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https://www.readbyqxmd.com/read/28642789/androgen-receptor-localizes-to-plasma-membrane-by-binding-to-caveolin-1-in-mouse-sertoli-cells
#1
Qiong Deng, Yong Wu, Zeng Zhang, Yue Wang, Minghua Li, Hui Liang, Yaoting Gui
The nonclassical androgen signaling pathway translates signals into alterations in cellular function within minutes, and this action is proposed to be mediated by an androgen receptor (AR) localized to the plasma membrane. This study was designed to determine the mechanism underlying the membrane association of androgen receptor in TM4 cells, a mouse Sertoli cell line. Western blot analysis indicated testosterone-induced AR translocation to the cell membrane. Data from coimmunoprecipitation indicated that AR is associated with caveolin-1, and testosterone enhanced this association...
2017: International Journal of Endocrinology
https://www.readbyqxmd.com/read/28631158/rapid-and-reliable-steroid-hormone-profiling-in-tursiops-truncatus-blubber-using-liquid-chromatography-tandem-mass-spectrometry-lc-ms-ms
#2
Ashley S P Boggs, Tracey B Schock, Lori H Schwacke, Thomas M Galligan, Jeanine S Morey, Wayne E McFee, John R Kucklick
Monitoring of marine mammal steroid hormone status using matrices alternative to blood is desirable due to the ability to remotely collect samples, which minimizes stress to the animal. However, measurement techniques in alternative matrices such as blubber described to date are limited in the number and types of hormones measured. Therefore, a new method using bead homogenization to QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe) extraction, C18 post extraction cleanup and analysis by liquid chromatography tandem mass spectrometry (LC-MS/MS) was developed and applied to the measurement of hormone suites in bottlenose dolphin blubber...
June 19, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28630018/the-modified-ulaanbaatar-procedure-reduced-complications-and-enhanced-cosmetic-outcome-for-the-most-severe-cases-of-hypospadias
#3
V R Jayanthi, C B Ching, D G DaJusta, D J McLeod, S A Alpert
INTRODUCTION/OBJECTIVE: Proximal hypospadias is one of the most challenging conditions that pediatric urologists have to deal with. Many procedures have been devised over the years, but nothing has been proven to be the best option. Although there have been some attempts at correcting severe hypospadias in one procedure, most have advocated a staged approach. The classic approach - laying penile skin or a graft within a split glans followed by glanuloplasty at the second stage - by definition requires two operations on the glans...
May 18, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/28623529/ameliorative-effect-of-omega-3-on-spermatogenesis-testicular-antioxidant-status-and-preimplantation-embryo-development-in-streptozotocin-induced-diabetes-in-rats
#4
Mehdi Khavarimehr, Vahid Nejati, Mazdak Razi, Gholamreza Najafi
PURPOSE: The present study was done to determine the ameliorative effect of polyunsaturated fatty acid omega-3 against experimental diabetes-induced damages on testicular tissue, sperm parameters and preimplantation embryo development in rat model. METHODS: Thirty-two mature male rats were divided into two control and test groups. The experimental diabetes (50 mg kg(-1) streptozotocin, ip) was induced in test group and subdivided into non-treated diabetic, 300 and 600 mg kg(-1) omega-3-treated (orally by gavage) groups...
June 16, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28620296/testosterone-propionate-exacerbates-the-deficits-of-nigrostriatal-dopaminergic-system-and-downregulates-nrf2-expression-in-reserpine-treated-aged-male-rats
#5
Rui Cui, Yunxiao Kang, Li Wang, Shuangcheng Li, Xiaoming Ji, Wensheng Yan, Guoliang Zhang, Huixian Cui, Geming Shi
There is a controversy over the effects of testosterone supplements on dopaminergic function. Both neuroprotective and toxic effects of testosterone supplements are reported. The status of oxidative stress seems to explain the neuroprotective or toxic properties of testosterone. To determine the efficacy of testosterone supplements in different status of oxidative stress, the present studies analyzed the dopamine (DA)-related behaviors and neurochemical indices, as well as markers of nigrostriatal dopaminergic (NSDA) system in reserpine-treated aged male rats followed by testosterone propionate (TP) supplements...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28617846/a-metabolite-of-leucine-%C3%AE-hydroxy-%C3%AE-methylbutyrate-given-to-sows-during-pregnancy-alters-bone-development-of-their-newborn-offspring-by-hormonal-modulation
#6
Tomasz Blicharski, Ewa Tomaszewska, Piotr Dobrowolski, Monika Hułas-Stasiak, Siemowit Muszyński
The effects of dietary β-hydroxy-β-methylbutyrate (HMB) supplementation during gestation on bone, growth plate, and articular cartilage in newborns were determined. Thermal analysis of articular cartilage was performed to examine the structural changes in collagen. At day 70 of gestation, a total of 12 sows (Large White Polish breed, at the second parity) were randomly assigned to two groups, with each group receiving either a basal diet or the same diet supplemented with 0.2 g/day HMB until the 90th day...
2017: PloS One
https://www.readbyqxmd.com/read/28609670/differential-effects-of-the-18-kda-translocator-protein-tspo-ligand-etifoxine-on-steroidogenesis-in-rat-brain-plasma-and-steroidogenic-glands-pharmacodynamic-studies
#7
Philippe Liere, Antoine Pianos, Jean-Paul Oudinet, Michael Schumacher, Yvette Akwa
Etifoxine is indicated in humans for treating anxiety. In rodents, besides its anxiolytic-like properties, it has recently shown neuroprotective and neuroregenerative activities. It acts by enhancing GABAA receptor function and by stimulating acute steroid biosynthesis via the activation of the 18-kDa translocator protein. However, the regulatory action of etifoxine on steroid production is not well characterized. In this work, we performed dose-response, acute and chronic time-course experiments on the effects of intraperitoneal injections of etifoxine on steroid levels in adult male rat brain and plasma analyzed by gas chromatography-mass spectrometry...
June 3, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28607572/gastrodia-elata-blume-rhizome-aqueous-extract-improves-arterial-thrombosis-dyslipidemia-and-insulin-response-in-testosterone-deficient-rats
#8
Min Jung Kim, Hye Jeong Yang, Bo Reum Moon, Ji Eun Kim, Kang Sung Kim, Sunmin Park
Testosterone deficiency deteriorates glucose and lipid metabolism with reducing muscle mass. We investigated whether the consumption of water extracts of Gastrodia elata Blume rhizome (GEB) rich in gastrodin would reduce the symptoms of testosterone deficiency and improve blood flow in orchidectomized (ORX) rats. ORX rats were given high-fat diets supplemented with either 1% cellulose (ORX-control), 0.3% GEB (GEB-L), or 1% GEB (GEB-H) for 8 weeks. Sham-operated rats were fed the same diet as OVX-control rats (normal-control)...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28606866/adverse-health-effects-of-androgen-use
#9
REVIEW
Anna Goldman, Shehzad Basaria
Anabolic androgenic steroids (AAS) are performance enhancing drugs commonly used by athletes and bodybuilders to improve appearance and athletic capability. Unfortunately, these testosterone derivatives can be associated with serious and potentially irreversible side effects, and can impact multiple organ systems. It is important that physicians be familiar with these adverse consequences so that they can appropriately counsel patients whom they suspect of AAS-abuse. In this chapter, we will review the negative effects of these compounds on various organ systems in men using AAS...
June 9, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28584602/gestational-diabetes-mellitus-and-metabolic-disorder-among-the-different-phenotypes-of-polycystic-ovary-syndrome
#10
Mahnaz Ashrafi, Fatemeh Sheikhan, Arezoo Arabipoor, Nicole Rouhana, Roya Hosseini, Zahra Zolfaghari
OBJECTIVES: Polycystic ovary syndrome (PCOS) is a common endocrine disorder related to several metabolic consequences. However, there remains uncertainty regarding the metabolic features of various phenotypes. The aim of this study was to explore the relationship between the prevalence of gestational diabetes mellitus (GDM) and metabolic disorders among the four different phenotypes of PCOS. METHODS: A cross-sectional study was performed in Royan Institute including 208 pregnant women with a history of infertility and PCOS...
May 2017: Oman Medical Journal
https://www.readbyqxmd.com/read/28578329/the-athlete-biological-passport-how-to-personalize-anti-doping-testing-across-an-athlete-s-career
#11
Neil Robinson, Pierre-Edouard Sottas, Yorck Olaf Schumacher
For decades, drug testing has been the main instrument at the disposal of anti-doping authorities. The availability in the 1980s of substances identical to those produced by the human body, including the "big 3" (erythropoietin, testosterone, and growth hormone), necessitated a new paradigm in anti-doping. The athlete biological passport (ABP) is a new paradigm, complementary to traditional drug testing, based on the personalized monitoring of doping biomarkers. Athletes who abuse doping substances do so to trigger physiological changes that provide performance enhancement...
2017: Medicine and Sport Science
https://www.readbyqxmd.com/read/28558078/testosterone-and-voluntary-exercise-alone-or-together-increase-cardiac-activation-of-akt-and-erk1-2-in-diabetic-rats
#12
Leila Chodari, Mustafa Mohammadi, Gisou Mohaddes, Mohammad Reza Alipour, Vajiheh Ghorbanzade, Hassan Dariushnejad, Shima Mohammadi
BACKGROUND: Impaired angiogenesis in cardiac tissue is a major complication of diabetes. Protein kinase B (AKT) and extracellular signal regulated kinase (ERK) signaling pathways play important role during capillary-like network formation in angiogenesis process. OBJECTIVES: To determine the effects of testosterone and voluntary exercise on levels of vascularity, phosphorylated Akt (P- AKT) and phosphorylated ERK (P-ERK) in heart tissue of diabetic and castrated diabetic rats...
December 2016: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/28554727/testosterone-modulates-foxo3a-and-p53-related-genes-to-protect-c2c12-skeletal-muscle-cells-against-apoptosis
#13
Lucía Pronsato, Lorena Milanesi, Andrea Vasconsuelo, Anabela La Colla
The loss of muscle mass and strength with aging, sarcopenia, is a prevalent condition among the elderly, associated with skeletal muscle dysfunction and enhanced muscle cell apoptosis. We have previously demonstrated that testosterone protects against H2O2-induced apoptosis in C2C12 muscle cells, at different levels: morphological, biochemical and molecular. Since we have observed that testosterone reduces p-p53 and maintains the inactive state of FoxO3a transcription factor, induced by H2O2, we analyzed if the hormone was exerting its antiapoptotic effect at transcriptional level, by modulating pro and antiapoptotic genes associated to them...
May 26, 2017: Steroids
https://www.readbyqxmd.com/read/28551483/effect-of-growth-hormone-on-steroid-concentrations-and-mrna-expression-of-their-receptor-and-selected-egg-specific-protein-genes-in-the-chicken-oviduct-during-pause-in-laying-induced-by-fasting
#14
J K Socha, A Sechman, M Mika, A Hrabia
This study was undertaken to examine the effect of growth hormone (GH) treatment during pause in laying on (1) the concentration of steroids in blood plasma and oviduct tissues, (2) the expression of mRNA of steroid receptors, and (3) the mRNA expression of selected egg-specific proteins in the chicken oviduct. A pause in egg laying was induced by food deprivation for 5 d, followed by feeding every other day, and then feeding daily from Day 10 onward. Birds were divided into three groups: control (n = 18) fed ad libitum, subjected to pause in laying (n = 18), and subjected to pause in laying and injected every day with 200 μg/kg BW of chicken GH (chGH; n = 18)...
May 8, 2017: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/28550793/acute-gonadotropin-releasing-hormone-agonist-treatment-enhances-extinction-memory-in-male-rats
#15
L Y Maeng, M B Taha, K K Cover, S S Glynn, M Murillo, K Lebron-Milad, M R Milad
Leuprolide acetate (LEU), also known as Lupron, is commonly used to treat prostate cancer in men. As a gonadotropin-releasing hormone (GnRH) receptor agonist, it initially stimulates the release of gonadal hormones, testosterone (T) and estradiol. This surge eventually suppresses these hormones, preventing the further growth and spread of cancer cells. Individuals receiving this treatment often report anxiety and cognitive changes, but LEU's effects on the neural mechanisms that are involved in anxiety during the trajectory of treatment are not well known...
May 17, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28549305/adsorption-of-steroid-micropollutants-on-polymer-based-spherical-activated-carbon-pbsac
#16
Matteo Tagliavini, Fabio Engel, Peter Georg Weidler, Torsten Scherer, Andrea Iris Schäfer
Removal and interaction mechanisms of four different steroid micropollutants, estrone (E1), estradiol (E2), progesterone (P) and testosterone (T) were determined for different types of polymer-based spherical activated carbon (PBSAC). Higher than 90% removal and significantly faster kinetics compared to conventional granular activated carbon (GAC) were observed, while performance was comparable with powdered activated carbon (PAC). No influence of pH in the range 2-12 was determined, while the presence of humic acid (HA) reduced both the removal and the kinetic by up to 20%...
April 4, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28538307/can-cold-water-immersion-enhance-recovery-in-elite-olympic-weightlifters-an-individualized-perspective
#17
Jan Schimpchen, Maximilian Wagner, Alexander Ferrauti, Michael Kellmann, Mark Pfeiffer, Tim Meyer
We investigated whether cold water immersion (CWI) after intensive training sessions can enhance recovery in elite Olympic weightlifters, taking into account each athlete's individual response pattern. The entire German male Olympic weightlifting national team participated in the study (n = 7), ensuring collection of data from elite athletes only. Using a randomized cross-over design, the athletes went through 2 high-intensity training microcycles consisting of 5 training sessions that were either followed by a CWI or passive recovery...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28516454/a-multiscale-computational-modelling-approach-predicts-mechanisms-of-female-sex-risk-in-the-setting-of-arousal-induced-arrhythmias
#18
Pei-Chi Yang, Laura L Perissinotti, Fernando López-Redondo, Yibo Wang, Kevin R DeMarco, Mao-Tsuen Jeng, Igor Vorobyov, Robert D Harvey, Junko Kurokawa, Sergei Y Noskov, Colleen E Clancy
Female sex is a risk factor for inherited and acquired Long-QT associated Torsade de Pointes (TdP) arrhythmias, and sympathetic discharge is a major factor in triggering TdP in female Long-QT syndrome patients. We used a combined experimental and computational approach to predict 'the perfect storm' of hormone concentration, IKr block, and sympathetic stimulation that induces arrhythmia in females with inherited and acquired Long-QT. More specifically, we developed mathematical models of acquired and inherited Long-QT syndrome in male and female ventricular human myocytes by combining effects of a hormone and a hERG blocker dofetilide or hERG mutations...
May 18, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28501551/contribution-of-stress-and-sex-hormones-to-memory-encoding
#19
Christian J Merz
Distinct stages of the menstrual cycle and the intake of oral contraceptives (OC) affect sex hormone levels, stress responses, and memory processes critically involved in the pathogenesis of mental disorders. To characterize the interaction of sex and stress hormones on memory encoding, 30 men, 30 women in the early follicular phase of the menstrual cycle (FO), 30 women in the luteal phase (LU), and 30 OC women were exposed to either a stress (socially evaluated cold-pressor test) or a control condition prior to memory encoding and immediate recall of neutral, positive, and negative words...
May 6, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28480685/hormonal-responses-to-a-rugby-match-a-brief-review
#20
Maamer Slimani, Foued Cheour, Wassim Moalla, Julien S Baker
BACKGROUND: Rugby is an intermittent team sport, commonly stressing the endocrine system by physiological efforts. However, no review has synthesized the available literature on the hormonal responses to a rugby match. The purpose of this review was to examine the hormonal responses to a rugby match. Mediator and moderator variables for the rugby match- hormonal responses relationship were also discussed. METHODS: The systematic search was conducted using different databases and according to the Population/Intervention or Exposure/Comparison/Outcome(s) [PICO] criteria...
May 5, 2017: Journal of Sports Medicine and Physical Fitness
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