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Steroid profiling

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https://www.readbyqxmd.com/read/28941409/a-comparison-of-steroid-profiles-in-the-testis-and-seminal-vesicle-of-the-catfish-heteropneustes-fossilis
#1
Radha Chaube, Surabhi Mishra, Rahul Kumar Singh
In the present study, distribution of steroid hormones (estradiol-17β (E2), testosterone (T), corticosteroids and progestins) in the testis and seminal vesicles (SV) of the catfish Heteropneustes fossilis were investigated in two seasons (pre-spawning and spawning phases) of the reproductive cycle. The data showed that the levels of the steroid hormones varied significantly in both reproductive phases and exhibited organ-related differences. Sex steroid levels were highest in the pre-spawning phase and lowest in the spawning phase...
September 9, 2017: Theriogenology
https://www.readbyqxmd.com/read/28938470/genetic-disruption-of-21-hydroxylase-in-zebrafish-causes-interrenal-hyperplasia
#2
Helen Eachus, Andreas Zaucker, James A Oakes, Aliesha Griffin, Meltem Weger, Tülay Güran, Angela Taylor, Abigail Harris, Andy Greenfield, Jonathan L Quanson, Karl-Heinz Storbeck, Vincent T Cunliffe, Ferenc Müller, Nils Krone
Congenital adrenal hyperplasia is a group of common inherited disorders leading to glucocorticoid deficiency. Most cases are caused by 21-hydroxylase deficiency (21OHD). The systemic consequences of imbalanced steroid hormone biosynthesis due to severe 21OHD remains poorly understood. Therefore, we have developed a zebrafish model for 21OHD, which focuses on the impairment of glucocorticoid biosynthesis. A single 21-hydroxylase gene (cyp21a2) is annotated in the zebrafish genome based on sequence homology. Our in silico analysis of the Cyp21a2 protein sequence suggests a sufficient degree of similarity for the usage of zebrafish cyp21a2 to model aspects of human 21OHD in vivo...
September 13, 2017: Endocrinology
https://www.readbyqxmd.com/read/28934192/metabolomics-and-cognition-in-african-american-adults-in-midlife-the-atherosclerosis-risk-in-communities-study
#3
J Bressler, B Yu, T H Mosley, D S Knopman, R F Gottesman, A Alonso, A R Sharrett, L M Wruck, E Boerwinkle
Clinical studies have shown alterations in metabolic profiles when patients with mild cognitive impairment and Alzheimer's disease dementia were compared to cognitively normal subjects. Associations between 204 serum metabolites measured at baseline (1987-1989) and cognitive change were investigated in 1035 middle-aged community-dwelling African American participants in the biracial Atherosclerosis Risk in Communities (ARIC) Study. Cognition was evaluated using the Delayed Word Recall Test (DWRT; verbal memory), the Digit Symbol Substitution Test (DSST; processing speed) and the Word Fluency Test (WFT; verbal fluency) at visits 2 (1990-1992) and 4 (1996-1998)...
July 18, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28926640/aire-deficient-mice-provide-a-model-of-corneal-and-lacrimal-gland-neuropathy-in-sj%C3%A3-gren-s-syndrome
#4
Feeling Y Chen, Albert Lee, Shaokui Ge, Sara Nathan, Sarah M Knox, Nancy A McNamara
Sjögren's syndrome (SS) is a chronic, autoimmune exocrinopathy that leads to severe dryness of the mouth and eyes. Exocrine function is highly regulated by neuronal mechanisms but little is known about the link between chronic inflammation, innervation and altered exocrine function in the diseased eyes and exocrine glands of SS patients. To gain a better understanding of neuronal regulation in the immunopathogenesis of autoimmune exocrinopathy, we profiled a mouse model of spontaneous, autoimmune exocrinopathy that possess key characteristics of peripheral neuropathy experienced by SS patients...
2017: PloS One
https://www.readbyqxmd.com/read/28924252/comprehensive-analysis-of-lncrnas-and-mrnas-in-skeletal-muscle-of-rainbow-trout-oncorhynchus-mykiss-exposed-to-estradiol
#5
Jian Wang, Prasanthi P Koganti, Jianbo Yao, Shuo Wei, Beth Cleveland
Estradiol (E2) is a steroid hormone that negatively affects muscle growth in rainbow trout (Oncorhynchus mykiss), but the mechanisms directing with this response are not fully understood. To better characterize the effects of E2 in muscle, we identified differentially regulated mRNAs and lncRNAs in juvenile rainbow trout exposed to E2. Here, we performed next-generation RNA sequencing and comprehensive bioinformatics analyses to characterize the transcriptome profiles, including mRNAs and long noncoding RNAs (lncRNAs), in skeletal muscle of rainbow trout injected with E2...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28923543/selective-glucocorticoid-receptor-modulation-inhibits-cytokine-responses-in-a-canine-model-of-mild-endotoxemia
#6
J Bartko, U Derhaschnig, T Neels, G H Nabozny, C Harcken, J Leuschner, F De Vries, B Jilma
Selective glucocorticoid receptor modulators (GRMs) promise to reduce adverse events of glucocorticoids while maintaining anti-inflammatory potency. The present study tested the anti-inflammatory activity of two novel non-steroidal GRMs (GRM1: BI 607812 BS, GRM2: BI 653048 BS*H3PO4) in comparison to prednisolone in a canine model of low dose endotoxemia. This study compared the anti-inflammatory and pharmacokinetic profile of escalating daily oral doses of GRM1 (1, 2.5, 5 and 10mg/kg) and GRM2 (0.1, 0.25 and 1mg/kg) with prednisolone (0...
September 15, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28919798/comparative-effects-of-the-%C3%AF-3-polyunsaturated-fatty-acid-derivatives-resolvins-e1-and-d1-and-protectin-dx-in-models-of-inflammation-and-pain
#7
Flávia Cs Fonseca, Ricardo M Orlando, Regina Mm Turchetti-Maia, Janetti Nogueira de Francischi
PURPOSE: Specialized pro-resolving lipid mediators (SPMs), also known as lipoxins, resolvins (Rvs), protectins and maresins, have been implicated in the resolution of the inflammatory process. However, a systematic comparison of their activity in the relief of inflammation and pain models is still lacking. MATERIALS AND METHODS: The effects of Rvs E1 and D1 and protectin DX (PDX) were assessed in rat paws inflamed by the standard proinflammatory stimulus carrageenan or by histamine, 5-hydroxytryptamine, substance P or prostaglandin E2...
2017: Journal of Inflammation Research
https://www.readbyqxmd.com/read/28918590/the-role-of-diet-in-shaping-the-chemical-signal-design-of-lacertid-lizards
#8
Simon Baeckens, Roberto García-Roa, José Martín, Raoul Van Damme
Lizards communicate with others via chemical signals, the composition of which may vary among species. Although the selective pressures and constraints affecting chemical signal diversity at the species level remain poorly understood, the possible role of diet has been largely neglected. The chemical signals of many lizards originate from the femoral glands that exude a mixture of semiochemicals, and may be used in a variety of contexts. We analyzed the lipophilic fraction of the glandular secretions of 45 species of lacertid lizard species by gas chromatography/mass spectrometry...
September 16, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28914695/autoimmune-acute-liver-failure-and-seronegative-autoimmune-liver-disease-in-children-are-they-different-from-classical-disease
#9
Vikas Jain, Anshu Srivastava, Surender K Yachha, Niraj Kumari, Rachana Kathuria, Moinak S Sarma, Ujjal Poddar, Narendra Krishnani
OBJECTIVES: Presentation as autoimmune acute liver failure (AI-ALF) and seronegative autoimmune liver disease (SN-AILD) represents two uncommon variants of AILD. We compared the clinical profile and outcome of AI-ALF with autoimmune-non-acute liver failure (AI-non-ALF) and also SN-AILD with seropositive autoimmune liver disease (SP-AILD). MATERIALS AND METHODS: Children managed as AI-ALF and AI-non-ALF including SN-AILD and SP-AILD were enrolled and compared. AI-non-ALF was diagnosed by simplified diagnostic criteria and AI-ALF by Pediatric Acute Liver Failure Study Group criteria with positive autoantibody, exclusion of other etiologies, elevated immunoglobulin G and histology when available...
September 13, 2017: European Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28911799/effects-of-glucocorticoids-on-stratum-corneum-lipids-and-function-in-human-skin-a-detailed-lipidomic-analysis
#10
Mads A Røpke, Cristina Alonso, Sora Jung, Hanne Norsgaard, Claudia Richter, Maxim E Darvin, Thomas Litman, Annika Vogt, Jürgen Lademann, Ulrike Blume-Peytavi, Jan Kottner
BACKGROUND: Topical glucocorticoids (GCs) are known to induce atrophy of human skin including thinning of epidermal and dermal compartments by influencing keratinocyte proliferation and synthesis of extracellular matrix proteins. GCs are also known to reduce skin barrier integrity but little is known about the changes in lipid composition in human skin following topical administration of GCs. OBJECTIVE: This study investigated the effects of GCs on stratum corneum (SC) function and lipid profile of human skin in vivo...
August 26, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/28910962/pharmaceuticals-and-other-anthropogenic-chemicals-in-atmospheric-particulates-and-precipitation
#11
Mark L Ferrey, M Coreen Hamilton, Will J Backe, Kurt E Anderson
Air and precipitation samples were analyzed by liquid chromatography tandem mass spectrometry (LC-MS/MS) and gas chromatography mass spectrometry (GC-MS) for pharmaceuticals, personal care products, and other commercial chemicals within the St. Paul/Minneapolis metropolitan area of Minnesota, U.S. Of the 126 chemicals analyzed, 17 were detected at least once. Bisphenol A, N,N-diethyl-meta-toluamide (DEET), and cocaine were the most frequently detected; their maximum concentrations in snow were 3.80, 9.49, and 0...
September 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28904054/a-13-steroid-serum-panel-based-on-lc-ms-ms-use-in-detection-of-adrenocortical-carcinoma
#12
David R Taylor, Lea Ghataore, Lewis Couchman, Royce P Vincent, Ben Whitelaw, Dylan Lewis, Salvador Diaz-Cano, Gabriele Galata, Klaus-Martin Schulte, Simon Aylwin, Norman F Taylor
BACKGROUND: Adrenocortical carcinoma (ACC) is a rare malignancy, with an annual incidence of 1 or 2 cases per million. Biochemical diagnosis is challenging because up to two-thirds of the carcinomas are biochemically silent, resulting from de facto enzyme deficiencies in steroid hormone biosynthesis. Urine steroid profiling by GC-MS is an effective diagnostic test for ACC because of its capacity to detect and quantify the increased metabolites of steroid pathway synthetic intermediates...
September 13, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28902923/molecular-microbiological-and-clinical-characterization-of-clostridium-difficile-isolates-from-tertiary-care-hospitals-in-colombia
#13
Clara Lina Salazar, Catalina Reyes, Santiago Atehortua, Patricia Sierra, Margarita María Correa, Daniel Paredes-Sabja, Emma Best, Warren N Fawley, Mark Wilcox, Ángel González
In Colombia, the epidemiology and circulating genotypes of Clostridium difficile have not yet been described. Therefore, we molecularly characterized clinical isolates of C.difficile from patients with suspicion of C.difficile infection (CDI) in three tertiary care hospitals. C.difficile was isolated from stool samples by culture, the presence of A/B toxins were detected by enzyme immunoassay, cytotoxicity was tested by cell culture and the antimicrobial susceptibility determined. After DNA extraction, tcdA, tcdB and binary toxin (CDTa/CDTb) genes were detected by PCR, and PCR-ribotyping performed...
2017: PloS One
https://www.readbyqxmd.com/read/28901724/codeine-influences-the-serum-and-urinary-profile-of-endogenous-androgens-but-does-not-interact-with-the-excretion-rate-of-administered-testosterone
#14
M Lehtihet, A Andersson, A Börjesson, J Schulze, A Rane, M Ericsson, L Ekström
Today's doping tests involve longitudinal monitoring of urinary steroids including the testosterone glucuronide and epitestosterone glucuronide ratio (T/E) in an athlete biological passport (ABP). The aim of this study was to investigate the possible influence of short term use of codeine on the urinary excretion of androgen metabolites included in the steroidal module of the passport prior to and after the co-administration with testosterone. The study was designed as an open study with the subjects being their own control...
September 13, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28894082/chronic-inflammatory-demyelinating-polyneuropathy-cidp-an-uncommon-manifestation-of-systemic-lupus-erythematosus-sle
#15
Hrudya Abraham, Jose Kuzhively, Syed W Rizvi
BACKGROUND Chronic inflammatory demyelinating polyneuropathy (CIDP) is an uncommon manifestation of systemic lupus erythematosus (SLE). We report a case of SLE presenting as CIDP and discuss the diagnosis, management, and prognosis of CIDP. CASE REPORT A 40-year-old woman with a past medical history of SLE treated with hydroxychloroquine presented with bilateral, progressive, ascending, sensory and motor neuropathy. Physical examination showed weakness and reduced temperature of all extremities, reduced pinprick and vibration sense of the distal extremities, loss of reflexes, and walking with a wide-based unsteady gait...
September 12, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28893623/cyp17a1-inhibitor-abiraterone-an-anti-prostate-cancer-drug-also-inhibits-the-21-hydroxylase-activity-of-cyp21a2
#16
Jana Malikova, Simone Brixius-Anderko, Sameer S Udhane, Shaheena Parween, Bernhard Dick, Rita Bernhardt, Amit V Pandey
Abiraterone is an inhibitor of CYP17A1 which is used for the treatment of castration resistant prostate cancer. Abiraterone is known to inhibit several drug metabolizing cytochrome P450 enzymes including CYP1A2, CYP2D6, CYP2C8, CYP2C9, CYP2C19, CYP3A4 and CYP3A5, but its effects on steroid metabolizing P450 enzymes are not clear. In preliminary results, we had observed inhibition of CYP21A2 by 1μM abiraterone. Here we are reporting the effect of abiraterone on activities of CYP21A2 in human adrenal cells as well as with purified recombinant CYP21A2...
September 8, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28891941/cox-inhibition-profile-and-molecular-docking-studies-of-some-2-trimethoxyphenyl-thiazoles
#17
Smaranda Dafina Oniga, Liliana Pacureanu, Cristina Ioana Stoica, Mariana Doina Palage, Alexandra Crăciun, Laurentiu Răzvan Rusu, Elena-Luminita Crisan, Cătălin Araniciu
Non-steroidal anti-inflammatory drugs (NSAIDs) are commonly used therapeutic agents that exhibit frequent and sometimes severe adverse effects, including gastrointestinal ulcerations and cardiovascular disorders. In an effort to obtain safer NSAIDs, we assessed the direct cyclooxygenase (COX) inhibition activity and we investigated the potential COX binding mode of some previously reported 2-(trimethoxyphenyl)-thiazoles. The in vitro COX inhibition assays were performed against ovine COX-1 and human recombinant COX-2...
September 9, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28887174/gas-chromatography-tandem-mass-spectrometry-offers-advantages-for-urinary-steroids-analysis
#18
Natalie Homer, Sanjay Kothiya, Alison Rutter, Brian R Walker, Ruth Andrew
Gas chromatography mass spectrometry has been the lynchpin of clinical assessment of steroid profiles for ∼3 decades. The improvements in assay performance offered by tandem mass spectrometry were assessed. Across the spectrum of glucocorticoid and androgen analytes tested, limits of detection and quantitation were ∼20 fold lower with triple than single quadrupole systems, but the more noticeable improvement was that signal to noise was substantially improved and the linear range wider. These benefits allowed more reliable and concomitant measurement of steroids with substantially different abundances and in smaller volumes of urine...
September 5, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/28885223/prescription-audit-of-nsaids-and-gastroprotective-strategy-in-elderly-in-primary-care
#19
Khalid Ahmed Jassim Al Khaja, Sindhan Veeramuthu, Husain Ahmed Isa, Reginald Paul Sequeira
BACKGROUND: The use of non-steroidal anti-inflammatory drug (NSAIDs) is deemed a major risk factor for peptic ulcer disease in elderly population that requires concomitant therapy with gastroprotective agents (GPAs). OBJECTIVE: This study evaluated the rational prescribing of NSAIDs and GPAs, and extent of adherence to the guideline recommendations in primary care. METHODS: Nationwide audit of prescriptions issued to elderly patients (≥65 years) with hypertension or diabetic hypertension in primary care...
2017: International Journal of Risk & Safety in Medicine
https://www.readbyqxmd.com/read/28882733/-risk-of-fatal-non-fatal-events-in-patients-with-previous-coronary-heart-disease-acute-myocardial-infarction-and-treatment-with-non-steroidal-anti-inflammatory-drugs
#20
REVIEW
L Muñoz Olmo, J Juan Armas, J J Gomariz García
BACKGROUND: Primary Care is the fundamental axis of our health system and obliges us to be consistent with our prescriptions. The non-steroidal anti-inflammatory drugs (NSAIDs) have been associated with increased cardiovascular risk and increased risk of all causes of death, as well as acute myocardial infarction (AMI) in patients with a previous myocardial infarction. Pain and cardiac patient management are 2 basic pillars in our daily activity, and we must know the limitations of NSAIDs in patients with established cardiovascular risk...
September 4, 2017: Semergen
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