Figure 1.

Expression of miR-155 is increased in tamoxifen resistant breast cancer cells. A. Total RNA was isolated from tamoxifen sensitive breast cancer cells (MCF-7 or SKBR3) and tamoxifen resistant cells (MCF-7/TAM and SKBR3/TAM). RNA was analyzed by real time RT-PCR for miR-155 levels. B. Total RNA was isolated from breast cancer samples from the patients with tamoxifen sensitive and resistance. RNA was analyzed by real time RT-PCR. Data represents the mean ± SE of triplicate samples. **P<0.01.