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Development and Evaluation of Stimuli-Responsive Chimeric Nanostructures.

Nikolaos Naziris¹, Natassa Pippa^1,2, Dimitris Stellas^3,4

¹Section of Pharmaceutical Technology, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Athens, Greece.

AAPS Pharmscitech

|July 22, 2018

Summary

Chimeric nanocarriers combining phospholipids and pH-sensitive polymers show tunable properties. Their composition influences membrane behavior and toxicity, suggesting potential for advanced drug delivery systems.

Keywords:

amphiphilic biomaterials biophysics chimeric nanosystems lyotropism pH-responsive

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Area of Science:

Materials Science
Nanotechnology
Biophysics

Background:

Chimeric/mixed stimuli-responsive nanocarriers are crucial for theranostics.
Understanding the influence of polymer composition on nanocarrier properties is essential.

Purpose of the Study:

To design and characterize chimeric nanosystems composed of phospholipids and pH-sensitive diblock copolymers.
To investigate the effect of polymer-lipid molar ratios and pH on nanocarrier properties and toxicity.

Main Methods:

Preparation of chimeric liposomes via thin-film hydration.
Characterization using thermal analysis, light scattering, and electron microscopy.
In vitro toxicity screening.

Main Results:

Nanocarrier properties, including membrane phase transition, were pH-dependent and influenced by copolymer composition and concentration.
Particle size was generally above 100 nm, with some morphology diversity observed.
In vitro toxicity was tolerable and dependent on material and polymer concentrations.

Conclusions:

The thermodynamic and biophysical properties of chimeric nanosystems are tunable via copolymer composition and concentration.
These chimeric systems demonstrate potential as advanced drug delivery nanosystems due to their promising profiles.