Responsive peptide-based supramolecular hydrogels constructed by self-immolative chemistry.

Area of Science:

• Supramolecular chemistry
• Biomaterials science
• Chemical biology

Background:

• Stimuli-responsive hydrogels are crucial for advanced biological applications.
• Peptide-based hydrogels offer biocompatibility and tunable properties.
• Specific biological signaling molecules require targeted detection and response mechanisms.

Purpose of the Study:

• To design and synthesize novel peptide-based supramolecular hydrogels.
• To achieve stimuli-responsiveness to key biological signaling molecules: glutathione (GSH), nitric oxide (NO), and hydrogen sulfide (H2S).
• To evaluate the potential of these hydrogels for drug delivery and sensing.

Main Methods:

• Utilized "self-immolative" chemistry to design responsive hydrogelators.
• Modified short peptides with self-immolative capping groups.
• Investigated gel-sol phase transitions triggered by specific analytes.
• Demonstrated drug release capabilities of the developed hydrogels.

Main Results:

• Successfully synthesized peptide-based supramolecular hydrogels exhibiting responsiveness to GSH, NO, and H2S.
• Confirmed that the removal of self-immolative capping groups induces gel-sol phase transitions.
• Showcased the hydrogels' efficacy in controlled drug release applications.
• Established the hydrogels as potential candidates for sensing and drug delivery systems.

Conclusions:

• Developed a series of peptide-based supramolecular hydrogels with tunable responsiveness to biological signals.
• Demonstrated the utility of self-immolative chemistry in creating advanced hydrogel systems.
• Highlighted the significant potential of these responsive hydrogels for biomedical applications, including targeted drug delivery and biosensing.