Sensitization effect of insulin of chemotherapy on human adenocarcinoma cells A549 / 解放军医学杂志

ABSTRACT

Objective To explore the sensitization effect of insulin to chemotherapy as a metabolic promoter on human lung adenocarcinoma cells A549.Methods The sensitivity of human adenocarcinoma cells A549 to DDP was observed by MTT methods,and IC30 values of the cells were calculated.The optimal concentration of insulin to promoting A549 cells' growth was determined by MTT assay.The A549 cells were pretreated with insulin of various concentrations for different time period,and then the cell sensitivity to DDP was evaluated with MTT assay.Flow cytometry was used to study the cell cycle distribution of the A549 cells treated with insulin.Results The IC30 value of DDP was about 36.87?g/ml.It was found that the cell growth was significantly promoted with pretreatment of insulin at the concentration of 4~16mU/ml for 8~16 hours.Insulin enhanced the inhibitory effect of DDP(36.87?g/ml)on cell proliferation when human lung adenocarcinoma cells A549 were treated with insulin(2.0~16.0mU/ml;8~16h)as indicated by MTT assay(P