Clinical phenotypes and renal outcomes in PLA2R-associated membranous nephropathy: a multi-center cohort study with

Jing Miao1, Jaleh Zand1, Lisa Vaughan2

  • 1Division of Nephrology and Hypertension, Department of Medicine, Mayo Clinic, Rochester, MN, USA.

Abstract

Insights

Identifying distinct clinical phenotypes in phospholipase A2 receptor-associated membranous nephropathy (PLA2R-MN) is key. Phenotype-based risk stratification can improve patient outcomes and treatment precision for this common cause of nephrotic syndrome.

Area of Science:

  • Nephrology
  • Immunology
  • Internal Medicine

Background:

  • Phospholipase A2 receptor (PLA2R)-associated membranous nephropathy (MN) is a leading cause of nephrotic syndrome in adults.
  • Understanding clinical phenotypes is crucial for predicting renal outcomes in PLA2R-MN.

Purpose of the Study:

  • To investigate the relationship between clinical phenotypes and renal outcomes in PLA2R-positive MN.
  • To explore the potential for phenotype-based treatment stratification in PLA2R-MN.

Main Methods:

  • Retrospective, multi-center cohort study of 178 patients with PLA2R-positive MN.
  • Unsupervised cluster analysis to group patients based on clinicopathological characteristics.
  • Primary outcomes included remission of nephrotic syndrome and progression to end-stage kidney disease (ESKD) or death.

Main Results:

  • Three distinct patient clusters were identified, with varying remission rates (72% in cluster 1, 50% in cluster 2, 54% in cluster 3).
  • Elevated anti-PLA2R levels and proteinuria predicted reduced remission, while high-density lipoprotein levels were protective.
  • ESKD-free survival significantly differed across the identified clusters.

Conclusions:

  • Unsupervised clustering revealed distinct clinical phenotypes in PLA2R-positive MN, each linked to different renal prognoses.
  • Phenotype-based risk stratification may enhance treatment precision and improve patient outcomes in PLA2R-MN.
  • This approach could potentially reduce treatment-related adverse effects.