CdSe/ZnS-MPA and CdSe/ZnS-GSH quantum dots have been evaluated for their ability to interact with P-gp, showing that they efficiently downregulated its expression in A549 cells, while upregulated miR-34b and miR-185, contributing to reveal their important modulatory function and possible future use as targets for cancer therapy[62]. Here, PGP is linked to cancer.