5345
The work reported here resolves, at the level of gene regulation, the controversy as to whether or not human monocytes /macrophages can produce nitric oxide ( NO ) when stimulated with lipopolysaccharide ( LPS ), with or without co-stimulation by interferon-gamma ( IFN-gamma ).
 ( protein: IFN-gamma, None) , ( cell type: human monocytes /macrophages, 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: IFN-gamma, None) , ( cell type: human monocytes /macrophages, None) , ( cell type: monocytes, None) 