13851
Mononuclear phagocytes play an important role in atherosclerosis and its sequela plaque rupture in part by their secretion of matrix metalloproteinases ( MMPs ), including MMP-9 .
 ( protein: MMPs, None) , ( cell type: Mononuclear phagocytes, None) , ( protein: matrix metalloproteinases, None) , ( protein: MMP-9, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: MMPs, None) , ( cell type: Mononuclear phagocytes, None) , ( protein: matrix metalloproteinases, None) , ( protein: MMP-9, None) 