Title : Sustained morphine-mediated pain sensitization and antinociceptive tolerance are blocked by intrathecal treatment with Raf-1-selective siRNA.

Pub. Date : 2010 Sep

PMID : 20718739






5 Functional Relationships(s)
Download
Sentence
Compound Name
Protein Name
Organism
1 BACKGROUND AND PURPOSE: Long-term morphine treatment enhances pain neurotransmitter [such as calcitonin gene-related peptide (CGRP)] levels in the spinal cord. Morphine calcitonin-related polypeptide alpha Rattus norvegicus
2 BACKGROUND AND PURPOSE: Long-term morphine treatment enhances pain neurotransmitter [such as calcitonin gene-related peptide (CGRP)] levels in the spinal cord. Morphine calcitonin-related polypeptide alpha Rattus norvegicus
3 It has been suggested previously that increased spinal CGRP may contribute to sustained morphine-mediated paradoxical pain sensitization and antinociceptive tolerance. Morphine calcitonin-related polypeptide alpha Rattus norvegicus
4 Previous in vitro studies from our group indicated that Raf-1 kinase-mediated adenylyl cyclase superactivation played a crucial role in sustained morphine-mediated augmentation of basal and evoked CGRP release from cultured primary sensory neurons. Morphine calcitonin-related polypeptide alpha Rattus norvegicus
5 KEY RESULTS: Selective knockdown of spinal Raf-1 protein levels by i.th Raf-1-selective siRNA pretreatment significantly attenuated sustained morphine-mediated up-regulation of CGRP immunoreactivity in the spinal cord of rats and prevented the development of thermal hyperalgesia, mechanical allodynia and antinociceptive tolerance. Morphine calcitonin-related polypeptide alpha Rattus norvegicus