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Kinin

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https://www.readbyqxmd.com/read/29334504/bradykinin-receptors-gene-expression-in-white-adipose-tissue-in-nondiabetic-patients-with-coronary-artery-disease
#1
Maria E Marketou, George Kochiadakis, Joanna Kontaraki, Evangelos Zacharis, Emmanouel Kanoupakis, Emmanouel Kallergis, Hercules Mavrakis, Panagiotis Tsiverdis, Dimitris Lempidakis, John Konstantinou, Konstantinos Fragkiadakis, Gregory Chlouverakis, Panos Vardas, Fragiskos Parthenakis
OBJECTIVES: Adipose tissue plays a key role in cardiovascular physiology. Kinin receptors are important determinant of the effect of adiposity on endothelial function and cardiovascular function. We examined the gene expression levels of kinin receptors in the subcutaneous white adipose tissue (sWAT) of nondiabetic patients with and without coronary artery disease (CAD). PATIENTS AND METHODS: We evaluated 21 patients with CAD (13 men, age: 68±8 years) and 23 patients without CAD (15 men, age: 66±5 years) who underwent catheterization through the femoral route...
January 12, 2018: Coronary Artery Disease
https://www.readbyqxmd.com/read/29334381/the-molecular-basis-of-subtype-selectivity-of-human-kinin-g-protein-coupled-receptors
#2
Lisa Joedicke, Jiafei Mao, Georg Kuenze, Christoph Reinhart, Tejaswi Kalavacherla, Hendrik R A Jonker, Christian Richter, Harald Schwalbe, Jens Meiler, Julia Preu, Hartmut Michel, Clemens Glaubitz
G-protein-coupled receptors (GPCRs) are the most important signal transducers in higher eukaryotes. Despite considerable progress, the molecular basis of subtype-specific ligand selectivity, especially for peptide receptors, remains unknown. Here, by integrating DNP-enhanced solid-state NMR spectroscopy with advanced molecular modeling and docking, the mechanism of the subtype selectivity of human bradykinin receptors for their peptide agonists has been resolved. The conserved middle segments of the bound peptides show distinct conformations that result in different presentations of their N and C termini toward their receptors...
January 15, 2018: Nature Chemical Biology
https://www.readbyqxmd.com/read/29328364/genetically%C3%A2-modified-stem-cells-in-treatment-of-human-diseases-tissue-kallikrein-klk1-%C3%A2-based-targeted-therapy-review
#3
Marina Devetzi, Maria Goulielmaki, Nicolas Khoury, Demetrios A Spandidos, Georgia Sotiropoulou, Ioannis Christodoulou, Vassilis Zoumpourlis
The tissue kallikrein‑kinin system (KKS) is an endogenous multiprotein metabolic cascade which is implicated in the homeostasis of the cardiovascular, renal and central nervous system. Human tissue kallikrein (KLK1) is a serine protease, component of the KKS that has been demonstrated to exert pleiotropic beneficial effects in protection from tissue injury through its anti‑inflammatory, anti‑apoptotic, anti‑fibrotic and anti‑oxidative actions. Mesenchymal stem cells (MSCs) or endothelial progenitor cells (EPCs) constitute populations of well‑characterized, readily obtainable multipotent cells with special immunomodulatory, migratory and paracrine properties rendering them appealing potential therapeutics in experimental animal models of various diseases...
January 3, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29303013/inhibition-of-plasma-kallikrein-kinin-system-to-alleviate-renal-injury-and-arthritis-symptoms-in-rats-with-adjuvant-induced-arthritis
#4
Jie Zhu, Hui Wang, Jingyu Chen, Wei Wei
BACKGROUND: Rheumatoid arthritis (RA) is a chronic systemic autoimmune disease. Impairment of kidney functions in RA was observed. However, the mechanism of kidney injury of RA has not been clear. Plasma kallikrein-kinin system (KKS) was involved in inflammatory processes in kidney disease. AIM: This study aimed to explore the role of plasma KKS in immune reactions and kidney injury of RA. RESULTS: The paw of AA rats appeared to be swelling and redness, the arthritis index was significantly increased on the 18, 21 and 24 d after injection and secondary inflammation in multi-sites was observed...
January 5, 2018: Immunopharmacology and Immunotoxicology
https://www.readbyqxmd.com/read/29285756/expression-distribution-and-function-of-kinin-b1-receptor-in-the-rat-diabetic-retina
#5
Soumaya Hachana, Menakshi Bhat, Jacques Sénécal, Frédéric Huppé-Gourgues, Réjean Couture, Elvire Vaucher
BACKGROUND AND PURPOSE: Kinin B1 receptor (B1R) contributes to vascular inflammation and blood-retinal barrier breakdown in diabetic retinopathy (DR). This study aims at investigating further the changes of expression, the cellular localization and the vascular inflammatory effect of B1R in the retina of streptozotocin diabetic rats. EXPERIMENTAL APPROACH: The distribution of B1R on retinal cell types was investigated by immunocytochemistry. Impact of intravitreal B1R agonist R-838 and eye-drops application of the B1R antagonist R-954 was measured on retinal leukocytes adhesion, gene expression of the kinin and VEGF systems, B1R immunodetection, microgliosis and capillary leakage...
December 29, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29277639/contact-kallikrein-kinin-system-activation-in-whole-human-blood-induced-by-low-concentrations-of-%C3%AE-fe2o3-nanoparticles
#6
Kristina N Ekdahl, Padideh Davoodpour, Barbro Ekstrand-Hammarström, Karin Fromell, Osama A Hamad, Jaan Hong, Anders Bucht, Camilla Mohlin, Gulaim A Seisenbaeva, Vadim G Kessler, Bo Nilsson
Iron-oxide nanoparticles (NPs) generated by environmental events are likely to represent health problems. α-Fe2O3 NPs were synthesized, characterized and tested in a model for toxicity utilizing human whole blood without added anticoagulant. MALDI-TOF of the corona was performed and activation markers for plasma cascade systems (complement, contact and coagulation systems), platelet consumption and release of growth factors, MPO, and chemokine/cytokines from blood cells were analyzed. The coronas formed on the pristine α-Fe2O3 NPs contained contact system proteins and they induced massive activation of the contact (kinin/kallikrein) system, as well as thrombin generation, platelet activation, and release of two pro-angiogeneic growth factors: platelet-derived growth factor and vascular endothelial growth factor, whereas complement activation was unaffected...
December 22, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29250740/blockade-of-bradykinin-receptors-worsens-the-dystrophic-phenotype-of-mdx-mice-differential-effects-for-b1-and-b2-receptors
#7
María José Acuña, Daniela Salas, Adriana Córdova-Casanova, Meilyn Cruz-Soca, Carlos Céspedes, Carlos P Vio, Enrique Brandan
The Kallikrein Kinin System (KKS) is a vasoactive peptide system with known functions in the maintenance of tissue homeostasis, renal function and blood pressure. The main effector peptide of KKS is Bradykinin (BK). This ligand has two receptors: a constitutive B2 receptor (B2R), which has been suggested to have anti-fibrotic effects in renal and cardiac models of fibrosis; and the inducible B1 receptor (B1R), whose expression is induced by damage and inflammation. Inflammation and fibrosis are hallmarks of Duchenne muscular dystrophy (DMD), therefore we hypothesized that the KKS may play a role in this disease...
December 17, 2017: Journal of Cell Communication and Signaling
https://www.readbyqxmd.com/read/29237166/kallikrein-cleaves-c3-and-activates-complement
#8
Sarah Irmscher, Nadia Döring, Luke D Halder, Emeraldo A H Jo, Isabell Kopka, Christine Dunker, Ilse D Jacobsen, Shanshan Luo, Hortense Slevogt, Stefan Lorkowski, Niklas Beyersdorf, Peter F Zipfel, Christine Skerka
The human plasma contact system is an immune surveillance system activated by the negatively charged surfaces of bacteria and fungi and includes the kallikrein-kinin, the coagulation, and the fibrinolytic systems. Previous work shows that the contact system also activates complement, and that plasma enzymes like kallikrein, plasmin, thrombin, and FXII are involved in the activation process. Here, we show for the first time that kallikrein cleaves the central complement component C3 directly to yield active components C3b and C3a...
December 14, 2017: Journal of Innate Immunity
https://www.readbyqxmd.com/read/29236387/effect-of-3-substituted-1-4-benzodiazepin-2-ones-on-bradykinin-induced-smooth-muscle-contraction
#9
P A Virych, O V Shelyuk, T A Kabanova, E I Khalimova, V S Martynyuk, V I Pavlovsky, S A Andronati
Biochemical properties of 3-substituted 1,4-benzodiazepine determined by the characteristics of their chemical structure. Influence of 3-substituted 1,4-benzodiazepin-2-ones on maximal normalized rate and amplitudes of isometric smooth muscle contraction in rats was investigated. Compounds MX-1775 and MX-1828 demonstrated the similar inhibition effect on bradykinin-induced contraction of smooth muscle like competitive inhibitor des-arg9-bradykinin-acetate to bradykinin B2-receptors. MX-1626 demonstrated unidirectional changes of maximal normalized rate and force of smooth muscle that proportionally depended on bradykinin concentration in the range 10-10-10-6 M...
January 2017: Ukrainian Biochemical Journal
https://www.readbyqxmd.com/read/29227570/high-molecular-weight-kininogen-breaking-bad-in-lethal-endotoxemia
#10
Z L M Hofman, S De Maat, C Maas
Kinin formation is a powerful inflammatory process. In the intravascular compartment, bradykinin (RPPGFSPFR) is uniquely released from high-molecular-weight kininogen (HK) after activation of the plasma contact system (reviewed in [1]) and acts on its cognate kinin B2 receptor (B2R), which is constitutively expressed on endothelial cells. The action of carboxypeptidase N (which removes C-terminal arginines) converts bradykinin into des-Arg9 -bradykinin. This article is protected by copyright. All rights reserved...
December 11, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/29225113/experimental-periodontitis-in-rats-potentiates-inflammation-at-a-distant-site-role-of-b1-kinin-receptor
#11
Ana Paula Prestes, Willian Moreira Machado, Junior Garcia Oliveira, Luiz Renato Olchanheski, Fábio André Santos, Gustavo Ferreira Alves, Arthur Silveira Prudente, Michel Fleith Otuki, Kátia Sabrina Paludo, Regina Sordi, Daniel Fernandes
No abstract text is available yet for this article.
December 7, 2017: Life Sciences
https://www.readbyqxmd.com/read/29223926/an-update-on-factor-xi-structure-and-function
#12
REVIEW
Bassem M Mohammed, Anton Matafonov, Ivan Ivanov, Mao-Fu Sun, Qiufang Cheng, S Kent Dickeson, Chan Li, David Sun, Ingrid M Verhamme, Jonas Emsley, David Gailani
Factor XI (FXI) is the zymogen of a plasma protease, factor XIa (FXIa), that contributes to thrombin generation during blood coagulation by proteolytic activation of several coagulation factors, most notably factor IX (FIX). FXI is a homolog of prekallikrein (PK), a component of the plasma kallikrein-kinin system. While sharing structural and functional features with PK, FXI has undergone adaptive changes that allow it to contribute to blood coagulation. Here we review current understanding of the biology and enzymology of FXI, with an emphasis on structural features of the protein as they relate to protease function...
January 2018: Thrombosis Research
https://www.readbyqxmd.com/read/29201909/quantitative-serum-proteomic-analysis-of-essential-hypertension-using-itraq-technique
#13
Jing-Wen Xu, Yun-Lun Li, Shi-Jun Zhang, Wen-Qing Yang, Wen-Ting Nie, Hai-Qiang Jiang
Essential hypertension (EH) is a risk factor for some severe diseases. This study aimed to screen out serum special proteins and seek interaction between them, which would provide new therapeutic targets and elucidate the comprehensive pathophysiological mechanism for EH. Patients with EH (Group A, n = 47) and healthy controls (HC) (Group B, n = 47) were recruited in this study. Serums from the two groups were analyzed with isobaric tags for relative and absolute quantitation coupled two-dimensional liquid chromatography followed by electrospray ionization-tandem mass spectrometry technique, while the candidate special proteins were verified with ELISA and western blot...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29168929/kinin-b1-receptors-as-a-therapeutic-target-for-inflammation
#14
Fatimunnisa Qadri, Michael Bader
Kinins are peptide mediators exerting their pro-inflammatory actions by the selective stimulation of two distinct G-protein coupled receptors, termed BKB1R and BKB2R. While BKB2R is constitutively expressed in a multitude of tissues, BKB1R is hardly expressed at baseline but highly inducible by inflammatory mediators. In particular, BKB1R was shown to be involved in the pathogenesis of numerous inflammatory diseases. Areas covered: This review intends to evaluate the therapeutic potential of substances interacting with the BKB1R...
November 23, 2017: Expert Opinion on Therapeutic Targets
https://www.readbyqxmd.com/read/29163205/localization-and-interaction-between-kinin-b1-receptor-and-nadph-oxidase-in-the-vascular-system-of-diabetic-rats
#15
Youssef Haddad, Réjean Couture
Kinin B1 receptor (B1R) enhanced superoxide anion ([Formula: see text]) production in the vasculature of diabetic rats. This study investigates the induction and distribution of B1R in diabetic blood vessels and addresses the hypothesis that B1R is co-localized with NADPH oxidase (NOX1 and NOX2) and produces its activation via protein kinase C (PKC). Diabetes was induced in rats with streptozotocin (STZ 65 mg.kg(-1), i.p.). Two weeks later, the production of [Formula: see text] was measured in aorta rings in response to the B1R agonist (Sar[D-Phe(8)]-des-Arg(9)-BK, 20 μM) by the method of lucigenin-enhanced chemiluminescence...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29139623/extracellular-proteinases-of-candida-species-pathogenic-yeasts
#16
Maria Rapala-Kozik, Oliwia Bochenska, Dorota Zajac, Justyna Karkowska-Kuleta, Mariusz Gogol, Marcin Zawrotniak, Andrzej Kozik
The increased incidence of severe disseminated infections caused by opportunistic yeast-like fungi Candida spp. highlights the urgent need for research into the major virulence factors of these pathogens - extracellular aspartic proteinases of the candidapepsin and yapsin families. Classically, these enzymes were considered to be generally destructive factors that damage host tissues and provide nutrients for pathogen propagation. However, in recent decades, novel and more specific functions have been suggested for extracellular candidal proteinases...
November 15, 2017: Molecular Oral Microbiology
https://www.readbyqxmd.com/read/29133203/expression-and-functional-characterization-of-tachykinin-related-peptides-in-the-blood-feeding-bug-rhodnius-prolixus
#17
A N S Haddad, M S Defferrari, S Hana, S G Szeto, A B Lange
Tachykinins (tachykinin-related peptides, TRPs) are multifunctional neuropeptides that have widespread distribution in the central nervous system (CNS) and in the gastrointestinal tract of many insects, and most have been shown to stimulate contractions of visceral muscles. Invertebrate TRPs carry a characteristic conserved C-terminal pentapeptide (FXGXR-amide) and most of them share some amino acid sequence similarities (approx. 45%) with the vertebrate and mammalian tachykinin family. We have functionally characterized the tachykinins in R...
November 10, 2017: Peptides
https://www.readbyqxmd.com/read/29111117/identification-of-b-cell-recognized-linear-epitopes-in-a-snake-venom-serine-proteinase-from-the-central-american-bushmaster-lachesis-stenophrys
#18
M Madrigal, A Alape-Girón, E Barboza-Arguedas, W Aguilar-Ulloa, M Flores-Díaz
Snake venom serine proteinases are toxins that perturb hemostasis acting on proteins from the blood coagulation cascade, the fibrinolytic or the kallikrein-kinin system. Despite the relevance of these enzymes in envenomations by viper bites, the characterization of the antibody response to these toxins at the molecular level has not been previously addressed. In this work surface-located B cell recognized linear epitopes from a Lachesis stenophrys venom serine proteinase (UniProt accession number Q072L7) were predicted using an artificial neuronal network at the ABCpred server, the corresponding peptides were synthesized and their immunoreactivity was analyzed against a panel of experimental and therapeutic antivenoms...
October 27, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/29038201/kinin-b1-receptor-promotes-neurogenic-hypertension-through-activation-of-centrally-mediated-mechanisms
#19
Srinivas Sriramula, Eric Lazartigues
Hypertension is associated with increased activity of the kallikrein-kinin system. Kinin B1 receptor (B1R) activation leads to vasoconstriction and inflammation. Despite evidence supporting a role for the B1R in blood pressure regulation, the mechanisms by which B1R could alter autonomic function and participate in the pathogenesis of hypertension remain unidentified. We sought to explore whether B1R-mediated inflammation contributes to hypertension and investigate the molecular mechanisms involved. In this study, we tested the hypothesis that activation of B1R in the brain is involved in the pathogenesis of hypertension, using the deoxycorticosterone acetate-salt model of neurogenic hypertension in wild-type and B1R knockout mice...
December 2017: Hypertension
https://www.readbyqxmd.com/read/29036225/human-plasma-derived-c1-esterase-inhibitor-concentrate-has-limited-effect-on-house-dust-mite-induced-allergic-lung-inflammation-in-mice
#20
Ingrid Stroo, Jack Yang, Adam A Anas, J Daan de Boer, Gerard van Mierlo, Dorina Roem, Diana Wouters, Ruchira Engel, Joris J T H Roelofs, Cornelis van 't Veer, Tom van der Poll, Sacha Zeerleder
C1 esterase inhibitor (C1-INH) can inhibit multiple pathways (complement, contact-kinin, coagulation, and fibrinolysis) that are all implicated in the pathophysiology of asthma. We explored the effect of human plasma-derived C1-INH on allergic lung inflammation in a house dust mite (HDM) induced asthma mouse model by daily administration of C1-INH (15 U) during the challenge phase. NaCl and HDM exposed mice had comparable plasma C1-INH levels, while bronchoalveolar lavage fluid (BALF) levels were increased in HDM exposed mice coinciding with slightly reduced activation of complement (C5a)...
2017: PloS One
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