Linked Life Data

15187170

Source:http://linkedlifedata.com/resource/pubmed/id/15187170

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2004-9-17
pubmed:abstractText
The antigen-induced release of histamine from sensitized guinea pig mast cells was dose-dependently reduced by endogenous (2-arachidonylglycerol; 2AG) and exogenous [(1R,3R,4R)-3-[2-hydroxy-4-(1,1-dimethylheptyl)phenyl]-4-(3-hydroxypropyl)cyclohexan-1-ol (CP55,940)] cannabinoids. The inhibitory action afforded by 2AG and CP55,940 was reversed by N-[(1S)-endo-1,3,3-trimethylbicyclo[2.2.1]heptan-2-yl]5-(4-chloro-3-methylphenyl)-1-(4-methylbenzyl)pyrazole-3-carboxamide (SR144528), a selective cannabinoid 2 (CB(2)) receptor antagonist, and left unchanged by the selective CB(1) antagonist N-(piperidin-1-yl)-5-(4-iodophenyl)-1-(2,4-dichlorophenyl)-4-methyl-1H-pyrazole-3-carboxamide (AM251). The inhibitory action of 2AG and CP55,940 was reduced by the unselective nitric-oxide synthase (NOS) inhibitor N-monomethyl-L-arginine methylester (l-NAME) and reinstated by L-arginine, the physiological substrate. The inhibitory action of 2AG and CP55,940 was also reduced by the unselective cyclooxygenase (COX) inhibitor indomethacin and the selective COX-2 blocker rofecoxib. Both 2AG and CP55,940 significantly increased the production of nitrite from mast cells, which was abrogated by L-NAME and N-(3-(aminomethyl)benzyl)acetamidine (1400W), a selective inducible NOS (iNOS) inhibitor. Nitrite production consistently paralleled a CP55,940-induced increase in the expression of iNOS protein in mast cells. Both 2AG and CP55,940 increased the generation of prostaglandin E(2) from mast cells, which was abrogated by indomethacin and rofecoxib and parallel to the CP55,940-induced expression of COX-2 protein. Mast cell challenge with antigen was accompanied by a net increase in intracellular calcium levels. Both cannabinoid receptor ligands decreased the intracellular calcium levels, which were reversed by SR144528 and l-NAME. In unstimulated mast cells, both ligands increased cGMP levels. The increase was abrogated by SR144528, l-NAME, indomethacin, and rofecoxib. Our results suggest that 2AG and CP55,940 decreased mast cell activation in a manner that is susceptible to a CB(2) receptor antagonist and to inhibition of nitric oxide and prostanoid pathways.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
http://linkedlifedata.com/resource/pubmed/chemical/2-arachidonylglycerol, http://linkedlifedata.com/resource/pubmed/chemical/3-(2-hydroxy-4-(1,1-dimethylheptyl)p..., http://linkedlifedata.com/resource/pubmed/chemical/Arachidonic Acids, http://linkedlifedata.com/resource/pubmed/chemical/Cyclohexanols, http://linkedlifedata.com/resource/pubmed/chemical/Eicosanoids, http://linkedlifedata.com/resource/pubmed/chemical/Endocannabinoids, http://linkedlifedata.com/resource/pubmed/chemical/Enzyme Inhibitors, http://linkedlifedata.com/resource/pubmed/chemical/Glycerides, http://linkedlifedata.com/resource/pubmed/chemical/Immunosuppressive Agents, http://linkedlifedata.com/resource/pubmed/chemical/NG-Nitroarginine Methyl Ester, http://linkedlifedata.com/resource/pubmed/chemical/Nitric Oxide, http://linkedlifedata.com/resource/pubmed/chemical/Receptor, Cannabinoid, CB2
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0022-3565
pubmed:author
pubmed:issnType
Print
pubmed:volume
311
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
256-64
pubmed:dateRevised
2007-7-6
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
The endocannabinoid 2-arachidonylglycerol decreases the immunological activation of Guinea pig mast cells: involvement of nitric oxide and eicosanoids.
pubmed:affiliation
Department of Preclinical and Clinical Pharmacology, University of Florence, Viale G. Pier-accini, n 6, 50139 Florence, Italy.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't