Thermally Robust Solvent-Free Liquid Polyplexes for Heat-Shock Protection and Long-Term Room Temperature Storage of...

Area of Science:

• Biomaterials Science
• Gene Therapy
• Drug Delivery Systems

Background:

• Nucleic acid therapeutics offer promise for disease prevention.
• Nonviral vectors like cationic polymers aid cellular uptake but lack thermal stability, necessitating cold chain transport.
• Poor thermal stability limits the global deployment and increases costs of nucleic acid therapeutics.

Purpose of the Study:

• To develop a biomaterial strategy for significantly improving the thermal stability of DNA polyplexes.
• To enable long-term, room temperature storage of nucleic acid therapeutics.
• To reduce the reliance on cold chain logistics for therapeutic distribution.

Main Methods:

• Development of a novel biomaterial strategy to enhance DNA polyplex thermal stability.
• Assessment of long-term storage at room temperature.
• Evaluation of transfection efficiency after extended storage.
• Heat shock studies to determine thermal resilience.

Main Results:

• Demonstrated long-term room temperature storage of DNA polyplexes for at least 9 months.
• Maintained high transfection efficiency after 9 months of room temperature storage.
• Showcased retained luciferase expression after heat treatment at 70 °C.

Conclusions:

• A biomaterial strategy can drastically improve the thermal stability of DNA polyplexes.
• Long-term room temperature storage of nucleic acid therapeutics is achievable, eliminating cold chain requirements.
• This platform biotechnology has the potential to reduce the cost and improve the global accessibility of life-saving nucleic acid therapeutics.