Abstract

Molybdenum disulfide (MoS 2 ), one representative 2D nanomaterial, has recently emerged as a unique platform in the biomedical field. However, its application in drug delivery systems should be further exploited. Here, we report a novel tumor cell targeting and lysosomal acidic environment/NIR laser dual responsive drug delivery system for synergetic chemo-photothermal treatment of cancer cells. The MoS 2 nanosheets were loaded with chemotherapy drug doxorubicin (DOX) and coated with polydopamine (PDA) layer. Then, thiolated aptamer AS1411 and polyethylene glycol (PEG) were modified onto MoS 2 nanosheets through Michael addition reaction to construct [email protected] 2 nanosheets. The aptamer modification endowed the nanoplatform with targeting ability to breast cancer MCF-7 cells. MoS 2 and PDA converted 808 nm NIR laser into heat and played the role of photothermal therapy (PTT). Tumor lysosomal acidic environment and NIR laser irradiation accelerated the release of DOX from the nanosheets. The nanocarrier Apt-PEG-PDA-MoS 2 showed good biocompatibility, and [email protected] 2 showed synergetic chemo-photothermal therapy effects with significantly enhanced anti-tumor efficacy, suggesting that this MoS 2 -based drug delivery platform is promising for targeted and synergetic treatment of cancer.