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Antibodies against M-Type Phospholipase A2 Receptor May Predict Treatment Response and Outcome in Membranous

Zhen Qu1, Mu-Fan Zhang1, Zhao Cui2

  • 1Renal Division, Department of Medicine, Peking University First Hospital, Institute of Nephrology, Peking University, Key Laboratory of Renal Disease, Ministry of Health of China, Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China, Beijing, China.

American Journal of Nephrology
|November 26, 2018
PubMed
Abstract

Insights

Anti-phospholipase A2 receptor (PLA2R) antibodies are key in diagnosing primary membranous nephropathy (pMN). Higher PLA2R antibody levels correlate with worse outcomes and predict treatment response and kidney health in pMN patients.

Area of Science:

  • Nephrology
  • Immunology
  • Clinical Diagnostics

Background:

  • Anti-phospholipase A2 receptor (PLA2R) antibodies are diagnostic markers for primary membranous nephropathy (pMN).
  • Prevalence and clinical significance of these antibodies vary across patient cohorts.
  • The prognostic value of antibody levels for treatment response and kidney outcomes remains debated.

Purpose of the Study:

  • To investigate the association between anti-PLA2R antibody levels and clinical severity in a Chinese pMN cohort.
  • To evaluate the predictive value of anti-PLA2R antibodies for treatment response and kidney outcomes in pMN.
  • To establish correlations between antibody levels and disease progression.

Main Methods:

  • Enrolled 359 kidney biopsy-proven pMN patients.
  • Detected anti-PLA2R antibodies using immunofluorescence assay (IFA) and enzyme-linked immunosorbent assay (ELISA).
  • Analyzed correlations between antibody levels, proteinuria, treatment response, and kidney outcomes during follow-up.

Main Results:

  • Anti-PLA2R antibody positivity rates were 65.2% (IFA) and 56.3% (ELISA).
  • Higher antibody levels correlated with increased urinary protein excretion and predicted poor treatment response and spontaneous remission.
  • Elevated antibody levels were an independent risk factor for kidney dysfunction during follow-up.

Conclusions:

  • This study documents significant correlations between anti-PLA2R antibody levels and clinical severity in a large Chinese pMN cohort.
  • Antibody positivity and higher levels may predict treatment responses and kidney outcomes in pMN.
  • Anti-PLA2R antibody levels serve as a valuable prognostic marker in pMN management.
Keywords:
AntibodyBiomarkerMembranous nephropathyPhospholipase A2 receptorRisk stratification

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