期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 21, 页码 24463-24476出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c03821
关键词
cellular response to material; cell niche manipulation; imine bonding; viscoelasticity; biomedical application; hildrogel
资金
- National Natural Science Foundation of China [51873119, 51973132, 51673128]
- China Postdoctoral Science Foundation [2020M683312]
This study investigates the interaction between neurons and viscoelastic matrix, revealing that matrix viscoelasticity has significant effects on neuronal responses. Additionally, difunctional hyaluronan-collagen hydrogels prepared by a static-dynamic strategy show potential applications in neural cell research.
Viscoelasticity, a time-scale mechanical feature of the native extracellular matrix (ECM), is reported to play crucial roles in plentiful cellular behaviors, whereas its effects on neuronal behavior and the underlying molecular mechanism still remain obscure. Challenges are faced in the biocompatible synthesis of neural ECM-mimicked scaffolds solely controlled with viscoelasticity and due to the lack of suitable models for neurons-viscoelastic matrix interaction. Herein, we report difunctional hyaluronan-collagen hydrogels prepared by a static-dynamic strategy. The hydrogels show aldehyde concentration-dependent viscoelasticity and similar initial elastic modulus, fibrillar morphology, swelling as well as degradability. Utilizing the resulting hydrogels, for the first time, we demonstrate matrix viscoelasticity-dependent neuronal responses, including neurite elongation and expression of neurogenic proteins. Then, a motor-clutch model modified with a tension dissipation component is developed to account for the molecular mechanism for viscoelasticity-sensitive neuronal responses. Moreover, we prove enhanced recovery of rat spinal cord injury by implanting cell-free viscoelastic grafts. As a pioneer finding on neurons-viscoelastic matrix interaction both in vitro and in vivo, this work provides intriguing insights not only into nerve repair but also into neuroscience and tissue engineering.
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