Degradable hybrid materials based on cationic acylhydrazone dynamic covalent polymers promote DNA complexation...

Area of Science:

• Polymer Chemistry
• Biomaterials Science
• Gene Therapy

Background:

• Smart nonviral vectors are crucial for effective gene therapy delivery.
• Degradable polymers offer multivalent binding and controlled drug release.
• Dynamic covalent chemistry enables the creation of adaptable macromolecular structures.

Purpose of the Study:

• To design and synthesize novel degradable, dynamic polyacylhydrazone-based materials for gene delivery.
• To investigate the polymer formation, degradation, and DNA complexation capabilities of these novel materials.
• To evaluate the potential of these materials as smart nonviral vectors for therapeutic applications.

Main Methods:

• Synthesis of hybrid polyacylhydrazone-based dynamic materials.
• Characterization using 1H and DOSY NMR spectroscopy.
• Assessment of acid-catalyzed degradation via HPLC.
• Evaluation of dsDNA complexation using ethidium bromide displacement assay and gel electrophoresis.

Main Results:

• Polymer formation was concentration-dependent, yielding polymers at high and macrocycles at low concentrations.
• Materials exhibited acid-catalyzed degradation in aqueous buffers (pH 5.0–7.0).
• Effective complexation of dsDNA in buffer and serum was demonstrated at comparable N/P ratios to polyethyleneimine.

Conclusions:

• Dynamic covalent polymer self-assembly is a viable strategy for creating degradable gene delivery vectors.
• These materials effectively complex dsDNA through multivalent interactions in biological media.
• The designed materials show promise for advanced gene therapy applications requiring controlled release and efficient delivery.