Effect of Tandospirone on Sleep Latency in Rats Placed on a Grid Suspended Over Water

DOI Web Site 被引用文献5件 参考文献31件
  • Utsu Yoshiaki
    Department of Medicinal Pharmacology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
  • Shinomiya Kazuaki
    Department of Pharmaceutical Care and Health Sciences, Faculty of Pharmaceutical Sciences, Okayama University, Japan
  • Tokunaga Shin
    Department of Medicinal Pharmacology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
  • Ohmori Asae
    Department of Medicinal Pharmacology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
  • Kamei Chiaki
    Department of Medicinal Pharmacology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan

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The present study was performed to examine the effect of tandospirone on sleep latency in a new insomnia animal model by placing rats on a grid suspended over water. For investigating the mechanism of tandospirone, the effect of tandospirone on sleep latency was also studied using rats that were depleted with neuronal serotonin (5-HT) after p-chlorophenylalanine administration. Tandospirone caused a shortening of sleep latency dose-dependently, and a significant effect was observed at 20 mg/kg, p.o. or more. A shortening of sleep latency was observed by administration of p-chlorophenylalanine (300 mg/kg, i.p.) for 2 days. On the other hand, tandospirone exerted no potentiating effect on the shortening of sleep latency induced by p-chlorophenylalanine. From these findings, a shortening of sleep latency induced by tandospirone may occur through the pre-synaptic 5-HT1A receptors in rats.<br>

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