Phencyclidine-induced wet-dog shakes observed in rats after withdrawal from reserpine treatment

Toshitaka Nabeshima, Kazumasa Yamaguchi, Shigeru Yoshida, Hiroshi Furukawa, Tsutomu Kameyama

Research output: Contribution to journalArticle

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Abstract

This study was designed to assess the involvement of serotonergic neurons in phenycyclidine (PCP)-induced wet-dog shakes in rats after termination of reserpine treatment. Administration of L-5-hydroxytryptophan (7.5-12.5 mg/kg) to rats 30 min following pretreatment with pargyline induced wet-dog shakes which included head shake and whole body shake. p-Chloroamphetamine (PCA) (5 mg/kg) alone also produced wet-dog shakes in the vehicle-pretreated rats, but PCP (2.5-7.5 mg/kg) and tryptophan (100 mg/kg) alone did not. The number of wet-dog shakes significantly increased after the injection of PCA (2.5 and 5 mg/kg) in the reserpine-pretreated rats, in which the 5-hydroxyindoleacetic acid/serotonin (5-HT) ratio was significantly higher and postsynaptic 5-HT receptors were also in a state of supersensitivity, compared to that of the vehicle-pretreated rats. PCP (2.5-7.5 mg/kg) also produced wet-dog shakes in a dose-dependent fashion in rats after pretreatment with reserpine. Furthermore, PCP-induced wet-dog shakes were potentiated by imipramine, a 5-HT-uptake blocker, and prevented by mianserin, a 5-HT receptor-blocker. Tryptophan (100 mg/kg) alone produced wet-dog shakes in the reserpine-pretreated rats and it was enhanced in combination with imipramine. These results may indicate that the PCP-induced wet-dog shakes after reserpine withdrawal are due to an increased release of 5-HT from the functional pool and supersensitivity of postsynaptic 5-HT receptors.

Original languageEnglish
Pages (from-to)1275-1279
Number of pages5
JournalPharmacology, Biochemistry and Behavior
Volume24
Issue number5
DOIs
Publication statusPublished - 01-01-1986
Externally publishedYes

Fingerprint

Phencyclidine
Reserpine
Hydroxyindoleacetic Acid
Rats
Dogs
p-Chloroamphetamine
Serotonin
Imipramine
Serotonin Receptors
Tryptophan
Therapeutics
Mianserin
Pargyline
5-Hydroxytryptophan
Serotonin Antagonists
Serotonergic Neurons
Neurons
Head
Injections

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Toxicology
  • Pharmacology
  • Clinical Biochemistry
  • Biological Psychiatry
  • Behavioral Neuroscience

Cite this

Nabeshima, Toshitaka ; Yamaguchi, Kazumasa ; Yoshida, Shigeru ; Furukawa, Hiroshi ; Kameyama, Tsutomu. / Phencyclidine-induced wet-dog shakes observed in rats after withdrawal from reserpine treatment. In: Pharmacology, Biochemistry and Behavior. 1986 ; Vol. 24, No. 5. pp. 1275-1279.
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abstract = "This study was designed to assess the involvement of serotonergic neurons in phenycyclidine (PCP)-induced wet-dog shakes in rats after termination of reserpine treatment. Administration of L-5-hydroxytryptophan (7.5-12.5 mg/kg) to rats 30 min following pretreatment with pargyline induced wet-dog shakes which included head shake and whole body shake. p-Chloroamphetamine (PCA) (5 mg/kg) alone also produced wet-dog shakes in the vehicle-pretreated rats, but PCP (2.5-7.5 mg/kg) and tryptophan (100 mg/kg) alone did not. The number of wet-dog shakes significantly increased after the injection of PCA (2.5 and 5 mg/kg) in the reserpine-pretreated rats, in which the 5-hydroxyindoleacetic acid/serotonin (5-HT) ratio was significantly higher and postsynaptic 5-HT receptors were also in a state of supersensitivity, compared to that of the vehicle-pretreated rats. PCP (2.5-7.5 mg/kg) also produced wet-dog shakes in a dose-dependent fashion in rats after pretreatment with reserpine. Furthermore, PCP-induced wet-dog shakes were potentiated by imipramine, a 5-HT-uptake blocker, and prevented by mianserin, a 5-HT receptor-blocker. Tryptophan (100 mg/kg) alone produced wet-dog shakes in the reserpine-pretreated rats and it was enhanced in combination with imipramine. These results may indicate that the PCP-induced wet-dog shakes after reserpine withdrawal are due to an increased release of 5-HT from the functional pool and supersensitivity of postsynaptic 5-HT receptors.",
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Phencyclidine-induced wet-dog shakes observed in rats after withdrawal from reserpine treatment. / Nabeshima, Toshitaka; Yamaguchi, Kazumasa; Yoshida, Shigeru; Furukawa, Hiroshi; Kameyama, Tsutomu.

In: Pharmacology, Biochemistry and Behavior, Vol. 24, No. 5, 01.01.1986, p. 1275-1279.

Research output: Contribution to journalArticle

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