Directed intermixing in multicomponent self-assembling biomaterials.

Area of Science:

• Biomaterials Science
• Supramolecular Chemistry
• Tissue Engineering

Background:

• Multifunctional biomaterials are often created through noncovalent coassembly of different peptides.
• Existing materials typically feature homogeneous self-assemblies with uniform functional component distribution.
• Control over peptide intermixing in self-assemblies has been limited.

Purpose of the Study:

• To demonstrate control over the intermixing of different self-assembling peptides.
• To show how controlling peptide intermixing can modulate biomaterial properties.
• To explore applications in enhancing mechanical and biological characteristics of biomaterials.

Main Methods:

• Utilizing heterobifunctional cross-linkers in beta-sheet fibrillizing hydrogels.
• Sequestering peptides with distinct reactive groups into separate fibril populations.
• Specifying the intermixing of RGD-bearing peptides in 2-D and 3-D self-assemblies.

Main Results:

• Significant increases in hydrogel stiffening achieved through interfibril cross-linking.
• Modulated growth of Human Umbilical Vein Endothelial Cells (HUVECs) and NIH 3T3 cells.
• Demonstrated a simple yet powerful method for controlling material properties.

Conclusions:

• Controlled peptide coassembly offers a versatile strategy for designing advanced biomaterials.
• This approach allows for precise tuning of mechanical and biological functionalities.
• The method is broadly applicable to various self-assembling systems forming stable supramolecular structures.