期刊论文详细信息
Biomolecules 卷:12
The Rheology and Printability of Cartilage Matrix-Only Biomaterials
Emily E. Thomas1  Michael S. Detamore2  Emi A. Kiyotake2  Michael E. Cheng2 
[1] Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA;
[2] Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, OK 73019, USA;
关键词: cartilage;    hydrogels;    rheology;    methacryloylation;    extracellular matrix;    bioprinting;   
DOI  :  10.3390/biom12060846
来源: DOAJ
【 摘 要 】

The potential chondroinductivity from cartilage matrix makes it promising for cartilage repair; however, cartilage matrix-based hydrogels developed thus far have failed to match the mechanical performance of native cartilage or be bioprinted without adding polymers for reinforcement. There is a need for cartilage matrix-based hydrogels with robust mechanical performance and paste-like precursor rheology for bioprinting/enhanced surgical placement. In the current study, our goals were to increase hydrogel stiffness and develop the paste-like precursor/printability of our methacryl-modified solubilized and devitalized cartilage (MeSDVC) hydrogels. We compared two methacryloylating reagents, methacrylic anhydride (MA) and glycidyl methacrylate (GM), and varied the molar excess (ME) of MA from 2 to 20. The MA-modified MeSDVCs had greater methacryloylation than GM-modified MeSDVC (20 ME). While GM and most of the MA hydrogel precursors exhibited paste-like rheology, the 2 ME MA and GM MeSDVCs had the best printability (i.e., shape fidelity, filament collapse). After crosslinking, the 2 ME MA MeSDVC had the highest stiffness (1.55 ± 0.23 MPa), approaching the modulus of native cartilage, and supported the viability/adhesion of seeded cells for 15 days. Overall, the MA (2 ME) improved methacryloylation, hydrogel stiffness, and printability, resulting in a stand-alone MeSDVC printable biomaterial. The MeSDVC has potential as a future bioink and has future clinical relevance for cartilage repair.

【 授权许可】

Unknown   

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