Customized Scaffolds for Direct Assembly of Functionalized DNA Origami

Area of Science:

• Nanotechnology
• Biomedical Engineering
• Molecular Biology

Background:

• DNA origami nanoparticles (DNA-NPs) are versatile nanocarriers for drug delivery and vaccines.
• Current DNA-NP functionalization methods have limitations in accessibility and cost for extensive modifications.
• Precise organization of functional moieties on DNA-NPs is crucial for enhanced targeting, actuation, and stability.

Purpose of the Study:

• To develop a simplified and robust strategy for synthesizing functional DNA-NPs.
• To overcome limitations of traditional DNA-NP functionalization methods.
• To enable efficient random and precise modification of DNA-NPs.

Main Methods:

• Developed an asymmetric polymerase chain reaction (aPCR) protocol for custom-length scaffold synthesis.
• Synthesized and characterized scaffold strands with amine groups, phosphorothioate bonds, and biotin.
• Validated sequence design for precise biomolecule conjugation using binding loops and aptamer sequences.

Main Results:

• Successfully produced heavily modified scaffold strands for dye functionalization, enhanced stability, and surface immobilization.
• Demonstrated the capability of sequence design for precise conjugation of nucleic acid-tagged biomolecules and protein targets.
• The aPCR strategy allows for direct synthesis of custom scaffolds with desired modifications.

Conclusions:

• The proposed aPCR strategy offers a simple, robust, and cost-effective method for synthesizing functional DNA-NPs.
• This approach enhances the accessibility and efficiency of DNA-NP functionalization for diverse biomedical applications.
• The direct synthesis of custom scaffolds facilitates advanced applications in targeted drug delivery and diagnostics.