Multicomponent Hydrogel Matrices of Fmoc-FF and Cationic Peptides for Application in Tissue Engineering

Area of Science:

• Biomaterials Science
• Supramolecular Chemistry

Background:

• Peptide-based hydrogels are increasingly utilized in drug delivery and tissue engineering.
• Cationic peptides derivatized with Fmoc or FmocFF groups have been synthesized.

Purpose of the Study:

• To create novel self-sorted hydrogels by combining synthesized cationic peptides with FmocFF.
• To characterize the physical and biological properties of these new hydrogels.

Main Methods:

• Synthesis of cationic peptides and their derivatization.
• Formation of self-sorted hydrogels using varying weight/weight ratios of peptide components.
• Rheological and relaxometric characterization of hydrogel mechanical properties and water mobility.
• In vitro cell viability assays using 3T3-L1 cells.

Main Results:

• Seven novel self-sorted hydrogels were successfully achieved.
• Hydrogels exhibited a range of mechanical rigidities (storage modulus G' from 200 Pa to 35,000 Pa) and varying water mobility.
• Most hydrogels maintained high cell viability (>95%) over 72 hours.
• One specific hydrogel composition demonstrated significant promotion of 3T3-L1 cell adhesion, spreading, and proliferation.

Conclusions:

• The combination of specific cationic peptides and FmocFF yields tunable self-sorted hydrogels.
• These peptide-based hydrogels possess favorable mechanical properties and biocompatibility.
• One developed hydrogel shows promise as a synthetic extracellular matrix for regenerative medicine applications.