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https://www.readbyqxmd.com/read/28650975/defective-glucocorticoid-receptor-signaling-and-keratinocyte-autonomous-defects-contribute-to-skin-phenotype-of-mouse-embryos-lacking-the-hsp90-co-chaperone-p23
#1
Marta Madon-Simon, Iwona Grad, Pilar Bayo, Paloma Pérez, Didier Picard
p23 is a small acidic protein with intrinsic molecular chaperone activity. It is best known as a co-chaperone of the major cytosolic molecular chaperone Hsp90. p23 binds the N-terminus of Hsp90 and stabilizes the ATP-bound and N-terminally closed Hsp90 dimer. It is in this configuration that many Hsp90 clients are most stably bound. Considering the important role of p23 in the Hsp90 cycle, it came as a surprise that it is not absolutely essential for viability in the budding yeast or for mouse development. Mice without p23 develop quite normally until birth and then all die perinatally because of immature lungs...
2017: PloS One
https://www.readbyqxmd.com/read/28650457/fibroblast-growth-factor-19-regulates-skeletal-muscle-mass-and-ameliorates-muscle-wasting-in-mice
#2
Bérengère Benoit, Emmanuelle Meugnier, Martina Castelli, Stéphanie Chanon, Aurélie Vieille-Marchiset, Christine Durand, Nadia Bendridi, Sandra Pesenti, Pierre-Axel Monternier, Anne-Cécile Durieux, Damien Freyssenet, Jennifer Rieusset, Etienne Lefai, Hubert Vidal, Jérôme Ruzzin
The endocrine-derived hormone fibroblast growth factor (FGF) 19 has recently emerged as a potential target for treating metabolic disease. Given that skeletal muscle is a key metabolic organ, we explored the role of FGF19 in that tissue. Here we report a novel function of FGF19 in regulating skeletal muscle mass through enlargement of muscle fiber size, and in protecting muscle from atrophy. Treatment with FGF19 causes skeletal muscle hypertrophy in mice, while physiological and pharmacological doses of FGF19 substantially increase the size of human myotubes in vitro...
June 26, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28649452/glucocorticoid-receptor-expression-on-circulating-leukocytes-differs-between-healthy-male-and-female-adults
#3
Kim D Lu, Shlomit Radom-Aizik, Fadia Haddad, Frank Zaldivar, Monica Kraft, Dan M Cooper
INTRODUCTION: The glucocorticoid receptor (GR) is a key receptor involved in inflammatory responses and is influenced by sex steroids. This study measured GR expression on circulating leukocyte subtypes in males and females. METHODS: A total of 23 healthy adults (12 female) participated in this study. GR expression was measured in leukocyte subtypes using flow cytometry. Peripheral blood mononuclear cell (PBMC) gene expression of GR (NR3C1), GR β, TGF-β1 and 2, and glucocorticoid-induced leucine zipper (GILZ) were determined by real-time polymerase chain reaction...
April 2017: Journal of clinical and translational science
https://www.readbyqxmd.com/read/28649380/gitr-ligand-fusion-protein-agonist-enhances-the-tumor-antigen-specific-cd8-t-cell-response-and-leads-to-long-lasting-memory
#4
Nick M Durham, Nick Holoweckyj, Randall S MacGill, Kelly McGlinchey, Ching Ching Leow, Scott H Robbins
BACKGROUND: The expansion of antigen-specific CD8 T cells is important in generating an effective and long-lasting immune response to tumors and viruses. Glucocorticoid-induced tumor necrosis factor receptor family-related receptor (GITR) is a co-stimulatory receptor that binds the GITR ligand (GITRL). Agonism of GITR can produce important signals that drive expansion of effector T cell populations. METHODS: We explored two separate murine tumor models, CT26 and TC-1, for responsiveness to GITR Ligand Fusion Protein(GITRL-FP) monotherapy...
2017: Journal for Immunotherapy of Cancer
https://www.readbyqxmd.com/read/28649323/individual-based-analysis-of-hair-corticosterone-reveals-factors-influencing-chronic-stress-in-the-american-pika
#5
Matthew D Waterhouse, Bryson Sjodin, Chris Ray, Liesl Erb, Jennifer Wilkening, Michael A Russello
Glucocorticoids are often measured in wildlife to assess physiological responses to environmental or ecological stress. Hair, blood, saliva, or fecal samples are generally used depending on the timescale of the stress response being investigated and species-specific considerations. Here, we report the first use of hair samples to measure long-term corticosterone levels in the climate-sensitive American pika (Ochotona princeps). We validated an immunoassay-based measurement of corticosterone extracted from hair samples and compared corticosterone estimates obtained from plasma, hair, and fecal samples of nine pikas...
June 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28648630/resolution-of-a-steroid-resistant-hypereosinophilic-immune-diathesis-with-mepolizumab-and-concomitant-amelioration-of-a-mixed-thrombotic-microangiopathy
#6
J Justin Mulvey, Cynthia Magro, Amy Chadburn
The anaphylatoxins produced by an unbridled complement cascade in atypical hemolytic uremic syndrome (aHUS) can alter the leukocyte environment in tissues and peripheral blood, causing clinically significant eosinophilia. While the membrane attack complex and C5a anaphlatoxin can be suppressed with anti-C5 biologics, the production of C3a is still capable of driving a destructive hypereosinophilic syndrome in spite of anticomplement therapy. The side-effects of glucocorticoids in treating hypereosinophilic syndrome limit their therapeutic index in long-term treatment and this behooves the use of alternative strategies...
May 2, 2017: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/28647675/abstinence-from-prolonged-ethanol-exposure-affects-plasma-corticosterone-glucocorticoid-receptor-signaling-and-stress-related-behaviors
#7
Sucharita S Somkuwar, Leandro F Vendruscolo, McKenzie J Fannon, Brooke E Schmeichel, Tran Bao Nguyen, Jasmin Guevara, Harpreet Sidhu, Candice Contet, Eric P Zorrilla, Chitra D Mandyam
Alcohol dependence is linked to dysregulation of the hypothalamic-pituitary-adrenal axis. Here, we investigated effects of repeated ethanol intoxication-withdrawal cycles (using chronic intermittent ethanol vapor inhalation; CIE) and abstinence from CIE on peak and nadir plasma corticosterone (CORT) levels. Irritability- and anxiety-like behaviors as well as glucocorticoid receptors (GR) in the medial prefrontal cortex (mPFC) were assessed at various intervals (2h-28d) after cessation of CIE. Results show that peak CORT increased during CIE, transiently decreased during early abstinence (1-11d), and returned to pre-abstinence levels during protracted abstinence (17-27d)...
June 12, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28647673/constitutive-differences-in-glucocorticoid-responsiveness-to-stress-are-related-to-variation-in-aggression-and-anxiety-related-behaviors
#8
Sophie E Walker, Olivia Zanoletti, Isabelle Guillot de Suduiraut, Carmen Sandi
Glucocorticoids coordinate responses that enable an individual to cope with stressful challenges and, additionally, mediate adaptation following cessation of a stressor. There are important individual differences in the magnitude of glucocorticoid responsiveness to stressors. However, whether individual differences in glucocorticoid responsiveness to stress are linked to different behavioral strategies in coping with social and non-social challenges is not easily studied, owing to the lack of appropriate animal models...
June 16, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28647094/long-term-prognosis-of-hematogenous-vertebral-osteomyelitis-mortality-quality-of-life-and-pain
#9
Terufumi Kokabu, Masahiko Takahata, Nobuhisa Ishiguro, Norimasa Iwasaki
BACKGROUND: Hematogenous vertebral osteomyelitis (HVO) has a generally favorable prognosis if appropriate treatment is initiated in its early phase; however, some intractable cases with HVO can develop neurological impairment as well as spinal deformity during the course of treatment and these sequelae may lead to impaired quality of life (QOL). In this study, we aimed to evaluate the long-term relapse rate, mortality, and QOL of patients with HVO. METHODS: In this retrospective case series study, medical records of 60 patients with HVO with a mean follow-up period of 8 years (5-23 years) were reviewed to assess demographic data, details of infection, and clinical course...
June 21, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28646191/prednisolone-induces-apoptosis-in-corneal-epithelial-cells-through-the-intrinsic-pathway
#10
Jin Suk Ryu, Jung Hwa Ko, Mee Kum Kim, Won Ryang Wee, Joo Youn Oh
Glucocorticoid eye drops are one of the most widely used medications in ophthalmology. However, little is known about the effects of glucocorticoids on corneal epithelial cells that are directly exposed to topically-administered glucocorticoids. Here we investigated the effects of prednisolone, a synthetic glucocorticoid analogue frequently used in the clinic, on corneal epithelial cells. Results showed that prednisolone decreased survival of corneal epithelial cells by inhibiting proliferation and inducing apoptosis in a dose-dependent manner...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28646163/aldosterone-modulates-the-association-between-ncc-and-enac
#11
Brandi M Wynne, Abinash C Mistry, Otor Al-Khalili, Rickta Mallick, Franziska Theilig, Douglas C Eaton, Robert S Hoover
Distal sodium transport is a final step in the regulation of blood pressure. As such, understanding how the two main sodium transport proteins, the thiazide-sensitive sodium chloride cotransporter (NCC) and the epithelial sodium channel (ENaC), are regulated is paramount. Both are expressed in the late distal nephron; however, no evidence has suggested that these two sodium transport proteins interact. Recently, we established that these two sodium transport proteins functionally interact in the second part of the distal nephron (DCT2)...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28645880/biomarkers-of-airway-and-systemic-inflammation-in-obese-asthmatic-paediatric-patients
#12
H T Nacaroglu, O B Gayret, M Erol, O Buke, O Zengi, M Tasdemir, Z Tasdemir, O Yigit
BACKGROUND: It is thought that airway inflammation is more common in obese asthmatic patients because inflammation is harder to control and does not respond well to glucocorticoid treatment. OBJECTIVE: This study's aim was to investigate the effect of obesity on airway and systemic inflammation in children with asthma and to identify the biomarkers that play a role in this inflammation. METHODS: The study included patients aged 6-16 years who were diagnosed with asthma in the paediatric allergy outpatient clinic of Bagcilar Training and Research Hospital in Turkey...
June 20, 2017: Allergologia et Immunopathologia
https://www.readbyqxmd.com/read/28645352/r%C3%A3-sistances-aux-hormones-st%C3%A3-ro%C3%A3-des-physiologie-et-pathologie-pathophysiology-of-steroid-resistance-syndrome
#13
N Ramos, M Lombès
Steroid resistance syndrome (mineralocorticoids, glucocorticoids, estrogens, androgens) is a rare clinical disorder, androgen insensitivity syndrome being the most commonly described. Resistance syndromes are characterized by elevated steroid hormone levels, secondary to an impaired signal transduction and a lack of negative feedback, without any specific clinical signs of steroid excess. In most cases, steroid hormone resistance is generally caused by steroid receptor mutations. Several nonsense and missense mutations or deletions have already been described for all steroid receptors, except for the progesterone receptor...
October 2016: Annales D'endocrinologie
https://www.readbyqxmd.com/read/28645253/a-case-report-of-thoracolumbar-paraspinal-myopathy-as-the-cause-of-camptocormia-in-a-patient-with-atypical-parkinsonism
#14
Yoon Kim, Ahro Kim, Aryun Kim, Beomseok Jeon
BACKGROUND: Camptocormia is severe flexion of the thoracolumbar spine, exaggerated during standing and walking but minimized in supine position. Even though camptocormia is a relatively common condition during the course of Parkinson's disease, there is ongoing controversy concerning its mechanisms. The most widely accepted and yet still disputed one is dystonia. However, based on myopathic changes observed in the paraspinal muscle biopsies of some PD patients with camptocormia, the attempt to attribute camptocormia to myopathy has continued...
June 23, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28645097/raman-spectroscopy-differentiates-between-sensitive-and-resistant-multiple-myeloma-cell-lines
#15
Domenico Franco, Sebastiano Trusso, Enza Fazio, Alessandro Allegra, Caterina Musolino, Antonio Speciale, Francesco Cimino, Antonella Saija, Fortunato Neri, Marco S Nicolò, Salvatore P P Guglielmino
Current methods for identifying neoplastic cells and discerning them from their normal counterparts are often nonspecific and biologically perturbing. Here, we show that single-cell micro-Raman spectroscopy can be used to discriminate between resistant and sensitive multiple myeloma cell lines based on their highly reproducible biomolecular spectral signatures. In order to demonstrate robustness of the proposed approach, we used two different cell lines of multiple myeloma, namely MM.1S and U266B1, and their counterparts MM...
June 15, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28644985/depressive-like-behavior-is-elevated-among-offspring-of-parents-exposed-to-dim-light-at-night-prior-to-mating
#16
Yasmine M Cissé, Kathryn L G Russart, Randy J Nelson
Rates of major depressive disorder (MDD) have steadily increased over the past 50 years. Many factors have been implicated in the etiology of depressive disorders and environmental influences are being increasingly recognized. The increase in depression rates has coincided with increased artificial nighttime lighting. Exposure to light at night (LAN) has been associated with increased depressive-like behavior in rodents and decreased mood in humans. However, relatively little is known on the multigenerational effects of dLAN on affect...
June 12, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28641635/-application-of-mir-182-for-determination-of-glucocorticoid-resistant-patients-with-lymphoid-malignancy
#17
Ying-Wei Hu, Shi-Yu Chen, Yan-Hui Xie
OBJECTIVE: To validate the clinical relationship between miR-182 and glucocorticoid-resistance in patients with lymphoid malignancy. METHODS: Real-time quantitative PCR(qRT-PCR) was employed to detect the expression of miR-182 in lymphoma patients (68 cases, the specimens indluded bone marrow of 20 cases, and plasma of 48 cases), multiple myeloma patients (24 cases, the specimens included bone marrow of 14 cases and plasma of 10 cases), ALL patients (3 cases, specimen was plasma of 3 cases) and non-lymphotic system disorder patients (18 cases, specimens included bone marrow of 8 cases and plasma of 10 cases)...
June 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28641541/-stress-is-80-years-old-from-hans-selye-original-paper-in-1936-to-recent-advances-in-gi-ulceration
#18
Sandor Szabo, Masashi Yoshida, Janos Filakovszky, Gyorgy Juhasz
The first scientific publication on 'general adaption syndrome', or as we know today 'biologic stress' has been published in Nature in 1936 by the 29-year old Hans Selye. His results in that short publication that contained no references or illustrations, were based on experiments in rats that were exposed to severe insults/stressors, but his idea about a 'nonspecific bodily response' originated from his observations of sick patients whom he had seen as a medical students and young clinician. Autopsy of stressed rats revealed three major, grossly visible changes: hyperemia and enlargement of the adrenals, atrophy of the thymus and lymph nodes as well as hemorrhagic gastric erosions/ulcers (the "stress triad")...
June 22, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28641498/glucocorticoid-receptor-genetic-variants-and-response-to-fluoxetine-in-major-depressive-disorder
#19
Hasti Nouraei, Negar Firouzabadi, Ali Mandegary, Kamiar Zomorrodian, Ehsan Bahramali, Mohammad Reza Hooshangi Shayesteh, Saham Ansari
Hyperactivity of the hypothalamic pituitary adrenocortical (HPA) axis is one of the main clinical findings in depression. The HPA axis is interrelated with glucocorticoid signaling via glucocorticoid receptors (GCRs). Thus, functional genetic variants on GCRs might influence therapeutic outcomes in depression. The aim of the present study was to investigate the association between three functional polymorphisms (rs41423247, rs6195, and rs6189/rs6190) on GCR and response to fluoxetine in a group of depressed patients...
June 23, 2017: Journal of Neuropsychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/28641158/determinants-of-cortisol-during-pregnancy-the-abcd-cohort
#20
Laura S Bleker, Tessa J Roseboom, Tanja G Vrijkotte, Rebecca M Reynolds, Susanne R de Rooij
BACKGROUND: Psychosocial stress during pregnancy has been proposed as a major contributor of glucocorticoid-mediated programming of the fetal hypothalamic-pituitary adrenal (HPA) axis, with later adverse health consequences. However, evidence linking maternal stress to maternal cortisol values during pregnancy is inconclusive. A possible explanation for this is that other maternal factors overshadow any potential effects of stress on cortisol levels. We studied a large cohort of pregnant women with extensive data on pregnancy characteristics to determine the respective contributions of biological, environmental and psychosocial stress factors to cortisol levels in pregnancy...
May 31, 2017: Psychoneuroendocrinology
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