Common transcriptional signatures of neuropathic pain

被引:24
|
作者
Pokhilko, Alexandra [1 ]
Nash, Anthony [1 ]
Cader, M. Zameel [1 ]
机构
[1] Univ Oxford, Weatherall Inst Mol Med, Nuffield Dept Clin Neurosci, Translat Mol Neurosci Grp, Oxford OX3 9DS, England
关键词
Neuropathic pain; RNA-Seq; Animal models of pain; Nerve injury pain; Bioinformatics; DORSAL-ROOT GANGLION; EXPRESSION; RECEPTOR; BEHAVIOR; CELLS;
D O I
10.1097/j.pain.0000000000001847
中图分类号
R614 [麻醉学];
学科分类号
100217 ;
摘要
Abstarct The dorsal root ganglia (DRG) are key structures in nociception and chronic pain disorders. Several gene expression studies of DRG in preclinical pain models have been performed, but it is unclear if consistent gene changes are identifiable. We, therefore, compared several recent RNA-Seq data sets on the whole DRG in rodent models of nerve injury. Contrary to previous findings, we show hundreds of common differentially expressed genes and high positive correlation between studies, despite model and species differences. We also find, in contrast to previous studies, that 60% of the common rodent gene response after injury is likely to occur in nociceptors of the DRG. Substantial expression changes are observed at a 1-week time-point, with smaller changes in the same genes at a later 3- to 4-week time-point. However, a subset of genes shows a similar magnitude of changes at both early and late time-points, suggesting their potential involvement in the maintenance of chronic pain. These genes are centred around suppression of endogenous opioid signalling. Reversal of this suppression could allow endogenous and exogenous opioids to exert their analgesic functions and may be an important strategy for treating chronic pain disorders. Currently used drugs, such as amitriptyline and duloxetine, do not seem to appropriately modulate many of the critical pain genes and indeed may transcriptionally suppress endogenous opioid signalling further.
引用
收藏
页码:1542 / 1554
页数:13
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