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Steroid profiling

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https://www.readbyqxmd.com/read/29148228/evaluation-of-markers-out-of-the-steroid-profile-for-the-screening-of-testosterone-misuse-part-i-transdermal-administration
#1
Aristotelis Kotronoulas, Àlex Gomez-Gómez, Andreu Fabregat, Jordi Segura, Sheng Yang, Yanyi Xing, Wu Moutian, Josep Marcos, Jesús Joglar, Rosa Ventura, Oscar J Pozo
Although the introduction by WADA of the steroid module of the athlete biological passport (ABP) marked an important step forward in the screening of testosterone (T) misuse, it still remains one of the most difficult challenges in doping control analysis. The urinary determination of alternative markers has been recently reported as a promising tool for improving the screening of T oral administration. However, their evaluation for other, commonly used, administration routes is still required. The main goal of this study is the evaluation of the potential of two groups of metabolites (cysteinyl conjugated and glucuronoconjugated) after transdermal and intramuscular administration of T...
November 17, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/29147745/steroid-hormone-profiling-in-human-breast-adipose-tissue-using-semi-automated-purification-and-highly-sensitive-determination-of-estrogens-by-gc-apci-ms-ms
#2
Kristin Hennig, Jean Philippe Antignac, Emmanuelle Bichon, Marie-Line Morvan, Isabelle Miran, Suzette Delaloge, Jean Feunteun, Bruno Le Bizec
Body mass index is a known breast cancer risk factor due to, among other mechanisms, adipose-derived hormones. We developed a method for steroid hormone profiling in adipose tissue to evaluate healthy tissue around the tumor and define new biomarkers for cancer development. A semi-automated sample preparation method based on gel permeation chromatography and subsequent derivatization with trimethylsilyl (TMS) is presented. Progestagens and androgens were determined by GC-EI-MS/MS (LOQ 0.5 to 10 ng/g lipids)...
November 16, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29116433/safety-of-everolimus-plus-exemestane-in-patients-with-hormone-receptor-positive-her2-negative-locally-advanced-or-metastatic-breast-cancer-results-of-phase-iiib-ballet-trial-in-spain
#3
E Ciruelos, M Vidal, E Martínez de Dueñas, N Martínez-Jáñez, Y Fernández, J A García-Sáenz, L Murillo, F Carabantes, A Beliera, R Fonseca, J Gavilá
BACKGROUND: Everolimus with exemestane has shown promising activity in patients with hormone-receptor (HR)-positive HER2-negative endocrine-resistant advanced breast cancer. It is necessary, therefore, to characterize the safety profile of this new combination in the real-world clinical setting and in the broadest possible population. PATIENTS AND METHODS: Post-menopausal women with HR-positive HER2-negative advanced breast cancer progressing after prior non-steroidal aromatase inhibitors (NSAIs) were included...
November 7, 2017: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/29115663/endogenous-annexin-a1-anxa1-modulates-early-phase-gestation-and-offspring-sex-ratio-skewing
#4
Cristina Bichels Hebeda, Isabel Daufenback Machado, Isadora Reif-Silva, Jusciele Brogin Moreli, Sonia Maria Oliani, Suchita Nadkarni, Mauro Perretti, Estela Bevilacqua, Sandra H P Farsky
Annexin A1 (AnxA1) is a glucocorticoid-regulated anti-inflammatory protein secreted by phagocytes and other specialised cells. In the endocrine system, AnxA1 controls secretion of steroid hormones and it is abundantly expressed in the testis, ovaries, placenta and seminal fluid, yet its potential modulation of fertility has not been described. Here we observed that AnxA1 knockout (KO) mice delivered a higher number of pups, with a higher percentage of female offsprings. This profile was not dependent on the male features, as sperm from KO male mice did not present functional alterations, and had an equal proportion of Y and X chromosomes, comparable to wild type (WT) male mice...
November 8, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29114192/optic-neuritis-observation-and-experience-at-a-tertiary-care-hospital-in-qassim-region-saudi-arabia
#5
Mohammad Jawad Alamgir, Syed Abrar Ali, Nermin Aly Hamdy, Moin Zafar Khan, Elgamri E Mohammad
Objectives: Optic neuritis (ON) can occur in isolation or association with multiple sclerosis (MS) or neuromyelitis optica. ON, is seen more commonly in Caucasians and interaction is found to exist between ethnic origin and the latitude at which the patient grows up. At present limited information is available about the profile of ON in Saudi patients. We aimed to analyze the records of ON patients, in regard to their presentation, natural history, treatment outcome, and risk and association with MS...
November 2017: International Journal of Health Sciences
https://www.readbyqxmd.com/read/29113754/nuclear-receptor-hr3-controls-locust-molt-by-regulating-chitin-synthesis-and-degradation-genes-of-locusta-migratoria
#6
Xiaoming Zhao, Zhongyu Qin, Weimin Liu, Xiaojian Liu, Bernard Moussian, Enbo Ma, Sheng Li, Jianzhen Zhang
During growth and development of insects, the steroid hormone 20-Hydroxyecdysone (20E) regulates the molting process through activation of a series of genes including E74, E75 and HR3 by the 20E receptor EcR. Here, we analyzed the function of LmHR3 in the migratory locust Locusta migratoria. By sequence comparison, we first identified and characterized the putative nuclear receptor protein (LmHR3) based on L. migratoria transcriptome data. The full length cDNA is 2272 bp long encoding a protein of 455 amino acids that contains a DNA binding domain (zinc finger) and a ligand binding domain...
November 4, 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29112564/a-surgical-clostridium-associated-risk-of-death-score-predicts-mortality-after-colectomy-for-clostridium-difficile
#7
Audrey S Kulaylat, Zain Kassam, Christopher S Hollenbeak, David B Stewart
BACKGROUND: A Clostridium difficile-associated risk of death score was recently developed and validated by using a national cohort of both nonsurgical and surgical patients admitted with C difficile infection. However, risk scores specifically derived from surgical cohorts and designed for patients with C difficile infection are currently unavailable. OBJECTIVE: The aim of this study was to develop a risk of death score for patients with C difficile infection who are being considered for total abdominal colectomy because of the failure of medical therapy...
December 2017: Diseases of the Colon and Rectum
https://www.readbyqxmd.com/read/29108778/the-timing-and-duration-of-estradiol-treatment-in-a-rat-model-of-the-perimenopause-influences-on-social-behavior-and-the-neuromolecular-phenotype
#8
Alexandra N Garcia, Christina Depena, Kelsey Bezner, Weiling Yin, Andrea C Gore
This study tested the effects of timing and duration of estradiol (E2) treatment, factors that are clinically relevant to hormone replacement in perimenopausal women, on social behavior and expression of genes in brain regions that regulate these behaviors. Female rats were ovariectomized (OVX) at 1year of age, roughly equivalent to middle-age in women, and given E2 or vehicle for different durations (3 or 6months) and timing (immediately or after a 3-month delay) relative to OVX. Social and ultrasonic vocalization (USV) behaviors were assessed at the 3 and 6month timepoints, and the rats' brains were then used for gene expression profiling in hypothalamus (supraoptic nucleus, paraventricular nucleus), bed nucleus of the stria terminalis, medial amygdala, and prefrontal cortex using a 48-gene qPCR platform...
November 8, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29107601/expression-of-sf1-and-dax-1-are-regulated-by-thyroid-hormones-and-androgens-during-silurana-tropicalis-early-development
#9
Diana E K Campbell, Valerie S Langlois
Thyroid hormones (THs) and androgens have been shown to be extensively involved in sexual development; however, relatively little is known with regard to TH-related and androgenic actions in sex determination. We first established expression profiles of three sex-determining genes (sf1, dax-1, and sox9) during the embryonic development of Western clawed frogs (Silurana tropicalis). Transcripts of sf1 and sox9 were detected in embryos before the period in which embryonic transcription commences indicating maternal transfer, whereas dax-1 transcripts were not detected until later in development...
October 28, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29107213/current-and-future-treatment-options-for-pemphigus-is-it-time-to-move-towards-more-effective-treatments
#10
REVIEW
Soheil Tavakolpour
Systemic administration of corticosteroid (CS) remains the standard gold treatment for pemphigus. However, because of several long-term adverse effects, steroid-sparing agents are usually prescribed in combination with CSs. Despite the high number of available studies, the choice of best drugs to treat pemphigus remains controversial. Therapeutic approaches for pemphigus can be divided into traditional treatment and emerging ones. Personalized medicine, which aims to increase the efficacy as well as reduce adverse effects of treatments, could be considered as the future option...
December 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29106544/effects-of-adult-female-rat-androgenization-on-brain-morphology-and-metabolomic-profile
#11
Carmen Perez-Laso, Sebastián Cerdan, Carme Junque, Ángel Gómez, Esperanza Ortega, Mireia Mora, Carlos Avendaño, Esther Gómez-Gil, María Cruz Rodríguez Del Cerro, Antonio Guillamon
Androgenization in adult natal women, as in transsexual men (TM), affects brain cortical thickness and the volume of subcortical structures. In order to understand the mechanism underlying these changes we have developed an adult female rat model of androgenization. Magnetic resonance imaging and spectroscopy were used to monitor brain volume changes, white matter microstructure and ex vivo metabolic profiles over 32 days in androgenized and control subjects. Supraphysiological doses of testosterone prevents aging decrease of fractional anisotropy values, decreased general cortical volume and the relative concentrations of glutamine (Gln) and myo-Inositol (mI)...
July 6, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/29105068/activation-of-plasmacytoid-dendritic-cells-by-apoptotic-particles-mechanism-for-the-loss-of-immunologic-tolerance-in-sj%C3%A3-gren-s-syndrome
#12
Mari Ainola, Pauliina Porola, Yuya Takakubo, Beata Przybyla, Vesa-Petteri Kouri, Tuomas Aleksi Tolvanen, Arno Hänninen, Dan Christian Nordström
Sjögren's syndrome (SS) is a common autoimmune disease targeting salivary and lacrimal glands. It is strongly female-dominant characterized by low estrogen levels combined with a local intracrine dihydrotestosterone defect. We hypothesized that these hormonal deficits lead to increased apoptosis of the epithelial cells and plasmacytoid dendritic cell (pDC) mediated pro-inflammatory host responses. Expression of Toll-like receptors (TLRs) 7 and 9 and cytokine profile was studied in pDCs treated with apoptotic particles collected in consecutive centrifugation steps of media from apoptotic cells...
November 4, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/29095075/suitable-reference-gene-selection-for-gene-expression-studies-in-knee-osteoarthritis-synovium-using-quantitative-pcr-analysis
#13
Hiroshi Watanabe, Hirotaka Ishii, Kenji Takahashi, Shinro Takai, Hitoshi Ozawa
Osteoarthritis (OA) is the leading cause of musculoskeletal disability in the elderly. Insights into the biological features of OA are obtained by characterization of the molecular features by gene expression profiling using reverse transcription-quantitative PCR (RT-qPCR). However, it has recently become evident that the use of suitable reference genes is required for appropriate normalization of this technique. Here total RNA was isolated from the synovium of 18 men and 20 women who underwent total knee arthroplasty for knee OA (KOA)...
November 2, 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/29094514/athenolide-a-a-new-steroidal-lactone-from-the-leaves-of-athenaea-martiana-solanacea-determined-by-means-of-hplc-hrms-spe-nmr-analysis
#14
Eder L Silva, Rita C Almeida-Lafetá, Ricardo M Borges, Dan Staerk
Athenaea (Solanaceae) is an endemic genus belonging to the Brazilian Atlantic Rainforest. Recently, botanical investigations suggested the re-evaluation of the generic status of the genus Athenaea as a synonym of Aureliana. In this study, the first investigation of the Athenaea genus performed on Athenaea martiana by means of HPLC-HRMS-SPE-NMR combined with high-resolution radical scavenging profile led to identification of several phenolic acids as radical scavengers: protocatechuic acid (1), 4-hydroxybenzoic acid (2), caffeic acid (3), vanillic acid (4) and ferulic acid (6)...
November 1, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29094388/peptide-gam-immunoadsorption-therapy-in-primary-membranous-nephropathy-prism-phase-ii-trial-investigating-the-safety-and-feasibility-of-peptide-gam-immunoadsorption-in-anti-pla2-r-positive-primary-membranous-nephropathy
#15
Patrick Hamilton, Durga Kanigicherla, Prasanna Hanumapura, Lars Walz, Dieter Kramer, Moritz Fischer, Paul Brenchley, Sandip Mitra
INTRODUCTION: Membranous nephropathy (MN) is among the most common causes of nephrotic syndrome in adults worldwide. Most patients have primary MN (PMN), an autoimmune condition associated with the IgG anti-PLA2 R autoantibody. For patients with severe disease, standard of care continues to be a 6-month regime of rotating high dose steroids and immunosuppression that comes with a significant side-effect profile. Immunoadsorption is a relatively safe procedure for the extracorporeal removal of specific immunoglobulins without the need for medications...
November 2, 2017: Journal of Clinical Apheresis
https://www.readbyqxmd.com/read/29092853/prophylactic-effect-of-trimethoprim-sulfamethoxazole-for-pneumocystis-pneumonia-in-patients-with-rheumatic-diseases-exposed-to-prolonged-high-dose-glucocorticoids
#16
Jun Won Park, Jeffrey R Curtis, Jinyoung Moon, Yeong Wook Song, Suhnggwon Kim, Eun Bong Lee
OBJECTIVES: To investigate the efficacy and safety of trimethoprim/sulfamethoxazole (TMP-SMX) as primary prophylaxis for pneumocystis pneumonia (PCP) in patients with rheumatic diseases receiving high-dose steroids. METHODS: The study included 1522 treatment episodes with prolonged (≥4 weeks) high-dose (≥30 mg/day prednisone) steroids in 1092 patients over a 12-year period. Of these, 262 treatment episodes involved TMP-SMX (prophylaxis group) while other episodes involved no prophylaxis (control group)...
November 1, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/29092787/estradiol-metabolites-as-biomarkers-of-endometrial-cancer-prognosis-after-surgery
#17
Yannick Audet-Delage, Jean Grégoire, Patrick Caron, Véronique Turcotte, Marie Plante, Pierre Ayotte, David Simonyan, Lyne Villeneuve, Chantal Guillemette
Endometrial cancer (EC) is the most common gynecologic malignancy prevailing after menopause. Defining steroid profiles may help predict the risk of recurrence after hysterectomy, which remains limited due to the lack of reliable markers. Adrenal precursors, androgens, parent estrogens and catechol estrogen metabolites were measured by mass spectrometry (MS) in preoperative serums and those collected one month after hysterectomy from 246 newly diagnosed postmenopausal EC cases. We also examined the associations between steroid hormones and EC status by including 110 healthy postmenopausal women...
October 29, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29089925/advances-in-understanding-of-structural-reorganization-in-the-hypothalamic-neurosecretory-system
#18
REVIEW
Seiji Miyata
The hypothalamic neurosecretory system synthesizes neuropeptides in hypothalamic nuclei and releases them from axonal terminals into the circulation in the neurohypophysis (NH) and median eminence (ME). This system plays a crucial role in regulating body fluid homeostasis and social behaviors as well as reproduction, growth, metabolism, and stress responses, and activity-dependent structural reorganization has been reported. Current knowledge on dynamic structural reorganization in the NH and ME, in which the axonal terminals of neurosecretory neurons directly contact the basement membrane (BM) of a fenestrated vasculature, is discussed herein...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29083134/clinical-endocrinology-and-hormones-quantitation-the-increasing-role-of-mass-spectrometry
#19
Federica D'Aurizio, Marco Cantù
Clinical endocrinology has always had a close relationship with laboratory medicine. In fact, the quantification of hormones is of great importance for diagnosis, treatment, recurrence and patient's prognosis of endocrine disorders. This review dealt with the role of the laboratory in diagnosing endocrine pathologies related to adrenal gland, pituitary, gonads and thyroid. The measurements of the main hormones (17- hydroxyprogesterone, androstenedione, dehydroepiandrosterone sulphate, testosterone, estradiol, cortisol, aldosterone, metanephrines, thyroglobulin and insulin-like-growth factor-1) were described considering analytical characteristics but also some aspects of pre-analytical and post- analytical steps...
October 27, 2017: Minerva Endocrinologica
https://www.readbyqxmd.com/read/29078043/doping-control-analysis-at-the-rio-2016-olympic-and-paralympic-games
#20
Henrique Marcelo Gualberto Pereira, Vinicius Figueiredo Sardela, Monica Costa Padilha, Luciana Mirotti, Alessandro Casilli, Fabio Azamor de Oliveira, Gustavo de Albuquerque Cavalcanti, Lucas Martins Lisandro Rodrigues, Amanda Lessa Dutra de Araujo, Rachel Santos Levy, Pedro Antonio Castelo Teixeira, Felipe Alves Gomes de Oliveira, Ana Carolina Giordani Duarte, Ana Carolina Dudenhoeffer Carneiro, Joseph Albert Medeiros Evaristo, Gustavo Ramalho Cardoso Dos Santos, Giovanni Carlo Verissimo da Costa, Fernando de Lima Castro, Fabio Cesar Sousa Nogueira, Fernanda Bertão Scalco, Luciana Pizzatti, Francisco Radler de Aquino Neto
This paper summarizes the results obtained from the doping control analyses performed during the Summer XXXI Olympic Games (from 03 to 21 August 2016) and XV Paralympic Games (from 07 to 18 September 2016). The analyses of all doping control samples were performed at the Brazilian Doping Control Laboratory (LBCD), a World Anti-Doping Agency (WADA)-accredited laboratory located in Rio de Janeiro, Brazil. A new facility at Rio de Janeiro Federal University (UFRJ) was built and fully operated by over seven hundred professionals, including Brazilian and international scientists, administrative staff and volunteers...
October 27, 2017: Drug Testing and Analysis
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