甲状腺球蛋白抗体和甲状腺过氧化物酶抗体在儿童免疫性血小板减少症中的表达及临床意义

Expression of thyroglobulin antibody and thyroid peroxidase antibody in children with immune thrombocytopenia

摘要:

目的 观察免疫性血小板减少症（immune thrombocytopenia，ITP）患儿血清甲状腺球蛋白抗体（thyroglobulin antibody，TGAb）、甲状腺过氧化物酶抗体（thyroid peroxidase antibody，TPOAb）的表达情况。 方法 前瞻性选择2019年10月至2021年10月收治的120例ITP患儿作为ITP组，另选择60例非ITP患儿作为非ITP组。根据ITP临床分型将ITP组患儿分为新诊断ITP（n=53）、持续性ITP（n=42）与慢性ITP（n=25）。比较ITP组与非ITP组、不同ITP临床分型患儿临床资料，分析ITP患儿血清TGAb、TPOAb表达情况，及其与ITP临床分型的关系。 结果 ITP组CD₃⁺、CD₄⁺比例及血小板计数低于非ITP组，CD₈⁺比例及TGAb、TPOAb水平高于非ITP组（P<0.05）；慢性ITP患儿CD₃⁺、CD₄⁺比例及血小板计数低于新诊断ITP、持续性ITP患儿，CD₈⁺比例及TGAb、TPOAb高于新诊断ITP、持续性ITP患儿（P<0.05）。经logistic回归分析结果显示，CD₃⁺、CD₄⁺、CD₈⁺、TGAb、TPOAb表达水平变化与慢性ITP的发生密切相关（P<0.05）；绘制决策曲线，结果显示，在高风险阈值0.0~1.0范围内TGAb联合TPOAb评估儿童ITP临床分型的净收益率始终>0，有临床意义。 结论 TGAb、TPOAb在ITP患儿中呈异常表达，且与患儿ITP临床分型有关。 引

Abstract:

Objective To examine the expression of serum thyroglobulin antibody (TGAb) and thyroid peroxidase antibody (TPOAb) in children with immune thrombocytopenia (ITP). Methods A total of 120 children with ITP who were admitted from October 2019 to October 2021 were enrolled as the ITP group. A total of 60 children without ITP were enrolled as the non-ITP group. According to the clinical classification of ITP, the children in the ITP group were further divided into a newly diagnosed ITP group, a persistent ITP group, and a chronic ITP group. The clinical data were compared between the ITP group and the non-ITP group and between the children with different clinical classifications of ITP. The expression levels of serum TGAb and TPOAb in children with ITP were measured and their association with the clinical classification of ITP was analyzed. Results Compared with the non-ITP group, the ITP group had significantly lower levels of CD3+, CD4+, and platelet count (PLT) and significantly higher levels of CD8+, TGAb, and TPOAb (P<0.05). The children with chronic ITP had significantly lower levels of CD3+, CD4+, and PLT and significantly higher levels of CD8+, TGAb, and TPOAb than those with newly diagnosed ITP or persistent ITP (P<0.05). The logistic regression analysis showed that CD3+, CD4+, CD8+, TGAb, and TPOAb were the influencing factors for chronic ITP (P<0.05). A decision curve was plotted, and the results showed that TGAb combined with TPOAb within the high-risk threshold range of 0.0-1.0 had a net benefit rate of >0 in evaluating the clinical classification of ITP in children. Conclusions TGAb and TPOAb are abnormally expressed in children with ITP and are associated with the clinical classification of ITP in children.