Effect of ascorbic acid combined with arsenic trioxide on apoptosis and differentiation in myelocytic leukemia cell lines / 中国地方病学杂志

Objective To investigate the effects of arsenic trioxide(As2O3)combined with ascorbic acid(AA) on the apoptosis and differentiation of myelocytic leukaemia cells.Methods The acute promyelecytic leukaemia cell lines (NB4 and MR2)and erythroleukemia cell line(KS62)were cultured in vitro.Grouping wasbased on different concentration of As2O3(0,0.1,0.2,0.5,1.0 μmol/L),which WaS used a8 control groups.Then,AA(113.0μmol/)was added into each group.Cell morphologic changes of cell lines NB4,MR2 and K562 were observed under light microscope;The apoptosis symbols [Annexin V(+)/PI(-),Annexin V(+)/PI(+)]and differentiation symbols(CD11b and CD33)were detected by flow cytometry 96 hours later.Results