Castelli Mara, Amodeo Giada, Negri Lucia, Lattanzi Roberta, Maftei Daniela, Gotti Cecilia, Pistillo Francesco, Onnis Valentina, Congu Cenzo, Panerai Alberto E, Sacerdote Paola, Franchi Silvia
Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milano, Italy.
Department of Physiology and Pharmacology 'Vittorio Erspamer', University of Rome, Roma, Italy.
PLoS One. 2016 Jan 5;11(1):e0146259. doi: 10.1371/journal.pone.0146259. eCollection 2016.
Neuropathic pain is a severe diabetes complication and its treatment is not satisfactory. It is associated with neuroinflammation-related events that participate in pain generation and chronicization. Prokineticins are a new family of chemokines that has emerged as critical players in immune system, inflammation and pain. We investigated the role of prokineticins and their receptors as modulators of neuropathic pain and inflammatory responses in experimental diabetes. In streptozotocin-induced-diabetes in mice, the time course expression of prokineticin and its receptors was evaluated in spinal cord and sciatic nerves, and correlated with mechanical allodynia. Spinal cord and sciatic nerve pro- and anti-inflammatory cytokines were measured as protein and mRNA, and spinal cord GluR subunits expression studied. The effect of preventive and therapeutic treatment with the prokineticin receptor antagonist PC1 on behavioural and biochemical parameters was evaluated. Peripheral immune activation was assessed measuring macrophage and T-helper cytokine production. An up-regulation of the Prokineticin system was present in spinal cord and nerves of diabetic mice, and correlated with allodynia. Therapeutic PC1 reversed allodynia while preventive treatment blocked its development. PC1 normalized prokineticin levels and prevented the up-regulation of GluN2B subunits in the spinal cord. The antagonist restored the pro-/anti-inflammatory cytokine balance altered in spinal cord and nerves and also reduced peripheral immune system activation in diabetic mice, decreasing macrophage proinflammatory cytokines and the T-helper 1 phenotype. The prokineticin system contributes to altered sensitivity in diabetic neuropathy and its inhibition blocked both allodynia and inflammatory events underlying disease.
神经性疼痛是一种严重的糖尿病并发症,其治疗效果并不理想。它与参与疼痛产生和慢性化的神经炎症相关事件有关。促动力蛋白是一类新的趋化因子,已成为免疫系统、炎症和疼痛中的关键参与者。我们研究了促动力蛋白及其受体作为实验性糖尿病中神经性疼痛和炎症反应调节因子的作用。在链脲佐菌素诱导的小鼠糖尿病模型中,评估了促动力蛋白及其受体在脊髓和坐骨神经中的时间进程表达,并将其与机械性异常性疼痛相关联。测量了脊髓和坐骨神经中促炎和抗炎细胞因子的蛋白质和mRNA水平,并研究了脊髓中谷氨酸受体亚基的表达。评估了促动力蛋白受体拮抗剂PC1的预防性和治疗性治疗对行为和生化参数的影响。通过测量巨噬细胞和辅助性T细胞细胞因子的产生来评估外周免疫激活。糖尿病小鼠的脊髓和神经中促动力蛋白系统上调,并与异常性疼痛相关。治疗性使用PC1可逆转异常性疼痛,而预防性治疗可阻止其发展。PC1使促动力蛋白水平正常化,并防止脊髓中GluN2B亚基的上调。拮抗剂恢复了脊髓和神经中改变的促炎/抗炎细胞因子平衡,还降低了糖尿病小鼠外周免疫系统的激活,减少了巨噬细胞促炎细胞因子和辅助性T细胞1表型。促动力蛋白系统导致糖尿病性神经病变中敏感性改变,其抑制可阻断疾病潜在的异常性疼痛和炎症事件。