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https://www.readbyqxmd.com/read/28315938/the-relationship-between-breast-cancer-molecular-subtypes-and-mast-cell-populations-in-tumor-microenvironment
#1
Anna Glajcar, Joanna Szpor, Agnieszka Pacek, Katarzyna Ewa Tyrak, Florence Chan, Joanna Streb, Diana Hodorowicz-Zaniewska, Krzysztof Okoń
Mast cells (MCs) are a part of the innate immune system. The MC functions toward cancer are partially based on the release of chymase and tryptase. However, the MC effect on breast cancer is controversial. The aim of our study was to investigate the presence of MCs in breast cancer tumors of different molecular subtypes and their relationships with other pathological prognostic factors. Tryptase- and chymase-positive mast cell densities were evaluated by immunohistochemistry in 108 primary invasive breast cancer tissue samples...
March 18, 2017: Virchows Archiv: An International Journal of Pathology
https://www.readbyqxmd.com/read/28315853/effects-of-extracts-and-compounds-from-tricholoma-populinum-lange-on-degranulation-and-il-2-il-8-secretion-of-immune-cells
#2
Simon Merdivan, Kristina Jenett-Siems, Karsten Siems, Timo H J Niedermeyer, Nadin Schultze, Carmen Steinborn, Carsten Gründemann, Ulrike Lindequist
Tricholoma populinum Lange is an edible basidiomycete from the family Tricholomataceae. Extracts, fractions, and different metabolites isolated from the fruiting bodies of this mushroom were tested for degranulation-inhibiting activities on RBL-2H3 cells (rat basophils). Dichloromethane extracts decreased degranulation significantly, as did a fraction after column chromatography. In addition, the extract decreased the IL-2 release from Jurkat T cells and the release of IL-8 from HMC-1 human mast cells. The results show the significant effects of extracts of T...
March 20, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28314259/mast-cells-in-mammary-carcinogenesis-host-or-tumor-supporters
#3
Ana I Faustino-Rocha, Adelina Gama, Maria J Neuparth, Paula A Oliveira, Rita Ferreira, Mário Ginja
BACKGROUND/AIM: The effects of mast cells on carcinogenesis is not yet fully understood. This work aimed to disclose the role of mast cells in mammary carcinogenesis in a rat model. MATERIALS AND METHODS: Mammary tumors were induced by the administration of N-methyl-N-nitrosourea (MNU) in three groups of rats. Animals from one group were treated with ketotifen immediately after MNU administration, and animals from another only received ketotifen after the development of the first mammary tumor...
March 2017: Anticancer Research
https://www.readbyqxmd.com/read/28302706/acclimatization-of-the-systemic-microcirculation-to-alveolar-hypoxia-is-mediated-by-inos-dependent-increased-nitric-oxide-availability
#4
Alfred J Casillan, Jie Chao, John G Wood, Norberto C Gonzalez
Rats breathing 10% O2 show a rapid and widespread systemic microvascular inflammation that results from nitric oxide (NO) depletion secondary to increased reactive O2 species (ROS) generation. The inflammation eventually resolves and the microcirculation becomes resistant to more severe hypoxia. These experiments were directed to determine the mechanisms underlying this microvascular acclimatization process. Intravital microscopy of the mesentery showed that after three weeks of hypoxia (PB ~380 Torr, inspired PO2 ~ 68-70 Torr) rats showed no evidence of inflammation; however, treatment with the inducible NO synthase (iNOS) inhibitor L-N(6)-(1-Iminoethyl) lysine dihydrochloride (L-NIL) led to ROS generation, leukocyte-endothelial adherence and emigration, and increased vascular permeability...
March 16, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28301407/in-vivo-cysteinyl-leukotriene-release-in-allergic-and-nonallergic-immediate-hypersensitivity-reactions-during-anesthesia
#5
Dominique Laroche, Pierre Léturgie, Delphine Mariotte, Yann Ollivier, Jean-Luc Hanouz, Brigitte Le Mauff, Jean-Jacques Parienti
BACKGROUND: Immediate hypersensitivity reactions occurring during anesthesia are classified as allergic when skin tests and mast cell tryptase are positive and as nonallergic when negative results are obtained. Cysteinyl leukotrienes (cysLTs) are potent mediators synthesized by mast cell and eosinophil that induce bronchial constriction. They could play a role in hypersensitivity reactions. METHODS: cysLT C4, D4, and E4 concentrations were measured by a competition immunoassay in serial plasma samples obtained prospectively from 21 anesthetized controls and retrospectively from 34 patients who reacted at induction of anesthesia (24 with allergic and 10 with nonallergic reactions)...
March 16, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28300877/mast-cell-concentration-and-skin-wound-contraction-in-rats-treated-with-ximenia-americana-l
#6
José de Castro Souza Junior Neto, Lígia Reis de Moura Estevão, Liriane Baratella-Evêncio, Marcela Gabriela Feitosa Vieira, Ricardo Santos Simões, Rinaldo Florencio-Silva, Luís Evêncio-Luz, Joaquim Evêncio-Neto
PURPOSE: To evaluate wound contraction and the concentration of mast cells in skin wounds treated with wild plum (Ximenia americana) essential oil-based ointment in rats. METHODS: Sixty rats were submitted to two cutaneous wounds in the thoracic region, on the right and left antimeres. Thereon, they were divided into three groups: GX (wounds treated once a day with hydro alcoholic branch extract of Ximenia americana), GP (wounds that received vehicle), and GC (wounds without product application)...
February 2017: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/28299830/repeated-water-avoidance-stress-induces-visceral-hypersensitivity-role-of-il-1-il-6-and-peripheral-corticotropin-releasing-factor
#7
Tsukasa Nozu, Saori Miyagishi, Rintaro Nozu, Kaoru Takakusaki, Toshikatsu Okumura
BACKGROUND AND AIM: Repeated water avoidance stress (WAS) induces visceral hypersensitivity. Additionally, it is also known to activate corticotropin-releasing factor (CRF), mast cells and pro-inflammatory cytokines systems, but their precise roles on visceral sensation have not been determined definitely. The aim of the study was to explore this issue. METHODS: Abdominal muscle contractions induced by colonic balloon distention, i.e. visceromotor response (VMR) was detected electrophysiologically in conscious rats...
March 15, 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28298726/reproducibility-and-interobserver-agreement-of-the-r-e-n-a-l-nephrometry-score-focus-on-imaging-features
#8
Richard Mast Vilaseca, Antonio Carlos Westphalen, Henrique Ferreira Reis, Orlando Salomão Zogbi, Gyl Eanes Silva, Rodolfo Borges Dos Reis, Valdair Francisco Muglia
OBJECTIVE: To investigate the reproducibility and interobserver agreement for R.E.N.A.L. nephrometry scoring system. MATERIALS AND METHODS: Two independent radiologists retrospectively analyzed 46 consecutive patients with renal masses, between 2008 and 2012, using the R.E.N.A.L. nephrometry score (RENAL-NS), which is based on the evaluation of five anatomical features of the tumor, as evaluated with computed tomography or magnetic resonance imaging: Radius, Exophytic/endophytic properties, Nearness to the collecting system, Anterior or posterior descriptor, and Location relative to the polar line...
January 2017: Radiologia Brasileira
https://www.readbyqxmd.com/read/28298375/knee-and-hip-intra-articular-adipose-tissues-iaats-compared-with-autologous-subcutaneous-adipose-tissue-a-specific-phenotype-for-a-central-player-in-osteoarthritis
#9
Florent Eymard, Audrey Pigenet, Danièle Citadelle, Joan Tordjman, Louise Foucher, Cindy Rose, Charles-Henri Flouzat Lachaniette, Christine Rouault, Karine Clément, Francis Berenbaum, Xavier Chevalier, Xavier Houard
OBJECTIVES: Compared with subcutaneous adipose tissue (SCAT), infrapatellar fat pad (IFP), the main knee intra-articular adipose tissue (IAAT), has an inflammatory phenotype in patients with osteoarthritis (OA). We phenotyped suprapatellar fat pad (SPFP) and hip acetabular fat pad (AFP), two other IAATs, to determinate the unique signature of IAATs compared with SCAT. METHODS: IFP, SPFP, AFP and autologous SCAT were obtained from patients with OA during total knee (n=38) or hip replacement (n=5)...
March 15, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28297079/putting-donor-health-first-in-strategies-to-mitigate-donor-iron-deficiency
#10
EDITORIAL
Alan E Mast
No abstract text is available yet for this article.
March 2017: Transfusion
https://www.readbyqxmd.com/read/28294257/protein-bound-vaccinium-fruit-polyphenols-decrease-ige-binding-to-peanut-allergens-and-rbl-2h3-mast-cell-degranulation-in-vitro
#11
Nathalie J Plundrich, Rishipal R Bansode, E Allen Foegeding, Leonard L Williams, Mary Ann Lila
Peanut allergy is a worldwide health concern. In this study, the natural binding properties of plant-derived polyphenols to proteins was leveraged to produce stable protein-polyphenol complexes comprised of peanut proteins and cranberry (Vaccinium macrocarpon Ait.) or lowbush blueberry (Vaccinium angustifolium Ait.) pomace polyphenols. Protein-bound and free polyphenols were characterized and quantified by multistep extraction of polyphenols from protein-polyphenol complexes. Immunoblotting was performed with peanut-allergic plasma to determine peanut protein-specific IgE binding to unmodified peanut protein, or to peanut protein-polyphenol complexes...
March 15, 2017: Food & Function
https://www.readbyqxmd.com/read/28293189/investigation-into-the-role-of-pi3k-and-jak3-kinase-inhibitors-in-murine-models-of-asthma
#12
Akshaya D Wagh, Manoranjan Sharma, Jogeshwar Mahapatra, Abhijeet Chatterjee, Mukul Jain, Veeranjaneyulu Addepalli
Asthma is a clinical disorder commonly characterized by chronic eosinophilic inflammation, remodeling and hyper responsiveness of the airways. However, the kinases like Phosphoinositide 3 kinase (PI3K) and Janus kinase 3 (JAK3) are involved in mast cell proliferation, activation, recruitment, migration, and prolonged survival of inflammatory cells. The present study was designed to evaluate the in-vivo comparative effects of two kinase inhibitors on airway inflammation and airway remodeling in acute and chronic models of asthma...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28292887/orai-and-trpc-channel-characterization-in-fc%C3%AE%C2%B5ri-mediated-calcium-signaling-and-mediator-secretion-in-human-mast-cells
#13
Hannah E Wajdner, Jasmine Farrington, Claire Barnard, Peter T Peachell, Christine G Schnackenberg, Joseph P Marino, Xiaoping Xu, Karen Affleck, Malcolm Begg, Elizabeth P Seward
Inappropriate activation of mast cells via the FcεRI receptor leads to the release of inflammatory mediators and symptoms of allergic disease. Calcium influx is a critical regulator of mast cell signaling and is required for exocytosis of preformed mediators and for synthesis of eicosanoids, cytokines and chemokines. Studies in rodent and human mast cells have identified Orai calcium channels as key contributors to FcεRI-initiated mediator release. However, until now the role of TRPC calcium channels in FcεRI-mediated human mast cell signaling has not been published...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28291999/-seasonal-and-perennial-allergic-rhinoconjunctivitis
#14
K Schröder, D Finis, S Meller, B A Buhren, M Wagenmann, G Geerling
Seasonsal allergic conjunctivitis (SAC) and perennial allergic conjunctivitis (PAC) as well as intermittent and persistent allergic rhinitis are widespread diseases. Because a combined occurrence of ocular and nasal symptoms is very common the summarising term allergic rhinoconjunctivitis is frequently used. SAC and PAC representing the two acute forms of allergic conjunctivitis account for more than 90% of all cases of allergic conjunctivitis. Compared to the chronic forms of allergic conjunctivitis their course of disease is milder...
February 2017: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/28291548/the-role-of-interleukin-17a-in-the-pathogenesis-of-kidney-diseases
#15
REVIEW
Charlotte Cortvrindt, Reinhart Speeckaert, Alena Moerman, Joris R Delanghe, Marijn M Speeckaert
Being a member of the IL-17 family, comprising six structurally related ligands, IL-17A is a cytokine, produced by multiple cell types, such as CD4(+)αβ T cells, γδ T cells, natural killer cells, neutrophils, macrophages, dendritic cells, lymphoid tissue inducer cells, mast cells and plasma cells. IL-17A participates in tissue inflammation by inducing the expression of chemokines, proinflammatory cytokines and matrix metalloproteases. Besides its role in host defence against infectious diseases, IL-17A is involved in different autoimmune and inflammatory diseases...
March 10, 2017: Pathology
https://www.readbyqxmd.com/read/28290616/expression-of-the-stem-cell-factor-in-fibroblasts-endothelial-cells-and-macrophages-in-periapical-tissues-in-human-chronic-periapical-diseases
#16
S Q Shen, R Wang, S G Huang
Stem cell factor (SCF), an important stem cell cytokine, has multiple functions. Fibroblasts (FBs), mature mast cells, endothelial cells (ECs), and eosinophil granulocytes can produce SCF in the inflammatory process. Therefore, we aimed to observe SCF expression in FBs, ECs, and macrophages (MPs) in periapical tissues in human chronic periapical disease and investigate the effects of cells expressing SCF in pathogenesis of the disease. Healthy (N = 20), periapical cyst (N = 15), and periapical granuloma (N = 15) tissues were fixed in 10% formalin for 48 h, embedded in paraffin, and stained with hematoxylin and eosin to observe histological changes...
March 8, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28290212/spirodela-polyrhiza-extract-modulates-the-activation-of-atopic-dermatitis-related-ion-channels-orai1-and-trpv3-and-inhibits-mast-cell-degranulation
#17
Joo Hyun Nam, Hyo Won Jung, Young-Won Chin, Won-Mo Yang, Hyo Sang Bae, Woo Kyung Kim
CONTEXT: Spirodela polyrhiza (L.) Schleid. (Lemnaceae), Spirodelae Herba (SH), has been known to relieve inflammation, urticaria and skin symptoms including pruritus, eczema and rash. OBJECTIVE: The effects of SH extract on two calcium ion channels, Orai1 and TRPV3, and their potential as novel therapeutics for atopic dermatitis (AD) were investigated. The regulatory role of Orai1 on mast cell degranulation was evaluated. MATERIALS AND METHODS: The dried leaves of SH were extracted by 70% methanol...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28289409/mitochondrial-dna-activates-the-nlrp3-inflammasome-and-predisposes-to-type-1-diabetes-in-murine-model
#18
Daniela Carlos, Frederico R C Costa, Camila A Pereira, Fernanda A Rocha, Juliana N U Yaochite, Gabriela G Oliveira, Fernando S Carneiro, Rita C Tostes, Simone G Ramos, Dario S Zamboni, Niels O S Camara, Bernhard Ryffel, João S Silva
Although a correlation between polymorphisms of NOD-like receptor family-pyrin domain containing 3 (NLRP3) and predisposition to type 1 diabetes (T1D) has been identified, the potential function and activation of the NLRP3 inflammasome in T1D have not been clarified. The present study shows that non-obese diabetic mice exhibited increased NLRP3, and pro-IL-1β gene expression in pancreatic lymph nodes (PLNs). Similar increases in gene expression of NLRP3, apoptosis associated speck like protein (ASC) and pro-IL-1β were induced by multiple low doses of streptozotocin (STZ) in C57BL/6 mice...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28288109/in-silico-design-of-novel-probes-for-the-atypical-opioid-receptor-mrgprx2
#19
Katherine Lansu, Joel Karpiak, Jing Liu, Xi-Ping Huang, John D McCorvy, Wesley K Kroeze, Tao Che, Hiroshi Nagase, Frank I Carroll, Jian Jin, Brian K Shoichet, Bryan L Roth
The primate-exclusive MRGPRX2 G protein-coupled receptor (GPCR) has been suggested to modulate pain and itch. Despite putative peptide and small-molecule MRGPRX2 agonists, selective nanomolar-potency probes have not yet been reported. To identify a MRGPRX2 probe, we first screened 5,695 small molecules and found that many opioid compounds activated MRGPRX2, including (-)- and (+)-morphine, hydrocodone, sinomenine, dextromethorphan, and the prodynorphin-derived peptides dynorphin A, dynorphin B, and α- and β-neoendorphin...
March 13, 2017: Nature Chemical Biology
https://www.readbyqxmd.com/read/28286795/systemic-mastocytosis-complicated-by-non-cirrhotic-portal-hypertension-and-variceal-bleeding
#20
Thomas R McCarty, Adelina Hung, Arpan Mohanty, John I Allen
Systemic mastocytosis is a myeloproliferative disorder characterized by extracutaneous involvement of at least one organ. Although rare, infiltration of inflammatory mast cells within the portal vein may lead to obstruction of the sinusoids resulting in non-cirrhotic portal hypertension. We present a patient with known history of systemic mastocytosis with bone marrow involvement presenting with new-onset esophageal variceal bleeding. Although systemic mastocytosis is uncommon, the subsequent development of hepatic involvement and non-cirrhotic portal hypertension are discussed...
2017: ACG Case Reports Journal
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