Molecular spherical nucleic acids

Area of Science:

• Nanotechnology
• Molecular Biology
• Biochemistry

Background:

• Spherical nucleic acids (SNAs) are promising for gene regulation.
• Conventional SNAs often use gold nanoparticles, leading to polydispersity.
• Developing molecularly pure SNAs is crucial for controlled cellular interactions.

Purpose of the Study:

• To synthesize and characterize novel molecular spherical nucleic acid (SNA) nanostructures.
• To compare the properties of SNAs based on different molecular scaffolds.
• To evaluate the potential of these SNAs as gene regulation agents.

Main Methods:

• Synthesis of SNA nanostructures using T8 polyhedral silsesquioxane and buckminsterfullerene C60 scaffolds.
• Modification of scaffolds with pendant DNA strands to create varying surface densities.
• Assessment of nuclease resistance, cellular uptake, and gene regulation capabilities.

Main Results:

• Two types of molecular SNAs were synthesized with distinct DNA surface densities.
• The C60 SNA conjugate demonstrated properties similar to gold nanoparticle SNAs.
• The C60 SNA functioned as an effective antisense agent, regulating gene expression without transfection agents.

Conclusions:

• Molecularly pure SNAs offer enhanced control over cellular interactions compared to polydisperse forms.
• Buckminsterfullerene C60-based SNAs show significant potential for gene regulation applications.
• These novel SNAs represent a step towards more precise molecular medicine and diagnostics.