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https://www.readbyqxmd.com/read/28435101/interaction-of-glucocorticoids-and-progesterone-derivatives-with-human-serum-albumin
#1
Rola Abboud, Mohammad Akil, Catherine Charcosset, Hélène Greige-Gerges
Glucocorticoids (GCs) and progesterone derivatives (PGDs) are steroid hormones with well-known biological activities. Their interaction with human serum albumin (HSA) may control their distribution. Their binding to albumin is poorly studied in literature. This paper deals with the interaction of a series of GCs (cortisol, cortisone, prednisolone, prednisone, 6-methylprednisolone and 9-fluorocortisol acetate) and PGDs (progesterone, hydroxylated PGDs, methylated PGDs and dydrogesterone) with HSA solution (pH 7...
April 20, 2017: Chemistry and Physics of Lipids
https://www.readbyqxmd.com/read/28419184/mechanisms-for-the-species-difference-between-mouse-and-pig-oocytes-in-their-sensitivity-to-glucorticoids%C3%A2
#2
Shuai Gong, Guang-Yi Sun, Min Zhang, Hong-Jie Yuan, Shuai Zhu, Guang-Zhong Jiao, Ming-Jiu Luo, Jing-He Tan
Although in vitro exposure to physiological concentrations of glucorticoids did not affect maturation of mouse oocytes, it significantly inhibited nuclear maturation of pig oocytes. Studies on this species difference in oocyte sensitivity to glucocorticoids will contribute to our understanding of how stress/glucocorticoids affect oocytes. This study showed that glucorticoid receptors (NR3C1) were expressed in both oocytes and cumulus cells (CCs) of both pigs and mice; however, while cortisol inhibition of oocyte maturation was overcome by NR3C1 inhibitor RU486 in pigs, it could not be relieved by RU486 in mice...
April 17, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28417588/a-scalable-and-versatile-synthesis-of-oxime-based-hormone-dimers-and-gels-for-sustained-release
#3
Christopher W Bennett, Joe Collins, Zeyun Xiao, Daniel Klinger, Luke A Connal
Well-defined steroid hormone dimers and organogels were produced via a facile and scalable synthesis using oxime click chemistry. The versatile synthetic procedure extends to a wide range of hormones and linker groups exemplified here through the synthesis of cortisol- and progesterone-dimers linked via hydrophobic, hydrophilic or functional groups. This method was also extended to the synthesis of cortisone-based organogels. Owing to the dynamic nature of the oxime bond, the hormone-based materials are degradable via acidic hydrolysis and transoximination representing new materials for the controlled release of steroid hormones...
April 18, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28415914/sealing-of-the-round-and-oval-window-niches-with-triamcinolone-soaked-fascia-as-salvage-surgical-therapy-in-sudden-sensorineural-hearing-loss
#4
Benjamin Loader, Rudolf Seemann, Claudia Atteneder, Elisabeth Sterrer, Peter Franz, Claudia Lill
CONCLUSIONS: Triamcinolone-soaked fascia seems to show better hearing improvement when added to tympanotomy for sudden idiopathic sensorineural hearing loss (SSHL), compared to fascia round window occlusion without triamcinolone. OBJECTIVES: To analyse if adding triamcinolone to sealing the round and oval window niches with fascia results in improved audiological outcome for acute SNHL. METHODS: Fifty-three patients (27m:43 ± 12 years, 26f:45 ± 14 years) with acute SSHL ≥50dB over 3 frequencies, who failed primary therapy, underwent transcanal tympanotomy...
April 18, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28407311/biological-variability-in-serum-cortisol-concentration-post-adrenocorticotropic-hormone-stimulation-in-healthy-dogs
#5
A Gal, K Weidgraaf, J P Bowden, N Lopez-Villalobos, N J Cave, J P Chambers, F Castillo-Alcala
BACKGROUND: The ACTH stimulation has low sensitivity for the diagnosis of hypercortisolism possibly as a result of biological and analytical variability. HYPOTHESIS/OBJECTIVES: To report the components of biological and analytical variability in serum cortisol concentration post-ACTH stimulation ([cortisol]) in healthy dogs. ANIMALS: Fourteen healthy harrier hound dogs. METHODS: The data were extracted from a separate, prospective, randomized, double-blinded, controlled discovery study in which dogs treated with vehicle control and 4 different doses of cortisone acetate (CA) for 7 days had an ACTH stimulation test performed to confirm the dose-dependent effect of CA...
April 13, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28398098/mapk-signaling-has-stage-dependent-osteogenic-effects-on-human-adipose-derived-stem-cells-in-vitro
#6
Eric J Tsang, Benjamin Wu, Patricia Zuk
PURPOSE: The use of pro-osteogenic growth factors, such as BMP2, in human adipose-derived stem cell (ASC) osteogenesis is well described. Because these growth factors work via signal transduction pathways, such as the mitogen-activated protein kinase (MAPK) cascade, a study of the relationship between MAPK signaling and ASC osteogenesis was conducted. METHODS: ERK, JNK, and p38MAPK activation were measured in ASCs osteo-induced using either dexamethasone or vitamin D3 and correlated to mineralization...
April 11, 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/28375882/salivary-cortisol-and-cortisone-in-the-clinical-setting
#7
Joanne Blair, Jo Adaway, Brian Keevil, Richard Ross
PURPOSE OF REVIEW: A resurgence of interest in salivary biomarkers has generated evidence for their value in assessing adrenal function. The advantages of salivary measurements include only free hormone is detected, samples can be collected during normal daily routines and stress-induced cortisol release is less likely to occur than during venepuncture. We review the use of salivary biomarkers to diagnose and monitor patients for conditions of cortisol excess and deficiency and discuss the value of measuring salivary cortisone versus salivary cortisol...
April 3, 2017: Current Opinion in Endocrinology, Diabetes, and Obesity
https://www.readbyqxmd.com/read/28373267/longitudinal-analyses-of-the-steroid-metabolome-in-obese-pcos-girls-with-weight-loss
#8
Thomas Reinehr, Alexandra Kulle, Juliane Rothermel, Caroline Knop, Nina Lass, Christina Bosse, Paul-Martin Holterhus
OBJECTIVE: The underlying mechanisms of polycystic ovarian syndrome (PCOS) are not fully understood yet. The aim of the study was to get functional insights into the regulation of steroid hormones in PCOS by steroid metabolomics. DESIGN: This is a longitudinal study of changes of steroid hormones in 40 obese girls aged 13-16 years (50% with PCOS) participating in a 1-year lifestyle intervention. Girls with and without PCOS were matched to age, BMI, and change of weight status...
April 3, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28366868/recent-advances-in-the-study-of-11%C3%AE-hydroxysteroid-dehydrogenase-type-2-11%C3%AE-hsd2-inhibitors
#9
REVIEW
Chunchun Zhou, Fan Ye, He Wu, Hui Ye, Quanxu Chen
11β-Hydroxysteroid dehydrogenase (11β-HSD), which interconverts hormonally active cortisol and inactive cortisone in multiple human tissues, has two distinct isoforms named 11β-hydroxysteroid dehydrogenase 1 (11β-HSD1) and 11β-hydroxysteroid dehydrogenase 2 (11β-HSD2). 11β-HSD2 is an NAD(+)-dependent oxidase which lowers cortisol by converting it to cortisone while 11β-HSD1 mainly catalyzes the reduction which converts cortisone into cortisol. Selective inhibition of 11β-HSD2 is generally detrimental to health because the accumulation of cortisol can cause metabolic symptoms such as apparent mineralocorticoid excess (AME), fetal developmental defects and lower testosterone levels in males...
March 21, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28365516/charged-derivatization-and-on-line-solid-phase-extraction-to-measure-extremely-low-cortisol-and-cortisone-levels-in-human-saliva-with-liquid-chromatography-tandem-mass-spectrometry
#10
Balázs Magda, Zoltán Dobi, Katalin Mészáros, Éva Szabó, Zoltán Márta, Tímea Imre, Pál T Szabó
The aim of this study was to develop a sensitive, reliable and high-throughput liquid chromatography - electrospray ionization - mass spectrometric (LC-ESI-MS/MS) method for the simultaneous quantitation of cortisol and cortisone in human saliva. Derivatization with 2-hydrazino-1-methylpyridine (HMP) was one of the most challenging aspects of the method development. The reagent was reacting with cortisol and cortisone at 60°C within 1h, giving mono- and bis-hydrazone derivatives. Investigation of derivatization reaction and sample preparation was detailed and discussed...
June 5, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28363270/hip-pain-dry-needling-versus-cortisone-injections
#11
(no author information available yet)
Greater trochanteric pain syndrome (GTPS) is chronic, intermittent pain and tenderness on the outside of the hip. The medical community once thought that a swollen hip bursa was the source of such pain, which led to the use of corticosteroid injections to the bursa to help decrease swelling and pain. However, researchers now believe that injuries to the muscles and tendons around the hip are the actual cause of this pain, and that inflammation is often not involved. A study published in the April 2017 issue of JOSPT explores dry needling as an alternative to cortisone injections to reduce pain and improve function in patients with GTPS...
April 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28359965/detailed-analysis-of-cortisol-cortisone-and-their-tetrahydro-and-allo-tetrahydrometabolites-in-human-urine-by-lc-ms-ms
#12
Katarzyna Kosicka, Anna Siemiątkowska, Dąbrówka Pałka, Agata Szpera-Goździewicz, Grzegorz H Bręborowicz, Franciszek K Główka
Cortisol (F) and cortisone (E) are metabolized to A-ring reduced metabolites in the reactions catalyzed by 5α- and 5β-reductase. 5α-tetrahydrocortisol (alloTHF) and 5β-tetrahydrocortisol (THF) are produced from F. The metabolism of E takes place in analogy to form alloTHE and THE. Up to now, the analysis of endogenous glucocorticoids did not consider alloTHE, limiting the metabolism of E to THE only. Nevertheless, such simplification can generate inaccuracy in the assessment of the function of enzymes crucial for glucocorticoids metabolism: 11β-hydroxysteroid dehydrogenase type 1 and type 2 (11β-HSD1 and 11β-HSD2), as well as 5α- and 5β-reductase...
June 5, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28356371/metabolomics-analysis-identifies-different-metabotypes-of-asthma-severity
#13
Stacey N Reinke, Héctor Gallart-Ayala, Cristina Gómez, Antonio Checa, Alexander Fauland, Shama Naz, Muhammad Anas Kamleh, Ratko Djukanović, Timothy S C Hinks, Craig E Wheelock
In this study, we sought to determine whether asthma has a metabolic profile and whether this profile is related to disease severity.We characterised the serum from 22 healthy individuals and 54 asthmatics (12 mild, 20 moderate, 22 severe) using liquid chromatography-high-resolution mass spectrometry-based metabolomics. Selected metabolites were confirmed by targeted mass spectrometry assays of eicosanoids, sphingolipids and free fatty acids.We conclusively identified 66 metabolites; 15 were significantly altered with asthma (p≤0...
March 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28347660/effect-of-genetic-polymorphism-on-the-inhibition-of-dopamine-formation-from-p-tyramine-catalyzed-by-brain-cytochrome-p450-2d6
#14
Toshiro Niwa, Marina Shizuku, Kaori Yamano
The inhibitory effects of steroid hormones, including glucocorticoids such as cortisol, and related compounds on dopamine formation from p-tyramine, catalyzed by cytochrome P450 (CYP) 2D6.2 (Arg296Cys, Ser486Thr) and CYP2D6.10 (Pro34Ser, Ser486Thr) were compared with the effects of those catalyzed by CYP2D6.1 (wild type), to investigate the effect of a CYP2D6 polymorphism on neuroactive amine metabolism in the brain. Inhibition constants (Ki) or 50% inhibitory concentrations of six steroid hormones (cortisol, cortisone, corticosterone, dehydroepiandrosterone, progesterone, and pregnenolone) and quinidine and quinine-typical potent inhibitors of the human CYP2D6 and rat CYP2D subfamily, respectively-toward dopamine formation catalyzed by CYP2D6...
April 15, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28342428/revealing-the-influence-of-glucocorticoid-treatment-on-the-excretion-of-anabolic-androgenic-steroids-in-horses-through-in-vitro-digestive-simulations-and-an-in-vivo-case-study
#15
Anneleen Decloedt, Sander Damen, Lynn Vanhaecke
Anabolic-androgenic steroids (AAS) are strictly forbidden in equine sports because of their stimulating effect on muscle growth and performance. Nevertheless, low levels of AAS have been found in some horses, untreated with AAS. Glucocorticoids (GC), used as an anti-inflammatory therapy and structurally related to AAS, might play a role in this phenomenon. In order to unravel this possible correlation the influence of glucocorticoid treatment on the excretion of AAS was studied both in vivo and in vitro. In vivo effects were investigated by analysing urine samples collected from a gelding treated with betamethasone...
February 24, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28335807/time-dependent-association-of-glucocorticoids-with-adverse-outcome-in-community-acquired-pneumonia-a-6-year-prospective-cohort-study
#16
Manuela Nickler, Manuel Ottiger, Christian Steuer, Alexander Kutz, Mirjam Christ-Crain, Werner Zimmerli, Robert Thomann, Claus Hoess, Christoph Henzen, Luca Bernasconi, Andreas Huber, Beat Mueller, Philipp Schuetz
BACKGROUND: The hypothalamic-pituitary-adrenal stress axis plays a crucial role in community-acquired pneumonia (CAP), with high cortisol being associated with disease severity and corticosteroid treatment resulting in earlier time to recovery. Our aim in the present study was to compare different glucocorticoid hormones, including cortisol, 11-deoxycortisol, cortisone, and corticosterone, regarding their association with short- and long-term adverse outcomes in a well-defined CAP cohort...
March 24, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28326749/a-case-of-autoimmune-polyendocrine-syndrome-type-i-with-strong-positive-gad-antibody-titer-followed-up-with-glucose-tolerance-measured-by-oral-glucose-tolerance-test
#17
Rie Murakami, Toshihide Kawai, Shu Meguro, Matsuhiko Hayashi, Hiroshi Itoh
A 26-year-old Japanese woman presented with adrenal insufficiency, and treatment was started with cortisone and fludrocortisone in 1975. A few years later, she presented with hypoparathyroidism and was diagnosed with autoimmune polyendocrine syndrome type I (APS I), and treatment with calcium and alfacalcidol was started. She was found to have subacute thyroiditis and relative adrenal failure in 2006. Her condition remained stable under treatment with cortisone, fludrocortisone, levothyroxine, calcium lactate, precipitated calcium carbonate and alfacalcidol...
January 2017: Neuro Endocrinology Letters
https://www.readbyqxmd.com/read/28321257/class-specific-histone-deacetylase-inhibitors-promote-11-beta-hydroxysteroid-dehydrogenase-type-2-expression-in-jeg-3-cells
#18
Katie L Togher, Louise C Kenny, Gerard W O'Keeffe
Exposure to maternal cortisol plays a crucial role in fetal organogenesis. However, fetal overexposure to cortisol has been linked to a range of short- and long-term adverse outcomes. Normally, this is prevented by the expression of an enzyme in the placenta called 11-beta hydroxysteroid dehydrogenase type 2 (11β-HSD2) which converts active cortisol to its inactive metabolite cortisone. Placental 11β-HSD2 is known to be reduced in a number of adverse pregnancy complications, possibly through an epigenetic mechanism...
2017: International Journal of Cell Biology
https://www.readbyqxmd.com/read/28304112/evaluation-of-various-approaches-to-the-isolation-of-steroid-hormones-from-urine-samples-prior-to-fass-mekc-analysis
#19
Ilona Olędzka, Piotr Kowalski, Alina Plenis, Tomasz Bączek
The goal of this study was to assess various analytical approaches for the simultaneous and efficient extraction of steroid hormones (cortisone, cortisol, prednisolone, corticosterone, testosterone, 17α-methyltestosterone, epitestosterone, progesterone) from urine samples prior to separation based on field-amplified sample stacking-micellar electrokinetic chromatography (FASS-MEKC). FASS-MEKC successfully allowed the compounds to be separated within 12 min using a background electrolyte (BGE) comprised of 5 mM sodium tetraborate, 150 mM boric acid, 50 mM SDS and 15% methanol...
March 17, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28301846/programming-of-the-hypothalamus-pituitary-adrenal-axis-by-very-preterm-birth
#20
Martijn J J Finken, Bibian van der Voorn, Jonneke J Hollanders, Charlotte A Ruys, Marita de Waard, Johannes B van Goudoever, Joost Rotteveel
BACKGROUND: Many very preterm (i.e., <32 weeks of gestation) newborns fail to mount an adequate adrenocortical response to stress or illness, termed relative adrenal insufficiency. Conversely, later in life these infants show features of increased glucocorticoid bioactivity, such as abdominal adiposity, insulin resistance, raised blood pressure, shorter stature and internalizing problem behavior. SUMMARY: Studies suggested that very preterm newborns have impairments along multiple levels of the hypothalamus-pituitary-adrenal (HPA) axis...
March 17, 2017: Annals of Nutrition & Metabolism
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