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Dexamethasone suppression

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https://www.readbyqxmd.com/read/28931176/the-role-of-cortisol-acth-ratio-for-screening-of-subclinical-hypercortisolism-in-patients-with-adrenal-incidentalomas
#1
Lele Li, Guoqing Yang, Jingtao Dou, Weijun Gu, Zhaohui Lv, Juming Lu, Yiming Mu
Introduction The cortisol/ACTH ratio was supposed to be helpful in the screening of subclinical hypercortisolism (SHC) in the published literatures. This study assessed the cortisol/ACTH ratio in patients with adrenal incidentaloma (AI) confirmed to have SHC and investigated its role for screening SCS in patients with AI. Methods This descriptive retrospective study included 183 patients with AIs [45 with SHC and 138 with non-functional adenoma (NFA)]. Cortisol and ACTH levels were measured at 8:00, 16:00, and 0:00, and the cortisol/ACTH ratio was calculated...
September 20, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28921750/successful-treatment-with-intrauterine-delivery-of-dexamethasone-for-repeated-implantation-failure
#2
Tao Zhang, Chunyu Huang, Yan Du, Ruochun Lian, Meilan Mo, Yong Zeng, Gil Mor
PROBLEM: Effective therapy for endometrial receptivity of patients with repeated embryo implantation failure (RIF) is far undeveloped. Whether intrauterine perfusion of dexamethasone (DXM), local administration of drugs with less systematic side-effects, benefit for embryo implantation by suppressing uterine NK (uNK) cells to improve endometrial receptivity remains unknown. METHOD OF STUDY: Women with RIF were analyzed for the correlation between the percentage of uNK cells during implantation window and following clinical pregnancy rate to determine the appropriate range of uNK for embryo implantation...
September 16, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28918747/omega-3-polyunsaturated-fatty-acids-eicosapentaenoic-acid-and-docosahexaenoic-acid-enhance-dexamethasone-sensitivity-in-multiple-myeloma-cells-by-the-p53-mir-34a-bcl-2-axis
#3
Xianping Dai, Mengshun Li, Feng Geng
Dexamethasone is widely used in multiple myeloma (MM) for its cytotoxic effects on lymphoid cells. However, many MM patients are resistant to dexamethasone, although some can benefit from dexamethasone treatment. In this study, we noted that ω-3 polyunsaturated fatty acids (PUFAs) enhanced the dexamethasone sensitivity of MM cells by inducing cell apoptosis. q-PCR analysis revealed that miR-34a could be significantly induced by PUFAs in U266 and primary MM cells. Transfection with miR-34a antagonist or miR-34a agomir could restore or suppress the dexamethasone sensitivity in U266 cells...
July 2017: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/28910955/-the-localization-diagnosis-of-patients-with-adrenocorticotropic-hormone-dependent-cushing-s-syndrome-in-adolescence
#4
S Chen, Z X Pan, L Lu, A L Tong, H Pan, H J Zhu, Y Yao, M Feng, R Z Wang, Z L Lu
Objective: To elucidate the clinical characteristics and localization diagnosis of patients with adrenocorticotropic hormone (ACTH)-dependent Cushing's syndrome (CS) in adolescence. Methods: The clinical data, laboratory examination and localization diagnosis from 35 patients aged less than 18 years old with adolescent CS who were treated at Peking Union Medical College Hospital between January 1990 and March 2012 were analyzed. Results: There were 29 cases of Cushing's disease (CD) and 6 cases of ectopic ACTH syndrome (EAS)...
September 12, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28905500/salidroside-suppressing-lps-induced-myocardial-injury-by-inhibiting-ros-mediated-pi3k-akt-mtor-pathway-in-vitro-and-in-vivo
#5
Lvyi Chen, Peng Liu, Xin Feng, Chunhua Ma
The purpose of the present study was to investigate the effect of salidroside (Sal) on myocardial injury in lipopolysaccharide (LPS)-induced endotoxemic in vitro and in vivo. SD rats were randomly divided into five groups: control group, LPS group (15 mg/kg), LPS plus dexamethasone (2 mg/kg), LPS plus Sal groups with different Sal doses (20, 40 mg/kg). Hemodynamic measurement and haematoxylin and eosin staining were performed. Serum levels of creatine kinase (CK), lactate dehydrogenase, the activities of the antioxidant enzymes catalase (CAT), superoxide dismutase (SOD), glutathione peroxidase (GSH-px), glutathione, tumour necrosis factor-α (TNF-α), interleukin-6 (IL-6), and interleukin-1β (IL-1β) were measured after the rats were killed...
September 14, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28887923/anti-adipogenesis-mechanism-of-pterostilbene-through-the-activation-of-heme-oxygenase-1-in-3t3-l1-cells
#6
Young-Jin Seo, Kui-Jin Kim, Eun-Jeong Koh, Jia Choi, Boo-Yong Lee
BACKGROUND: Pterostilbene is a stilbenoid and major compound and has diverse biological activities, such as antioxidant, anti-cancer, and anti-inflammatory. However, it has not been shown whether pterostilbene affects the mitotic clonal expansion during adipogenesis in 3T3-L1 cells. PURPOSE: In the present study, we aimed to demonstrate the detailed mechanism of pterostilbene on anti-adipogenesis in 3T3-L1 cells. METHODS: Preadipocytes were converted to adipocytes through treatment with MDI (IBMX; 3-isobutyl-1-methylxanthine, DEX; dexamethasone, insulin) in 3T3-L1 cells...
September 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28887710/increased-mortality-in-patients-with-adrenal-incidentalomas-and-autonomous-cortisol-secretion-a-13-year-retrospective-study-from-one-center
#7
Jekaterina Patrova, Magnus Kjellman, Hans Wahrenberg, Henrik Falhammar
PURPOSE: To compare long-term outcomes in patients with adrenal incidentalomas (AIs) with the response to a 1 mg overnight dexamethasone suppression test (DST). METHODS: Consecutive patients with "non-functional" AIs (n = 365) were examined. Patients with overt hormone excess, adrenocortical cancer and known malignancy had been excluded. Patients were classified to normal cortisol secretion group (n = 204, DST ≤ 50 nmol/l), possible autonomous cortisol secretion group (n = 128, DST 51-138 nmol/l) and autonomous cortisol secretion group (n = 33, DST ≥ 138 nmol/l)...
September 8, 2017: Endocrine
https://www.readbyqxmd.com/read/28886581/skullcapflavone-ii-attenuates-ovalbumin-induced-allergic-rhinitis-through-the-blocking-of-th2-cytokine-production-and-mast-cell-histamine-release
#8
Thi Tho Bui, Chun Hua Piao, Chang Ho Song, Ok Hee Chai
Allergic rhinitis is a common heterogeneous chronic upper airway disorder and is an IgE-mediated inflammation characterized by one or more nasal symptoms such as sneezing, itching, nasal discharge, rhinorrhea, post nasal drainage and nasal blockage. In the present study, the effects of skullcapflavone II (SCFII) on upper airway inflammation, Th2 cytokines, and NF-κB signaling in an ovalbumin (OVA)-induced allergic rhinitis (AR) murine model in vivo were investigated. OVA-induced AR mice increased nasal symptoms, eosinophils and mast cells infiltration into nasal cavity, OVA-specific IgE/IgG1 and histamine in serum, Th2 cytokines including IL-13 and GATA3, and NF-κB signaling in NALF and lung homogenate...
September 5, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28883496/overexpression-of-insig-2-inhibits-atypical-antipsychotic-induced-adipogenic-differentiation-and-lipid-biosynthesis-in-adipose-derived-stem-cells
#9
Chien-Chih Chen, Li-Wen Hsu, Kuang-Tzu Huang, Shigeru Goto, Chao-Long Chen, Toshiaki Nakano
Atypical antipsychotics (AAPs) are considered to possess superior efficacy for treating both the positive and negative symptoms of schizophrenia; however, AAP use often causes excessive weight gain and metabolic abnormalities. Recently, several reports have demonstrated that AAPs activate sterol regulatory element-binding protein (SREBP). SREBP, SREBP cleavage-activating protein (SCAP) and insulin-induced gene (Insig) regulate downstream cholesterol and fatty acid biosynthesis. In this study, we explored the effects of clozapine, olanzapine and risperidone on SREBP signaling and downstream lipid biosynthesis genes in the early events of adipogenic differentiation in adipose-derived stem cells (ASCs)...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28877980/nad-metabolism-fuels-human-and-mouse-intestinal-inflammation
#10
Romana R Gerner, Victoria Klepsch, Sophie Macheiner, Kathrin Arnhard, Timon E Adolph, Christoph Grander, Verena Wieser, Alexandra Pfister, Patrizia Moser, Natascha Hermann-Kleiter, Gottfried Baier, Herbert Oberacher, Herbert Tilg, Alexander R Moschen
OBJECTIVE: Nicotinamide phosphoribosyltransferase (NAMPT, also referred to as pre-B cell colony-enhancing factor or visfatin) is critically required for the maintenance of cellular nicotinamide adenine dinucleotide (NAD) supply catalysing the rate-limiting step of the NAD salvage pathway. NAMPT is strongly upregulated in inflammation including IBD and counteracts an increased cellular NAD turnover mediated by NAD-depleting enzymes. These constitute an important mechanistic link between inflammatory, metabolic and transcriptional pathways and NAD metabolism...
September 6, 2017: Gut
https://www.readbyqxmd.com/read/28871136/small-molecule-t63-suppresses-osteoporosis-by-modulating-osteoblast-differentiation-via-bmp-and-wnt-signaling-pathways
#11
Xiao-Li Zhao, Jin-Jing Chen, Guo-Ning Zhang, Yu-Cheng Wang, Shu-Yi Si, Lin-Feng Chen, Zhen Wang
Osteoporosis results from the imbalance between bone resorption and bone formation, and restoring the normal balance of bone remodeling is highly desirable for identification of better treatment. In this study, using a cell-based high-throughput screening model representing Runt-related transcription factor 2 (RUNX2) transcriptional activity, we identified a novel small-molecular-weight compound, T63, as an efficient up-regulator of osteogenesis. T63 increased the alkaline phosphatase (ALPL) activity and mineralization as well as gene expression of Alpl and other osteogenic marker genes in mouse osteoblasts and mesenchymal stem cell-like cells...
September 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28870984/optimal-follow-up-strategies-for-adrenal-incidentalomas-reappraisal-of-the-2016-ese-ensat-guidelines-in-real-clinical-practice
#12
A Ram Hong, Jung Hee Kim, Kyeong Seon Park, Kyong Young Kim, Ji Hyun Lee, Sung Hye Kong, Seo Young Lee, Chan Soo Shin, Sang Wan Kim, Seong-Yeon Kim
OBJECTIVE: Recently, the European Society of Endocrinology (ESE), in collaboration with the European Network for the Study of Adrenal Tumors (ENSAT), asserted that adrenal incidentalomas (AIs) <4 cm and ≤10 Hounsfield units (HU) do not require further follow-up imaging. In order to validate the clinical application of the follow-up strategies suggested by the 2016 ESE-ENSAT guidelines, we explored the clinical characteristics and natural course of AIs in a single center over 13 years...
September 4, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28865040/the-impact-of-peri-operative-dexamethasone-administration-on-the-normal-hypothalamic-pituitary-adrenal-response-to-major-surgical-procedures
#13
Katia El-Sibai, Aman Rajpal, Ribal Al-Aridi, Warren R Selman, Baha M Arafah
BACKGROUND: Surgical procedures are associated with activation of the hypothalamic-pituitary-adrenal axis (HPA). Studies examining HPA dynamics peri-operatively are limited and the modulating influence of peri-operatively administered glucocorticoids on that is not well established. This investigation examined alterations in HPA function and the impact of dexamethasone (DEX) administration during the peri-operative period. METHODS: We examined HPA function in 297 patients with normal function who had surgical procedures including pituitary mass resection (n = 191), craniotomy (n = 17) and other thoracic/ abdominal/ pelvic surgeries (n = 89)...
September 1, 2017: Endocrine
https://www.readbyqxmd.com/read/28863004/dexamethasone-impairs-encoding-and-expression-of-aversive-conditioning-promoted-by-pentylenetetrazole
#14
Juliana Cavalli, Alexandre A Hoeller, Silvia Dal Bó, Leandro J Bertoglio, Thereza C M de Lima, Antonio P Carobrez
Behavioral and neuroendocrine responses following threatening situations promote the release of corticosterone, which is known to modulate trauma-related learning and memory process. However, it remains unknown whether the aversive learning generated by interoceptive fear conditioning is affected by glucocorticoid modulation. Therefore, the present study aimed to investigate the role of dexamethasone suppression in encoding and expression of pentylenetetrazole-induced olfactory fear conditioning (OFC) and in contextual second-order conditioning promoted by the conditioned odor...
August 31, 2017: Behavioural Pharmacology
https://www.readbyqxmd.com/read/28862247/ectopic-adrenocorticotropic-hormone-syndrome-in-a-case-of-duodenal-neuroendocrine-tumor-presenting-with-liver-metastasis
#15
J Khare, S Daga, S Nalla, P Deb
Ectopic adrenocorticotropic hormone (ACTH) syndrome is an uncommon disorder and comprises about 15% of all patients with Cushing's syndrome (CS). Duodenal carcinoids are rare, indolent tumors usually associated with a benign progression. We hereby report a rare case of CS resulting from ectopic ACTH secretion from a duodenal neuroendocrine tumor (NET) presenting with liver metastasis. A 37-year-old female presented with abdominal discomfort and dyspepsia of 1-month duration. Ultrasound abdomen suggested a well-defined hypoechoic lesion in the left lobe of the liver, suggestive of neoplasia...
August 31, 2017: Journal of Postgraduate Medicine
https://www.readbyqxmd.com/read/28858511/anchimerically-activated-protides-as-inhibitors-of-cap-dependent-translation-and-inducers-of-chemosensitization-in-mantle-cell-lymphoma
#16
Aniekan Okon, JingJing Han, Surendra Dawadi, Christos Demosthenous, Courtney C Aldrich, Mamta Gupta, Carston R Wagner
The cellular delivery of nucleotides through various pronucleotide strategies has expanded the utility of nucleosides as a therapeutic class. Although highly successful, the highly popular ProTide system relies on a four-step enzymatic and chemical process to liberate the corresponding monophosphate. To broaden the scope and reduce the number of steps required for monophosphate release, we have developed a strategy that depends on initial chemical activation by a sulfur atom of a methylthioalkyl protecting group, followed by enzymatic hydrolysis of the resulting phosphoramidate monoester...
September 20, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28838299/peculiarities-of-feline-hyperadrenocorticism-update-on-diagnosis-and-treatment
#17
Lara A Boland, Vanessa R Barrs
Practical relevance: Hyperadrenocorticism (HAC) is a relatively uncommon endocrinopathy of older cats, with a mean age at diagnosis of 10 years. In addition to pituitary-dependent and adrenal-dependent hypercortisolism, clinical signs of HAC can result from adrenal sex steroid-producing tumours. Clinical challenges: While HAC in cats has many similarities to canine HAC, there are key differences in presentation, diagnosis and response to therapy. Most, but not all, cats with HAC have concurrent diabetes mellitus, which is often insulin resistant...
September 2017: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/28836295/microglia-may-compensate-for-dopaminergic-neuron-loss-in-experimental-parkinsonism-through-selective-elimination-of-glutamatergic-synapses-from-the-subthalamic-nucleus
#18
Hitomi Aono, Mohammed Emamussalehin Choudhury, Hiromi Higaki, Kazuya Miyanishi, Yuka Kigami, Kohdai Fujita, Jun-Ichi Akiyama, Hisaaki Takahashi, Hajime Yano, Madoka Kubo, Noriko Nishikawa, Masahiro Nomoto, Junya Tanaka
Parkinson's disease (PD) symptoms do not become apparent until most dopaminergic neurons in the substantia nigra pars compacta (SNc) degenerate, suggesting that compensatory mechanisms play a role. Here, we investigated the compensatory involvement of activated microglia in the SN pars reticulata (SNr) and the globus pallidus (GP) in a 6-hydroxydopamine-induced rat hemiparkinsonism model. Activated microglia accumulated more markedly in the SNr than in the SNc in the model. The cells had enlarged somata and expressed phagocytic markers CD68 and NG2 proteoglycan in a limited region of the SNr, where synapsin I- and postsynaptic density 95-immunoreactivities were reduced...
August 24, 2017: Glia
https://www.readbyqxmd.com/read/28830942/diabetes-exacerbates-infection-via-hyperinflammation-by-signaling-through-tlr4-and-rage
#19
Travis B Nielsen, Paul Pantapalangkoor, Jun Yan, Brian M Luna, Ken Dekitani, Kevin Bruhn, Brandon Tan, Justin Junus, Robert A Bonomo, Ann Marie Schmidt, Michael Everson, Frederick Duncanson, Terence M Doherty, Lin Lin, Brad Spellberg
For more than a century, diabetic patients have been considered immunosuppressed due to defects in phagocytosis and microbial killing. We confirmed that diabetic mice were hypersusceptible to bacteremia caused by Gram-negative bacteria (GNB), dying at inocula nonlethal to nondiabetic mice. Contrary to the pervasive paradigm that diabetes impedes phagocytic function, the bacterial burden was no greater in diabetic mice despite excess mortality. However, diabetic mice did exhibit dramatically increased levels of proinflammatory cytokines in response to GNB infections, and immunosuppressing these cytokines with dexamethasone restored their resistance to infection, both of which are consistent with excess inflammation...
August 22, 2017: MBio
https://www.readbyqxmd.com/read/28819359/screening-for-cushing-syndrome-at-the-primary-care-level-what-every-general-practitioner-must-know
#20
REVIEW
Ernest Yorke, Yacoba Atiase, Josephine Akpalu, Osei Sarfo-Kantanka
Cushing's syndrome is a rare entity, and a high index of suspicion is needed for screening in a primary care setting. The clinical awareness of the primary care physician (PCP) to the highly indicative signs and symptoms such as facial plethora, proximal myopathy, reddish purple striae, and easy bruisability should alert him to look for biochemical evidence of Cushing's syndrome through any of the first-line screening tests, namely, 24-hour urinary free cortisol, overnight dexamethasone suppression test, or late-night salivary cortisol...
2017: International Journal of Endocrinology
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