| First Author | Wang C | Year | 2019 |
| Journal | Proc Natl Acad Sci U S A | Volume | 116 |
| Issue | 24 | Pages | 11966-11971 |
| PubMed ID | 31123149 | Mgi Jnum | J:276371 |
| Mgi Id | MGI:6314642 | Doi | 10.1073/pnas.1818434116 |
| Citation | Wang C, et al. (2019) An activatable PET imaging radioprobe is a dynamic reporter of myeloperoxidase activity in vivo. Proc Natl Acad Sci U S A 116(24):11966-11971 |
| abstractText | Myeloperoxidase (MPO) is a critical proinflammatory enzyme implicated in cardiovascular, neurological, and rheumatological diseases. Emerging therapies targeting inflammation have raised interest in tracking MPO activity in patients. We describe (18)F-MAPP, an activatable MPO activity radioprobe for positron emission tomography (PET) imaging. The activated radioprobe binds to proteins and accumulates at sites of MPO activity. The radioprobe (18)F-MAPP has a short blood half-life, remains stable in plasma, does not demonstrate cytotoxicity, and crosses the intact blood-brain barrier. The (18)F-MAPP imaging detected sites of elevated MPO activity in living mice embedded with human MPO and in mice induced with chemical inflammation or myocardial infarction. The (18)F-MAPP PET imaging noninvasively differentiated varying amounts of MPO activity, competitive inhibition, and MPO deficiency in living animals, confirming specificity and showing that the radioprobe can quantify changes in in vivo MPO activity. The radiosynthesis has been optimized and automated, an important step in translation. These data indicate that (18)F-MAPP is a promising translational candidate to noninvasively monitor MPO activity and inflammation in patients. |
