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https://www.readbyqxmd.com/read/28236656/recovery-from-desensitization-of-ige-dependent-responses-in-human-lung-mast-cells
#1
Amy Lewis, Donald W MacGlashan, S Kim Suvarna, Peter T Peachell
BACKGROUND: Clinical desensitization and oral food immunotherapy are therapeutic interventions that allow individuals who react adversely to an allergen (drug or food) to be made tolerant to the allergen. However, tolerance is brief and allergen hypersensitivity can recur within days following allergen withdrawal. OBJECTIVE: We hypothesize that the reason these treatments are temporary reflects rapid recovery of mast cells from a desensitized state. We sought to test this...
February 25, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28229039/clofarabine-desensitization-a-case-report-leukemia-research-reports
#2
Sarah M Hayes, Justin A Wasko, Erica Dahl Warlick
We describe a relapsed AML patient who had two prior severe reactions to clofarabine involving rigors, emesis, tachycardia, hypotension, and acute kidney injury. Given previous prolonged remission achieved with clofarabine and cytarabine therapy years prior, rechallenge was undertaken upon discovery of AML relapse. We designed a desensitization protocol performed with the first dose of clofarabine, leading to successful administration of the entire clofarabine/cytarabine treatment course. From this case we show promise for clofarabine rechallenge after prior hypersensitivity reactions in patients with few treatment options for relapsed AML...
2017: Leukemia Research Reports
https://www.readbyqxmd.com/read/28228552/core-engagement-with-%C3%AE-arrestin-is-dispensable-for-agonist-induced-vasopressin-receptor-endocytosis-and-erk-activation
#3
Punita Kumari, Ashish Srivastava, Eshan Ghosh, Ravi Ranjan, Shalini Dogra, Prem N Yadav, Arun K Shukla
G Protein-Coupled Receptors (GPCRs) exhibit highly conserved activation and signaling mechanisms where agonist stimulation leads to coupling of heterotrimeric G proteins and generation of second messenger response. This is followed by receptor phosphorylation, primarily in the carboxyl-terminus but also in the cytoplasmic loops, and subsequent binding of arrestins. GPCRs typically recruit arrestins through two different set of interactions, one involving phosphorylated receptor tail and the other mediated by the receptor core...
February 22, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28227034/a-novel-algorithm-for-reducing-false-arrhythmia-alarms-in-intensive-care-units
#4
Chandan Srivastava, Sonal Sharma, Ali Jalali, Chandan Srivastava, Sonal Sharma, Ali Jalali, Ali Jalali, Chandan Srivastava, Sonal Sharma
Alarm fatigue in intensive care units (ICU) is one of the top healthcare issues in the US. False alarms in ICU will decrease the quality of care and staff response time over the alarms. Normally, false alarm will cause desensitization of the clinical staff which leads to warnings and misleading, if the triggered alarm is true. In this study, we have proposed a multi-model ensemble approach to reduce the false alarm rate in monitoring systems. We have used 750 patient records from PhysioNet database. At First arrhythmia based features from electrocardiogram (ECG), arterial blood pressure (ABP) and photoplethysmogram (PPG) features were extracted from the records...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226319/oral-and-sublingual-immunotherapy-potential-causes-for-eosinophilic-gastrointestinal-disorders
#5
Delara Babaie, Mehrnaz Mesdaghi, Makoto Nishino, Mahboubeh Mansouri, Motohiro Ebisawa
Food allergy is a common health problem worldwide, with increasing prevalence during recent decades. The only approved treatments for food allergy are food avoidance and administration of emergency medications in case of accidental exposure, which negatively affects patients' quality of life, so new treatments are highly desirable. Different food immunotherapy modalities have recently been used, with variable success rates in the induction of desensitization and tolerance, and different numbers and types of adverse reactions...
February 23, 2017: International Archives of Allergy and Immunology
https://www.readbyqxmd.com/read/28224143/ara-h-2-cross-linking-catalyzed-by-mtgase-decreases-its-allergenicity
#6
Zhihua Wu, Jun Lian, Ruifang Zhao, Kun Li, Xin Li, Anshu Yang, Ping Tong, Hongbing Chen
Peanuts, whose major allergen is Ara h 2, are included among the eight major food allergens. After reduction using dithiothreitol (DTT), cross-linking of Ara h 2 could be catalyzed by microbial transglutaminase (MTGase), a widely used enzyme in the food industry. In this study, Ara h 2 cross-linking was catalyzed by MTGase after it was reduced by DTT. Using mass spectrometry and PLINK software, five cross-linkers were identified, and five linear allergen epitopes were found to be involved in the reactions. The IgE binding capacity of cross-linked Ara h 2 was found to be significantly lower compared to that of native and reduced Ara h 2...
February 22, 2017: Food & Function
https://www.readbyqxmd.com/read/28223524/distinct-conformations-of-gpcr-%C3%AE-arrestin-complexes-mediate-desensitization-signaling-and-endocytosis
#7
Thomas J Cahill, Alex R B Thomsen, Jeffrey T Tarrasch, Bianca Plouffe, Anthony H Nguyen, Fan Yang, Li-Yin Huang, Alem W Kahsai, Daniel L Bassoni, Bryant J Gavino, Jane E Lamerdin, Sarah Triest, Arun K Shukla, Benjamin Berger, John Little, Albert Antar, Adi Blanc, Chang-Xiu Qu, Xin Chen, Kouki Kawakami, Asuka Inoue, Junken Aoki, Jan Steyaert, Jin-Peng Sun, Michel Bouvier, Georgios Skiniotis, Robert J Lefkowitz
β-Arrestins (βarrs) interact with G protein-coupled receptors (GPCRs) to desensitize G protein signaling, to initiate signaling on their own, and to mediate receptor endocytosis. Prior structural studies have revealed two unique conformations of GPCR-βarr complexes: the "tail" conformation, with βarr primarily coupled to the phosphorylated GPCR C-terminal tail, and the "core" conformation, where, in addition to the phosphorylated C-terminal tail, βarr is further engaged with the receptor transmembrane core...
February 21, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28223314/attenuation-of-epidermal-growth-factor-egf-signaling-by-growth-hormone-gh
#8
Lorena Gonzalez, Johanna Gabriela Miquet, Pablo E Irene, María Eugenia Díaz, Soledad P Rossi, Ana Isabel Sotelo, Mónica B Frungieri, Cristal M Hill, Andrzej Bartke, Daniel Turyn
Transgenic mice overexpressing growth hormone (GH) show increased hepatic protein content of the epidermal growth factor receptor (EGFR), which is broadly associated with cell proliferation and oncogenesis. However, chronically elevated levels of GH result in desensitization of STAT-mediated EGF signal and similar response of Erk1/2 and Akt signaling to EGF compared to normal mice. To ascertain the mechanisms involved in GH attenuation of EGF signaling and the consequences on cell cycle promotion, phosphorylation of signaling mediators was studied at different time points after EGF stimulation, and induction of proteins involved in cell cycle progression was assessed in normal and GH-overexpressing transgenic mice...
February 21, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28221065/the-american-psychological-association-task-force-assessment-of-violent-video-games-science-in-the-service-of-public-interest
#9
Sandra L Calvert, Mark Appelbaum, Kenneth A Dodge, Sandra Graham, Gordon C Nagayama Hall, Sherry Hamby, Lauren G Fasig-Caldwell, Martyna Citkowicz, Daniel P Galloway, Larry V Hedges
A task force of experts was convened by the American Psychological Association (APA) to update the knowledge and policy about the impact of violent video game use on potential adverse outcomes. This APA Task Force on Media Violence examined the existing literature, including the meta-analyses in the field, since the last APA report on media violence in 2005. Because the most recent meta-analyses were published in 2010 and reflected work through 2009, the task force conducted a search of the published studies from 2009-2013...
February 2017: American Psychologist
https://www.readbyqxmd.com/read/28220501/chronic-alcohol-feeding-potentiates-hormone-induced-calcium-signalling-in-hepatocytes
#10
Paula J Bartlett, Anil Noronha Antony, Amit Agarwal, Mauricette Hilly, Victoria L Prince, Laurent Combettes, Jan B Hoek, Lawrence D Gaspers
"Adaptive" responses of the liver to chronic alcohol consumption may underlie the development of cell and tissue injury. Alcohol administration can perturb multiple signalling pathways including phosphoinositide-dependent cytosolic calcium ([Ca(2+) ]i ) increases, which can adversely affect mitochondrial Ca(2+) levels, reactive oxygen species production and energy metabolism. Our data indicate that chronic alcohol feeding induces a leftward shift in the dose-response for Ca(2+) -mobilizing hormones resulting in more sustained and prolonged [Ca(2+) ]i increases in both cultured hepatocytes and hepatocytes within the intact perfused liver...
February 20, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28213687/ofatumumab-for-the-treatment-of-childhood-nephrotic-syndrome
#11
Chia-Shi Wang, Rochelle Schmidt Liverman, Rouba Garro, Roshan Punnoose George, Anastacia Glumova, Alana Karp, Stephanie Jernigan, Barry Warshaw
BACKGROUND: Ofatumumab is a humanized anti-CD20 monoclonal antibody that has recently garnered interest as a potential therapeutic agent for nephrotic syndrome. We report our center's experience in administering ofatumumab to five pediatric patients with idiopathic nephrotic syndrome. METHODS: Between March 2015 and November 2016, five patients were treated with ofatumumab. One patient had post-transplant recurrent focal segmental glomerulosclerosis (FSGS) which had been resistant to plasmapheresis and numerous immunosuppressive agents...
February 17, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28213106/oral-treatment-with-essential-oil-of-hyptis-spicigera-lam-lamiaceae-reduces-acute-pain-and-inflammation-in-mice-potential-interactions-with-transient-receptor-potential-trp-ion-channels
#12
Róli Rodrigues Simões, Igor Dos Santos Coelho, Stella Célio Junqueira, Glauce Regina Pigatto, Marcos José Salvador, Adair Roberto Soares Santos, Felipe Meira de Faria
ETHNOPHARMACOLOGICAL RELEVANCE: The genus Hyptis comprehends almost 400 species widespread in tropical and temperate regions of America. The use of Hyptis spicigera Lam. (Lamiaceae) is reported in traditional medicine due to its gastroprotective, anti-inflammatory and analgesic properties. AIM OF THE STUDY: The rationale of this study was to investigate the potential use of the essential oil of H. spicigera (EOHs) as analgesic. MATERIAL AND METHODS: The antinociceptive effect of EOHs was verified analyzing acute nocifensive behavior of mice induced by chemical noxious stimuli [i...
February 14, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28212150/desensitization-strategies-in-the-patient-awaiting-heart-transplantation
#13
David H Chang, Jon A Kobashigawa
PURPOSE OF REVIEW: The aim of this review is to discuss the impact of antibody sensitization on heart transplant recipients. RECENT FINDINGS: We will discuss the current state of antibody identification, antibody strength and potential antibody pathogenicity. The prevalence of antibody sensitization has increased with increased utilization of mechanical circulatory support (MCS). Data on MCS-related antibody sensitization are reviewed. Important considerations to minimize the prozone effect in antibody testing will be discussed...
February 15, 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/28208913/eosinophilic-granulomatosis-with-polyangiitis-egpa-and-hepatitis-b-infection-a-rare-association
#14
Nidhi Kaeley, Narula Kamakshi
Eosinophilic Granulomatosis with Polyangiitis (EGPA) or Churg-Strauss syndrome is a rare systemic illness which is characterized by necrotizing inflammation of small and medium sized vessels. The prominent features include asthma, eosinophilia, transient pulmonary infiltration and systemic vasculitis. Various triggering factors have been reported as putative aetiological agents of Churg-Strauss syndrome. They include infections, allergic desensitization, vaccinations like hepatitis B and influenza vaccination, cocaine abuse, drugs like leukotriene receptor antagonists and exposure to pigeons...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28205139/the-potentiating-effect-of-calcitonin-gene-related-peptide-on-transient-receptor-potential-vanilloid-1-activity-and-the-electrophysiological-responses-of-rat-trigeminal-neurons-to-nociceptive-stimuli
#15
Duangthip Chatchaisak, Mark Connor, Anan Srikiatkhachorn, Banthit Chetsawang
Growing evidence suggests that calcitonin gene-related peptide (CGRP) participates in trigeminal nociceptive responses. However, the role of CGRP in sensitization or desensitization of nociceptive transduction remains poorly understood. In this study, we sought to further investigate the CGRP-induced up-regulation of transient receptor potential vanilloid-1 (TRPV1) and the responses of trigeminal neurons to nociceptive stimuli. Rat trigeminal ganglion (TG) organ cultures and isolated trigeminal neurons were incubated with CGRP...
February 15, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28204957/insights-into-the-role-of-opioid-receptors-in-the-gi-tract-experimental-evidence-and-therapeutic-relevance
#16
James J Galligan, Catia Sternini
Opioid drugs are prescribed extensively for pain treatment but when used chronically they induce constipation that can progress to opioid-induced bowel dysfunction. Opioid drugs interact with three classes of opioid receptors: mu opioid receptors (MORs), delta opioid receptors (DOR), and kappa opioid receptors (KORs), but opioid drugs mostly target the MORs. Upon stimulation, opioid receptors couple to inhibitory Gi/Go proteins that activate or inhibit downstream effector proteins. MOR and DOR couple to inhibition of adenylate cyclase and voltage-gated Ca(2+) channels and to activation of K(+) channels resulting in reduced neuronal activity and neurotransmitter release...
February 16, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/28198974/effect-of-two-desensitizing-agents-on-dentin-permeability-in-vitro
#17
Hiroshi Ishihata, Masafumi Kanehira, Werner J Finger, Hidekazu Takahashi, Makoto Tomita, Keiichi Sasaki
Objective: The aim of this in vitro study was to investigate the effect of two desensitizing agents and water on hydraulic conductance in human dentin. Material and Methods: GLUMA Desensitizer PowerGel (GLU) contains glutaraldehyde (GA) and 2-hydroxyethyl methacrylate (HEMA), and Teethmate Desensitizer (TD) is a powder comprising tetracalcium phosphate (TTCP) and dicalcium phosphate anhydrous (DCPA) that is mixed with water. Deionized water was used as a negative control (CTR)...
January 2017: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28197552/altered-channel-conductance-states-and-gating-of-gabaa-receptors-by-a-pore-mutation-linked-to-dravet-syndrome
#18
Ciria C Hernandez, Weijing Kong, Ningning Hu, Yujia Zhang, Wangzhen Shen, Laurel Jackson, Xiaoyan Liu, Yuwu Jiang, Robert L Macdonald
We identified a de novo missense mutation, P302L, in the γ-aminobutyric acid type A (GABAA) receptor γ2 subunit gene GABRG2 in a patient with Dravet syndrome using targeted next-generation sequencing. The mutation was in the cytoplasmic portion of the transmembrane segment M2 of the γ2 subunit that faces the pore lumen. GABAA receptor α1 and β3 subunits were coexpressed with wild-type (wt) γ2L or mutant γ2L(P302L) subunits in HEK 293T cells and cultured mouse cortical neurons. We measured currents using whole-cell and single-channel patch clamp techniques, surface and total expression levels using surface biotinylation and Western blotting, and potential structural perturbations in mutant GABAA receptors using structural modeling...
January 2017: ENeuro
https://www.readbyqxmd.com/read/28196852/inpp4b-and-pten-loss-leads-to-pi-3-4-p2-accumulation-and-inhibition-of-pi3k-in-tnbc
#19
Darien E Reed, Kevan M Shokat
: Triple-negative breast cancer [TNBC, lacks expression of estrogen receptor (ER), progesterone receptor (PR) and amplification of HER2/Neu] remains one of the most aggressive subtypes, affects the youngest patients and still lacks an effective targeted therapy(1,2). Both phosphatidylinositol-3-kinase (PI3K)-α and -β contribute to oncogenesis of solid tumors, including the development of breast cancer(3). Inositol polyphosphate-4-phosphatase type II (INPP4B) catalyzes the removal of the 4'-phosphate of phosphatidylinositol-(3,4-bisphosphate (PI-3,4-P2) creating phosphatidylinositol-3-phosphate(4)...
February 14, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28196430/first-in-human-trial-of-a-type-i-positive-allosteric-modulator-of-alpha7-nicotinic-acetylcholine-receptors-pharmacokinetics-safety-and-evidence-for-neurocognitive-effect-of-avl-3288
#20
Kelvin W Gee, Ann Olincy, Richard Kanner, Lynn Johnson, Derk Hogenkamp, Josette Harris, Minhtam Tran, Stephen A Edmonds, William Sauer, Ryan Yoshimura, Timothy Johnstone, Robert Freedman
Type I positive allosteric modulators (PAMs) of the alpha7-nicotinic receptor enhance its cholinergic activation while preserving the spatiotemporal features of synaptic transmission and the receptor's characteristic rapid desensitization kinetics. Alpha7-nicotinic receptor agonists have shown promise for improving cognition in schizophrenia, but longer-term trials have been disappointing. Therefore, the type I PAM AVL-3288 was evaluated for safety and preliminary evidence of neurocognitive effect in healthy human subjects...
February 1, 2017: Journal of Psychopharmacology
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