程序化死亡基因5(PDCD5)在骨关节炎软骨中的表达及意义  

Characterization of programmed cell death 5 (PDCD5) gene in human cartilage and its possible significance

作　　者：程爱新[1] 王莺[2] 马大龙[2] 周昊嵬[1] 娄思权[1] 

机构地区：[1]北京大学第三医院骨科,北京100083 [2]北京大学人类疾病基因研究中心,北京100083

出　　处：《北京大学学报（医学版）》2003年第5期481-484,共4页Journal of Peking University:Health Sciences

摘　　要：目的 :研究程序化死亡基因 5 (PDCD5 )在正常及骨关节炎关节软骨中的表达规律 ,探讨PDCD5在骨关节炎发病中的作用。方法 :取 2 0例骨关节炎及 10例股骨颈骨折行关节置换术时切除的关节软骨 ,分离软骨细胞 ,留取组织块制作石蜡切片。分别用流式细胞术、直接免疫荧光、激光共聚焦显微镜及RT -PCR检测PDCD5在正常及骨关节炎软骨细胞内的表达水平及部位 ,免疫组织化学检测PDCD5在关节软骨内的表达特征。结果 :在骨关节炎软骨细胞中PDCD5表达上调 ,以细胞核内增强为主 ;在骨关节炎的组织切片中PDCD5表达增强 ,阳性细胞主要分布在表层及深层 ,而在股骨颈骨折中PDCD5阳性细胞主要分布在表层及中层。结论 :PDCD5可能参与了骨关节炎软骨细胞的凋亡过程 。Objective: To characterize the expression of programmed cell death 5 (PDCD5) in normal and osteoarthritic human cartilage. Methods: Articular cartilage specimens were obtained from 20 patients with osteoarthritis and 10 with femoral neck (normal cartilage) at the time of arthroplasty. Expression of PDCD5 was detected by flow cytometry, immunofluorescence, RT-PCR and immunohistochemical analysis. Results: PDCD5 expression in osteoarthritis cartilage was significantly higher than in normal cartilage especially in the nucleus. PDCD5 positive chondrocytes were mainly observed in the superficial and deep zone of osteoarthritis tissue sections,and in contrast, in the superficial and middle regions of normal controls. Conclusion: Since apoptotic chondrocyte death occurs more frequently in osteoarthritis compared to normal cartilage and PDCD5 is an apoptosis related protein, the different expression patterns of PDCD5 in osteoarthritis and normal cartilage suggest that it might be involved in the pathogenesis of osteoarthritis.

关 键 词：程序化死亡基因5 PDCD5 骨关节炎 软骨 表达 

分 类 号：R684.3[医药卫生—骨科学]