- Designing Two-Dimensional Nanosheets for Improving Drug Delivery to Fucose-Receptor-Overexpressing Cancer Cells
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Targeted drug delivery has shown promise in improving the therapeutic efficacy of anticancer drugs. Gemcitabine hydrochloride (GEM) is a broad-range chemotherapeutic agent for the treatment of various cancers. However, systemic use of free GEM is restricted because of its poor physicochemical properties and nonspecific drug delivery, resulting in dose-dependent adverse effects. In this study, a fucose-conjugated graphene oxide (GO)-based smart targeted nanocarrier system was designed to provide high loading, sustained release, and targeted high concentrations of GEM to cancer cells. Fucose-conjugated GO nanosheets (FGONS) and GEM-loaded fucose-conjugated GO nanosheets (GEM-FGONS) were prepared and characterized by various techniques. About 36.2 % of GEM was loaded to the FGONS, which showed a pH-dependent release over a period of 48 h. A colloidal suspension of GEM-FGONS was found to be physiochemically stable for up to 96 h. In cytotoxicity studies, GEM-FGONS demonstrated time- and dose-dependent high toxicities on fucose-receptor-overexpressing MDA-MB-231 human breast cancer cells and A549 human lung cancer cells. Moreover, targeted formulations were more efficacious than non-targeted or free GEM. Overall, bioconjugation of fucose helps in the stabilizing and targeting of graphene oxide nanosheets.
- Gupta, Nitin,Jangid, Ashok Kumar,Singh, Mandeep,Pooja, Deep,Kulhari, Hitesh
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- PURIFICATION AND KINETIC STUDIES OF AN α-L-FUCOSIDASE OF VENUS MERCENARIA
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An α-L-fucosidase activity has been isolated from the liver (hepatopancreas) of the common edible clam, Venus mercenaria, and has been purified approximately 300-fold (11percent yield) by affinity chromatography on agarose-ε-amino-caproylfucosamine.Isoele
- Presper, Kathleen A.,Concha-Slebe, Irina,De, Tripti,Basu, Subhash
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