5989
In human THP-1 monocytic leukemia cells cultured with RA (0.05 to 500 nmol/L), MCP-1 expression was induced rapidly, significantly, and dose-dependently by as much as 165-fold.
 ( cell line: human THP-1 monocytic leukemia cells, None) , ( protein: MCP-1, 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: human THP-1 monocytic leukemia cells, None) , ( protein: MCP-1, None) 