Poly(L-aspartic acid) derivative soluble in a volatile organic solvent for biomedical application

Area of Science:

• Polymer Chemistry
• Materials Science
• Biomedical Engineering

Background:

• Developing functional polymers soluble in organic solvents is crucial for advanced drug delivery systems.
• Stimuli-responsive drug carriers offer controlled release mechanisms, enhancing therapeutic efficacy.
• Poly(L-aspartic acid) and polyethylene glycol are biocompatible materials with potential in nanomedicine.

Purpose of the Study:

• To synthesize a novel poly(L-aspartic acid) derivative, poly[L-aspartic acid-g-(3-diethylaminopropyl)]-b-poly(ethylene glycol) [poly(L-Asp-g-DEAP)-b-PEG].
• To investigate the solubility of the synthesized polymer in volatile organic solvents.
• To fabricate and characterize polymeric micelles for pH-stimulated drug release.

Main Methods:

• Conjugation of 3-diethylaminopropyl (DEAP) to poly(L-aspartic acid)-b-poly(ethylene glycol) [poly(L-Asp)-b-PEG].
• Solubility testing in dichloromethane, chloroform, and acetone.
• Fabrication of polymeric micelles using the film rehydration method.
• Encapsulation and pH-stimulated release studies using doxorubicin (DOX) as a model drug.

Main Results:

• The synthesized poly(L-Asp-g-DEAP)-b-PEG exhibited good solubility in volatile organic solvents.
• Polymeric micelles were successfully fabricated using the film rehydration method, minimizing residual solvent.
• The micelles demonstrated pH-stimulated release of doxorubicin, attributed to the protonation of DEAP.

Conclusions:

• The novel poly(L-aspartic acid) derivative is soluble in volatile organic solvents, facilitating micelle formation.
• The fabricated micelles show potential as stimuli-sensitive drug carriers for controlled drug delivery.
• This material offers pharmaceutical potential for developing new drug carriers for various therapeutic agents.