tokens: 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 .
folded_tokens: 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 .
labels: B-other_organic_compound I-other_organic_compound O O B-cell_line I-cell_line I-cell_line I-cell_line O O O O B-RNA_molecule I-RNA_molecule O O O O O O O O O B-other_name I-other_name O O O O