HLA-B27基因表达量及亚型分析在 AS 疾病评估中的意义

摘要

Objective To investigate whether expression quantity of HLA-B27 and its subtypes associated with incidence of AS,the gene expression of HLA-B27 and its subtypes were detected in patients with AS.Methods 120 cases patients sus-pected with AS and 50 healthy subjects were enrolled in the study.Main demographic and clinical characteristics of the sub-jects were collected.Meanwhile total RNA was isolated from peripheral blood and real time RT-PCR was used to measure the quantitative expression of HLA-B27 gene.Besides RT-PCR,sequence-based typing (SBT)method was used to confirm the HLA-B27 subtype.All experimental data were analyzed by SPSS17.0 software and P values <0.05 were considered to be significant.Results Firstly,there were 55 subjects were finally diagnosed as AS patients among the 120 patients suspec-ted with AS.There were 53 subjects whose HLA-B27 was positive (96.36%)in 55 patients with AS.It showed that there was a correlation between BASDAI and expression quantity of HLA-B27 gene (r=0.845,P =0.000).Five subtypes were found and which were HLA-B27∶04 subtype (29/53,54.72%),HLA-B27:05 subtype (20/53,37.74%),HLA-B27 ∶02 subtype (2/53,3.77%),HLA-B27∶03 subtype (1/53,1.89%)and HLA-B27∶07 subtype (1/53,1.89%),respectively. Among the 50 healthy subjects,there were only one kind of subtype (2/50,4%),which was HLA-B27∶04.There were no statistical difference in the age (t=0.711,P =0.480),sex (χ2 =0.880,P =0.348),family history (χ2 =0.011,P =0.916) and treatment (χ2 =0.113,P =0.736)between the HLA-B27∶04 and HLA-B27∶05 subtypes.Conclusion HLA-B27∶04 and HLA-B27∶05 were primary subtypes in AS patients which HLA-B27 positive.There was a correlation between gene expression quantity of HLA-B27 and AS disease activity index.%目的：探讨人类白细胞抗原（human leukocyto antigens，HLA）B27（HLA-B27）基因表达量及其亚型在强直性脊柱炎疾病诊疗中的意义。方法收集120例疑似强直性脊柱炎患者和50例健康体检者的临床资料，对所收集患者的全血采用实时荧光定量聚合酶链反应检测 HLA-B27基因相对表达量，在此基础上通过基因测序确认 HLA-B27基因亚型。采用SPSS17.0软件对数据进行分析，P ＜0.05被认为差异有统计学意义。结果120例疑似强直性脊柱炎患者中，确诊55例，其中 HLA-B27阳性53例（96.36％），BASDAI 评分与 HLA-B27基因表达量具有相关性（r ＝0.845，P ＝0.000）。基因亚型分别为 HLA-B27∶04型29例（54.72％），HLA-B27∶05型20例（37.74％），HLA-B27∶02型2例（3.77％），HLA-B27∶03型1例（1.89％），HLA-B27∶07型1例（1.89％）。50例健康对照组中筛查 HLA-B27阳性2例（4％），均为 B27∶04亚型。对 HLA-B27∶04和 HLA-B27∶05两种亚型患者年龄（t＝0.711，P ＝0.480）、性别（χ2＝0.880，P ＝0.348）、家族史（χ2＝0.011，P ＝0.916）和治疗史（χ2＝0.113，P ＝0.736）比较差异无统计学意义。结论 HLA-B27阳性 AS 患者以HLA-B27∶04和 HLA-B27∶05为主。HLA-B27基因表达量与其疾病活动指数相关。