13860
Thus, PPARgamma is present in macrophages in human atherosclerotic lesions and may regulate expression and activity of MMP-9 , an enzyme implicated in plaque rupture .
 PPARgamma, macrophages, MMP-9
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 PPARgamma, macrophages, MMP-9