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Proteinase-activated receptor-1 agonists attenuate nociception in response to noxious stimuli.

Authors: Asfaha, S  Brussee, V  Chapman, K  Zochodne, DW  Vergnolle, N 
Citation: Asfaha S, etal., Br J Pharmacol. 2002 Mar;135(5):1101-6.
Pubmed: (View Article at PubMed) PMID:11877315
DOI: Full-text: DOI:10.1038/sj.bjp.0704568

Proteinase-activated receptor-1 (PAR-1) is activated by thrombin and can be selectively activated by synthetic peptides (PAR-1-activating peptide: PAR-1-AP) corresponding to the receptor's tethered ligand. PAR-1 being expressed by afferent neurons, we investigated the effects of PAR-1 agonists on nociceptive responses to mechanical and thermal noxious stimuli. Intraplantar injection of selective PAR-1-AP increased nociceptive threshold and withdrawal latency, leading to mechanical and thermal analgesia, while control peptide had no effect. Intraplantar injection of thrombin also showed analgesic properties in response to mechanical, but not to thermal stimulus. Co-injection of PAR-1-AP with carrageenan significantly reduced carrageenan-induced mechanical and thermal hyperalgesia, while thrombin reduced carrageenan-induced mechanical but not thermal hyperalgesia. The fact that thrombin is not a selective agonist for PAR-1 may explain the different effects of thrombin and PAR-1-AP. These results identified analgesic properties for selective PAR-1 agonists that can modulate nociceptive response to noxious stimuli in normal and inflammatory conditions.

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RGD ID: 7387271
Created: 2013-10-25
Species: All species
Last Modified: 2013-10-25
Status: ACTIVE



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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.