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• W2095468181 abstract "This work aimed to evaluate the potential role of the 5-HT7 receptor in nociception secondary to a sensitizing stimulus in mice. For this purpose, the effects of relevant ligands (5-HT7 receptor agonists: AS-19, MSD-5a, E-55888; 5-HT7 receptor antagonists: SB-258719, SB-269970; 5-HT1A receptor agonist: F-13640; 5-HT1A receptor antagonist: WAY-100635) were assessed on capsaicin-induced mechanical hypersensitivity, a pain behavior involving hypersensitivity of dorsal horn neurons (central sensitization). For the 5-HT7 receptor agonists used, binding profile and intrinsic efficacy to stimulate cAMP formation in HEK-293F cells expressing the human 5-HT7 receptor were also evaluated. AS-19 and E-55888 were selective for 5-HT7 receptors. E-55888 was a full agonist whereas AS-19 and MSD-5a behaved as partial agonists, with maximal effects corresponding to 77% and 61%, respectively, of the cAMP response evoked by the full agonist 5-HT. Our in vivo results revealed that systemic administration of 5-HT7 receptor agonists exerted a clear-cut dose-dependent antinociceptive effect that was prevented by 5-HT7 receptor antagonists, but not by the 5-HT1A receptor antagonist. The order of efficacy (E-55888 > AS-19 > MSD-5a) matched their in vitro efficacy as 5-HT7 receptor agonists. Contrary to agonists, a dose-dependent promotion of mechanical hypersensitivity was observed after administration of 5-HT7 receptor antagonists, substantiating the involvement of the 5-HT7 receptor in the control of capsaicin-induced mechanical hypersensitivity. These findings suggest that serotonin exerts an inhibitory role in the control of nociception through activation of 5-HT7 receptors, and point to a new potential therapeutic use of 5-HT7 receptor agonists in the field of analgesia." @default.
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• W2095468181 date "2009-02-01" @default.
• W2095468181 modified "2023-10-18" @default.
• W2095468181 title "5-HT7 receptor activation inhibits mechanical hypersensitivity secondary to capsaicin sensitization in mice" @default.
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• W2095468181 doi "https://doi.org/10.1016/j.pain.2008.11.009" @default.
• W2095468181 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19118950" @default.
• W2095468181 hasPublicationYear "2009" @default.
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