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https://www.readbyqxmd.com/read/28810528/neuroprotection-of-bradykinin-bradykinin-b2-receptor-system-in-cerebral-ischemia
#1
REVIEW
Bingyuan Ji, Baohua Cheng, Yanyou Pan, Chunmei Wang, Jing Chen, Bo Bai
Bradykinin B2 receptor (B2R) activated by its endogenous ligand bradykinin participates in various physiological processes including neurogenesis, neuronal differentiation, and control of inflammation and blood pressure. Besides these effects, B2R has been demonstrated to protect neurons from ischemia/reperfusion (I/R) injury. Here, we highlight the mechanisms of BK/B2R-mediated neuroprotective effects in the peripheral and central nervous systems. Moreover, this review article summarizes some of the signaling pathways of B2R in cerebral ischemia, leading to a better understanding of its neuroprotection...
August 11, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28808141/a-critical-role-for-plasma-kallikrein-in-the-pathogenesis-of-autoantibody-induced-arthritis
#2
Aizhen Yang, Junsong Zhou, Bo Wang, Jihong Dai, Robert W Colman, Wenchao Song, Yi Wu
The plasma kallikrein-kinin system (KKS) consists of serine proteases, prekallikrein (pKal) and factor XII (FXII), and a cofactor, high-MW kininogen (HK). Upon activation, activated pKal and FXII cleave HK to release bradykinin. Activation of this system has been noted in patients with rheumatoid arthritis, and its pathogenic role has been characterized in animal arthritic models. In this study, we generated 2 knockout mouse strains that lacked pKal and HK and determined the role of KKS in autoantibody-induced arthritis...
August 14, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28801827/rapid-screening-and-identification-of-ace-inhibitors-in-snake-venoms-using-at-line-nanofractionation-lc-ms
#3
Marija Mladic, Tessa de Waal, Lindsey Burggraaff, Julien Slagboom, Govert W Somsen, Wilfried M A Niessen, R Manjunatha Kini, Jeroen Kool
This study presents an analytical method for the screening of snake venoms for inhibitors of the angiotensin-converting enzyme (ACE) and a strategy for their rapid identification. The method is based on an at-line nanofractionation approach, which combines liquid chromatography (LC), mass spectrometry (MS), and pharmacology in one platform. After initial LC separation of a crude venom, a post-column flow split is introduced enabling parallel MS identification and high-resolution fractionation onto 384-well plates...
August 11, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28801761/milonine-a-morphinandienone-alkaloid-has-anti-inflammatory-and-analgesic-effects-by-inhibiting-tnf-%C3%AE-and-il-1%C3%AE-production
#4
Larissa Rodrigues Silva, Adriano Francisco Alves, Luiz Henrique Agra Cavalcante-Silva, Renan Marinho Braga, Reinaldo Nóbrega de Almeida, José Maria Barbosa-Filho, Márcia Regina Piuvezam
Milonine is a morphinandienone alkaloid from Cissampelos sympodialis Eichl (Menispermaceae), a plant used in Brazil to treat inflammatory disorders. In this study, we evaluated the anti-inflammatory and analgesic activity of milonine (MIL) by using classical experimental models of inflammation and nociception. The results showed that MIL reduced the paw edema formation induced by lipopolysaccharide, prostaglandin E2, and bradykinin, without interfering with the serotonin-induced edema. With respect to the nociception experiments, MIL decreased the exudate into the peritoneum induced by acetic acid, maintaining the tissue morphology...
August 11, 2017: Inflammation
https://www.readbyqxmd.com/read/28798744/the-mast-cell-contact-and-coagulation-system-connection-in-anaphylaxis
#5
REVIEW
Mar Guilarte, Anna Sala-Cunill, Olga Luengo, Moisés Labrador-Horrillo, Victoria Cardona
Anaphylaxis is the most severe form of allergic reaction, resulting from the effect of mediators and chemotactic substances released by activated cells. Mast cells and basophils are considered key players in IgE-mediated human anaphylaxis. Beyond IgE-mediated activation of mast cells/basophils, further mechanisms are involved in the occurrence of anaphylaxis. New insights into the potential relevance of pathways other than mast cell and basophil degranulation have been unraveled, such as the activation of the contact and the coagulation systems...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28797641/b2-kinin-receptors-in-the-dorsal-periaqueductal-gray-are-implicated-in-the-panicolytic-like-effect-of-opiorphin
#6
Caio César Sestile, Jhonatan Christian Maraschin, Marcel Pereira Rangel, Rosangela Getirana Santana, Hélio Zangrossi, Frederico Guilherme Graeff, Elisabeth Aparecida Audi
Reported results have shown that the pentapeptide opiorphin inhibits oligopeptidases that degrade brain neuropeptides, and has analgesic and antidepressant effects in experimental animals, without either tolerance or dependency after chronic administration. In a previous study we showed that opiorphin has a panicolytic-like effect in the dorsal periaqueductal gray (dPAG) electrical stimulation test (EST), mediated by the μ-opioid receptor (MOR). This study further analyzes the mechanism of opiorphin panicolytic action, using the EST and drug injection inside the dPAG...
August 7, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28794132/an-essential-role-of-high-molecular-weight-kininogen-in-endotoxemia
#7
Aizhen Yang, Zhanli Xie, Bo Wang, Robert W Colman, Jihong Dai, Yi Wu
In this study, we show that mice lacking high-molecular-weight kininogen (HK) were resistant to lipopolysaccharide (LPS)-induced mortality and had significantly reduced circulating LPS levels. Replenishment of HK-deficient mice with human HK recovered the LPS levels and rendered the mice susceptible to LPS-induced mortality. Binding of HK to LPS occurred through the O-polysaccharide/core oligosaccharide, consistent with the ability to bind LPS from K. pneumoniae, P. aeruginosa, S. minnesota, and different E...
August 9, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28782710/use-of-nebulized-milrinone-in-cardiac-surgery-comparison-of-vibrating-mesh-and-simple-jet-nebulizers
#8
Paul Gavra, Maxime Laflamme, André Y Denault, Yves Théôret, Louis P Perrault, France Varin
Cardiopulmonary bypass triggers an ischemia-reperfusion injury with endothelial dysfunction in the pulmonary circulation which can result in pulmonary hypertension. Inhaled milrinone reduces this reperfusion phenomenon and two methods commonly available for administering it are simple jet and vibrating mesh nebulization. However, neither their generated milrinone particle size profiles, nor their ability to aid endothelial relaxation have been compared. Simple jet and vibrating mesh particle size distributions of milrinone were verified through cascade impaction and their efficacy was tested on a cardiopulmonary bypass (CPB) swine model...
August 4, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28782632/cleaved-kininogen-as-a-biomarker-for-bradykinin-release-in-hereditary-angioedema
#9
Zonne L M Hofman, Steven de Maat, Chiara Suffritti, Andrea Zanichelli, Cassandra van Doorn, Silvie A E Sebastian, Nora Veszeli, Dorottya Csuka, Thomas Renné, Gerard Pasterkamp, Marco Cicardi, Henriette Farkas, C Erik Hack, Coen Maas
Cleaved high-molecular weight kininogen (cHK) in plasma is a biomarker for bradykinin formation. We developed an immuno-assay to detect cHK in plasma. cHK plasma levels are increased in asymptomatic C1-INH-HAE patients, and increase further during angioedema attacks.
August 3, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28760261/corrigendum-to-relationship-of-angiotensin-i-converting-enzyme-ace-and-bradykinin-b2-receptor-bdkrb2-polymorphism-with-diabetic-nephropathy-bba-molecular-basis-of-disease-vol-1863-iss-6-2017-1264-1272
#10
Honghong Zou, Guoqing Wu, Jinlei Lv, Gaosi Xu
No abstract text is available yet for this article.
September 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28759126/ep2-receptor-plays-pivotal-roles-in-generating-mechanical-hyperalgesia-after-lengthening-contraction
#11
Hiroki Ota, Kimiaki Katanosaka, Shiori Murase, Tomoyuki Furuyashiki, Shuh Narumiya, Kazue Mizumura
INTRODUCTION: We previously demonstrated that nerve growth factor (NGF) and glial cell line-derived neurotrophic factor (GDNF) were upregulated after lengthening contraction (LC) in exercised muscle through B2 bradykinin receptor activation and cyclooxygenase (COX)-2 upregulation, respectively, and that these trophic factors sensitized nociceptors resulting in mechanical hyperalgesia (delayed-onset muscle soreness, DOMS). Here we examined the prostaglandin receptor subtype involved in DOMS...
July 31, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28758595/vasodilator-effect-of-angiotensin-1-7-on-vascular-coronary-bed-of-rats-role-of-mas-ace-and-ace2
#12
Patrícia Lanza Moraes, Lucas Miranda Kangussu, Carlos Henrique Castro, Robson As Santos, Anderson José Ferreira, Alvair P Almeida
Angiotensin(Ang)-(1-7) is a biologically active member of the renin-angiotensin system that participates of the regulation of blood pressure. Although Ang-(1-7) is able to potentiate the vasodilator effect of bradykinin in coronary bed of rats, a direct vasodilator effect of Ang-(1-7) in this vascular bed has not been characterized. Thus, the aim of this study was to evaluate the mechanisms involved in the vasodilator effect of Ang-(1-7) in the vasculature of isolated rat hearts perfused according to the Langendorff technique at constant flow...
July 28, 2017: Protein and Peptide Letters
https://www.readbyqxmd.com/read/28757212/bradykinin-b2-and-dopamine-d2-receptors-form-a-functional-dimer
#13
Anna Niewiarowska-Sendo, Agnieszka Polit, Monika Piwowar, Magdalena Tworzydło, Andrzej Kozik, Ibeth Guevara-Lora
In recent years a wide range of studies have shown that G protein-coupled receptors modulate a variety of cell functions through the formation of dimers. For instance, there is growing evidence for the dimerization of bradykinin or dopamine receptors, both as homodimers and heterodimers. A discovery of direct interactions of angiotensin II receptors with bradykinin 2 receptor (B2R) or dopamine D2 (D2R) receptor has led to a hypothesis on a potential dimerization between two latter receptors. In this study, we have demonstrated a constitutive colocalization of receptors on the membranes of HEK293 cells transiently transfected with plasmid vectors encoding B2R and D2R, fused with fluorescent proteins...
July 27, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28751047/evaluation-of-anti-inflammatory-potential-of-aqueous-extract-and-polysaccharide-fraction-of-thuja-occidentalis-linn-in-mice
#14
Irismara S Silva, Lucas A D Nicolau, Francisca B M Sousa, Simone de Araújo, Ana P Oliveira, Thiago S L Araújo, Luan Kelves M Souza, Conceição S Martins, Pedro E A Aquino, Lucas L Carvalho, Renan O Silva, Pedro J Rolim-Neto, Jand Venes R Medeiros
Inflammation is a protective reaction of the microcirculation. However, sustained inflammation can lead to undesired effects. Thuja occidentalis Linn has many pharmacological properties but has no anti-inflammatory activity described. Thus, this study aims evaluating the anti-inflammatory activity of the aqueous extract (AE) and the polysaccharide fraction (PLS) of T. occidentalis L. in mice. The results of our evaluations in various experimental models indicated that AE and PLS (3, 10, and 30mg/kg, i.p.) reduced (p ˂ 0...
July 24, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28744223/modulation-of-the-plasma-kallikrein-kinin-system-proteins-performed-by-heparan-sulfate-proteoglycans
#15
REVIEW
Guacyara Motta, Ivarne L S Tersariol
Human plasma kallikrein-kinin system proteins are related to inflammation through bradykinin. In the proximity of its target cells, high molecular weight kininogen (H-kininogen) is the substrate of plasma kallikrein, which releases bradykinin from H-kininogen. Heparan sulfate proteoglycans (HSPGs) play a critical role in either recruiting kinin precursors from the plasma, or in the assembly of kallikrein-kinin system components on the cell surface. Furthermore, HSPGs mediate the endocytosis and activation of H-kininogen and plasma prekallikrein...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28743596/the-plasma-contact-system-a-protease-cascade-at-the-nexus-of-inflammation-coagulation-and-immunity
#16
REVIEW
Henri Weidmann, Laura Heikaus, Andy T Long, Clément Naudin, Hartmut Schlüter, Thomas Renné
The contact system is a potent procoagulant and proinflammatory plasma protease cascade that is initiated by binding ("contact")-induced, auto-activation of factor XII zymogen. Formed active serine protease FXIIa then cleaves plasma prekallikrein to kallikrein that in turn liberates the mediator bradykinin from its precursor high molecular weight kininogen. Bradykinin induces inflammation with implications for host defense and innate immunity. FXIIa also triggers the intrinsic pathway of coagulation that has been shown to critically contribute to thrombosis...
July 22, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28726567/possible-mechanisms-involved-in-the-anti-nociceptive-effects-of-hydro-ethanolic-leaf-extract-of-ziziphus-abyssinica
#17
Eric Boakye-Gyasi, Isaac Tabiri Henneh, Wonder Kofi Mensah Abotsi, Elvis Ofori Ameyaw, Eric Woode
CONTEXT: Various parts of Ziziphus abyssinica Hochst ex. A. Rich (Rhamnaceae) have been used in Ghanaian and African traditional medicine as an analgesic. However, there are little scientific data to support the anti-nociceptive effects of the hydro-ethanolic leaf extract of Ziziphus abyssinica (EthE) as well as the possible mechanisms involved in its anti-nociceptive effects. PURPOSE: To predict possible nociceptive pathways involved in the anti-nociceptive effects of EthE...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28726167/early-increased-bradykinin-1-receptor-contributes-to-hemorrhagic-transformation-after-ischemic-stroke-in-type-1-diabetic-rats
#18
Hongfei Sang, Zhongming Qiu, Jin Cai, Wenya Lan, Linjie Yu, Hao Zhang, Min Li, Yi Xie, Ruibing Guo, Ruidong Ye, Xinfeng Liu, Ling Liu, Renliang Zhang
Hemorrhagic transformation (HT) is a major complication of ischemic stroke and further deteriorates neurological outcomes. Bradykinin 1 receptor (B1R) has been proven to mediate vasculo-toxicity in various experimental models. However, its role in the development of HT after stroke remains unclear. We detected the B1R expression in brain tissues with or without HT in a rat model of cerebral ischemia/reperfusion (I/R) with type 1 diabetes, showing higher B1R expression in the hemorrhagic areas than the ischemic tissues...
July 19, 2017: Translational Stroke Research
https://www.readbyqxmd.com/read/28724979/impairment-of-coronary-endothelial-function-by-hypoxia-reoxygenation-involves-trpc3-inhibition-mediated-kca-channel-dysfunction-implication-in-ischemia-reperfusion-injury
#19
Xiang-Chong Wang, Wen-Tao Sun, Jie Fu, Jun-Hao Huang, Cheuk-Man Yu, Malcolm John Underwood, Guo-Wei He, Qin Yang
Despite increasing knowledge of the significance of calcium-activated potassium (KCa) and canonical transient receptor potential (TRPC) channels in endothelial physiology, no studies so far have investigated the link between these two distinct types of channels in the control of vascular tone in pathological conditions. We previously demonstrated that hypoxia-reoxygenation (H-R) inhibits endothelial KCa and TRPC3 channels in porcine coronary arteries (PCAs). The present study further investigated whether modulation of TRPC3 is involved in H-R-induced KCa channel inhibition and associated vasodilatory dysfunction using approaches of wire myography, whole-cell voltage-clamp, and coimmunoprecipitation...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28724548/bradykinin-does-not-acutely-sensitize-the-reflex-pressor-response-during-hindlimb-skeletal-muscle-stretch-in-decerebrate-rats
#20
Korynne S Rollins, Joshua R Smith, Peter J Esau, Evan A Kempf, Tyler D Hopkins, Steven W Copp
Hindlimb skeletal muscle stretch (i.e., selective activation of the muscle mechanoreflex) in decerebrate rats evokes reflex increases in blood pressure and sympathetic nerve activity. Bradykinin has been found to sensitize mechano-gated channels through a bradykinin B2 receptor-dependent mechanism. Moreover, bradykinin B2 receptor expression on sensory neurons is increased following chronic femoral artery ligation in the rat (a model of simulated peripheral artery disease). We tested the hypothesis that, in decerebrate, unanesthetized rats, the injection of bradykinin into the arterial supply of a hindlimb would acutely augment (i...
July 19, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
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