Biomolecular dynamic covalent polymers for DNA complexation and siRNA delivery

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Gene Therapy Delivery

Background:

• Smart synthetic delivery systems are crucial for advancing gene therapies.
• Dynamic covalent polymers (DCPs) offer adaptive chain length adjustment.
• Polyacylhydrazone DCPs exhibit pH-sensitivity, useful for targeted release.

Purpose of the Study:

• To develop a new generation of multifunctional DCPs for gene delivery.
• To incorporate modified amino acids into DCP structures.
• To evaluate the capacity of these DCPs to complex and deliver nucleic acids.

Main Methods:

• Covalent self-assembly via polycondensation to create multifunctional DCPs.
• Design of DCPs combining various building blocks and dynamic properties.
• Complexation studies with long DNA and small interfering RNA (siRNA).
• In-cell biological studies to assess siRNA delivery efficacy.

Main Results:

• The novel biomolecular DCPs successfully complexed both long DNA and siRNA.
• Demonstrated ability of DCPs to deliver functional siRNA into living cells.
• The modular approach allows for straightforward self-production of versatile DCPs.

Conclusions:

• Multifunctional DCPs incorporating modified amino acids are effective siRNA vectors.
• This adaptable biomolecular platform represents a significant advance in smart gene delivery.
• The developed DCPs show promise for future therapeutic applications in gene therapy.