类风湿关节炎滑膜组织人糖皮质激素诱导型肿瘤坏死因子受体表达的免疫组织化学研究

目的 观察研究人糖皮质激素诱导型肿瘤坏死因子受体(hGITR)在类风湿关节炎(RA)滑膜组织和软骨组织中的表达及其与滑膜炎性病变程度的相关性.方法 用免疫组织化学的方法对16例RA患者、9例骨关节炎(OA)患者及4例无关节病变的截肢患者滑膜组织和软骨组织中hGITR的表达进行描述分析,并对hGITR表达情况与RA患者滑膜炎性病变程度相关性进行分析.结果 hGITR在RA滑膜组织主要分布于血管翳周围,如血管内皮细胞和炎性细胞等,hGITR阳性细胞数约为69%.而该受体在RA患者软骨组织细胞中的表达率与对照组比较差异无统计学意义.OA滑膜组织和软骨组织细胞中hGITR也呈现不同程度的阳性表达,但与RA比较阳性程度较弱,阳性细胞数量较少;对hGITR表达与RA滑膜炎性程度的相关性分析发现,hGITR与RA滑膜炎性程度呈正相关(r=0.895,P<0.01).结论 hGITR在RA滑膜组织炎性细胞及血管内皮细胞上的异常表达可能是其参与RA血管翳的形成及滑膜组织的侵袭等病理过程导致RA患者滑膜损伤的一个重要机制.

Expression of human glucocorticoid-induced tumor necrosis factor receptor in the synovial of patients with rheumatoid arthritis

Objective To investigate the expression of human glucocorticoid-induced tumor necrosis factor receptor(hGITR)in synovial and cartilage tissue of patients with rheumatoid arthritis(RA),and analyze their relationships with the severity of synovial inflammation in RA.Methods Expression of hGITR in synovial and cartilage biopsy material of 16 RA patients,9 osteoarthritis(OA)patients,4 contmIs were detected in situ by immunohistochemical technique and the results were analyze then.Results hGITR was strongly expressed in the vascular endothelial cells and inflammatory cells in RA and hGITR positive cells could be detected in approximately 69%of RA synovial cells.Significant differenee Was foand in hGITR expression between RA patients and control group(P<0.01).hGITR was less expressed in the cartilage than the synovial in RA.No significant difference was found in expression in the cartilage tissue expression between RA patients and the control group.Significant difference Was found in hGITR expression between synovial and cartilage in RA.Furthermore.the hGITR positive cells in synovial tissues were also found to correlate significandy with the severity of synovial inflammation in RA patients(r=0.895,P<0.01).Conclusion These results suggest that the abnormal expression of hGITR in the synovial my bean important mechanism leading to the synovial destruction found in RA.