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https://www.readbyqxmd.com/read/28549305/adsorption-of-steroid-micropollutants-on-polymer-based-spherical-activated-carbon-pbsac
#1
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/28546815/role-of-statin-drugs-for-polycystic-ovary-syndrome
#2
REVIEW
Lisa Cassidy-Vu, Edwina Joe, Julienne K Kirk
Objective: To review the potential role and specific impact of statin drugs in women with PCOS. The evidence for this use of statins in PCOS is limited and still under further investigation. Materials and methods: A search was conducted using PubMed, DynaMed and PubMedHealth databases through October 16, 2016 using the terms polycystic ovary syndrome, PCOS, hydroxymethylglutaryl-CoA reductase inhibitors, hydroxymethylglutaryl-CoA, statin, atorvastatin, fluvastatin, lovastatin, pitavastatin, pravastatin, rosuvastatin and simvastatin...
December 2016: Journal of Family & Reproductive Health
https://www.readbyqxmd.com/read/28546543/metabolic-profiling-of-polycystic-ovary-syndrome-reveals-interactions-with-abdominal-obesity
#3
Alexessander Couto Alves, Beatriz Valcarcel, Ville-Petteri Mäkinen, Laure Morin-Papunen, Sylvain Sebert, Antti J Kangas, Pasi Soininen, Shikta Das, Maria De Iorio, Lachlan Coin, Mika Ala-Korpela, Marjo-Riitta Järvelin, Stephen Franks
BACKGROUND: Polycystic ovary syndrome (PCOS) is a common reproductive disorder associated with metabolic disturbances including obesity, insulin resistance, and diabetes mellitus. Here we investigate whether changes in the metabolic profile of PCOS women are driven by increased tendency to obesity or are specific features of PCOS related to increased testosterone levels. DESIGN AND METHODS: We conducted an NMR metabolomics association study of PCOS cases (n=145) and controls (n=687) nested in a population-based birth cohort (n=3,127)...
May 26, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28544938/sex-steroids-and-metabolic-responses-in-mussels-mytilus-galloprovincialis-exposed-to-drospirenone
#4
Tiziana Cappello, Denise Fernandes, Maria Maisano, Andrea Casano, Marta Bonastre, Maria João Bebianno, Angela Mauceri, Salvatore Fasulo, Cinta Porte
Drospirenone (DRO) is a synthetic progestin derived from 17α-spironolactone with a pharmacological mechanism of action similar to progesterone. Despite its wide use as pharmaceutical and consequent continuous release into the aquatic environment, DRO effects have been poorly investigated on aquatic biota. In order to unravel the toxicity mechanisms of DRO, mussels Mytilus galloprovincialis were exposed for 7 days to different concentrations of DRO, namely 20ng/L (Low; L), 200ng/L (Medium; M), 2000ng/L (High; H) and 10μg/L (Super High; SH) nominal doses...
May 22, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28532840/effect-of-breed-plane-of-nutrition-and-age-on-growth-scrotal-development-metabolite-concentrations-and-on-systemic-gonadotropin-and-testosterone-concentrations-following-a-gnrh-challenge-in-young-dairy-bulls
#5
C J Byrne, S Fair, A M English, C Urh, H Sauerwein, M A Crowe, P Lonergan, D A Kenny
The onset of puberty in the bull is regulated by the timing of early GnRH pulsatility release from the hypothalamus, which has been demonstrated to be affected by plane of nutrition during calf-hood. The aim of this study was to determine the effect of plane of nutrition on growth rate, scrotal development, metabolite concentrations and exogenous gonadotrophin (GnRH) induced release of luteinizing hormone (LH), follicle stimulating hormone (FSH) and testosterone (TT) in pre-pubertal bulls of two contrasting dairy breeds...
July 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28532684/quantitative-determination-of-testosterone-levels-with-biolayer-interferometry
#6
Hao Zhang, Wei Li, Hong Luo, Guangming Xiong, Yuanhua Yu
Natural and synthetic steroid hormones are widely spread in the environment and are considered as pollutants due to their endocrine activities, even at low concentrations, which are harmful to human health. To detect steroid hormones in the environment, a novel biosensor system was developed based on the principle of biolayer interferometry. Detection is based on changes in the interference pattern of white light reflected from the surface of an optical fiber with bound biomolecules. Monitoring interactions between molecules does not require radioactive, enzymatic, or fluorescent labels...
May 19, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28531375/mouse-minipuberty-coincides-with-gonocyte-transformation-into-spermatogonial-stem-cells-a-model-for-human-minipuberty
#7
Ruili Li, Amanda Vannitamby, Sarah S K Yue, David Handelsman, John Hutson
As the transient postnatal hormone surge in humans, known as 'minipuberty', occurs simultaneously with key steps in germ-cell development, we investigated whether similar changes occur in the hypothalamic-pituitary-testicular axis of neonatal mice at a time that would coincide with gonocyte transformation into spermatogonial stem cells (SSC). Serum and testes were collected from C57Bl/6 mice at embryonic Day 17 (E17), birth (postnatal Day 0; P0) and daily until P10. Serum FSH and testosterone levels in both serum and testes were analysed and gene expression of FSH receptor (Fshr), luteinising hormone receptor (Lhr), anti-Müllerian hormone (Amh), octamer-binding transcription factor 4 (Oct-4), membrane type 1 metalloprotease (Mt1-mmp), proto-oncogene C-kit and promyelocytic leukaemia zinc finger (Plzf ) was quantified by real-time polymerase chain reaction...
May 23, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/28508601/effects-of-anorexia-nervosa-on-the-endocrine-system
#8
Charumathi Baskaran, Madhusmita Misra, Anne Klibanski
Anorexia nervosa (AN) is characterized by severe undernutrition associated with alterations in multiple endocrine axes, which are primarily adaptive to the state of caloric deprivation. Hormonal changes include growth hormone (GH) resistance with low insulin like growth factor-1 (IGF-1) levels, hypothalamic hypogonadism, relative hypercortisolemia and changes in appetite regulating hormones, including leptin, ghrelin, and peptide YY. These alterations contribute to abnormalities in bone metabolism leading to low bone mass, impaired bone microarchitecture, and increased risk for fracture, and may also negatively impact cognition, emotions and mood...
March 2017: Pediatric Endocrinology Reviews: PER
https://www.readbyqxmd.com/read/28506817/in-vitro-cyp-mediated-drug-metabolism-in-the-zebrafish-embryo-using-human-reference-compounds
#9
Moayad Saad, An Matheeussen, Sebastiaan Bijttebier, Evy Verbueken, Casper Pype, Christophe Casteleyn, Chris Van Ginneken, Sandra Apers, Louis Maes, Paul Cos, Steven Van Cruchten
The increasing use of zebrafish embryos as an alternative model for toxicological and pharmacological studies necessitates a better understanding of xenobiotic biotransformation in this species. As cytochrome P450 enzymes (CYPs) play an essential role in this process, in vitro drug metabolism of four human CYP-specific substrates, i.e. dextromethorphan (DXM), diclofenac (DIC), testosterone (TST) and midazolam (MDZ) was investigated in adult male and female zebrafish, and in zebrafish embryos and larvae up to 120hours post-fertilization...
May 12, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28505640/in-older-men-with-low-testosterone-levels-and-age-associated-memory-impairment-testosterone-did-not-improve-memory
#10
Calvin Hirsch
No abstract text is available yet for this article.
May 16, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/28498873/associations-of-androgens-with-depressive-symptoms-and-cognitive-status-in-the-general-population
#11
Hanna Kische, Stefan Gross, Henri Wallaschofski, Hans Jörgen Grabe, Henry Völzke, Matthias Nauck, Robin Haring
OBJECTIVES: Associations between androgens and depressive symptoms were mostly reported from cross-sectional and patient-based studies. STUDY DESIGN/MAIN OUTCOME MEASURES: Longitudinal data from 4,110 participants of the Study of Health in Pomerania were used to assess sex-specific associations of baseline total and free testosterone, androstenedione and sex hormone-binding globulin with incident depressive symptoms and cognitive status at 5- and 10-year follow-up...
2017: PloS One
https://www.readbyqxmd.com/read/28495834/testosterone-therapy-for-menopausal-women
#12
(no author information available yet)
It has been suggested that there is a link between low circulating concentrations of testosterone and reduced sexual functioning in postmenopausal women,(1) and it has been more than 60 years since the effects of testosterone therapy for the management of menopausal symptoms were first reported.(2) Since then, testosterone supplementation has received growing attention for its potential role in maintaining sexual function in menopausal women. The National Institute for Health and Care Excellence guideline on the diagnosis and management of menopause recommends considering testosterone supplementation for women with low sexual desire if hormone replacement therapy (HRT) alone has been ineffective...
May 2017: Drug and Therapeutics Bulletin
https://www.readbyqxmd.com/read/28495270/egg-deposition-of-maternal-testosterone-is-primarily-controlled-by-the-preovulatory-peak-of-luteinizing-hormone-in-japanese-quail
#13
Monika Okuliarova, Simone L Meddle, Michal Zeman
Differential transfer of maternal testosterone (T) into egg yolk provides a means of adjusting an offspring's phenotype to ambient environmental conditions. While the environmental and genetic driven variability in yolk T levels is widely described, the underlying mechanisms are poorly understood. Here, we investigated whether neuroendocrine mechanisms controlling ovulatory processes are associated with the regulation of yolk T deposition. Circulatory profiles of luteinizing hormone (LH), T and estradiol levels were analysed during the last 7 h before ovulation in Japanese quail selected for contrasting yolk T concentrations...
May 8, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28494009/postnatal-changes-and-sexual-dimorphism-in-collagen-expression-in-mouse-skin
#14
Koji Y Arai, Takuya Hara, Toyofumi Nagatsuka, Chikako Kudo, Sho Tsuchiya, Yoshihiro Nomura, Toshio Nishiyama
To investigate sexual dimorphism and postnatal changes in skin collagen expression, mRNA levels of collagens and their regulatory factors in male and female skin were examined during the first 120 days of age by quantitative realtime PCR. Levels of mRNAs encoding extracellular matrices did not show any differences between male and female mice until day 15. Col1a1 and Col1a2 mRNAs noticeably increased at day 30 and remained at high levels until day 120 in male mice, while those in female mice remained at low levels during the period...
2017: PloS One
https://www.readbyqxmd.com/read/28493277/bone-mineral-density-in-complete-androgen-insensitivity-syndrome-and-the-timing-of-gonadectomy
#15
Thomas F J King, Winnie Z M Wat, Sarah M Creighton, Gerard S Conway
OBJECTIVE: Low bone mineral density (BMD) has been reported in complete androgen insensitivity syndrome (CAIS), but the impact of timing of gonadectomy is not known. We aimed to assess the relationship between age of gonadectomy and BMD in women with CAIS. DESIGN: Retrospective analysis of pre- and post-gonadectomy parameters in women with CAIS attending an adult Disorders of Sex Development (DSD) clinic in a tertiary centre. PATIENTS: One hundred and thirteen women with CAIS...
May 10, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28487389/normalization-of-testosterone-levels-after-testosterone-replacement-therapy-is-associated-with-decreased-incidence-of-atrial-fibrillation
#16
Rishi Sharma, Olurinde A Oni, Kamal Gupta, Mukut Sharma, Ram Sharma, Vikas Singh, Deepak Parashara, Surineni Kamalakar, Buddhadeb Dawn, Guoqing Chen, John A Ambrose, Rajat S Barua
BACKGROUND: Atrial fibrillation (AF) is the most common cardiac dysrhythmia associated with significant morbidity and mortality. Several small studies have reported that low serum total testosterone (TT) levels were associated with a higher incidence of AF. In contrast, it is also reported that anabolic steroid use is associated with an increase in the risk of AF. To date, no study has explored the effect of testosterone normalization on new incidence of AF after testosterone replacement therapy (TRT) in patients with low testosterone...
May 9, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28485925/occurrence-and-ecotoxicological-effects-of-free-conjugated-and-halogenated-steroids-of-17%C3%AE-hydroxypregnanolone-and-pregnanediol-in-swiss-wastewater-and-surface-water
#17
Kun Zhang, Yanbin Zhao, Karl Fent
Apart from estrogens, the occurrence and ecotoxicity of steroids in the aquatic environment is poorly known. Here we analyzed 33 steroids, including estrogens, androgens, progestins, and glucocorticoids in hospital wastewaters, river water and in municipal wastewater treatment plant (WTP) influents and effluents at different sites in Switzerland. In addition, wastewater from different treatment steps of two WTPs with advanced treatment, such as ozonation or pulverized activated carbon, were analyzed to study the steroid's behavior during treatment...
May 9, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28485778/toxic-effects-of-ketamine-on-reproductive-system-via-disrupting-hypothalamic-pituitary-testicular-axis
#18
L Qi, J-Y Liu, Y-L Zhu, W Liu, S-D Zhang, W-B Liu, J-J Jiang
OBJECTIVE: In this paper, we focused on the toxic effect of ketamine on the reproductive system in male rats and its underlying mechanisms. MATERIALS AND METHODS: Rats were randomly allocated into four groups (n=10), i.e. a control group and 3 ketamine groups (high-dose, mid-dose, low-dose). Animals in the ketamine groups received an intraperitoneal injection of ketamine (20, 40 or 60 mg/kg) every 3 days for 7 times. Control rats were injected with normal saline instead...
April 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28482050/parallel-assessment-of-the-effects-of-bisphenol-a-and-several-of-its-analogs-on-the-adult-human-testis
#19
C Desdoits-Lethimonier, L Lesné, P Gaudriault, D Zalko, J P Antignac, Y Deceuninck, C Platel, N Dejucq-Rainsford, S Mazaud-Guittot, B Jégou
STUDY QUESTION: Are bisphenol A (BPA) and BPA analogs (BPA-A) safe for male human reproductive function? SUMMARY ANSWER: The endocrine function of human testes explants [assessed by measuring testosterone and insulin-like factor 3 (INSL3)] was impacted by exposure of the human adult testis explants to BPA/BPA-A. WHAT IS KNOWN ALREADY: The few epidemiologic studies performed suggest that bisphenols have potential endocrine disruptive properties, but they did not identify clear and direct patterns of endocrine disruption...
May 8, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28480754/low-dose-spironolactone-ameliorates-insulin-resistance-and-suppresses-elevated-plasminogen-activator-inhibitor-1-during-gestational-testosterone-exposure
#20
Lawrence A Olatunji, Taofeek O Usman, Aminat I Akinade, Oluwaseun A Adeyanju, InKyeom Kim, Ayodele O Soladoye
CONTEXT: Elevated gestational circulating testosterone has been associated with pathological pregnancies that increase the risk of development of cardiometabolic disorder in later life. OBJECTIVE: We hypothesised that gestational testosterone exposure, in late pregnancy, causes glucose deregulation and atherogenic dyslipidaemia that would be accompanied by high plasminogen activator inhibitor-1 (PAI-1). The study also hypothesise that low-dose spironolactone treatment would ameliorate these effects...
May 8, 2017: Archives of Physiology and Biochemistry
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