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PRCosomes: pretty reactive complexes formed in liposomes.

Mohamed Wehbe1,2, Lina Chernov1,3, Kent Chen1,4

  • 1a Experimental Therapeutics, British Columbia Cancer Agency , Vancouver , BC , Canada.

Journal of Drug Targeting
|May 5, 2016
PubMed
Summary

Researchers developed PRCosomes, a novel liposomal formulation, using metal complexation for efficient drug loading. This method utilizes transmembrane gradients and color changes to confirm high encapsulation efficiency for drug candidates like doxorubicin.

Keywords:
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Area of Science:

  • Lipid Nanoparticle Technology
  • Drug Delivery Systems
  • Biophysical Chemistry

Background:

  • Pieter R. Cullis pioneered liposome technology.
  • Safranine dye was used to quantify transmembrane gradients in liposomes.
  • This work builds upon established remote loading methodologies.

Purpose of the Study:

  • To introduce PRCosomes, a liposomal formulation honoring Pieter R. Cullis.
  • To explore metal-drug complexation for enhanced liposomal drug loading.
  • To differentiate loading mechanisms: metal-drug complexation versus pH gradient.

Main Methods:

  • Utilized safranine dye to assess liposome transmembrane gradients.
  • Developed PRCosomes using metal complexation reactions.
  • Investigated doxorubicin encapsulation via manganese complexation within liposomes.

Main Results:

  • Achieved >98% dye encapsulation, detectable by visual color change.
  • Demonstrated successful drug loading (doxorubicin) via metal complexation.
  • Established a colorimetric method to monitor drug encapsulation.

Conclusions:

  • PRCosomes offer a versatile platform for metal-drug complexed liposomes.
  • Metal complexation is an effective strategy for remote drug loading.
  • The developed method allows differentiation between loading mechanisms.