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Updated: Dec 20, 2025
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Designing Silk-silk Protein Alloy Materials for Biomedical Applications
Published on: August 13, 2014
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Thixotropic silk nanofibril-based hydrogel with extracellular matrix-like structure.
Yingxin Liu1, Shengjie Ling, Suhang Wang
1State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Laboratory of Advanced Materials, Fudan University, Shanghai, 200433, People's Republic of China. zzshao@fudan.edu.cn.
Biomaterials Science
|June 3, 2020
Summary
Injectable silk fibroin (SF) hydrogels mimic the extracellular matrix, offering robust mechanical properties and rapid self-healing. These biocompatible hydrogels show promise as carriers for cell therapy applications.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Silk fibroin (SF) materials are recognized for their advantageous structural and biological characteristics.
- SF-based materials have found extensive applications in various bio-related fields.
Purpose of the Study:
- To develop an injectable hydrogel using silk fibroin (SF) nanofibrils.
- To characterize the structural, mechanical, and biological properties of the SF hydrogel.
- To evaluate the potential of the SF hydrogel as a cell therapy carrier.
Main Methods:
- Injectable hydrogel formation via fibrillation and centrifugation of SF.
- Assessment of extracellular matrix-like structure.
- Evaluation of mechanical properties, including storage modulus (G') and thixotropic recovery.
- In vitro biocompatibility testing using L929 cells (viability and cytotoxicity assays).
Main Results:
- The SF hydrogel possesses an extracellular matrix-like structure.
- The hydrogel exhibits sufficient mechanical strength and remarkable thixotropic behavior, with 93% storage modulus recovery within 40 seconds after high shear strain.
- The injectable hydrogel demonstrated significant biocompatibility with L929 cells post-injection.
Conclusions:
- The developed SF nanofibril-based hydrogel offers promising properties for biomedical applications.
- Its injectable nature, mechanical robustness, rapid self-healing, and biocompatibility make it suitable for cell therapy delivery.
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