DESCRIPTION: (Adapted from the Investigators Abstract): Adenosine administered as an aerosol to asthmatics causes bronchoconstriction, while in non-asthmatics adenosine causes bronchodilation. This occurs because the activation of A2B adenosine receptors on sensitized mast cells triggers degranulation, releasing histamine, leukotrienes, and other allergic mediators. A2B adenosine receptors are blocked by theophylline, a xanthine that is effective in treating asthma. However, theophylline is a non-selective antagonist of all four adenosine receptor subtypes and produces side effects due primarily to A1 receptor blockade, including insomnia and diuresis. The incidence of asthma is increasing and current treatment options are limited. New drugs that are potent and selective antagonists of A2B adenosine receptors have great potential for the treatment of asthma and other allergic diseases. Adenosine Therapeutics, LLC owns the first potent and selective A2B antagonists. The purpose of this phase I ...
A review. The low affinity A2B adenosine receptor, like any other adenosine receptor subtype, belongs to the super-family of seven transmembrane domain G protein-coupled receptors (7TMs GPCR) and is classified by the GPCR database in the family of rhodopsin like receptors (Class A of GPCR). It has been cloned from various species, including rat and human, and its sequences are highly similar across species, ranging from 85% identity between human and mouse and 95% identity between rat and mouse. The A2B receptors show a ubiquitous distribution, the highest levels are present in cecum, colon and bladder, followed by blood vessels, lung, eye and mast cells. Through A2B receptors adenosine seems to cause mast cells degranulation, vasodilation, cardiac fibroblast proliferation, inhibition of Tumor Necrosis Factor (TNF-α), increased synthesis of interleukin-6 (IL-6), stimulation of Cl- secretion in intestinal epithelia and hepatic glucose prodn. Hence, A2B adenosine receptor agonists could be useful ...
ALI is one of the leading causes of morbidity and mortality of critical illness with extremely limited therapeutic options. In the present study, we pursued the hypothesis that tissue-specific adenosine signaling events through the A2B adenosine receptor contribute to lung protection and can thus be targeted for ALI treatment. To make progress on this front, we performed a head-to-head comparison of mice with genetic deletion of Adora2b in the myeloid lineage, vascular endothelial cells, or alveolar epithelial cells. Interestingly, we only observed a phenotype in mice with tissue-specific Adora2b deletion in alveolar epithelial cells, closely resembling the observed detrimental effects of global Adora2b deletion during ALI. Interestingly, the injurious effects of our two-hit model where an inflammatory event (i.t. LPS treatment) is followed by injurious mechanical ventilation seem to be supra-additive compared with the effects of injurious ventilation or LPS i.t. alone. Based on these findings ...
Disclosed are processes for the synthesis of novel compounds that are A.sub.2B adenosine receptor antagonists, having the structure of Formula I or Formula II: ##STR00001## by cyclizing a compound of the formula (3): ##STR00002##
The development, maintenance and repair of the skeletal system are dependent on the differentiation of both chondrocytes and osteoblasts from their common progenitor, the mesenchymal stem cell (MSC). The A2B adenosine receptor (A2BAR) is a G-protein-coupled receptor that signals by increasing cAMP and/or activating phospholipase C signaling. Considering the published roles of cAMP on MSC differentiation, and our finding that the expression of the A2BAR is induced following injury, we hypothesized that ablation or activation of the A2BAR impacts the differentiation of osteoblasts and chondrocytes and that this would manifest as changes in skeletal development and bone fracture repair. Activation of the A2BAR increased the differentiation of bone marrow-derived MSCs to osteoblasts by increasing mRNA expression of the transcription factors runt-related transcription factor 2 (Runx2) and Sp7 transcription factor (Osterix), which are essential for osteoblast differentiation. To examine the effect of ...
Corresponding Author: Anaclet Ngezahayo Department of Cell Physiology and Biophysics, Institute of Cell Biology and Biophysics, Leibniz University Hannover, Herrenhäuser Straße 2, Hannover, 30419 (Germany ...
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Although acute lung injury contributes significantly to critical illness, resolution often occurs spontaneously via activation of incompletely understood pathways. We recently found that mechanical ventilation of mice increases the level of pulmonary adenosine, and that mice deficient for extracellular adenosine generation show increased pulmonary edema and inflammation after ventilator-induced lung injury (VILI). Here, we profiled the response to VILI in mice with genetic deletions of each of the 4 adenosine receptors (ARs) and found that deletion of the A2BAR gene was specifically associated with reduced survival time and increased pulmonary albumin leakage after injury. In WT mice, treatment with an A2BAR-selective antagonist resulted in enhanced pulmonary inflammation, edema, and attenuated gas exchange, while an A2BAR agonist attenuated VILI. In bone marrow-chimeric A2BAR mice, although the pulmonary inflammatory response involved A2BAR signaling from bone marrow-derived cells, A2BARs ...
The present invention provides compounds and pharmaceutical compositions that are substituted pyridyl-linked-xantbines of formula I which are selective antagonists of A2B adenosine receptors (ARs). These compounds and compositions are useful as pharmaceutical agents.
Eleven-year-old published author and seasoned speaker Adora Svitak talks about the Six Traits: Ideas and Content, with Persuasive Writing. | 6-Traits Resources
TY - JOUR. T1 - Attenuation of chronic pulmonary inflammation in A2B adenosine receptor knockout mice. AU - Zaynagetdinov, Rinat. AU - Ryzhov, Sergey. AU - Goldstein, Anna E.. AU - Yin, Huiyong. AU - Novitskiy, Sergey V.. AU - Goleniewska, Kasia. AU - Polosukhin, Vasiliy V.. AU - Newcomb, Dawn C.. AU - Mitchell, Daphne. AU - Morschl, Eva. AU - Zhou, Yang. AU - Blackburn, Michael R.. AU - Peebles, R. Stokes. AU - Biaggioni, Italo. AU - Feoktistov, Igor. PY - 2010/5/1. Y1 - 2010/5/1. N2 - Pharmacologic evidence suggests that activation of A2B adenosine receptors results in proinflammatory effects relevant to the progression of asthma, a chronic lung disease associated with elevated interstitial adenosine concentrations in the lung. This concept has been challenged by the finding that genetic removal of A2B receptors leads to exaggerated responses in models of acute inflammation. Therefore, the goal of our study was to determine the effects of A2B receptor gene ablation in the context of ...
The low-affinity A2B receptor is known to mediate proinflammatory effects of adenosine by up-regulating production of cytokines and growth factors. This view has been supported by a large body of evidence provided by pharmacological analysis of adenosine-dependent cytokine and growth factor secretion in various cells, tissues, and organs (8, 11, 13, 18, 31, 32, 33, 34, 35, 36, 37, 38). Pharmacological inhibition of A2B receptors significantly reduced elevations in proinflammatory cytokines as well as mediators of airway remodeling induced by high adenosine levels in the lungs of ADA-deficient mice (8). In the ragweed allergic mouse model, A2B antagonism plays an important role in inhibition of airway reactivity and inflammation (39, 40). In agreement with data obtained in these animal models of pulmonary inflammation, stimulation of A2B receptors in the human mast cell line HMC-1 was shown to induce secretion of proinflammatory Th2 cytokines IL-4 and IL-13 (11, 12), as well as angiogenic factors ...
Scientists have found a possible new therapeutic target against atherosclerosis resulting from a diet high in fat and cholesterol.. The researchers from Boston University School of Medicine (BUSM) have identified for the first time the A2b adenosine receptor (A2bAR) as an agent responsible for protection against early stages of atherosclerosis.. Adenosine is a metabolite produced naturally by cells at low levels, and at higher levels during exercise or stress.. Adenosine binds to and activates cell surface receptors, one of which is the A2bAR. Previous studies have described the A2bAR as anti-inflammatory and protective against kidney ischemia, cardiac reperfusion injury and restenosis, typically via bone marrow cell signals.. In mouse models, BUSM researchers found atherosclerosis induced by a high-fat diet was more pronounced in the absence of the A2bAR.. They also found bone marrow transplantation experiments indicated that A2bAR bone marrow cell signals alone were not sufficient to elicit ...
Þetta er rómuð trílógía sem var gerð fyrir sjónvarp og fjallar um afrísk-amerísk þemu. THE BOY WHO PAINTED CHRIST BLACK, segir af skólastjóra í smábæ þar sem hann reynir að verja umdeildan nemanda. LONG BLACK SONG er byggð á sögu Richard Wright um mann sem fórnar auði sínum fyrir eiginkonu sem heldur framhjá honum, og THE REUNION er byggð á sögu Maya... Lesa meira. Þetta er rómuð trílógía sem var gerð fyrir sjónvarp og fjallar um afrísk-amerísk þemu. THE BOY WHO PAINTED CHRIST BLACK, segir af skólastjóra í smábæ þar sem hann reynir að verja umdeildan nemanda. LONG BLACK SONG er byggð á sögu Richard Wright um mann sem fórnar auði sínum fyrir eiginkonu sem heldur framhjá honum, og THE REUNION er byggð á sögu Maya Angelou af jasspíanista sem reynir að vinna úr fortíð sinni sem er lituð af rasisma. ... minna. ...
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Dabā viss ir krietni sarežģītāk kā spējam iedomāties. Īsumā piebildīšu, ka pamatā ir divu veidu pretestības spēki, kas bremzē slīdēšanu: 1) elektrostatiskā pievilkšanās pie sausās berzes mīnusos, kur nekāda ūdens plēvīte neveidojas, un jebkāds fluors ir absolūti bezjēdzīgs, 2) slapjā pielipšana, kad ūdens virsmas sprieguma spēki neļauj ūdens plēvītei plīst un veidojas lieli viskozi plēves laukumi, kas bremzē. Tad nu lūk otrajam gadījumam plēvi saraut palīdzēs flours un rupja specifiska plusu struktūra. Taisnības labad jāteic, ka sniega temperatūra nekad nav plusā un tā robeža starp plusu un mīnusu bāzi ir stipri peldoša un atkarīga gan no sniega struktūras, gan gaisa tempratūras un mitruma. Padomju savienībā ar šo problēmu sporta vajadzībām nodarbojās vesels institūtszinātniskā līmenī, ja nepaslinko, tad ar tā zinātniskajiem traktātiem krievu valodā var iepazīties arī tagad.. ...
V. Darrouzet, J. P. Erre, D. Dulon, M. Camicas Van Gout, J. M. Aran, P. A. Poutout, M. Négrevergne, R. Dauman, J. P. Bébéar (Bordeaux) ...
V. Darrouzet, J. P. Erre, D. Dulon, M. Camicas Van Gout, J. M. Aran, P. A. Poutout, M. Négrevergne, R. Dauman, J. P. Bébéar (Bordeaux) ...
V. Darrouzet, J. P. Erre, D. Dulon, M. Camicas Van Gout, J. M. Aran, P. A. Poutout, M. Négrevergne, R. Dauman, J. P. Bébéar (Bordeaux) ...
V. Darrouzet, J. P. Erre, D. Dulon, M. Camicas Van Gout, J. M. Aran, P. A. Poutout, M. Négrevergne, R. Dauman, J. P. Bébéar (Bordeaux) ...
View mouse Adora2a Chr10:75316877-75334784 with: phenotypes, sequences, polymorphisms, proteins, references, function, expression
View mouse Adora1 Chr1:134199225-134235431 with: phenotypes, sequences, polymorphisms, proteins, references, function, expression
從台灣市場購得舒黨Su-Dangshen (Codonopsis tubulosa)和紋黨Wun-Dang.(C. pilosula),分別用水萃取後,再經solid phase extraction (SPE) 濃縮乾燥,利用核磁共振光譜儀(1H-NMR)分析時,從舒黨發現兩個新四級銨鹽codotubulosine A和codotubulosine B 生物鹼。本篇論文將台灣及中國大陸市場收集各類黨參樣品共42個,利用1H-NMR分析定量各樣品中codotubulosine A、codotubulosine B 生物鹼及adenosine 和5-(hydroxymethyl)furfural之含量。分析結果在黨參、素花黨參、川黨參中以codotubulosine A 為主要成分,在管花黨參中以codotubulosine A 和B 為主要成分,新疆黨參、羊乳、金錢豹和球花黨參均未發現 codotubulosine A 和 B;目前台灣及中國大陸市場常用藥材,將黨參、舒黨、素花黨參和川黨參視為主要商品。因此本論文將codotubulosine A 和 B生物鹼,建議作為黨參之指標成分。利用SPE結合1H-NMR可快速鑑定市售黨參藥材的品種
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Here we report that male Ada-/- mice displayed features of priapism seen in humans, including spontaneous prolonged penile erection and increased CCS relaxation following neurostimulation with subsequent penile vascular damage and fibrosis. In addition, we demonstrated that reducing the accumulation of adenosine by ADA enzyme therapy relieved spontaneous prolonged penile erection and CCS relaxation both in vivo and in vitro. Moreover, the analysis of 4 adenosine receptor-deficient mice revealed that the A2BR is essential for adenosine-dependent penile vascular smooth muscle relaxation and erection and that upregulated A2BR signaling contributes to priapic activity in Ada-/- mice. Finally, we found that priapic activity in SCD transgenic mice was also due to elevated adenosine signaling via A2BR, suggesting a general contributory role of adenosine and A2BR signaling in priapism. Thus, although a role for adenosine signaling in priapism was initially suggested by an unexpected phenotype associated ...
Intra- and extracellular adenosine levels rise in response to physiological stimuli and with metabolic/energetic perturbations, inflammatory challenge and tissue injury. Extracellular adenosine engages members of the G-protein coupled adenosine receptor (AR) family to mediate generally beneficial acute and adaptive responses within all constituent cells of the heart. In this way the four AR sub-types - A1, A2A, A2B, and A 3Rs - regulate myocardial contraction, heart rate and conduction, adrenergic control, coronary vascular tone, cardiac and vascular growth, inflammatory-vascular cell interactions, and cellular stress-resistance, injury and death. The AR sub-types exert both distinct and overlapping effects, and may interact in mediating these cardiovascular responses. The roles of the ARs in beneficial modulation of cardiac and vascular function, growth and stress-resistance render them attractive therapeutic targets. However, interactions between ARs and with other receptors, and their ubiquitous
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The causes of chronic heart failure (CHF) and its progression are likely to be due to complex genetic factors. Adenosine receptors A2A and A2B (ADORA2A and ADORA2B, respectively) play an important role in cardio-protection. Therefore, polymorphisms in the genes encoding those receptors may affect the risk and severity of CHF. This study was a case-control comparative investigation of 300 northern Chinese Han CHF patients and 400 ethnicity-matched healthy controls. Four common single-nucleotide polymorphisms (SNPs) of ADORA2A (rs2236625, rs2236624, rs4822489, and rs5751876) and one SNP of ADORA2B (rs7208480) were genotyped and an association between SNPs and clinical outcomes was evaluated. Odds ratios (ORs) with 95% confidence intervals (CIs) were used to assess the association. The rs4822489 was significantly associated with the severity of CHF after adjustment for traditional cardiovascular risk factors (p = 0.040, OR = 1.912, 95% CI = 1.029-3.550). However, the five SNPs as well as the
The adenosine A2A receptor, also known as ADORA2A, is an adenosine receptor, and also denotes the human gene encoding it. This protein is a member of the G protein-coupled receptor (GPCR) family which possess seven transmembrane alpha helices. The crystallographic structure of the adenosine A2A receptor reveals a ligand binding pocket distinct from that of other structurally determined GPCRs (i.e., the beta-2 adrenergic receptor and rhodopsin). The actions of the A2A receptor are complicated by the fact that a variety of functional heteromers composed of a mixture of A2A subunits with subunits from other unrelated G-protein coupled receptors have been found in the brain, adding a further degree of complexity to the role of adenosine in modulation of neuronal activity. Heteromers consisting of adenosine A1/A2A, dopamine D2/A2A and D3/A2A, glutamate mGluR5/A2A and cannabinoid CB1/A2A have all been observed, as well as CB1/A2A/D2 heterotrimers, and the functional significance and endogenous role of ...
Read A3 Adenosine Receptors from Cell Biology to Pharmacology and Therapeutics by with Rakuten Kobo. This book, with its 16 chapters, documents the present state of knowledge of the adenosine A receptor. It covers a wide ...
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GABA B Receptor 2 antibody [N2C1], Internal (gamma-aminobutyric acid (GABA) B receptor, 2) for IHC-Fr, WB. Anti-GABA B Receptor 2 pAb (GTX105986) is tested in Human, Rat samples. 100% Ab-Assurance.
The protein encoded by this gene is an adenosine receptor that belongs to the G-protein coupled receptor 1 family. There are 3 types of adenosine receptors, each with a specific pattern of ligand binding and tissue distribution, and together they regulate…
Adenosine is a ubiquitous signaling molecule whose physiological functions are mediated by its interaction with four G-protein-coupled receptor subtypes, termed A(1), A(2A), A(2B) and A(3). As a result of increased metabolic rates, this nucleoside is released from a variety of cells throughout the b …
Viesturs Baumanis ,MD, PhD, profesors, LU BMC vadošais pētnieks ir viens no molekulārās bioloģijas un bioķīmisko procesu molekulārās izpētes pamatlicējiem Latvijā. Pēc pamatprofesijas viņs ir ārsts, kura interese par cilvēku laika gaitā ir paplašinājusies ar dzīvo radību cilvēkā un ap cilvēku, proti, mikrobioloģiju. Pētījumi par E.coli un tā bakteriofāgu struktūru un to mijiedarbības dinamiku OSI Nukleinskābju pētniecības laboratorijā 1969-1977 gados lielā mērā bija sekmīgi, pateicoties V.Baumaņa mikrobiologu grupas precīzam darbam. Jāatzīme ka uz šī pamata vēlāk attīstījās un sekmīgi izvērtās genu inženierijas metodes BMC un uz tām balstītu jaunu zāļu radīšana.V.Baumanis ir piedalījies rekombinanto interleikina 2 un α-atrija natriuretiskā faktora radīšanā.. No 1997 gada līdz šai dienai notiek Latvijā izplatīto Mycobacterium tuberculosis klīnisko izolātu izpēte .Sadarbībā ar Infektoloģijas centra Tuberkulozes un plaušu ...
Latvijas Cilvēktiesību centrs sadarbībā ar Lietuvas Cilvēktiesību uzraudzības institūtu 27.-28.novembrī organizēja starptautisku konferenci „Eiropas Savienības Pamattiesību harta un pilsoniskās sabiedrības loma pamattiesību veicināšanā.
Breakdown of excessive amounts of adenosine triphosphate (ATP), the main energy source of a cell, leads to the formation of extracellular adenosine, an important signaling molecule involved in multiple pathways that regulate neuronal and immunological function. Adenosine is either actively produced by certain cells or is released from damaged tissue, particularly when cells are starved of oxygen. Adenosine levels are tightly regulated at all points throughout its production, release, uptake and degradation, and disruptions in control that result in excessively high levels are associated with a number of human pathologies, including severe combined immunodeficiency (SCID).. The diversity in the regulation and function of adenosine (both of which differ in a tissue- and cell-specific manner) means that it has been difficult to unravel its exact role at the molecular level. In addition, data obtained in vitro, or in tissue culture, might not be relevant to whole organisms, and mammalian model ...
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マウス・モノクローナル抗体 ab55051 交差種: Ms,Rat,Hu 適用: WB,IHC-FoFr,IHC-Fr,Flow Cyt,ICC/IF…GABA B Receptor 1抗体一覧…画像、プロトコール、文献などWeb上の情報が満載のアブカムの…
Adenosine A3 receptors are involved in a variety of intracellular signaling pathways and physiological functions. They are expressed in a wide range of human tissues, but most predominantly in the lung and liver. Recent animal model studies have shown that A3 receptors play important roles in brain ischemia, immunosuppresion, and bronchospasm. A3 receptor agonists and/or agonists ...
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