Screening for methylation-silenced genes in acute myeloid leukemia HL-60 cell line by a quantitative proteomic approach.

Abstract

To screen for new methylation association genes in HL-60 to reveal the pathogenesis of leukemia, and provide important theoretical and scientific basis for the prevention and cure of leukemia. Two-dimensional fluorescence difference gel electrophoresis (F-2D-DIGE) was performed to separate the total proteins from acute myelogenous leukemia (AML) cell line HL-60 cells with or without 5-aza-2-deoxycytidine (5-aza-2-dC) treatment. Imaging software Decyder 6.5 and PDQuest were used to detect the differential expression protein spots, and matrix-assisted laser desorption/ionizaion time-of-flight mas spectrometer (MALDI-TOF MS) was adopted to identify the differential expression proteins. F-2D-DIGE maps of 5-aza-2-dC-untreated HL-60 and-treated HL-60 cells were established. A total of 53 differential protein spots were detected, and 35 differential proteins were successfully identified. Of the identified proteins, 32 proteins were up-regulated, and 3 proteins were down-regulated in HL-60 cells after 5-aza-2-dC treatment. Thirty-five differential proteins may be associated with methylation in HL-60 cell line, which provides the important clues for epigenetic study of leukemia.