12281
These results provide evidence that promonocytic THP-1 cells require prestimulation in order to activate HUVEC and that TNF alpha contributes to this phenomenon.
 ( cell line: promonocytic THP-1 cells, None) , ( protein: TNF alpha, None) , ( cell type: HUVEC, 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 line: promonocytic THP-1 cells, None) , ( protein: TNF alpha, None) , ( cell type: HUVEC, None) 