EGCG and Q in combination with Doc enhanced the inhibition of tumor cell invasion. LAPC-4-AI (A) and PC-3 (B) cells were treated with vehicle control, 40μM EGCG+5μM Q, 5nM Doc or EGCG+Q+Doc at same concentrations for 48h. The cells were starved in serum-free medium overnight. Then the cells were seeded on the upper membrane of transwell chamber which was pre-coated with Matrigel. Complete growth medium was added to the bottom. After 20h incubation, cells on the lower membrane of chambers were stained and counted. Data are presented as mean ± SD. NT: non-treatment, DMSO control; Q: quercetin; Doc: docetaxel. * Compared to NT or Doc treatment, P<0.05.