Linked Life Data

17159162

Source:http://linkedlifedata.com/resource/pubmed/id/17159162

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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2007-2-16
pubmed:abstractText
It has been previously proposed that adenosine plays an important role in the pathogenesis of asthma. The proposed mechanism of action for nucleoside adenosine is to activate A(2B) adenosine receptors (AR) and to indirectly modulate levels of mediators in the lung. In vivo data supporting the role of A(2B) AR in airway reactivity and inflammation in allergic animal models are lacking. The present study describes the effects of a selective A(2B) AR antagonist, CVT-6883 [3-ethyl-1-propyl-8-[1-(3-trifluoromethylbenzyl)-1H-pyrazol-4-yl]-3,7-dihydropurine-2,6-dione], on airway reactivity and inflammation in an allergic mouse model of asthma. Mice were sensitized with ragweed (i.p.) on days 1 and 6 and challenged with 0.5% ragweed on days 11, 12, and 13. On day 14, airway reactivity to 5'-N-ethylcarboxamidoadenosine (NECA), AMP, or allergen challenge was measured in terms of enhanced pause (Penh). Aerosolized NECA elicited concentration-dependent increases in Penh, which were significantly attenuated by CVT-6883 (0.4, 1.0, or 2.5 mg/kg i.p.). Aerosolized AMP elicited significant increases in Penh in sensitized mice, and the effect was significantly attenuated by either CVT-6883 (1 mg/kg i.p.) or montelukast (1 mg/kg i.p.). Allergen challenge induced late allergic response in sensitized mice, which was inhibited by CVT-6883 (1 mg/kg i.p.). Allergen challenge also increased the number of cells in bronchoalveolar lavage fluid obtained from sensitized mice, and that was reduced by either CVT-6883 (6 mg/ml aerosolization for 5 min) or theophylline (36 mg/ml aerosolization for 5 min). These results suggest that A(2B)AR antagonism plays an important role in inhibition of airway reactivity and inflammation in this model of allergic asthma.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0022-3565
pubmed:author
pubmed:issnType
Print
pubmed:volume
320
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1246-51
pubmed:dateRevised
2010-11-18
pubmed:meshHeading
pubmed-meshheading:17159162-Adenosine, pubmed-meshheading:17159162-Adenosine A2 Receptor Antagonists, pubmed-meshheading:17159162-Adenosine Monophosphate, pubmed-meshheading:17159162-Adenosine-5'-(N-ethylcarboxamide), pubmed-meshheading:17159162-Administration, Inhalation, pubmed-meshheading:17159162-Aerosols, pubmed-meshheading:17159162-Allergens, pubmed-meshheading:17159162-Animals, pubmed-meshheading:17159162-Asthma, pubmed-meshheading:17159162-Bronchoalveolar Lavage Fluid, pubmed-meshheading:17159162-Bronchoconstriction, pubmed-meshheading:17159162-Bronchodilator Agents, pubmed-meshheading:17159162-Disease Models, Animal, pubmed-meshheading:17159162-Dose-Response Relationship, Drug, pubmed-meshheading:17159162-Mice, pubmed-meshheading:17159162-Mice, Inbred Strains, pubmed-meshheading:17159162-Plethysmography, pubmed-meshheading:17159162-Purines, pubmed-meshheading:17159162-Pyrazoles
pubmed:year
2007
pubmed:articleTitle
Effect of a specific and selective A(2B) adenosine receptor antagonist on adenosine agonist AMP and allergen-induced airway responsiveness and cellular influx in a mouse model of asthma.
pubmed:affiliation
Department of Physiology and Pharmacology, School of Medicine, West Virginia University, Morgantown, WV 26506, USA. smustafa@hsc.wvu.edu
pubmed:publicationType
Journal Article