Effect of miR-26a on drug resistance of chronic lymphocytic leukemia cells by regulating PTEN gene

Objective To observe the regulation of microRNA-26a (miR-26a) on the drug resistance of chronic lymphocyte leukemia (CLL) cells through the phosphatase and tensin homolog deleted on chromosome ten (PTEN). Methods The experiment was divided into 4 groups: control group (L1210 cells), resistance group (L1210/DDP cells), NC group (transfected with empty plasmid+L1210/DDP cells), inhibitor group (transfected with miR-26a-inhibitor plasmid+L1210/DDP and inhibitor group (transfected with miR-26a-inhibitor plasmid+L1210/DDP cells). miR-26a and PTEN mRNA expression were detected by RT-qPCR. Dual luciferase experiment was used to detect the targeting of miR-26a to PTEN. MTT method was used to detect cell resistance to cisplatin (DDP). Flow cytometry was used to detect cell apoptosis rates. Western blot was used to detect of PTEN, phosphatidyl inositol-3-kinase (PI3K), serine-threonine protein kinase (AKT) protein expressions in cells. Results miR-26a inhibited the expression of PTEN in cells (P＜0.05). miR-26a targeted