Injectable Alginate-Peptide Composite Hydrogel as a Scaffold for Bone Tissue Regeneration

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Growing demand for effective bone regeneration biomaterials for minimally invasive procedures.
• Need for injectable scaffolds with suitable mechanical properties and biocompatibility.

Purpose of the Study:

• To investigate the potential of an alginate-FmocFF composite hydrogel as a biomaterial for bone regeneration.
• To evaluate the structural, mechanical, and biological properties of the composite hydrogel.

Main Methods:

• Fabrication of alginate-FmocFF composite hydrogel without cross-linking agents.
• Characterization using scanning electron microscopy and rheological measurements.
• In vitro assessment of biocompatibility, cell adhesion, osteogenic differentiation, and mineralization using MC3T3-E1 cells.

Main Results:

• The composite hydrogel displayed a nanofibrous structure mimicking the bone extracellular matrix.
• It exhibited thixotropic behavior and a high storage modulus (~10 kPa).
• Good cell viability, adhesion, osteogenic differentiation, and calcium mineralization were observed.

Conclusions:

• The alginate-FmocFF hydrogel is a promising biomaterial for bone regeneration due to its biocompatibility, mechanical properties, and ability to support osteogenesis.
• Its injectable and self-assembling nature makes it suitable for minimally invasive tissue engineering applications.