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Protease-degradable hydrogels with multifunctional biomimetic peptides for bone tissue engineering
Lluís Oliver-Cervelló1,2, Helena Martin-Gómez1,2, Cristina Gonzalez-Garcia3
1Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Engineering, Universitat Politècnica de Catalunya (UPC), Barcelona, Spain.
New biomimetic hydrogels mimic bone extracellular matrix (ECM) for tissue engineering. These advanced materials promote human mesenchymal stem cell (MSC) spreading and osteogenic differentiation, offering potential for bone regeneration therapies.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Mimicking the bone extracellular matrix (ECM) is crucial for developing effective bone tissue engineering biomaterials.
- Combining integrin-binding ligands and osteogenic peptides can recreate the bone's healing microenvironment.
Purpose of the Study:
- To design and characterize novel polyethylene glycol (PEG)-based hydrogels functionalized with multifunctional biomimetic peptides.
- To evaluate the hydrogels' suitability for bone tissue engineering by assessing their properties and ability to support cell behavior.
Main Methods:
- PEG-based hydrogels were synthesized and functionalized with cyclic RGD-DWIVA or cyclic RGD-cyclic DWIVA peptides.
- Hydrogels were cross-linked with matrix metalloproteinases (MMPs)-degradable sequences for enzymatic biodegradation.
- Mechanical properties, porosity, swelling, and degradability were analyzed.
- Human mesenchymal stem cells (MSCs) were cultured on the hydrogels to assess cell spreading and osteogenic differentiation.
Main Results:
- The engineered hydrogels exhibited suitable mechanical properties, porosity, swelling, and degradability for bone tissue engineering.
- The hydrogels successfully promoted human MSC spreading.
- Significant enhancement of MSC osteogenic differentiation was observed in the engineered hydrogels.
Conclusions:
- The developed PEG-based hydrogels, functionalized with biomimetic peptides and MMPs-degradable sequences, show promise for bone tissue engineering.
- These hydrogels can support cell spreading and osteogenic differentiation, making them suitable for applications like acellular bone regeneration or stem cell therapy.
