MPO ELISA is a laboratory test that measures myeloperoxidase (MPO), an enzyme released by white blood cells during inflammation, using an enzyme-linked immunosorbent assay. It quantifies MPO concentration in blood or other fluids by antibody capture and colorimetric detection. Results help assess systemic inflammation and cardiovascular risk, monitor inflammatory or infectious conditions, and study oxidative tissue injury.

The anti‑MPO (anti‑myeloperoxidase) test detects antibodies against neutrophil myeloperoxidase. It helps diagnose and monitor ANCA‑associated small‑vessel vasculitides—especially microscopic polyangiitis and some cases of eosinophilic granulomatosis with polyangiitis—and renal‑limited vasculitis. Results support clinical assessment, guide treatment decisions, and track disease activity or relapse, but must be interpreted alongside symptoms, imaging and other lab tests.

MPO stands for myeloperoxidase, an enzyme produced by neutrophils and monocytes. Levels rise with inflammation and oxidative stress and can indicate active vascular inflammation and unstable atherosclerotic plaque. Elevated MPO is linked to higher risk of coronary artery disease and acute coronary syndromes; clinicians may use it for cardiovascular risk assessment. Interpretation depends on clinical context and lab reference ranges.

ANCA ELISA is a laboratory immunoassay that detects anti‑neutrophil cytoplasmic antibodies in patient serum. Wells coated with specific antigens (commonly PR3 and MPO) bind ANCA; an enzyme‑linked secondary antibody produces a color change after adding substrate. The intensity correlates with antibody level. It helps diagnose and monitor ANCA‑associated vasculitides and complements immunofluorescence testing.

The full form of IgM ELISA is Immunoglobulin M Enzyme-Linked Immunosorbent Assay. It is a laboratory test that detects IgM class antibodies in blood or other samples, typically indicating a recent or acute infection. ELISA uses enzyme-labeled reagents to bind antibodies or antigens and produces a measurable color change to determine presence and approximate quantity of IgM antibodies.

Myeloperoxidase (MPO) is an enzyme stored in neutrophil and monocyte granules that drives the oxidative burst. It converts hydrogen peroxide and chloride into microbicidal hypochlorous acid to kill pathogens. Elevated MPO activity or blood levels indicate neutrophil activation and inflammation, and are linked to tissue damage and higher cardiovascular risk; MPO is used as a clinical inflammation biomarker.