This study shows that single (15 mg/kg) or binge (3x15 mg/kg) cocaine administration increases c-fos mRNA levels, but only binge cocaine administration increases preprodynorphin mRNA levels in the caudate/putamen of Fischer rats. This increase in both c-fos and preprodynorphin mRNA levels is attenuated by the noncompetitive NMDA antagonist MK-801 (0.25 mg/kg), suggesting a preferential role for NMDA receptor co-activation in cellular events leading to cocaine-induced behaviors.
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http://dx.doi.org/10.1016/s0169-328x(03)00319-x | DOI Listing |
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