6520
C5a , a potent peptide chemoattractant , stimulates interleukin-8 ( IL-8 ) secretion from peripheral blood mononuclear cells ( PBMC ).
 ( cell type: mononuclear cells, None) , ( cell type: peripheral blood mononuclear cells, None) , ( protein: interleukin-8, None) , ( protein: IL-8, None) , ( cell type: PBMC, 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:
 ( cell type: mononuclear cells, None) , ( cell type: peripheral blood mononuclear cells, None) , ( protein: interleukin-8, None) , ( protein: IL-8, None) , ( cell type: PBMC, None) 