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Stabilization of chitosan/hyaluronan colloidal polyelectrolyte complexes in physiological conditions
1Ingénierie des Matériaux Polymères, UMR CNRS 5223, Université Claude Bernard Lyon 1, 15 Bd. André Latarjet, Bât. Polytech, 69622 Villeurbanne Cedex, France.
Carbohydrate Polymers
|January 8, 2015
Summary
Hyaluronan-chitosan polyelectrolyte complexes (PECs) were stabilized using zinc(II) ions. These zinc-stabilized PECs show excellent colloidal stability in saline, indicating potential for safe and effective drug delivery applications.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Nanotechnology
Background:
- Polyelectrolyte complexes (PECs) formed between oppositely charged polymers offer versatile platforms for various applications.
- Hyaluronan (HYA) and chitosan are biocompatible polymers with significant potential in biomedical fields.
- Maintaining colloidal stability of PECs under physiological conditions is crucial for their practical use, especially in drug delivery.
Purpose of the Study:
- To investigate the formation and stability of polyelectrolyte complexes (PECs) between hyaluronan and chitosan.
- To evaluate the influence of intrinsic and extrinsic parameters on PEC particle size and polydispersity.
- To enhance the colloidal stability of chitosan-HYA PECs under physiological conditions using zinc(II) ions.
Main Methods:
- Formation of PECs via one-shot addition of hyaluronan to chitosan.
- Systematic investigation of parameters including polymer properties, charge mixing ratio, concentration, and pH.
- Characterization of PECs using dynamic light scattering (DLS).
- Assessment of colloidal stability in aqueous solutions and phosphate-buffered saline (PBS).
- Evaluation of stabilization effects of zinc(II) addition during or after PEC formation.
Main Results:
- Chitosan-hyaluronan PECs were successfully formed and characterized.
- Particle size and polydispersity were found to be dependent on various formation parameters.
- PECs exhibited good colloidal stability in water.
- Addition of zinc(II) ions significantly enhanced PEC stability in PBS at physiological conditions.
- Zinc-stabilized PECs maintained constant particle size and stability at room temperature for at least 35 days.
Conclusions:
- Zinc(II) ions effectively stabilize chitosan-hyaluronan polyelectrolyte complexes in physiological saline.
- The stabilization is robust and independent of whether zinc is added during or after complex formation.
- These findings highlight the promising potential of zinc-stabilized chitosan-HYA PECs as safe and efficient drug delivery systems.
Keywords:
ChitosanHyaluronanNanoparticlesPhysiological conditionsPolyelectrolyte complexesStabilizationMore Related Videos
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