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Giant polymersomes can be engineered for controlled content release. By using specific enzymes, researchers can trigger polymersome rupture, enabling on-demand secretion for potential applications in protocell development.

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Area of Science:

  • Biomaterials science
  • Chemical engineering
  • Synthetic biology

Background:

  • Polymersomes are stable vesicles formed from amphiphilic block co-polymers.
  • Microfluidics enables the production of uniform giant polymersomes with encapsulated contents.
  • Controlled release of encapsulated materials is crucial for developing artificial cells.

Purpose of the Study:

  • To engineer polymersomes that can be controllably ruptured.
  • To investigate the kinetics of polymersome rupture induced by enzymatic reactions.
  • To demonstrate the potential for on-demand secretion from engineered protocells.

Main Methods:

  • Fabrication of giant polymersomes using microfluidic templating of double emulsions.
  • Design of a two-step enzymatic reaction system, with enzymes localized both inside and outside the polymersomes.
  • Measurement of polymersome rupture kinetics as a function of enzyme concentration.

Main Results:

  • Successful induction of polymersome rupture using the designed enzymatic cascade.
  • Demonstration that rupture kinetics are dependent on enzyme concentrations.
  • Quantification of the relationship between enzyme concentration and the rate of polymersome rupture.

Conclusions:

  • Engineered polymersomes can undergo triggered rupture via enzymatic reactions.
  • The rate of content secretion can be modulated by adjusting enzyme concentrations.
  • This work provides a foundation for creating protocells capable of on-demand secretion.