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Wang Y, Xue F, Li Y, Lin L, Wang Y, Zhao S, Zhao X, Liu Y, Tan J, Li G, Xiao H, Yan J, Tian H, Liu M, Zhang Q, Ba Z, He L, Zhao W, Zhu C, Zeng W. Programming of Regulatory T Cells In Situ for Nerve Regeneration and Long-Term Patency of Vascular Grafts. Research (Wash D C) 2022; 2022:9826426. [PMID: 35966759 PMCID: PMC9351587 DOI: 10.34133/2022/9826426] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Accepted: 06/22/2022] [Indexed: 11/25/2022] Open
Abstract
Rapid integration into the host tissue is critical for long-term patency after small diameter tissue engineering vascular grafts (sdTEVGs) transplantation. Neural recognition may be required for host integration and functionalization of the graft. However, immune rejection and inflammation hinder nerve regeneration of sdTEVGs. Here, a CRISPR/dCas9-nanocarrier was used for targeted programming of regulatory T cells (Treg cells) in situ to promote nerve regeneration of sdTEVGs by preventing excessive inflammation. Treg cells and (C-C chemokine receptor) CCR2+ macrophage recruitment occurred after transplantation. The nanodelivery system upregulated ten eleven translocation (TET2) in Treg cells in vitro. Reprogrammed Treg cells upregulated anti-inflammatory cytokines and decreased the proportion of CCR2+ macrophages. IL-6 concentrations decreased to the levels required for nerve regeneration. Implantation of CRISPR/dCas9 nanodelivery system-modified sdTEVGs in rats resulted in Treg cell editing, control of excessive inflammation, and promoted nerve regeneration. After 3 months, nerve regeneration was similar to that observed in normal blood vessels; good immune homeostasis, consistency of hemodynamics, and matrix regeneration were observed. Neural recognition promotes further integration of the graft into the host, with unobstructed blood vessels without intimal hyperplasia. Our findings provide new insights into vascular implant functionalization by the host.
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Affiliation(s)
- Yanhong Wang
- Department of Cell Biology, Third Military Army Medical University, Chongqing 400038, China
| | - Fangchao Xue
- Department of Cell Biology, Third Military Army Medical University, Chongqing 400038, China
| | - Yanzhao Li
- Department of Anatomy, National and Regional Engineering Laboratory of Tissue Engineering, State and Local Joint Engineering Laboratory for Vascular Implants, Key Lab for Biomechanics and Tissue Engineering of Chongqing, Third Military Medical University, Chongqing 400038, China
| | - Lin Lin
- Department of Cell Biology, Third Military Army Medical University, Chongqing 400038, China
| | - Yeqin Wang
- Department of Cell Biology, Third Military Army Medical University, Chongqing 400038, China
| | - Shanlan Zhao
- Department of Cell Biology, Third Military Army Medical University, Chongqing 400038, China
| | - Xingli Zhao
- Department of Cell Biology, Third Military Army Medical University, Chongqing 400038, China
| | - Yong Liu
- Department of Anatomy, National and Regional Engineering Laboratory of Tissue Engineering, State and Local Joint Engineering Laboratory for Vascular Implants, Key Lab for Biomechanics and Tissue Engineering of Chongqing, Third Military Medical University, Chongqing 400038, China
| | - Ju Tan
- Department of Anatomy, National and Regional Engineering Laboratory of Tissue Engineering, State and Local Joint Engineering Laboratory for Vascular Implants, Key Lab for Biomechanics and Tissue Engineering of Chongqing, Third Military Medical University, Chongqing 400038, China
| | - Gang Li
- Department of Anatomy, National and Regional Engineering Laboratory of Tissue Engineering, State and Local Joint Engineering Laboratory for Vascular Implants, Key Lab for Biomechanics and Tissue Engineering of Chongqing, Third Military Medical University, Chongqing 400038, China
| | - Haoran Xiao
- Department of Cell Biology, Third Military Army Medical University, Chongqing 400038, China
| | - Juan Yan
- Department of Cell Biology, Third Military Army Medical University, Chongqing 400038, China
| | - Hao Tian
- Department of Cell Biology, Third Military Army Medical University, Chongqing 400038, China
| | - Min Liu
- Department of Cell Biology, Third Military Army Medical University, Chongqing 400038, China
| | - Qiao Zhang
- Department of Cell Biology, Third Military Army Medical University, Chongqing 400038, China
| | - Zhaojing Ba
- Department of Cell Biology, Third Military Army Medical University, Chongqing 400038, China
| | - Lang He
- Department of Cell Biology, Third Military Army Medical University, Chongqing 400038, China
| | - Wenyan Zhao
- Department of Cell Biology, Third Military Army Medical University, Chongqing 400038, China
| | - Chuhong Zhu
- Department of Anatomy, National and Regional Engineering Laboratory of Tissue Engineering, State and Local Joint Engineering Laboratory for Vascular Implants, Key Lab for Biomechanics and Tissue Engineering of Chongqing, Third Military Medical University, Chongqing 400038, China
| | - Wen Zeng
- Department of Cell Biology, Third Military Army Medical University, Chongqing 400038, China
- State Key Laboratory of Trauma, Burn and Combined Injury, Chongqing, China
- Departments of Neurology, Southwest Hospital, Third Military Medical University, Chongqing, China
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