RESUMEN
Objective:Previous genome-wide microarray analysis found TTCATTCT motif(DNA binding site of Runx1)in the RPL4 promoter of childhood leukemia cells,suggesting that Runx1 may regulate the expression of RPL4.This study is to investigate the relationship between Runx1 and RPL4 so as to better understand the effects of Runx1 on RPL4gene transcription,laying a foundation for further studying leukemogenesis of childhood leukemia.Methods:The luciferase plasmids containing RPL4 promoter and its mutant were constructed and were co-transfected into 293T cells with the expression plasmid of Runx1.The transactivity of RPL4 promoter was assayed by luminometer.Results:Runx1 significantly decreased the transcriptional activity of RPL4 promoter(P0.05).Conclusion:Runx1 can inhibit RPL4 gene transcription in a dose-dependent manner through binding to the TTCATTCT motif.