iagnostic value and clinical significance of detecting serum M -type phosphatase A2 receptor combined with renal tissue IgG 4 in adults with idiopathic membranous nephropathy
JIANG Fang1 ZHOU Qun1 KANG Wen-ling1 JIANG Xiao-lin2 LIU Jin-mei1
1. Department of Nephrology, Xinyu People′s Hospital
2. Department of Traditional Chinese and Western Medicine
Abstract:Objective To investigate the diagnostic value and clinical significance of detecting serum M-type phosphatase A2 receptor (PLA2R) combined with renal tissue immunoglobulin 4 (IgG 4) in idiopathic membranous nephropathy (IMN) in adults. Methods The clinical data of 70 patients with membranous nephropathy admitted to Xinyu People′s Hospital from April 2017 to April 2019 were retrospectively collected, and divided into IMN group (30 cases) and secondary membranous nephropathy group (40 cases) according to the etiology. All patients received serum PLA2R and renal tissue IgG 4 detection, and the diagnostic value of serum PLA2R combined with renal tissue IgG 4 detection for IMN was analyzed. Results The level of serum PLA2R in IMN group was higher than that in SMN group, and the difference was statistically significant (P<0.05). The ROC curve was drawn with serum PLA2R level as the test variable and the incidence of IMN disease as the dependent variable (1=IMN, 0=SMN). The diagnostic threshold of IMN was 25.641 RU/mL of serum PLA2R, when serum PLA2R>25.641 RU/mL was identified as IMN. At this time, the diagnostic AUC was 0.919 (P<0.05). The diagnostic accuracy of serum PLA2R and renal tissue IgG 4 combined detection for IMN was 93.33%, which was higher than that of serum PLA2R and renal tissue IgG 4 alone detection (81.43%,85.71%), the differences were statistically significant (P<0.05). The serum levels of PLA2R and renal tissue IgG 4 alone in detecting IMN were in good consistency with renal biopsy (Kappa=0.622, 0.706). Combined detection of IMN and renal biopsy showed great consistency (Kappa=0.912). Conclusion The detection of serum PLA2R combined with renal tissue IgG 4 has a high diagnostic value for IMN disease. Targeted preventive measures can be made in time according to the detection results of serum PLA2R combined with renal tissue IgG 4 in clinical practice.
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