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A self-assembled delivery platform with post-production tunable release rate.

Job Boekhoven1, Mathijs Koot, Tim A Wezendonk

  • 1Department of Chemical Engineering, Delft University of Technology , Julianalaan 136, 2628 BL Delft, The Netherlands.

Journal of the American Chemical Society
|July 25, 2012
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Summary

Researchers developed a tunable drug delivery platform using self-assembling molecules. The release rate of a fluorescent molecule from a gelator can be controlled by heating time, which dictates enzyme liberation from liposomes.

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Area of Science:

  • Biomaterials Science
  • Drug Delivery Systems
  • Nanotechnology

Background:

  • Self-assembling materials offer versatile platforms for various applications.
  • Controlling the release kinetics of active agents is crucial for effective drug delivery.
  • Enzyme-triggered release systems require precise control over enzyme activity.

Purpose of the Study:

  • To develop a novel delivery platform with a post-production tunable release rate.
  • To investigate enzyme-triggered release of a fluorescent small molecule from a self-assembled gelator.
  • To establish a method for controlling release kinetics via external stimuli.

Main Methods:

  • Utilized a three-component self-assembly process to create a delivery platform.
  • Incorporated a fluorophore-conjugated gelator susceptible to enzymatic hydrolysis.
  • Entrapped a specific enzyme within liposomes, releasing it upon controlled heating.
  • Correlated heating duration with enzyme liberation and subsequent release rate.

Main Results:

  • Successfully synthesized a self-assembled delivery platform.
  • Demonstrated enzyme-mediated hydrolysis of the gelator, releasing a fluorescent molecule.
  • Showcased tunable release kinetics by varying the heating time for enzyme liberation.
  • Established a direct relationship between heating duration and the rate of small molecule release.

Conclusions:

  • A novel, tunable drug delivery platform was successfully engineered.
  • Post-production control over release rates is achievable through externally triggered enzyme release.
  • This system holds potential for advanced therapeutic delivery applications requiring precise temporal control.