10563
Retinoic acid treatment of HL60 promyelocytic leukemia cells for 24 hr induced C/EBPepsilon mRNA levels by 4-fold, while prolonged treatment gradually reduced mRNA expression to pretreatment levels.
 ( RNA: C/EBPepsilon mRNA, None) , ( cell line: HL60 promyelocytic leukemia cells, 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:
 ( RNA: C/EBPepsilon mRNA, None) , ( cell line: HL60 promyelocytic leukemia cells, None) 