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https://www.readbyqxmd.com/read/28933792/a-common-haplotype-containing-functional-cacna1h-variants-is-frequently-coinherited-with-increased-tpsab1-copy-number
#1
Jonathan J Lyons, Stephanie C Stotz, Jack Chovanec, Yihui Liu, Katie L Lewis, Celeste Nelson, Thomas DiMaggio, Nina Jones, Kelly D Stone, Heejong Sung, Leslie G Biesecker, Michael A Colicos, Joshua D Milner
PurposeCaV3.2 signaling contributes to nociception, pruritus, gastrointestinal motility, anxiety, and blood pressure homeostasis. This calcium channel, encoded by CACNA1H, overlaps the human tryptase locus, wherein increased TPSAB1 copy number causes hereditary α-tryptasemia. Germ-line CACNA1H variants may contribute to the variable expressivity observed with this genetic trait.MethodsTryptase-encoding sequences at TPSAB1 and TPSB2, and TPSG1 and CACNA1H variants were genotyped in 46 families with hereditary α-tryptasemia syndrome...
September 21, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/28929692/-metabolomics-of-bovine-serum-albumin-induced-allergic-reactions-based-on-uplc-q-tof-ms
#2
Yuan-Yuan Gu, Dan-Dan Zhang, Cheng Feng, Yu Wang, Da-Zhong Chen, Yan-Hong Wang
The metabonomic techniques were used to study the changes in endogenous metabolites between urines of rats in normal physiological conditions and bovine serum albumin induced allergic reactions, identify potential biomarkers associated with allergic reactions, and then analyze the metabolic pathways and the metabolic mechanisms of allergic reactions. The bovine serum albumin-induced allergic reactions in rats were adopted as a model to detect histamine and tryptase in rat serum and observe the issue morphology of lungs and trachea in rats...
November 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28919366/prevalence-and-risk-factors-for-fragility-fracture-in-systemic-mastocytosis
#3
Yannick Degboé, Marine Eischen, Delphine Nigon, Pol-André Apoil, Claire Mailhol, Emilie Tournier, Camille Laurent, Katia Hanssens, Olivier Hermine, Carle Paul, Michel Laroche, Cristina Bulai-Livideanu
OBJECTIVES: Systemic mastocytosis (SM) is characterized by the accumulation of mast cells in tissues other than the skin. Bone involvement although frequent has not been thoroughly evaluated. Primary objective was to determine risk factors associated with fragility fractures (FF) in SM. Secondary objectives were to evaluate the ability of bone marrow tryptase (BMT) level to identify patients with FF, and to describe bone involvement in SM. METHODS: We analyzed retrospectively all consecutive patients seen in our expert center, with a diagnosis of SM according to the 2001 WHO criteria, and with complete bone assessment...
September 14, 2017: Bone
https://www.readbyqxmd.com/read/28888252/anaphylaxis-and-clinical-utility-of-real-world-measurement-of-acute-serum-tryptase-in-uk-emergency-departments
#4
Richard J Buka, Rebecca C Knibb, Richard J Crossman, Cathryn L Melchior, Aarnoud P Huissoon, Scott Hackett, Susan Dorrian, Matthew W Cooke, Mamidipudi T Krishna
BACKGROUND: British guidelines recommend that serial acute serum tryptase measurements be checked in all adults and a subset of children presenting with anaphylaxis. This is the first study reporting the clinical utility of acute serum tryptase in a "real-world" emergency department (ED) setting following the publication of the World Allergy Organization (WAO) criteria for anaphylaxis. OBJECTIVES: To (1) assess sensitivity, specificity, and positive and negative predictive values (PPV, NPV) of acute serum tryptase in anaphylaxis; (b) determine factors associated with higher acute serum tryptase levels; and (c) audit compliance of acute serum tryptase measurement in the ED...
September 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28858880/the-histopathology-of-urticaria-revisited-clinical-pathological-study
#5
Aviv Barzilai, Lior Sagi, Sharon Baum, Henri Trau, Michael Schvimer, Iris Barshack, Michal Solomon
BACKGROUND: The classic histopathological findings of urticaria include dermal edema and a sparse perivascular infiltrate of neutrophils, eosinophils, macrophages, and lymphocytes. However, this pattern is inconsistently described. OBJECTIVE: To describe the histological and immunofluorescence characteristics of urticaria and to identify distinctive patterns. METHODS: A retrospective study was performed in which the medical files and biopsy specimens of 58 patients with acute and chronic classical urticaria were reviewed...
October 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28855975/case-report-unusual-manifestation-of-kit-negative-systemic-mastocytosis
#6
Beatriz Cáceres-Nazario, William Cáceres-Perkins, David Tasso, Elizabeth Calderón-Alicea, Daniel Conde-Sterling, Norma Arroyo-Portela
Aggressive systemic mastocytosis is a rare hematologic neoplastic disease that presents with a poor prognosis and low survival rate. It typically manifests with symptoms associated to mast cell release of bioactive substances, causing anaphylaxis, flushing, autonomic and hemodynamic instability, gastric distress and headache. Moreover, more than 95% of cases are related to a mutation in codon 816 of the KIT gene, located on human chromosome 4q12 which codes for a type III receptor tyrosine kinase. We present a 78 year-old Hispanic man diagnosed with the aggressive subtype of systemic mastocytosis, who had an atypical manifestation and a KIT negative variant...
December 2016: American Journal of Hematology/oncology
https://www.readbyqxmd.com/read/28843624/sorafenib-stimulates-human-skin-type-mast-cell-degranulation-and-maturation
#7
Yukari Mizukami, Koji Sugawara, Yukimi Kira, Daisuke Tsuruta
BACKGROUND: Sorafenib is a multi-kinase inhibitor for treating advanced hepatocellular and renal cell carcinomas by targeting various types of receptors and signaling molecules, including vascular endothelial growth factor receptors, platelet-derived growth factor receptor, and Raf-1. Sorafenib may cause diverse cutaneous adverse reactions, including hand-foot reaction, facial and scalp eruptions, alopecia and pruritus. However, the mechanism of these adverse effects has not been well-investigated...
August 12, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/28818095/frequency-distribution-and-immunologic-nature-of-infusion-reactions-in-subjects-receiving-pegloticase-for-chronic-refractory-gout
#8
Leonard H Calabrese, Arthur Kavanaugh, Anthony E Yeo, Peter E Lipsky
BACKGROUND: To assess frequency and distribution of infusion reactions (IRs) in responders and nonresponders in randomized clinical trials (RCTs) of intravenous pegloticase and the utility of the National Institute of Allergy and Infectious Disease/Food and Allergy and Anaphylaxis Network (NIAID/FAAN) criteria for identifying anaphylaxis in subjects experiencing IRs. METHODS: IRs from two RCTs of pegloticase were evaluated and categorized as anaphylaxis, hypersensitivity, or other...
August 17, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28800865/anaphylaxis
#9
REVIEW
Daniel LoVerde, Onyinye I Iweala, Ariana Eginli, Guha Krishnaswamy
Anaphylaxis is a systemic, life-threatening disorder triggered by mediators released by mast cells and basophils activated via allergic (IgE-mediated) or nonallergic (non-IgE-mediated) mechanisms. It is a rapidly evolving, multisystem process involving the integumentary, pulmonary, gastrointestinal, and cardiovascular systems. Anaphylaxis and angioedema are serious disorders that can lead to fatal airway obstruction and culminate in cardiorespiratory arrest, resulting in hypoxemia and/or shock. Often, these disorders can be appropriately managed in an outpatient setting; however, these conditions can be severe enough to warrant evaluation of the patient in the ED and in some cases, hospitalization, and management in an ICU...
August 8, 2017: Chest
https://www.readbyqxmd.com/read/28798744/the-mast-cell-contact-and-coagulation-system-connection-in-anaphylaxis
#10
REVIEW
Mar Guilarte, Anna Sala-Cunill, Olga Luengo, Moisés Labrador-Horrillo, Victoria Cardona
Anaphylaxis is the most severe form of allergic reaction, resulting from the effect of mediators and chemotactic substances released by activated cells. Mast cells and basophils are considered key players in IgE-mediated human anaphylaxis. Beyond IgE-mediated activation of mast cells/basophils, further mechanisms are involved in the occurrence of anaphylaxis. New insights into the potential relevance of pathways other than mast cell and basophil degranulation have been unraveled, such as the activation of the contact and the coagulation systems...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28796123/hymenoptera-induced-anaphylaxis-is-it-a-mast-cell-driven-hematological-disorder
#11
Knut Brockow, Cem Akin
PURPOSE OF REVIEW: Hymenoptera-induced allergy (HVA) is a common cause of anaphylaxis and may be fatal. It is associated with systemic mastocytosis in about 7% of adult patients. Systemic mastocytosis is a proliferative disorder of hematopoietic mast cell progenitors. There is recent data on the association between systemic mastocytosis and HVA. RECENT FINDINGS: Hymenoptera venoms are the most common immunoglobulin E-mediated elicitors of anaphylaxis in patients with mastocytosis...
August 8, 2017: Current Opinion in Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28780940/diagnosis-and-management-of-anaphylaxis-in-precision-medicine
#12
REVIEW
Mariana Castells
Anaphylaxis is the most severe and frightening of the allergic reactions, placing patients at high risk and demanding prompt recognition and immediate management by health care providers. Yet because its symptoms imitate those of other diseases, such as asthma and urticaria, current data suggest that its diagnosis is often missed, with underuse of tryptase measurement; its treatment is delayed, with little use of epinephrine; and its underlying cause or causes are poorly investigated. Deaths from anaphylaxis are difficult to investigate because of miscoding...
August 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28774302/airway-and-parenchyma-immune-cells-in-influenza-a-h1n1-pdm09-viral-and-non-viral-diffuse-alveolar-damage
#13
Monique Buttignol, Ruy Camargo Pires-Neto, Renata Calciolari Rossi E Silva, Marina Ballarin Albino, Marisa Dolhnikoff, Thais Mauad
BACKGROUND: Diffuse alveolar damage (DAD), which is the histological surrogate for acute respiratory distress syndrome (ARDS), has a multifactorial aetiology. Therefore it is possible that the immunopathology differs among the various presentations of DAD. The aim of this study is to compare lung immunopathology of viral (influenza A(H1N1)pdm09) to non-viral, extrapulmonary aetiologies in autopsy cases with DAD. METHODS: The lung tissue of 44 patients, was divided in the H1N1 group (n = 15) characterized by severe pulmonary injury due to influenza A(H1N1)pdm09 infection; the ARDS group (n = 13), characterized by patients with DAD due to non-pulmonary causes; and the Control group (n = 16), consisting of patients with non-pulmonary causes of death...
August 3, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28761288/influence-of-repeated-senna-laxative-use-on-skin-barrier-function-in-mice
#14
Satoshi Yokoyama, Keiichi Hiramoto, Yurika Yamate, Kazuya Ooi
BACKGROUND: Senna, one of the major stimulant laxatives, is widely used for treating constipation. Chronic senna use has been reported to be associated with colonic disorders such as melanosis coli and/or epithelial hyperplasia. However, there is no obvious information on the influence of chronic senna use on organs except for the intestine. OBJECTIVE: To clarify the influence of senna laxative use on skin barrier function by repeated senna administration. METHODS: Eight-week-old male hairless mice received senna (10 mg/kg/day) for 21 days...
August 2017: Annals of Dermatology
https://www.readbyqxmd.com/read/28761261/presence-of-mast-cells-and-mast-cell-degranulation-in-scalp-biopsies-of-telogen-effluvium
#15
Shane A Grace, Angela M Sutton, Nina Abraham, Eric S Armbrecht, Claudia I Vidal
BACKGROUND: Telogen effluvium (TE) is a type of acquired, diffuse alopecia that occurs due to an abnormal shift of scalp hair follicles from anagen to telogen, leading to premature shedding of hair. Previous studies have suggested the existence of a neuroimmunologic "brain-hair follicle" axis, in which mast cells have been implicated as an important link between the nervous system and immunologic system. OBJECTIVE: The current study sought to investigate the role of mast cell presence and mast cell degranulation in the pathogenesis of TE...
January 2017: International Journal of Trichology
https://www.readbyqxmd.com/read/28756894/spatial-distribution-of-mast-cells-and-macrophages-around-tumor-glands-in-human-breast-ductal-carcinoma
#16
Roberto Tamma, Diego Guidolin, Tiziana Annese, Cinzia Tortorella, Simona Ruggieri, Serena Rega, Francesco A Zito, Beatrice Nico, Domenico Ribatti
Macrophages and mast cells are usually present in the tumor microenvironment and play an important role as regulators of inflammation, immunological response and angiogenesis in the tumor microenvironment. In this study, we have evaluated macrophage, mast cell, and microvessel density in a selected group of different grade of invasive breast carcinoma tumor specimens. Furthermore, we have investigated the pattern of distribution of CD68-positive macrophages and tryptase-positive mast cells around tumor glands...
July 27, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28755526/blood-and-nasal-epigenetics-correlate-to-allergic-rhinitis-symptom-development-in-the-environmental-exposure-unit
#17
Michelle L North, Meaghan J Jones, Julia L MacIsaac, Alexander M Morin, Lisa M Steacy, Alexander Gregor, Michael S Kobor, Anne K Ellis
BACKGROUND: Epigenetic alterations may represent new therapeutic targets and/or biomarkers of allergic rhinitis (AR). Our aim was to examine genome-wide epigenetic changes induced by controlled pollen exposure in the Environmental Exposure Unit (EEU). METHODS: 38 AR-sufferers and 8 non-allergic controls were exposed to grass pollen for 3h on two consecutive days. We interrogated DNA methylation at baseline and 3h in peripheral blood mononuclear cells (PBMCs) using the Infinium Methylation 450K array...
July 29, 2017: Allergy
https://www.readbyqxmd.com/read/28754162/sensitization-of-asic3-by-proteinase-activated-receptor-2-signaling-contributes-to-acidosis-induced-nociception
#18
Jing Wu, Ting-Ting Liu, Yi-Mei Zhou, Chun-Yu Qiu, Ping Ren, Ming Jiao, Wang-Ping Hu
BACKGROUND: Tissue acidosis and inflammatory mediators play critical roles in pain. Pro-inflammatory agents trypsin and tryptase cleave and activate proteinase-activated receptor 2 (PAR2) expressed on sensory nerves, which is involved in peripheral mechanisms of inflammation and pain. Extracellular acidosis activates acid-sensing ion channel 3 (ASIC3) to trigger pain sensation. Here, we show that a functional interaction of PAR2 and ASIC3 could contribute to acidosis-induced nociception...
July 28, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28751819/effects-of-secreted-mast-cell-mediators-on-retinal-pigment-epithelial-cells-focus-on-mast-cell-tryptase
#19
Rei Arai, Ayumi Usui-Ouchi, Yosuke Ito, Keitaro Mashimo, Akira Murakami, Nobuyuki Ebihara
Numerous mast cells are present in the choroid, but the effects of mast cell mediators on retinal pigment epithelial (RPE) cells are not well understood. We investigated the influence of mast cell mediators on RPE cells in vitro, focusing on tryptase. Expression of receptors was examined by the reverse transcription polymerase chain reaction. We also assessed production of interleukin 8 and vascular endothelial growth factor (VEGF) after RPE cells were stimulated with mast cell mediators by using an antibody array and enzyme-linked immunosorbent assay...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28746926/histamine-iontophoresis-as-in-vivo-model-to-study-human-skin-inflammation-with-minimal-barrier-impairment-pilot-study-results-of-application-of-the-model-to-a-sensitive-skin-panel
#20
Denise Falcone, Natallia Uzunbajakava, Renée Richters, Peter C M van de Kerkhof, Piet E J van Erp
BACKGROUND/AIMS: Histamine iontophoresis is known to elicit itch and a wheal-and-flare reaction; however, its impact on the skin barrier and underlying compartments has not been thoroughly evaluated yet. The primary objective of this study was to characterize that using immunohistochemistry, biophysical measurements, and image analysis, and secondly, to explore whether skin reactions to this model differ in sensitive skin (SS). METHODS: Eighteen healthy subjects, n = 9 with SS and n = 9 with non-sensitive skin (NSS), were included based on a perception-based questionnaire...
2017: Skin Pharmacology and Physiology
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