Recruitment of leukocytes by chemokines and chemokine receptors to CNS plays a crucial role in the induction of inflammatory response in HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). In the present study, chemokine and chemokine receptors involved in trafficking of lymphocytes to the CNS were measured in HAM/TSP patients, HTLV-1 asymptomatic carriers (ACs), and healthy controls. The PVL, CCR6, and CXCR3 mRNA expression, and CXCL9 and CXCL10 protein levels were measured in all subjects. The PVL of HAM/TSP patients was higher than that of ACs (P = 0.02). CCR6 expression was higher in HAM/TSP patients and in ACs compared to the healthy controls (P = 0.005 and P = 0.04, respectively). A significant difference was observed in CCR6 expression when a combination of HAM/TSP patients and ACs were compared to the healthy individuals (P = 0.005). Furthermore, there was a significantly lower CXCR3 expression between HAM/TSP and control groups (P = 0.001), and between the ACs and healthy controls (P = 0.001). However, the increased CXCR3 expression in ACs compared to HAM/TSP patients was not significant. Furthermore, the CXCL10 protein levels in HAM/TSP patients was higher than in controls (P = 0.012), and CXCL9 protein levels was also higher in the HAM/TSP and ACs groups than in the controls (P = 0.001 and P = 0.004, respectively). In conclusion, it seems that decreased expression of CXCR3 and higher expression of CCR6 were associated with HTLV-1 infection, what indicate that these alterations may favor virus dissemination but not disease manifestation.

译文

趋化因子和趋化因子受体向中枢神经系统募集白细胞在HTLV-1-associated脊髓病/热带痉挛性截瘫 (HAM/TSP) 的炎症反应诱导中起关键作用。在本研究中,在HAM/TSP患者,HTLV-1无症状携带者 (ACs) 和健康对照中测量了参与向CNS转运淋巴细胞的趋化因子和趋化因子受体。在所有受试者中测量PVL,CCR6和CXCR3 mRNA表达以及CXCL9和CXCL10蛋白水平。HAM/TSP患者的PVL高于ACs (p   =   0.02)。与健康对照组相比,HAM/TSP患者和ACs患者的CCR6表达更高 (分别为p   =   0.005和p   =   0.04)。当将HAM/TSP患者和ACs的组合与健康个体进行比较时,观察到CCR6表达的显着差异 (p   =   0.005)。此外,在HAM/TSP和对照组之间 (p   =   0.001) 以及ACs和健康对照组之间 (p   =   0.001),CXCR3表达显着降低。然而,与HAM/TSP患者相比,ACs中CXCR3表达的增加并不显着。此外,HAM/TSP患者的CXCL10蛋白水平高于对照组 (p   =   0.012),HAM/TSP和ACs组的CXCL9蛋白水平也高于对照组 (p   =   0.001和p   =   0.004)。总之,似乎CXCR3的表达降低和CCR6的高表达与HTLV-1感染有关,这表明这些改变可能有利于病毒传播,而不是疾病表现。

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