microRNA-181a enhances cell proliferation in acute lymphoblastic leukemia by targeting EGR1

Leukemia Research
Lorena VerduciGiuseppe Macino

Abstract

Acute lymphoblastic leukemia (ALL) is an aggressive cancer that occurs in both children and adults. Starting from an integrated analysis of miRNA/mRNA expression profiles in 20 ALL patients, we identify a negative correlation between miR-181a and EGR1. Coherently, miR-181a over-expression in Jurkat T-ALL cells decreases EGR1 expression, increasing cell proliferation and enhancing the cell-cycle progression from G1 to S phase. We show that EGR1 is a new direct target of miR-181a. Our findings suggest that miR-181a behaves as an onco-miRNA in ALL by down-regulating EGR1.

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