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Biological or Clinical Significance:

Myeloperoxidase (MPO) is a peroxidase enzyme that in humans is encoded by the MPO gene on chromosome 17. MPO is most abundantly expressed in neutrophil granulocytes (a subtype of white blood cells), and produces hypohalous acids to carry out their antimicrobial activity. It is a lysosomal protein stored in azurophilic granules of the neutrophil and released into the extracellular space during degranulation.

Antibodies against MPO have been implicated in various types of vasculitis, and eosinophilic granulomatosis with polyangiitis. Recent studies have reported an association between elevated myeloperoxidase levels and the severity of coronary artery disease. Elevated MPO levels more than doubled the risk for cardiovascular mortality over a 13-year period. It has also been suggested that myeloperoxidase plays a significant role in the development of the atherosclerotic lesion and rendering plaques unstable.

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MPO

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Experienced Running

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