7334
However, we report in vitro experimental studies in which IL-10 primed leukocytes and led to an enhanced production of tumor necrosis factor ( TNF ) upon further stimulation by lipopolysaccharide ( LPS ).
 ( protein: TNF, None) , ( protein: tumor necrosis factor, None) , ( cell line: IL-10 primed leukocytes, None) , ( protein: IL-10, 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: TNF, None) , ( protein: tumor necrosis factor, None) , ( cell line: IL-10 primed leukocytes, None) , ( protein: IL-10, None) 