Laboratory Medicine ›› 2023, Vol. 38 ›› Issue (6): 590-593.DOI: 10.3969/j.issn.1673-8640.2023.06.016

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Clinical roles of NLR,PLR,MPR and immunoglobulin determination in ASO-positive HSPN children

LIU Can, LUO Lingli, FU Min   

  1. Department of Clinical Laboratory,Hunan Children's Hospital,Changsha 410000,Hunan,China
  • Received:2021-10-31 Revised:2022-10-31 Online:2023-06-30 Published:2023-08-22

Abstract:

Objective To investigate the clinical roles of neutrophil-to-lymphocyte ratio(NLR),platelet-to-lymphocyte ratio(PLR),mean platelet volume-to-platelet ratio(MPR) and immunoglobulins in children with anti-streptolysin O(ASO)-positive Henoch-Sch?nlein purpura nephritis(HSPN). Methods Totally,110 children with Henoch-Sch?nlein purpura(HSP) were enrolled from Hunan Children's Hospital from January 2020 to January 2021 and classified into ASO group(46 cases) and uninfected group(64 cases) according to whether they were positive for ASO,and the ASO group was further classified into ASO-HSPN group(28 cases) and ASO-HSP group(18 cases) according to the presence or absence of renal lesions. Totally,98 healthy children from Hunan Children's Hospital were enrolled as healthy control group. Blood routine test was performed,IgA,IgG and IgM levels were determined,and NLR,PLR and MPR were calculated. Binary Logistic regression analysis was used to assess the risk factors for the development of HSPN in children with ASO-positive HSP. Receiver operating characteristic(ROC) curve was used to evaluate the value of each index for the diagnosis of ASO-positive HSPN. Results IgA,IgG,IgM and NLR in ASO group and uninfected group were higher than those in healthy control group(P<0.001). There was statistical significance for MPR and PLR between uninfected group and healthy control group(P<0.01). Compared with uninfected group,IgA,IgG and IgM in ASO group were increased(P<0.05). The proportion of joint and kidney involvement in ASO group was slightly higher than that in uninfected group(P>0.05). MPR in ASO-HSPN group was higher than that in ASO-HSP group(P=0.002),and the differences in the other indicators were not statistically significant between the 2 groups(P>0.05). Binary Logistic regression analysis showed that MPR was a risk factor for the development of HSPN in children with ASO-positive HSP [odds ratio(OR)= 3.142,95% confidence interval(CI) 1.414-8.657,P=0.027]. The results of ROC curve analysis showed that the area under curve of MPR for the diagnosis of ASO-positive HSPN was 0.780,with an optimal cut-off value of 0.032. The sensitivity was 64.3%,and the specificity was 88.9%. Conclusions HSP combined with streptococcal infection can lead to severe humoral immune dysfunction. MPR has some value in the ancillary diagnosis of ASO-positive HSPN.

Key words: Neutrophil-to-lymphocyte ratio, Platelet-to-lymphocyte ratio, Mean platelet volume-to-platelet ratio, Immunoglobulin, Henoch-Sch?nlein purpura, Henoch-Sch?nlein purpura nephritis

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