Sine-wave current for efficient and safe in vivo gene transfer

Area of Science:

• Biotechnology
• Molecular Biology
• Gene Therapy

Background:

• Electrogen-gene transfer enhances gene expression, particularly in muscle.
• Conventional direct current (DC) square-wave electroporation exhibits toxicity due to high field strengths.
• Minimizing toxicity is crucial for routine clinical application of electroporation.

Purpose of the Study:

• To evaluate the safety and efficiency of alternating current sine-wave (ACSW) pulses for in vivo gene transfer.
• To compare ACSW electroporation with conventional DC square-wave pulses regarding efficiency and toxicity.
• To assess the potential of ACSW pulses for therapeutic protein delivery.

Main Methods:

• In vivo gene transfer in muscle using alternating current sine-wave (ACSW) pulses at 60 Hz and 20 V/cm.
• Comparison of ACSW pulses with conventional DC square-wave pulses.
• Delivery of human clotting factor IX (hFIX) plasmid into muscle via ACSW electroporation.

Main Results:

• ACSW pulses achieved efficient in vivo gene transfer with significantly reduced toxicity.
• Muscle gene transfer efficiency increased more than tenfold compared to DC square-wave pulses.
• Successful phenotypic correction was observed in hemophilia B mice following hFIX gene transfer.

Conclusions:

• Alternating current sine-wave electroporation is a safe and highly efficient method for muscle gene transfer.
• ACSW pulses offer a less toxic alternative to conventional DC square-wave electroporation.
• This technique holds promise for advancing gene therapy, including the treatment of hemophilia B.