Abstract
We had previously demonstrated that c-fos antisense oligodeoxynucleotides dose-dependently suppressed formalin-induced c-Fos protein and behavioral hyperalgesia. To test whether de novo protein synthesis is required for the development of persistent pain after peripheral inflammation, we observed formalin-induced spinal c-Fos protein and nociceptive behaviors following pretreatment with cycloheximide, a protein synthesis inhibitor. Cycloheximide dose-dependently inhibited formalin-induced spinal c-Fos protein and tonic nociceptive responses. The possible non-specific effects other than protein synthesis inhibition on nociceptive behavior were carefully discussed and excluded. These results provide further support to the hypothesis that de novo protein synthesis is essential for the development of behavioral hyperalgesia.
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