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http://dx.doi.org/10.5352/JLS.2007.17.11.1576

Effect of Ondansetron Alone and Combination of Naltrexone and Ondansetron on Alcohol Intake in C57BL/6 Mice  

Kim, Hyeun-Kyeung (Medical Research Institute, Pusan National University Hospital)
Kim, Sung-Gon (Department of Pshychiatry, Pusan National University)
Kang, Cheol-Joong (Department of Pshychiatry, Pusan National University)
Park, Sang-Ick (Division of Intractable Disease, Center for Biomedical Science, National Institute of Health)
Kim, Won-Ho (Division of Intractable Disease, Center for Biomedical Science, National Institute of Health)
Publication Information
Journal of Life Science / v.17, no.11, 2007 , pp. 1576-1581 More about this Journal
Abstract
Dopamine reward pathway projecting from ventral tegmental area to nucleus accumbens is well known as playing an important role in alcohol dependence. It is supposed that this dopamine pathway is modulated by $5-HT_3$ nervous system, and it was reported that ondansetron (OND), $5-HT_3$ receptor antagonist, reduced drinking amount and increased abstinence rate in alcohol-dependent patients. The purpose of this study is to investigate the effect of combination of OND and naltrexone (NTX), non-specific opioid receptor antagonist, on alcohol intake in C57BL/6 mice. In 40 C57BL/6 mice in the state of alcohol dependence, vehicle, while OND 0.01 mg/kg, or NTX 1.0 mg/kg administrated respectively, or OND 0.01 mg/kg and NTX 1.0 mg/kg administrated simultaneously for ten days, medication effects on 2-hr alcohol, 22-hr water, 24-hr food intake and body weight were studied. When vehicle group was compared with 3 medication groups respectively, using a repeated measure ANOVA, NTX alone and vehicle groups showed a significant medication by time interaction (p=0.042) in 2-hr alcohol intake, but in the other 2 groups, OND and NTX combination group and OND alone group, there was no significant interaction with vehicle group in 2-hr alcohol intake. From these results, it is suggested that there is no effect on alcohol intake in mice treating with OND, and naltrexone#s suppression effect on alcohol intake in mice is attenuated when treating with OND and NTX simultaneously. It is supposed that a further study looking at the interactions of serotonin, dopamine and opioid nerves systems will be needed.
Keywords
Naltrexone; ondansetron; combine; alcohol intake; C57BL/6 mice;
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