What is myeloperoxidase doing in ANCA-associated glomerulonephritis?

Couser, William G; Johnson, Richard J · Kidney Int · 2015

Level V

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Abstract

O'Sullivan et al. describe glomerular localization of myeloperoxidase (MPO) in anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) and correlate the amount of deposition with severity of injury. MPO is the antigen against which anti-MPO ANCAs are directed, the antigen to which pathogenic T cells that can induce antibody-independent AAV are directed, and MPO can induce glomerular injury directly by interacting with H2O2 and a halide to halogenate glomerular structures. All three of these roles are likely involved in human disease.

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