DNA-based micelles: synthesis, micellar properties and size-dependent cell permeability

Area of Science:

• Biotechnology
• Nanomaterials
• Molecular Engineering

Background:

• Functional nanomaterials from molecular self-assembly show promise in biomedicine.
• Controlling size, structure, and function is key to improving nanomaterial efficacy.
• Molecular engineering is needed for monodispersed functional materials with tailored properties.

Purpose of the Study:

• To design and construct amphiphilic oligonucleotide molecules for self-assembly.
• To create monodispersed, three-dimensional micellar nanostructures.
• To evaluate the properties and applications of these novel DNA micelles.

Main Methods:

• Synthesized amphiphilic oligonucleotide molecules (oligonucleotide-lipid conjugates).
• Investigated self-assembly into micellar nanostructures in aqueous solutions.
• Characterized thermal stability, size tunability, and molecular recognition capabilities.
• Assessed cell membrane interaction, internalization via endocytosis, and size-dependent kinetics.

Main Results:

• Amphiphilic molecules self-assembled into monodispersed DNA-lipid micelles with a lipid core and DNA corona.
• Micelles exhibited excellent thermal stability and size-tunable properties based on DNA length.
• DNA's molecular recognition was preserved, enabling hybridization without structural loss.
• DNA micelles were internalized by cells via endocytosis, with size-dependent kinetics.

Conclusions:

• Engineered DNA-lipid micelles offer a versatile platform for nanobiotechnology.
• Their controlled self-assembly, stability, and cell permeability make them suitable for drug delivery.
• These functional nanostructures hold potential for applications in cell biology and nanomedicine.