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Das A, Nikhil A, Kumar A. Antioxidant and Trilayered Electrospun Small-Diameter Vascular Grafts Maintain Patency and Promote Endothelialisation in Rat Femoral Artery. ACS Biomater Sci Eng 2024; 10:1697-1711. [PMID: 38320085 DOI: 10.1021/acsbiomaterials.4c00006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
Vascular grafts with a small diameter encounter inadequate patency as a result of intimal hyperplasia development. In the current study, trilayered electrospun small-diameter vascular grafts (PU-PGACL + GA) were fabricated using a poly(glycolic acid) and poly(caprolactone) blend as the middle layer and antioxidant polyurethane with gallic acid as the innermost and outermost layers. The scaffolds exhibited good biocompatibility and mechanical properties, as evidenced by their 6 MPa elastic modulus, 4 N suture retention strength, and 2500 mmHg burst pressure. Additionally, these electrospun grafts attenuated cellular oxidative stress and demonstrated minimal hemolysis (less than 1%). As a proof-of-concept, the preclinical evaluation of the grafts was carried out in the femoral artery of rodents, where the conduits demonstrated satisfactory patency. After 35 days of implantation, ultrasound imaging depicted adequate blood flow through the grafts, and the computed vessel diameter and histological staining showed no significant stenosis issue. Immunohistochemical analysis confirmed matrix deposition (38% collagen I and 16% elastin) and cell infiltration (42% for endothelial cells and 55% for smooth muscle cells) in the explanted grafts. Therefore, PU-PGACL + GA showed characteristics of a clinically relevant small-diameter vascular graft, facilitating re-endothelialization while preserving the anticoagulant properties of the synthetic blood vessels.
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Affiliation(s)
- Ankita Das
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016, U.P., India
| | - Aman Nikhil
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016, U.P., India
| | - Ashok Kumar
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016, U.P., India
- Centre for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, U.P., India
- The Mehta Family Centre for Engineering in Medicine, Indian Institute of Technology Kanpur, Kanpur 208016, U.P., India
- Centre of Excellence in Orthopaedics and Prosthetics, Gangwal School of Medical Sciences and Technology, Indian Institute of Technology Kanpur, Kanpur 208016, U.P., India
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Shi J, Teng Y, Li D, He J, Midgley AC, Guo X, Wang X, Yang X, Wang S, Feng Y, Lv Q, Hou S. Biomimetic tri-layered small-diameter vascular grafts with decellularized extracellular matrix promoting vascular regeneration and inhibiting thrombosis with the salidroside. Mater Today Bio 2023; 21:100709. [PMID: 37455822 PMCID: PMC10339197 DOI: 10.1016/j.mtbio.2023.100709] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 05/20/2023] [Accepted: 06/16/2023] [Indexed: 07/18/2023] Open
Abstract
Small-diameter vascular grafts (SDVGs) are urgently required for clinical applications. Constructing vascular grafts mimicking the defining features of native arteries is a promising strategy. Here, we constructed a tri-layered vascular graft with a native artery decellularized extracellular matrix (dECM) mimicking the component of arteries. The porcine thoracic aorta was decellularized and milled into dECM powders from the differential layers. The intima and media dECM powders were blended with poly (L-lactide-co-caprolactone) (PLCL) as the inner and middle layers of electrospun vascular grafts, respectively. Pure PLCL was electrospun as a strengthening sheath for the outer layer. Salidroside was loaded into the inner layer of vascular grafts to inhibit thrombus formation. In vitro studies demonstrated that dECM provided a bioactive milieu for human umbilical vein endothelial cell (HUVEC) extension adhesion, proliferation, migration, and tube-forming. The in vivo studies showed that the addition of dECM could promote endothelialization, smooth muscle regeneration, and extracellular matrix deposition. The salidroside could inhibit thrombosis. Our study mimicked the component of the native artery and combined it with the advantages of synthetic polymer and dECM which provided a promising strategy for the design and construction of SDVGs.
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Affiliation(s)
- Jie Shi
- Wenzhou Safety (Emergency) Institute of Tianjin University, Wenzhou, 325026, China
- Institute of Disaster and Emergency Medicine, Tianjin University, Tianjin, 300072, China
- Key Laboratory for Disaster Medicine Technology, Tianjin, 300072, China
| | - Yanjiao Teng
- Wenzhou Safety (Emergency) Institute of Tianjin University, Wenzhou, 325026, China
- Institute of Disaster and Emergency Medicine, Tianjin University, Tianjin, 300072, China
- Key Laboratory for Disaster Medicine Technology, Tianjin, 300072, China
| | - Duo Li
- Wenzhou Safety (Emergency) Institute of Tianjin University, Wenzhou, 325026, China
- Institute of Disaster and Emergency Medicine, Tianjin University, Tianjin, 300072, China
- Key Laboratory for Disaster Medicine Technology, Tianjin, 300072, China
| | - Ju He
- Vascular Surgery, Tianjin First Central Hospital, Tianjin, 300192, China
| | - Adam C. Midgley
- Key Laboratory of Bioactive Materials for the Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Xiaoqin Guo
- Wenzhou Safety (Emergency) Institute of Tianjin University, Wenzhou, 325026, China
- Institute of Disaster and Emergency Medicine, Tianjin University, Tianjin, 300072, China
- Key Laboratory for Disaster Medicine Technology, Tianjin, 300072, China
| | - Xiudan Wang
- Wenzhou Safety (Emergency) Institute of Tianjin University, Wenzhou, 325026, China
- Institute of Disaster and Emergency Medicine, Tianjin University, Tianjin, 300072, China
- Key Laboratory for Disaster Medicine Technology, Tianjin, 300072, China
| | - Xinran Yang
- Wenzhou Safety (Emergency) Institute of Tianjin University, Wenzhou, 325026, China
- Institute of Disaster and Emergency Medicine, Tianjin University, Tianjin, 300072, China
- Key Laboratory for Disaster Medicine Technology, Tianjin, 300072, China
| | - Shufang Wang
- Key Laboratory of Bioactive Materials for the Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Yakai Feng
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
- Frontiers Science Center for Synthetic Biology, Tianjin University, 30072, China
- Key Laboratory of Systems Bioengineering (MOE), Tianjin University, 30072, China
| | - Qi Lv
- Wenzhou Safety (Emergency) Institute of Tianjin University, Wenzhou, 325026, China
- Institute of Disaster and Emergency Medicine, Tianjin University, Tianjin, 300072, China
- Key Laboratory for Disaster Medicine Technology, Tianjin, 300072, China
| | - Shike Hou
- Wenzhou Safety (Emergency) Institute of Tianjin University, Wenzhou, 325026, China
- Institute of Disaster and Emergency Medicine, Tianjin University, Tianjin, 300072, China
- Key Laboratory for Disaster Medicine Technology, Tianjin, 300072, China
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