{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T15:50:53Z","timestamp":1790437853957,"version":"4.1.0"},"reference-count":37,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"3","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["Circulation Research"],"published-print":{"date-parts":[[2008,2,15]]},"abstract":"<jats:p>In atherosclerosis, circulating platelets interact with endothelial cells and monocytes, leading to cell activation and enhanced recruitment of leukocytes into the vascular wall. The invasion of monocytes is accompanied by overexpression of matrix metalloproteinases (MMPs), which are thought to promote atherosclerosis and trigger plaque rupture. Following interaction with itself, the extracellular matrix metalloproteinase inducer (EMMPRIN) induces MMP synthesis via a little-known intracellular pathway. Recently, we showed upregulation of EMMPRIN on monocytes during acute myocardial infarction. EMMPRIN also stimulates secretion of MMP-9 by monocytes and of MMP-2 by smooth muscle cells, indicating that it may be an important regulator of MMP activity. Expression of EMMPRIN on platelets has not been described until now. Here, we demonstrate that resting platelets show low surface expression of EMMPRIN, which is upregulated by various platelet stimulators (flow cytometry). EMMPRIN is located in the open canalicular system and in \u03b1 granules of platelets (according to electron microscopy and sucrose gradient ultracentrifugation). Platelet stimulation with recombinant EMMPRIN-Fc induced surface expression of CD40L and P-selectin (according to flow cytometry), suggesting that EMMPRIN-EMMPRIN interaction activates platelets. Coincubation of platelets with monocytes induced EMMPRIN-mediated nuclear factor \u03baB activation (according to Western blot) in monocytes with increased MMP-9 (zymography), interleukin-6, and tumor necrosis factor-\u03b1 secretion (according to ELISA) by monocytes. In conclusion, EMMPRIN displays a new platelet receptor that is upregulated on activated platelets. Binding of EMMPRIN to platelets fosters platelet degranulation. Platelet\u2013monocyte interactions via EMMPRIN stimulate nuclear factor \u03baB\u2013driven inflammatory pathways in monocytes, such as MMP and cytokine induction. Thus, EMMPRIN may represent a novel target to diminish the burden of protease activity and inflammation in atherosclerosis.<\/jats:p>","DOI":"10.1161\/circresaha.107.157990","type":"journal-article","created":{"date-parts":[[2007,11,29]],"date-time":"2007-11-29T21:14:12Z","timestamp":1196370852000},"page":"302-309","update-policy":"https:\/\/doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":137,"title":["Extracellular Matrix Metalloproteinase Inducer (CD147) Is a Novel Receptor on Platelets, Activates Platelets, and Augments Nuclear Factor \u03baB\u2013Dependent Inflammation in Monocytes"],"prefix":"10.1161","volume":"102","author":[{"given":"Roland","family":"Schmidt","sequence":"first","affiliation":[{"name":"From the Deutsches Herzzentrum and I. Medizinische Klinik (R.S., S.F., A.S.) and III. Medizinische Klinik (P.J.), Klinikum rechts der Isar, Technische Universita\u0308t Mu\u0308nchen, Germany; Corimmun GmbH (A.B., A.G., M.U.), Martinsried, Germany; Medizinisches Versorgungzentrum fu\u0308r Laboratoriumsmedizin Dr. Lo\u0308er, Dr. Treder, und Kollegen (P.C.), Muenster, Germany; Forschungszentrum fu\u0308r Umwelt und Gesundheit (A.W.), Oberschleissheim, Germany; Department of Internal Medicine (N.D.T.), Eccles Institute of..."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andreas","family":"Bu\u0308ltmann","sequence":"additional","affiliation":[{"name":"From the Deutsches Herzzentrum and I. Medizinische Klinik (R.S., S.F., A.S.) and III. Medizinische Klinik (P.J.), Klinikum rechts der Isar, Technische Universita\u0308t Mu\u0308nchen, Germany; Corimmun GmbH (A.B., A.G., M.U.), Martinsried, Germany; Medizinisches Versorgungzentrum fu\u0308r Laboratoriumsmedizin Dr. Lo\u0308er, Dr. Treder, und Kollegen (P.C.), Muenster, Germany; Forschungszentrum fu\u0308r Umwelt und Gesundheit (A.W.), Oberschleissheim, Germany; Department of Internal Medicine (N.D.T.), Eccles Institute of..."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sina","family":"Fischel","sequence":"additional","affiliation":[{"name":"From the Deutsches Herzzentrum and I. Medizinische Klinik (R.S., S.F., A.S.) and III. Medizinische Klinik (P.J.), Klinikum rechts der Isar, Technische Universita\u0308t Mu\u0308nchen, Germany; Corimmun GmbH (A.B., A.G., M.U.), Martinsried, Germany; Medizinisches Versorgungzentrum fu\u0308r Laboratoriumsmedizin Dr. Lo\u0308er, Dr. Treder, und Kollegen (P.C.), Muenster, Germany; Forschungszentrum fu\u0308r Umwelt und Gesundheit (A.W.), Oberschleissheim, Germany; Department of Internal Medicine (N.D.T.), Eccles Institute of..."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Angelika","family":"Gillitzer","sequence":"additional","affiliation":[{"name":"From the Deutsches Herzzentrum and I. Medizinische Klinik (R.S., S.F., A.S.) and III. Medizinische Klinik (P.J.), Klinikum rechts der Isar, Technische Universita\u0308t Mu\u0308nchen, Germany; Corimmun GmbH (A.B., A.G., M.U.), Martinsried, Germany; Medizinisches Versorgungzentrum fu\u0308r Laboratoriumsmedizin Dr. Lo\u0308er, Dr. Treder, und Kollegen (P.C.), Muenster, Germany; Forschungszentrum fu\u0308r Umwelt und Gesundheit (A.W.), Oberschleissheim, Germany; Department of Internal Medicine (N.D.T.), Eccles Institute of..."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paul","family":"Cullen","sequence":"additional","affiliation":[{"name":"From the Deutsches Herzzentrum and I. Medizinische Klinik (R.S., S.F., A.S.) and III. Medizinische Klinik (P.J.), Klinikum rechts der Isar, Technische Universita\u0308t Mu\u0308nchen, Germany; Corimmun GmbH (A.B., A.G., M.U.), Martinsried, Germany; Medizinisches Versorgungzentrum fu\u0308r Laboratoriumsmedizin Dr. Lo\u0308er, Dr. Treder, und Kollegen (P.C.), Muenster, Germany; Forschungszentrum fu\u0308r Umwelt und Gesundheit (A.W.), Oberschleissheim, Germany; Department of Internal Medicine (N.D.T.), Eccles Institute of..."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Axel","family":"Walch","sequence":"additional","affiliation":[{"name":"From the Deutsches Herzzentrum and I. Medizinische Klinik (R.S., S.F., A.S.) and III. Medizinische Klinik (P.J.), Klinikum rechts der Isar, Technische Universita\u0308t Mu\u0308nchen, Germany; Corimmun GmbH (A.B., A.G., M.U.), Martinsried, Germany; Medizinisches Versorgungzentrum fu\u0308r Laboratoriumsmedizin Dr. Lo\u0308er, Dr. Treder, und Kollegen (P.C.), Muenster, Germany; Forschungszentrum fu\u0308r Umwelt und Gesundheit (A.W.), Oberschleissheim, Germany; Department of Internal Medicine (N.D.T.), Eccles Institute of..."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Philipp","family":"Jost","sequence":"additional","affiliation":[{"name":"From the Deutsches Herzzentrum and I. Medizinische Klinik (R.S., S.F., A.S.) and III. Medizinische Klinik (P.J.), Klinikum rechts der Isar, Technische Universita\u0308t Mu\u0308nchen, Germany; Corimmun GmbH (A.B., A.G., M.U.), Martinsried, Germany; Medizinisches Versorgungzentrum fu\u0308r Laboratoriumsmedizin Dr. Lo\u0308er, Dr. Treder, und Kollegen (P.C.), Muenster, Germany; Forschungszentrum fu\u0308r Umwelt und Gesundheit (A.W.), Oberschleissheim, Germany; Department of Internal Medicine (N.D.T.), Eccles Institute of..."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martin","family":"Ungerer","sequence":"additional","affiliation":[{"name":"From the Deutsches Herzzentrum and I. Medizinische Klinik (R.S., S.F., A.S.) and III. Medizinische Klinik (P.J.), Klinikum rechts der Isar, Technische Universita\u0308t Mu\u0308nchen, Germany; Corimmun GmbH (A.B., A.G., M.U.), Martinsried, Germany; Medizinisches Versorgungzentrum fu\u0308r Laboratoriumsmedizin Dr. Lo\u0308er, Dr. Treder, und Kollegen (P.C.), Muenster, Germany; Forschungszentrum fu\u0308r Umwelt und Gesundheit (A.W.), Oberschleissheim, Germany; Department of Internal Medicine (N.D.T.), Eccles Institute of..."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Neal D.","family":"Tolley","sequence":"additional","affiliation":[{"name":"From the Deutsches Herzzentrum and I. Medizinische Klinik (R.S., S.F., A.S.) and III. Medizinische Klinik (P.J.), Klinikum rechts der Isar, Technische Universita\u0308t Mu\u0308nchen, Germany; Corimmun GmbH (A.B., A.G., M.U.), Martinsried, Germany; Medizinisches Versorgungzentrum fu\u0308r Laboratoriumsmedizin Dr. Lo\u0308er, Dr. Treder, und Kollegen (P.C.), Muenster, Germany; Forschungszentrum fu\u0308r Umwelt und Gesundheit (A.W.), Oberschleissheim, Germany; Department of Internal Medicine (N.D.T.), Eccles Institute of..."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephan","family":"Lindemann","sequence":"additional","affiliation":[{"name":"From the Deutsches Herzzentrum and I. Medizinische Klinik (R.S., S.F., A.S.) and III. Medizinische Klinik (P.J.), Klinikum rechts der Isar, Technische Universita\u0308t Mu\u0308nchen, Germany; Corimmun GmbH (A.B., A.G., M.U.), Martinsried, Germany; Medizinisches Versorgungzentrum fu\u0308r Laboratoriumsmedizin Dr. Lo\u0308er, Dr. Treder, und Kollegen (P.C.), Muenster, Germany; Forschungszentrum fu\u0308r Umwelt und Gesundheit (A.W.), Oberschleissheim, Germany; Department of Internal Medicine (N.D.T.), Eccles Institute of..."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Meinrad","family":"Gawaz","sequence":"additional","affiliation":[{"name":"From the Deutsches Herzzentrum and I. Medizinische Klinik (R.S., S.F., A.S.) and III. Medizinische Klinik (P.J.), Klinikum rechts der Isar, Technische Universita\u0308t Mu\u0308nchen, Germany; Corimmun GmbH (A.B., A.G., M.U.), Martinsried, Germany; Medizinisches Versorgungzentrum fu\u0308r Laboratoriumsmedizin Dr. Lo\u0308er, Dr. Treder, und Kollegen (P.C.), Muenster, Germany; Forschungszentrum fu\u0308r Umwelt und Gesundheit (A.W.), Oberschleissheim, Germany; Department of Internal Medicine (N.D.T.), Eccles Institute of..."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Albert","family":"Scho\u0308mig","sequence":"additional","affiliation":[{"name":"From the Deutsches Herzzentrum and I. Medizinische Klinik (R.S., S.F., A.S.) and III. Medizinische Klinik (P.J.), Klinikum rechts der Isar, Technische Universita\u0308t Mu\u0308nchen, Germany; Corimmun GmbH (A.B., A.G., M.U.), Martinsried, Germany; Medizinisches Versorgungzentrum fu\u0308r Laboratoriumsmedizin Dr. Lo\u0308er, Dr. Treder, und Kollegen (P.C.), Muenster, Germany; Forschungszentrum fu\u0308r Umwelt und Gesundheit (A.W.), Oberschleissheim, Germany; Department of Internal Medicine (N.D.T.), Eccles Institute of..."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andreas E.","family":"May","sequence":"additional","affiliation":[{"name":"From the Deutsches Herzzentrum and I. Medizinische Klinik (R.S., S.F., A.S.) and III. 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