9155
Since C3a has been shown to induce PGE2 production by monocytes , and PGE2 has been shown to influence cytokine production, we investigated the potential role of PGE2 in C3a -mediated enhancement of LPS- and IL-1beta- induced IL-6 production .
 ( protein: C3a, None) , ( cell type: monocytes, None) , ( protein: C3a, 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: C3a, None) , ( cell type: monocytes, None) , ( protein: C3a, None) 