趋化因子 CCL2 及其受体 CCR2 在背根神经节中有助于奥沙利铂诱导的机械性超敏反应。
Chemokine CCL2 and its receptor CCR2 in the dorsal root ganglion contribute to oxaliplatin-induced mechanical hypersensitivity.
机构信息
Department of Anesthesiology and Pain Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
Department of Anesthesiology, Chang Gung Memorial Hospital, College of Medicine, Chang Gung University, Taoyuan, Taiwan.
出版信息
Pain. 2018 Jul;159(7):1308-1316. doi: 10.1097/j.pain.0000000000001212.
Activation of innate immune mechanisms within the dorsal root ganglion and spinal dorsal horn has been shown to play a key role in the development of neuropathic pain including paclitaxel-related chemotherapy-induced peripheral neuropathy (CIPN). Here, we tested whether similar mechanisms are generalizable to oxaliplatin-induced CIPN. After a single intraperitoneal injection of 3 mg/kg oxaliplatin, mechanical withdrawal threshold and the expression of C-C chemokine ligand 2 (CCL2) and its receptor, CCR2, in the dorsal root ganglion were measured by behavioral testing and immunohistochemical staining, respectively. Mechanical responsiveness increased from the first day after oxaliplatin injection and persisted until day 15, the last day of this experiment. Immunohistochemical showed that the expression of CCL2/CCR2 started to increase by 4 hours after oxaliplatin treatment, was significantly increased at day 4, and then both signals became normalized by day 15. Cotreatment with intrathecal anti-CCL2 antibodies prevented the development of oxaliplatin-induced mechanical hyperresponsiveness, and transiently reversed established hyperalgesia when given 1 week after chemotherapy. This is the first study to demonstrate CCL2/CCR2 signaling in a model of oxaliplatin-related CIPN; and it further shows that blocking of this signal can attenuate the development of oxaliplatin-induced mechanical hyperalgesia. Activation of innate immune mechanisms may therefore be a generalized basis for CIPN irrespective of the specific class of agent.
已证实,背根神经节和脊髓背角固有免疫机制的激活在神经病理性疼痛的发展中起着关键作用,包括紫杉醇相关的化疗诱导性周围神经病(CIPN)。在这里,我们测试了类似的机制是否可推广到奥沙利铂诱导的 CIPN。在单次腹腔注射 3mg/kg 奥沙利铂后,通过行为测试和免疫组织化学染色分别测量机械退缩阈值和背根神经节中 C-C 趋化因子配体 2(CCL2)及其受体 CCR2 的表达。机械反应性从奥沙利铂注射后的第一天开始增加,并持续到实验的最后一天第 15 天。免疫组织化学显示,奥沙利铂处理后 4 小时 CCL2/CCR2 的表达开始增加,在第 4 天显著增加,然后两种信号在第 15 天恢复正常。鞘内给予抗 CCL2 抗体可预防奥沙利铂诱导的机械性超敏反应的发展,并在化疗后 1 周给予时可短暂逆转已建立的痛觉过敏。这是首次在奥沙利铂相关 CIPN 模型中证明 CCL2/CCR2 信号的研究;它进一步表明,阻断该信号可以减轻奥沙利铂诱导的机械性痛觉过敏的发展。固有免疫机制的激活因此可能是 CIPN 的普遍基础,而与特定的药物类别无关。