Functional modification of Sendai virus by siRNA

Area of Science:

• Virology
• Molecular Biology
• Biotechnology

Background:

• Sendai virus (hemagglutinating virus of Japan; HVJ), a negative-strand RNA virus, is used for gene transfer and drug delivery.
• The hemagglutinin-neuraminidase (HN) protein mediates cell fusion but causes red blood cell agglutination, limiting in vivo applications.
• HN-depleted HVJ is desirable for safer in vivo transfection.

Purpose of the Study:

• To produce HN-depleted HVJ using short interfering RNA (siRNA).
• To evaluate the efficacy of HN-depleted HVJ as a potential gene delivery vector.

Main Methods:

• HN-specific siRNA was used to deplete HN protein expression in HVJ.
• Viral production, protein levels, hemagglutinating activity, and infectivity were assessed.
• Transfection efficiency of oligodeoxynucleotides using modified HVJ was evaluated.

Main Results:

• HN-depleted HVJ was successfully produced without affecting overall viral production.
• HN protein levels were significantly reduced, leading to decreased hemagglutinating and infection activities.
• HN-depleted HVJ recovered infectivity (~80% of wild-type) upon centrifugation with cells, enabling oligodeoxynucleotide transfection.

Conclusions:

• siRNA technology effectively produces HN-depleted HVJ, reducing undesirable viral properties.
• The modified HVJ shows promise as a safer and effective delivery vector for gene transfer and potentially drug delivery.