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Proteinase activated receptor

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https://www.readbyqxmd.com/read/29763312/deep-sea-derived-butyrolactone-i-suppresses-ovalbumin-induced-anaphylaxis-by-regulating-mast-cell-function-in-a-murine-model
#1
Qingmei Liu, Chun-Lan Xie, Yuanyuan Gao, Bo Liu, Weixiang Lin, Hong Liu, Min-Jie Cao, Wen-Jin Su, Xianwen Yang, Guang-Ming Liu
Deep-sea-derived butyrolactone I (BTL-I) which was identified as a type of butanolide was isolated from Aspergillus sp. Ovalbumin (OVA)-induced BALB/c anaphylaxis was established to explore the anti-food allergic activity of BTL-I. As results, BTL-I was able to alleviate OVA-induced allergy symptoms, reduce the levels of histamine and mouse mast cell proteinases, inhibit OVA-specific IgE, and decrease the population of mast cells in the spleen and mesenteric lymph nodes. BTL-I also significantly suppressed mast-dependent passive cutaneous anaphylaxis...
May 15, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29761522/thrombotic-characteristics-of-extracellular-vesicles-derived-from-prostate-cancer-cells
#2
Hassan A Al Saleh, Sandor Haas-Neill, Ali Al-Hashimi, Anil Kapoor, Bobby Shayegan, Richard C Austin, Khalid Al-Nedawi
BACKGROUND: Prostate cancer (PC) patients in advanced stages of the disease have high risk of blood coagulation complications. The procoagulant molecule Tissue factor (TF), and the fibrinolysis inhibitor plasminogen activator inhibitor-1 PAI-1 play important role in this complication. Extracellular vesicles (EV) shed from cancer cells may contribute to the regulation of TF and PAI-1. The procoagulant activity of EV can be associated with the oncogenic and metastatic characteristics of their cells...
May 15, 2018: Prostate
https://www.readbyqxmd.com/read/29750543/a-disintegrin-and-a-metalloproteinase-domain-8-adam8-a-novel-protective-proteinase-in-copd
#3
Francesca Polverino, Joselyn Rojas-Quintero, Xiaoyun Wang, Hans Petersen, Li Zhang, Xiaoyan Gai, Andrew Higham, Duo Zhang, Kushagra Gupta, Amit Rout, Ilyas Yambayev, Victor Pinto-Plata, Lynette M Sholl, Danen Cunoosamy, Bartolomé R Celli, James Goldring, Dave Singh, Yohannes Tesfaigzi, Jadwiga Wedzicha, Henric Olsson, Caroline A Owen
RATIONALE: A disintegrin and metalloproteinase-8 (ADAM8) is expressed by leukocytes and epithelial cells in health, but its contribution to the pathogenesis of COPD is unknown. OBJECTIVES: ADAM8 levels were measured in lung, sputum, plasma, and/or bronchoalveolar lavage fluid (BALF) samples from COPD patients, smokers, and non-smokers, and wild-type (WT) mice exposed to cigarette smoke (CS) versus air. COPD-like lung pathologies were compared in CS-exposed WT versus Adam8-/- mice...
May 11, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29734333/a-coupled-process-of-same-and-opposite-sex-mating-generates-polyploidy-and-genetic-diversity-in-candida-tropicalis
#4
Han Du, Qiushi Zheng, Jian Bing, Richard J Bennett, Guanghua Huang
Sexual reproduction is a universal mechanism for generating genetic diversity in eukaryotes. Fungi exhibit diverse strategies for sexual reproduction both in nature and in the laboratory. In this study, we report the discovery of same-sex (homothallic) mating in the human fungal pathogen Candida tropicalis. We show that same-sex mating occurs between two cells carrying the same mating type (MTLa/a or α/α) and requires the presence of pheromone from the opposite mating type as well as the receptor for this pheromone...
May 7, 2018: PLoS Genetics
https://www.readbyqxmd.com/read/29720403/urokinase-type-plasminogen-activator-upa-promotes-ezrin-mediated-reorganization-of-the-synaptic-cytoskeleton-in-the-ischemic-brain
#5
Paola Merino, Ariel Diaz, Luis Guillermo Manrique, Lihong Cheng, Manuel Yepes
Synaptic repair in the ischemic brain is a complex process that requires reorganization of the actin cytoskeleton.  Ezrin, radixin and moesin (ERM) are a group of evolutionary conserved proteins that link the plasma membrane to the actin cytoskeleton and act as scaffolds for signaling transduction.  Urokinase-type plasminogen activator (uPA) is a serine proteinase that upon binding to the urokinase-type plasminogen activator receptor (uPAR) catalyzes the conversion of plasminogen into plasmin on the cell surface and activates intracellular signaling pathways...
May 2, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29682880/activation-of-nlrp3-inflammasome-in-macrophages-by-mycoplasmal-lipoproteins-and-lipopeptides
#6
Ayumi Saeki, Masahiro Sugiyama, Akira Hasebe, Toshihiko Suzuki, Ken-Ichiro Shibata
The NLRP3 inflammasome, an intracellular sensor consisting of the NOD-like receptor family, pyrin domain containing 3 (NLRP3), the adaptor protein apoptosis-associated speck-like protein containing a caspase-recruitment domain (ASC), and procaspase-1, plays critical roles in host defense against microbial pathogens by inducing production of interleukin (IL)-1β and IL-18. Mycoplasma salivarium and Mycoplasma pneumoniae cells activated murine bone marrow-derived macrophages (BMMs) to induce production of IL-1α, IL-1β, and IL-18...
April 23, 2018: Molecular Oral Microbiology
https://www.readbyqxmd.com/read/29616048/tnfsf14-light-exhibits-inflammatory-activities-in-lung-fibroblasts-complementary-to-il-13-and-tgf-%C3%AE
#7
Ricardo da Silva Antunes, Amit K Mehta, Lisa Madge, Joel Tocker, Michael Croft
The cytokine TNFSF14 [homologous to Lymphotoxin, exhibits Inducible expression and competes with HSV Glycoprotein D for binding to HVEM, a receptor expressed on T lymphocytes (LIGHT)] has been shown in mouse models to be important for development of lung tissue remodeling that is characteristic of asthma, idiopathic pulmonary fibrosis (IPF), and systemic sclerosis (SSc). However, its cellular targets are not fully delineated. In the present report, we show that LTβR and HVEM, the receptors for LIGHT, are constitutively expressed in primary human lung fibroblasts (HLFs)...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29604205/kallikrein-related-peptidase-6-orchestrates-astrocyte-form-and-function-through-proteinase-activated-receptor-dependent-mechanisms
#8
Hyesook Yoon, Maja Radulovic, Isobel A Scarisbrick
Kallikrein-related peptidase 6 (Klk6) is the most abundant serine proteinase in the adult central nervous system (CNS), yet we know little regarding its physiological roles or mechanisms of action. Levels of Klk6 in the extracellular environment are dynamically regulated in CNS injury and disease positioning this secreted enzyme to affect cell behavior by potential receptor dependent and independent mechanisms. Here we show that recombinant Klk6 evokes increases in intracellular Ca2+ in primary astrocyte monolayer cultures through activation of proteinase activated receptor 1 (PAR1)...
March 1, 2018: Biological Chemistry
https://www.readbyqxmd.com/read/29563756/proteinase-activated-receptor-2-promotes-tumor-cell-proliferation-and-metastasis-by-inducing-epithelial-mesenchymal-transition-and-predicts-poor-prognosis-in-hepatocellular-carcinoma
#9
Liang Sun, Pi-Bao Li, Yan-Fen Yao, Ai-Yuan Xiu, Zhi Peng, Yu-Huan Bai, Yan-Jing Gao
AIM: To clarify the role of proteinase-activated receptor 2 (PAR2) in hepatocellular carcinoma, especially in the process of metastasis. METHODS: PAR2 expression levels were assessed by qRT-PCR and immunohistochemistry (IHC) in patient tissues and in hepatocellular carcinoma cell lines SMMC-7721 and HepG2. Cell proliferation and metastasis were assessed both in vitro and in vitro . Immunoblotting was carried out to monitor the levels of mitogen-activated protein kinase (MAPK) and epithelial-mesenchymal transition markers...
March 14, 2018: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29532457/heat-shock-protein-27-and-sex-selective-regulation-of-muscarinic-and-proteinase-activated-receptor-2-mediated-vasodilatation-differential-sensitivity-to-endothelial-nos-inhibition
#10
Vivek Krishna Pulakazhi Venu, Mahmoud Saifeddine, Koichiro Mihara, Mahmoud El-Daly, Darrell Belke, Jonathan L E Dean, Edward R O'Brien, Simon A Hirota, Morley D Hollenberg
BACKGROUND AND PURPOSE: Previously, we demonstrated that exogenous heat shock protein 27 (HSP27/gene, HSPB1) treatment of human endothelial progenitor cells (EPCs) increases the synthesis and secretion of VEGF, improves EPC-migration/re-endothelialization and decreases neo-intima formation, suggesting a role for HSPB1 in regulating EPC function. We hypothesized that HSPB1 also affects mature endothelial cells (ECs) to alter EC-mediated vasoreactivity in vivo. Our work focused on endothelial NOS (eNOS)/NO-dependent relaxation induced by ACh and the coagulation pathway-activated receptor, proteinase-activated receptor 2 (PAR2)...
March 12, 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29515521/gnrh-1-5-inhibits-tgf-%C3%AE-signaling-to-regulate-the-migration-of-immortalized-gonadotropin-releasing-hormone-neurons
#11
Darwin O Larco, Bradly M Bauman, Madelaine Cho-Clark, Shaila K Mani, T John Wu
Gonadotropin-releasing hormone (GnRH) neurons originate outside the central nervous system (CNS) in the nasal placode where their migration to the basal forebrain is dependent on the integration of multiple signaling cues during development. The proper migration and establishment of the GnRH neuronal population within the CNS are critical for normal pubertal onset and reproductive function. The endopeptidase EP24.15 is expressed along the migratory path of GnRH neurons and cleaves the full-length GnRH to generate the metabolite GnRH-(1-5)...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29503631/insulin-like-growth-factor-binding-protein-action-in-bone-tissue-a-key-role-for-pregnancy-associated-plasma-protein-a
#12
REVIEW
James Beattie, Hasanain Al-Khafaji, Pernille R Noer, Hanaa Esa Alkharobi, Aishah Alhodhodi, Josephine Meade, Reem El-Gendy, Claus Oxvig
The insulin-like growth factor (IGF) axis is required for the differentiation, development, and maintenance of bone tissue. Accordingly, dysregulation of this axis is associated with various skeletal pathologies including growth abnormalities and compromised bone structure. It is becoming increasingly apparent that the action of the IGF axis must be viewed holistically taking into account not just the actions of the growth factors and receptors, but also the influence of soluble high affinity IGF binding proteins (IGFBPs)...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29467851/proteinase-3-expression-on-the-neutrophils-of-patients-with-paroxysmal-nocturnal-hemoglobinuria
#13
Hui Liu, Yi Liu, Yi Li, Zhaoyun Liu, Liyan Li, Shaoxue Ding, Yihao Wang, Tian Zhang, Lijuan Li, Zonghong Shao, Rong Fu
Proteinase 3 (PR3) is released from neutrophils and regulates platelet activity, which is associated with cluster of differentiation (CD)177 antigen (NB1), a glycosylphosphatidylinositol-linked protein. In the present study, the effect of PR3 on thrombosis in paroxysmal nocturnal hemoglobinuria (PNH) and PNH-aplastic anemia (AA) syndrome was explored. The expression of PR3 and NB1 on CD59- neutrophils was detected by flow cytometry, immunofluorescence (IF), reverse transcription-quantitative polymerase chain reaction analysis and western blotting...
March 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29458120/major-role-for-trpv1-and-insp3r-in-par2-elicited-inflammatory-mediator-production-in-differentiated-human-keratinocytes
#14
Olivier Gouin, Killian L'Herondelle, Paul Buscaglia, Christelle Le Gall-Ianotto, Réginald Philippe, Nelig Legoux, Olivier Mignen, Virginie Buhé, Raphael Leschiera, Mehdi Sakka, Nathalie Kerfant, Jean-Luc Carré, Raphaele Le Garrec, Luc Lefeuvre, Nicolas Lebonvallet, Laurent Misery
PAR2 activation in basal keratinocytes stimulates inflammation via the Ca2+ -dependent production of mediators such as IL-1β, TNF-α, and TSLP. In this study, we investigated PAR2 calcium signaling and the consequent production of inflammatory mediators in differentiated human primary keratinocytes (DhPKs). Stimulation with the PAR2-activating peptide SLIGKV promoted Ca2+ store depletion in both undifferentiated human primary keratinocytes and DhPKs. SLIGKV-evoked Ca2+ store depletion did not trigger the store-operated Ca2+ entry (i...
February 17, 2018: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29453998/ctl14-a-recognition-receptor-induced-in-late-stage-larvae-modulates-anti-fungal-immunity-in-cotton-bollworm-helicoverpa-armigera
#15
Yang Cheng, Zhe Lin, Ju-Mei Wang, Long-Sheng Xing, Guang-Hua Xiong, Zhen Zou
C-type lectin (CTL) is usually considered as pattern recognition receptors in insect innate immunity. Here we found that CTL14 of Helicoverpa armigera was only activated in the fifth instar larvae not in the second instar by entomopathogen Beauveria bassiana infection. Recombinant CTL14 protein was found to form aggregates with zymosan and B. bassiana in vitro. Immunoprecipitation studies demonstrated that CTL14 interacted with serine proteinases (SP), serine proteinase inhibitor (serpin), prophenoloxidases (PPO) and vitellogenin (Vg) in the larval hemolymph...
July 2018: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/29437254/crispr-cas9-knockout-of-usp18-enhances-type-i-ifn-responsiveness-and-restricts-hiv-1-infection-in-macrophages
#16
Jared P Taylor, Melanie N Cash, Katherine E Santostefano, Mahito Nakanishi, Naohiro Terada, Mark A Wallet
The IFN-stimulated gene ubiquitin-specific proteinase 18 (USP18) encodes a protein that negatively regulates T1 IFN signaling via stearic inhibition of JAK1 recruitment to the IFN-α receptor 2 subunit (IFNAR2). Here, we demonstrate that USP18 expression is induced by HIV-1 in a T1 IFN-dependent manner. Experimental depletion of USP18 by clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein 9 (Cas9) gene editing results in a significant restriction of HIV-1 replication in an induced pluripotent stem cell (iPSC)-derived macrophage model...
February 13, 2018: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/29431207/role-of-mast-cells-and-basophils-in-pruritus
#17
REVIEW
Martin Steinhoff, Jörg Buddenkotte, Ethan A Lerner
To protect our body systems, there is a constant interactive conversation between the skin nervous and immune system. Important elements of this conversation in the skin include mast cells, basophils, and sensory nerve fibers. These cells employ a vast array of sensors that detect danger and react accordingly. This reaction, summarized as neurogenic inflammation, manifests at the conscious level as sensations including pain and itch. Here we provide a perspective on the blossoming knowledge that is illuminating connections between mast cells, basophils, and sensory nerve fibers in the mediation of itch...
March 2018: Immunological Reviews
https://www.readbyqxmd.com/read/29427987/advances-and-evolving-concepts-in-allergic-asthma
#18
Hui-Ying Tung, Evan Li, Cameron Landers, An Nguyen, Farrah Kheradmand, J Morgan Knight, David B Corry
Allergic asthma is a heterogeneous disorder that defies a unanimously acceptable definition, but is generally recognized through its highly characteristic clinical expression of dyspnea and cough accompanied by clinical data that document reversible or exaggerated airway constriction and obstruction. The generally rising prevalence of asthma in highly industrialized societies despite significant therapeutic advances suggests that the fundamental cause(s) of asthma remain poorly understood. Detailed analyses of both the indoor (built) and outdoor environments continue to support the concept that not only inhaled particulates, especially carbon-based particulate pollution, pollens, and fungal elements, but also many noxious gases and chemicals, especially biologically derived byproducts such as proteinases, are essential to asthma pathogenesis...
February 2018: Seminars in Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29422234/an-overview-of-type-2-diabetes-and-importance-of-vitamin-d3-vitamin-d-receptor-interaction-in-pancreatic-%C3%AE-cells
#19
REVIEW
Abraham Neelankal John, Fang-Xu Jiang
One significant health issue that plagues contemporary society is that of Type 2 diabetes (T2D). This disease is characterised by higher-than-average blood glucose levels as a result of a combination of insulin resistance and insufficient insulin secretions from the β-cells of pancreatic islets of Langerhans. Previous developmental research into the pancreas has identified how early precursor genes of pancreatic β-cells, such as Cpal, Ngn3, NeuroD, Ptf1a, and cMyc, play an essential role in the differentiation of these cells...
April 2018: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/29416766/cell-surface-expression-of-nucleolin-mediates-the-antiangiogenic-and-antitumor-activities-of-kallistatin
#20
Xiao-Ping Huang, Xiao Wang, Xiao-Lan Xie, Gao-Ping Zhang, Feng-Jiao Lv, Wen-Ting Weng, Fei Qiu, Zhao-Fa Li, Jun-Sheng Lin, Yong Diao
Kallistatin is a unique serine proteinase inhibitor and heparin-binding protein. A previous study conducted by our group indicated that kallistatin has antiangiogenic and antitumoral activities. In the present study, we report that kallistatin specifically binds to membrane surface-expressed nucleolin with high affinity. Antibody-mediated neutralization or siRNA-induced nucleolin knockdown results in loss of kallistatin suppression of endothelial cell proliferation and migration in vitro and tumor angiogenesis and growth in vivo ...
January 5, 2018: Oncotarget
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