Antibodies to M-type phospholipase A2 receptor (PLA2R) in membranous lupus nephritis.

Abstract:

BACKGROUND:Antibodies to M-type phospholipase A2 receptor (a-PLA2R) have been identified in most patients with idiopathic membranous nephropathy, but the prevalence in membranous lupus nephritis (MLN) is still unclear. The objective of this study was to assess the prevalence of a-PLA2R antibodies in a large cohort of patients with lupus nephritis. METHODS:a-PLA2R antibodies were measured by ELISA in serum from patients with systemic lupus erythematosus ( n = 190), of whom 37 had a biopsy-proven MLN. Positive samples were confirmed by commercial ELISA kit, Western blot and immunohistochemistry in renal tissue. RESULTS:A total of 10 from 190 patients (5.3%) with systemic lupus erythematosus had circulating a-PLA2R measured by in-house ELISA assay. The antibodies were detected in 7 patients with MLN (18.9%) and 3 patients with non-renal lupus disease (3.2%). PLA2R staining was detected in the kidney biopsy of 5 of the 7 (71.4%) patients with MLN. a-PLA2R levels were associated with active disease but not proteinuria levels. Presence of a-PLA2R antibodies at baseline was associated with worse remission rates and longer time to remission compared to those patients serologically negative. CONCLUSIONS:a-PLA2R antibodies can be detected with low prevalence in MLN patients, but their detection is associated with a worse renal prognosis.

journal_name

Lupus

journal_title

Lupus

authors

Garcia-Vives E,Solé C,Moliné T,Alvarez-Rios AM,Vidal M,Agraz I,Ordi-Ros J,Cortés-Hernández J

doi

10.1177/0961203319828521

subject

Has Abstract

pub_date

2019-03-01 00:00:00

pages

396-405

issue

3

eissn

0961-2033

issn

1477-0962

journal_volume

28

pub_type

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