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https://www.readbyqxmd.com/read/27896225/the-urokinase-urokinase-receptor-system-in-mast-cells-effects-of-its-functional-interaction-with-fmlf-receptors
#1
Francesca Wanda Rossi, Nella Prevete, Felice Rivellese, Filomena Napolitano, Nunzia Montuori, Loredana Postiglione, Carmine Selleri, Amato de Paulis
Mast cell and basophils express the high affinity receptor for IgE (FcɛRI) and are primary effector cells of allergic disorders. The urokinase (uPA)-mediated plasminogen activation system is involved in physiological and pathological events based on cell migration and tissue remodelling, such as inflammation, wound healing, angiogenesis and metastasis. uPA is a serine protease that binds uPAR, a high affinity glycosyl-phosphatidyl-inositol (GPI)-anchored receptor. uPAR focuses uPA activity at the cell surface and activates intracellular signaling through lateral interactions with integrins, receptor tyrosine kinases and the G-protein-coupled family of fMLF chemotaxis receptors (FPRs)...
November 2016: Translational Medicine @ UniSa
https://www.readbyqxmd.com/read/27889928/elucidating-the-role-of-cyclooxygenase-2-in-the-pathogenesis-of-oral-lichen-planus-an-immunohistochemical-study-with-supportive-histochemical-analysis
#2
Pratyush Singh, Jasleen Grover, Aditi Amit Byatnal, Vasudeva Guddattu, Raghu Radhakrishnan, Monica Charlotte Solomon
OBJECTIVE: Oral lichen planus (OLP) is a chronic, inflammatory disorder that affects the oral mucous membrane. During an inflammatory response, several chemokines and cytokines are released by the cells of the immune system. Activation of MMPs, along with mast cell-derived chymase and tryptase, degrades the basement membrane structural proteins, resulting in basement membrane breaks. AIM: To investigate the association between the COX-2 expressions, presence of intact or degranulating mast cells within the connective tissue and the extent of basement membrane discontinuity in OLP cases...
November 7, 2016: Journal of Oral Pathology & Medicine
https://www.readbyqxmd.com/read/27834692/factor-xii-as-a-therapeutic-target-in-thromboembolic-and-inflammatory-diseases
#3
REVIEW
Katrin F Nickel, Andy T Long, Tobias A Fuchs, Lynn M Butler, Thomas Renné
Coagulation factor XII (FXII, Hageman factor) is a plasma protease that in its active form (FXIIa) initiates the procoagulant and proinflammatory contact system. This name arises from FXII's unique mechanism of activation that is induced by binding (contact) to negatively charged surfaces. Various substances have the capacity to trigger FXII contact-activation in vivo including mast cell-derived heparin, misfolded protein aggregates, collagen, nucleic acids, and polyphosphate. FXII deficiency is not associated with bleeding, and for decades, the factor was considered to be dispensable for coagulation in vivo...
November 10, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/27822310/anaphylactic-shock-during-cement-implantation-of-a-total-hip-arthroplasty-in-a-patient-with-underlying-mastocytosis-case-report-of-a-rare-intraoperative-complication
#4
Anita Ten Hagen, Pieter Doldersum, Tom van Raaij
BACKGROUND: Cemented total hip arthroplasty (THA) is a safe and common procedure. In rare cases life threatening bone cement implantation syndrome (BCIS) may occur, which is commonly caused by pulmonary embolism (PE). CASE PRESENTATION: We describe the rare case of a 70-year old patient who underwent an elective total hip replacement. Before surgery he was diagnosed with underlying systemic indolent mastocytosis, a rare pathological disorder that may result in anaphylaxis after massive systemic mast cell activation...
2016: Patient Safety in Surgery
https://www.readbyqxmd.com/read/27786273/the-nedd4-2-ndfip1-axis-is-a-negative-regulator-of-ige-mediated-mast-cell-activation
#5
Kwok Ho Yip, Natasha Kolesnikoff, Nicholas Hauschild, Lisa Biggs, Angel F Lopez, Stephen J Galli, Sharad Kumar, Michele A Grimbaldeston
Cross-linkage of the high-affinity immunoglobulin E (IgE) receptor (FcɛRI) on mast cells by antigen ligation has a critical role in the pathology of IgE-dependent allergic disorders, such as anaphylaxis and asthma. Restraint of intracellular signal transduction pathways that promote release of mast cell-derived pro-inflammatory mediators is necessary to dampen activation and restore homoeostasis. Here we show that the ligase Nedd4-2 and the adaptor Ndfip1 (Nedd4 family interacting protein 1) limit the intensity and duration of IgE-FcɛRI-induced positive signal transduction by ubiquitinating phosphorylated Syk, a tyrosine kinase that is indispensable for downstream FcɛRI signalosome activity...
October 27, 2016: Nature Communications
https://www.readbyqxmd.com/read/27779084/mast-cell-disorders-in-drug-hypersensitivity
#6
Patrizia Bonadonna, Massimiliano Bonifacio, Roberta Zanotti
Mastocytosis is a clonal disease characterized by proliferation and accumulation of mast cells (MC) in different tissues, preferentially skin and bone marrow, leading to a wide variety of clinical manifestations, mainly caused by the inappropriate release of MC mediators. As a consequence, patients with mastocytosis may experience symptoms due to massive MC activation and release of mediators. Anaphylaxis is the most frequent manifestation of this phenomenon.Drugs are possible triggers of anaphylaxis in patients with mastocytosis, even though the association between mastocytosis and drug anaphylaxis does not appear to be as strong as anaphylaxis after hymenoptera sting; nevertheless, MC disorders might be ruled out in cases of severe systemic reactions to drugs...
September 28, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27758758/effects-of-rupatadine-on-platelet-activating-factor-paf-induced-human-mast-cell-degranulation-compared-with-desloratadine-and-levocetirizine-the-maspaf-study
#7
R Muñoz-Cano, E Ainsua-Enrich, I Torres-Atencio, M Martin, J Sánchez-Lopez, J Bartra, C Picado, J Mullol, A Valero
RATIONALE: Platelet activating factor (PAF) is a lipid mediator involved in the pathophysiology of several allergic diseases, such as the amplification of mast cell (MC) activation in anaphylaxis. Rupatadine is an antihistamine with demonstrated anti-PAF effect but its capacity to inhibit PAF-induced MC degranulation has not been fully evaluated. OBJECTIVE: To investigate the ability of rupatadine to inhibit PAF-induced MC degranulation compared with desloratadine and levocetirizine, to confirm dual rupatadine anti-H1 and anti-PAF activities...
October 19, 2016: Journal of Investigational Allergology & Clinical Immunology
https://www.readbyqxmd.com/read/27738395/current-approach-to-cutaneous-mastocytosis-in-childhood
#8
REVIEW
Zeynep Tamay, Deniz Özçeker
Mastocytosis is a heterogeneous disorder characterized by clonal proliferation and accumulation of mast cells in one of more organs which may lead to different clinical pictures. Pathological increase and activation of mast cells in various tissues can cause different clinical pictures. Cutaneous mastocytosis limited to the skin is the most typical clinical picture observed in children and systemic mastocytosis is very rare in the pediatric age group. The diagnosis of cutaneous mastocytosis is based on clinical findings, but is often delayed due to lack of clinical awareness of the disease and lack of its consideration in the differential diagnosis...
September 2016: Türk Pediatri Arşivi
https://www.readbyqxmd.com/read/27708358/increased-duodenal-eosinophil-degranulation-in-patients-with-functional-dyspepsia-a-prospective-study
#9
Lijun Du, Jinhua Shen, John J Kim, Yunxian Yu, Liqin Ma, Ning Dai
Functional dyspepsia (FD) is a functional gastrointestinal disorder diagnosed by symptom-based criteria. It has been said that duodenal immune activation plays a role in the pathogenesis of FD. The primary aims of the study were to compare the total number of duodenal eosinophil and evaluate the eosinophil degranulation rate, number of duodenal degranulated eosinophil and mast cell between patients with FD and healthy subjects. We enrolled 96 patients with FD and 24 healthy controls at Sir Run Run Shaw Hospital...
October 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27701827/beneficial-effects-of-co-ultramicronized-palmitoylethanolamide-luteolin-in-a-mouse-model-of-autism-and-in-a-case-report-of-autism
#10
Bartolomeo Bertolino, Rosalia Crupi, Daniela Impellizzeri, Giuseppe Bruschetta, Marika Cordaro, Rosalba Siracusa, Emanuela Esposito, Salvatore Cuzzocrea
AIMS: Autism spectrum disorder (ASD) is a condition defined by social communication deficits and repetitive restrictive behaviors. Association of the fatty acid amide palmitoylethanolamide (PEA) with the flavonoid luteolin displays neuroprotective and antiinflammatory actions in different models of central nervous system pathologies. We hypothesized that association of PEA with luteolin might have therapeutic utility in ASD, and we employed a well-recognized autism animal model, namely sodium valproate administration, to evaluate cognitive and motor deficits...
October 4, 2016: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/27694038/targeting-mast-cells-uncovering-prolific-therapeutic-role-in-myriad-diseases
#11
Jatinder Singh, Ramanpreet Shah, Dhandeep Singh
The mast cells are integral part of immune system and they have pleiotropic physiological functions in our body. Any type of abnormal stimuli causes the mast cells receptors to spur the otherwise innocuous mast cells to degranulate and release inflammatory mediators like histamine, cytokines, chemokines and prostaglandins. These mediators are involved in various diseases like allergy, asthma, mastocytosis, cardiovascular disorders, etc. Herein, we describe the receptors involved in degranulation of mast cells and are broadly divided into four categories: G-protein coupled receptors, ligand gated ion channels, immunoreceptors and pattern recognition receptors...
September 29, 2016: International Immunopharmacology
https://www.readbyqxmd.com/read/27640900/dietary-interventions-that-reduce-mtor-activity-rescue-autistic-like-behavioral-deficits-in-mice
#12
Jiangbo Wu, Caroline G M de Theije, Sofia Lopes da Silva, Suzanne Abbring, Hilma van der Horst, Laus M Broersen, Linette Willemsen, Martien Kas, Johan Garssen, Aletta D Kraneveld
Enhanced mammalian target of rapamycin (mTOR) signaling in the brain has been implicated in the pathogenesis of autism spectrum disorder (ASD). Inhibition of the mTOR pathway improves behavior and neuropathology in mouse models of ASD containing mTOR-associated single gene mutations. The current study demonstrated that the amino acids histidine, lysine, threonine inhibited mTOR signaling and IgE-mediated mast cell activation, while the amino acids leucine, isoleucine, valine had no effect on mTOR signaling in BMMCs...
September 15, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27636508/atractylone-an-active-constituent-of-kmp6-attenuates-allergic-inflammation-on-allergic-rhinitis-in-vitro-and-in-vivo-models
#13
Hee-Yun Kim, Sun-Young Nam, Sung-Yeoun Hwang, Hyung-Min Kim, Hyun-Ja Jeong
KMP6 (Pyeongwee-San) is a Korean Medicine used to treat gastrointestinal disorders. Recently, we reported KMP6 had beneficial effects on allergic inflammatory diseases. The aim of this study was to evaluate the effects of atractylone (Atr), a constituent of KMP6, on allergic rhinitis (AR) and to identify the mechanism responsible for these effects. The anti-allergic inflammatory effects of Atr were evaluated on phorbol 12-myristate 13-acetate and calcium ionophore A23187 (PMACI)-stimulated human mast cell line, HMC-1 cells and in an ovalbumin (OVA)-induced AR animal model using Western blotting, quantitative real-time PCR, ELISA, and immunohistochemistry methods...
October 2016: Molecular Immunology
https://www.readbyqxmd.com/read/27619994/mast-cell-degranulation-is-accompanied-by-the-release-of-a-selective-subset-of-extracellular-vesicles-that-contain-mast-cell-specific-proteases
#14
Tom Groot Kormelink, Ger J A Arkesteijn, Chris H A van de Lest, Willie J C Geerts, Soenita S Goerdayal, Maarten A F Altelaar, Frank A Redegeld, Esther N M Nolte-'t Hoen, Marca H M Wauben
Mast cells (MC) are well known for their effector role in allergic disorders; moreover, they are associated with diverse modulatory effects in innate and adaptive immunity. It is largely unclear how MC exert these modulating functions. In this article, we show that IgE-mediated MC degranulation leads to a rapid release of high quantities of extracellular vesicles (EV), comparable to the release of preformed mediators. EV are submicron structures composed of lipid bilayers, proteins, and nucleic acids that are released by cells in a regulated fashion and are involved in intercellular communication...
September 12, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27611333/regulation-of-reactive-oxygen-species-and-the-antioxidant-protein-dj-1-in-mastocytosis
#15
Do-Kyun Kim, Michael A Beaven, Joseph M Kulinski, Avanti Desai, Geethani Bandara, Yun Bai, Calman Prussin, Lawrence B Schwartz, Hirsh Komarow, Dean D Metcalfe, Ana Olivera
Neoplastic accumulation of mast cells in systemic mastocytosis (SM) associates with activating mutations in the receptor tyrosine kinase KIT. Constitutive activation of tyrosine kinase oncogenes has been linked to imbalances in oxidant/antioxidant mechanisms in other myeloproliferative disorders. However, the impact of KIT mutations on the redox status in SM and the potential therapeutic implications are not well understood. Here, we examined the regulation of reactive oxygen species (ROS) and of the antioxidant protein DJ-1 (PARK-7), which increases with cancer progression and acts to lessen oxidative damage to malignant cells, in relationship with SM severity...
2016: PloS One
https://www.readbyqxmd.com/read/27594511/regulatory-t-cells-and-il17a-cells-infiltrate-oral-lichen-planus-lesions
#16
L R Javvadi, V P B Parachuru, T J Milne, G J Seymour, A M Rich
Oral lichen planus (OLP) is a complex immunological disorder, mediated in part by the release of cytokines from activated T-cells. Of late, two closely related T-helper (Th) cell subsets; regulatory T-cells (Tregs; FoxP3(+)) and Th17 cells (IL17(+)) have been described in various chronic inflammatory diseases. The aim of this study was to determine the expression of FoxP3 and IL17 in OLP using immunohistochemistry (IHC) and quantitative real-time reverse transcriptase polymerase chain reaction (qPCR). For IHC, formalin fixed, paraffin embedded archival specimens, an OLP group (n=10) and a non-specific inflammatory (NSI) control group (n=9) were used...
October 2016: Pathology
https://www.readbyqxmd.com/read/27545031/-associations-of-sigmoid-colon-mucosal-mast-cells-with-bowel-symptoms-and-psychological-status-in-patients-with-irritable-bowel-syndrome-with-diarrhea
#17
D Xu, W Chen, W X Zhou, C D Wang, G J Fei, L M Zhu, H W Xin, D R Zhong, G Sun, X C Fang
OBJECTIVE: To investigate the bowel symptoms and psychological status of patients with irritable bowel syndrome (IBS) with diarrhea (IBS-D), and to verify whether sigmoid colon mucosal mast cells (MCs) and their activation have effect on the symptoms and psychological status of IBS-D patients. METHODS: Patients meeting Rome Ⅲ diagnostic and subtyping criteria of IBS-D who visited the outpatient clinic of gastroenterology of Peking Union Medical College Hospital were consecutively enrolled between July 2009 and June 2012...
August 9, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/27496752/role-of-interleukin-18-in-the-pathophysiology-of-allergic-diseases
#18
Nathan L Sanders, Anil Mishra
Interleukin (IL)-18 is an IL-1 family cytokine expressed by macrophages, dendritic cells, epithelial cells, and keratinocytes and is implicated in various aspects of both the innate and adaptive immune systems. IL-18 signals similar to IL-1β intracellularly to activate gene transcription. Since its discovery, IL-18 has been demonstrated to play a key role in pathogen defense from helminths and some bacteria. Recently however, evidence has accumulated that IL-18 expression is increased in many presentations of allergic disease...
December 2016: Cytokine & Growth Factor Reviews
https://www.readbyqxmd.com/read/27459687/immunophenotypic-and-ultrastructural-analysis-of-mast-cells-in-hermansky-pudlak-syndrome-type-1-a-possible-connection-to-pulmonary-fibrosis
#19
Arnold S Kirshenbaum, Glenn Cruse, Avanti Desai, Geethani Bandara, Maarten Leerkes, Chyi-Chia R Lee, Elizabeth R Fischer, Kevin J O'Brien, Bernadette R Gochuico, Kelly Stone, William A Gahl, Dean D Metcalfe
Hermansky-Pudlak Syndrome type-1 (HPS-1) is an autosomal recessive disorder caused by mutations in HPS1 which result in reduced expression of the HPS-1 protein, defective lysosome-related organelle (LRO) transport and absence of platelet delta granules. Patients with HPS-1 exhibit oculocutaneous albinism, colitis, bleeding and pulmonary fibrosis postulated to result from a dysregulated immune response. The effect of the HPS1 mutation on human mast cells (HuMCs) is unknown. Since HuMC granules classify as LROs along with platelet granules and melanosomes, we set out to determine if HPS-1 cutaneous and CD34+ culture-derived HuMCs have distinct granular and cellular characteristics...
2016: PloS One
https://www.readbyqxmd.com/read/27448446/roles-of-mas-related-g-protein-coupled-receptor-x2-on-mast-cell-mediated-host-defense-pseudoallergic-drug-reactions-and-chronic-inflammatory-diseases
#20
REVIEW
Hariharan Subramanian, Kshitij Gupta, Hydar Ali
Mast cells (MCs), which are granulated tissue-resident cells of hematopoietic lineage, contribute to vascular homeostasis, innate/adaptive immunity, and wound healing. However, MCs are best known for their roles in allergic and inflammatory diseases, such as anaphylaxis, food allergy, rhinitis, itch, urticaria, atopic dermatitis, and asthma. In addition to the high-affinity IgE receptor (FcεRI), MCs express numerous G protein-coupled receptors (GPCRs), which are the largest group of membrane receptor proteins and the most common targets of drug therapy...
September 2016: Journal of Allergy and Clinical Immunology
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