions (n=48). Mean serum levels of dioxin congeners in the hotspot group were 1...
April 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28410957/fetal-alpha-5-reductase-val89leu-mutation-is-associated-with-late-miscarriage
#3
Beatriz Pérez-Nevot, Jose-Luis Royo, Miriam Cortés, Ana M Lendínez, Arturo Reyes-Palomares, Ana-José Jiménez, Maximiliano Ruiz-Galdón, Armando Reyes-Engel
The present study was undertaken to determine the role of different polymorphisms affecting the testosterone/oestrogen pathway in miscarriage. Alpha 5-reductase (SRD5A2) rs523349 and rs9282858, cytochrome P450 aromatase (CYP19A1) rs4646, rs10046 and rs2236722 and oestrogen receptor (ESR1) rs9340799, rs2234693 and rs6932902 polymorphisms were selected. The case group consisted of 94 samples of formalin-fixed and paraffin-embedded fetal tissue from a miscarriage at ≤24 weeks. The control group comprised a population of 331 young healthy subjects...
March 21, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28408350/neuroactive-steroid-levels-and-psychiatric-and-andrological-features-in-post-finasteride-patients
#4
Roberto Cosimo Melcangi, Daniele Santi, Roberto Spezzano, Maria Grimoldi, Tommaso Tabacchi, Maria Letizia Fusco, Silvia Diviccaro, Silvia Giatti, Giuseppe Carrà, Donatella Caruso, Manuela Simoni, Guido Cavaletti
Recent reports show that, in patients treated with finasteride for male pattern hair loss, persistent side effects including sexual side effects, depression, anxiety and cognitive complaints may occur. We here explored the psychiatric and andrological features of patients affected by post-finasteride syndrome (PFS) and verified whether the cerebrospinal fluid (CSF) and plasma levels of neuroactive steroids (i.e., important regulators of nervous function) are modified. We found that eight out of sixteen PFS male patients considered suffered from a DSM-IV major depressive disorder (MDD)...
April 10, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28407665/enhanced-inflammation-without-impairment-of-insulin-signaling-in-the-visceral-adipose-tissue-of-5%C3%AE-dihydrotestosterone-induced-animal-model-of-polycystic-ovary-syndrome
#5
Danijela Vojnović Milutinović, Marina Nikolić, Nataša Veličković, Ana Djordjevic, Biljana Bursać, Jelena Nestorov, Ana Teofilović, Ivana Božić Antić, Jelica Bjekić Macut, Abdulbaset Shirif Zidane, Gordana Matić, Djuro Macut
Polycystic ovary syndrome is a heterogeneous endocrine and metabolic disorder associated with abdominal obesity, dyslipidemia and insulin resistance. Since abdominal obesity is characterized by low-grade inflammation, the aim of the study was to investigate whether visceral adipose tissue inflammation linked to abdominal obesity and dyslipidemia could lead to impaired insulin sensitivity in the animal model of polycystic ovary syndrome.Female Wistar rats were treated with nonaromatizable 5α-dihydrotestosterone pellets in order to induce reproductive and metabolic characteristics of polycystic ovary syndrome...
April 13, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28404691/exemestane-and-its-active-metabolite-17-hydroexemestane-induce-udp-glucuronosyltransferase-ugt-2b17-expression-in-breast-cancer-cells
#6
Apichaya Chanawong, Peter Ian Mackenzie, Ross A McKinnon, Dong Gui Hu, Robyn Meech
Exemestane (EXE) is an aromatase inhibitor indicated for endocrine therapy of breast cancer in post-menopausal women. The primary active metabolite of EXE, 17-hydroexemestane (17-HE), is inactivated via glucuronidation, mainly by UGT2B17. UGT2B17 also has a primary role in inactivation of endogenous androgens testosterone and dihydrotestosterone (DHT) and may play an important role in regulation of breast and prostate tumour intracrinology. We recently reported that UGT2B17 could be induced by both estrogenic and androgenic ligands in breast cancer cells via binding of the estrogen receptor alpha (ERα) or the androgen receptor (AR) to a complex regulatory unit in the proximal UGT2B17 promoter...
April 12, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28403781/design-synthesis-and-biological-evaluation-of-novel-1-3-thiazolidine-2-4-diones-as-anti-prostate-cancer-agents
#7
Ramakrishnan Elancheran, Kuppusamy Saravanan, Selvaraj Divakar, Sima Kumari, V Lenin Maruthanila, Senthamarikannan Kabilan, Muthaiah Ramanathan, Rajlakshmi Devi, Jibon Kotoky
Androgen receptor (AR) is an attractive target for the treatment of prostate cancer. Structural modification and molecular docking-based virtual screening approaches were imposed to identify the novel 1,3-thiazolidine-2,4-diones (TZDs) by using Schrödinger (Maestro 9.5). The best fit molecules (3-12 & 23-31) were synthesized and characterized using spectroscopic techniques, then in vitro antioxidant and anti-prostate cancer activities were evaluated. Further, the structure of the intermediate (18) was confirmed by single crystal XRD analysis...
April 12, 2017: Anti-cancer Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/28396101/the-effectiveness-of-treatments-for-androgenetic-alopecia-a-systematic-review-and-meta-analysis
#8
REVIEW
Areej Adil, Marshall Godwin
BACKGROUND: Androgenetic alopecia, or male pattern hair loss, is a hair loss disorder mediated by dihydrotestosterone, the potent form of testosterone. Currently, minoxidil and finasteride are Food and Drug Administration (FDA)-approved, and HairMax LaserComb, which is FDA-cleared, are the only treatments recognized by the FDA as treatments of androgenetic alopecia. OBJECTIVE: This systematic review and meta-analysis assesses the efficacy of nonsurgical treatments of androgenetic alopecia in comparison to placebo for improving hair density, thickness, growth (defined by an increased anagen:telogen ratio), or subjective global assessments done by patients and investigators...
April 7, 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28395892/associations-of-sex-hormones-with-surface-electrocardiogram-j-point-amplitude-in-healthy-volunteers
#9
David A McNamara, Jason Ng, Leonard Ilkhanoff, Andi Schaechter, Jeffrey J Goldberger, Alan H Kadish
Gender differences in J point height exist. Previous studies suggest male sex hormones mediate effects on cardiovascular disease through myocardial repolarization. Our objective was to assess whether male and female sex hormones are associated with J point amplitude in healthy subjects. We conducted a cross-sectional study of 475 healthy, mixed racial population of men, and premenopausal women (age 33 ± 9 years, 56% male). Baseline J point amplitude (JPA) was obtained from continuous surface electrocardiograms...
March 15, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28386843/differential-expression-of-ap-1-transcription-factors-in-human-prostate-lncap-and-pc-3-cells-role-of-fra-1-in-transition-to-crpc-status
#10
K Kavya, M Naveen Kumar, Rajeshwari H Patil, Shubha M Hegde, K M Kiran Kumar, Rashmi Nagesh, R L Babu, Govindarajan T Ramesh, S Chidananda Sharma
Androgen receptor (AR) signaling axis plays a vital role in the development of prostate and critical in the progression of prostate cancer. Androgen withdrawal initially regresses tumors but eventually develops into aggressive castration-resistant prostate cancer (CRPC). Activator Protein-1 (AP-1) transcription factors are most likely to be associated with malignant transformation in prostate cancer. Hence, to determine the implication of AR and AP-1 in promoting the transition of prostate cancer to the androgen-independent state, we used AR-positive LNCaP and AR-negative PC-3 cells as an in vitro model system...
April 6, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28381250/transcriptional-signatures-of-steroid-hormones-in-the-striatal-neurons-and-astrocytes
#11
Marcin Piechota, Michał Korostynski, Slawomir Golda, Joanna Ficek, Danuta Jantas, Ziolkowska Barbara, Ryszard Przewlocki
BACKGROUND: The mechanisms of steroids actions in the brain mainly involve the binding and nuclear translocation of specific cytoplasmic receptors. These receptors can act as transcription factors and regulate gene expression. However, steroid-dependent transcriptional regulation in different types of neural cells is not yet fully understood. The aim of this study was to evaluate and compare transcriptional alterations induced by various steroid receptor agonists in primary cultures of astrocytes and neurons from mouse brain...
April 5, 2017: BMC Neuroscience
https://www.readbyqxmd.com/read/28380519/evidence-that-gene-expression-of-ovarian-follicular-tight-junction-proteins-is-regulated-in-vivo-and-in-vitro-in-cattle
#12
L Zhang, L F Schütz, C L Robinson, M L Totty, L J Spicer
Tight junctions (TJ) are common paracellular sealing structures that control the transport of water, ions, and macromolecules across cell layers. Because the role of TJ in bovine follicular development is unknown, we investigated the developmental and hormonal regulation of the transmembrane TJ protein, occludin (OCLN), and the cytoplasmic TJ proteins, TJ protein 1 (TJP1) and cingulin (CGN) in bovine granulosa cells (GC) and theca cells (TC). For this purpose, bovine GC and TC were isolated from large (>8 mm) and/or small (1 to 5 mm) follicles and either extracted for real-time PCR (qPCR) or cultured in vitro...
March 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28377404/effect-of-androgen-on-kiss1-expression-and-luteinizing-hormone-release-in-female-rats
#13
Kinuyo Iwata, Yuyu Kunimura, Keisuke Matsumoto, Hitoshi Ozawa
Hyperandrogenic women have various grades of ovulatory dysfunction, which lead to infertility. The purpose of this study was to determine whether chronic exposure to androgen affects expression of kisspeptin (ovulation and follicle development regulator) or release of luteinizing hormone (LH) in female rats. Weaned females were subcutaneously implanted with 90-day continuous-release pellets of 5α-dihydrotestosterone (DHT) and studied after 10 weeks of age. Number of Kiss1-expressing cells in both the anteroventral periventricular nucleus (AVPV) and arcuate nucleus (ARC) was significantly decreased in ovary-intact DHT rats...
April 4, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28373106/umbilical-cord-blood-androgen-levels-in-girls-and-boys-assessed-by-gas-chromatography-tandem-mass-spectrometry
#14
Anna-Carin Lundell, Henrik Ryberg, Liesbeth Vandenput, Anna Rudin, Claes Ohlsson, Åsa Tivesten
Androgen exposure of the fetus during gestation plays an important role in human physiology and pathophysiology, but assessment of androgens, in particular dihydrotestosterone (DHT), in human umbilical cord blood is technically challenging. The aim of this study was to assess umbilical cord androgen levels, including DHT, at birth by a highly sensitive assay, and study their association with sex of the infant, sex-hormone-binding globulin (SHBG) levels, and gestational age at delivery. Swedish infants (27 girls, 26 boys) were recruited at maternity care clinics in Southern Sweden...
March 31, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28370068/dose-response-effects-of-sex-hormone-concentrations-on-body-composition-and-adipokines-in-medically-castrated-healthy-men-administered-graded-doses-of-testosterone-gel
#15
Arthi Thirumalai, Katya B Rubinow, Lori A Cooper, John K Amory, Brett T Marck, Alvin M Matsumoto, Stephanie T Page
OBJECTIVE: Serum sex steroid concentrations may alter body composition and glucose homeostasis in men in a dose-response manner. We evaluated these endpoints in healthy men rendered medically castrate through use of a gonadotropin-releasing hormone antagonist (acyline) with incremental doses of exogenous testosterone (T) gel. DESIGN: Subjects (n=6-9 per group) were randomly assigned to injections of acyline every 2 weeks plus transdermal T gel (1.25 g, 2.5 g, 5...
March 30, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28360090/testosterone-prevents-cutaneous-ischemia-and-necrosis-in-males-through-complementary-estrogenic-and-androgenic-actions
#16
Caroline Chenu, Marine Adlanmerini, Frederic Boudou, Elodie Chantalat, Anne-Laure Guihot, Celine Toutain, Isabelle Raymond-Letron, Patricia Vicendo, Alain-Pierre Gadeau, Daniel Henrion, Jean-Francois Arnal, Francoise Lenfant
OBJECTIVE: Chronic nonhealing wounds are a substantial medical concern and are associated with morbidity and mortality; thus, new treatment strategies are required. The first step toward personalized/precision medicine in this field is probably in taking sex differences into account. Impaired wound healing is augmented by ischemia, and we previously demonstrated that 17β-estradiol exerts a major preventive effect against ischemia-induced skin flap necrosis in female mice. However, the equivalent effects of testosterone in male mice have not yet been reported...
March 30, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28356400/phospho-erk-and-sex-steroids-in-the-mpoa-involvement-in-male-mouse-sexual-behavior
#17
Arnaud Jean, Anne-Charlotte Trouillet, Njiva Andry Andrianarivelo, Sakina Mhaouty-Kodja, Helene Hardin-Pouzet
This paper aimed to investigate the mechanisms triggering ERK phosphorylation and its functional role in male sexual behaviour. ERK1/2 phosphorylated form was detected in the medial preoptic area of the hypothalamus (mPOA) during the sexual stimulation of naive and sexually experienced males who were sacrificed 5 minutes after the first intromission. This mating-induced ERK phosphorylation was increased in sexually experienced males compared to naive mice. The functional role of the ERK1/2 pathway activation during sexual behaviour was explored with the administration of a MEK inhibitor, SL-327 (30 mg/kg, i...
March 29, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28346887/high-resolution-mass-spectrometry-as-an-alternative-detection-method-to-tandem-mass-spectrometry-for-the-analysis-of-endogenous-steroids-in-serum
#18
Federico Ponzetto, Julien Boccard, Norbert Baume, Tiia Kuuranne, Serge Rudaz, Martial Saugy, Raul Nicoli
Recently, steroid hormones quantification in blood showed a promising ability to detect testosterone doping and interesting complementarities with the urinary module of the Athlete Biological Passport (ABP). In this work, an ultra-high pressure liquid chromatography-high-resolution mass spectrometry (UHPLC-HRMS) method was developed for the quantification of eleven endogenous steroids in serum. The performance of the full scan and targeted SIM acquisition modes was evaluated and compared to the performance of tandem mass spectrometry (MS/MS)...
March 18, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28345462/functional-interaction-of-fibroblast-growth-factor-8b-and-androgen-in-prostate-cancer-cell-proliferation
#19
Wen-Jun Xiao, Gui-Ming Zhang, Ding-Wei Ye
Fibroblast growth factor 8b and androgen play important roles in cell proliferation of prostate cancer. We investigated the effects of fibroblast growth factor 8b and androgen on the proliferation of prostate cell lines and the corresponding intracellular mechanisms. It is found that dihydrotestosterone and fibroblast growth factor 8b stimulated Lncap cell mitosis in a concentration-responsive manner, with 30 ng/mL as the most suitable concentration, respectively. Dihydrotestosterone treatment alone did not enhance the expression and phosphorylation level of fibroblast growth factor receptor but significantly enhanced the level of fibroblast growth factor receptor phosphorylation elicited by fibroblast growth factor 8b...
March 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28344042/exercise-differentially-affects-metabolic-functions-and-white-adipose-tissue-in-female-letrozole-and-dihydrotestosterone-induced-mouse-models-of-polycystic-ovary-syndrome
#20
Rodrigo R Marcondes, Manuel Maliqueo, Romina Fornes, Anna Benrick, Min Hu, Niklas Ivarsson, Mattias Carlström, Samuel W Cushman, Karin G Stenkula, Gustavo A R Maciel, Elisabet Stener-Victorin
Here we hypothesized that exercise in dihydrotestosterone (DHT) or letrozole (LET)-induced polycystic ovary syndrome mouse models improves impaired insulin and glucose metabolism, adipose tissue morphology, and expression of genes related to adipogenesis, lipid metabolism, Notch pathway and browning in inguinal and mesenteric fat. DHT-exposed mice had increased body weight, increased number of large mesenteric adipocytes. LET-exposed mice displayed increased body weight and fat mass, decreased insulin sensitivity, increased frequency of small adipocytes and increased expression of genes related to lipolysis in mesenteric fat...
March 24, 2017: Molecular and Cellular Endocrinology
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