抗促红细胞生成素受体抗体与系统性红斑狼疮伴贫血的相关性研究

目的 分析抗促红细胞生成素受体(EPOR)抗体在系统性红斑狼疮(SLE)中的作用,并探讨其与SLE伴贫血及病情的相关性.方法 应用酶联免疫吸附试验(ELISA)检测124例SLE患者中的抗EPOR抗体,并与7例自身免疫溶血性贫血,19例缺铁性贫血患者及45名健康人对照.同时分析SLE患者临床特点及病情活动度.所有计数资料采用x2检验或Fisher精确检验,计量资料采用t检验.结果 抗EPOR抗体在SLE组中发生率为20.2%,明显高于健康对照组的2.2%(P=0.004),而在自身免疫溶血性贫血及缺铁性贫血患者未检测到抗EPOR抗体.51例伴发贫血的SLE患者中,17例(33%)抗EPOR抗体阳性,而73例无贫血患者中仅有8例(11%)抗EPOR抗体阳性,差异有统计学意义(P=002);进一步分析发现抗EPOR抗体阳性患者其贫血程度重,而且呈现小细胞性贫血(P=0.005).对照抗EPOR抗体阳性与阴性患者的临床资料显示,皮疹(P=0.014)、补体C3下降(P=0.01)、抗dsDNA抗体阳性(P=0.000)及疾病活动积分高的SLE患者更易产生抗EPOR抗体.结论 抗EPOR抗体可能在SLE发生贫血的过程中起重要作用.ELISA测定抗EPOR抗体具有良好的稳定性和特异性,在伴发贫血的SLE患者中检测该抗体具有一定的临床价值.

Abstract：

Objective To investigate the presentationand significance of circulating autoantibodies to erythropoietin receptor (EPOR) in sera from patients with systemic lupus erythematosus (SLE). Methods One hundred and twenty-four consecutive patients with SLE, seven with autoimmune hemolytic anemia (AIHA), 19 patients with iron deficiency anemia (IDA) and 45 normal individuals were involved in this study. In all patients with SLE, the disease activity was evaluated using the European consensus Lupus Activity Measurement scale. Antibodies to EPOR were detected by enzyme-linked immunosorbent assay (ELISA). All data were tested with Chi-squared or Student's t tests by SPSS software. Results A higher frequency of antibodies to EPOR were detected in SLE patients than healthy controls (20.2% vs 2.2%, P=0.004), however, they could not be detected in AIHA and IDA patients. Moreover, anti-EPOR antibodies were detected in 17 (33.3%) of 51 SLE patients with anemia, compared with that in 8 (11.0%, P=0.002) of 73 patients without anemia. Furthermore, patients with antibodies to EPOR had more severe anemia and often presented as microcytic anemia (P =0.005) than those without anti-EPOR antibodies. Finally, anti-EPOR antibodies seemed to be more likely to occur in patients with skin rash (P=0.014), low levels of C3 component of complement (P=0.01), positive anti-dsDNA antibodies (P=0.000) and higher disease activity scores (P= 0.024). Conclusion The higher incidence of antibodies to EPOR in SLE patients with anemia suggest that anti-EPOR antibodies might play a vital role in the development of anemia in SLE patients. Thus, detecting anti-EPOR antibodies in SLE patients with anemia may be helpful.

Anti-EPO receptor antibodies in systemic lupus erythematosus with anemia

Objective To investigate the presentationand significance of circulating autoantibodies to erythropoietin receptor (EPOR) in sera from patients with systemic lupus erythematosus (SLE). Methods One hundred and twenty-four consecutive patients with SLE, seven with autoimmune hemolytic anemia (AIHA), 19 patients with iron deficiency anemia (IDA) and 45 normal individuals were involved in this study. In all patients with SLE, the disease activity was evaluated using the European consensus Lupus Activity Measurement scale. Antibodies to EPOR were detected by enzyme-linked immunosorbent assay (ELISA). All data were tested with Chi-squared or Student's t tests by SPSS software. Results A higher frequency of antibodies to EPOR were detected in SLE patients than healthy controls (20.2% vs 2.2%, P=0.004), however, they could not be detected in AIHA and IDA patients. Moreover, anti-EPOR antibodies were detected in 17 (33.3%) of 51 SLE patients with anemia, compared with that in 8 (11.0%, P=0.002) of 73 patients without anemia. Furthermore, patients with antibodies to EPOR had more severe anemia and often presented as microcytic anemia (P =0.005) than those without anti-EPOR antibodies. Finally, anti-EPOR antibodies seemed to be more likely to occur in patients with skin rash (P=0.014), low levels of C3 component of complement (P=0.01), positive anti-dsDNA antibodies (P=0.000) and higher disease activity scores (P= 0.024). Conclusion The higher incidence of antibodies to EPOR in SLE patients with anemia suggest that anti-EPOR antibodies might play a vital role in the development of anemia in SLE patients. Thus, detecting anti-EPOR antibodies in SLE patients with anemia may be helpful.