Objective To evaluatethe effect of mTORC1 inhibitor on the proliferation in human pancreatic neuroendocrine tumors(pNET)cell line BON,to explore the function of glutamine metabolism in it.Methods In vitro cultured human pancreatic neuroendocrine tumors(pNET)cell line BON,BON cells were treated with different concentrations of rapamycin(1,5,10,25,50, 100 nM)for 12,24 h.Then CCK-8 assay are used to calculate the growth inhibitory rate.Rapamycin treated with BON 12 h,test the glutamine uptake level compared with control.Then deprive of glucose and/or glutamine,CCK-8 assay were used in observation of cell proliferation,cell cycle distribution was analyzed by flow cytomety.Results Rapamycin significantly inhibited the growth of BON cells in a time-and dose-dependent manner(P <0.05).Meanwhile,rapamycin can reduce the glutamine uptake level compared with control.BON obviously depends on glutamine for growth,without glucose and glutamine group have obvious difference in growth rate(P <0.05).Conclusion mTORC1 inhibitor can inhibit BON cells proliferation and influence the glutamine uptake lev-el.suggesting that mTORC1 inhibitor might inhibit BON cells proliferation by influenced the glutamine metabolic pathway.