Involvement of Serotonergic Receptor Subtypes in the Production of Antinociception by Psychological Stress in Mice

The Japanese Journal of Pharmacology

Masakatsu Takahashi¹  Hiroshi Kaneto¹  Shogo Tokuyama¹ 

[1] Department of Pharmacology, Faculty of Pharmaceutical Sciences, Nagasaki University

关键词: Communication box;    Stress-induced analgesia (SIA);    Serotonin (5-HT);    Buspirone;    Morphine tolerance;   

DOI  :  10.1254/jjp.61.237

学科分类：药理学

来源: Nihon Yakuri Gakkai Henshuubu / Japanese Pharmacological Society

【 摘 要 】

References(33)Cited-By(5)Besides the important role of emotional factors in the production of psychological-stress-induced analgesia (PSY-SIA), recent attention to the participation of serotonergic (5-HTnergic)neurons in the fear and anxiety-evoking mechanism led us to examine the effects of 5-HTnergic ligands on PSY-SIA. Pretreatment of mice with 2.0 to 10 mg/kg of methysergide, a 5-HT receptor antagonist, or 1.0 to 10 mg/kg of buspirone, a 5-HT1A receptor partial agonist, dose-dependently suppressed the production of PSY-SIA. Ritanserin, a 5-HT2 receptor antagonist, 1.0 to 5.0 mg/kg, or Y-25, 130, a 5-HT3 receptor antagonist, 0.03 and 0.1 mg/kg, also inhibited PSY-SIA dose-dependently, while (±)pindolol, a 5-HT1A/1B receptor antagonist, was ineffective at doses up to 3.0 mg/kg. Furthermore, the suppressive effect of PSY-stress on the development of antinociceptive tolerance to morphine was also antagonized by methysergide, buspirone, ritanserin and Y-25, 130, but not by (±)pindolol. These results suggest that 5-HT receptor (5-HT1A, 5-HT2 and 5-HT3 but not 5-HT1B)-mediated mechanisms play an important role in the production of PSY-SIA.

【 授权许可】

Unknown