强直性脊柱炎与 HLA-B27基因亚型的相关性研究

摘要

目的：探讨不同人类白细胞抗原B27（HLA‐B27）基因亚型与强直性脊柱炎（AS）的相关性。方法采集骨科、针灸风湿科门诊及住院患者静脉全血，应用基因分析法定性检测HLA‐B27，其中HLA‐B27阳性的AS确诊患者380例，并选取HLA‐B27阳性健康对照组50例，同时通过序列特异性引物PCR（PCR‐SSP）技术检测AS患者和健康对照组的 HLA‐B27基因亚型。结果380例A S患者中，检出 HLA‐B2704亚型217例（57．1％），HLA‐B2705亚型143例（37．6％），HLA‐B2707亚型11例（2．9％），HLA‐B2711亚型9例（2．4％）；50例 HLA‐B27阳性健康对照组中，检出 HLA‐B2706亚型23例（46．0％），HLA‐B2709亚型21例（42．0％），HLA‐B2704亚型4例（8．0％），HLA‐B2705亚型2例（4．0％），两组比较差异有统计学意义（ P＝0．002）。结论宝鸡地区AS患者HLA‐B27基因亚型以B2704和B2705为主，与宝鸡地区汉族人群AS的发病呈强相关；B2706及B2709为该地区保护亚型。%Objective To explore the correlation between different HLA‐B27 subgenotype and ankylosing spondylitis (AS ) . Methods The whole venous blood was collected from the outpatients and inpatients of the orthopedics ,acupuncture and rheuma‐tism departments and HLA‐B27 was qualitatively detected by using the gene analysis method .Among them ,380 cases of AS were HLA‐B27 positive ,and 50 cases of HLA‐B27 positive were selected as the healthy control group .Then the HLA‐B27 subgenotypes were detected by using the sequence specific primers PCR (PCR‐SSP) technology .Results Among 380 cases of AS ,217 cases (57 .1% ) of HLA‐AS B2704 subgenotype ,143 cases (37 .6% ) of HLA‐B2705 subgenotype ,11 cases (2 .9% ) of HLA‐B2707 sub‐genotype and 9 cases (2 .4% ) of HLA‐B2711 subgenotype were detected out ;among 50 cases of HLA‐B27 positive in the healthy control group ,23 cases (46 .0% ) of HLA‐B2706 subgenotype ,21 cases (42 .0% ) of HLA‐B2709 subgenotype ,4 cases (8 .0% ) of HLA B2704 subgenotype and 2 cases (4 .0% ) of HLA‐B2705 subgenotype were detected out ,the differences between the two groups were statistically significant (P=0 .002) .Conclusion The subgenotypes of HLA‐B27 among the AS patients in Baoji area are dominated by the genotype B2704 and B2705 ,which is strongly correlated with the occurrence of AS among Han population in Baoji area ;B2706 and B2709 are the protective subgenotypes in this area .