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Shin Mizukami1, Masayoshi Kashibe2, Kengo Matsumoto2

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Researchers developed versatile enzyme-triggered controlled release systems using liposomes and temporin L peptides. This innovation offers a novel theranostic tool for targeted drug delivery in diseased tissues.

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Area of Science:

  • Biotechnology
  • Materials Science
  • Drug Delivery

Background:

  • Controlled release is crucial for medical innovation, with stimulus-responsive nanocarriers being a key technology.
  • Enzyme activity in diseased tissues presents a promising trigger for controlled release, but versatile systems are lacking.
  • Existing stimulus-responsive systems often require complex designs and synthesis processes.

Purpose of the Study:

  • To develop versatile controlled release systems triggered by various stimuli, including enzyme activity, without modifying nanocarrier components.
  • To create novel nanocarrier systems utilizing liposomes and enzyme-cleavable peptides for controlled release applications.

Main Methods:

  • Developed two controlled release systems using liposomes as nanocarriers.
  • Incorporated temporin L (TL) and its derivatives as release controllers, modified to be activated by specific enzymes.
  • Designed protease-activated branched peptides and phosphatase-activated phosphopeptides.

Main Results:

  • Demonstrated enzyme-specific activation of TL derivatives, leading to membrane damage and release of liposome contents.
  • Successfully triggered controlled release using both protease and phosphatase enzyme activities.
  • Showcased the versatility of the developed antimicrobial peptide-based systems for different enzymatic stimuli.

Conclusions:

  • The developed liposome-based systems offer a versatile platform for enzyme-triggered controlled release.
  • This technology provides a novel theranostic tool with potential applications in targeted drug delivery.
  • The approach simplifies the design of stimulus-responsive nanocarriers, overcoming limitations of previous methods.