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Paper   IPM / Cognitive Sciences / 8823
School of Cognitive Sciences
  Title:   Involvement of glucose and ATP-sensitive potassium (K+) channels on morphine-induced conditioned place preference
  Author(s): 
1.  A. Khalilzadeh
2.  M. Sattari-Naeini
3.  M.R. Zarrindast
  Status:   Published
  Journal: EUR J PHARMACOL
  Vol.:  573
  Year:  2007
  Pages:   133-8
  Supported by:  IPM
  Abstract:
In the present study, the effects of glucose and ATP-sensitive K+ channel compounds on the acquisition of morphine-induced place preference in male mice were investigated. Subcutaneous administration of different doses of morphine (2.5-7.5 mg/kg) produced a dose-dependent conditioned place preference. With a 3-day conditioning schedule, it was found that glucose (100, 200, 500 and 1000 mg/kg), diazoxide (15, 30 and 60 mg/kg) or glibenclamide (3, 6 and 12 mg/kg) did not produce significant place preference or place aversion. Intraperitoneal administration of the glucose (1000 mg/kg) or glibenclamide (6 and 12 mg/kg) with a lower dose of morphine (0.5 mg/kg) elicited the significant conditioned place preference. The response of glibenclamide (6 mg/kg) was reversed by diazoxide (15, 30 and 60 mg/kg). Drug injections had no effects on locomotor activity during the test sessions. It is concluded that glucose and the ATP-sensitive K+ channel may play an active role in morphine reward.

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