1
|
Nambi Gowri K, King MW. Mechanical fabrication and evaluation of bioresorbable barbed sutures with different barb geometries. Biomed Mater 2024. [PMID: 38387053 DOI: 10.1088/1748-605x/ad2c1e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
Bioresorbable polymeric sutures are gaining interest from surgeons and patients as they reduce surgical stress and trauma. This study involves two bioresorbable polymers, namely, catgut and poly(4-hyrdorxybutyrate) (P4HB) that are used widely in cosmetic procedures. P4HB barbed sutures are favorably used in rhytidectomy (micro-facelifts) procedures while catgut sutures are widely used for external wound closure after surgical interventions. This study involves the mechanical fabrication of catgut and P4HB barbed sutures and compares their mechanical and anchoring properties. Barbed sutures were fabricated with two different barb geometries namely, straight and curved barbs. The mechanical properties were evaluated via tensile testing, and the anchoring performance was studied by means of a suture-tissue pull-out protocol using porcine dermis tissue which was harvested from the medial dorsal site. The fabricated barbed sutures of both materials showed a similar trend compared to non-barbed sutures of decreases in failure stress, strain at failure, and work to rupture or toughness which was reduced by about 70%. At the same time there was a 15% increase in the initial modulus or stiffness of the barbed sutures. The pull-out force for the barbed sutures with straight barbs was similar for both P4HB (5.04±0.8N) and catgut (4.47±3.8N), and as expected, were higher than that of non-barbed sutures of the same size. It was also observed that barbed sutures with curved barbs also required a higher pull-out force than those sutures with straight barbs. It was concluded that by barbing sutures with different barb shapes and geometries, a range of barbed suture products could be fabricated, each meeting the closure requirements for different types of tissue and therefore being suitable for different surgical procedures.
Collapse
Affiliation(s)
- Karuna Nambi Gowri
- Dept. of Textile Engineering, Chemistry and Sciences, NC State University Wilson College of Textiles, 1020 Main Campus Dr, Raleigh, North Carolina, 27695-8301, UNITED STATES
| | - Martin W King
- Dept. of Textile Engineering, Chemistry and Sciences, NC State University Wilson College of Textiles, 1020 Main Campus Dr, Raleigh, North Carolina, 27695-8301, UNITED STATES
| |
Collapse
|
2
|
Chen J, Tang X, Wang Z, Perez A, Yao B, Huang K, Zhang Y, King MW. Techniques for navigating postsurgical adhesions: Insights into mechanisms and future directions. Bioeng Transl Med 2023; 8:e10565. [PMID: 38023705 PMCID: PMC10658569 DOI: 10.1002/btm2.10565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/27/2023] [Accepted: 06/01/2023] [Indexed: 12/01/2023] Open
Abstract
Postsurgical adhesions are a common complication of surgical procedures that can lead to postoperative pain, bowel obstruction, infertility, as well as complications with future procedures. Several agents have been developed to prevent adhesion formation, such as barriers, anti-inflammatory and fibrinolytic agents. The Food and Drug Administration (FDA) has approved the use of physical barrier agents, but they have been associated with conflicting clinical studies and controversy in the clinical utilization of anti-adhesion barriers. In this review, we summarize the human anatomy of the peritoneum, the pathophysiology of adhesion formation, the current prevention agents, as well as the current research progress on adhesion prevention. The early cellular events starting with injured mesothelial cells and incorporating macrophage response have recently been found to be associated with adhesion formation. This may provide the key component for developing future adhesion prevention methods. The current use of physical barriers to separate tissues, such as Seprafilm®, composed of hyaluronic acid and carboxymethylcellulose, can only reduce the risk of adhesion formation at the end stage. Other anti-inflammatory or fibrinolytic agents for preventing adhesions have only been studied within the context of current research models, which is limited by the lack of in-vitro model systems as well as in-depth study of in-vivo models to evaluate the efficiency of anti-adhesion agents. In addition, we explore emerging therapies, such as gene therapy and stem cell-based approaches, that may offer new strategies for preventing adhesion formation. In conclusion, anti-adhesion agents represent a promising approach for reducing the burden of adhesion-related complications in surgical patients. Further research is needed to optimize their use and develop new therapies for this challenging clinical problem.
Collapse
Affiliation(s)
- Jiahui Chen
- Department of Textile Engineering, Chemistry and ScienceNorth Carolina State UniversityRaleighNorth CarolinaUSA
| | - Xiaoqi Tang
- Department of Textile Engineering, Chemistry and ScienceNorth Carolina State UniversityRaleighNorth CarolinaUSA
| | - Ziyu Wang
- Department of Textile Engineering, Chemistry and ScienceNorth Carolina State UniversityRaleighNorth CarolinaUSA
| | - Arielle Perez
- UNC School of Medicine Department of SurgeryUniversity of North CarolinaChapel HillNorth CarolinaUSA
| | - Benjamin Yao
- Montefiore Medical Center Department of Obstetrics & Gynecology & Women's Health ServicesMontefiore Medical CenterBronxNew YorkUSA
| | - Ke Huang
- Joint Department of Biomedical EngineeringNorth Carolina State University & University of North Carolina at Chapel HillRaleighNorth CarolinaUSA
- Department of Molecular Biomedical SciencesNorth Carolina State UniversityRaleighNorth CarolinaUnited States
| | - Yang Zhang
- Department of Textile Engineering, Chemistry and ScienceNorth Carolina State UniversityRaleighNorth CarolinaUSA
| | - Martin W. King
- Department of Textile Engineering, Chemistry and ScienceNorth Carolina State UniversityRaleighNorth CarolinaUSA
- College of Textiles, Donghua UniversityShanghaiSongjiangChina
| |
Collapse
|
3
|
Deshpande MV, Girase A, King MW. Degradation of Poly(ε-caprolactone) Resorbable Multifilament Yarn under Physiological Conditions. Polymers (Basel) 2023; 15:3819. [PMID: 37765673 PMCID: PMC10536568 DOI: 10.3390/polym15183819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/05/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
Poly(ε-caprolactone) (PCL) is a hydrophobic, resorbable aliphatic polymer recognized for its low tenacity and extensive elongation at break, making it a popular choice for fabricating biodegradable tissue engineering scaffolds. PCL's slow degradation rate typically results in a complete resorption period of 2 to 3 years. While numerous studies have examined the degradation of PCL in various forms such as films and webs, no study to date has investigated its physiological degradation in multifilament yarn form. In this study, we subjected PCL multifilament yarn samples to physiological conditions in phosphate-buffered saline (PBS) maintained at a consistent temperature of 37 ± 2 °C and agitated at 45 rpm for a period of 32 weeks. We retrieved samples at five different intervals to analyze the degradation profile of the multifilament yarn. This allowed us to estimate the complete resorption time and rate under these in vitro conditions. Over the 32-week period, the multifilament yarn's mass decreased by 4.8%, its elongation at break declined by 42%, the tenacity dropped by 40%, and the peak load at break fell by 46.5%. Based on these findings, we predict that a scaffold structure incorporating PCL multifilament yarn would undergo complete resorption in approximately 14 months under physiological conditions, such as in PBS solution at a pH of approximately 7 and a temperature of 37 °C.
Collapse
Affiliation(s)
- Monica V Deshpande
- Wilson College of Textiles, North Carolina State University, Raleigh, NC 27606, USA
| | - Arjunsing Girase
- Wilson College of Textiles, North Carolina State University, Raleigh, NC 27606, USA
| | - Martin W King
- Wilson College of Textiles, North Carolina State University, Raleigh, NC 27606, USA
- College of Textiles, Donghua University, Shanghai 201620, China
| |
Collapse
|
4
|
Zhang F, Gluck JM, Brown AC, Zaharoff DA, King MW. Heparin Affinity-Based IL-4 Delivery to Modulate Macrophage Phenotype and Endothelial Cell Activity In Vitro. ACS Appl Mater Interfaces 2023. [PMID: 37272781 DOI: 10.1021/acsami.3c00489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Macrophages play a pivotal role in wound healing and tissue regeneration, as they are rapidly recruited to the site of injury or implanted foreign material. Depending on their interaction with the material, macrophages can develop different phenotypes, with the M1 pro-inflammatory and M2 pro-regenerative phenotypes being highly involved in tissue regeneration. M2 macrophages mitigate inflammation and promote tissue regeneration and extracellular matrix remodeling. In this study, we engineered a gelatin-heparin-methacrylate (GelMA-HepMA) hydrogel that gradually releases interleukin-4 (IL-4), a cytokine that modulates macrophages to adopt the M2 phenotype. Methacrylation of heparin improved the retention of both heparin and IL-4 within the hydrogel. The GelMA-HepMA hydrogel and IL-4 synergistically downregulated M1 gene expression and upregulated M2 gene expression in macrophages within 48 h of in vitro cell culture. However, the M2-like macrophage phenotype induced by the GelMA-HepMA-IL-4 hydrogel did not necessarily further improve endothelial cell proliferation and migration in vitro.
Collapse
Affiliation(s)
- Fan Zhang
- Wilson College of Textiles, North Carolina State University, Raleigh, North Carolina 27606, United States
| | - Jessica M Gluck
- Wilson College of Textiles, North Carolina State University, Raleigh, North Carolina 27606, United States
| | - Ashley C Brown
- Joint Department of Biomedical Engineering of University of North Carolina, Chapel Hill and North Carolina State University, Raleigh, North Carolina 27695, United States
- Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina 27606, United States
| | - David A Zaharoff
- Joint Department of Biomedical Engineering of University of North Carolina, Chapel Hill and North Carolina State University, Raleigh, North Carolina 27695, United States
- Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina 27606, United States
| | - Martin W King
- Wilson College of Textiles, North Carolina State University, Raleigh, North Carolina 27606, United States
| |
Collapse
|
5
|
Nambi Gowri K, King MW. A Review of Barbed Sutures—Evolution, Applications and Clinical Significance. Bioengineering (Basel) 2023; 10:bioengineering10040419. [PMID: 37106607 PMCID: PMC10135495 DOI: 10.3390/bioengineering10040419] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 03/20/2023] [Accepted: 03/23/2023] [Indexed: 03/29/2023] Open
Abstract
Surgical ligatures are a critical component of any surgical procedure since they are the device that provides immediate post-surgical tissue apposition. There have been several studies to improve the design and use of these wound closure devices for different surgical procedures. Yet, there is no standardized technique or device that can be used for any specific application. Over the last two decades, there has been an increased focus on the innovative surgical sutures known as knotless or barbed sutures, along with studies focusing on their advantages and disadvantages in clinical environments. Barbed sutures were invented to reduce the localized stress on the approximated tissues as well as facilitating the surgical technique and improving the clinical outcome for the patient. This review article discusses how barbed sutures evolved from the first patent published in 1964 and how these barbed sutures influence the surgical outcomes in different procedures ranging from cosmetic surgery to orthopedic surgery performed on both human patients and animals.
Collapse
Affiliation(s)
- Karuna Nambi Gowri
- Department of Textile Engineering, Chemistry and Sciences, Wilson College of Textiles, North Carolina State University, Raleigh, NC 27606, USA
- Correspondence: (K.N.G.); (M.W.K.)
| | - Martin W. King
- Department of Textile Engineering, Chemistry and Sciences, Wilson College of Textiles, North Carolina State University, Raleigh, NC 27606, USA
- College of Textiles, Donghua University, Songjiang District, Shanghai 201620, China
- Correspondence: (K.N.G.); (M.W.K.)
| |
Collapse
|
6
|
Zhang F, Tao H, Gluck JM, Wang L, Daneshmand MA, King MW. A textile-reinforced composite vascular graft that modulates macrophage polarization and enhances endothelial cell migration, adhesion and proliferation in vitro. Soft Matter 2023; 19:1624-1641. [PMID: 36752696 DOI: 10.1039/d2sm01190e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
At the present time, there is no successful off-the-shelf small-caliber vascular graft (<6 mm) for the repair or bypass of the coronary or carotid arteries. In this study, we engineer a textile-reinforced hydrogel vascular graft. The textile fibers are circularly knitted into a flexible yet robust conduit to serve as the backbone of the composite vascular graft and provide the primary mechanical support. It is embedded in the hydrogel matrix which seals the open structure of the knitted reinforcement and mediates cellular response toward a faster reendothelialization. The mechanical properties of the composite vascular graft, including bursting strength, suture retention strength and radial compliance, significantly surpass the requirement for the vascular graft application and can be adjusted by altering the structure of the textile reinforcement. The addition of hydrogel matrix, on the other hand, improves the survival, adhesion and proliferation of endothelial cells in vitro. The composite vascular graft also enhances macrophage activation and upregulates M1 and M2 related gene expression, which further improves the endothelial cell migration that might favor the reendothelialization of the vascular graft. Taken together, the textile-reinforced hydrogel shows it potential to be a promising scaffold material to fabricate a tissue engineered vascular graft.
Collapse
Affiliation(s)
- Fan Zhang
- Wilson College of Textiles, North Carolina State University, Raleigh, NC 27606, USA.
| | - Hui Tao
- College of Textiles, Donghua University, Shanghai, 201620, China
| | - Jessica M Gluck
- Wilson College of Textiles, North Carolina State University, Raleigh, NC 27606, USA.
| | - Lu Wang
- College of Textiles, Donghua University, Shanghai, 201620, China
| | - Mani A Daneshmand
- Department of Surgery, School of Medicine, Emory University, Atlanta, Georgia 30322, USA
| | - Martin W King
- Wilson College of Textiles, North Carolina State University, Raleigh, NC 27606, USA.
- College of Textiles, Donghua University, Shanghai, 201620, China
| |
Collapse
|
7
|
Wang Z, Hamedi H, Zhang F, El-Shafei A, Brown AC, Gluck JM, King MW. Plasma-Induced Diallyldimethylammonium Chloride Antibacterial Hernia Mesh. ACS Appl Bio Mater 2022; 5:5645-5656. [PMID: 36446396 DOI: 10.1021/acsabm.2c00695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
A hernia is a pathological condition caused by a defect or opening in the muscle wall, which leads to organs pushing through the opening or defect. Hernia recurrence, seroma, persistent pain, tissue adhesions, and wound infection are common complications following hernia repair surgery. Infection after hernia mesh implantation is the third major complication leading to hernia recurrence. In order to reduce the incidence of late infections, we developed a polypropylene mesh with antibacterial properties. In this study, knitted polypropylene meshes were exposed to radio-frequency plasma to activate their surfaces. The antibacterial monomer diallyldimethylammonium chloride (DADMAC) was then grafted onto the mesh surface using pentaerythritol tetraacrylate as the cross-linker since it is able to engage all four functional groups to form a high-density cross-linked network. The subsequent antibacterial performance showed a 2.9 log reduction toward Staphylococcus aureus and a 0.9 log reduction for Escherichia coli.
Collapse
Affiliation(s)
- Ziyu Wang
- Wilson College of Textiles, North Carolina State University, Raleigh, North Carolina27695, United States
| | - Hamid Hamedi
- Wilson College of Textiles, North Carolina State University, Raleigh, North Carolina27695, United States
| | - Fan Zhang
- Wilson College of Textiles, North Carolina State University, Raleigh, North Carolina27695, United States
| | - Ahmed El-Shafei
- Wilson College of Textiles, North Carolina State University, Raleigh, North Carolina27695, United States
| | - Ashley C Brown
- Joint Dept of Biomedical Engineering, UNC-Chapel Hill and NC State University, Raleigh, North Carolina27695, United States.,Comparative Medicine Institute, NC State University, Raleigh, North Carolina27695, United States
| | - Jessica M Gluck
- Wilson College of Textiles, North Carolina State University, Raleigh, North Carolina27695, United States.,Comparative Medicine Institute, NC State University, Raleigh, North Carolina27695, United States
| | - Martin W King
- Wilson College of Textiles, North Carolina State University, Raleigh, North Carolina27695, United States.,College of Textiles, Donghua University, Songjiang, Shanghai201620, China
| |
Collapse
|
8
|
Zhang F, Scull G, Gluck JM, Brown AC, King MW. Effects of sterilization methods on gelatin methacryloyl hydrogel properties and macrophage gene expression in vitro. Biomed Mater 2022; 18. [PMID: 36410038 PMCID: PMC10038140 DOI: 10.1088/1748-605x/aca4b2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 11/21/2022] [Indexed: 11/22/2022]
Abstract
To assure the long-term safety and functional performance after implantation, it is of critical importance to completely sterilize a biomaterial implant. Ineffective sterilization can cause severe inflammation and infection at the implant site, leading to detrimental events of morbidity and even mortality. Macrophages are pivotal players in the inflammatory and foreign body response after implanting a biomaterial in the body. However, the relationship between the sterilization procedure and macrophage response has not been established. In this study, three commonly used sterilization methods, including autoclaving, ethylene oxide gas and ethanol treatment, were used to sterilize a gelatin methacryloyl hydrogel. The impacts of different sterilization methods on the structure and physical properties of the hydrogel were compared. Macrophage responses to the sterilized hydrogel were analyzed based on their morphology, viability andin vitrogene expression. It was found that the sterilization methods only marginally altered the hydrogel morphology, swelling behavior and elastic modulus, but significantly impacted macrophage gene expression within 48 h and over 7 din vitro. Therefore, when selecting sterilization methods for GelMA hydrogel, not only the sterility and hydrogel properties, such as material destruction and degradation caused by temperature and moisture, should be taken into consideration, but also the cellular responses to the sterilized material which could be substantially different.
Collapse
Affiliation(s)
- Fan Zhang
- Wilson College of Textiles, North Carolina State University, Raleigh, NC, United States of America
| | - Grant Scull
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill, Raleigh, NC, United States of America
| | - Jessica M Gluck
- Wilson College of Textiles, North Carolina State University, Raleigh, NC, United States of America
| | - Ashley C Brown
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill, Raleigh, NC, United States of America
- Comparative Medicine Institute, North Carolina State University, Raleigh, NC, United States of America
| | - Martin W King
- Wilson College of Textiles, North Carolina State University, Raleigh, NC, United States of America
- College of Textiles, Donghua University, Shanghai, People's Republic of China
| |
Collapse
|
9
|
Xie Y, Zhang F, Akkus O, King MW. A collagen/PLA hybrid scaffold supports tendon-derived cell growth for tendon repair and regeneration. J Biomed Mater Res B Appl Biomater 2022; 110:2624-2635. [PMID: 35779243 PMCID: PMC9795886 DOI: 10.1002/jbm.b.35116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 05/12/2022] [Accepted: 06/08/2022] [Indexed: 12/30/2022]
Abstract
A rotator cuff tendon tear is a common shoulder injury with a relatively high rate of recurrence after surgical repair. In order to reinforce the repair and reduce the risk of clinical complications, a patch scaffold is typically sutured over the tendon tear to provide post-surgical mechanical support. However, despite considerable research effort in this area, a patch scaffold that provides both superior initial mechanical properties and supports cell proliferation at the same time has not yet been achieved. In this study, we engineered a collagen/poly(lactic acid) (COL/PLA) hybrid yarn to leverage mechanical strength of PLA yarn and the bioactivity of collagen. The COL/PLA yarns were used to fabricate a tissue engineering scaffold using textile weaving technology. This hybrid scaffold had a tensile strength of 354.0 ± 36.0 N under dry conditions and 267.2 ± 15.9 N under wet conditions, which was satisfactory to maintain normal tendon function. By introducing COL yarns into the hybrid scaffold, the proliferation of tendon-derived cells was significantly improved on the scaffold. Cell coverage after 28-days of in vitro cell culture was noticeably higher on the COL yarns compared to the PLA yarns as a result of a larger number of cells and more spread cell morphology on collagen. Cells spread in multiple directions on COL yarns, which resembled a more natural cell attachment on extracellular matrix. On the contrary, the cells attached to the PLA filaments presented an elongated morphology along the fiber's axial direction. Combining the mechanical robustness of PLA and the biological activity of collagen, the woven COL/PLA hybrid scaffold has shown its potential to be a promising candidate for tendon repair applications.
Collapse
Affiliation(s)
- Yu Xie
- Wilson College of TextilesNorth Carolina State UniversityRaleighNorth CarolinaUSA
| | - Fan Zhang
- Wilson College of TextilesNorth Carolina State UniversityRaleighNorth CarolinaUSA
| | - Ozan Akkus
- Department of Mechanical and Aerospace EngineeringCase Western Reserve UniversityClevelandOhioUSA,Department of Biomedical EngineeringCase Western Reserve UniversityClevelandOhioUSA,Department of OrthopedicsCase Western Reserve UniversityClevelandOhioUSA
| | - Martin W. King
- Wilson College of TextilesNorth Carolina State UniversityRaleighNorth CarolinaUSA,College of TextilesDonghua UniversityShanghaiPeople's Republic of China
| |
Collapse
|
10
|
Huang Y, Cadet ER, King MW, Cole JH. Comparison of the mechanical properties and anchoring performance of polyvinylidene fluoride and polypropylene barbed sutures for tendon repair. J Biomed Mater Res B Appl Biomater 2022; 110:2258-2265. [PMID: 35674273 PMCID: PMC9546200 DOI: 10.1002/jbm.b.35074] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 03/16/2022] [Accepted: 04/18/2022] [Indexed: 11/24/2022]
Abstract
Polyvinylidene fluoride (PVDF) has been considered as an alternative suture material to replace polypropylene (PP) due to its superior biocompatibility and mechanical properties, but it has never been examined for use in barbed sutures, particularly for tendon repair. This study fabricated size 2–0 PVDF and PP bidirectional barbed sutures and compared their mechanical properties and anchoring performance in patellar tendons. The mechanical properties were evaluated via tensile testing, and the anchoring performance of the barbed sutures was assessed by a tendon suture pullout test. Sixty porcine patellar tendons were harvested, transected to mimic a full‐thickness injury, and repaired using a cross‐locked cruciate suturing technique. The ultimate tensile force was 60% higher for the PVDF barbed sutures (22.4 ± 2.1 N) than for the PP barbed sutures (14.0 ± 1.7 N). The maximum pullout force was 35% higher for PVDF barbed sutures (70.8 ± 7.8 N) than for PP barbed sutures (52.4 ± 5.8 N). The force needed to form a 2‐mm gap, indicative of repair failure, was similar between the PVDF (29.2 ± 5.0 N) and PP (25.6 ± 3.1 N) barbed sutures, but both were greater than the 2‐mm‐gap forces for non‐barbed sutures of the same size. In this study, PVDF barbed sutures provided better mechanical properties and improved tissue anchoring performance compared to the barbed PP sutures for porcine patellar tendon repair, demonstrating that PVDF monofilament sutures can be barbed and used effectively for tendon repair.
Collapse
Affiliation(s)
- Yihan Huang
- Wilson College of Textiles, North Carolina State University, Raleigh, North Carolina, USA
| | - Edwin R Cadet
- Raleigh Orthopaedic Clinic, Raleigh, North Carolina, USA.,Department of Orthopaedics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Martin W King
- Wilson College of Textiles, North Carolina State University, Raleigh, North Carolina, USA.,College of Textiles, Donghua University, Shanghai, China
| | - Jacqueline H Cole
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina, USA
| |
Collapse
|
11
|
Hamedi H, Moradi S, Hudson SM, Tonelli AE, King MW. Chitosan based bioadhesives for biomedical applications: A review. Carbohydr Polym 2022; 282:119100. [DOI: 10.1016/j.carbpol.2022.119100] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 12/21/2021] [Accepted: 01/02/2022] [Indexed: 11/02/2022]
|
12
|
Zhang F, King MW. Immunomodulation Strategies for the Successful Regeneration of a Tissue-Engineered Vascular Graft. Adv Healthc Mater 2022; 11:e2200045. [PMID: 35286778 DOI: 10.1002/adhm.202200045] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 02/18/2022] [Indexed: 01/02/2023]
Abstract
Cardiovascular disease leads to the highest morbidity worldwide. There is an urgent need to solve the lack of a viable arterial graft for patients requiring coronary artery bypass surgery. The current gold standard is to use the patient's own blood vessel, such as a saphenous vein graft. However, some patients do not have appropriate vessels to use because of systemic disease or secondary surgery. On the other hand, there is no commercially available synthetic vascular graft available on the market for small diameter (<6 mm) blood vessels like coronary, carotid, and peripheral popliteal arteries. Tissue-engineered vascular grafts (TEVGs) are studied in recent decades as a promising alternative to synthetic arterial prostheses. Yet only a few studies have proceeded to a clinical trial. Recent studies have uncovered that the host immune response can be directed toward increasing the success of a TEVG by shedding light on ways to modulate the macrophage response and improve the tissue regeneration outcome. In this review, the basic concepts of vascular tissue engineering and immunoengineering are considered. The state-of-art of TEVGs is summarized and the role of macrophages in TEVG regeneration is analyzed. Current immunomodulatory strategies based on biomaterials are also discussed.
Collapse
Affiliation(s)
- Fan Zhang
- Wilson College of Textiles North Carolina State University Raleigh NC 27606 USA
| | - Martin W. King
- Wilson College of Textiles North Carolina State University Raleigh NC 27606 USA
| |
Collapse
|
13
|
Vaid R, Yildirim E, Pasquinelli MA, King MW. Hydrolytic Degradation of Polylactic Acid Fibers as a Function of pH and Exposure Time. Molecules 2021; 26:molecules26247554. [PMID: 34946629 PMCID: PMC8706057 DOI: 10.3390/molecules26247554] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/19/2021] [Accepted: 11/19/2021] [Indexed: 11/16/2022] Open
Abstract
Polylactic acid (PLA) is a widely used bioresorbable polymer in medical devices owing to its biocompatibility, bioresorbability, and biodegradability. It is also considered a sustainable solution for a wide variety of other applications, including packaging. Because of its widespread use, there have been many studies evaluating this polymer. However, gaps still exist in our understanding of the hydrolytic degradation in extreme pH environments and its impact on physical and mechanical properties, especially in fibrous materials. The goal of this work is to explore the hydrolytic degradation of PLA fibers as a function of a wide range of pH values and exposure times. To complement the experimental measurements, molecular-level details were obtained using both molecular dynamics (MD) simulations with ReaxFF and density functional theory (DFT) calculations. The hydrolytic degradation of PLA fibers from both experiments and simulations was observed to have a faster rate of degradation in alkaline conditions, with 40% of strength loss of the fibers in just 25 days together with an increase in the percent crystallinity of the degraded samples. Additionally, surface erosion was observed in these PLA fibers, especially in extreme alkaline environments, in contrast to bulk erosion observed in molded PLA grafts and other materials, which is attributed to the increased crystallinity induced during the fiber spinning process. These results indicate that spun PLA fibers function in a predictable manner as a bioresorbable medical device when totally degraded at end-of-life in more alkaline conditions.
Collapse
Affiliation(s)
- Radhika Vaid
- Fiber and Polymer Science Program, Wilson College of Textiles, NC State University, Raleigh, NC 27606, USA; (R.V.); (M.A.P.)
| | - Erol Yildirim
- Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey;
| | - Melissa A. Pasquinelli
- Fiber and Polymer Science Program, Wilson College of Textiles, NC State University, Raleigh, NC 27606, USA; (R.V.); (M.A.P.)
- Department of Forest Biomaterials, College of Natural Resources, NC State University, Raleigh, NC 27606, USA
| | - Martin W. King
- Fiber and Polymer Science Program, Wilson College of Textiles, NC State University, Raleigh, NC 27606, USA; (R.V.); (M.A.P.)
- College of Textiles, Donghua University, Shanghai 201620, China
- Correspondence: ; Tel.: +1-919-291-2563
| |
Collapse
|
14
|
Zhao F, Sun J, Xue W, Wang F, King MW, Yu C, Jiao Y, Sun K, Wang L. Development of a polycaprolactone/poly( p-dioxanone) bioresorbable stent with mechanically self-reinforced structure for congenital heart disease treatment. Bioact Mater 2021; 6:2969-2982. [PMID: 33732967 PMCID: PMC7930591 DOI: 10.1016/j.bioactmat.2021.02.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 02/11/2021] [Accepted: 02/14/2021] [Indexed: 12/12/2022] Open
Abstract
Recent progress in bioresorbable stents (BRSs) has provided a promising alternative for treating coronary artery disease. However, there is still lack of BRSs with satisfied compression and degradation performance for pediatric patients with congenital heart disease, leading to suboptimal therapy effects. Here, we developed a mechanically self-reinforced composite bioresorbable stent (cBRS) for congenital heart disease application. The cBRS consisted of poly(p-dioxanone) monofilaments and polycaprolactone/poly(p-dioxanone) core-shell composite yarns. Interlacing points in cBRS structure were partially bonded, offering the cBRS with significantly higher compression force compared to typical braids and remained good compliance. The suitable degradation profile of the cBRS can possibly preserve vascular remodeling and healing process. In addition, the controllable structural organization provides a method to customize the performance of the cBRS by altering the proportion of different components in the braids. The in vivo results suggested the cBRS supported the vessel wall similar to that of metallic stent. In both abdominal aorta and iliac artery of porcine, cBRS was entirely endothelialized within 1 month and maintained target vessels with good patency in the 12-month follow-up. The in vivo degradation profile of the cBRS is consistent with static degradation results in vitro. It is also demonstrated that there is minimal impact of pulsatile pressure of blood flow and variation of radial force on the degradation rate of the cBRS. Moreover, the lumen of cBRS implanted vessels were enlarged after 6 months, and significantly larger than the vessels implanted with metallic stent in 12 months.
Collapse
Affiliation(s)
- Fan Zhao
- College of Textiles, Donghua University, Shanghai, 201620, China
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Songjiang District, Shanghai, 201620, China
- Wilson College of Textiles, North Carolina State University, Raleigh, 27606, USA
| | - Jing Sun
- Department of Pediatric Cardiology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, No. 1665 Kongjiang Road, Shanghai, 200092, China
| | - Wen Xue
- College of Textiles, Donghua University, Shanghai, 201620, China
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Songjiang District, Shanghai, 201620, China
| | - Fujun Wang
- College of Textiles, Donghua University, Shanghai, 201620, China
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Songjiang District, Shanghai, 201620, China
| | - Martin W. King
- Wilson College of Textiles, North Carolina State University, Raleigh, 27606, USA
| | - Chenglong Yu
- College of Textiles, Donghua University, Shanghai, 201620, China
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Songjiang District, Shanghai, 201620, China
| | - Yongjie Jiao
- College of Textiles, Donghua University, Shanghai, 201620, China
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Songjiang District, Shanghai, 201620, China
| | - Kun Sun
- Department of Pediatric Cardiology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, No. 1665 Kongjiang Road, Shanghai, 200092, China
| | - Lu Wang
- College of Textiles, Donghua University, Shanghai, 201620, China
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Songjiang District, Shanghai, 201620, China
| |
Collapse
|
15
|
Guan G, Yu C, Fang X, Guidoin R, King MW, Wang H, Wang L. Exploration into practical significance of integral water permeability of textile vascular grafts. J Appl Biomater Funct Mater 2021; 19:22808000211014007. [PMID: 34223772 DOI: 10.1177/22808000211014007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Water permeability of textile vascular grafts has been considered as a key indicator for predicting blood permeability after implantation. However, a correlation between water and blood permeability has not been established yet. Therefore, even though the water permeability of a vascular graft can be tested according to the standard ISO 7198, the results fail to guide a manufacturer or a surgeon to judge whether this vascular graft needs pre-clotting or not prior to implantation. As a result, all commercial graft products show almost zero water permeability, which leads to the loss of advantages that textile vascular grafts have the pore size-controlled porous wall. To solve this problem, four types of woven vascular grafts were designed and manufactured in the present work. Then their permeability to water, simulated plasma, and anticoagulated whole blood were measured at graded pressures from 8 to 16 kPa. Moreover, the correlations among the water permeability, the simulated plasma permeability, and the anticoagulated whole blood permeability were established. The results suggest that relatively steady correlations exist between the water permeability and the anticoagulated whole blood permeability, and that the evaluation of the blood permeability using the water permeability is feasible and objective. The present work provides a quantitative method for evaluating the blood permeability using the water permeability, and the latter is thus endowed with practical significance for guiding designs and clinical pre-clotting operations of textiles vascular grafts.
Collapse
Affiliation(s)
- Guoping Guan
- Engineering Research Center of Technical Textiles of Ministry of Education, College of Textiles, Donghua University, Shanghai, China.,Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, China
| | - Chenglong Yu
- Engineering Research Center of Technical Textiles of Ministry of Education, College of Textiles, Donghua University, Shanghai, China.,Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, China
| | - Xuan Fang
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, China
| | - Robert Guidoin
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, China.,Department of Surgery, Université Laval and Centre de Recherche du CHU de Quebec, Quebec, QC, Canada
| | - Martin W King
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, China.,College of Textiles, North Carolina State University, Raleigh, NC, USA
| | - Hongjun Wang
- Department of Biomedical Engineering, Stevens Institute of Technology, Hoboken, NJ, USA
| | - Lu Wang
- Engineering Research Center of Technical Textiles of Ministry of Education, College of Textiles, Donghua University, Shanghai, China.,Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, China
| |
Collapse
|
16
|
Gajjar C, Stallrich JW, Pasquinelli MA, King MW. Process-Property Relationships for Melt-Spun Poly(lactic acid) Yarn. ACS Omega 2021; 6:15920-15928. [PMID: 34179636 PMCID: PMC8223423 DOI: 10.1021/acsomega.1c01557] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 05/27/2021] [Indexed: 05/27/2023]
Abstract
Poly(lactic acid) (PLA) is an attractive biomaterial due to its biocompatibility, biodegradability, and fiber-forming ability. However, the polymer is highly susceptible to both hydrolytic and thermal degradation during processing. Melt processing conditions typically involve high temperature and shear, whereas to prevent premature degradation, PLA needs to be processed under the mildest conditions that still yield the desired yarn properties. Thus, there is a need to determine the optimum processing conditions to achieve the desired properties of extruded PLA yarn. This study focuses on the effect of melt-spinning process parameters on the mechanical and physicochemical properties of the resulting PLA yarn and to derive their process-property relationships. The study compares the effect of process parameters like melt temperature, throughput through the spinneret, take-up speed at the wind-up roller, draw ratio, and drawing temperature on the yarn properties such as the yarn size (linear mass density), tenacity, elongation at break, crystallinity, and molecular weight. Depending on the combination of process parameters, the resulting PLA yarn had a yarn size ranging from 6.2 to 101.6 tex, tenacity ranging from 2.5 to 34.1 gf/tex, elongation at break ranging from 4 to 480%, and degree of crystallinity ranging from 14.6 to 62.2%. Certain combinations of processing parameters resulted in higher process-induced degradation, as evident from the reduction in molecular weight, ranging from 7.6% reduction to 20.5% reduction. Findings from this study increase our understanding on how different process parameters can be utilized to achieve the desired properties of the as-spun and drawn PLA yarn while controlling process-induced premature degradation.
Collapse
Affiliation(s)
- Chirag
R. Gajjar
- Wilson
College of Textiles, North Carolina State
University, Raleigh 27606, United States
| | - Jon W. Stallrich
- Department
of Statistics, North Carolina State University, Raleigh 27695, United States
| | - Melissa A. Pasquinelli
- Wilson
College of Textiles, North Carolina State
University, Raleigh 27606, United States
- College
of Natural Resources, North Carolina State
University, Raleigh 27695, United States
| | - Martin W. King
- Wilson
College of Textiles, North Carolina State
University, Raleigh 27606, United States
- College
of Textiles, Donghua University, Songjiang District, Shanghai 201620, China
| |
Collapse
|
17
|
Abstract
Collagen is the major component of the extracellular matrix in human tissues and widely used in the fabrication of tissue engineered scaffolds for medical applications. However, these forms of collagen gels and films have limitations due to their inferior strength and mechanical performance and their relatively fast rate of degradation. A new form of continuous collagen yarn has recently been developed for potential usage in fabricating textile tissue engineering scaffolds. In this study, we prepared the continuous electrochemical aligned collagen yarns from acid-soluble collagen that was extracted from rat tail tendons (RTTs) using 0.25 M acetic acid. Sodium dodecyl sulfate polyacrylamide gel electrophoresis and Fourier transform infrared spectroscopy confirmed that the major component of the extracted collagen contained alpha 1 and alpha 2 chains and the triple helix structure of Type 1 collagen. The collagen solution was processed to monofilament yarns in continuous lengths by using a rotating electrode electrochemical compaction device. Exposing the non-crosslinked collagen yarns and the collagen yarns crosslinked with 1-ethyl-3-(-3-dimethyl-aminopropyl) carbodiimide hydrochloride to normal physiological hydrolytic degradation conditions showed that both yarns were able to maintain their tensile strength during the first 6 weeks of the study. Cardiosphere-derived cells showed significantly enhanced attachment and proliferation on the collagen yarns compared to synthetic polylactic acid filaments. Moreover, the cells were fully spread and covered the surface of the collagen yarns, which confirmed the superiority of collagen in terms of promoting cellular adhesion. The results of this work indicated that the aligned RTT collagen yarns are favorable for fabricating biotextile scaffolds and are encouraging for further studies of various textile structure for different tissue engineering applications.
Collapse
Affiliation(s)
- Yu Xie
- Wilson College of Textiles, North Carolina State University, Raleigh, North Carolina, United States of America
| | | | | | | | | |
Collapse
|
18
|
Singhi B, Ford EN, King MW. The effect of wet spinning conditions on the structure and properties of poly-4-hydroxybutyrate fibers. J Biomed Mater Res B Appl Biomater 2020; 109:982-989. [PMID: 33241640 DOI: 10.1002/jbm.b.34763] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 10/29/2020] [Accepted: 11/10/2020] [Indexed: 11/05/2022]
Abstract
Polyhydroxyalkanoates (PHAs), also known as bacterial polyesters, are considered novel polymers for fabricating biomedical products, such as sutures and hernia meshes, because of their biocompatibility and slow biodegradability. Poly-4-hydroxybutyrate (P4HB) is a commonly used PHA that was explored in this study as an absorbable biomaterial for several medical applications, including controlled drug delivery. Currently, P4HB is melt spun and drawn into filaments at high processing temperatures (~200°C), precluding the incorporation of thermally sensitive drugs within the polymer during melt spinning. Post-spinning drug incorporation can potentially cause nonuniform drug absorption that leads to an uneven release profile. This raises the need for a low temperature spinning process for these polymers. Until now, there has been no defined procedure to produce P4HB fibers through a low temperature solution spinning process. This study focuses on determining suitable wet spinning conditions to form continuous P4HB fibers. After several preliminary tests, it was found that a chloroform-based spin dope with 10-15% polymer concentration facilitated the extrusion of continuous stretchable fibers into a coagulation bath containing reagent alcohol. Subsequently, several P4HB fibers were spun with various spin dope concentrations, coagulation bath temperatures, and spin draw ratios to assess their effect on fiber structure and properties.
Collapse
Affiliation(s)
- Bhavya Singhi
- Wilson College of Textiles, North Carolina State University, Raleigh, North Carolina, USA
| | - Ericka N Ford
- Wilson College of Textiles, North Carolina State University, Raleigh, North Carolina, USA
| | - Martin W King
- Wilson College of Textiles, North Carolina State University, Raleigh, North Carolina, USA.,College of Textiles, Donghua University, Shanghai, China
| |
Collapse
|
19
|
Deshpande MV, West AJ, Bernacki SH, Luan K, King MW. Poly(ε-Caprolactone) Resorbable Auxetic Designed Knitted Scaffolds for Craniofacial Skeletal Muscle Regeneration. Bioengineering (Basel) 2020; 7:bioengineering7040134. [PMID: 33114301 PMCID: PMC7712030 DOI: 10.3390/bioengineering7040134] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/08/2020] [Accepted: 10/22/2020] [Indexed: 11/16/2022] Open
Abstract
Craniofacial microsomia is a congenital deformity caused by asymmetric development of the skull (cranium) and face before birth. Current treatments include corrective surgery and replacement of the deformed structure using autograft tissue, which results in donor site morbidity. An alternative therapy can be achieved by developing a resorbable scaffold for skeletal muscle regeneration which will help restore the symmetry and function of the facial muscles and reduce donor site morbidity. Two resorbable weft knitted scaffolds were fabricated using poly(ε-caprolactone) multifilament yarns with unique auxetic design structures possessing negative Poisson’s ratio (NPR). These scaffolds exhibit their NPR elasticity through an increase in total volume as well as no lateral narrowing when stretched longitudinally, which can provide orientated mechanical supports to the cell growth of skeletal muscle regeneration. These scaffolds were evaluated for the required physical properties, mechanical performance and biocompatibility by culturing them with neonatal human dermal fibroblasts so as to determine their cell metabolic activity, cell attachment and proliferation. This study can facilitate the understanding and engineering of textile-based scaffolds for tissues/organs. The work also paves a pathway to emerge the NPR textiles into tissue engineering, which has an extensive potential for biomedical end-uses.
Collapse
Affiliation(s)
- Monica V. Deshpande
- Wilson College of Textiles, North Carolina State University, Raleigh, NC 27695, USA; (M.V.D.); (A.J.W.); (K.L.)
| | - Andre J. West
- Wilson College of Textiles, North Carolina State University, Raleigh, NC 27695, USA; (M.V.D.); (A.J.W.); (K.L.)
| | - Susan H. Bernacki
- Joint Department of Biomedical Engineering, University of North Carolina, Chapel Hill & North Carolina State University, Raleigh, NC 27599, USA;
| | - Kun Luan
- Wilson College of Textiles, North Carolina State University, Raleigh, NC 27695, USA; (M.V.D.); (A.J.W.); (K.L.)
| | - Martin W. King
- Wilson College of Textiles, North Carolina State University, Raleigh, NC 27695, USA; (M.V.D.); (A.J.W.); (K.L.)
- College of Textiles, Donghua University, Shanghai 201620, China
- Correspondence:
| |
Collapse
|
20
|
Zhang F, King MW. Biodegradable Polymers as the Pivotal Player in the Design of Tissue Engineering Scaffolds. Adv Healthc Mater 2020; 9:e1901358. [PMID: 32424996 DOI: 10.1002/adhm.201901358] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 04/03/2020] [Indexed: 01/15/2023]
Abstract
Biodegradable polymers play a pivotal role in in situ tissue engineering. Utilizing various technologies, researchers have been able to fabricate 3D tissue engineering scaffolds using biodegradable polymers. They serve as temporary templates, providing physical and biochemical signals to the cells and determining the successful outcome of tissue remodeling. Furthermore, a biodegradable scaffold also presents the fourth dimension for tissue engineering, namely time. The properties of the biodegradable polymer change over time, presenting continuously changing features during the degradation process. These changes become more complicated when different materials are combined together to fabricate a composite or heterogeneous scaffold. This review undertakes a systematic analysis of the basic characteristics of biodegradable polymers and describe recent advances in making composite biodegradable scaffolds for in situ tissue engineering and regenerative medicine. The interaction between implanted biodegradable biomaterials and the in vivo environment are also discussed, including the properties and functional changes of the degradable scaffold, the local effect of degradation on the contiguous tissue and their evaluation using both in vitro and in vivo models.
Collapse
Affiliation(s)
- Fan Zhang
- Wilson College of TextilesNorth Carolina State University Raleigh NC 27606 USA
| | - Martin W. King
- Wilson College of TextilesNorth Carolina State University Raleigh NC 27606 USA
- College of TextilesDonghua University Songjiang District Shanghai 201620 China
| |
Collapse
|
21
|
Chang C, Ginn B, Livingston NK, Yao Z, Slavin B, King MW, Chung S, Mao HQ. Medical Fibers and Biotextiles. Biomater Sci 2020. [DOI: 10.1016/b978-0-12-816137-1.00038-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
22
|
W. King M, Chen J, Deshpande M, He T, Ramakrishna H, Xie Y, Zhang F, Zhao F. Structural Design, Fabrication and Evaluation of Resorbable Fiber-Based Tissue Engineering Scaffolds. Biotechnol Bioeng 2019. [DOI: 10.5772/intechopen.84643] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
23
|
Zhang F, Xie Y, Celik H, Akkus O, Bernacki SH, King MW. Engineering small-caliber vascular grafts from collagen filaments and nanofibers with comparable mechanical properties to native vessels. Biofabrication 2019; 11:035020. [PMID: 30943452 DOI: 10.1088/1758-5090/ab15ce] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
At the present time, there is no successful synthetic, off-the-shelf small-caliber vascular graft (<6 mm) for the repair or bypass of the coronary or carotid arteries. This stimulates on-going investigations to fabricate an artificial vascular graft that has both sufficient mechanical properties as well as superior biological performance. Collagen has long been considered as a viable material to encourage cell recruitment, tissue regeneration, and revascularization, but its use has been limited by its inferior mechanical properties. In this study, novel electrochemically aligned collagen filaments were used to engineer a bilayer small-caliber vascular graft, by circular knitting the collagen filaments and electrospinning collagen nanofibers. The collagen prototype grafts showed significantly greater bursting strength under dry and hydrated conditions to that of autografts such as the human internal mammary artery and the saphenous vein (SV). The suture retention strength was sufficient under dry condition, but that under hydrated condition needs to be further improved. The radial dynamic compliance of the collagen grafts was similar to that of the human SV. During in vitro cell culture assays with human umbilical vein endothelial cells, the prototype collagen grafts also encouraged cell adhesion and promoted cell proliferation compared to the synthetic poly(lactic acid) grafts. In conclusion, this study demonstrated the feasibility of the use of novel collagen filaments for fabricating small caliber tissue-engineered vascular grafts that provide both sufficient mechanical properties and superior biological performance.
Collapse
Affiliation(s)
- Fan Zhang
- Wilson College of Textiles, North Carolina State University, Raleigh, United States of America
| | | | | | | | | | | |
Collapse
|
24
|
Ramakrishna H, Li T, He T, Temple J, King MW, Spagnoli A. Tissue engineering a tendon-bone junction with biodegradable braided scaffolds. Biomater Res 2019; 23:11. [PMID: 31131112 PMCID: PMC6521458 DOI: 10.1186/s40824-019-0160-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Accepted: 04/15/2019] [Indexed: 11/10/2022] Open
Abstract
Background Tendons play an important role in transferring stress between muscles and bones and in maintaining the stability of joints. Tendon tears are difficult to heal and are associated with high recurrence rates. So, the objective of this study was to develop a biodegradable scaffold for tendon-bone junction regeneration. Methods Two types of polylactic acid (PLA) yarns, having fibers with round and four deep grooved cross-sections, were braided into tubular scaffolds and cultured with murine Transforming growth factor beta type II receptor (Tgfbr2)-expressing joint progenitor cells. The scaffolds were designed to mimic the mechanical, immuno-chemical and biological properties of natural mouse tendon-bone junctions. Three different tubular scaffolds measuring 2 mm in diameter were braided on a Steeger 16-spindle braiding machine and biological and mechanical performance of the three scaffolds were evaluated. Results The mechanical test results indicated that three different braided scaffold structures provided a wide range of mechanical properties that mimic the components of tendon bone junction and results of the biological tests confirmed cell viability, active cell attachment and proliferation throughout all three scaffolds. Conclusions This study has identified that the three proposed types of braided scaffolds with some improvement in their structures have the potential to be used as scaffolds for the regeneration of a tendon bone tissue junction.
Collapse
Affiliation(s)
- Harshini Ramakrishna
- 1Wilson College of Textiles, North Carolina State University, 1020 Main Campus Drive, Raleigh, NC 27606 USA
| | - Tieshi Li
- 5Department of Pediatrics, University of Nebraska Medical Center, Children's Hospital & Medical Center, Omaha, NE 68198-5945 USA
| | - Ting He
- 1Wilson College of Textiles, North Carolina State University, 1020 Main Campus Drive, Raleigh, NC 27606 USA
| | - Joseph Temple
- 2Department of Pediatrics, Rush University Medical Center, 1735 W. Harrison Street, 502A Cohn Research Building, 5th floor, Chicago, IL 60612 USA
| | - Martin W King
- 1Wilson College of Textiles, North Carolina State University, 1020 Main Campus Drive, Raleigh, NC 27606 USA.,3College of Textiles, Donghua University, 2999 Renmin Road North, Songjiang District, Shanghai, 201620 China.,4Department of Biosystems Engineering, University of Manitoba, Engineering, Information and Technology Complex, 75A Chancellor's Circle, Winnipeg, MB R3T 5V6 Canada
| | - Anna Spagnoli
- 5Department of Pediatrics, University of Nebraska Medical Center, Children's Hospital & Medical Center, Omaha, NE 68198-5945 USA
| |
Collapse
|
25
|
Guan Y, Wang L, Lin J, King MW. Compliance Study of Endovascular Stent Grafts Incorporated with Polyester and Polyurethane Graft Materials in both Stented and Unstented Zones. Materials (Basel) 2016; 9:ma9080658. [PMID: 28773781 PMCID: PMC5509269 DOI: 10.3390/ma9080658] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 07/23/2016] [Accepted: 07/26/2016] [Indexed: 11/16/2022]
Abstract
Compliance mismatch between stent graft and host artery may induce complications and blood flow disorders. However, few studies have been reported on stent graft compliance. This study aims to explore the deformation and compliance of stent graft in stented and unstented zones under three pressure ranges. Compliance of two stent grafts incorporated with polyurethane graft (nitinol-PU) and polyester graft (nitinol-PET) materials respectively were tested; the stents used in the two stent grafts were identical. For the circumferential deformation of the stent grafts under each pressure range, the nitinol-PET stent graft was uniform in both zones. The nitinol-PU stent graft was circumferentially uniform in the stented zone, however, it was nonuniform in the unstented zone. The compliance of the PU graft material was 15 times higher than that of the PET graft. No significant difference in compliance was observed between stented and unstented zones of the nitinol-PET stent graft regardless of the applied pressure range. However, for the nitinol-PU stent graft, compliance of the unstented PU region was approximately twice that of the stented region; thus, compliance along the length of the nitinol-PU stent graft was not constant and different from that of the nitinol-PET stent graft.
Collapse
Affiliation(s)
- Ying Guan
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, 2999 North Renmin Road, Songjiang, Shanghai 201620, China.
| | - Lu Wang
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, 2999 North Renmin Road, Songjiang, Shanghai 201620, China.
| | - Jing Lin
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, 2999 North Renmin Road, Songjiang, Shanghai 201620, China.
| | - Martin W King
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, 2999 North Renmin Road, Songjiang, Shanghai 201620, China.
- College of Textiles, North Carolina State University, Raleigh, NC 27695-8301, USA.
| |
Collapse
|
26
|
Xie Y, Guan Y, Kim SH, King MW. The mechanical performance of weft-knitted/electrospun bilayer small diameter vascular prostheses. J Mech Behav Biomed Mater 2016; 61:410-418. [DOI: 10.1016/j.jmbbm.2016.04.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 04/04/2016] [Accepted: 04/06/2016] [Indexed: 11/16/2022]
|
27
|
Wang F, Mohammed A, Li C, Ge P, Wang L, King MW. Degradable/non-degradable polymer composites for in-situ tissue engineering small diameter vascular prosthesis application. Biomed Mater Eng 2015; 24:2127-33. [PMID: 25226910 DOI: 10.3233/bme-141023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Various tissue-engineered vascular grafts have been studied in order to overcome the clinical disadvantages associated with conventional prostheses. However, previous tissue-engineered vascular grafts have possessed insufficient mechanical properties and thus have generally required either preoperative cellular manipulation or the use of bioreactors to improve their performance. In this study, we focused on the concept of in situ cellularization and developed a tissue-engineered vascular graft with degradable/non-degradable polymer composites for arterial reconstruction that would facilitate the renewal of autologous tissue without any pretreatment. Additionally, these composites are designed to improve the mechanical performance of a small-diameter vascular prosthesis scaffold that is made from a flexible membrane of poly(e-caprolactone) (PCL). The PCL scaffold was reinforced by embedding a tubular fabric that was knitted from polyethylene terephthalate (PET) yarns within the freeze-dried composite structure. Adding this knitted fabric component significantly improved the mechanical properties of the composite scaffold, such as its tensile strength and initial modulus, radial compliance, compression recovery, and suture retention force. Finally, this reinforced composite structure is a promising candidate for use as a tissue-engineered scaffold for a future small diameter vascular prosthesis.
Collapse
Affiliation(s)
- Fujun Wang
- Key Laboratory of Textile Science and Technology, Ministry of Education, Donghua University, Shanghai 201620, China College of Textiles, Donghua University, Shanghai 201620, China
| | - Abedalwafa Mohammed
- Key Laboratory of Textile Science and Technology, Ministry of Education, Donghua University, Shanghai 201620, China College of Textiles, Donghua University, Shanghai 201620, China
| | - Chaojing Li
- Key Laboratory of Textile Science and Technology, Ministry of Education, Donghua University, Shanghai 201620, China College of Textiles, Donghua University, Shanghai 201620, China
| | - Peng Ge
- Key Laboratory of Textile Science and Technology, Ministry of Education, Donghua University, Shanghai 201620, China College of Textiles, Donghua University, Shanghai 201620, China
| | - Lu Wang
- Key Laboratory of Textile Science and Technology, Ministry of Education, Donghua University, Shanghai 201620, China College of Textiles, Donghua University, Shanghai 201620, China
| | - Martin W King
- Key Laboratory of Textile Science and Technology, Ministry of Education, Donghua University, Shanghai 201620, China College of Textiles, Donghua University, Shanghai 201620, China Department of Textile Engineering, Chemistry & Science, North Carolina State University, Raleigh, NC, USA
| |
Collapse
|
28
|
Elahi MF, Guan G, Wang L, Zhao X, Wang F, King MW. Surface modification of silk fibroin fabric using layer-by-layer polyelectrolyte deposition and heparin immobilization for small-diameter vascular prostheses. Langmuir 2015; 31:2517-2526. [PMID: 25671295 DOI: 10.1021/la504503w] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
There is an urgent need to develop a biologically active implantable small-diameter vascular prosthesis with long-term patency. Silk-fibroin-based small-diameter vascular prosthesis is a promising candidate having higher patency rate; however, the surface modification is indeed required to improve its further hemocompatibility. In this study, silk fibroin fabric was modified by a two-stage process. First, the surface of silk fibroin fabric was coated using a layer-by-layer polyelectrolyte deposition technique by stepwise dipping the silk fibroin fabric into a solution of cationic poly(allylamine hydrochloride) (PAH) and anionic poly(acrylic acid) (PAA) solution. The dipping procedure was repeated to obtain the PAH/PAA multilayers deposited on the silk fibroin fabrics. Second, the polyelectrolyte-deposited silk fibroin fabrics were treated in EDC/NHS-activated low-molecular-weight heparin (LMWH) solution at 4 °C for 24 h, resulting in immobilization of LMWH on the silk fibroin fabrics surface. Scanning electron microscopy, atomic force microscopy, and energy-dispersive X-ray data revealed the accomplishment of LMWH immobilization on the polyelectrolyte-deposited silk fibroin fabric surface. The higher the number of PAH/PAA coating layers on the silk fibroin fabric, the more surface hydrophilicity could be obtained, resulting in a higher fetal bovine serum protein and platelets adhesion resistance properties when tested in vitro. In addition, compared with untreated sample, the surface-modified silk fibroin fabrics showed negligible loss of bursting strength and thus reveal the acceptability of polyelectrolytes deposition and heparin immobilization approach for silk-fibroin-based small-diameter vascular prostheses modification.
Collapse
Affiliation(s)
- M Fazley Elahi
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University , 2999 North Renmin Road, Songjiang, Shanghai 201620, China
| | | | | | | | | | | |
Collapse
|
29
|
Niu X, Rouabhia M, Chiffot N, King MW, Zhang Z. An electrically conductive 3D scaffold based on a nonwoven web of poly(l-lactic acid) and conductive poly(3,4-ethylenedioxythiophene). J Biomed Mater Res A 2015; 103:2635-44. [DOI: 10.1002/jbm.a.35408] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 01/06/2015] [Accepted: 01/21/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Xufeng Niu
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science & Medical Engineering, Beihang University; Beijing China
- Department of Surgery; Faculty of Medicine; Laval University; Division of Regenerative Medicine; CHU de Quebec Research Centre; Quebec Quebec Canada
| | - Mahmoud Rouabhia
- Oral Ecology Research Group, Faculty of Dentistry, Laval University; Quebec Quebec Canada
| | - Nicolas Chiffot
- Department of Surgery; Faculty of Medicine; Laval University; Division of Regenerative Medicine; CHU de Quebec Research Centre; Quebec Quebec Canada
- Oral Ecology Research Group, Faculty of Dentistry, Laval University; Quebec Quebec Canada
| | - Martin W. King
- College of Textiles, North Carolina State University; Raleigh North Carolina
- College of Textiles, Donghua University; Shanghai China
| | - Ze Zhang
- Department of Surgery; Faculty of Medicine; Laval University; Division of Regenerative Medicine; CHU de Quebec Research Centre; Quebec Quebec Canada
| |
Collapse
|
30
|
Fu Y, Wang L, Wang F, Guan G, Hu X, Xie Q, Wang W, King MW. Influence of structures on the mechanical and absorption properties of a textile pile debridement material and its biological evaluation. RSC Adv 2015. [DOI: 10.1039/c5ra18746j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Textile pile debridement materials were prepared by sliver knitting and back-coating. They gave superior mechanical performance, greater liquid absorption and satisfactory biocompatibility compared to a cotton gauze control sample.
Collapse
Affiliation(s)
- Yijun Fu
- Key Laboratory of Textile Science and Technology of Ministry of Education
- College of Textiles
- Donghua University
- Shanghai
- China
| | - Lu Wang
- Key Laboratory of Textile Science and Technology of Ministry of Education
- College of Textiles
- Donghua University
- Shanghai
- China
| | - Fujun Wang
- Key Laboratory of Textile Science and Technology of Ministry of Education
- College of Textiles
- Donghua University
- Shanghai
- China
| | - Guoping Guan
- Key Laboratory of Textile Science and Technology of Ministry of Education
- College of Textiles
- Donghua University
- Shanghai
- China
| | - Xingyou Hu
- Key Laboratory of Textile Science and Technology of Ministry of Education
- College of Textiles
- Donghua University
- Shanghai
- China
| | - Qixue Xie
- Key Laboratory of Textile Science and Technology of Ministry of Education
- College of Textiles
- Donghua University
- Shanghai
- China
| | - Wenzu Wang
- Key Laboratory of Textile Science and Technology of Ministry of Education
- College of Textiles
- Donghua University
- Shanghai
- China
| | - Martin W. King
- Key Laboratory of Textile Science and Technology of Ministry of Education
- College of Textiles
- Donghua University
- Shanghai
- China
| |
Collapse
|
31
|
Tambe N, Di J, Zhang Z, Bernacki S, El-Shafei A, King MW. Novel genipin-collagen immobilization of polylactic acid (PLA) fibers for use as tissue engineering scaffolds. J Biomed Mater Res B Appl Biomater 2014; 103:1188-97. [PMID: 25308088 DOI: 10.1002/jbm.b.33285] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 08/01/2014] [Accepted: 08/19/2014] [Indexed: 11/12/2022]
Abstract
The material surface plays an important role in the case of biomaterials used as tissue engineering scaffolds. On exposure to a biological environment, extra cellular matrix (ECM) proteins are adsorbed non-specifically onto the surface and cells interact indirectly with the surface through the adsorbed proteins. Most synthetic polymeric biomaterials lack the desirable surface properties for cells as well as have poor cellular adhesion due to their hydrophobic nature. The main objective of this study was to harness surface functionalization technologies to fabricate scaffolds that would be biocompatible and support the adhesion and proliferation of fibroblast cells. The collagen was immobilized on the surface of functionalized PLA via a novel natural cross-linking molecule genipin which resulted in improved cell proliferation of human dermal fibroblasts as compared to the PLA surface coated with collagen without genipin. It is believed that genipin helps reduce steric problems between the functional groups and large protein molecules, and enables immobilized peptide to move more freely in a biological environment.
Collapse
Affiliation(s)
- Nisarg Tambe
- College of Textiles, North Carolina State University, Raleigh, North Carolina
| | - Jin Di
- College of Textiles, North Carolina State University, Raleigh, North Carolina.,Department of Biomedical Engineering, North Carolina State University, Raleigh, North Carolina
| | - Ze Zhang
- Department of Surgery, Faculty of Medicine, Laval University, Quebec, Quebec, Canada
| | - Susan Bernacki
- Department of Biomedical Engineering, North Carolina State University, Raleigh, North Carolina
| | - Ahmed El-Shafei
- College of Textiles, North Carolina State University, Raleigh, North Carolina
| | - Martin W King
- College of Textiles, North Carolina State University, Raleigh, North Carolina
| |
Collapse
|
32
|
Zou T, Wang L, Li W, Wang W, Chen F, King MW. A resorbable bicomponent braided ureteral stent with improved mechanical performance. J Mech Behav Biomed Mater 2014; 38:17-25. [DOI: 10.1016/j.jmbbm.2014.06.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2014] [Revised: 06/05/2014] [Accepted: 06/08/2014] [Indexed: 11/30/2022]
|
33
|
|
34
|
Elahi MF, Guan G, Wang L, King MW. Improved hemocompatibility of silk fibroin fabric using layer-by-layer polyelectrolyte deposition and heparin immobilization. J Appl Polym Sci 2014. [DOI: 10.1002/app.40772] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- M. Fazley Elahi
- Key Laboratory of Textile Science and Technology; Ministry of Education, College of Textiles, Donghua University; Songjiang District Shanghai 201620 China
| | - Guoping Guan
- Key Laboratory of Textile Science and Technology; Ministry of Education, College of Textiles, Donghua University; Songjiang District Shanghai 201620 China
| | - Lu Wang
- Key Laboratory of Textile Science and Technology; Ministry of Education, College of Textiles, Donghua University; Songjiang District Shanghai 201620 China
| | - Martin W. King
- Key Laboratory of Textile Science and Technology; Ministry of Education, College of Textiles, Donghua University; Songjiang District Shanghai 201620 China
- College of Textiles, North Carolina State University; Raleigh North Carolina 27695-8301
| |
Collapse
|
35
|
Elahi MF, Guan G, Wang L, King MW. Influence of Layer-by-Layer Polyelectrolyte Deposition and EDC/NHS Activated Heparin Immobilization onto Silk Fibroin Fabric. Materials (Basel) 2014; 7:2956-2977. [PMID: 28788601 PMCID: PMC5453351 DOI: 10.3390/ma7042956] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Revised: 03/25/2014] [Accepted: 03/31/2014] [Indexed: 01/07/2023]
Abstract
To enhance the hemocompatibility of silk fibroin fabric as biomedical material, polyelectrolytes architectures have been assembled through the layer-by-layer (LbL) technique on silk fibroin fabric (SFF). In particular, 1.5 and 2.5 bilayer of oppositely charged polyelectrolytes were assembled onto SFF using poly(allylamine hydrochloride) (PAH) as polycationic polymer and poly(acrylic acid) (PAA) as polyanionic polymer with PAH topmost. Low molecular weight heparin (LMWH) activated with 1-ethyl-3-(dimethylaminopropyl) carbodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS) was then immobilized on its surface. Alcian Blue staining, toluidine blue assay and X-ray photoelectron spectroscopy (XPS) confirmed the presence of heparin on modified SFF surfaces. The surface morphology of the modified silk fibroin fabric surfaces was characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM), and obtained increased roughness. Negligible hemolytic effect and a higher concentration of free hemoglobin by a kinetic clotting time test ensured the improved biological performance of the modified fibroin fabric. Overall, the deposition of 2.5 bilayer was found effective in terms of biological and surface properties of the modified fibroin fabric compared to 1.5 bilayer self-assembly technique. Therefore, this novel approach to surface modification may demonstrate long term patency in future in vivo animal trials of small diameter silk fibroin vascular grafts.
Collapse
Affiliation(s)
- M Fazley Elahi
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Songjiang District, Shanghai 201620, China.
| | - Guoping Guan
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Songjiang District, Shanghai 201620, China.
| | - Lu Wang
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Songjiang District, Shanghai 201620, China.
| | - Martin W King
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Songjiang District, Shanghai 201620, China.
- College of Textiles, North Carolina State University, Raleigh, NC 27695-8301, USA.
| |
Collapse
|
36
|
Yao T, Choules BD, Rust JP, King MW. The development of anin vitrotest method for predicting the abrasion resistance of textile and metal components of endovascular stent grafts. J Biomed Mater Res B Appl Biomater 2013; 102:488-99. [PMID: 24115449 DOI: 10.1002/jbm.b.33026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Revised: 06/20/2013] [Accepted: 08/01/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Tong Yao
- College of Textiles; North Carolina State University; Raleigh North Carolina 27695
| | | | - Jon P. Rust
- College of Textiles; North Carolina State University; Raleigh North Carolina 27695
| | - Martin W. King
- College of Textiles; North Carolina State University; Raleigh North Carolina 27695
- College of Textiles; Donghua University; Shanghai 201620 People's Republic of China
| |
Collapse
|
37
|
Yang X, Wang L, Guan G, King MW, Li Y, Peng L, Guan Y, Hu X. Preparation and evaluation of bicomponent and homogeneous polyester silk small diameter arterial prostheses. J Biomater Appl 2013; 28:676-87. [PMID: 23292721 DOI: 10.1177/0885328212472216] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The development of a small diameter (≤5 mm) arterial prosthesis requires the appropriate selection of materials, structure and fabrication method so as to provide adequate mechanical properties, superior biocompatibility and precise control over the diameter. In this study, 100% polyester, 100% silk fibroin and a combination of both yarns were woven into seamless tubular prototype prostheses with different basic weaves. After degumming/scouring they met a target inner diameter of 3.9±0.3 mm which demonstrates that weaving is a precise way to manufacture small caliber arterial prostheses. In conclusion, the bicomponent polyester/silk woven samples had superior mechanical properties and improved cytocompatibility compared to commercial ePTFE devices.
Collapse
Affiliation(s)
- Xiaoyuan Yang
- 1Key Lab of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, China
| | | | | | | | | | | | | | | |
Collapse
|
38
|
Abramson S, Ackermann DM, Akins R, Anders R, Andersen PJ, Anderson JM, Ankrum JA, Anseth KS, Antonucci J, Atzet S, Badylak SF, Baura GD, Bellamkonda RV, Best SM, Bhumiratana S, Bianco RW, Bokros JC, Borovetz HS, Boskey AL, Brown JL, Brown BN, Brown SA, Brunski JB, Cahn F, Ritchie AC, Caplan AI, Carpenedo RL, Chilkoti A, Chung S, Cimetta E, Cleary G, Clements IP, Colas A, Coleman KP, Conway DE, Cooper SL, Costerton B, Coury AJ, Cunanan C, Curtis J, D’Amore A, DeMeo P, Desai TA, Dickens S, Domingo G, Duncan E, Eskin SG, Feigal DW, Ferreira L, Fuller J, Gallegos RP, Gawalt E, Ghosh K, Ghosn B, Gilbert TW, Glaser DE, Godier-Furnemont A, Gombotz WR, Grainger DW, Grunkemeier GL, Hacking SA, Hallab NJ, Hall-Stoodley L, Hanson SR, Haubold AD, Hauch KD, Hawkins KR, Heath DE, Helm DL, Hench LL, Hensten A, Hill RT, Hobson C, Hoerstrup SP, Hoffman AS, Horbett TA, Hubbell JA, Humayun MS, Ideker R, Ingber DE, Jain R, Jacob J, Jacobs JJ, Jacobsen N, Jin R, Johnson RJ, Karp JM, Kasper FK, Kathju S, Khademhosseini A, Kim S, King MW, Kleiner LW, Kohn J, Koschwanez HE, Kumbar SG, Kuo CK, LaFleur L, Lahti MT, Lambert B, Langer R, Laurencin CT, Lee-Parritz D, Lemons JE, Levin M, Levy RJ, Lewerenz GM, Li WJ, Lin CC, Liu F, Lowrie WG, Lu Y, Lysaght MJ, Maidhof R, Mansbridge J, Cristina M, Martins L, Martin J, Mayesh JP, McDevitt TC, McIntire LV, Merrit K, Migliaresi C, Mikos AG, Misch CE, Mitchell RN, More RB, Moss CW, Munson JM, Navarro M, Nerem RM, Ogawa R, Orgill BD, Orgill DP, Padera RF, Pandit A, Park K, Patel AS, Peck RB, Peckham PH, Peppas NA, Pereira MN, Planell J, Popat KC, Prestwich GD, Pun SH, Rabolt J, Rainbow RS, Rajab T, Ratner BD, Reichert WM, Rivard AL, Rowley AP, Ruan G, Sacks M, Sarkar D, Schaefer S, Schmidt CE, Schoen FJ, Schutte SC, Sefton MV, Shalaby SW, Shirtliff M, Simon MA, Singh M, Slack SM, Spelman FA, Starr A, Stayton PS, Steinert R, Stoodley P, Suri S, Swi Chang TM, Tandon N, Tanguay AR, Taylor MS, Teo GS, Thodeti CK, Tolkoff J, Treiser M, Tuan RS, Tucker EI, Venugopalan R, Vicari AR, Viney C, Voight JM, Vunjak-Novakovic G, Wagner WR, Wang L, Wasiluk KR, Watts DC, Weigl BH, Weiland JD, Whalen JJ, Williams DF, Williams RL, Wilson JT, Wilson CG, Winter J, Wolf MF, Wright JC, Yager P, Zhao W. Contributors. Biomater Sci 2013. [DOI: 10.1016/b978-0-08-087780-8.00150-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
39
|
Chung S, King MW. Design concepts and strategies for tissue engineering scaffolds. Biotechnol Appl Biochem 2011; 58:423-38. [PMID: 22172105 DOI: 10.1002/bab.60] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Accepted: 09/23/2011] [Indexed: 12/11/2022]
Abstract
In the emerging field of tissue engineering and regenerative medicine, new viable and functional tissue is fabricated from living cells cultured on an artificial matrix in a simulated biological environment. It is evident that the specific requirements for the three main components, cells, scaffold materials, and the culture environment, are very different, depending on the type of cells and the organ-specific application. Identifying the variables within each of these components is a complex and challenging assignment, but there do exist general requirements for designing and fabricating tissue engineering scaffolds. Therefore, this review explores one of the three main components, namely, the key concepts, important parameters, and required characteristics related to the development and evaluation of tissue engineering scaffolds. An array of different design strategies will be discussed, which include mimicking the extra cellular matrix, responding to the need for mass transport, predicting the structural architecture, ensuring adequate initial mechanical integrity, modifying the surface chemistry and topography to provide cell signaling, and anticipating the material selection so as to predict the required rate of bioresorption. In addition, this review considers the major challenge of achieving adequate vascularization in tissue engineering constructs, without which no three-dimensional thick tissue such as the heart, liver, and kidney can remain viable.
Collapse
Affiliation(s)
- Sangwon Chung
- Fiber and Polymer Science, Department of Textile Engineering, Chemistry and Science, North Carolina State University, Raleigh, NC 27695-8301, USA
| | | |
Collapse
|
40
|
Abstract
A novel prototype nonwoven textile structure containing polylactide (PLA) multigrooved fibers has been proposed as a possible scaffold material for superior cell attachment and proliferation. Grooved cross-sectional fibers with larger surface area were obtained by a bi-component spinning system and the complete removal of the sacrificial component was confirmed by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and x-ray photon spectroscopy (XPS) analysis. These PLA nonwoven scaffolds containing the grooved fibers exhibited enhanced wettability, greater flexibility and tensile properties, and a larger surface area compared to a traditional PLA nonwoven fabric containing round fibers. To evaluate cellular attachment on the two types of PLA nonwoven scaffolds, NIH 3T3 fibroblasts were cultured for up to 12 days. It was evident that the initial cellular attachment was superior on the scaffold with grooved fibers, which was confirmed by MTT viability assay (p < 0.01) and SEM analysis. In the future, by modulating the size of the grooves on the fibers, such a scaffold material with a large surface area could serve as an alternative matrix for culturing different types of cells.
Collapse
Affiliation(s)
- Sangwon Chung
- Fiber and Polymer Science, North Carolina State University, Raleigh, NC, USA
| | | | | |
Collapse
|
41
|
Yoon H, King MW, Michielsen S, El-Shafei A, Johnson E. Influence of surface modification on the adhesion between Nitinol wire and fluoropolymer films. J Appl Biomater Biomech 2010; 8:7-13. [PMID: 20740416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
PURPOSE One of the current challenges for the medical device industry is how to manufacture and assemble biomedical implants consisting of a metallic wire component and a fluorocarbon film without the use of an adhesive. In an attempt to answer this question, samples of Nitinol wire and fluorinated ethylene-propylene (FEP) film were surface modified by various treatments before being thermally bonded into a composite pull-out strength test specimen and mechanically tested to determine their adhesion strength. METHODS The two surface treatments for Nitinol wire included mechanical roughening with sandpaper, and adding a fluorocarbon coating followed by polymerization and curing by a helium plasma treatment. The two surface treatments for FEP film included helium plasma and helium-oxygen plasma under atmospheric conditions. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and contact angle measurements were also taken to characterize the appearance and chemistry of the surfaces before and after modification. A unique pull-out strength test method was developed to assess the level of adhesion between these various candidates. RESULTS The pull-out force for untreated Nitinol bonded to untreated FEP film was 30.5 +/- 2.4 N. Significant improvements of up to 14% in this level of adhesion were obtained with the mechanically roughened Nitinol wire bonded to the helium plasma treated films. However, coating the wire with a liquid fluorocarbon monomer mixture (TG-10) was not successful and after thermal bonding to FEP film the level of adhesion decreased by over 80%. CONCLUSIONS Thus, the bonding strength between the wire and the film can be significantly improved by mechanically roughening the Nitinol wire and treating the FEP film with helium plasma prior to thermal bonding.
Collapse
Affiliation(s)
- Hyounil Yoon
- College of Textiles, North Carolina State University, Raleigh, NC 27695-8301, USA
| | | | | | | | | |
Collapse
|
42
|
Chung S, Moghe AK, Montero GA, Kim SH, King MW. Nanofibrous scaffolds electrospun from elastomeric biodegradable poly(L-lactide-co-ε-caprolactone) copolymer. Biomed Mater 2009; 4:015019. [DOI: 10.1088/1748-6041/4/1/015019] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
43
|
Zhao H, Wang L, Li Y, Liu X, King MW. The Mathematical Model for Evaluating Fatigue Resistance of SG Tubular Fabric: Relationship between Textile Parameters and Fatigue Performance. J Biomater Appl 2008; 24:579-90. [DOI: 10.1177/0885328208099437] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Fatigue testing for twelve SG tubular fabrics with various textile parameters was performed under pulsatile pressure by an Accelerated fatigue tester. Two time points as of 0, and 1 × 108 cycles were selected. The percentage change of tubular diameter, fabric count, porosity, and water permeability before and after the fatigue testing were used to characterize the fatigue performance. Bursting work was used to indicate fatigue. The mathematical model of quantification theory I was used to analyze the influence of various textile parameters on the fatigue performance of SG tubular fabric. It was found that with the increase of fatigue time, bursting work decreased, and the predicting results by quantification theory I for the fatigue resistance were relatively accurate and the contribution ratio of each textile parameter to the fatigue performance was also obtained. Different textile parameter has different contribution ratio if different parameters were used to characterize the fatigue performance. Woven construction had more influence than yarn size on the fatigue performance, and yarn type had the least influence on it. Woven construction, yarn size, and yarn type had interactive influence on the fatigue performance. This can provide theoretical foundation for making better fatigue resistant SG tubular fabrics.
Collapse
Affiliation(s)
- Huijing Zhao
- Key Lab of Textile Science and Technology, Ministry of Education College of Textiles, Donghua University, Shanghai, 201620
| | - Lu Wang
- Key Lab of Textile Science and Technology, Ministry of Education College of Textiles, Donghua University, Shanghai, 201620,
| | - Yuling Li
- Key Lab of Textile Science and Technology, Ministry of Education College of Textiles, Donghua University, Shanghai, 201620
| | - Xiaoyan Liu
- Key Lab of Textile Science and Technology, Ministry of Education College of Textiles, Donghua University, Shanghai, 201620
| | - Martin W. King
- Key Lab of Textile Science and Technology, Ministry of Education College of Textiles, Donghua University, Shanghai, 201620, College of Textiles, North Carolina State University, Raleigh 27695, USA
| |
Collapse
|
44
|
Traoré AS, Guidoin MF, Marois Y, Zhang Z, Douville Y, Guidoin R, King MW, Legrand AP. Newly developed hybrid suture without lubricant: noninvasive in vivo assessment of biocompatibility with multiparametric MR imaging. J INVEST SURG 2007; 20:121-33. [PMID: 17454397 DOI: 10.1080/08941930701235924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Magnetic resonance imaging (MRI) and magnetic resonance (MR) relaxometry were used to assess noninvasively the tissue response of a new uncoated hybrid braided suture made from a combination of ultra-high-molecular-weight polyethylene (UHMWPE) and polyester (polyethylene terephthalate) (PET) yarns in comparison to a silicone impregnated braided 100% polyester (PET) control suture (Ticron). Both biomaterials were monitored for a period of 30 days following implantation in both incised and nonincised paravertebral rabbit muscles. In all cases, MR images and relaxometry demonstrated that the hybrid suture elicited either a milder or a similar tissue and cellular response compared to the control suture. These findings were confirmed by conventional histological analysis of the surrounding tissues. They also demonstrated that the hybrid suture promoted faster healing in terms of collagen infiltration between the yarns and individual filaments. This milder inflammatory reaction and improved biocompatibility represent a real advantage in the healing performance of sutures for cardiac and vascular surgery, and support the need for continued research and development of hybrid structures. This study also demonstrated the ability of MRI techniques to noninvasively evaluate the biocompatibility of biomaterials. By extending the capacity of MR diagnostic tools from patients to experimental animals, it is now possible to validate the healing performance of foreign materials with statistical reliability and fewer animals.
Collapse
Affiliation(s)
- Amidou S Traoré
- Department of Surgery, Laval University, and Quebec Biomaterials Institute St François d'Assise Hospital, CHUQ, Quebec City, Quebec, Canada
| | | | | | | | | | | | | | | |
Collapse
|
45
|
Brannon KM, Million Passe CM, White CR, Bade NA, King MW, Quirk CC. Expression of the high mobility group A family member p8 is essential to maintaining tumorigenic potential by promoting cell cycle dysregulation in LbetaT2 cells. Cancer Lett 2007; 254:146-55. [PMID: 17451874 DOI: 10.1016/j.canlet.2007.03.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2006] [Revised: 03/02/2007] [Accepted: 03/06/2007] [Indexed: 10/23/2022]
Abstract
The mechanism by which the HMGA protein p8 facilitates tumorigenesis may be cell cycle dysregulation. Control- (C) LbetaT2 cells, which express p8, form tumors at a rate five-times faster than p8-knockdown (p8-KD)-LbetaT2 cells. In association with this heightened tumorigenic potential, p8-expressing C-LbetaT2 cells avoid G(0)/G(1) arrest and become genetically unstable while p8-KD-LbetaT2 cells arrest in G(0)/G(1), become senescent upon overgrowth, and maintain a diploid population. These phenotypic changes correspond to altered cell cycle regulation at the G(1)-to-S transition that may be due to p8-mediated changes in expression of the Cip/Kip family members of cell cycle inhibitors, p21, p27, and p57.
Collapse
Affiliation(s)
- K M Brannon
- Department of Biology, Indiana University, Bloomington, IN 47405-4401, USA
| | | | | | | | | | | |
Collapse
|
46
|
|
47
|
Krishnan P, King MW, Neff AW, Sandusky GE, Bierman KL, Grinnell B, Smith RC. Human truncated Smad 6 (Smad 6s) inhibits the BMP pathway in Xenopus laevis. Dev Growth Differ 2001; 43:115-32. [PMID: 11284962 DOI: 10.1046/j.1440-169x.2001.00562.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A previously identified truncated form of the human Smad 6 gene containing a unique 12 amino acid motif at its N-terminus was studied. We have named this truncated form of the gene Smad 6s, for 'short-form', to distinguish it from the full-length form (Smad 6fl). Reverse transcription-polymerase chain reaction and immunohistochemistry revealed that Smad 6s has a unique pattern of expression in human coronary tissue and is upregulated in diseased heart tissue. We used the expression of human Smad 6s in Xenopus laevis as a model system to assess Smad 6s function. Injection of Smad 6fl RNA (4-cell embryos, 2 x ventral) produced tadpoles with partial secondary axes. In contrast, Smad 6s RNA injected in a similar manner produced tadpoles with a severe 'head-only' phenotype with no morphological appearance of a secondary axis. Mutant Smad 6s RNA lacking the unique 12 amino acids at the N-terminus of the Smad 6s isoform produced no embryonic phenotype, suggesting that this region is important in conferring biological activity. Ectodermal explant assays show that Smad 6s has activity consistent with being a BMP antagonist and can synergize with and enhance the activities of the activin and fibroblast growth factor pathways, all of which are novel findings in this study.
Collapse
Affiliation(s)
- P Krishnan
- Bio-Research Technologies & Protein, Lilly Research Laboratories, Lilly Corporate Center, Eli Lilly & Company, Indianapolis, Indiana 46285, USA
| | | | | | | | | | | | | |
Collapse
|
48
|
Abstract
The present retrospective analysis of 117 surgically excised anterior cruciate ligament (ACL) prostheses was designed to elucidate the etiology and mechanisms of failure of synthetic ligamentous prostheses. They were harvested from young and active patients (26 +/- 7 yrs) at various orthopaedic centers in France between 1983 and 1993. The average duration of implantation of augmentation and replacement prostheses were 21.5 +/- 12.6 and 33.2 +/- 25.3 months, respectively. The principal causes for their excision were ruptures and synovitis. Each ACL prosthesis was examined macroscopically, histologically, and, after tissue removal, by scanning electron microscopy (SEM) to determine the model, manufacturer, surgical technique used at implantation, the extent of healing, the site of rupture, and the morphology of the damaged fibers. Fourteen types of ACL prostheses were analysed, each fabricated using a different combination of polymers, fibers and textile constructions. Consequently, they generated a variety of healing characteristics and mechanical responses in vivo. SEM observations revealed that abrasion of the textile fibers as a result of yarn-on-yarn and/or yarn-on-bone contact was a common phenomenon to almost all models, and was the primary cause of prosthetic failure. Healing inside the synthetic ACL was poorly organized, incomplete and unpredictable as the extent of collagenous infiltration into the textile structure did not increase with the duration of implantation. In fact, the collagenous infiltration into certain models appeared to be more detrimental than beneficial since it caused deterioration and fraying of the textile structure rather than serving as a reinforcing matrix around the prosthesis. In conclusion, the present study shows that three mechanisms may be involved in the failure of ACL prostheses: (1) inadequate fiber abrasion resistance against osseous surfaces; (2) flexural and rotational fatigue of the fibers, and (3) loss of integrity of the textile structure due to unpredictable tissue infiltration during healing.
Collapse
Affiliation(s)
- M F Guidoin
- Department of Surgery, Laval University, Quebec, QC, Canada
| | | | | | | | | | | |
Collapse
|
49
|
Bélanger MC, Marois Y, Roy R, Mehri Y, Wagner E, Zhang Z, King MW, Yang M, Hahn C, Guidoin R. Selection of a polyurethane membrane for the manufacture of ventricles for a totally implantable artificial heart: blood compatibility and biocompatibility studies. Artif Organs 2000; 24:879-88. [PMID: 11119076 DOI: 10.1046/j.1525-1594.2000.06504.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Membranes made from 4 commercial poly(carbonate urethanes): Carbothane (CB), Chronoflex (CF), Corethane 80A (CT80), and Corethane 55D (CT55), and from 2 poly(ether urethanes): Tecoflex (TF) and Tecothane (TT) were prepared by solution casting and sterilized by either ethylene oxide (EO) or gamma radiation. Their biocompatibility was evaluated in vitro in terms of proliferation, cell viability, and adhesion characteristics of human umbilical veins (HUVEC), monocytes (THP-1), and skin fibroblasts, and by measuring complement activation through the generation of the C3a complex. Their hemocompatibility was determined by measuring the level of radiolabeled platelet, neutrophil, and fibrin adhesion in an ex vivo arteriovenous circuit study in piglets as well as via an in vitro hemolysis test. The results of this study showed no endothelial cell proliferation on any of the materials. The cell viability study revealed that the CB, CF, and TF membranes sterilized by EO maintained the highest percentage of monocyte viability after 72 h of incubation (>70%) while none of the gamma-sterilized membranes displayed any cell viability. The fibroblast adhesion and C3a generation assays revealed that none of the materials supported any cell adhesion or activated complement, regardless of the sterilization method. The hemolysis test also confirmed that the 4 poly(carbonate urethanes) were hemolytic while none of the poly(ether urethanes) were. Finally, the ex vivo study revealed that significantly more platelets adhered to the CB and CT55 membranes while the levels of neutrophil and fibrin deposition were observed to be similar for all 6 materials. In conclusion, the study identified the CF and TF membranes as having superior biocompatibility and hemocompatibility compared to the other polyurethanes.
Collapse
Affiliation(s)
- M C Bélanger
- Department of Surgery, Faculty of Medicine, Laval University and the Quebec Biomaterials Institute, Saint-François d'Assise Hospital, CHUQ, Quebec, Canada
| | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Marois Y, Cadi R, Gourdon J, Fatouraee N, King MW, Zhang Z, Guidoin R. Biostability, inflammatory response, and healing characteristics of a fluoropassivated polyester-knit mesh in the repair of experimental abdominal hernias. Artif Organs 2000; 24:533-43. [PMID: 10916064 DOI: 10.1046/j.1525-1594.2000.06547.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The present study was undertaken to validate the benefits of a fluoropolymer treatment on the biostability, inflammatory response, and healing characteristics of a polyester mesh used for hernia repair, the Fluoromesh, as compared to a commercial monofilament-knit polypropylene mesh, Marlex, used as the control. Both were implanted for the repair of surgically induced abdominal hernias in piglets for prescheduled durations of implantation of 4, 15, and 60 days. The mesh and surrounding tissue were harvested at the sacrifice for the bursting strength and inflammatory response measurements in terms of alkaline and acid phosphatase secretion in the tissue, and for histological observations of the healing sequence and tissue thickness measurements by histomorphometric techniques. After cleaning to remove adherent tissue, the presence of the fluoropolymer at the surface of the mesh was detected using SEM and ESCA. The results demonstrated greater mechanical reinforcement and tissue development for the Fluoromesh than for the polypropylene mesh. The healing performance of the Fluoromesh was attributed to a more intense chronic inflammatory reaction early after implantation that stimulated significantly greater tissue ingrowth and integration. The concentration of fluoropolymer at the surface of the mesh was masked as a result of biological species adsorption. Textile analysis revealed that the Fluoromesh was dimensionally more stable in vivo than the polypropylene control mesh, which demonstrated stretching in the weft direction and shrinking in the warp direction during implantation.
Collapse
Affiliation(s)
- Y Marois
- Department of Surgery, Faculty of Medicine, Laval University and Québec Biomaterials Institute, Pavillon Saint-François d'Assise, CHUQ., Québec City, Québec, Canada
| | | | | | | | | | | | | |
Collapse
|