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Preparation and Characterization of Nanoliposomes for the Entrapment of Bioactive Hydrophilic Globular Proteins
11:30

Preparation and Characterization of Nanoliposomes for the Entrapment of Bioactive Hydrophilic Globular Proteins

Published on: August 31, 2019

Liposomes in double-emulsion globules.

Qing Wang1, Grace Tan, Louise B Lawson

  • 1Department of Chemical & Biomolecular Engineering, Tulane University, New Orleans, Louisiana 70118, USA.

Langmuir : the ACS Journal of Surfaces and Colloids
|December 5, 2009
PubMed
Summary
This summary is machine-generated.

This study shows that tubular liposomes enhance the stability of water-in-oil-in-water double emulsions. The presence of liposomes within the emulsion globules acts as a stabilizing factor, improving controlled release.

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Area of Science:

  • Colloid and Surface Science
  • Materials Science
  • Pharmaceutical Sciences

Background:

  • Water-in-oil-in-water (W(1)/O/W(2)) double emulsions are complex systems with potential applications in controlled release.
  • Liposomes are frequently used as carriers for active compounds, but their stability within emulsions needs optimization.

Purpose of the Study:

  • To investigate the protective role of the oil membrane in double emulsions for entrapped liposomes.
  • To explore the controlled release of liposomes from double emulsion globules.
  • To determine if liposomes themselves can stabilize double emulsion systems.

Main Methods:

  • Preparation of tubular liposomes containing fluorescein sodium salt (FSS) within the W(1) phase of W(1)/O/W(2) double emulsions.
  • Microscopic observation of liposome release via external coalescence.
  • Monitoring system behavior using capillary video microscopy.
  • Stabilization of double emulsions using Tween 80 and Span 80 surfactants in n-hexadecane oil phase.

Main Results:

  • Liposomes containing FSS were successfully entrapped and released from the double emulsion globules.
  • The concentration of Tween 80 and Span 80 surfactants modulated the release rate of liposomes.
  • A key finding is that the liposomes themselves significantly stabilized the double emulsion globules.

Conclusions:

  • The oil membrane of double emulsions can offer protection to entrapped liposomes.
  • Controlled release of liposomes from double emulsions is achievable by adjusting surfactant concentrations.
  • Liposomes act as intrinsic stabilizers for W(1)/O/W(2) double emulsion systems, a novel finding with implications for formulation stability.