3184
Furthermore , immunohistochemistry studies showed that Rs - LPS inhibited the expression of interleukin 6 and matrix metalloproteinase - 9 and reduced the content of monocytes and macrophages in atherosclerotic plaques .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None