Linked Life Data

21440042

Source:http://linkedlifedata.com/resource/pubmed/id/21440042

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2011-4-25
pubmed:abstractText
Prostaglandin E(2) (PGE(2)) is a key mediator of exaggerated pain sensation during inflammation. Drugs targeting the PGE(2) pathway by global inhibition of cyclooxygenases are well established in the treatment of inflammatory pain, but also cause significant unwanted effects. Enzymes downstream of the cyclooxygenases, or prostaglandin receptors are candidate targets possibly enabling therapeutic intervention with potentially fewer side effects. Among the PGE(2) receptors, the EP1 subtype has repeatedly been proposed as a promising target for treatment of inflammatory hyperalgesia. However its involvement in sensitization at specific (peripheral or central) sites has not been thoroughly investigated. Here, we have used mice deficient in the EP1 receptor (EP1(-/-)) to address this issue. EP1(-/-) mice showed normal mechanical and heat sensitivity during baseline conditions. Local subcutaneous PGE(2) injection into one hindpaw, caused thermal and mechanical sensitization in wild-type mice and EP1(-/-) mice. Thermal sensitization in EP1(-/-) mice was less than in wild-type mice while no significant difference was seen for mechanical sensitization. Injection of PGE(2) into the subarachnoid space of the lumbar spinal cord, resulted in a similar mechanical sensitization in EP1(-/-) mice and in wild-type mice, while a tendency towards reduced reaction to noxious heat stimulation was observed in EP1(-/-) mice. These results support a major contribution of EP1 receptors to peripheral heat sensitization, but only a minor role in mechanical sensitization and in spinal heat sensitization by PGE(2). After local subcutaneous zymosan A injection, EP1(-/-) mice showed indistinguishable mechanical and heat sensitization compared with wild-type mice. Taken together, these results suggest that peripheral EP1 receptors contribute significantly to inflammation induced heat pain sensitization while evidence for a contribution to central sensitization was not obtained.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
1872-7972
pubmed:author
pubmed:copyrightInfo
Copyright © 2011 Elsevier Ireland Ltd. All rights reserved.
pubmed:issnType
Electronic
pubmed:day
16
pubmed:volume
495
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
98-101
pubmed:meshHeading
pubmed:year
2011
pubmed:articleTitle
Contribution of peripheral versus central EP1 prostaglandin receptors to inflammatory pain.
pubmed:affiliation
Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't