| Autor: |
Li Yonghui, Zheng Xigeng, Bai Yunjing, Yang Xiaoyan, Sui Nan |
| Předmět: |
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| Zdroj: |
Journal of Psychopharmacology; Jan2006, Vol. 20 Issue 1, p40-46, 7p, 4 Graphs |
| Abstrakt: |
Behavioural studies have provided strong evidence for common substrates in the rewards of natural and addictive substances, but it is stilt unclear whether there is a common glutamatergic NMDA receptor mechanism involved in the processing of reward for both. The present study was designed to investigate the effects of MK-801 (0.1 mg/kg) on the expression of place preference conditioned with food and morphine (5.0 mg/kg) in rats. The data indicates that MK-801 potentiates the expression of food-induced conditioned place preference (CPP) but retards that of morphine CPP. It also demonstrates that the opposite effects of MK-801 on food and morphine CPP expression were caused neither by hyperactivity nor by the impairment of memory retrieval. These results suggest that MK-801 enhances food craving and inhibits morphine craving in rats, and that the rotes of glutamatergic NMDA receptor mechanisms in the reward processing of natural reinforcers and addictive drugs may be dissociable. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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