keyword
MENU ▼
Read by QxMD icon Read
search

Cortisone

keyword
https://www.readbyqxmd.com/read/28634849/characterization-of-new-recombinant-3-ketosteroid-%C3%AE-1-dehydrogenases-for-the-biotransformation-of-steroids
#1
Xiaojun Wang, Jinhui Feng, Dalong Zhang, Qiaqing Wu, Dunming Zhu, Yanhe Ma
3-Ketosteroid-Δ(1)-dehydrogenases (KstDs [EC 1.3.99.4]) catalyze the Δ(1)-dehydrogenation of steroids and are a class of important enzymes for steroid biotransformations. In this study, we cloned 12 putative KstD-encoding (kstd) genes from both fungal and Gram-positive microorganisms and attempted to overproduce the recombinant proteins in E. coli BL21(DE3). Five successful recombinant enzymes catalyzed the Δ(1)-desaturation of a variety of steroidal compounds such as 4-androstene-3,17-dione (AD), 9α-hydroxy-4-androstene-3,17-dione (9-OH-AD), hydrocortisone, cortisone, and cortexolone...
June 20, 2017: Applied Microbiology and Biotechnology
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/28590513/diagnostic-accuracy-of-increased-urinary-cortisol-cortisone-ratio-to-differentiate-acth-dependent-cushing-s-syndrome
#3
Filippo Ceccato, Laura Trementino, Mattia Barbot, Giorgia Antonelli, Mario Plebani, Luca Denaro, Daniela Regazzo, Federico Rea, Anna Chiara Frigo, Carolina Concettoni, Marco Boscaro, Giorgio Arnaldi, Carla Scaroni
BACKGROUND AND AIM: Differential diagnosis between Cushing's Disease (CD) and Ectopic ACTH Syndrome (EAS) may be a pitfall for endocrinologists. The increasing use in clinical practice of chromatography and mass spectrometry improves the measurement of urinary free cortisol (UFF) and cortisone (UFE). We have recently observed that cortisol to cortisone ratio (FEr) was higher in a small series of EAS; in this paper we collected a larger number of ACTH-dependent CS to study the role of FEr to characterize the source of corticotropin secretion...
June 7, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28585087/corticosteroids-and-aldose-reductase-inhibitor-epalrestat-modulates-cardiac-action-potential-via-kv%C3%AE-1-1-akr6a8-subunit-of-voltage-gated-potassium-channel
#4
Jared Tur, Sachin L Badole, Feng Cheng, Aparoop Das, Rakesh C Kukreja, Srinivas M Tipparaju
We previously demonstrated the role of Kvβ1.1 subunit of voltage-activated potassium channel in heart for its sensory roles in detecting changes in NADH/NAD and modulation of ion channel. However, the pharmacological role for the association of Kvβ1 via its binding to ligands such as cortisone and its analogs remains unknown. Therefore, we investigated the significance of Kvβ1.1 binding to cortisone analogs and AR inhibitor epalrestat. In addition, the aldose reductase (AR) inhibitor epalrestat was identified as a pharmacological target and modulator of cardiac activity via binding to the Kvβ1 subunit...
June 5, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28556446/multi-residue-analysis-of-glucocorticoids-in-milk-by-lc-ms-ms-with-low-temperature-purification-and-dispersive-solid-phase-extraction
#5
Lili Ma, Xiaojing Fan, Li Jia, Jiaqi Wang, Suli Wang, Liuwei Zhao
A multi-residue method for the determination of 12 glucocorticoids (clobetasol propionate, budesonide, triamcinolone, triamcinolone acetonide, fludrocortisone acetate, flumethasone, beclomethasone, prednisone acetate, 6-α-methylprednisolone, hydrocortisone, cortisone and prednisone) in bovine milk was developed using liquid chromatography with tandem mass spectrometry. Isoflupredone was used as an internal standard. Milk samples were treated with ethyl acetate to extract glucocorticoids and were frozen at -20°C for 6 h to precipitate fat...
May 27, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28540396/-anaphylactic-reactions-to-vaccines-chicken-egg-allergy-and-the-influenza-h1n1-vaccination
#6
L Klimek, S Wicht-Langhammer, L von Bernus, C Thorn, D Cazan, O Pfaar, K Hörmann
BACKGROUND: Allergic reactions to influenza vaccinations are a well-known phenomenon; however, only a few published statistics give information on the risks. Patients with a chicken egg allergy must be particularly carefully handled during an influenza epidemic where vaccines produced using embryonated chicken eggs are primarily employed. METHODS: A selective literature review and analysis of the problem of allergic reactions to vaccinations was performed. RESULTS: The two most common relative contraindications among patients to be vaccinated are the presence of an egg allergy and a previous anaphylactic reaction to vaccination...
May 24, 2017: HNO
https://www.readbyqxmd.com/read/28539166/can-secondary-osteoporosis-be-identified-when-screening-for-osteoporosis-with-digital-x-ray-radiogrammetry-initial-results-from-the-stockholm-osteoporosis-project-stop
#7
Michael L Wilczek, Johan Kälvesten, Ingrid Bergström, Ylva Pernow, Maria Sääf, Bo Freyschuss, Torkel B Brismar
OBJECTIVES: To identify causes of low age-adjusted bone mass at digital X-ray radiogrammetry (DXR) in individuals attending an osteoporosis screening program. STUDY DESIGN: In a descriptive observational cohort study, women aged 40-75 years who attended a general mammography screening program had their bone mass investigated with DXR and answered a questionnaire regarding several clinical risk factors for osteoporosis. Each month the 2% with the lowest Z-scores were selected for further clinical examination with DXA of the hip and lumbar spine and pre-defined blood tests...
July 2017: Maturitas
https://www.readbyqxmd.com/read/28525786/steroid-bioaccumulation-profiles-in-typical-freshwater-aquaculture-environments-of-south-china-and-their-human-health-risks-via-fish-consumption
#8
Shan Liu, Xiang-Rong Xu, Zhan-Hui Qi, Hui Chen, Qin-Wei Hao, Yong-Xia Hu, Jian-Liang Zhao, Guang-Guo Ying
More attention was previously paid to adverse effects of steroids on aquatic organisms and their ecological risks to the aquatic environment. So far, little information has been reported on the bioaccumulative characteristics of different classes of steroids in cultured fish tissues. The present study for the first time provided a comprehensive analysis of the occurrence, bioaccumulation, and global consumers' health risks via fish consumption of androgens, glucocorticoids and progestanges in typical freshwater cultured farms in South China...
May 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28523515/distribution-of-exogenous-and-endogenous-cyp3a-markers-and-related-factors-in-healthy-males-and-females
#9
Jieon Lee, Andrew HyoungJin Kim, SoJeong Yi, SeungHwan Lee, Seo Hyun Yoon, Kyung-Sang Yu, In-Jin Jang, Joo-Youn Cho
Cytochrome P450 (CYP) 3A is an important drug-metabolizing enzyme in humans. Assessing CYP3A activity is necessary for predicting therapeutic outcomes or the potential adverse events of various therapeutics. This study sought to evaluate the distribution of endogenous and exogenous markers reflecting hepatic CYP3A activity and related factors affecting its activity in healthy male and female. Each subject was given a single 1 mg dose of midazolam intravenously. Pharmacokinetics, pharmacometabolomics, and pharmacogenomics analyses were performed to evaluate CYP3A activity...
July 2017: AAPS Journal
https://www.readbyqxmd.com/read/28505491/development-of-suitable-method-for-large-scale-urinary-glucocorticoid-analysis-by-liquid-chromatography-mass-spectrometry
#10
Akiko Matsumoto, Chisato Shimanoe, Keitaro Tanaka, Masayoshi Ichiba, Megumi Hara
Levels of urinary glucocorticoids and their concentration ratios have been analyzed as potential markers for various pathological statuses. Large-scale studies may possibly accelerate the investigations; however, a suitable method needs to be established. Analytical conditions for measurement of urinary glucocorticoids with LCMS were examined. Electrospray ionization in the positive ion mode was applied for detection of cortisol (precursor>product ion: 363.3>121.0), cortisol-d4 (internal standard, IS, 367...
July 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28499151/biphenyl-based-stationary-phases-for-improved-selectivity-in-complex-steroid-assays
#11
Johanna M Lindner, Michael Vogeser, Stefanie H Grimm
The measurement of steroid hormones and their corticoid precursors is an important aspect in endocrinology since these analytes are biomarkers for several endocrine disorders. Over the last few years, HPLC-MS/MS has become the method of choice to analyze these compounds. There are already several methods using stationary phases modified with C18 groups. However, since these columns sometimes do not enable sufficient separation of some isobaric steroids, we investigated the potential of a different RP modification using biphenyl groups for the separation of challenging isobars such as corticosterone, 11- and 21-deoxycortisol...
April 19, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28479316/reference-intervals-for-plasma-concentrations-of-adrenal-steroids-measured-by-lc-ms-ms-impact-of-gender-age-oral-contraceptives-body-mass-index-and-blood-pressure-status
#12
Graeme Eisenhofer, Mirko Peitzsch, Denise Kaden, Katharina Langton, Christina Pamporaki, Jimmy Masjkur, George Tsatsaronis, Anastasios Mangelis, Tracy A Williams, Martin Reincke, Jacques W M Lenders, Stefan R Bornstein
BACKGROUND: Mass spectrometric-based measurements of the steroid metabolome have been introduced to diagnose disorders featuring abnormal steroidogenesis. Defined reference intervals are important for interpreting such data. METHODS: Liquid chromatography-tandem mass spectrometry was used to establish reference intervals for 16 steroids (pregnenolone, progesterone, 11-deoxycorticosterone, corticosterone, aldosterone, 18-oxocortisol, 18-hydroxycortisol, 17-hydroxyprogesterone, 21-deoxycortisol, 11-deoxycortisol, cortisol, cortisone, dehydroepiandrosterone, dehydroepiandrosterone-sulfate, androstenedione, testosterone) measured in plasma from 525 volunteers with (n=227) and without (n=298) hypertension, including 68 women on oral contraceptives...
July 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28479185/neuroimaging-of-takayasu-arteritis-in-a-patient-with-ulcerative-rectocolitis
#13
Lucia Monti, Rosamaria Servillo, Irene Grazzini, Leila Khader, Maurizio Acampa, Alfonso Cerase
BACKGROUND: Takayasu arteritis (TA), also known as aortoarteritis and pulseless disease, is an autoimmune, idiopathic, large-vessel vasculitis that primarily affects the aorta and its major branches, the coronary arteries, and the pulmonary arteries. METHODS: This is a peculiar clinical and radiological pattern of TA in a young female Caucasian. Her medical history included diagnosis of ulcerative rectocolitis at the age of 14. Because of the occurrence of anemia and exacerbation of rectocolitis, she had started infliximab associated with low doses of cortisone and mesalazine...
May 4, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28461837/a-case-of-sweet-s-syndrome-secondary-to-myelodysplastic-syndrome-diagnostic-and-treatment-challenges
#14
Sfrijan Doinita, Visan Simina-Maria, Diaconu Bianca, Zurac Sabina, Scurtu Cristian
Sweet's Syndrome also knows as acute febrile neutrophilic dermatosis, is a rare skin's condition, that can occur either idiopathic or secondary. In the case of the latter, the syndrome can develop after certain malignancies (paraneoplastic syndrome), because of exposure to some medication or post infectious. It is more frequent in women aged between 30 and 50 years, but concerning children, the disorder is extremely rare (8% of the total number of cases), having equal sex ratio distribution. We present the case of an 11 year old male, diagnosed with systemic form of SS associated with Myelodysplastic Syndrome...
June 2016: Mædica
https://www.readbyqxmd.com/read/28457967/dhrs7-sdr34c1-a-new-player-in-the-regulation-of-androgen-receptor-function-by-inactivation-of-5%C3%AE-dihydrotestosterone
#15
Selene Araya, Denise V Kratschmar, Maria Tsachaki, Simon Stücheli, Katharina R Beck, Alex Odermatt
DHRS7 (SDR34C1) has been associated with potential tumor suppressor effects in prostate cancer; however, its function remains largely unknown. Recent experiments using purified recombinant human DHRS7 suggested several potential substrates, including the steroids cortisone and Δ4-androstene-3,17-dione (androstenedione). However, the substrate and cofactor concentrations used in these experiments were very high and the physiological relevance of these observations needed to be further investigated. In the present study, recombinant human DHRS7 was expressed in intact HEK-293 cells in order to investigate whether glucocorticoids and androgens serve as substrates at sub-micromolar concentrations and at physiological cofactor concentrations...
April 27, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28451456/immunosuppressive-treatment-in-fulminant-myocarditis-and-gene-expression-pattern-associated-with-but-no-histological-confirmation-of-giant-cell-myocarditis
#16
Friedrich Fruhwald, Dirk Lassner, Sonja Fruhwald, Ulrich M Gross, Otto Dapunt, Heinz-Peter Schultheiss
A healthy woman with acute onset of pulmonary oedema and severely depressed left ventricular function underwent endomyocardial biopsy under the clinical suspicion of fulminant myocarditis. While awaiting the results of biopsy, the situation deteriorated to Interagency Registry for Mechanically Assisted Circulatory Support (INTERMACS) and extracorporeal membrane oxygenation was implanted. Finally, immunohistochemistry in biopsy specimen corresponded to fulminant lymphocytic myocarditis, although active myocarditis was excluded...
May 2017: ESC Heart Failure
https://www.readbyqxmd.com/read/28435101/interaction-of-glucocorticoids-and-progesterone-derivatives-with-human-serum-albumin
#17
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
#18
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
#19
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
#20
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
keyword
keyword
5347
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"