Self-Assembly Pathway Influence on Dehydropeptide-Based Gel Properties and Drug Release

Area of Science:

• Biomaterials Science
• Supramolecular Chemistry
• Drug Delivery Systems

Background:

• Self-assembled peptide hydrogels are promising for biomedical uses.
• Understanding gelation's impact on hydrogel properties and drug release is crucial.

Purpose of the Study:

• To investigate how gelation conditions affect dehydropeptide hydrogel morphology, mechanical properties, and drug release.
• To analyze the crystal structure of a specific dehydropeptide.

Main Methods:

• Synthesis and characterization of naphthalene N-capped dehydropeptide.
• Varied gelation conditions to form hydrogels.
• Mechanical testing, spectroscopic, and imaging techniques.
• Drug release studies using doxorubicin, methotrexate, and curcumin.

Main Results:

• Crystal structure of 2-Naph-L-Phe-Z-ΔPhe-OH revealed a pore diameter of ≈4.08 Å.
• Hydrogel stiffness varied by three orders of magnitude based on preparation.
• Assembly structure, morphology, and interactions correlated with drug release profiles.

Conclusions:

• Gelation conditions significantly control peptide hydrogel properties and drug release.
• Insights into tailoring hydrogel characteristics for specific biomedical applications.
• Foundation for designing advanced peptide-based drug delivery systems.