Antisense oligonucleotide delivery with polyhexylcyanoacrylate nanoparticles as carriers

Area of Science:

• Nanotechnology
• Drug Delivery
• Molecular Biology

Background:

• Polyalkylcyanoacrylate nanoparticles serve as effective colloidal drug carriers.
• Antisense oligonucleotides (ASOs) are crucial for gene silencing therapies but face challenges in delivery and stability.
• Developing efficient ASO delivery systems is vital for advancing therapeutic applications.

Purpose of the Study:

• To develop and characterize polyalkylcyanoacrylate nanoparticles for enhanced antisense oligonucleotide delivery.
• To investigate methods for improving ASO loading, stability, and cellular uptake within nanoparticles.
• To evaluate the in vivo biodistribution and therapeutic potential of ASO-loaded nanoparticles.

Main Methods:

• Emulsion polymerization was used to prepare polyalkylcyanoacrylate nanoparticles.
• Antisense oligonucleotides were loaded via adsorption, incorporating DEAE-dextran or CTAB for enhanced interaction.
• Enzymatic digestion inhibition, cellular uptake studies, and in vivo biodistribution in the liver were assessed.

Main Results:

• Nanoparticle complexation significantly inhibited enzymatic digestion of oligonucleotides.
• Cellular uptake of oligonucleotides was markedly enhanced across various cell lines.
• In vivo studies demonstrated preferential targeting of the oligonucleotide-nanoparticle complex to the liver.

Conclusions:

• Polyalkylcyanoacrylate nanoparticles provide a robust platform for ASO delivery, improving stability and cellular internalization.
• The developed nanoparticle system shows significant potential for enhancing antisense-based tumor and antiviral therapies.
• Liver targeting achieved with these nanoparticles opens avenues for treating hepatic diseases.