Fig. 3From: Endoplasmic reticulum stress: major player in size-dependent inhibition of P-glycoprotein by silver nanoparticles in multidrug-resistant breast cancer cellsTreatment with 75 nm AgNPs sensitizes drug-resistant MCF-7/KCR cells to doxorubicin-induced apoptosis. a Cytotoxicity of doxorubicin and of doxorubicin and 75 nm AgNP combination in MCF-7/KCR cells. b Representative dot plots of AnnexinV/PI staining, and c number of apoptotic drug-resistant cancer cells following 75 nm AgNP and/or doxorubicin treatment or verapamil administration. The values are the means ± standard deviations of three independent experiments (*P < 0.03 ****P < 0.0001, Fisher’s LSD test)Back to article page