Human Myeloperoxidase (MPO) ELISA Kit — Application Scenarios for Inflammation and Cardiovascular Research
MPO: The Green Hemoprotein That Bleaches Your Arteries
Myeloperoxidase (MPO) is the only human enzyme whose product smells like a swimming pool. Stored in the azurophilic (primary) granules of every neutrophil and released in bulk during degranulation and NETosis, MPO catalyzes the deceptively simple reaction H₂O₂ + Cl⁻ → HOCl + H₂O — converting harmless peroxide into hypochlorous acid, the same bleach you buy in a jug, and the single most reactive oxidant the innate immune system deliberately deploys. That green tint you sometimes see in purulent fluid? That's ferric-oxy MPO (Fe³⁺-OH, λₘₐₓ ~470 nm)[reference:19].
But the clinical reality is far more nuanced than "green pus = infection": circulating and plaque-associated MPO has been repeatedly pinned as a prognostic oxidant in acute coronary syndromes, vulnerable plaque rupture, ANCA-associated vasculitis, severe sepsis/ARDS, and even CKD progression, because HOCl doesn't stop at bacteria — it chlorinates cholesterol esters, modifies apoB, oxidizes phospholipids, and pits the vascular wall into a self-propagating oxidative inflammation loop[reference:20].
Abbkine's Human Myeloperoxidase (MPO) ELISA Kit (KTE61560) is the tool that lets you quantify this dangerous hemoprotein as a calibrated sandwich-ELISA concentration (ng/mL), so your neutrophil-activation story rests on a number — not a MPO-DAB stain you squint at through a microscope[reference:21].
Cardiovascular Research: From Vulnerable Plaque to Endothelial Dysfunction
MPO is a prognostic oxidant in acute coronary syndromes and a driver of plaque instability. Cardiovascular researchers use this kit to:
- Quantify MPO in plasma and serum from ACS patients
- Study MPO's role in endothelial dysfunction and plaque rupture
- Investigate MPO-oxidized LDL and foam cell formation
- Monitor MPO as a biomarker for cardiovascular risk stratification
The kit is validated for plasma, serum, cell culture supernatants, and other biological fluids, with a validated standard curve (R²=0.9921) — the gold standard for quantitative ELISA data[reference:22].
Inflammation and Infectious Disease Research
MPO is a core mediator of innate immune microbicidal activity. Inflammation researchers use this kit to:
- Quantify MPO in neutrophil-rich cell culture supernatants
- Monitor MPO release during NETosis and degranulation
- Study MPO in sepsis, ARDS, and ANCA-associated vasculitis
- Investigate MPO as a biomarker of neutrophil activation
Critical sample handling: For neutrophil-rich cell culture supernatants, harvest at 80–90% confluency and centrifuge at 1200×g for 15 minutes at 4°C immediately after collection. Add a serine protease inhibitor cocktail (excluding EDTA) upon collection, as neutrophil-derived proteases rapidly degrade extracellular MPO at room temperature[reference:23].
Autoimmune Disease Research
MPO is a target antigen in ANCA-associated vasculitis (MPO-ANCA). Autoimmune disease researchers use this kit to:
- Quantify MPO in patient serum and plasma
- Study MPO-ANCA titers and disease activity
- Investigate MPO's role in autoimmune vascular inflammation
Why Choose This Kit for Your MPO Research?
| Feature | Benefit |
|---|---|
| Two-site sandwich ELISA | Quantitative, specific detection |
| Human-specific | No cross-reactivity with analogues |
| Validated standard curve | R²=0.9921 — gold standard for quantitative ELISA |
| Sample-specific protocols | MPO-specific preprocessing to prevent enzymatic degradation |
| Multiple sample types | Plasma, serum, cell culture supernatants |
| Complete components | Ready-to-use — pre-coated plate, standards, detection antibodies, all buffers |
Key Sample Handling Tips
- Plasma: Use EDTA-anticoagulated tubes exclusively — heparin and citrate chelate the heme group of MPO, disrupting structural integrity and reducing antibody binding efficiency by up to 40% [reference:24]
- Centrifugation: 1500×g for 20 minutes at 4°C within 30 minutes of collection
- Hemolysis: Discard hemolyzed plasma — hemoglobin exhibits peroxidase-like activity that interferes with MPO detection[reference:25]
- Storage: Aliquot and store at –80°C; avoid repeated freeze-thaw cycles
🔬 Which research field does your work belong to?
Cardiovascular Research | Inflammation & Immunology | Infectious Disease | Autoimmune Disease | Other
Share your application with us — we'd love to hear how you're using this kit in your studies!
📌 Reference Link: Human Myeloperoxidase (MPO) ELISA Kit — KTE61560
