The role of microRNA-34a in BACH1، PTEN and SIRT1 expression in T-cell acute lymphoblastic leukemia cell line (Jurkat)

T-cell acute lymphoblastic leukemia is a lymphoid malignancy affected by oncogenic transformation of immature T-cell progenitors. Recently, it has been reported that microRNAs play a role in various leukemias including T-ALL. The aberrant expression of these microRNAs in proliferation, invasion, and apoptosis has been reported through targeting signaling pathways. miR-34a is a tumor suppressor in many cancers, including T-ALL.

In this experimental study, Jurkat T-cell acute lymphoblastic leukemia (T-ALL) cells were maintained in RPMI 1640. miR-34a mimic was transfected using jetPEI in vitro DNA transfection reagent. RNA extraction and cDNA synthesis were performed after 24 h. Expression of miR-34a and BACH1, PTEN and SIRT1 genes were examined using qRT-PCR.

qRT-PCR analyses showed that in Jurkat cells after transfection with miR-34a mimic the expression of BACH1 and SIRT1 genes were reduced and the expression of PTEN was increased.

Low expression level of miR-34a in associated with metastasis and tumor invasion in different cancers. In current study, our results showed that the expression levels of BACH1 and SIRT1 genes which are oncogenes reduced and the expression levels of PTEN which is tumor suppressor increased after the transfection with miR-34a.