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Rate-programmed drug delivery systems release drugs in a controlled manner to maintain therapeutic levels. Three main designs include reservoir, matrix, and hybrid systems.Reservoir systems consist of a drug core enclosed within a membrane that controls drug release. In non-swelling reservoir systems, polymers like ethyl cellulose or polymethacrylates are used. These do not hydrate in aqueous media and control release through membrane thickness, porosity, or insolubility. This type includes...
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Combinatorial Synthesis of and High-throughput Protein Release from Polymer Film and Nanoparticle Libraries
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Published on: September 6, 2012

Multiple polymersomes for programmed release of multiple components.

Shin-Hyun Kim1, Ho Cheung Shum, Jin Woong Kim

  • 1School of Engineering and Applied Sciences and Department of Physics, Harvard University, Cambridge, Massachusetts, United States.

Journal of the American Chemical Society
|August 16, 2011
PubMed
Summary
This summary is machine-generated.

Researchers developed a microfluidic method to create polymersomes-in-polymersome for controlled release of multiple components. This novel delivery system offers high encapsulation efficiency and programmability for pharmaceutical and cosmetic applications.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Polymersomes are promising drug delivery vehicles but struggle with co-encapsulation and controlled release of multiple components.
  • Current methods lack the ability to independently manage multiple payloads within a single delivery system, limiting applications in pharmaceuticals and cosmetics.

Purpose of the Study:

  • To develop a microfluidic approach for creating multi-layered polymersomes capable of encapsulating and sequentially releasing multiple components.
  • To enable controlled, long-term storage and release of diverse substances without cross-contamination.

Main Methods:

  • A microfluidic technique was employed to generate monodisperse double-emulsion drops, serving as templates for multi-layered polymersomes.
  • Sequential injection of emulsion phases allowed for the creation of "polymersomes-in-polymersome" structures.
  • Incorporation of hydrophobic homopolymers into bilayers facilitated programmed, sequential membrane dissociation.

Main Results:

  • Successfully produced multi-layered "polymersomes-in-polymersome" with high encapsulation efficiency.
  • Demonstrated programmed and sequential release of encapsulated components through controlled bilayer dissociation.
  • The microfluidic method allows for the creation of higher-order, complex polymersome structures.

Conclusions:

  • The developed microfluidic approach enables the creation of advanced polymersome systems for multi-component delivery.
  • This technology offers programmable, sequential release capabilities, overcoming limitations of existing polymersome vehicles.
  • The biocompatibility and efficiency of this method present new avenues for sophisticated delivery systems in various industries.