9156
Indomethacin blocked PGE2 release, but had no influence on the observed effects of C3a , suggesting that the effects of C3a on IL-6 production are independent of PGE2 formation by monocytes .
 ( protein: IL-6, None) , ( protein: C3a, None) , ( protein: C3a, None) , ( cell type: monocytes, 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: IL-6, None) , ( protein: C3a, None) , ( protein: C3a, None) , ( cell type: monocytes, None) 