Laboratory Medicine ›› 2020, Vol. 35 ›› Issue (11): 1143-1146.DOI: 10.3969/j.issn.1673-8640.2020.11.014

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Expression of TLR-4 and HMGB1 in peripheral blood of children with SLE and its clinical significance

LÜ Yingxia, YANG Junmei, ZHENG Lijuan, HUANG Qinghua   

  1. Henan Children’s Hospital,Zhengzhou Children’s Hospital,Zhengzhou Key Laboratory of Children’s Infection and Immunity,Zhengzhou 450053,Henan,China
  • Received:2019-12-13 Online:2020-11-30 Published:2020-12-01

Abstract:

Objective To investigate the roles of Toll-like receptor 4(TLR-4) and high mobility group protein B1(HMGB1) in peripheral blood of children with systemic lupus erythematosus(SLE). Methods Totally,40 children with SLE(SLE group) and 15 healthy children(control group) were enrolled. SLE group was classified into active group(20 cases) with systemic lupus erythematosus disease activity index(SLEDAI) score ≥10 and stable group(20 cases) with SLEDAI score <10,and according to presence or absence of nephritis,they were classified into nephritis group(24 cases) and non-nephritis group(16 cases). Serum interleukin(IL)-17,IL-23,HMGB1 and TLR-4 were determined. Pearson correlation analysis was used to analyze the correlations. Results Serum levels of IL-17,IL-23,HMGB1 and TLR-4 in SLE group were higher than those in control group(P<0.05). Serum levels of IL-17,IL-23,HMGB1 and TLR-4 in active group were higher than those in stable group(P<0.05). Serum levels of IL-17,IL-23,HMGB1 and TLR-4 in nephritis group were higher than those in non-nephritis group(P<0.05). HMGB1 was positively correlated with TLR-4,IL-17 and IL-23(r=0.424,0.563,0.498 and 0.745,P<0.05). IL-17 was positively correlated with SLEDAI score(r =0.726,P<0.05). IL-23 was positively correlated with SLEDAI score,IgM,IgG and C-reactive protein(CRP)(r=0.615,0.321,0.465 and 0.587,P<0.05). There was a negative correlation between C3 and C4(r =-0.461 and -0.399,P<0.05). HMGB1 was positively correlated with anti-double-stranded DNA(dsDNA) antibody,anti-Sm antibody,IgM and IgG(r=0.727,0.659,0.487 and 0.550,P<0.05). There was a negative correlation with C3(r=-0.367,P<0.05). TLR-4 was positively correlated with SLEDAI score,anti-dsDNA antibody,CRP and IgM(r=0.762,0.721,0.614 and 0.636,P<0.05). There was a negative correlation between C3 and C4(r=-0.520 and -0.434,P<0.05). Conclusions TLR-4 and HMGB1 are related to the occurrence and development of SLE in children,and they also play roles in renal injury in children with SLE.

Key words: Toll-like receptor 4, High mobility group protein B1, Systemic lupus erythematosus

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