Journal
NEUROSCIENCE LETTERS
Volume 595, Issue -, Pages 30-34Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.neulet.2015.04.004
Keywords
Spinal cord injury; Neuropathic pain; Tumor necrosis factor-alpha; Toll-like receptor 4; Interleukin-6
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Funding
- National Natural Science Foundation of China [81472107, 81301530]
- Scientific Research Project of Education Department of Heilongjiang Province [12541531]
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Neuropathic pain (NP) is one of the most common complications after spinal cord injury (SCI), but no protein biomarkers has ever been introduced into clinical diagnosis. Previous studies implicated that toll-like receptor (TLR) 4 played a critical role in the development of NP in animal SCI models. Here, a total of 140 participants were recruited, 70 of them were SCI-NP subject and the rest 70 controls did not show neuropathic symptoms. TLR4 was upregulated significantly in SCI-NP patients compared with SCI-noNP subjects. Furthermore, we measured the concentrations of tumor necrosis factor-alpha (TNE-alpha) and interleukin-6 (IL-6), two TLR4 downstream pro-inflammatory cytokines, to assess their diagnostic values. Receiver operating characteristics (ROC) analysis revealed that TNF-alpha had great potential advantages to predict the progression of neuropathy, the risks of NP were strongly increased in SCI subjects with higher levels of TNF-alpha (odds ratio: 4.92; 95% confidence interval: 1.89-12.32). These results suggested neuro-immune activation contributed to the development of neuropathic disorder after SCI, and INF-alpha could be a potential sensitive diagnostic biomarker for chronic neuropathic pain in SCI patients. (C) 2015 Elsevier Ireland Ltd. All rights reserved.
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