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A prototype reversible polymersome-stabilized H2S photoejector operating under pseudophysiological conditions.

A Tron1, A Peyret2, J Thevenot2

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Persistent polymersome capsules stabilize malachite green derivatives, releasing hydrogen sulfide (H2S) upon photoirradiation. This method efficiently generates H2S at physiologically relevant concentrations for potential applications.

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Biomedical Engineering

Background:

  • Polymersome capsules offer versatile platforms for drug delivery and molecular encapsulation.
  • Malachite green derivatives are utilized in various chemical and biological applications.
  • Controlled release of signaling molecules like hydrogen sulfide is crucial for biological studies.

Purpose of the Study:

  • To develop a system for stabilizing and releasing hydrogen sulfide (H2S) using polymersome nanocarriers.
  • To investigate the photo-responsive behavior of functionalized malachite green derivatives within polymersomes.
  • To demonstrate the efficient generation of physiologically relevant H2S concentrations.

Main Methods:

  • Self-assembly of persistent polymersome capsules.
  • Encapsulation of hydrosulfide- and hydroxylated malachite green derivatives in their leuco-forms.
  • Photoirradiation studies to induce molecule release and chemical transformation.
  • Spectroscopic analysis to quantify hydroxide release and H2S generation.

Main Results:

  • Polymersomes successfully solubilized and stabilized the target malachite green derivatives in aqueous solution.
  • Photoirradiation triggered reversible hydroxide release and subsequent hydrogen sulfide generation.
  • The system demonstrated efficient augmentation of H2S concentration to physiologically relevant levels.

Conclusions:

  • Persistent polymersomes are effective carriers for functionalized malachite green derivatives.
  • Photo-responsive H2S generation from these systems is achievable.
  • This approach offers a promising strategy for controlled H2S delivery in biological contexts.