Journal
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
Volume 81, Issue -, Pages 478-484Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.msec.2017.08.036
Keywords
pH-responsive; Redox-responsive; Targeted delivery; Mesoporous silica nanoparticles; Hyaluronic acid
Categories
Funding
- National Natural Science Foundation of China [81402563]
- Traditional Chinese Medicine Bureau Foundation of Guangdong Province [20141158]
- Special Foundation for Young Innovation Scientists of Department of Education of Guangdong Province [2014KQNCX097, 2014KQNCX098]
- Training Plan for Outstanding Young Teachers in Higher Education Institutions of Guangdong Province [YQ2015083]
- Student Innovation Training Program [4CX16048G]
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In this work, we developed a drug-conjugated nanocarrier with zero premature release property for actively targeted drug delivery. The pH and redox dual-responsive nanocarrier was fabricated based on hyaluronic acid (HA) modified the mesoporous silica nanoparticles (MSNs). Doxorubicin (DOX) was conjugated to MSNs via hydrazone bonds, which can be cleaved in tumor tissue (acidic conditions). To improve specific cellular uptake and stability of nanocarriers, HA was equipped with an outer shell on the nanoparticle surface via a disulfide crosslinker. Stimulus-induced release of the DOX was studied in the different pH and GSH, which showed the embedded DOX can be controlled release from MSN channels. The dual-triggered drug release system provides an efficient targeted drug delivery system into the cytosol of cancer cells. The results of flow cytometry and confocal laser scanning microscopy (CLSM) showed that the HA-functionalized DOX-conjugated nanoparticles presented much better cellular uptake and higher cytotoxicity to tumor cells. This drug delivery system has great potential for tumor-trigged drug release for cancer therapy.
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