目的：检测白塞氏病(BD)患者和正常人群血浆中微小核糖核酸(microRNA，miRNA)的差异表达谱，探讨miRNA在BD发病中的作用，寻找与BD相关的血浆生物标记物。

方法：收集15例活动期BD患者和15例正常人的抗凝静脉血，离心获得血浆，提取总RNA，经miRNA标记、miRNA阵列杂交、miRNA阵列扫描和分析获得BD患者异常表达的miRNA谱。通过miRTarBase(靶基因数据库)检索差异性表达的miRNA已经过验证的靶基因，并选取与免疫学相关的差异性表达的miRNA进行Real time-PCR验证。

结果：活动期BD患者血浆中hsa-miR-34c-5p、hsa-miR-144-3p、hsa-miR-483-3p较正常人表达上调，hsa-miR-301a-3p、hsa-miR-224-5p、hsa-miR-454-3p、hsa-miR-17-5p、hsa-miR-199a-5p较正常人表达下调。

结论：miRNA的差异性在BD的发生发展过程发挥重要作用，异常表达的miRNA可能通过Notch1和SMAD4信号通路促进BD发病。

METHODS: Blood samples from 15 cases of BD patients and 15 cases of normal control were collected to extracted total RNA in plasma. The miRNAs was labeled, miRNAs array hybridization was performed and then array-scanned and analyzed. We searched verified target genes and selected meaningful miRNAs to underwent real time PCR.

RESULTS: In comparison with the healthy controls, there were 8 anomalous miRNAs, in which 3 miRNAs(hsa-miR-34c-5p, hsa-miR-144-3p, hsa-miR-483-3p)were up regulated and 5 miRNAs(hsa-miR-301a-3p, hsa-miR-224-5p, hsa-miR-454-3p, hsa-miR-17-5p, hsa-miR-199a-5p)were down regulated(all P<0.05).

CONCLUSION: The present examination suggests that aberrant levels of miRNAs could contribute to the pathogenesis of BD. Deviant expression of miRNAs may be involved in the activation of Notch1 and SMAD4 pathway in BD, which could offer a novel therapeutic approach for BD.