Controlled drug release with surface-capped mesoporous silica nanoparticles and its label-free in situ Raman monitoring.
Mesoporous silica nanoparticles (MSNs) have drawn attention as efficient nanocarriers for drug delivery systems owing to their unique physiochemical properties. However, systemically controlling the kinetics of drug release from the nanocarriers and in situ monitoring of the drug release are still challenging. Here, we report surface-capped MSNs used for controlled drug release and demonstrate label-free in situ Raman monitoring of released drugs based on the molecule-specific spectral fingerprints. By capping the surface of MSNs with amine moieties, gold nanoparticles, and albumin, we achieved high loading efficiencies (up to 97%) of doxorubicin and precisely controlled drug release stimulated by changing pH value. Moreover, we monitored in real-time drug release profile and visualized cellular distribution of the delivered drug at nanoscale based on its intrinsic Raman peak. Finally, we evaluated drug responses in cancer cells and normal cells to investigate whether capped-dMSNs exhibit selective drug release. Our findings would be beneficial for designing smart drug carriers and directly monitoring the release behavior of drugs in actual cellular environments.
['Lee|Seungki|S|', 'Kwon|Jung A|JA|', 'Park|Keon Hee|KH|', 'Jin|Chang Min|CM|', 'Joo|Ji Bong|JB|', 'Choi|Inhee|I|']
D000418:Albumins D000588:Amines D000903:Antibiotics, Antineoplastic D045744:Cell Line, Tumor D003692:Delayed-Action Preparations D004317:Doxorubicin D004337:Drug Carriers D004339:Drug Compounding D006046:Gold D057809:HEK293 Cells D006801:Humans D006863:Hydrogen-Ion Concentration D053768:Metal Nanoparticles D053758:Nanoparticles D016062:Porosity D012822:Silicon Dioxide D013059:Spectrum Analysis, Raman
Mesoporous silica nanoparticles Drug delivery Controlled release Raman mapping Raman spectroscopy