Galactosylated Chitosan Modified Magnetic Mesoporous Silica Nanoparticles Loaded with Nedaplatin for the Targeted Chemo-Photothermal Synergistic Therapy of Cancer.

The use of chemotherapy combined with photothermal therapy (PTT) is getting a focus topic for cancer treatment. Duing this research, the double targeting drug delivery system of nedaplatin (NDP)-carboxyl-functionalized magnetic mesoporous silica (MMSN-COOH)-galactosylated chitosan (GC) nanoparticles (NPs) was constructed. Because MMSNs have special physical properties, it can target to the specific area. In addition, it's able to convert absorbed near-infrared (NIR) light into heat energy for photothermal therapy (PTT). Furthermore, the thermal energy generated by MMSNs under NIR lasers can accelerate the release of drug from preparations. Moreover, GC modified MMSNs-COOH as a carrier can increase the drug uptake of cancer cells that highly express galectins in vitro, resulting in cancer cell apoptosis, and thus increasing the targeting of cancerous tissue in vivo. The experimental consequences in vitro and in vivo revealed that the NDP@MMSNCOOH-GC NPs combined with PTT could avoid systemic toxicity and improve biosecurity while having good anticancer effect.