Behavioral sensitization to amphetamine is not accompanied by a decrease in the number of c-Fos containing cells in the striatum |
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Authors: | SM Turgeon JE Blum EA Auerbach |
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Affiliation: | Department of Psychology and Neuroscience Program, Amherst College, MA 01002, USA. smturgeon@amherst.edu |
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Abstract: | The expression of c-Fos-like immunoreactivity (FLI) and chronic Fos-related antigen-like immunoreactivity (FRALI) accompanying behavioral sensitization to amphetamine was assessed in male rat striatum. Animals were treated for four days with amphetamine (A; 5 mg/kg) or vehicle (V) and challenged with A or V on the fifth day. The number of FLI-positive cells in the striatum was enhanced in V-A and A-A groups as compared to control (V-V), while the number of FRALI-positive cells in the striatum was enhanced in the A-V and A-A groups as compared to control. These results suggest that the absence of a decrease in the number of striatal FLI-positive cells accompanying chronic amphetamine treatment is not due to antibody cross-reactivity with chronic FRAs, and that behavioral sensitization to amphetamine is not accompanied by a change in the number of striatal cells expressing c-Fos. |
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