{"term":{"id":"13488","title":"myeloperoxidase","longtitle":"IUPAC Gold Book - myeloperoxidase","doi":"10.1351\/goldbook.13488","code":"13488","status":"current","initialism":"<em>initialism<\/em>: MPO","definitions":[{"id":1,"text":"Enzyme found in azurophilic granules of neutrophils, the major target of antineutrophil cytoplasmic autoantibody (ANCA).","notes":{"1":"MPO autoantibodies are diagnostic markers for microscopic polyangiitis, rapidly progressive glomerulonephritis, and Goodpasture disease or syndrome.","2":"MPO autoantibodies are also found in patients exposed to silica or drugs (e.g., hydralazine, propylthiouracil, D-penicillamine) as well as in some patients with Wegener granulomatosis (WG) and other autoimmune diseases."},"links":[{"term":"Goodpasture disease","url":"https:\/\/goldbook.iupac.org\/terms\/view\/13178"},{"term":"Wegener granulomatosis (WG)","url":"https:\/\/goldbook.iupac.org\/terms\/view\/13782"},{"term":"antineutrophil cytoplasmic autoantibody (ANCA)","url":"https:\/\/goldbook.iupac.org\/terms\/view\/12896"},{"term":"autoantibodies","url":"https:\/\/goldbook.iupac.org\/terms\/view\/12913"},{"term":"autoimmune diseases","url":"https:\/\/goldbook.iupac.org\/terms\/view\/12919"},{"term":"glomerulonephritis","url":"https:\/\/goldbook.iupac.org\/terms\/view\/13174"},{"term":"neutrophils","url":"https:\/\/goldbook.iupac.org\/terms\/view\/13510"}],"sources":["PAC, 2012, 84, 1113. 'IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)' on page 1217 (https:\/\/doi.org\/10.1351\/PAC-REC-11-06-03)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/13488\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/13488\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/13488\/plain"},"citation":"Citation: 'myeloperoxidase' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351\/goldbook.13488","license":"The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/) for individual terms.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2026-05-11T02:44:31+00:00"}}