期刊
PHARMACOLOGICAL RESEARCH
卷 182, 期 -, 页码 -出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.phrs.2022.106347
关键词
Complex regional pain syndrome; Passive transfer-trauma mouse model; Unbiased transcriptome profiling of the dorsal root ganglia; Neuroinflammation
资金
- ELIXIR Hungary
- National Brain Research Program [2021-1.2.1-NKP-2021-00002, GINOP-2.3.4-15-2020-00010, GINOP-2.3.1-20-2020-00001, K-138046, PTE AOK_KA-2020-18, UNKP-20-4-II-PTE-465, 2019-1-HU01-KA203-061251]
- Eotvos Lorand Research Network
- National Research, Development and Innovation Fund of Hungary [TKP2021-EGA-16]
- Janos Bolyai Research Scholarship of the Hungarian Academy of Sciences [BO-00496/21/5]
- University of Pecs Medical School [KA-2022-11]
Complex Regional Pain Syndrome (CRPS) is a severe chronic pain disorder, and this study provides the first evidence for neuroinflammation and abnormal cytokine signaling in CRPS. The TNF and JAK-STAT signaling pathways were found to be involved, and drugs like etanercept and tofacitinib showed potential for drug repositioning in CRPS-related pain treatment.
Complex Regional Pain Syndrome (CRPS) represents severe chronic pain, hypersensitivity, and inflammation induced by sensory-immune-vascular interactions after a small injury. Since the therapy is unsatisfactory, there is a great need to identify novel drug targets. Unbiased transcriptomic analysis of the dorsal root ganglia (DRG) was performed in a passive transfer-trauma mouse model, and the predicted pathways were confirmed by pharmacological interventions. In the unilateral L3-5 DRGs 125 genes were differentially expressed in response to plantar incision and injecting IgG of CRPS patients. These are related to inflammatory and immune responses, cytokines, chemokines and neuropeptides. Pathway analysis revealed the involvement of Tumor Necrosis Factor (TNF) and Janus kinase (JAK-STAT) signaling. The relevance of these pathways was proven by abolished CRPS IgG-induced hyperalgesia and reduced microglia and astrocyte markers in pain-associated central nervous system regions after treatment with the soluble TNF alpha receptor etanercept or JAK inhibitor tofacitinib. These results provide the first evidence for CRPS-related neuroinflammation and abnormal cytokine signaling at the level of the primary sensory neurons in a translational mouse model and suggest that etanercept and tofacitinib might have drug repositioning potentials for CRPS-related pain.
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