Directional molecular sliding movement in peptide hydrogels accelerates cell proliferation

Area of Science:

• Biomaterials Science
• Cellular Mechanics
• Tissue Engineering

Background:

• Cellular microenvironments provide mechanical cues crucial for cell behavior.
• Dynamic mechanical properties of the extracellular matrix influence cell proliferation and function.

Purpose of the Study:

• To investigate the effect of mechanically dynamic hydrogels with directional domain sliding motion on cell proliferation.
• To explore the potential of these hydrogels as biomimetic extracellular matrices.

Main Methods:

• Preparation of mechanically dynamic hydrogels via self-assembly of amphiphilic peptides with disulfide cross-links.
• Induction of directional domain sliding motion through disulfide bond reduction and thermodynamic transition.
• Incubation of cells on dynamic hydrogels and comparison with static counterparts.

Main Results:

• Mechanically dynamic hydrogels exhibited directional domain sliding motion.
• Cell proliferation was accelerated on dynamic hydrogels compared to static ones.
• Mechanotransduction, evidenced by yes-associated protein translocation, mediated the observed effects.

Conclusions:

• Directional domain sliding in hydrogels effectively accelerates cell proliferation.
• These dynamic hydrogels show promise as advanced biomimetic extracellular matrices.
• The findings highlight the potential for engineering dynamic mechanical cues in regenerative medicine.