Targeted cell-cell interactions by DNA nanoscaffold-templated multivalent bispecific aptamers

Area of Science:

• Biotechnology
• Molecular Biology
• Nanotechnology

Background:

• Cell-cell interactions are fundamental to multicellular life, impacting development, function, and immunity.
• Precise control over these interactions is crucial for understanding biological processes and developing new therapies.

Purpose of the Study:

• To engineer self-assembled DNA nanostructures capable of inducing specific cell-cell interactions.
• To create a versatile platform using multivalent, bispecific, cell-targeting aptamers for controlled cellular engagement.

Main Methods:

• Designing various DNA nanoscaffolds to present aptamers with controlled valency and flexibility.
• Assembling multivalent, bispecific aptamer fusion molecules onto DNA nanoscaffolds.
• Testing the cellular binding capabilities and specificity of the engineered nanostructures.

Main Results:

• Rigid DNA nanoscaffolds with multivalent aptamers demonstrated enhanced binding activities.
• The constructed DNA nanostructures successfully linked two distinct cell types.
• The aptamer-based strategy achieved high cell specificity, binding efficiency, and stability without cell surface modification.

Conclusions:

• Multivalent bispecific aptamers, when assembled on DNA nanoscaffolds, can effectively mediate cellular engagement.
• This approach provides a novel method for directing and guiding cell-cell interactions in biological systems.
• The findings pave the way for applications in synthetic biology, regenerative medicine, and targeted therapies.