2616
Similar to Mono Mac 6 cells , primary blood monocytes , when precultured with a low dose of LPS , also become tolerant and produce little TNF after LPS stimulation .
 ( cell type: primary blood monocytes, None) , ( cell line: Mono Mac 6 cells, None) , ( protein: TNF, 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: primary blood monocytes, None) , ( cell line: Mono Mac 6 cells, None) , ( protein: TNF, None) 