Abstract
Primary membranous nephropathy (MN) is due to autoantibodies to phospholipase A2 receptor (PLA2R Ab). It is unclear whether COVID-19 vaccines can trigger flares of glomerular diseases such as primary MN. There have been increasing reports of glomerular diseases presenting or flaring after receipt of COVID-19 vaccines. We present a patient with primary MN who developed nephrotic syndrome after receiving her second mRNA-1273 COVID-19 vaccine with positive PLA2R Ab. Renal biopsy confirmed primary MN. She was treated for her primary MN flare with rituximab in a manner similar to non-vaccine-associated MN, which led to significant reduction in both PLA2R Ab level and proteinuria. This case adds to the growing literature on MN flares after receipt of mRNA COVID-19 vaccines. Close follow-up of patients with primary MN and other glomerular diseases after COVID-19 vaccination is warranted. Further research is needed to determine the pathophysiology behind vaccine-induced MN flares and whether there is a potential association between exposure to SARS-CoV-2 antigens and loss of tolerance to the PLA2R antigen.
Author Contributions
Copyright© 2024
V. Liang Kelly, et al.
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Competing interests The authors declare that they have no competing interests.
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Introduction
Primary membranous nephropathy (MN) is most commonly due to phospholipase A2 receptor antibodies (PLA2R Ab). It is unclear whether the COVID-19 vaccine can trigger flares of glomerular diseases such as primary MN. Recently, there have been increasing reports of MN either presenting de novo or flaring after receipt of a COVID-19 vaccine. We present a patient with MN and metastatic breast cancer who developed nephrotic syndrome after receiving her second mRNA-1273 COVID-19 vaccine with positive PLA2R Ab suggesting primary MN flare. The objectives of this case report include: 1) To raise awareness of the risk for relapse of primary MN after mRNA COVID-19 vaccination; and 2) To review the literature on the association between COVID-19 vaccines and glomerular disorders.
Discussion
There is insufficient data on the risk of flares after COVID-19 vaccines in glomerular diseases. Autoimmunity may be triggered by vaccines, including flares of autoimmune glomerulonephritis (GN). MN has been reported following administration of the influenza vaccine. The following IgA nephropathy (IgAN) Anti-neutrophilic cytoplasmic antibody (ANCA)-associated vasculitis (AAV) Minimal change disease (MCD) Primary membranous nephropathy (MN) Anti-glomerular basement membrane (anti-GBM) disease The following IgAN MCD Primary MN Complement-mediated thrombotic microangiopathy IgG4-related disease (IgG4RD) Lupus nephritis (LN) class V Scleroderma renal crisis Summaries of reported cases of kidney diseases linked to COVID-19 vaccination have been published. The pathogenesis of vaccine-associated glomerular diseases is unclear, particularly for the COVID-19 mRNA vaccines, which utilize either a lipid nanoparticle (Pfizer-BioNTech BNT162b2 and Moderna mRNA-1273 vaccines) or an adenoviral vector (AstraZeneca) for mRNA delivery. The mRNA vaccines induce the recipient s cells to synthesize the COVID-19 spike protein via transcription of the injected mRNA. The immune response to vaccination involves both B and T cells. T cell responses, including T follicular helper (Tfh) cells, are stimulated by the lipid nanoparticle-mRNA vaccines. T-cell responses to foreign mRNA provoke swift production of cytokines, which could trigger podocytopathies and augment B-cell production of antibodies and glomerular diseases (e.g., MN). Different immune mechanisms may play prominent roles in different glomerular diseases following vaccination. It appears that onset of IgAN following COVID-19 vaccination occurs within 1-2 days. In these cases, COVID-19 vaccines may stimulate gut-associated lymphoid tissue (Peyer patches) responsible for IgA1 production, as IgA1 hyperresponsiveness has been observed in IgAN after influenza vaccination. This case of primary MN flare is only the second reported case of relapse of MN after mRNA COVID-19 vaccination. Only three total cases of MN after COVID-19 vaccination have been reported (two de novo and one relapse). Our patient was treated for her primary MN flare with rituximab in a manner similar to non-vaccine-associated MN. Like other reported cases, immunosuppression led to reduced proteinuria and decreased PLA2R Ab significantly. Therefore, close monitoring of patients with MN or other GN s after mRNA COVID-19 vaccination is warranted to allow early treatment to prevent progression to chronic kidney disease or end-stage renal disease.