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Thermoreversible hydrogel scaffolds for articular cartilage engineering
John P Fisher1, Seongbong Jo, Antonios G Mikos
1Department of Orthopaedic Surgery, Center for Tissue Regeneration and Repair, School of Medicine, University of California-Davis, Research Building I, Room 2000, 4635 Second Avenue, Sacramento, CA 95817, USA.
Journal of Biomedical Materials Research. Part A
|September 16, 2004
Summary
Engineered hydrogels using poly(propylene fumarate-co-ethylene glycol) support chondrocyte function for articular cartilage repair. These temperature-responsive biomaterials show promise for developing effective cartilage tissue engineering strategies.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Articular cartilage has limited self-repair capacity, leading to joint pain and stiffness after injury.
- Current treatments often result in suboptimal fibrocartilage repair.
- Tissue engineering offers a promising approach for functional articular cartilage restoration.
Purpose of the Study:
- To evaluate the suitability of a novel temperature-responsive hydrogel, poly(propylene fumarate-co-ethylene glycol) [P(PF-co-EG)], for articular cartilage repair.
- To assess the impact of hydrogel components on the phenotype of encapsulated chondrocytes.
- To investigate chondrocyte viability, proteoglycan, and type II collagen synthesis within the hydrogel.
Main Methods:
- Development of a temperature-responsive hydrogel system, P(PF-co-EG), that gels at physiological temperatures.
- Encapsulation of bovine articular chondrocytes within the hydrogel.
- Assessment of chondrocyte viability, proteoglycan synthesis, and type II collagen synthesis.
- Evaluation of the effect of bone morphogenetic protein-7 on chondrocyte behavior.
Main Results:
- The hydrogel fabrication components did not significantly impair chondrocyte proteoglycan synthesis.
- Chondrocytes encapsulated within P(PF-co-EG) hydrogels maintained viability and synthesized proteoglycans and type II collagen.
- Bone morphogenetic protein-7 enhanced chondrocyte proliferation but not proteoglycan synthesis.
Conclusions:
- The temperature-responsive P(PF-co-EG) hydrogels are suitable for delivering chondrocytes for articular cartilage repair.
- This hydrogel system shows potential for mimicking native cartilage properties.
- Further research can advance the clinical application of these engineered hydrogels for cartilage regeneration.