Interaction between drug loaded polyaspartamide-polylactide-polysorbate based micelles and cell membrane models: a...

Area of Science:

• Biomaterials Science
• Drug Delivery
• Neuroscience

Background:

• Amphiphilic biodegradable copolymers self-assemble into micelles for drug delivery.
• α,β-Poly[(N-hydroxyethyl)-dl-aspartamide] (PHEA) is used to create graft copolymers.
• PHEA-ethylenediamine (PHEA-EDA) functionalized with polysorbate 80 (PS₈₀) and polylactide (PLA) forms micelles for central nervous system (CNS) drug delivery.

Purpose of the Study:

• Investigate the interaction and absorption of PHEA-EDA-PS₈₀-PLA micelles loaded with (R)-flurbiprofen with biomembrane models.
• Evaluate drug release from these micelles to lipid vesicles in simulated physiological fluid.
• Assess the potential of these polymeric micelles for delivering drugs to the CNS, specifically targeting Alzheimer's disease.

Main Methods:

• Utilized differential scanning calorimetry (DSC) to study micelle-biomembrane interactions.
• Employed multilamellar and unilamellar vesicles made of dimyristoylphosphatidylcholine (DMPC) as biomembrane models.
• Investigated drug release kinetics in simulated physiological fluid.

Main Results:

• The interaction and absorption of PHEA-EDA-PS₈₀-PLA micelles loaded with (R)-flurbiprofen with DMPC vesicles were successfully investigated.
• (R)-Flurbiprofen, an enantiomer of a nonsteroidal anti-inflammatory drug known for potential Alzheimer's disease risk reduction, was used.
• Drug release from the micelles to the lipid vesicles was observed and found to be affected by the biomembrane model.

Conclusions:

• PHEA-EDA-PS₈₀-PLA micelles loaded with (R)-flurbiprofen demonstrate potential for targeted drug delivery to the central nervous system.
• The study provides insights into the interaction of these polymeric micelles with biological membranes.
• Drug release characteristics are dependent on the biomembrane model, suggesting tailored delivery strategies may be necessary.