• Medicina clinica · Nov 2023

    Serum PLA2R antibody as a predictive biomarker for venous thromboembolism risk in primary membranous nephropathy.

    • Jiayi Li, Xu Wang, Shimin Jiang, and Wenge Li.
    • Department of Nephrology, Peking University China-Japan Friendship School of Clinical Medicine, Beijing, China; Department of Nephrology, China-Japan Friendship Hospital, Beijing, China.
    • Med Clin (Barc). 2023 Nov 24; 161 (10): 417421417-421.

    BackgroundPatients with nephrotic syndrome are at high risk of venous thromboembolism (VTE), especially for primary membranous nephropathy (PMN). The phospholipase A2 receptor (PLA2R) is a marker of primary membranous nephropathy activity. This study investigated the predictive value of PLA2R antibodies in PMN for VTE.MethodsIn this retrospective study, we included 97 PMN patients and evaluated the predictive value of serum PLA2R antibodies for VTE risk. Lower extremity venous ultrasound, renal vein ultrasound, or spiral computed tomography pulmonary arteriography were used to assess VTE events. Serum anti-PLA2R antibodies were detected by enzyme-linked immunosorbent assay (ELISA). The risk of VTE was stratified according to serum albumin levels.ResultsTwenty PMN patients (21%) had thromboembolic events. Eight (15%) of patients with serum albumin >25g/l developed VTE, 6 of whom were positive for serum PLA2R antibodies. Positive serum PLA2R antibodies were significantly associated with VTE events in patients with serum albumin >25g/l (p=0.01). Age, sex, blood creatinine, serum albumin, and 24-h urine protein levels were not statistically different between the two groups. Kaplan-Meier analysis using the log-rank test revealed anti-PLA2R positive membranous nephropathy patients had more probability of VTE events than anti-PLA2R negative patients. Univariate Cox proportional hazards analysis revealed that lnPLA2R-Ab is an unfavorable predictor for VTE events in patients with serum albumin >25g/l (hazard ratio (HR) 2.1, p=0.01).ConclusionsThe PLA2R antibody was a risk predictor for thromboembolic events in patients with primary membranous nephropathy with serum albumin >25g/l.Copyright © 2023 Elsevier España, S.L.U. All rights reserved.

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