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Tuning hydrogels through metal-based gelation triggers.

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Summary

Two novel tripeptides form versatile hydrogels triggered by acid, metal salts, or cell media. Metal salt or media triggers enhance cell viability, offering tunable biomaterial properties.

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Area of Science:

  • Biomaterials Science
  • Supramolecular Chemistry
  • Chemical Biology

Background:

  • N-terminal capped tripeptides offer unique self-assembly properties.
  • Hydrogel formation is crucial for various biomedical applications.
  • Controlling hydrogel properties and biocompatibility is an ongoing challenge.

Purpose of the Study:

  • To synthesize and characterize novel N-terminal capped tripeptides.
  • To investigate the versatile gelation behavior of these tripeptides.
  • To evaluate the impact of different triggers on hydrogel properties and cell viability.

Main Methods:

  • Synthesis of two N-terminal capped tripeptides.
  • Gelation studies triggered by acid, metal salts (e.g., sodium cations), and cell culture media.
  • Characterization of hydrogel structural and mechanical properties.
  • In vitro cell viability assays.

Main Results:

  • The synthesized tripeptides demonstrated versatile gelation in response to various triggers.
  • Gelation triggered by sodium cations enhanced secondary structure organization but reduced stiffness.
  • Significant improvements in cell survival were observed when gelation was induced by metal salts or cell culture media.

Conclusions:

  • N-terminal capped tripeptides provide a tunable platform for hydrogel formation.
  • The choice of gelation trigger significantly influences hydrogel characteristics and biological outcomes.
  • These findings highlight the potential of these tripeptides as advanced biomaterials for cell-based applications.