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Type: Artigo de periódico
Title: 5-ht Induces Temporomandibular Joint Nociception In Rats Through The Local Release Of Inflammatory Mediators And Activation Of Local β Adrenoceptors.
Author: Oliveira-Fusaro, Maria Cláudia G
Clemente-Napimoga, Juliana Trindade
Teixeira, Juliana Maia
Torres-Chávez, Karla Elena
Parada, Carlos Amílcar
Tambeli, Cláudia Herrera
Abstract: The 5-hydroxytryptamine (serotonin, 5-HT) is an important inflammatory mediator found in high levels in the synovial fluid of the temporomandibular joint (TMJ) of patients with inflammatory pain. In this study, we used the nociceptive behavior responses, measured as flinching the head and rubbing the orofacial region, as a nociceptive assay. We demonstrated that the local blockade of the 5-HT₃ receptor and β₁ or β₂-adrenoceptors, the depletion of norepinephrine in the sympathetic terminals and the local inhibition of cyclooxygenase significantly reduced 5-HT-induced TMJ nociception. These results demonstrated that 5-HT induces nociception in the TMJ region by the activation of β₁ and β₂ adrenoceptors located in the TMJ region and local release of sympathetic amines and prostaglandins. Therefore, the high levels of 5-HT in the synovial fluid of patients with TMJ inflammatory pain may contribute to TMJ pain by similar mechanisms.
Subject: Adrenergic Beta-agonists
Adrenergic Beta-antagonists
Anti-inflammatory Agents, Non-steroidal
Cell Movement
Facial Pain
Inflammation Mediators
Pain Measurement
Rats, Wistar
Receptors, Adrenergic, Beta
Sympathetic Nervous System
Temporomandibular Joint
Temporomandibular Joint Disorders
Rights: fechado
Identifier DOI: 10.1016/j.pbb.2012.06.005
Date Issue: 2012
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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