银屑病患者红细胞CD35和红细胞趋化因子受体的测定

目的研究银屑病患者红细胞CD35及红细胞趋化因子受体(ECKR),探讨红细胞天然免疫功能状况及其在银屑病发病机制中的作用。方法测定新鲜血红细胞对肿瘤细胞的快速天然免疫反应;用流式细胞仪定量测定红细胞CD35;用ELISA法检测白介素8含量,反映红细胞上ECKR的结合活性。结果银屑病患者肿瘤红细胞花环率和红细胞CD35定量均明显高于对照组(P<0.05),ECKR结合活性比正常人明显降低(P<0.05),红细胞CD35定量及ECKR结合活性与PASI评分呈显著正相关(r =0.93,P<0.001,r =0.49,P<0.005)。结论银屑病患者红细胞天然免疫功能存在亢进和紊乱,红细胞CD35分子数量及其活性的增加是银屑病天然免疫反应能力亢进的基础;红细胞CD35分子定量及ECKR结合活性的测定可作为判断银屑病病情的客观指标;红细胞参与了细胞因子的调控并在银屑病的发病过程中可能起一定作用。

Detection of CD35 on Erythrocytes and Erythrocyte Chemokine Recepter (ECKR) in Patients with Psoriasis

Objective To study CD35on erythrocytes and erythrocyte chemokine recepter(ECKR)in patients with psoriasis in order to explore red blood cell(RBC)innate immune function and its possible role in the pathogenesis of psoriasis.Methods The rapid natural immune reaction on cancer cells was measured with RBCs isolated from fresh blood.Expression of CD35on erythrocytes was detected by flow cy-tometry.The level of IL-8,which was bound to isolated erythrocytes,was measured by enzyme linked im-munosorbent assay(ELISA)in the supernatant after centrifugation,which represented ECKR binding activity.Results Rosette formation rates of RBC adhering to cancer cells and expression of CD35on RBCs were significantly higher in psoriatic patients than those in control group(P<0.05).ECKR binding activity was significantly decreased compared with control group(P<0.05).CD35expression and ECKR binding activ-ity were positively correlated to PASI index(r =0.926,P<0.001,and r =0.486,P< 0.005respectively).Conclusions The high CD35expression results in the change of RBC innate immune function which is found to be in a status of hyperfunction and disorder in patients with psoriasis.Detection of RBC innate im-mune molecular CD35in patients with psoriasis may be served as an objective indicator in evaluating clini-cal condition of psoriasis.Erythrocytes may participate in the regulation of chemokines and play a role in the pathogenesis of the psoriasis.