Polymer-functionalized nanodiamond platforms as vehicles for gene delivery

Area of Science:

• Biotechnology
• Nanomedicine
• Gene Therapy

Background:

• Gene therapy shows potential for treating various diseases but is limited by the lack of effective and safe delivery methods.
• High molecular weight polyethyleneimine (PEI25K) offers high transfection efficiency but also high cytotoxicity, hindering its therapeutic application.
• Functional nanodiamonds (NDs) are emerging as promising next-generation therapeutic carriers.

Purpose of the Study:

• To develop and evaluate nanodiamonds (NDs) as efficient and safe vectors for in vitro gene delivery.
• To create a hybrid ND-PEI800 material combining high transfection efficiency with reduced cytotoxicity.
• To establish a scalable and broadly applicable gene therapy strategy using functionalized NDs.

Main Methods:

• Surface-immobilization of 800 Da polyethyleneimine (PEI800) onto nanodiamonds (NDs) via covalent conjugation with amine groups.
• In vitro assessment of gene delivery efficiency and cytotoxicity of the developed ND-PEI800 hybrid material.
• Comparative analysis of the hybrid material against unmodified NDs and PEI800 alone.

Main Results:

• PEI800-modified NDs demonstrated high gene transfection efficiency, comparable to high molecular weight PEI (PEI25K).
• The developed ND-PEI800 hybrid material exhibited significantly lower cytotoxicity compared to PEI25K.
• Enhanced gene delivery properties were exclusively attributed to the synergistic effect of the hybrid ND-PEI800 material.

Conclusions:

• Nanodiamonds functionalized with PEI800 represent a promising platform for safe and efficient gene delivery.
• This hybrid material overcomes the limitations of traditional PEI-based gene vectors, offering a viable gene therapy strategy.
• The developed platform is rapid, scalable, and broadly applicable for advancing gene therapy applications.