Journal of Clinical Pediatrics ›› 2022, Vol. 40 ›› Issue (10): 739-744.doi: 10.12372/jcp.2022.21e1211

• Rheumatic and Immune Disease • Previous Articles     Next Articles

Clinical significance of perinuclear anti-neutrophil cytoplasmic antibody in children with systemic lupus erythematosus

HE Ping, SHEN Jia(), XU Dan, WANG Ziyan   

  1. Department of Clinical Laboratory, Children's Hospital Affiliated to Soochow University, Suzhou 215003, Jiangsu, China
  • Received:2021-08-23 Online:2022-10-15 Published:2022-10-12
  • Contact: SHEN Jia E-mail:651564374@qq.com

Abstract:

Objective To investigate the clinical significance of perinuclear anti-neutrophil cytoplasmic antibody (p-ANCA) in children with systemic lupus erythematosus. Methods The clinical data of SLE children treated from January 2016 to July 2021 were retrospectively analyzed. The autoantibody related indexes, immune function, renal function and renal pathology of pANCA positive and negative children were analyzed. Results A total of 191 SLE children (160 girls and 31 boys) were enrolled, and the average age was (12.0±3.5) years. There were 81 children in pANCA positive group, among whom 26 were formaldehyde-resistant pANCA positive and 55 were formaldehyde-sensitive pANCA positive. Anti-myeloperoxidase (MPO) antibody was positive in 29 children, accounting for 35.8% of pANCA positive children. Compared with pANCA negative group, children in pANCA positive group had higher ESR, lower Hb, and higher positive rates of antinuclear antibody, anti-double-stranded DNA (dsDNA) antibody, anti-Sjögren's-syndrome-related antigen A (SSA) autoantibody, anticentromere protein B (CENP-B) antibody, anti-histone antibody, anti-ribosome ribonucleoprotein (rRNP) antibody, anti-nucleosome antibody and anti-Ro-52 antibody. The differences were statistically significant (P<0.05). Compared with pANCA negative group, pANCA positive group had lower levels of complement C3 and C4, higher levels of urinary creatinine (UCr), urinary immunoglobulin G/UCr, α1-microglobulin/UCr, β1-microglobulin/UCr and urinary microalbumin/UCr, and higher proportion of urinary occult blood and urinary protein, and the differences were statistically significant (P<0.05). A total of 112 children with SLE underwent renal biopsy. Compared with the pANCA negative group, the proportion of mesangial hyperplasia and the deposition proportion of IgG, IgM, IgA, C1q and C3 in glomerular mesangium and capillary loop was higher in the pANCA positive group, and the differences were statistically significant (P<0.05). Conclusions In children with SLE, pANCA positive children are more likely to have renal injury and more severe symptoms.

Key words: systemic lupus erythematosus, antineutrophil cytoplasmic antibody, renal pathology, child