J Rheumatol:类风湿性关节炎中抗体与含高瓜氨酸或瓜氨酸肽的相关性

2017-12-11 xiangting MedSci原创

RA患者常有CitJED和HomoCitJED抗体,但在SLE或PsA中未发现这些抗体,提示这些抗体是RA特异性的。

针对瓜氨酸蛋白/肽(ACPA)和高瓜氨酸/氨基甲酰化蛋白/肽(AHCPA)的抗体与类风湿性关节炎(RA)有关。ACPA和AHCPA之间的关系尚不清楚。这项研究使用含有瓜氨酸和高瓜氨酸的合成肽,CitJED和HomoCitJED分别检测了这些抗体的表达和交叉反应性,上述合成肽在相同的肽骨架上具有相同数量的瓜氨酸或高瓜氨酸残基。

通过ELISA法筛查健康人51例,RA患者137例,系统性红斑狼疮SLE 37例和银屑病关节炎37例血浆的IgG 抗CitJED和抗HomoCitJED抗体。用不同浓度的CitJED和HomoCitJED抑制来检测这些抗体的交叉反应性。

在137例RA患者中,69例(50%)和78例(57%)分别检测到CitJED和HomoCitJED抗体。抗CitJED和抗HomoCitJED抗体77%一致,它们的水平呈强相关[[Spearman相关系数(r s)= 0.6676]。来自25/27例(93%)RA患者的血清被CitJED和HomoCitJED所抑制,对同源肽具有相等或更高的亲和力。

RA患者常有CitJED和HomoCitJED抗体,但在SLE或PsA中未发现这些抗体,提示这些抗体是RA特异性的。抗HomoCitJED和抗CitJED抗体之间的交叉反应性表明ACPA和AHCPA来源于相同的B细胞群,并且都可能导致RA的发病。

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    2017-12-13 lmm397
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    2017-12-11 戒馋,懒,贪

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