GA down-regulates the expression of genes involved in Doc sensitivity. The mRNA expression of genes involved in Doc sensitivity, including β-tubulin III, tau and survivin, in BGC-823 cells was determined by qRT-PCR after 48 h of GA (0.25 μM) treatment. The mRNA expression of target genes was normalized to a control. *P < 0.01 compared with control. Data were quantified from three independent experiments.