Expanding the chemical functionality of DNA nanomaterials generated by rolling circle amplification

Area of Science:

• Biotechnology
• Nanotechnology
• Materials Science

Background:

• Rolling circle amplification (RCA) is crucial for creating DNA nanomaterials (e.g., DNA nanoflowers, DNFs) with applications in therapeutics and diagnostics.
• Current limitations exist in expanding the chemical functionality of these DNA nanomaterials.

Purpose of the Study:

• To present orthogonal strategies for producing densely modified RCA products and DNFs.
• To enable selective modification of DNA components and/or protein cargo within these nanomaterials.

Main Methods:

• Developed orthogonal chemical modification strategies for RCA products and DNFs.
• Applied methods to selectively functionalize DNA and protein elements of the nanomaterials.
• Constructed DNFs with surface-bound aptamers and peptides targeting cancer cells overexpressing HER2.

Main Results:

• Successfully produced densely modified RCA products and DNFs with expanded chemical functionalities.
• Demonstrated the ability to selectively modify both DNA and protein components.
• Created functionalized DNFs capable of binding to HER2-expressing cancer cells.

Conclusions:

• The presented orthogonal strategies significantly expand the chemical versatility of DNA nanomaterials.
• The developed methodology allows for the creation of targeted nanostructures for biomedical applications.
• Functionalized DNFs show promise for future diagnostic and therapeutic interventions in oncology.