Controlled release of drug from folate-decorated and graphene mediated drug delivery system: Synthesis, loading efficiency, and drug release response

Abstract A novel folate-decorated and graphene mediated drug delivery system was prepared that involves uniquely combining graphene oxide (GO) with anticancer drug for controlled drug release. The nanocarrier system was synthesized by attaching doxorubicin (DOX) to graphene oxide via strong π–π stacking interaction, followed by encapsulation of graphene oxide with folic acid conjugated chitosan. The π–π stacking interaction, simplified as a non-covalent type of functionalization, enables high drug loading and subsequent controlled release of the drug. The encapsulated graphene oxide enhanced the stability of the nanocarrier system in aqueous medium because of the hydrophilicity and cationic nature of chitosan. The loading and release of DOX indicated strong pH dependence and imply hydrogen-bonding interaction between graphene oxide and DOX. The proposed strategy is advantageous in terms of targeted drug delivery and has high potential to address the current challenges in drug delivery. Thus, the prepared nanohybrid system offers a novel formulation that combines the unique properties of a biodegradable material, chitosan, and graphene oxide for biomedical applications.

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