单核细胞趋化蛋白在强直性脊性炎患者中的表达与意义

Expression and significance of monocyte chemotactic protein in the pathogenesis of ankylosing spondylitis

目的旨在通过检测强直性脊性炎(AS)病人的外周血单个核细胞(PBMC)、关节滑液单个核细胞(SFMC)和滑膜细胞中趋化因子单核细胞趋化蛋白(MCP)基因表达水平,了解它们在AS中的变化及其在关节炎发病机制中的作用和意义。方法选取健康志愿者和AS病人的PBMC基因表达谱,通过含1176基因的cDNA微阵列扫描结果得到,筛选出的差异表达基因再以反转录-聚合酶链反应(RT-PCR)方法验证AS病人PBMC、SFMC和AS患者滑膜中的表达水平。结果MCP-1在AS患者SFMC表达明显高于健康志愿者的PBMC和AS病人的PBMC。AS患者SFMC中的MCP-1水平与MCP-3水平呈正相关(r=0.76,P=0.003);MCP-1在AS患者的关节滑膜细胞的表达水平明显高于健康对照者的关节滑膜细胞(P=0.0035);脂多糖(LPS)刺激4 h后,AS患者和健康志愿者的外周血单核细胞的MCP-1的表达显著增高。结论MCP-1在AS病人SFMC和关节滑膜细胞中呈高表达,提示MCP-1可能在AS病人的炎症细胞向关节的归巢以及关节局部的炎症反应中起重要作用。

Objective Previous study had shown that signal transduction was changed when Hela cells were transfected with HLA-B27gene.An increase of monocyte chemotactic protein-1(MCP-1)of Hela cells was observed.To determine the role of MCP in the pathogenesis of ankylosing spondylitis(AS),expression of MCP-1,2,3and4in peripheral blood mononuclear cells(PBMC),synovial fluid mononuclear cells(SFMC)and synovial tis-sues of AS patients were tested.Methods Gene expression profiles of PBMC from AS patients and healthy volun-teers were determined by cDNA microarray with1176target gene filter.The differentiated expressed gene MCP-1in PBMC,SFMC and synovial tissue of AS patients were confirmed by semi-quantitative RT-PCR.Results The gene expression profile of SFMC of AS patients was significantly different from those of PBMC from AS and PBMC from healthy volunteers.The MCP-1level was positively correlated with MCP-3(r=0.76,P=0.03).The expressions of MCP-1were higher in synovial tissues of AS than those of healthy volunteers(P=0.0035).MCP-1levels in monocytes of AS patients and control subjects were increased after LPS stimulation for4hours.Conclusions There is increased expression of MCP-1in SFMC and synovial tissue of AS patients.The results indicate that MCP-1may play a potential key role in the homing of cells migrating from blood to joint and in the pathogenesis of joint inflammation in AS patients.