Orthogonal adsorption onto nano-graphene oxide using different intermolecular forces for multiplexed delivery

Area of Science:

• Materials Science
• Nanotechnology
• Biomedical Engineering

Background:

• Graphene oxide (GO) is a promising nanomaterial for drug delivery due to its large surface area and tunable properties.
• Developing efficient co-delivery systems for multiple therapeutic agents remains a challenge in cancer treatment.
• Understanding the interaction between nanomaterials and different types of drug carriers is crucial for effective delivery.

Purpose of the Study:

• To investigate the co-adsorption capacity of nano-graphene oxide (NGO) for doxorubicin and zwitterionic dioleoyl-sn-glycero-3-phosphocholine (DOPC) liposomes.
• To explore the underlying mechanisms of adsorption based on surface and intermolecular forces.
• To evaluate the potential of NGO as a stable platform for co-delivery of these agents to cancer cells.

Main Methods:

• Characterization of nano-graphene oxide.
• Adsorption studies of doxorubicin and DOPC liposomes onto NGO.
• Analysis of surface and intermolecular forces governing adsorption.
• Assessment of colloidal stability of the resulting complexes.
• In vitro evaluation of co-delivery to cancer cells.

Main Results:

• NGO demonstrated high adsorption capacities for both doxorubicin and DOPC liposomes.
• Adsorption occurred in an orthogonal and non-competing manner, attributed to the heterogeneous surface of NGO.
• Stable colloidal systems were formed, facilitating the co-delivery of both cargos.
• The distinct binding mechanisms allowed for efficient loading of both therapeutic agents.

Conclusions:

• Nano-graphene oxide serves as an effective platform for the orthogonal co-delivery of doxorubicin and liposomes.
• The unique surface chemistry of NGO enables simultaneous adsorption of diverse molecules.
• This co-delivery system holds significant potential for enhanced cancer therapy by delivering multiple agents concurrently.