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• W2012350074 abstract "A role of neuropeptides in neuropathic pain development has been implicated; however, the neuroimmune interactions that are involved in the underlying mechanisms may be more important than previously thought. To examine a potential role of relations between glia cells and neuropeptides in neuropathic pain, we performed competitive reverse-transcription polymerase chain reaction (RT-PCR) from the dorsal lumbar spinal cord and the dorsal root ganglion (DRG) after chronic constriction injury (CCI) in the rat sciatic nerve. The RT-PCR results indicated that complement component 1, q subcomponent (C1q) mRNA expression was higher than glial fibrillary acidic protein (GFAP) in the spinal cord 3 and 7 days post-CCI, suggesting that spinal microglia and perivascular macrophages are more activated than astrocytes. In parallel, we observed a strong upregulation of prodynorphin mRNA in the spinal cord after CCI, with no changes in the expression of proenkephalin or pronociceptin. Conversely, the expression of GFAP mRNA in the DRG was higher than C1q, which suggests that the satellite cells are activated shortly after injury, followed by the macrophages and polymorphonuclear leukocytes infiltrating the DRG. In the DRG, we also observed a very strong upregulation of prodynorphin (1387%) as well as pronociceptin (122%) and a downregulation of proenkephalin (47%) mRNAs. Interestingly, preemptive and repeated i.p. injection of minocycline reversed the activation of microglia/macrophages in the spinal cord and the trafficking of peripheral immune cells into the DRG, and markedly diminished the upregulation of prodynorphin and pronociceptin in the DRG. We thus provide novel findings that inhibition of C1q-positive cells by minocycline can diminish injury-induced neuropeptide changes in the DRG. This suggests that immune cells-derived pronociceptive factors may influence opioid peptide expression. Therefore, the injury-induced activation of microglia and leukocytes and the subsequent activation of neuropeptides involved in nociception processes are potential targets for the attenuation of neuropathic pain." @default.
• W2012350074 created "2016-06-24" @default.
• W2012350074 creator A5003101597 @default.
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• W2012350074 date "2010-02-01" @default.
• W2012350074 modified "2023-09-26" @default.
• W2012350074 title "Minocycline reduces the injury-induced expression of prodynorphin and pronociceptin in the dorsal root ganglion in a rat model of neuropathic pain" @default.
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• W2012350074 doi "https://doi.org/10.1016/j.neuroscience.2009.11.064" @default.
• W2012350074 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19961904" @default.
• W2012350074 hasPublicationYear "2010" @default.
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