Dose-related antiallodynic effects of cyclic AMP response element-binding protein-antisense oligonucleotide in the spared nerve injury model of neuropathic pain

Neuroscience
Y-Y WangY Q Li

Abstract

A transcription factor known as cyclic AMP response element-binding protein has been shown to be involved in the central sensitization in neuropathic pain and inflammation pain. The present study examined the roles of cyclic AMP response element-binding protein and of the phosphorylated cyclic AMP response element-binding protein in the maintenance of mechanical and cold allodynia induced by a neuropathic pain model, "spared nerve injury," in rats. First, the results of immunohistochemical study showed that phosphorylated cyclic AMP response element-binding protein, but not cyclic AMP response element-binding protein, increased bilaterally in the spinal dorsal horn 14 days following spared nerve injury, indicating a possible contribution of phosphorylated cyclic AMP response element-binding protein in spared nerve injury. Second, chronic intrathecal application of cyclic AMP response element-binding protein antisense oligodeoxynucleotide with three doses (10 microg/day, 20 microg/day and 40 microg/day) for 5 days demonstrated that the higher doses (20 and 40 microg) significantly attenuated both mechanical (bilaterally) and cold (ipsilaterally) allodynia, compared with sense oligodeoxynucleotide and the lower dose (10 microg). ...Continue Reading

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