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In vitro Digestion of Emulsions in a Single Droplet via Multi Subphase Exchange of Simulated Gastrointestinal Fluids
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Biodegradable, bile salt microparticles for localized fat dissolution.

Hanieh Safari1, Nicholas Kaczorowski1, Michael L Felder1

  • 1Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA.

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New gold-templated microparticles deliver bile salts effectively for treating liver diseases and obesity. These stable particles offer localized delivery, improving efficacy and reducing side effects compared to traditional methods.

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Area of Science:

  • Biomaterials Science
  • Drug Delivery Systems
  • Nanotechnology

Background:

  • Bile acids show therapeutic potential for liver diseases and obesity.
  • Current administration methods (oral, subcutaneous) have limited efficacy and cause side effects.
  • Need for improved delivery systems for bile acids.

Purpose of the Study:

  • To develop stable bile salt-cholate or deoxycholate-microparticles using a gold-templating method.
  • To evaluate the efficacy and safety of these microparticles for localized drug delivery.
  • To compare the performance of these microparticles against existing bile salt solutions.

Main Methods:

  • Fabrication of bile salt microparticles via gold-templating and double emulsion solvent evaporation.
  • Characterization of particle formation through gold-bile salt interaction.
  • Assessment of cholate/deoxycholate release mechanism (surface erosion).
  • In vitro and in vivo evaluation of adipocyte lysis and side effect profiles.

Main Results:

  • Stable bile salt-cholate/deoxycholate-microparticles were successfully fabricated.
  • Microparticles demonstrated controlled release of bile salts via surface erosion.
  • Particles effectively lysed adipocytes in vitro and in vivo.
  • Minimal side effects observed compared to FDA-approved salt solutions, which caused inflammation and ulceration.

Conclusions:

  • Gold-templated microparticles provide a stable platform for bile salt delivery.
  • Localized delivery of cholate/deoxycholate via microparticles enhances efficacy and reduces adverse effects.
  • This approach offers a promising alternative for treating bile acid-responsive conditions like liver diseases and obesity.