XYLOGLUCAN CONJUGATED FUNCTIONALIZED GRAPHENE OXIDE AS A NANO CARRIER SYSTEM FOR pH RESPONSIVE TARGETED DRUG DELIVERY OF FUCOIDAN
Keywords:Graphene oxide, Chitosan, Xyloglucan, Fucoidan, pH-responsive, Hemocompatibilty
Objective: Marine polysaccharides are materializing in the field of biomedicine owing to its promising properties, including high biocompatibility, excellent biodegradability, nontoxic nature, abundance and low cost. Fucoidan (FU), a sulphated marine polysaccharide extracted from brown seaweed, shows a promising application prospect as an anticancer model drug. In order to enhance the stability, biocompatibility and drug loading capacity, xyloglucan was chosen as a targeting ligand, conjugated onto the surface of chitosan functionalized graphene oxide for targeted delivery of fucoidan.
Methods: Firstly, Graphene oxide (GO) was prepared by modified Hummer’s method and functionalized with chitosan (CS) via amidation process, further conjugated with xyloglucan (XG). The resulting conjugate, GO-CS-XG, was used to deliver fucoidan through a nanocarrier drug delivery method. The developed GO-CS-XG-FU nanosystem was analyzed for its physiochemical characterization, morphology, hemolytic activity, anti-inflammatory and anticancer activity.
Results: The FU loading efficiency and capacity were 75.7% and 83.4%, respectively. XG ligands on the nanoparticle may lead the nanoparticles to actively target cancer cells. Hemolytic activity of the FU-loaded GO-CS-XG nanosystem shows negligible activity, thus making it a potential candidate for biomedical applications. In vitro drug release analysis of FU from GO-CS-XG was lesser at physiological pH but under acidic conditions, it was significantly increased. Results of in vitro cell viability studies indicate that the efficiency of fucoidan was improved upon conjugation with the nanosystem (GO-CS-XG) against human histiocytic lymphoma (U 937) cell line.
Conclusion: As a result, we propose a new multifunctional graphene-based targeted platform by using xyloglucan polysaccharide as targeting nanomaterial for pH-responsive anticancer drug delivery with high efficacy.
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