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Inhibitory effects of MK-801 on contextual sensitization to climbing behavior and on development of tolerance to hypothermia induced by a single high dose of apomorphine

  • Jae Suk Yun
  • , Hack Seang Kim
  • , Myung Koo Lee
  • , Ki Wan Oh
  • , Choon Gon Jang
  • , Woo Kyu Park
  • , Yeon Hee Seong
  • , Soon Chul Lee
  • , Sei Kwan Oh

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

A single high dose of apomorphine (10 mg kg-1) produced not only contextual sensitization to and conditioning of climbing behavior, but also context-independent tolerance to hypothermia. MK-801 (0.15 and 0.3 mg kg-1) inhibited contextual sensitization to and conditioning of climbing behavior. Development of tolerance to hypothermia was also inhibited by MK-801. Dopamine D1 antagonist, SCH23390 (0.5 mg kg-1), but not D2 antagonist, sulpiride, inhibited sensitization to and conditioning of climbing behavior. D2 antagonist, sulpiride (50 mg kg-1), but not D1 antagonist, SCH23390, inhibited development of tolerance to hypothermia. These results suggest that MK-801 inhibited contextual sensitization to climbing behavior and development of tolerance to hypothermia through glutamatergic modulation of dopaminergic functions at dopamine receptors.

Original languageEnglish
Pages (from-to)473-479
Number of pages7
JournalPharmacological Research
Volume44
Issue number6
DOIs
StatePublished - 2001

Bibliographical note

Funding Information:
The authors wish to acknowledge the financial support of the Brain Korea 21 project of the Ministry of Education of the Republic of Korea.

Keywords

  • Apomorphine
  • Climbing behavior
  • Conditioning
  • Contextual sensitization
  • Hypothermia
  • MK-801
  • SCH23390
  • Sulpiride

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