ABCB1 and breast cancer: Polymer-lipid hybrid nanoparticle with Doxorubicin and chemosensitizer (GG918) or their combination revealed high Doxorubicin uptake in human MDR breast cancer cell line (MDA435/LCC6/MDR1) compared to co-administration of two single-agent/s loaded hybrid nanoparticles (Wong et al., 2006).