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https://www.readbyqxmd.com/read/29331682/post-mortem-tryptase-cut-off-level-for-anaphylactic-death
#1
R Tse, C X Wong, K Kesha, J Garland, Y Tran, S Anne, H Elstub, A D Cala, C Palmiere, K L Patchett
Serum mast cell tryptase is used to support the diagnosis of anaphylaxis. The recommended clinical cut-off for total tryptase (<11.4μg/L) appears unsuitable in the post mortem setting due to largely unknown processes which result in significantly elevated levels in these samples. Consequently there is no widely accepted tryptase cut-off level for diagnosing an anaphylactic death. This 5-year retrospective study compared total tryptase levels in post mortem femoral blood in anaphylactic deaths and control...
December 28, 2017: Forensic Science International
https://www.readbyqxmd.com/read/29329223/mast-cells-key-contributors-to-cardiac-fibrosis
#2
REVIEW
Scott P Levick, Alexander Widiapradja
Historically, increased numbers of mast cells have been associated with fibrosis in numerous cardiac pathologies, implicating mast cells in the development of cardiac fibrosis. Subsequently, several approaches have been utilised to demonstrate a causal role for mast cells in animal models of cardiac fibrosis including mast cell stabilising compounds, rodents deficient in mast cells, and inhibition of the actions of mast cell-specific proteases such as chymase and tryptase. Whilst most evidence supports a pro-fibrotic role for mast cells, there is evidence that in some settings these cells can oppose fibrosis...
January 12, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29329020/a-novel-mouse-model-of-atopic-dermatitis-that-is-t-helper-2-th2-polarized-by-an-epicutaneous-allergen
#3
Hyun Jung Park, Wahn Soo Choi, Won Young Lee, Youngsok Choi, Chankyu Park, Jin Hoi Kim, Kwon Ho Hong, Hyuk Song
The pathogenesis of atopic dermatitis (AD) involves T helper 2 (Th2) cells, and effective therapies remain elusive due to the paucity of animal models. We aimed to develop a mouse model of an immune system aberration caused by allergen. Experiments were conducted in two phases. In experiment 1, BALB/c mice were sensitized with one of four chemical allergens - toluene diisocyanate (TDI), hexamethylene diisocyanate (HDI), trimellitic anhydride (TMA), or 2,4-dinitrochlorobenzene (DNCB) - for 3 weeks. Based on results of experiment 1, immunological features were compared between TMA-sensitized BALB/c mice and NC/Nga mice, after exposure to mite extracts, harmful chemicals and detergents in experiment 2...
December 29, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/29328028/-skin-pathology-in-diabetes-mellitus-clinical-and-pathophysiological-correlations-review
#4
K Kochet, I Lytus, I Svistunov, O Sulaieva
Skin pathology is registered in vast majority of patients with diabetes mellitus (DM). Despite the abundance of publications on dermatological problems in DM, there is still a number of gaps to be discussed in terms of pathophysiological mechanisms. The goal of this review was to assess the mechanisms of development of different skin pathologies under DM. One of the key pathogenic mechanisms of skin lesions in diabetes is hyperglycemia and the effects of the advanced glycation end products, inducing oxidative stress, endothelial dysfunction and inflammation; that in its turn can accelerate the mechanisms of skin aging, the development of diabetic dermopathy and scleredema diabeticorum...
December 2017: Georgian Medical News
https://www.readbyqxmd.com/read/29326369/successful-treatment-of-postural-orthostatic-tachycardia-and-mast-cell-activation-syndromes-using-naltrexone-immunoglobulin-and-antibiotic-treatment
#5
Leonard B Weinstock, Jill B Brook, Trisha L Myers, Brent Goodman
A patient with severe postural orthostatic tachycardia syndrome (POTS) and mast cell activation syndrome (MCAS) received immunotherapy with low-dose naltrexone (LDN) and intravenous immunoglobulin (IVIg) and antibiotic therapy for small intestinal bacterial overgrowth (SIBO). A dramatic and sustained response was documented. The utility of IVIg in autoimmune neuromuscular diseases has been published, but clinical experience with POTS is relatively unknown and has not been reported in MCAS. As a short-acting mu-opioid antagonist, LDN paradoxically increases endorphins which then bind to regulatory T cells which regulate T-lymphocyte and B-lymphocyte production and this reduces cytokine and antibody production...
January 11, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29322606/association-of-tumour-infiltrating-regulatory-t-cells-with-adverse-outcomes-in-dogs-with-malignant-tumours
#6
K Sakai, S Maeda, Y Yamada, J K Chambers, K Uchida, H Nakayama, T Yonezawa, N Matsuki
Regulatory T cells (Tregs) infiltrate into a variety of tumour tissues and associate with poor prognosis in humans. However, data on association of Treg infiltration with prognosis is limited in canine tumours. The purpose of this study was to examine the number of tumour-infiltrating Tregs and its association with overall survival (OS) in dogs with malignant tumours. The following 168 canine tumours were included: 37 oral malignant melanomas (OMMs); 14 oral squamous cell carcinomas (OSCCs); 16 pulmonary adenocarcinomas (PAs); 37 mammary carcinomas (MCs); 36 mast cell tumours (MCTs) and 28 hepatocellular carcinomas (HCCs)...
January 11, 2018: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/29321987/gelam-honey-attenuates-ovalbumin-induced-airway-inflammation-in-a-mice-model-of-allergic-asthma
#7
Nur Salme Suhana Shamshuddin, Rozaini Mohd Zohdi
Allergic asthma is a chronic inflammatory disorder of the pulmonary airways. Gelam honey has been proven to possess anti-inflammatory property with great potential to treat an inflammatory condition. However, the effect of ingestion of Gelam honey on allergic asthma has never been studied. This study aimed to investigate the efficacy of Gelam honey on the histopathological changes in the lungs of a mice model of allergic asthma. Forty-two Balb/c mice were divided into seven groups: control, I, II, III, IV, V and VI group...
January 2018: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/29320402/the-secretory-response-of-rat-peritoneal-mast-cells-on-exposure-to-mineral-fibers
#8
Violetta Borelli, Elisa Trevisan, Vita Francesca, Giuliano Zabucchi
BACKGROUND: Exposure to mineral fibers is of substantial relevance to human health. A key event in exposure is the interaction with inflammatory cells and the subsequent generation of pro-inflammatory factors. Mast cells (MCs) have been shown to interact with titanium oxide (TiO₂) and asbestos fibers. In this study, we compared the response of rat peritoneal MCs challenged with the asbestos crocidolite and nanowires of TiO₂ to that induced by wollastonite employed as a control fiber...
January 10, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29319896/skin-inflammation-exacerbates-food-allergy-symptoms-in-epicutaneously-sensitized-mice
#9
Akiko Kawasaki, Naohiro Ito, Hiroki Murai, Motoko Yasutomi, Hironobu Naiki, Yusei Ohshima
BACKGROUND: Cutaneous exposure to food antigen through impaired skin barrier has been shown to induce epicutaneous sensitization, thereby causing IgE-mediated food allergies. OBJECTIVE: We examined whether skin barrier impairment following epicutaneous sensitization exacerbates food allergies. METHODS: BALB/c mice were epicutaneously sensitized by repeated application of ovalbumin (OVA) to MC903-pretreated ear skin for 48 hours weekly and then intragastrically challenged with OVA...
January 10, 2018: Allergy
https://www.readbyqxmd.com/read/29319891/teicoplanin-anaphylaxis-associated-with-surgical-prophylaxis
#10
Tariq Azamgarhi, Ashik Shah, Simon Warren
BACKGROUND: The rate of true anaphylaxis to teicoplanin is currently unknown. METHODS: A case-series including all suspected anaphylactic reactions attributed to teicoplanin anaphylaxis within a single institution over a 29-month period were categorised according to the probability of true IgE mediated anaphylaxis using previously published criteria. The number of patients who receive Teicoplanin was determined and used to calculate the rate of IgE mediated anaphylaxis...
January 10, 2018: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29316717/scanning-the-immunopathogenesis-of-psoriasis
#11
REVIEW
Andrea Chiricozzi, Paolo Romanelli, Elisabetta Volpe, Giovanna Borsellino, Marco Romanelli
Psoriasis is a chronic inflammatory skin disease, the immunologic model of which has been profoundly revised following recent advances in the understanding of its pathophysiology. In the current model, a crosstalk between keratinocytes, neutrophils, mast cells, T cells, and dendritic cells is thought to create inflammatory and pro-proliferative circuits mediated by chemokines and cytokines. Various triggers, including recently identified autoantigens, Toll-like receptor agonists, chemerin, and thymic stromal lymphopoietin may activate the pathogenic cascade resulting in enhanced production of pro-inflammatory and proliferation-inducing mediators such as interleukin (IL)-17, tumor necrosis factor (TNF)-α, IL-23, IL-22, interferon (IFN)-α, and IFN-γ by immune cells...
January 8, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29316647/role-of-polyamines-in-asthma-pathophysiology
#12
REVIEW
Vaibhav Jain
Asthma is a complex disease of airways, where the interactions of immune and structural cells result in disease outcomes with airway remodeling and airway hyper-responsiveness. Polyamines, which are small-sized, natural super-cations, interact with negatively charged intracellular macromolecules, and altered levels of polyamines and their interactions have been associated with different pathological conditions including asthma. Elevated levels of polyamines have been reported in the circulation of asthmatic patients as well as in the lungs of a murine model of asthma...
January 6, 2018: Medical Sciences: Open Access Journal
https://www.readbyqxmd.com/read/29314691/mastocytosis-pathogenesis-clinical-manifestation-and-treatment
#13
Nicola Wagner, Petra Staubach
The term mastocytosis designates a group of rare disorders characterized by typical skin lesions, frequently associated episodes of anaphylaxis, and clinical symptoms related to the release of various mediators. Dermatologists/allergists are frequently the first to establish the diagnosis. The condition is based on clonal mast cell proliferation, usually in the skin or bone marrow and only rarely in the gastrointestinal tract or other tissues. In general, mastocytosis has a good prognosis in terms of life expectancy...
January 2018: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/29310801/mechanisms-of-i-r-induced-endothelium-dependent-vasodilator-dysfunction
#14
Ronald J Korthuis
Ischemia/reperfusion (I/R) induces leukocyte/endothelial cell adhesive interactions (LECA) in postcapillary venules and impaired endothelium-dependent, NO-mediated dilatory responses (EDD) in upstream arterioles. A large body of evidence has implicated reactive oxygen species, adherent leukocytes, and proteases in postischemic EDD dysfunction in conduit arteries. However, arterioles represent the major site for the regulation of vascular resistance but have received less attention with regard to the mechanisms underlying their reduced responsiveness to EDD stimuli in I/R...
2018: Advances in Pharmacology
https://www.readbyqxmd.com/read/29306980/sex-in-respiratory-and-skin-allergies
#15
REVIEW
Erminia Ridolo, Cristoforo Incorvaia, Irene Martignago, Marco Caminati, Giorgio Walter Canonica, Gianenrico Senna
A bulk of literature demonstrated that respiratory allergy, and especially asthma, is prevalent in males during childhood, while it becomes more frequent in females from adolescence, i.e., after menarche, to adulthood. The mechanisms underlying the difference between females and males are the effects on the immune response of female hormones and in particular the modulation of inflammatory response by estrogens, as well as the result of the activity of various cells, such as dendritic cells, innate lymphoid cells, Th1, Th2, T regulatory (Treg) and B regulatory (Bregs) cells, and a number of proteins and cytokines, which include interleukin (IL)-4, IL-5, IL-10, and IL-13...
January 6, 2018: Clinical Reviews in Allergy & Immunology
https://www.readbyqxmd.com/read/29305308/mast-cell-activation-syndrome-mimicking-breast-cancer-case-report-with-pathophysiologic-considerations
#16
Gerhard J Molderings, Ruth Knüchel-Clarke, Hans-Jörg Hertfelder, Christiane Kuhl
No abstract text is available yet for this article.
December 12, 2017: Clinical Breast Cancer
https://www.readbyqxmd.com/read/29304758/molecular-epidemiology-of-neisseria-gonorrhoeae-strains-circulating-in-indonesia-using-multi-locus-variable-number-tandem-repeat-analysis-mlva-and-neisseria-gonorrhoeae-multi-antigen-sequence-typing-ng-mast-techniques
#17
I Putu Yuda Hananta, Alje Pieter van Dam, Maarten Franciscus Schim van der Loeff, Mirjam Dierdorp, Carolien Marleen Wind, Hardyanto Soebono, Henry John Christiaan de Vries, Sylvia Maria Bruisten
BACKGROUND: Control of gonorrhea in resource-limited countries, such as Indonesia, is mostly unsuccessful. Examining Neisseria gonorrhoeae (Ng) transmission networks using strain typing might help prioritizing public health interventions. METHODS: In 2014, urogenital Ng strains were isolated from clients of sexually transmitted infection clinics in three Indonesian cities. Strains were typed using Multiple-Locus Variable Number Tandem Repeat (VNTR) Analysis (MLVA) and Ng Multi-Antigen Sequence Typing (NG-MAST) at the Public Health Service, Amsterdam, the Netherlands, and compared to Dutch strains collected from 2012 to 2015...
January 5, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29301162/milbenallergie-im-hno-bereich-bedeutung-diagnostik-und-therapieoptionen
#18
Ludger Klimek, Moritz Gröger, Sven Becker
Allergic rhinitis (AR) affects ca. 20% of the population. Approximately one third of patients affected by AR are suffering from perennial rhinitis due to mite allergy. Perennial rhinitis is the form of the disease that is most frequently associated with other allergy-related comorbidities such as asthma and atopic dermatitis, sleep disorders, chronic sinusitis, eustachian tube dysfunction and others.The often non-specific symptoms and the insidious course may lead to misinterpretations in diagnosing the disease...
January 2018: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/29300311/the-suppressive-activity-of-fucofuroeckol-a-derived-from-brown-algal-ecklonia-stolonifera-okamura-on-uvb-induced-mast-cell-degranulation
#19
Thanh Sang Vo, Se-Kwon Kim, BoMi Ryu, Dai Hung Ngo, Na-Young Yoon, Long Giang Bach, Nguyen Thi Nhat Hang, Dai Nghiep Ngo
UV light, especially UVB, is known as a trigger of allergic reaction, leading to mast cell degranulation and histamine release. In this study, phlorotannin Fucofuroeckol-A (F-A) derived from brown algal Ecklonia stolonifera Okamura was evaluated for its protective capability against UVB-induced allergic reaction in RBL-2H3 mast cells. It was revealed that F-A significantly suppress mast cell degranulation via decreasing histamine release as well as intracellular Ca2+ elevation at the concentration of 50 μM...
January 4, 2018: Marine Drugs
https://www.readbyqxmd.com/read/29299670/flexibility-is-the-key-metabolic-and-thermoregulatory-behaviour-in-a-small-endotherm
#20
Franz Langer, Nadine Havenstein, Joanna Fietz
Hibernation is the most effective way to reduce thermoregulatory costs during periods of unfavourable environmental conditions. In preparation to hibernation, fat-storing hibernators accumulate large quantities of body fat, which increases their locomotor costs and also the risk of predation. As a consequence, there should be a strong selective pressure to restrict pre-hibernation fattening to a short-time period before the onset of hibernation. The edible dormouse (Glis glis) is characterized by having adapted its whole life history to the irregularly occurring mast-seeding pattern of the European beech (Fagus sylvaticus)...
January 3, 2018: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
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