Inflammatory and immune responses following nerve injury have been shown to play an important role in neuropathic pain. Lipoxins are endogenous lipoxygenase-derived eicosanoids performing protective roles in a range of pathophysiologic processes. Here, we examined the effects of intrathecal lipoxinA4 (LXA4) on NF-κB activation and pro-inflammatory cytokine (TNF-α, IL-1β and IL-6) expression in dorsal root ganglia (DRG) following chronic compression of DRG (CCD), a model of neuropathic pain. Daily intrathecal injection of vehicle or LXA4 (10 ng or 100 ng) was performed for three successive days post-CCD. CCD induced both mechanical allodynia and thermal hyperalgesia, and increased the expression of TNF-α, IL-1β, IL-6 and NF-κB. Intrathecal injection of LXA4 prevented the development of neuropathic pain and inhibited NF-κB activation and pro-inflammatory cytokine upregulation in a dose-dependent manner. In this study, we have shown the strong protective effect of intrathecal LXA4 on the development of nociceptive behaviors induced by CCD and that these effects might be associated with its anti-inflammatory and pro-resolution properties.

译文

神经损伤后的炎症和免疫反应已被证明在神经性疼痛中起重要作用。脂氧素是内源性脂氧合酶衍生的类花生酸,在一系列病理生理过程中发挥保护作用。在这里,我们研究了鞘内注射lipoxinA4 (LXA4) 对慢性压迫DRG (CCD) 后背根神经节 (DRG) 中NF-κ b活化和促炎性细胞因子 (TNF-α,IL-1β 和IL-6) 表达的影响。神经病理性疼痛。在CCD后连续三天进行每天鞘内注射赋形剂或LXA4 (10 ng ng或100  ng)。CCD引起机械痛觉异常和热痛觉过敏,并增加TNF-α,IL-1β,IL-6和NF-κ b的表达。鞘内注射LXA4可防止神经性疼痛的发展,并以剂量依赖性方式抑制NF-κ b活化和促炎性细胞因子上调。在这项研究中,我们已经证明鞘内LXA4对CCD诱导的伤害感受行为的发展具有很强的保护作用,并且这些作用可能与其抗炎和促分辨特性有关。

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