Aptamer-targeted DNA nanostructures for therapeutic delivery

Area of Science:

• Biotechnology
• Nanotechnology
• Molecular Biology

Background:

• DNA nanostructures offer programmable, uniform structures with biocompatibility and biodegradability.
• Their potential as drug delivery vehicles is actively explored.
• AS1411 aptamers are known for cancer cell targeting.

Purpose of the Study:

• To investigate the therapeutic potential of DNA nanostructures incorporating AS1411 aptamers.
• To evaluate the efficacy of these constructs in cancer cell treatment.
• To assess their stability against nuclease degradation.

Main Methods:

• Fabrication of DNA pyramids functionalized with AS1411 aptamers.
• Assessment of intracellular uptake in cancer cells.
• Evaluation of cancer cell growth inhibition.
• Nuclease degradation resistance assays.

Main Results:

• DNA pyramids with AS1411 aptamers demonstrated enhanced intracellular uptake.
• Selective inhibition of cancer cell growth was observed without transfection reagents.
• Aptamer-displaying pyramids exhibited significantly higher resistance to nuclease degradation compared to single-stranded aptamers.

Conclusions:

• DNA nanostructures, specifically AS1411-functionalized pyramids, show promise as effective and stable delivery vehicles for cancer therapy.
• The modularity and enhanced stability of these nanostructures support their potential in therapeutic applications.
• This approach bypasses the need for traditional transfection reagents, simplifying delivery.