Tianjin Medical Journal ›› 2023, Vol. 51 ›› Issue (7): 751-755.doi: 10.11958/20222046

• Clinical Research • Previous Articles     Next Articles

Analysis of the urinary protein and pathological characteristics of IgA vasculitis with nephritis in children with dyslipidemia

BAI Mengke1,2(), YANG Xiaoqing1,2, MEI Xiaofeng1,2, LI Jin’gang1,2, ZHANG Qiushuang1,2, HUANG Yanjie1,2,()   

  1. 1 Department of Pediatrics, the First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou 450000, China
    2 College of Pediatrics, Henan University of Traditional Chinese Medicine
  • Received:2022-12-09 Revised:2023-02-10 Published:2023-07-15 Online:2023-07-18
  • Contact: HUANG Yanjie E-mail:huangyanjie69@163.com

Abstract:

Objective To investigate the effect of dyslipidemia on urinary protein and pathological characteristics in children with immunoglobulin vasculitis with nephritis (IgAVN). Methods A total of 316 children with IgAVN diagnosed clinically and pathologically were selected. Children with IgAVN were divided into the normal lipid group (121 cases) and the dyslipidemia group (195 cases) according to the condition of blood lipid. The dyslipidemia group was further divided into the hypercholesterolemia group (55 cases), the hypertriglyceridemia group (44 cases), the mixed hyperlipidemia group (58 cases) and the low high density lipoprotein cholesterol (HDL-C) group(38 cases). The children's sex, age, 24-hour urinary protein quantification (24 hUP), urinary protein/creatinine (UPCR), urinary immunoglobulin G/creatinine (UIgG/Cr), urinary retinol-binding protein/creatinine (URBP/Cr), urinary red blood cell count (URBC), serum albumin, total cholesterol (TC), triacylglycerol (TG) and HDL-C were collected. The renal pathology was graded according to the IgAVN grading standard of the International Study of Kidney Disease in Children. According to the Oxford pathological classification of IgA nephropathy (IgAN), children were scored semi-quantitatively. Clinical data and pathological characteristics of the normal and abnormal blood lipid groups and each subgroup were compared. Results The serum albumin level decreased in the dyslipidemia group, and the proportion of children with 24 h UP, UPCR, UIgG/Cr, URBP/Cr levels, and serum albumin<30 g/L were higher than those in the normal lipid group (P<0.05). The pathological grading of children was mainly grade Ⅲ (223 cases, 70.6%) and grade Ⅱ (82 cases, 25.6%), of which children with grade Ⅳ (11 cases, 3.8%) were all in the dyslipidemia group. The proportion of pathological grade Ⅲ+Ⅳ, diffuse mesangial hyperplasia (Mb), glomerular segmental sclerosis or adhesion (S1) was higher in the dyslipidemia group than that in the normal blood lipid group (P<0.05). Compared with the normal blood lipid group, URBP/Cr increased and serum albumin decreased in the hypercholesterolemia group, while 24 h UP, UPCR, UIgG/Cr, URBP/Cr, URBC increased and serum albumin decreased in the mixed hyperlipidemia group (P<0.05). The proportion of pathological grade Ⅲ+Ⅳ, Mb and S1 was increased in the hypercholesterolemia group and the combined hyperlipidemia group (P<0.05). Conclusion IgAVN children with hypercholesterolemia and mixed hyperlipidemia, whose renal pathological damage and proteinuria are more serious than those with normal blood lipids, should be actively treated with lipid-lowering therapy.

Key words: vasculitis, nephritis, immunoglobulin A, dyslipidemias, proteinuria, pathological features

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