Beh(c)et病患者结节红斑组织中CD40/CD40L共刺激分子的表达

目的：探讨Behcet病患者结节红斑中CD40/CD40L分子的表达及意义。方法：采用免疫组化方法对5例Behcet病活动期患者腿或臂部结节红斑中CD4,CD8,CD19,CD68,HLA-DR,CD40和CD40L分子表达的情况进行了检测,并用双重染色方法探讨了细胞来源。结果：Behcet病结节红斑中表皮约90%的细胞表达CD40,但无CD40L表达。真皮和皮下表达CD4,CD8,CD19,CD68,HLA-DR,CD1a,CD40L和CD40的细胞均显著增多。双染结果显示,45%的CD4^＋T细胞表达CD40L分子。100?68^＋细胞表达CD40分子。59.2%的HLA-DR^＋细胞表达CD40分子。结论：CD40L分子主要表达于CD4^＋T细胞,CD40分子主要表达于单核巨噬细胞、抗原提呈细胞和角朊细胞。CD40/CD40L通路可诱导巨噬细胞和T淋巴细胞的功能和活性,对Behcet病患者结节红斑的发生、炎症的持续和扩大起重要作用。

An increased expression of CD40/CD40L costimulatory molecules in erythema nodosum of patients with Beh(c)et's disease

· AIM: To investigate the expression and the possible implication of CD40/CD40L costimulatory molecules in erythema nodosum of patients with Beh(c)et's disease.· METHODS: Sampling was done from erythema nodosum of 5 patients with Beh(c)et's disease and normal skin of 2 healthy individuals. Immunohistochemical staining was performed to examine the expression of CD4, CD8, CD19, CD68, HLA-DR,CD40 and CD40L molecules in the obtained tissues.· RESULTS: Approximately 90% of epidermic cells in erythema nodosum expressed CD40 molecule. In the dermis and subcutaneous tissue, a significantly increased number of CD4+Tcells, CD8+Tcells, CD19+cells, CD68+cells, HLA-DR+cells,CD40L+cells, and CD40+cells were observed in the erythema nodosum as compared with that in normal skin. Double staining showed that CD40L molecules were expressed on 45% of CD4+T cells. CD40 molecules were expressed on 100% CD68+ cells and 59.2% of HLA-DR+cells respectively.· CONCLUSION: A number of CD40/CD40L costimulatory molecules are upreguiated in the erythema nodosum of patients with Behcet's disease.