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https://www.readbyqxmd.com/read/28426164/protease-activated-receptor-2-suppresses-interleukin-il-10-expression-in-b-cells-via-up-regulating-bcl2l12-in-patients-with-allergic-rhinitis
#1
Jin-Mei Xue, Li-Tao Yang, Gui Yang, Xiao-Rui Geng, Zhi-Qiang Liu, Shuai Wang, Hai-Liang Zhao, Zhi-Gang Liu, Chang-Qing Zhao, Ping-Chang Yang
BACKGROUND AND AIMS: The function of interleukin (IL)-10 producing B cells (B10 cell) is compromised in patients with allergic diseases. Protease-activated receptor (PAR)-2 has immune regulatory functions. This study aims to elucidate the role of PAR2 in the suppression of IL-10 expression in peripheral B cells. METHODS: Peripheral blood B cells were collected from patients with allergic rhinitis (AR). A correlation between the expression of Bcl2 like protein 12 (Bcl2L12) and IL-10 in the B cells was analyzed...
April 20, 2017: Allergy
https://www.readbyqxmd.com/read/28418856/low-density-lipoprotein-receptor-related-protein-6-is-a-novel-coreceptor-of-protease-activated-receptor-2-in-the-dynamics-of-cancer-associated-%C3%AE-catenin-stabilization
#2
Jeetendra Kumar Nag, Arun Kancharla, Myriam Maoz, Hagit Turm, Daniel Agranovich, Chhedi Lal Gupta, Beatrice Uziely, Rachel Bar-Shavit
Protease-activated receptor-2 (PAR2) plays a central role in cancer; however, the molecular machinery of PAR2-instigated tumors remains to be elucidated. We show that PAR2 is a potent inducer of β-catenin stabilization, a core process in cancer biology, leading to its transcriptional activity. Novel association of low-density lipoprotein-related protein 6 (LRP6), a known coreceptor of Frizzleds (Fz), with PAR2 takes place following PAR2 activation. The association between PAR2 and LRP6 was demonstrated employing co-immunoprecipitation, bioluminescence resonance energy transfer (BRET), and confocal microscopy analysis...
March 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28389775/erratum-to-sensitisation-of-trpv4-by-par2-is-independent-of-intracellular-calcium-signalling-and-can-be-mediated-by-the-biased-agonist-neutrophil-elastase
#3
Silvia Sostegni, Alexei Diakov, Peter McIntyre, Nigel Bunnett, Christoph Korbmacher, Silke Haerteis
No abstract text is available yet for this article.
April 7, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28381109/-express-prostanoid-dependent-spontaneous-pain-and-par2-dependent-mechanical-allodynia-following-oral-mucosal-trauma-involvement-of-trpv1-trpa1-and-trpv4
#4
Misa Ito, Kentaro Ono, Suzuro Hitomi, Tomotaka Nodai, Teppei Sago, Kiichiro Yamaguchi, Nozomu Harano, Kaori Gunnjigake, Ryuji Hosokawa, Tatsuo Kawamoto, Kiyotoshi Inenaga
No abstract text is available yet for this article.
January 2017: Molecular Pain
https://www.readbyqxmd.com/read/28374503/tryptase-potentiates-enteric-nerve-activation-by-histamine-and-serotonin-relevance-for-the-effects-of-mucosal-biopsy-supernatants-from-irritable-bowel-syndrome-patients
#5
D Ostertag, A Annahazi, D Krueger, K Michel, I E Demir, G O Ceyhan, F Zeller, M Schemann
BACKGROUND: We previously showed that mucosal biopsy supernatants from irritable bowel syndrome patients activated neurons despite low concentrations of tryptase, histamine, and serotonin which individually would not cause spike discharge. We studied the potentiating responses between these mediators on excitability of enteric neurons. METHODS: Calcium-imaging was performed using the calcium-sensitive dye Fluo-4 AM in human submucous plexus preparations from 45 individuals...
April 4, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28349651/dermasence-refining-gel-modulates-pathogenetic-factors-of-rosacea-in-vitro
#6
C Borelli, B Becker, S Thude, B Fehrenbacher, D Isermann
BACKGROUND: Over the counter cosmetics sold for local treatment of slight to moderate rosacea often state the claim of actively modulating rosacea pathogenesis. Factors involved in the pathogenesis of this common yet complex skin disorder include kallikrein-related peptidase 5 (KLK5), LL-37, as well as protease-activated receptor 2 (PAR2) and vascular endothelial growth factor (VEGF). OBJECTIVE: The objective was to prove the modulating effect of the cosmetic skin care agent Dermasence Refining Gel (DRG) on factors involved in rosacea pathogenesis...
March 27, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28323866/elevated-fecal-peptidase-d-at-onset-of-colitis-in-galphai2-mice-a-mouse-model-of-ibd
#7
Daniel Bergemalm, Robert Kruse, Maria Sapnara, Jonas Halfvarson, Elisabeth Hultgren Hörnquist
BACKGROUND: The identification of novel fecal biomarkers in inflammatory bowel disease (IBD) is hampered by the complexity of the human fecal proteome. On the other hand, in experimental mouse models there is probably less variation. We investigated the fecal protein content in mice to identify possible biomarkers and pathogenic mechanisms. METHODS: Fecal samples were collected at onset of inflammation in Galphai2-/- mice, a well-described spontaneous model of chronic colitis, and from healthy littermates...
2017: PloS One
https://www.readbyqxmd.com/read/28317204/cockroach-allergen-serine-proteinases-isolation-sequencing-and-signalling-via-proteinase-activated-receptor-2-par2
#8
Danny J Polley, Koichiro Mihara, Rithwik Ramachandran, Harissios Vliagoftis, Bernard Renaux, Mahmoud Saifeddine, Michael O Daines, Scott Boitano, Morley D Hollenberg
BACKGROUND: Allergy to the German cockroach (Blattella germanica) is a significant asthma risk factor for inner-city communities. Cockroach, like other allergens, contains trypsin-like enzyme activity that contributes to allergenicity and airway inflammation by activating proteinase-activated receptors (PARs). To date, the enzymes responsible for the proteolytic activity of German cockroach allergen have not been characterized. OBJECTIVES: We aimed to identify, isolate and characterize the trypsin-like proteinases in German cockroach allergen extracts used for clinical skin tests...
March 20, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28303089/protease-activated-receptor-2-par2-induces-long-term-depression-in-the-hippocampus-through-transient-receptor-potential-vanilloid-4-trpv4
#9
Efrat Shavit-Stein, Avital Artan-Furman, Ekaterina Feingold, Marina Ben Shimon, Zeev Itzekson-Hayosh, Joab Chapman, Andreas Vlachos, Nicola Maggio
Protease activated receptors (PARs) are involved in regulating synaptic transmission and plasticity in the brain. While it is well-accepted that PAR1 mediates long-term potentiation (LTP) of excitatory synaptic strength, the role of PAR2 in synaptic plasticity remains not well-understood. In this study, we assessed the role of PAR2-signaling in plasticity at hippocampal Schaffer collateral-CA1 synapses. Using field potential recordings, we report that PAR2-activation leads to long-term depression (LTD) of synaptic transmission through a protein kinase A -dependent, Transient Receptor Potential Vanilloid 4 -mediated mechanism, which requires the activation of N-methyl-D-aspartate receptors...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28245472/role-of-protease-activated-receptor-2-in-regulating-focal-segmental-glomerulosclerosis
#10
Yongjun Wang, Yanfa He, Mingzheng Wang, Pei Lv, Jianzhen Liu, Junxia Wang
Background /Aims: The underlying mechanisms leading to focal segmental glomerulosclerosis (FSGS) are lacking. In this report, we examined the role of protease-activated receptors (PARs) subtype PAR2 and its downstream signals in regulating the pathophysiological process of FSGS. METHODS: Nephropathy was induced by intravenous injections of adriamycin (ADR) in rats to study FSGS. Western Blot analysis and ELISA were employed to determine the protein expression levels of PAR2 and its downstream signal pathways as well as the levels of PICs...
February 28, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28245465/astragaloside-alleviates-hepatic-fibrosis-function-via-par2-signaling-pathway-in-diabetic-rats
#11
Zhenchang Wang, Quanqiang Li, Mingpeng Xiang, Fengying Zhang, Dongyu Wei, Zhixi Wen, Ying Zhou
BACKGROUND/AIMS: Astragaloside (AGS) extracted from radix astragalin (Huangqi) has been considered to be beneficial to liver diseases. In this study, we examined the role played by AGS in alleviating hepatic fibrosis function via protease-activated receptor-2 (PAR2) mechanisms. We hypothesized that AGS affects PAR2 signaling pathway thereby improving hepatic function in rats with hepatic fibrosis induced by carbon tetrachloride (CCl4). We further hypothesized that AGS attenuates impaired hepatic function evoked by CCl4 to a greater degree in diabetic animals...
February 28, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28238749/persistent-kallikrein-5-activation-induces-atopic-dermatitis-like-skin-architecture-independent-of-par2-activity
#12
Yanan Zhu, Joanne Underwood, Derek Macmillan, Leila Shariff, Ryan O'Shaughnessy, John I Harper, Chris Pickard, Peter S Friedmann, Eugene Healy, Wei-Li Di
BACKGROUND: Upregulation of kallikreins (KLKs) including KLK5 has been reported in atopic dermatitis (AD). KLK5 has biological functions that include degrading desmosomal proteins and inducing proinflammatory cytokine secretion through protease-activated receptor 2 (PAR2). However, due to the complex interactions between various cells in AD inflamed skin, it is difficult to dissect the precise and multiple roles of upregulated KLK5 in AD skin. OBJECTIVE: We investigated the effect of upregulated KLK5 on the expression of epidermal-related proteins and cytokines in keratinocytes and on skin architecture...
February 24, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28223242/fviia-prevents-the-progressive-hemorrhaging-of-a-brain-contusion-by-protecting-microvessels-via-formation-of-the-tf-fviia-fxa-complex
#13
Qiang Yuan, Dalong Zhang, Sirong Wu, Jian Yu, Lei Yu, Yirui Sun, Zhuoying Du, Zhiqi Li, Liangfu Zhou, Xing Wu, Jin Hu
Factor VII (FVII) plays a key role in the initiation of the coagulation cascade and, in clinical situations, recombinant human activated FVII (rFVIIa) effectively prevents progressive hemorrhaging after a brain contusion. However, it remains unclear whether decreases in FVII activity directly lead to progressive hemorrhaging and, moreover, the precise mechanisms underlying this process are not yet known. The present study demonstrated that decreased FVII activity directly led to progressive hemorrhaging of the cerebral contusions...
February 20, 2017: Neuroscience
https://www.readbyqxmd.com/read/28191683/immediate-type-allergic-and-protease-mediated-reactions-are-involved-in-scratching-behavior-induced-by-topical-application-of-dermatophagoides-farinae-extract-in-nc-nga-mice
#14
Yoshihito Yamada, Yuhki Ueda, Aki Nakamura, Shoji Kanayama, Rie Tamura, Kei Hashimoto, Tatsumi Matsumoto, Ritsuko Ishii
Atopic dermatitis (AD)-like dermatitis can be induced by repeated topical application of an ointment containing Dermatophagoides farinae body (Dfb) extract in NC/Nga mice. This AD-like murine model also exhibits a biphasic increase in the number of scratching behavior after topical application of Dfb ointment. In this study, we investigated the possible mechanisms underlying the scratching behavior in each phase. An increase in the content of mast cell derived mediators such as histamine and 5-hydroxytryptamine in the lesional skin and increased vascular permeability were observed in the early phase after the Dfb ointment application...
February 13, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/28184250/meiotic-outcome-in-two-carriers-of-y-autosome-reciprocal-translocations-selective-elimination-of-certain-segregants
#15
Harita Ghevaria, Roy Naja, Sioban SenGupta, Paul Serhal, Joy Delhanty
BACKGROUND: Reciprocal Y autosome translocations are rare but frequently associated with male infertility. We report on the meiotic outcome in embryos fathered by two males with the karyotypes 46,X,t(Y;4)(q12;p15.32) and 46,X,t(Y;16)(q12;q13). The two couples underwent preimplantation genetic diagnosis (PGD) enabling determination of the segregation types that were compatible with fertilization and preimplantation embryo development. Both PGD and follow up analysis were carried out via fluorescence in situ hybridization (FISH) or array comparative genomic hybridization (aCGH) allowing the meiotic segregation types to be determined in a total of 27 embryos...
2017: Molecular Cytogenetics
https://www.readbyqxmd.com/read/28169521/biased-signaling-by-agonists-of-protease-activated-receptor-2
#16
Yuhong Jiang, Mei-Kwan Yau, W Mei Kok, Junxian Lim, Kai-Chen Wu, Ligong Liu, Timothy A Hill, Jacky Y Suen, David P Fairlie
Protease activated receptor 2 (PAR2) is associated with metabolism, obesity, inflammatory, respiratory and gastrointestinal disorders, pain, cancer, and other diseases. The extracellular N-terminus of PAR2 is a common target for multiple proteases, which cleave it at different sites to generate different N-termini that activate different PAR2-mediated intracellular signaling pathways. There are no synthetic PAR2 ligands that reproduce the same signaling profiles and potencies as proteases. Structure-activity relationships here for 26 compounds spanned a signaling bias over 3 log units, culminating in three small ligands as biased agonist tools for interrogating PAR2 functions...
March 14, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28162529/-292-protease-activated-receptor-2-par2-is-a-mediator-of-nociception-in-a-mouse-model-of-migraine
#17
S Hassler, T Price, G Dussor, S Boitano, J Vagner
No abstract text is available yet for this article.
April 2016: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/28120492/the-role-of-toll-like-and-protease-activated-receptors-and-associated-intracellular-signaling-in-porphyromonas-gingivalis-infected-gingival-fibroblasts
#18
Eleonor Palm, Isak Demirel, Torbjörn Bengtsson, Hazem Khalaf
Porphyromonas gingivalis, which is considered a keystone agent in periodontitis, has evolved elaborate mechanisms to grow and survive in a hostile milieu. The gingival fibroblast is the major cell type in the gingiva and is considered to be important in the periodontitis-associated inflammation. As a part of the innate immune response, they produce cytokines such as CXCL8 and interleukin (IL)-6 which are believed to contribute to the destruction of the tooth-supporting tissues. This study investigates how the expression of protease-activated receptors (PAR1, PAR2) and toll-like receptors (TLR2, TLR4) changes with P...
February 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28116092/teleocidin-a2-inhibits-human-proteinase-activated-receptor-2-signaling-in-tumor-cells
#19
Sonja Stahn, Lisa Thelen, Ina-Maria Albrecht, Jens Bitzer, Thomas Henkel, Nicole Elisabeth Teusch
Enhanced expression of the proteinase-activated receptor 2 (PAR2) is linked to cell proliferation and migration in many cancer cell types. The role of PAR2 in cancer progression strongly illustrates the need for PAR2-inhibiting compounds. However, to date, potent and selective PAR2 antagonists have not been reported. The natural product teleocidin A2 was characterized against PAR2-activating peptide SLIGKV-NH 2, and trypsin-induced PAR2-dependent intracellular Ca(2+) mobilization in tumor and in primary endothelial or epithelial cells...
August 2016: Pharmacology Research & Perspectives
https://www.readbyqxmd.com/read/28109095/-establishment-of-a-sd-rat-model-of-vulvar-lichen-simplex-chronicus-and-detection-of-the-expression-of-protease-activated-receptor-2
#20
Huan Yang, Zhen-Hua Fu, Hua-Jun Tang, Cheng-Zhi Li
OBJECTIVE: To establish a SD rat model of vulvar lichen simplex chronicus (LSC) and investigate the expression of protease activated receptor 2 (PAR2) in the genital skin. METHODS: Seventy female SD rats were randomly divided into group A (blank control group, n=10), group B (with application of acetone solution 3 times per week for 10 weeks, n=10), group C (with chronic mechanical irritation 3 times per week for 10 weeks, n=10), and group D (with topical treatment with 0...
January 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
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