Self-Assembled of Multifunctional Fluorescent Copper-DNA Nanoflowers for Cell-Specific-Target MicroRNA Imaging.

Area of Science:

• Nanomaterials Science
• Biotechnology
• Molecular Biology

Background:

• Fabricating DNA-based composite nanomaterials with specific functions is crucial for advanced applications.
• Developing simple and versatile synthesis methods for these materials remains a significant challenge.

Purpose of the Study:

• To report a straightforward synthesis of multifunctional copper-DNA nanoflowers (Cu-DNF).
• To investigate the properties and potential applications of these Cu-DNF, particularly in tumor cell imaging.

Main Methods:

• Synthesized Cu-DNF using rolling circle polymerization and in situ copper nanoparticle formation.
• Controlled assembly to achieve precise sizes and stable fluorescence.
• Encoded Cu-DNF with CD63 aptamer sequences for enhanced tumor cell targeting.
• Evaluated biostability against nuclease degradation.
• Demonstrated intracellular tracking and imaging of microRNA in tumor cells.

Main Results:

• Successfully synthesized multifunctional Cu-DNF with controlled morphology and stable fluorescence.
• Achieved robust biostability, resisting nuclease degradation due to dense structure.
• Enhanced tumor cell binding affinity and internalization efficiency via aptamer encoding.
• Validated the use of Cu-DNF for efficient intracellular microRNA tracking and imaging.

Conclusions:

• The developed Cu-DNF offer a simple and versatile platform for creating advanced DNA-based nanomaterials.
• These multifunctional nanoflowers show significant potential for biomedical applications, including tumor cell imaging and diagnostics.
• The precise control over size, stability, and targeting enhances their utility in biological systems.