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Dexamethasone suppression

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https://www.readbyqxmd.com/read/29162108/reduced-suppressive-effect-of-%C3%AE-2-adrenoceptor-agonist-on-fibrocyte-function-in-severe-asthma
#1
Chun-Yu Lo, Charalambos Michaeloudes, Pankaj K Bhavsar, Chien-Da Huang, Po-Jui Chang, Chun-Hua Wang, Han-Pin Kuo, Kian Fan Chung
BACKGROUND: Patients with severe asthma have increased airway remodelling and elevated numbers of circulating fibrocytes with enhanced myofibroblastic differentiation capacity, despite being treated with high doses of corticosteroids, and long acting β2-adrenergic receptor (AR) agonists (LABAs). We determined the effect of β2-AR agonists, alone or in combination with corticosteroids, on fibrocyte function. METHODS: Non-adherent non-T cells from peripheral blood mononuclear cells isolated from healthy subjects and patients with non-severe or severe asthma were treated with the β2-AR agonist, salmeterol, in the presence or absence of the corticosteroid dexamethasone...
November 21, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29159714/regulatory-effects-of-dexamethasone-on-nk-and-t-cell-immunity
#2
Liying Chen, Mikael Jondal, Konstantin Yakimchuk
Glucocorticoids (GCs) act via the intracellular glucocorticoid receptor (GR), which can regulate the expression of target genes. With regard to the immune system, GCs may affect both innate and adaptive immunity. Our study analyzed the immunoregulatory effects of dexamethasone (Dex) treatment on splenic T, Treg, NK and NKT cells by treating C57Bl6 mice with various doses of Dex. We observed that treatment with Dex decreased the number of NK cells in the spleen and suppressed their activity. In particular, the expression of both Ly49G and NKG2D receptors was decreased by Dex...
November 20, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/29157186/a-high-caloric-diet-rich-in-soy-oil-alleviates-oxidative-damage-of-skeletal-muscles-induced-by-dexamethasone-in-chickens
#3
Hongchao Jiao, Kaifeng Zhou, Jingpeng Zhao, Xiaojuan Wang, Hai Lin
Objective Glucocorticoids (GCs) can induce oxidative damage in skeletal muscles. The purpose of this study was to demonstrate a high caloric (HC) diet rich in soy oil would change the oxidative stress induced by a GC. Methods The effect of dexamethasone (DEX) and HC diet on oxidative stress in plasma, skeletal muscles (M. pectoralis major, PM; M. biceps femoris, BF), and mitochondria were determined. The biomarkers of oxidative damage and antioxidative enzyme activity were determined. The fatty acid profile of muscles and the activities of complex I and II in mitochondria were measured...
November 20, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/29152131/microrna-130b-attenuates-dexamethasone-induced-increase-of-lipid-accumulation-in-porcine-preadipocytes-by-suppressing-ppar-%C3%AE-expression
#4
Shifeng Pan, Yixin Cui, Xuan Dong, Tangjie Zhang, Hua Xing
In this study, two experiments were conducted to determine the role of miR-130b in dexamethasone (DEX)-induced lipid accumulation. Porcine preadipocytes were treated with 10(-6) M DEX for 48 h to investigate effects of DEX in lipid accumulation. Next, in order to illustrate the regulatory role of miR-130b on lipid accumulation induced by DEX, miRNA scrambled control (miR-SC), miR-130b overexpression plasmid and miR-130b inhibitor were respectively transfected into porcine preadipocytes at 24 h before DEX treatment for 48 h (miR-SC-DEX, miR-130b-DEX and miR-130b-inhibitor-DEX)...
October 20, 2017: Oncotarget
https://www.readbyqxmd.com/read/29151835/opuntia-humifusa-modulates-morphological-changes-characteristic-of-asthma-via-il-4-and-il-13-in-an-asthma-murine-model
#5
Soon-Young Lee, Chun-Sik Bae, Young-Hoon Choi, Nam-Sook Seo, Chang-Su Na, Jin-Cheol Yoo, Seung Sik Cho, Dae-Hun Park
Asthma is a chronic pulmonary disease that affects an estimated 235 million people worldwide, but asthma drugs have many adverse effects. Opuntia humifusa (eastern prickly pear) has been used as a food and traditional medicine worldwide; however, its anti-asthmatic effects have not been reported. We evaluated O. humifusa as a potential therapeutic or preventive component of anti-asthmatic drugs. We divided ovalbumin-sensitized mice into the following groups: normal control, asthma-induced control, dexamethasone-treated group (positive control), 50 mg/kg O...
2017: Food & Nutrition Research
https://www.readbyqxmd.com/read/29151238/predictability-of-hypoadrenalism-occurrence-and-duration-after-adrenalectomy-for-acth-independent-hypercortisolism
#6
V Morelli, L Minelli, C Eller-Vainicher, S Palmieri, E Cairoli, A Spada, M Arosio, I Chiodini
OBJECTIVE: To evaluate if the parameters of hypothalamic-pituitary-adrenal (HPA) axis activity could predict the occurrence and duration of post-surgical hypocortisolism (PSH) in patients with Cushing's syndrome (CS) and with adrenal incidentaloma (AI). METHODS: We studied 80 patients (54 females, age 53.3 ± 11 years), who underwent adrenalectomy for CS (17 patients) or for AI (53 patients). Before surgery, we measured adrenocorticotroph hormone (ACTH), urinary free cortisol (UFC) and serum cortisol after 1 mg dexamethasone suppression test (1 mg-DST) levels...
November 18, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/29144801/utility-of-a-single-late-night-plasma-cortisol-and-acth-for-the-diagnosis-of-cushing-s-syndrome
#7
Kush Dev Singh Jarial, Anil Bhansali, Kanchan K Mukherjee, Rimesh Pal, Akhilesh Sharma, Rakesh K Vashishtha, Suja P Sukumar, Naresh Sachdeva, Rama Walia
OBJECTIVE: To evaluate the diagnostic efficacy of various screening tests for the diagnosis of Cushing's syndrome (CS). METHODS: 35 patients of Cushing's syndrome and 16 patients of pseudo-Cushing's syndrome were enrolled. Assessment of 24h urinary free cortisol (UFC), late night salivary cortisol (LNSC), over night dexamethasone suppression test (ONDST), late night plasma cortisol (LNPC) and ACTH on outpatient basis, and during sleep as well as in awake state after 48 hours of hospital admission...
November 16, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/29123438/intravitreal-infliximab-injection-to-treat-experimental-endophthalmitis
#8
Osman Ondas, Orhan Ates, Sadullah Keles, Kenan Yildirim, Orhan Baykal, Selina Aksak Karamese, Murat Karamese, Hakan Uslu, Mustafa Yildirim, Muhammet Emin Naldan, Irem Ates
Objective: The purpose of this study was to compare the use of an intravitreal injection of infliximab and of dexamethasone combined with vancomycin to treat experimental endophthalmitis induced by Staphylococcus epidermidis. Materials and Methods: The study was conducted between March 25 and April 13, 2012. Twenty-five six-month-old healthy rabbits were used, each weighing 2.5-3 kg. The rabbits were randomized into five groups with five animals per group. Endophthalmitis was induced by 0...
October 2017: Eurasian Journal of Medicine
https://www.readbyqxmd.com/read/29116551/anti-inflammatory-effect-of-a-novel-locally-acting-a2a-receptor-agonist-in-a-rat-model-of-oxazolone-induced-colitis
#9
L Antonioli, A El-Tayeb, C Pellegrini, M Fornai, O Awwad, G Giustarini, G Natale, L Ryskalin, Z H Németh, C E Müller, C Blandizzi, R Colucci
Adenosine represents a powerful modulating factor, which has been shown to orchestrate the scope, duration, and remission of the inflammatory response through the activation of four specific receptors, classified as A1, A2A, A2B, and A3, all being widely expressed in a variety of immune cells. Several selective A2A receptor agonists have displayed anti-inflammatory effects, through the suppression of IL-12, TNF, and IFN-γ production by monocytes and lymphocytes, in the setting of chronic intestinal inflammation...
November 8, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/29115003/impact-of-hypercortisolism-on-skeletal-muscle-mass-and-adipose-tissue-mass-in-patients-with-adrenal-adenomas
#10
Danae A Delivanis, Nicole M Iñiguez-Ariza, Muhammad H Zeb, Michael R Moynagh, Naoki Takahashi, Travis J McKenzie, Melinda A Thomas, Charalambos Gogos, William F Young, Irina Bancos, Venetsana Kyriazopoulou
CONTEXT: Abdominal visceral adiposity and central sarcopenia are markers of increased cardiovascular risk and mortality. OBJECTIVE: To assess whether central sarcopenia and adiposity can serve as a marker of disease severity in patients with adrenal adenomas and glucocorticoid secretory autonomy. DESIGN: Retrospective cohort study. PATIENTS: Twenty-five patients with overt Cushing syndrome (CS), 48 patients with mild autonomous cortisol excess (MACE), and 32 patients with a non-functioning adrenal tumor (NFAT) were included...
November 8, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/29113297/long-non-coding-rna-profile-in-mantle-cell-lymphoma-identifies-a-functional-lncrna-ror1-as1-associated-with-ezh2-prc2-complex
#11
Guangzhen Hu, Shiv K Gupta, Tammy P Troska, Asha Nair, Mamta Gupta
Mantle cell lymphoma (MCL) is an aggressive B-cell lymphoma characterized by rapid disease progression. The needs for new therapeutic strategies for MCL patients call for further understanding on the molecular mechanisms of pathogenesis of MCL. Recently, long noncoding RNAs (lncRNAs) have been recognized as key regulators of gene expression and disease development, however, the role of lncRNAs in non-Hodgkin lymphoma and specifically in MCL is still unknown. Next generation RNA-sequencing was carried out on MCL patient samples along with normal controls and data was analyzed...
October 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/29112774/neuroactive-steroid-3%C3%AE-5%C3%AE-3-hydroxypregnan-20-one-3%C3%AE-5%C3%AE-thp-and-pro-inflammatory-cytokine-mcp-1-levels-in-hippocampus-ca1-are-correlated-with-voluntary-ethanol-consumption-in-cynomolgus-monkey
#12
Matthew C Beattie, Christopher S Reguyal, Patrizia Porcu, James B Daunais, Kathleen A Grant, A Leslie Morrow
BACKGROUND: Neuroactive steroids such as (3α,5α)3-hydroxypregnan-20-one (3α,5α-THP, allopregnanolone) are potent neuromodulators that enhance GABAergic neurotransmission and produce inhibitory neurobehavioral and anti-inflammatory effects. Chronic ethanol consumption reduces 3α,5α-THP levels in human plasma, but has brain-region and species-specific effects on CNS levels of 3α,5α-THP. We explored the relationship between 3α,5α-THP levels in the hippocampus and voluntary ethanol consumption in the cynomolgus monkey following daily self-administration of ethanol for 12 months and further examined the relationship to HPA axis function prior to ethanol exposure...
November 7, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/29109727/dexamethasone-and-monophosphoryl-lipid-a-induce-a-distinctive-profile-on-monocyte-derived-dendritic-cells-through-transcriptional-modulation-of-genes-associated-with-essential-processes-of-the-immune-response
#13
Paulina A García-González, Katina Schinnerling, Alejandro Sepúlveda-Gutiérrez, Jaxaira Maggi, Ahmed M Mehdi, Hendrik J Nel, Bárbara Pesce, Milton L Larrondo, Octavio Aravena, María C Molina, Diego Catalán, Ranjeny Thomas, Ricardo A Verdugo, Juan C Aguillón
There is growing interest in the use of tolerogenic dendritic cells (tolDCs) as a potential target for immunotherapy. However, the molecular bases that drive the differentiation of monocyte-derived DCs (moDCs) toward a tolerogenic state are still poorly understood. Here, we studied the transcriptional profile of moDCs from healthy subjects, modulated with dexamethasone (Dex) and activated with monophosphoryl lipid A (MPLA), referred to as Dex-modulated and MPLA-activated DCs (DM-DCs), as an approach to identify molecular regulators and pathways associated with the induction of tolerogenic properties in tolDCs...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29106702/hypothalamic-pituitary-adrenal-hpa-axis-suppression-after-treatment-with-glucocorticoid-therapy-for-childhood-acute-lymphoblastic-leukaemia
#14
REVIEW
Niki Rensen, Reinoud Jbj Gemke, Elvira C van Dalen, Joost Rotteveel, Gertjan Jl Kaspers
BACKGROUND: Glucocorticoids play a major role in the treatment of acute lymphoblastic leukaemia (ALL). However, supraphysiological doses can suppress the hypothalamic-pituitary-adrenal (HPA) axis. HPA axis suppression resulting in reduced cortisol response may cause an impaired stress response and an inadequate host defence against infection, which remain a cause of morbidity and death. Suppression commonly occurs in the first days after cessation of glucocorticoid therapy, but the exact duration is unclear...
November 6, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29106701/use-of-salivary-cortisol-and-cortisone-in-the-high-and-low-dose-synacthen-test
#15
Charlotte J Elder, Robert F Harrison, Alexandra S Cross, Ruben Vilela, Brian G Keevil, Neil P Wright, Richard J Ross
CONTEXT: Salivary cortisone reflects serum cortisol levels, is more sensitive than salivary cortisol at lower values of serum cortisol and is non-invasive. OBJECTIVE: To investigate the relationship between serum cortisol and salivary cortisol and cortisone following low and high-dose synacthen. DESIGN AND SETTING: Prospective pharmacodynamic studies in clinical research facilities. PARTICIPANTS AND INTERVENTION: 35 dexamethasone-suppressed, healthy adult males underwent an intravenous synacthen test: N=23 low-dose (1mcg), N=12 high-dose (250mcg)...
November 6, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/29095719/novel-and-preclinical-treatment-strategies-in-pneumococcal-meningitis
#16
Jan P Bewersdorf, Denis Grandgirard, Uwe Koedel, Stephen L Leib
PURPOSE OF REVIEW: Pneumococcal meningitis is the most frequent form of bacterial meningitis in Europe and the United States. Although early antimicrobial and adjuvant therapy with dexamethasone have helped to improve disease outcome in adults, mortality and morbidity rates remain unsatisfactorily high, emphasizing the need for additional treatment options. Promising targets for adjuvant therapy have been identified recently and will be the focus of this review. RECENT FINDINGS: Brain disease in pneumococcal meningitis is caused by direct bacterial toxicity and excessive meningeal inflammation...
November 1, 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/29094256/efficacy-of-dexamethasone-suppression-test-during-the-diagnosis-of-primary-pigmented-nodular-adrenocortical-disease-in-chinese-adrenocorticotropic-hormone-independent-cushing-syndrome
#17
Shi Chen, Ran Li, Lin Lu, Lian Duan, Xuebin Zhang, Anli Tong, Hui Pan, Huijuan Zhu, Zhaolin Lu
OBJECTIVE: To evaluate the cut-off value of the ratio of 24 h urinary free cortisol (24 h UFC) levels post-dexamethasone to prior-dexamethasone in dexamethasone suppression test (DST) during the diagnosis of primary pigmented nodular adrenocortical disease in Chinese adrenocorticotropic hormone-independent Cushing syndrome. DESIGN: Retrospective study. PARTICIPANTS: The patients diagnosed with primary pigmented nodular adrenocortical disease (PPNAD, n = 25), bilateral macronodular adrenal hyperplasia (BMAH, n = 27), and adrenocortical adenoma (ADA, n = 84) were admitted to the Peking Union Medical College Hospital from 2001 to 2016...
November 1, 2017: Endocrine
https://www.readbyqxmd.com/read/29091890/the-effect-of-clinically-relevant-doses-of-immunosuppressive-drugs-on-human-mesenchymal-stem-cells
#18
Eliska Javorkova, Julie Vackova, Michaela Hajkova, Barbora Hermankova, Alena Zajicova, Vladimir Holan, Magdalena Krulova
Immunosuppressive drugs are used to suppress graft rejection after transplantation and for the treatment of various diseases. The main limitations of their use in clinical settings are severe side effects, therefore alternative approaches are desirable. In this respect, mesenchymal stem cells (MSCs) possess a regenerative and immunomodulatory capacity that has generated considerable interest for their use in cell-based therapy. Currently, MSCs are tested in many clinical trials, including the treatment of diseases which require simultaneous immunosuppressive treatment...
October 27, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29091859/vitexin-inhibits-inflammation-in-murine-ovalbumin-induced-allergic-asthma
#19
Cláudio Luís Venturini, Antonio Macho, Karuppusamy Arunachalam, Danielle Ayr Tavares de Almeida, Suellen Iara Guirra Rosa, Eduarda Pavan, Sikiru Olaitan Balogun, Amílcar Sabino Damazo, Domingos Tabajara de Oliveira Martins
Vitexin is an important component of various medicinal plants frequently used to treat asthma, such as Crataegus spp., Vitex spp., Passiflora spp., and Echinodorus spp. However, there is no information about the vitexin potential as anti-asthmatic. The aim of the present work was to evaluate the anti-hypersensitive activity of vitexin in a murine ovalbumin (OVA)-induced allergic asthma model. Mice were sensitized to OVA by i.p. injection on days 1st and 10th, followed by a daily challenge with OVA using a nebulizer, from days 19th to 24th...
October 25, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29083535/dexamethasone-attenuates-methacholine-mediated-aquaporin-5-downregulation-in-human-nasal-epithelial-cells-via-suppression-of-nf-%C3%AE%C2%BAb-activation
#20
Yung-Lung Chang, Kai Ren Jian, Chun-Shu Lin, Hsing-Won Wang, Shao-Cheng Liu
BACKGROUND: Cholinergic stimulation plays a major role in inflammatory airway diseases. However, its role in airway surface liquid homeostasis and aquaporin 5 (AQP5) regulation remains unclear. In this study we sought to determine the effects of methacholine and dexamethasone on AQP5 expression in human nasal epithelial cells (HNEpC). METHODS: HNEpC were cultured with methacholine or dexamethasone at 4 concentrations in vitro. The subcellular distribution of AQP5 was explored using immunocytochemistry...
October 30, 2017: International Forum of Allergy & Rhinology
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