Evaluation of opioid receptor subtype antagonist effects in the ventral tegmental area upon food intake under deprivation, glucoprivic and palatable conditions

Opioid receptor subtype antagonists differentially alter food intake under deprivation (24 h), glucoprivic (2-deoxy- d-glucose, 500 mg/kg, i.p.) or palatable (10% sucrose) conditions with μ (β-funaltrexamine) and κ (nor-binaltorphamine), but not δ 1 ([ d-Ala 2,Leu 5,Cys 6]enkephalin) opioid antagoni...

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