Researchers Develop Stable DNA Nanostructures for Biomedical Applications

A team of researchers from the University of Minnesota has made significant progress in developing stable DNA nanostructures for biomedical applications. According to their study, published in Nano Letters, the instability of DNA in serum due to nuclease activity has long been a major limitation for biomedical applications. However, the researchers have discovered a novel approach to enhance the serum stability and cellular uptake of DNA nanostructures by self-assembling metallointercalators.

Key Takeaways:

• The researchers have discovered that self-assembling metallointercalators in a DNA tetrahedron significantly enhances both the serum stability and the cellular uptake of the DNA nanostructure.
• The stability of the metallointercalator@DNA tetrahedron assembly in serum decreases in the order [Pt-(dppz)(py-4NH)] [Pt-(dppz)(en)] [Eu-(dppz)(EDTA-BMA)], a trend that mirrors the affinity of the metallointercalator for the DNA nanostructure.
• The research suggests that ancillary ligands and metal ions play a significant role in the stability of these nanoassemblies, with three complexes being synthesized.
• The study concludes that an efficient metallointercalator with ancillary ligands that can occupy the major groove pockets or minor groove provides greater stabilization of DNA nanostructures in serum necessary for biomedical applications.

Statistics:

• The stability of the metallointercalator@DNA tetrahedron assembly in serum decreases in the order [Pt-(dppz)(py-4NH)] [Pt-(dppz)(en)] [Eu-(dppz)(EDTA-BMA)].
• The study synthesizes three complexes, [Pt-(dppz)(py-4NH)], [Pt-(dppz)(en)], and [Eu-(dppz)(EDTA-BMA)].