1
|
Diller RB, Kellar RS. An acellular tissue engineered biomimetic wound healing device created using collagen and tropoelastin accelerates wound healing. J Tissue Viability 2022; 31:485-490. [DOI: 10.1016/j.jtv.2022.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 04/01/2022] [Accepted: 04/08/2022] [Indexed: 11/17/2022]
|
2
|
Yen CM, Shen CC, Yang YC, Liu BS, Lee HT, Sheu ML, Tsai MH, Cheng WY. Novel electrospun poly(ε-caprolactone)/type I collagen nanofiber conduits for repair of peripheral nerve injury. Neural Regen Res 2019; 14:1617-1625. [PMID: 31089062 PMCID: PMC6557087 DOI: 10.4103/1673-5374.255997] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Recent studies have shown the potential of artificially synthesized conduits in the repair of peripheral nerve injury. Natural biopolymers have received much attention because of their biocompatibility. To investigate the effects of novel electrospun absorbable poly(ε-caprolactone)/type I collagen nanofiber conduits (biopolymer nanofiber conduits) on the repair of peripheral nerve injury, we bridged 10-mm-long sciatic nerve defects with electrospun absorbable biopolymer nanofiber conduits, poly(ε-caprolactone) or silicone conduits in Sprague-Dawley rats. Rat neurologica1 function was weekly evaluated using sciatic function index within 8 weeks after repair. Eight weeks after repair, sciatic nerve myelin sheaths and axon morphology were observed by osmium tetroxide staining, hematoxylin-eosin staining, and transmission electron microscopy. S-100 (Schwann cell marker) and CD4 (inflammatory marker) immunoreactivities in sciatic nerve were detected by immunohistochemistry. In rats subjected to repair with electrospun absorbable biopolymer nanofiber conduits, no serious inflammatory reactions were observed in rat hind limbs, the morphology of myelin sheaths in the injured sciatic nerve was close to normal. CD4 immunoreactivity was obviously weaker in rats subjected to repair with electrospun absorbable biopolymer nanofiber conduits than in those subjected to repair with poly(ε-caprolactone) or silicone. Rats subjected to repair with electrospun absorbable biopolymer nanofiber conduits tended to have greater sciatic nerve function recovery than those receiving poly(ε-caprolactone) or silicone repair. These results suggest that electrospun absorbable poly(ε-caprolactone)/type I collagen nanofiber conduits have the potential of repairing sciatic nerve defects and exhibit good biocompatibility. All experimental procedures were approved by Institutional Animal Care and Use Committee of Taichung Veteran General Hospital, Taiwan, China (La-1031218) on October 2, 2014.
Collapse
Affiliation(s)
- Chun-Ming Yen
- Department of Neurosurgery, Neurological Institute, Taichung Veterans General Hospital; Ph.D. Program in Translational Medicine, National Chung Hsing University, Taichung, Taiwan, China
| | - Chiung-Chyi Shen
- Department of Neurosurgery, Neurological Institute, Taichung Veterans General Hospital; Department of Physical Therapy, Hungkuang University; Basic Medical Education Center, Central Taiwan University of Science and Technology, Taichung, Taiwan, China
| | - Yi-Chin Yang
- Department of Neurosurgery, Neurological Institute, Taichung Veterans General Hospital, Taichung, Taiwan, China
| | - Bai-Shuan Liu
- Department of Medical Imaging and Radiological Sciences, Central Taiwan University of Science and Technology, Taichung, Taiwan, China
| | - Hsu-Tung Lee
- Department of Neurosurgery, Neurological Institute, Taichung Veterans General Hospital, Taichung, Taiwan, China
| | - Meei-Ling Sheu
- Institute of Biomedical Sciences, National Chung Hsing University; Department of Medical Research, Taichung Veterans General Hospital; Rong Hsing Research Center for Translational Medicine, National Chung Hsing University, Taichung, Taiwan, China
| | - Meng-Hsiun Tsai
- Department of Management Information System, National Chung Hsing University, Taichung, Taiwan, China
| | - Wen-Yu Cheng
- Department of Neurosurgery, Neurological Institute, Taichung Veterans General Hospital; Department of Physical Therapy, Hungkuang University, Taichung, Taiwan, China
| |
Collapse
|
3
|
Shojaee M, Swaminathan G, Bashur CA, Ramamurthi A. Temporal changes in peritoneal cell phenotype and neoelastic matrix induction with hyaluronan oligomers and TGF-β1 after implantation of engineered conduits. J Tissue Eng Regen Med 2018; 12:1420-1431. [PMID: 29701914 DOI: 10.1002/term.2674] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 01/19/2018] [Accepted: 04/12/2018] [Indexed: 12/26/2022]
Abstract
The neoassembly and maturation of elastic matrix is an important challenge for engineering small-diameter grafts for patients with peripheral artery disease. We have previously shown that hyaluronan oligomers and transforming growth factor-β (elastogenic factors or EFs) promote elastogenesis in smooth muscle cell (SMC) culture. However, their combined effects on macrophages and inflammatory cells in vivo are unknown. This information is needed to use the body (e.g., peritoneal cavity) as an "in vivo bioreactor" to recruit autologous cells to implanted EF-functionalized scaffolds. In this study, we determined if peritoneal fluid cells respond to EFs like smooth muscle cells and if these responses differ between cells sourced during different stages of inflammation triggered by scaffold implantation. Electrospun poly(ε-caprolactone)/collagen conduits were implanted in the peritoneal cavity prior to peritoneal fluid collection at 3-42 days postimplantation. Cells from the fluid were cultured in vitro with and without EFs to determine their response. Their phenotype/behaviour was assessed with a DNA assay, quantitative real-time PCR, and immunofluorescence. The EFs reduced peritoneal cell proliferation, maintained cell contractility, and unexpectedly did not exhibit proelastic effects, which we attributed to differences in cell density. We found the greatest elastin deposition in regions containing a high cell density. Further, we found that cells isolated from the peritoneal cavity at longer times after conduit implantation responded better to the EFs and exhibited more CD31 expression than cells at an earlier time point. Overall, this study provides information about the potential use of EFs in vivo and can guide the design of future tissue-engineered vascular grafts.
Collapse
Affiliation(s)
- Mozhgan Shojaee
- Department of Biomedical Engineering, Florida Institute of Technology, Melbourne, FL, USA
| | - Ganesh Swaminathan
- Department of Biomedical Engineering, Cleveland Clinic, Cleveland, OH, USA
| | - Chris A Bashur
- Department of Biomedical Engineering, Florida Institute of Technology, Melbourne, FL, USA
| | - Anand Ramamurthi
- Department of Biomedical Engineering, Cleveland Clinic, Cleveland, OH, USA
| |
Collapse
|
4
|
Gao W, Sun L, Fu X, Lin Z, Xie W, Zhang W, Zhao F, Chen X. Enhanced diabetic wound healing by electrospun core–sheath fibers loaded with dimethyloxalylglycine. J Mater Chem B 2018; 6:277-288. [DOI: 10.1039/c7tb02342a] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
DMOG-loaded nanofibrous wound dressings enhanced diabetic wound healing by stabilizing HIF-1α.
Collapse
Affiliation(s)
- W. Gao
- The School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
- National Engineering Research Center for Tissue Restoration and Reconstruction
| | - L. Sun
- The School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
- National Engineering Research Center for Tissue Restoration and Reconstruction
| | - X. Fu
- The School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
- National Engineering Research Center for Tissue Restoration and Reconstruction
| | - Z. Lin
- Department of Orthopedics
- Guangzhou General Hospital of Guangzhou Military Command
- Guangzhou
- China
- Guangdong Key Laboratory of Orthopedic Technology and Implant Materials
| | - W. Xie
- The School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
- National Engineering Research Center for Tissue Restoration and Reconstruction
| | - W. Zhang
- The School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
- National Engineering Research Center for Tissue Restoration and Reconstruction
| | - F. Zhao
- The School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
- National Engineering Research Center for Tissue Restoration and Reconstruction
| | - X. Chen
- The School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
- National Engineering Research Center for Tissue Restoration and Reconstruction
| |
Collapse
|
5
|
Peritoneal pre-conditioning reduces macrophage marker expression in collagen-containing engineered vascular grafts. Acta Biomater 2017; 64:80-93. [PMID: 28987784 DOI: 10.1016/j.actbio.2017.10.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 09/16/2017] [Accepted: 10/04/2017] [Indexed: 02/08/2023]
Abstract
Engineered vascular grafts have shown promise as arteriovenous shunts, but they have not yet progressed to clinical trials for coronary arteries <4 mm in diameter such as the coronary arteries. Control over initial biomaterial properties and remodeling are necessary to generate viable grafts. In this study, we blended collagen with a synthetic material, poly(ε-caprolactone), to modulate the post-grafting inflammatory response while avoiding aneurysmal-like dilation and failure that can occur with pure collagen grafts. We also used pre-implantation in an "in vivo bioreactor" to recruit autologous cells and improve patency after grafting. Electrospun conduits were pre-implanted within rat peritoneal cavities and then grafted autologously into abdominal aortae. Conduit collagen percentages and pre-implantation were tested for their impact on graft remodeling and patency. Burst pressures >2000 mmHg, reproducible expansion with systole/diastole, and maintenance of mechanical integrity were observed. More importantly, peritoneal pre-implantation reduced overall lipid oxidation, intimal layer thickness, and expression of an M1 macrophage marker. The condition with the most collagen, 25%, exhibited the lowest expression of macrophage markers but also resulted in a thicker intimal layer. Overall, the 10% collagen/PCL with peritoneal pre-implantation condition appeared to exhibit the best combination of responses, and may result in improved clinical graft viability. STATEMENT OF SIGNIFICANCE This manuscript describes a rodent study to systematically determine the benefits of both pre-implantation in the peritoneal cavity and specific ratios of collagen on engineered vascular graft viability. We show that pre-implantation had a significant benefit, including decreasing the expression of macrophage markers and reducing lipid oxidation after grafting. This study is the first time that the benefits of peritoneal pre-implantation have been compared to an "off the shelf," directly grafted control condition. We also demonstrated the importance of specific collagen ratio on the response after grafting. Overall, we feel that this article will be of interest to the field and it has the potential to address a significant clinical need: a graft for coronary arteries <4 mm in diameter.
Collapse
|
6
|
Shojaee M, Bashur CA. Compositions Including Synthetic and Natural Blends for Integration and Structural Integrity: Engineered for Different Vascular Graft Applications. Adv Healthc Mater 2017; 6. [PMID: 28371505 DOI: 10.1002/adhm.201700001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2017] [Revised: 02/13/2017] [Indexed: 11/07/2022]
Abstract
Tissue engineering approaches for small-diameter arteries require a scaffold that simultaneously maintains patency by preventing thrombosis and intimal hyperplasia, maintains its structural integrity after grafting, and allows integration. While synthetic and extracellular matrix-derived materials can provide some of these properties individually, developing a scaffold that provides the balanced properties needed for vascular graft survival in the clinic has been particularly challenging. After 30 years of research, there are now several scaffolds currently in clinical trials. However, these products are either being investigated for large-diameter applications or they require pre-seeding of endothelial cells. This progress report identifies important challenges unique to engineering vascular grafts for high pressure arteries less than 4 mm in diameter (e.g., coronary artery), and discusses limitations with the current usage of the term "small-diameter." Next, the composition and processing techniques used for generating tissue engineered vascular grafts (TEVGs) are discussed, with a focus on the benefits of blended materials. Other scaffolds for non-tissue engineering approaches and stents are also briefly mentioned for comparison. Overall, this progress report discusses the importance of defining the most critical challenges for small diameter TEVGs, developing new scaffolds to provide these properties, and determining acceptable benchmarks for scaffold responses in the body.
Collapse
|
7
|
Birthare K, Shojaee M, Jones CG, Brenner JR, Bashur CA. Collagen incorporation within electrospun conduits reduces lipid oxidation and impacts conduit mechanics. Biomed Mater 2016; 11:025019. [DOI: 10.1088/1748-6041/11/2/025019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
8
|
Swaminathan G, Sivaraman B, Moore L, Zborowski M, Ramamurthi A. Magnetically Responsive Bone Marrow Mesenchymal Stem Cell-Derived Smooth Muscle Cells Maintain Their Benefits to Augmenting Elastic Matrix Neoassembly. Tissue Eng Part C Methods 2016; 22:301-11. [PMID: 26830683 DOI: 10.1089/ten.tec.2015.0349] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Abdominal aortic aneurysms (AAA) represent abnormal aortal expansions that result from chronic proteolytic breakdown of elastin and collagen fibers by matrix metalloproteases. Poor elastogenesis by adult vascular smooth muscle cells (SMCs) limits regenerative repair of elastic fibers, critical for AAA growth arrest. Toward overcoming these limitations, we recently demonstrated significant elastogenesis by bone marrow mesenchymal stem cell-derived SMCs (BM-SMCs) and their proelastogenesis and antiproteolytic effects on rat aneurysmal SMCs (EaRASMCs). We currently investigate the effects of super paramagnetic iron oxide nanoparticle (SPION) labeling of BM-SMCs, necessary to magnetically guide them to the AAA wall, on their functional benefits. Our results indicate that SPION-labeling is noncytotoxic and does not adversely impact the phenotype and elastogenesis by BM-SMCs. In addition, SPION-BM-SMCs showed no changes in the ability of the BM-SMCs to stimulate elastin regeneration and attenuate proteolytic activity by EaRASMCs. Together, our results are promising toward the utility of SPIONs for magnetic targeting of BM-SMCs for in situ AAA regenerative repair.
Collapse
Affiliation(s)
- Ganesh Swaminathan
- 1 Department of Biomedical Engineering, Cleveland Clinic , Cleveland, Ohio.,2 Department of Biology, University of Akron , Akron, Ohio
| | | | - Lee Moore
- 1 Department of Biomedical Engineering, Cleveland Clinic , Cleveland, Ohio
| | - Maciej Zborowski
- 1 Department of Biomedical Engineering, Cleveland Clinic , Cleveland, Ohio
| | - Anand Ramamurthi
- 1 Department of Biomedical Engineering, Cleveland Clinic , Cleveland, Ohio
| |
Collapse
|
9
|
Swaminathan G, Gadepalli VS, Stoilov I, Mecham RP, Rao RR, Ramamurthi A. Pro-elastogenic effects of bone marrow mesenchymal stem cell-derived smooth muscle cells on cultured aneurysmal smooth muscle cells. J Tissue Eng Regen Med 2014; 11:679-693. [DOI: 10.1002/term.1964] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 08/18/2014] [Accepted: 09/25/2014] [Indexed: 01/09/2023]
Affiliation(s)
- Ganesh Swaminathan
- Department of Biomedical Engineering; Cleveland Clinic; Cleveland OH USA
- Department of Biology; University of Akron; Akron OH USA
| | - Venkat S. Gadepalli
- Department of Chemical and Life Science Engineering; Virginia Commonwealth University; Richmond VA USA
| | - Ivan Stoilov
- Department of Cell Biology and Physiology; Washington University; St. Louis MO USA
| | - Robert P. Mecham
- Department of Cell Biology and Physiology; Washington University; St. Louis MO USA
| | - Raj R. Rao
- Department of Chemical and Life Science Engineering; Virginia Commonwealth University; Richmond VA USA
| | - Anand Ramamurthi
- Department of Biomedical Engineering; Cleveland Clinic; Cleveland OH USA
- Department of Biology; University of Akron; Akron OH USA
| |
Collapse
|