Psychopharmacologia

, Volume 44, Issue 3, pp 297–300 | Cite as

Behavioral supersensitivity to 5-hydroxytryptophan induced by chronic methysergide pretreatment

  • Harold L. Klawans
  • D. J. D'Amico
  • B. C. Patel
Short Reports Animal Studies

Abstract

The administration of 5-hydroxytryptophan to intact guinea pigs results in rhythmic myoclonic behavior. This behavior is blocked acutely by methysergide, but is intensified in animals chronically pretreated with methysergide. Brain serotonin concentrations of guinea pigs pretreated with methysergide did not differ from saline-treated animals. These results are compatible with the hypothesis that prolonged methysergide administration can result in pharmacologically-induced denervation hypersensitivity at central serotonin receptors.

Key words

Methysergide Denervation supersensitivity Serotonin 5-Hydroxytryptophan-induced myoclonic behavior 

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Copyright information

© Springer-Verlag 1975

Authors and Affiliations

  • Harold L. Klawans
    • 1
  • D. J. D'Amico
    • 2
  • B. C. Patel
    • 3
  1. 1.Division of Neurology, Michael Reese Hospital and Medical Center and Department of MedicineUniversity of Chicago, Pritzker School of MedicineChicago
  2. 2.Abraham Lincoln School of MedicineUniversity of IllinoisChicago
  3. 3.Division of NeurologyMichael Reese Hospital and Medical CenterChicago

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