A Novel Graphene Quantum Dot-Based mRNA Delivery Platform.

Area of Science:

• Biotechnology
• Nanomedicine
• Molecular Biology

Background:

• Therapeutic messenger RNA (mRNA) requires effective delivery systems to overcome cell membrane barriers and degradation.
• Current drug delivery systems face challenges with cellular uptake and potential toxicity.
• Graphene quantum dots (GQDs) are emerging as versatile nanomaterials for biomedical applications.

Purpose of the Study:

• To develop and evaluate a novel mRNA delivery system using functionalized graphene quantum dots (GQDs).
• To assess the efficacy and safety of GQD-based mRNA delivery in hepatocarcinoma cells.
• To establish a stable, manufacturable, and effective platform for mRNA therapeutics.

Main Methods:

• Synthesis of polyethyleneimine (PEI)-functionalized graphene quantum dots (GQDs).
• Complexation of mRNA with functionalized GQDs.
• In vitro delivery of mRNA-GQD complexes to Huh-7 hepatocarcinoma cells.
• Assessment of mRNA integrity, cellular uptake, functionality, and cytotoxicity.

Main Results:

• Functionalized GQDs successfully delivered intact and functional mRNA to Huh-7 cells at low doses.
• The GQD-based delivery system demonstrated minimal toxicity in the studied cell lines.
• The synthesized GQD-PEI complexes were stable and easy to manufacture.
• Cellular toxicity, a known issue with first-generation particles, was observed but manageable.

Conclusions:

• Polyethyleneimine-functionalized graphene quantum dots represent a promising novel system for therapeutic mRNA delivery.
• This GQD-based system offers advantages in terms of stability, manufacturability, and effectiveness.
• Further development of GQD-based delivery systems could overcome current limitations in mRNA-based therapies.