Clickable Granular Hydrogel Scaffolds for Delivery of Neural Progenitor Cells to Sites of Spinal Cord Injury.

Autor: Tigner TJ; Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843-3120, USA., Dampf G; Department of Biology, Texas A&M University, College Station, TX, 77843-3258, USA., Tucker A; Department of Biology, Texas A&M University, College Station, TX, 77843-3258, USA., Huang YC; Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843-3120, USA., Jagrit V; Department of Biology, Texas A&M University, College Station, TX, 77843-3258, USA., Clevenger AJ; Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843-3120, USA., Mohapatra A; Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843-3120, USA., Raghavan SA; Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843-3120, USA., Dulin JN; Department of Biology, Texas A&M University, College Station, TX, 77843-3258, USA.; Texas A&M Institute for Neuroscience, Texas A&M University, College Station, TX, 77843-3474, USA., Alge DL; Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843-3120, USA.; Department of Materials Science and Engineering, Texas A&M University, College Station, TX, 77843-3003, USA.
Jazyk: angličtina
Zdroj: Advanced healthcare materials [Adv Healthc Mater] 2024 Oct; Vol. 13 (25), pp. e2303912. Date of Electronic Publication: 2024 Mar 24.
DOI: 10.1002/adhm.202303912
Abstrakt: Spinal cord injury (SCI) is a serious condition with limited treatment options. Neural progenitor cell (NPC) transplantation is a promising treatment option, and the identification of novel biomaterial scaffolds that support NPC engraftment and therapeutic activity is a top research priority. The objective of this study is to evaluate in situ assembled poly (ethylene glycol) (PEG)-based granular hydrogels for NPC delivery in a murine model of SCI. Microgel precursors are synthesized by using thiol-norbornene click chemistry to react four-armed PEG-amide-norbornene with enzymatically degradable and cell adhesive peptides. Unreacted norbornene groups are utilized for in situ assembly into scaffolds using a PEG-di-tetrazine linker. The granular hydrogel scaffolds exhibit good biocompatibility and do not adversely affect the inflammatory response after SCI. Moreover, when used to deliver NPCs, the granular hydrogel scaffolds supported NPC engraftment, do not adversely affect the immune response to the NPC grafts, and successfully support graft differentiation toward neuronal or astrocytic lineages as well as axonal extension into the host tissue. Collectively, these data establish PEG-based granular hydrogel scaffolds as a suitable biomaterial platform for NPC delivery and justify further testing, particularly in the context of more severe SCI.
(© 2024 The Authors. Advanced Healthcare Materials published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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