Gene expression spectra in human leukemia HL-60 cells treated with EGCG

To decipher the molecular mechanism of EGCG induced HL-60 cell apoptosis, alterations of gene expression spectra in HL-60 cell line cells after treatment with EGCG were screened by cDNA chip, and analyzed with the GenePix 3.0 twice; and the cDNA chip results further identified by RT-PCR. Ninety-seven genes among the total 8398 (1.15%) showed consistent significant differential expression in the duplicated cDNA chip assessments. Thirty-nine genes (40.2%) were up-regulated and 58 genes (59.8%) were down-regulated; and the randomly selected four performed RT-PCR results agreed with the cDNA chip data. The results suggest that the apoptosis of HL-60 cells induced by EGCG is a progressive transformation process regulated by a variety of genes.