Dual drug-loaded halloysite hybrid-based glycocluster for sustained release of hydrophobic moleculesElectronic supplementary information (ESI) available: Experimental details, FT-IR spectra, TGA curves, cell viability. See DOI: 10.1039/c6ra14657k

A dual drug-loaded HNT-CD glycocluster delivery system based on halloysite nanotubes and carbohydrate functionalized cyclodextrin was developed by a green protocol using solvent-free microwave irradiation. The nanohybrid was employed for concurrent load and release of silibinin and curcumin. The new...

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Main Authors: Massaro, M, Riela, S, Baiamonte, C, Blanco, J. L. J, Giordano, C, Lo Meo, P, Milioto, S, Noto, R, Parisi, F, Pizzolanti, G, Lazzara, G
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Summary:A dual drug-loaded HNT-CD glycocluster delivery system based on halloysite nanotubes and carbohydrate functionalized cyclodextrin was developed by a green protocol using solvent-free microwave irradiation. The nanohybrid was employed for concurrent load and release of silibinin and curcumin. The new delivery system was characterized by means of TGA, FT-IR spectroscopy, SEM and DLS. These techniques confirm the successful loading of the two drugs in the system. SEM and DLS measurements highlighted that the nanomaterial preserves a tubular structure with an average hydrodynamic radius of ca. 200 nm. The release of the drugs from the HNT glycocluster was investigated by means of UV-vis spectroscopy at two different pH values simulanting the typical physiological conditions of either gastric or intestinal fluids. Enzyme-linked lectin assays (ELLA) demonstrated that highly mannoside-cyclodextrins HNT entities display high affinity towards mannose selective ConA lectin. Biological assays showed that the new drug delivery system exhibits anti-proliferative activity against the investigated cell lines. Fluorescence microscopy confirmed ELLA results and it showed a high propensity of this drug delivery system to cross cell membranes and to penetrate into the cell nucleus. The results revealed that the synthesized multicavity system is a material of suitable size and nanoarchitecture to transport drugs into living cells. A dual drug-loaded HNT-CD glycocluster delivery system based on halloysite nanotubes and carbohydrate functionalized cyclodextrin for delivery of natural drugs was developed.
ISSN:2046-2069
DOI:10.1039/c6ra14657k