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Expression of phospholipase A2 receptor and IgG4 in patients with membranous nephropathy

Lei Liu1, Baochao Chang1, Xueping Wu1

  • 1Department of Nephrology, The First Affiliated Hospital of Bengbu Medical College, Anhui, People's Republic of China.

Vascular Health and Risk Management
|June 9, 2018
PubMed
Abstract

Insights

Detecting phospholipase A2 receptor (PLA2R) in kidney tissue and serum aids in diagnosing membranous nephropathy (MN). High PLA2R and IgG4 levels in kidney tissue distinguish idiopathic MN from other forms.

Area of Science:

  • Nephrology
  • Immunopathology
  • Diagnostic Biomarkers

Background:

  • Membranous nephropathy (MN) is a leading cause of nephrotic syndrome in adults.
  • Idiopathic MN (IMN) and secondary MN (SMN) require accurate differentiation for appropriate management.
  • Phospholipase A2 receptor (PLA2R) is a key antigen implicated in the pathogenesis of IMN.

Purpose of the Study:

  • To assess PLA2R expression in kidney tissue across IMN, SMN, and non-MN groups.
  • To evaluate the diagnostic utility of kidney tissue PLA2R and serum anti-PLA2R antibodies for MN.
  • To explore correlations between PLA2R, anti-PLA2R antibodies, and clinical features in MN patients.

Main Methods:

  • Kidney biopsy specimens analyzed via immunofluorescence for PLA2R and IgG4.
  • Serum anti-PLA2R antibody levels quantified using enzyme-linked immunosorbent assay (ELISA).
  • Statistical analysis of positive/negative rates, sensitivity, and specificity for differential diagnosis.

Main Results:

  • Significantly higher PLA2R and IgG4 expression in IMN kidney tissue compared to SMN and non-MN.
  • No significant difference in PLA2R/IgG4 between SMN and non-MN groups.
  • 100% coincidence rate observed between serum anti-PLA2R antibody and kidney tissue PLA2R detection.

Conclusions:

  • Kidney tissue PLA2R and IgG4 expression are crucial for pathological diagnosis of MN.
  • Serum anti-PLA2R antibody detection demonstrates high diagnostic value for MN.
  • These biomarkers aid in differentiating IMN from other forms of MN.
Keywords:
IgG4PLA2Rmembranous nephropathy

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