期刊
SCIENCE ADVANCES
卷 6, 期 14, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.aaz1039
关键词
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资金
- NIH [5R01EB027666, 1R21NS114549, 5R01HL142718, R01EB027171]
- Stanford Bio-X Interdisciplinary Initiative
- Coulter Foundation
- Wings for Life [WFL-US-020/14]
- Spinal Research (UK)
- Wu Tsai Neurosciences Institute at Stanford University
- Geballe Laboratory for Advanced Materials Postdoctoral Fellowship
- Wu Tsai Neurosciences Institute Interdisciplinary Postdoctoral Fellowship
- Stanford Bio-X Interdisciplinary Graduate Fellowship
- National Science Foundation [ECCS-1542152]
Transplantation of patient-derived Schwann cells is a promising regenerative medicine therapy for spinal cord injuries; however, therapeutic efficacy is compromised by inefficient cell delivery. We present a materials-based strategy that addresses three common causes of transplanted cell death: (i) membrane damage during injection, (ii) cell leakage from the injection site, and (iii) apoptosis due to loss of endogenous matrix. Using protein engineering and peptide-based assembly, we designed injectable hydrogels with modular cell-adhesive and mechanical properties. In a cervical contusion model, our hydrogel matrix resulted in a greater than 700% improvement in successful Schwann cell transplantation. The combination therapy of cells and gel significantly improved the spatial distribution of transplanted cells within the endogenous tissue. A reduction in cystic cavitation and neuronal loss were also observed with substantial increases in forelimb strength and coordination. Using an injectable hydrogel matrix, therefore, can markedly improve the outcomes of cellular transplantation therapies.
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