2271
Inhibition of cytokine production by PBMC was observed also when other inducers were used ( staphylococci , silica , zymosan ).
 ( protein: cytokine, 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:
 ( protein: cytokine, None) , ( cell type: PBMC, None) 