8929
We investigated the mechanism by which DPEP inhibits NO and PGE ( 2 ) by examining the level of nuclear factor - kappa B ( NF - kappa B ) activation within the mitogen - activated protein kinase ( MAPK ) pathway , which is an inflammation - induced signaling pathway in RAW 264 . 7 cells .
 Chemical: DPEP; Chemical: NO; Chemical: PGE ( 2 )
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: DPEP; Chemical: NO; Chemical: PGE ( 2 )