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Cartwright AF, Callahan RL, Lawton A, Wong C, Muchiri O, Matan S. Assessing Acceptability of Biodegradable Contraceptive Implants in Kenya and Senegal. GLOBAL HEALTH, SCIENCE AND PRACTICE 2024:GHSP-D-23-00503. [PMID: 39009469 DOI: 10.9745/ghsp-d-23-00503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 06/11/2024] [Indexed: 07/17/2024]
Abstract
BACKGROUND Contraceptive implants are popular in Africa, but barriers to removal exist. Biodegradable implants (BDIs) offer an alternative to the need for removal. This study explored potential user, provider, and other stakeholder perspectives on 2 BDI prototypes, revealing opportunities and challenges for introduction. METHODS We conducted focus group discussions (FGDs) and in-depth interviews (IDIs) with women, men, family planning (FP) providers, community influencers, and FP policymakers and program staff in Kenya and Senegal. Characteristics of the 2 BDI prototypes were shared, and participants held and interacted with placebo prototypes. Structural coding was used to analyze the data focused on key product attributes, including biodegradation, removal potential, size, material, insertion site, and duration of effectiveness. RESULTS We conducted 16 FGDs and 35 IDIs with 106 participants in Kenya and 15 FGDs and 43 IDIs with 102 participants in Senegal. Overall, respondents liked the idea of a BDI, noting the avoidance of pain and scarring and reduced transport and costs as benefits of no removal requirement. Kenyan respondents expressed greater understanding of the biodegradation process than those in Senegal, though potential users in both countries expressed concerns about possible side effects associated with the process. In Senegal, mention of cholesterol in a BDI caused concern, while Kenyan participants responded positively to the same BDI being composed of organic materials. The second BDI product was viewed as more similar to existing implants, which providers preferred. Participants suggested increasing the pregnancy protection duration beyond 18 months. No clear preference between products emerged, and participants liked and disliked some characteristics of both. CONCLUSIONS Kenyan and Senegalese participants expressed interest in the BDI concept but expressed some reservations related to biodegradation, material, and side effects. BDIs offer the opportunity to expand contraceptive choice. However, messaging around product characteristics will be required for successful introduction and uptake.
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Wang H, Huddleston S, Yang J, Ameer GA. Enabling Proregenerative Medical Devices via Citrate-Based Biomaterials: Transitioning from Inert to Regenerative Biomaterials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2306326. [PMID: 38043945 DOI: 10.1002/adma.202306326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 10/03/2023] [Indexed: 12/05/2023]
Abstract
Regenerative medicine aims to restore tissue and organ function without the use of prosthetics and permanent implants. However, achieving this goal has been elusive, and the field remains mostly an academic discipline with few products widely used in clinical practice. From a materials science perspective, barriers include the lack of proregenerative biomaterials, a complex regulatory process to demonstrate safety and efficacy, and user adoption challenges. Although biomaterials, particularly biodegradable polymers, can play a major role in regenerative medicine, their suboptimal mechanical and degradation properties often limit their use, and they do not support inherent biological processes that facilitate tissue regeneration. As of 2020, nine synthetic biodegradable polymers used in medical devices are cleared or approved for use in the United States of America. Despite the limitations in the design, production, and marketing of these devices, this small number of biodegradable polymers has dominated the resorbable medical device market for the past 50 years. This perspective will review the history and applications of biodegradable polymers used in medical devices, highlight the need and requirements for regenerative biomaterials, and discuss the path behind the recent successful introduction of citrate-based biomaterials for manufacturing innovative medical products aimed at improving the outcome of musculoskeletal surgeries.
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Affiliation(s)
- Huifeng Wang
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Samantha Huddleston
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Jian Yang
- Biomedical Engineering Program, School of Engineering, Westlake University, Hangzhou, Zhejiang, 310030, China
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang, 310030, China
| | - Guillermo A Ameer
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
- Chemistry of Life Processes Institute, Northwestern University, Evanston, IL, 60208, USA
- Simpson Querrey Institute, Northwestern University, Chicago, IL, 60611, USA
- International Institute for Nanotechnology, Northwestern University, Evanston, IL, 60208, USA
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Lau CS, Chua J, Prasadh S, Lim J, Saigo L, Goh BT. Alveolar Ridge Augmentation with a Novel Combination of 3D-Printed Scaffolds and Adipose-Derived Mesenchymal Stem Cells-A Pilot Study in Pigs. Biomedicines 2023; 11:2274. [PMID: 37626770 PMCID: PMC10452669 DOI: 10.3390/biomedicines11082274] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/01/2023] [Accepted: 08/10/2023] [Indexed: 08/27/2023] Open
Abstract
Alveolar ridge augmentation is an important dental procedure to increase the volume of bone tissue in the alveolar ridge before the installation of a dental implant. To meet the high demand for bone grafts for alveolar ridge augmentation and to overcome the limitations of autogenous bone, allografts, and xenografts, researchers are developing bone grafts from synthetic materials using novel fabrication techniques such as 3D printing. To improve the clinical performance of synthetic bone grafts, stem cells with osteogenic differentiation capability can be loaded into the grafts. In this pilot study, we propose a novel bone graft which combines a 3D-printed polycaprolactone-tricalcium phosphate (PCL-TCP) scaffold with adipose-derived mesenchymal stem cells (AD-MSCs) that can be harvested, processed and implanted within the alveolar ridge augmentation surgery. We evaluated the novel bone graft in a porcine lateral alveolar defect model. Radiographic analysis revealed that the addition of AD-MSCs to the PCL-TCP scaffold improved the bone volume in the defect from 18.6% to 28.7% after 3 months of healing. Histological analysis showed the presence of AD-MSCs in the PCL-TCP scaffold led to better formation of new bone and less likelihood of fibrous encapsulation of the scaffold. Our pilot study demonstrated that the loading of AD-MSCs improved the bone regeneration capability of PCL-TCP scaffolds, and our novel bone graft is suitable for alveolar ridge augmentation.
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Affiliation(s)
- Chau Sang Lau
- National Dental Research Institute Singapore, National Dental Centre Singapore, Singapore 168938, Singapore; (C.S.L.); (L.S.)
- Oral Health Academic Clinical Programme, Duke-NUS Medical School, Singapore 169857, Singapore
| | - Jasper Chua
- Duke-NUS Medical School, Singapore 169857, Singapore;
| | - Somasundaram Prasadh
- Center for Clean Energy Engineering, University of Connecticut, Storrs, CT 06269, USA;
| | - Jing Lim
- Osteopore International Pte Ltd., Singapore 618305, Singapore;
| | - Leonardo Saigo
- National Dental Research Institute Singapore, National Dental Centre Singapore, Singapore 168938, Singapore; (C.S.L.); (L.S.)
| | - Bee Tin Goh
- National Dental Research Institute Singapore, National Dental Centre Singapore, Singapore 168938, Singapore; (C.S.L.); (L.S.)
- Oral Health Academic Clinical Programme, Duke-NUS Medical School, Singapore 169857, Singapore
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Pothupitiya JU, Zheng C, Saltzman WM. Synthetic biodegradable polyesters for implantable controlled-release devices. Expert Opin Drug Deliv 2022; 19:1351-1364. [PMID: 36197839 DOI: 10.1080/17425247.2022.2131768] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION : Implantable devices can be designed to release drugs to localized regions of tissue at sustained and reliable rates. Advances in polymer engineering have led to the design and development of drug-loaded implants with predictable, desirable release profiles. Biodegradable polyesters exhibit chemical, physical, and biological properties suitable for developing implants for pain management, cancer therapy, contraception, antiviral therapy, and other applications. AREAS COVERED : This article reviews the use of biodegradable polyesters for drug-loaded implants by discussing the properties of commonly used polymers, techniques for implant formulation and manufacturing, mechanisms of drug release, and clinical applications of implants as drug delivery devices. EXPERT OPINION : Drug delivery implants are unique systems for safe and sustained drug release, providing high bioavailability and low toxicity. Depending on the implant design and tissue site of deployment, implants can offer either localized or systemic drug release. Due to the long history of use of degradable polyesters in medical devices, polyester-based implants represent an important class of controlled release technologies. Further, polyester-based implants are the largest category of drug delivery implants to reach the point of testing in humans or approval for human use.
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Affiliation(s)
- Jinal U Pothupitiya
- Department of Biomedical Engineering, Yale University; New Haven, CT 06511, USA
| | - Christy Zheng
- Department of Biomedical Engineering, Yale University; New Haven, CT 06511, USA
| | - W Mark Saltzman
- Department of Biomedical Engineering, Yale University; New Haven, CT 06511, USA
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5
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Rahman-Yildir J, Fischer B, Breitkreutz J. Development of sustained-release drug-loaded intravesical inserts via semi-solid micro-extrusion 3D-printing for bladder targeting. Int J Pharm 2022; 622:121849. [PMID: 35618176 DOI: 10.1016/j.ijpharm.2022.121849] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/17/2022] [Accepted: 05/18/2022] [Indexed: 12/31/2022]
Abstract
Discontinued treatment and non-adherence are oftentimes weaknesses of common first-line drug therapy against bladder conditions due to their negative side-effects. To overcome these limitations and increase patients' quality of life, intravesical therapies are continuously being explored. 3D-printing offers the possibility of freely tailoring drug delivery systems to manufacture indwelling devices that may administer drugs locally over an extended time and avoiding frequently repeated administrations while minimizing systemic side-effects. In the present work, pressure-assisted micro syringe printing has been used to develop flexible drug-loaded inserts applicable via common urinary catheter that can remain up to several weeks inside the urinary bladder. Three APIs (lidocaine hydrochloride, trospium chloride (TrCl) and hydrochlorothiazide (HCT)) with different properties and solubilities were investigated for their applicability together with two different pharmaceutical polymers (biodegradable polycaprolactone (PCL) and non-degradable ethylene vinyl acetate copolymer (EVA)). The fastest release was thereby observed for the PCL-TrCl combination and the slowest for EVA-HCT depending on the API's solubility in the dissolution medium and formation of API clusters within the matrix. It was further demonstrated that the dissolution profile could be modified by adapting drug loads between 5 and 15 % or the geometry of the printed inserts indicating the possibility of tailoring release profiles.
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Affiliation(s)
- Jhinuk Rahman-Yildir
- Institute of Pharmaceutics and Biopharmaceutics, Heinrich Heine University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany; Drug Delivery Innovation Center (DDIC), INVITE GmbH, Chempark Building W 32, 51368 Leverkusen, Germany
| | - Björn Fischer
- Institute of Pharmaceutics and Biopharmaceutics, Heinrich Heine University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany; FISCHER GmbH, Raman Spectroscopic Services, 40667 Meerbusch, Germany
| | - Jörg Breitkreutz
- Institute of Pharmaceutics and Biopharmaceutics, Heinrich Heine University Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany.
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Lau CS, Chua J, Pena EM, Lim J, Saigo L, Goh BT. A Porcine Model Using Adipose Stem Cell-Loaded Scaffolds for Alveolar Ridge Augmentation. Tissue Eng Part C Methods 2022; 28:228-237. [PMID: 35442100 DOI: 10.1089/ten.tec.2022.0062] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Tooth loss greatly affects a person's quality of life and many turn to dental implants to replace lost teeth. The success of a dental implant depends on the amount of alveolar bone supporting the implant, and thus, bone augmentation is often necessary to preserve or build up bone volume in the alveolar ridge. Bone can be augmented with autogenous bone, allografts, or xenografts, but the limitations of such natural bone grafts prompt researchers to develop synthetic scaffolds supplemented with cells and/or bioactive agents as alternative bone grafts. The translation of these combination scaffolds from the laboratory to the clinic requires reliable experimental models that can simulate the clinical conditions in human patients. In this article, we describe the use of a porcine alveolar defect model as a platform to evaluate the efficacy of a novel combination of a three-dimensional-printed polycaprolactone-tricalcium phosphate (PCL-TCP) scaffold and adipose-derived mesenchymal stem cells (AD-MSCs) in lateral alveolar augmentation. The surgical protocol for the defect creation and regenerative surgery, as well as analytical methods to determine the extent of tissue regeneration, are described and discussed.
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Affiliation(s)
- Chau Sang Lau
- Oral Health Academic Clinical Programme, Duke-NUS Medical School, Singapore, Singapore.,National Dental Research Institute Singapore, National Dental Centre Singapore, Singapore, Singapore
| | - Jasper Chua
- National Heart Research Institute Singapore, National Heart Centre Singapore, Singapore, Singapore.,Cardiovascular and Metabolic Disorder Programme, Duke-NUS Medical School, Singapore, Singapore
| | - Edgar Macabe Pena
- SingHealth Experimental Medicine Centre and National Large Animal Research Facility, Singapore Health Services Pte Ltd., Singapore, Singapore
| | - Jing Lim
- Osteopore International Pte Ltd., Singapore, Singapore
| | - Leonardo Saigo
- Department of Oral and Maxillofacial Surgery, National Dental Centre Singapore, Singapore, Singapore
| | - Bee Tin Goh
- Oral Health Academic Clinical Programme, Duke-NUS Medical School, Singapore, Singapore.,National Dental Research Institute Singapore, National Dental Centre Singapore, Singapore, Singapore.,Department of Oral and Maxillofacial Surgery, National Dental Centre Singapore, Singapore, Singapore
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Biodegradation of poly(L-lactic acid) and poly(ε-caprolactone) patches by human amniotic fluid in an in-vitro simulated fetal environment. Sci Rep 2022; 12:3950. [PMID: 35273223 PMCID: PMC8913814 DOI: 10.1038/s41598-022-07681-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 01/04/2022] [Indexed: 11/17/2022] Open
Abstract
Open spina bifida or myelomeningocele (MMC) is a devastating neurologic congenital defect characterized by primary failure of neural tube closure of the spinal column during the embryologic period. Cerebrospinal fluid leak caused by the MMC spinal defect in the developing fetus can result in a constellation of encephalic anomalies that include hindbrain herniation and hydrocephalus. The exposure of extruded spinal cord to amniotic fluid also poses a significant risk for inducing partial or complete paralysis of the body parts beneath the spinal aperture by progressive spinal cord damage in-utero. A randomized trial demonstrated that prenatal repair by fetal surgery, sometimes using patches, to cover the exposed spinal cord with a watertight barrier is effective in reducing the postnatal neurologic morbidity as evidenced by decreased incidence and severity of postnatal hydrocephalus and the reduced need for ventricular-peritoneal shunting. Currently, the use of inert or collagen-based patches are associated with high costs and inadequate structural properties. Specifically, the inert patches do not degrade after implantation, causing the need for a post-natal removal surgery associated with trauma for the newborn. Our present study is aimed towards in-vitro degradation studies of a newly designed patch, which potentially can serve as a superior alternative to existing patches for MMC repair. This novel patch was fabricated by blending poly(l-lactic acid) and poly(ε-caprolactone). The 16-week degradation study in amniotic fluid was focused on tracking changes in crystallinity and mechanical properties. An additional set of designed patches was exposed to phosphate-buffered saline (PBS), as a time-paired control. Crystallinity studies indicate the progress of hydrolytic degradation of the patch in both media, with a preference to bulk erosion in phosphate buffered saline and surface erosion in amniotic fluid. Mechanical testing results establish that patch integrity is not compromised up to 16 weeks of exposure either to body fluids analog (PBS) or to amniotic fluid.
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Kupczak M, Mielańczyk A, Neugebauer D. PDMAEMA/Polyester Miktopolymers: Synthesis via In-Out Approach, Physicochemical Characterization and Enzymatic Degradation. MATERIALS 2021; 14:ma14051277. [PMID: 33800218 PMCID: PMC7975977 DOI: 10.3390/ma14051277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 02/26/2021] [Accepted: 03/04/2021] [Indexed: 02/02/2023]
Abstract
Synthesis, physicochemical characterization, and the enzymatic degradation of the amphiphilic miktoarm star-shaped polymers is reported herein. First, star-shaped macroinitiators, based on N,N′-dimethylaminoethyl methacrylate (DMAEMA) and glycerol dimethacrylate (GDMA) ((PDMAEMA)n-PGDMA), were synthesized. Due to the presence of hydroxyl groups in the macroinitiator core, polyesters such as poly(ɛ-caprolactone) (P(ɛ-CL)), polylactide (PLA) and poly(lactide-co-glycolide) (PLGA) were synthesized using ring opening polymerization (ROP). Comprehensive degradation studies on enzymatic degradation, using a lipase from Pseudomonas cepacia, were performed. Enzymatic degradation was monitored by weight measurements and nuclear magnetic resonance spectroscopy (1H NMR). The fastest degradation rate was observed for the polymer with the lowest molecular weight. Amphiphilic miktopolymers may find application as biomaterials for long- or mid-term period drug-delivery systems.
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Field J, Haycock JW, Boissonade FM, Claeyssens F. A Tuneable, Photocurable, Poly(Caprolactone)-Based Resin for Tissue Engineering-Synthesis, Characterisation and Use in Stereolithography. Molecules 2021; 26:1199. [PMID: 33668087 PMCID: PMC7956195 DOI: 10.3390/molecules26051199] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 02/21/2021] [Accepted: 02/22/2021] [Indexed: 11/16/2022] Open
Abstract
Stereolithography is a useful additive manufacturing technique for the production of scaffolds for tissue engineering. Here we present a tuneable, easy-to-manufacture, photocurable resin for use in stereolithography, based on the widely used biomaterial, poly(caprolactone) (PCL). PCL triol was methacrylated to varying degrees and mixed with photoinitiator to produce a photocurable prepolymer resin, which cured under UV light to produce a cytocompatible material. This study demonstrates that poly(caprolactone) methacrylate (PCLMA) can be produced with a range of mechanical properties and degradation rates. By increasing the degree of methacrylation (DM) of the prepolymer, the Young's modulus of the crosslinked PCLMA could be varied from 0.12-3.51 MPa. The accelerated degradation rate was also reduced from complete degradation in 17 days to non-significant degradation in 21 days. The additive manufacturing capabilities of the resin were demonstrated by the production of a variety of different 3D structures using micro-stereolithography. Here, β-carotene was used as a novel, cytocompatible photoabsorber and enabled the production of complex geometries by giving control over cure depth. The PCLMA presented here offers an attractive, tuneable biomaterial for the production of tissue engineering scaffolds for a wide range of applications.
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Affiliation(s)
- Jonathan Field
- The School of Clinical Dentistry, The University of Sheffield, Sheffield S10 2TA, UK; (J.F.); (F.M.B.)
| | - John W. Haycock
- The Department of Materials Science and Engineering, The University of Sheffield, Sheffield S3 7HQ, UK;
- The Neuroscience Institute, The University of Sheffield, Sheffield S10 2HQ, UK
| | - Fiona M. Boissonade
- The School of Clinical Dentistry, The University of Sheffield, Sheffield S10 2TA, UK; (J.F.); (F.M.B.)
- The Neuroscience Institute, The University of Sheffield, Sheffield S10 2HQ, UK
| | - Frederik Claeyssens
- The Department of Materials Science and Engineering, The University of Sheffield, Sheffield S3 7HQ, UK;
- The Neuroscience Institute, The University of Sheffield, Sheffield S10 2HQ, UK
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Dikici S, Claeyssens F, MacNeil S. Pre-Seeding of Simple Electrospun Scaffolds with a Combination of Endothelial Cells and Fibroblasts Strongly Promotes Angiogenesis. Tissue Eng Regen Med 2020; 17:445-458. [PMID: 32447555 PMCID: PMC7392995 DOI: 10.1007/s13770-020-00263-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 03/14/2020] [Accepted: 04/08/2020] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Introduction of pro-angiogenic cells into tissue-engineered (TE) constructs (prevascularisation) is a promising approach to overcome delayed neovascularisation of such constructs post-implantation. Accordingly, in this study, we examined the contribution of human dermal microvascular endothelial cells (HDMECs) and human dermal fibroblasts (HDFs) alone and in combination on the formation of new blood vessels in ex-ovo chick chorioallantoic membrane (CAM) assay. METHODS Poly-3-hydroxybutyrate-co-3-hydroxyvalerate (PHBV) and polycaprolactone (PCL) were first examined in terms of their physical, mechanical, and biological performances. The effect of gelatin coating and co-culture conditions on enhancing endothelial cell viability and growth was then investigated. Finally, the angiogenic potential of HDMECs and HDFs were assessed macroscopically and histologically after seeding on simple electrospun PHBV scaffolds either in isolation or in indirect co-culture using an ex-ovo CAM assay. RESULTS The results demonstrated that PHBV was slightly more favourable than PCL for HDMECs in terms of cell metabolic activity. The gelatin coating of PHBV scaffolds and co-culture of HDMECs with HDFs both showed a positive impact on HDMECs viability and growth. Both cell types induced angiogenesis over 7 days in the CAM assay either in isolation or in co-culture. The introduction of HDMECs to the scaffolds resulted in the production of more blood vessels in the area of implantation than the introduction of HDFs, but the co-culture of HDMECs and HDFs gave the most significant angiogenic activity. CONCLUSION Our findings showed that the in vitro prevascularisation of TE constructs with HDMECs and HDFs alone or in co-culture promotes angiogenesis in implantable TE constructs.
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Affiliation(s)
- Serkan Dikici
- Tissue Engineering Group, Department of Materials Science and Engineering, Kroto Research Institute, University of Sheffield, North Campus Broad Lane, Sheffield, S3 7HQ, UK
| | - Frederik Claeyssens
- Tissue Engineering Group, Department of Materials Science and Engineering, Kroto Research Institute, University of Sheffield, North Campus Broad Lane, Sheffield, S3 7HQ, UK
| | - Sheila MacNeil
- Tissue Engineering Group, Department of Materials Science and Engineering, Kroto Research Institute, University of Sheffield, North Campus Broad Lane, Sheffield, S3 7HQ, UK.
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Ge L, Chen S. Recent Advances in Tissue Adhesives for Clinical Medicine. Polymers (Basel) 2020; 12:polym12040939. [PMID: 32325657 PMCID: PMC7240468 DOI: 10.3390/polym12040939] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 04/11/2020] [Accepted: 04/13/2020] [Indexed: 12/22/2022] Open
Abstract
Tissue adhesives have attracted more attention to the applications of non-invasive wound closure. The purpose of this review article is to summarize the recent progress of developing tissue adhesives, which may inspire researchers to develop more outstanding tissue adhesives. It begins with a brief introduction to the emerging potential use of tissue adhesives in the clinic. Next, several critical mechanisms for adhesion are discussed, including van der Waals forces, capillary forces, hydrogen bonding, static electric forces, and chemical bonds. This article further details the measurement methods of adhesion and highlights the different types of adhesive, including natural or biological, synthetic and semisynthetic, and biomimetic adhesives. Finally, this review article concludes with remarks on the challenges and future directions for design, fabrication, and application of tissue adhesives in the clinic. This review article has promising potential to provide novel creative design principles for the generation of future tissue adhesives.
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Affiliation(s)
- Liangpeng Ge
- Chongqing Academy of Animal Sciences and Key Laboratory of Pig Industry Sciences, Ministry of Agriculture, Chongqing 402460, China
- Correspondence: (L.G.); (S.C.)
| | - Shixuan Chen
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE 68105, USA
- Correspondence: (L.G.); (S.C.)
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12
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Teoh SH, Goh BT, Lim J. Three-Dimensional Printed Polycaprolactone Scaffolds for Bone Regeneration Success and Future Perspective. Tissue Eng Part A 2020; 25:931-935. [PMID: 31084409 DOI: 10.1089/ten.tea.2019.0102] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
IMPACT STATEMENT Cells need a home to proliferate and remodel; biomimicry of the microarchitecture and microenvironment is important, and with 10 years of history in more than 20,000 clinical applications of 3D printed medical grade polycaprolactone scaffolds, we present the lessons learnt and project the future.
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Affiliation(s)
- Swee-Hin Teoh
- 1Centre for Developmental Biology, Tissue Engineering, Regenerative Medicine and Innovation, School of Chemical and Biomedical Engineering and Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Singapore
| | - Bee-Tin Goh
- 2National Dental Centre Singapore, Singapore
| | - Jing Lim
- 3Osteopore International Pte Ltd., Singapore
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Reifenrath J, Wellmann M, Kempfert M, Angrisani N, Welke B, Gniesmer S, Kampmann A, Menzel H, Willbold E. TGF-β3 Loaded Electrospun Polycaprolacton Fibre Scaffolds for Rotator Cuff Tear Repair: An in Vivo Study in Rats. Int J Mol Sci 2020; 21:E1046. [PMID: 32033294 PMCID: PMC7036781 DOI: 10.3390/ijms21031046] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/27/2020] [Accepted: 02/04/2020] [Indexed: 12/21/2022] Open
Abstract
Biological factors such as TGF-β3 are possible supporters of the healing process in chronic rotator cuff tears. In the present study, electrospun chitosan coated polycaprolacton (CS-g-PCL) fibre scaffolds were loaded with TGF-β3 and their effect on tendon healing was compared biomechanically and histologically to unloaded fibre scaffolds in a chronic tendon defect rat model. The biomechanical analysis revealed that tendon-bone constructs with unloaded scaffolds had significantly lower values for maximum force compared to native tendons. Tendon-bone constructs with TGF-β3-loaded fibre scaffolds showed only slightly lower values. In histological evaluation minor differences could be observed. Both groups showed advanced fibre scaffold degradation driven partly by foreign body giant cell accumulation and high cellular numbers in the reconstructed area. Normal levels of neutrophils indicate that present mast cells mediated rather phagocytosis than inflammation. Fibrosis as sign of foreign body encapsulation and scar formation was only minorly present. In conclusion, TGF-β3-loading of electrospun PCL fibre scaffolds resulted in more robust constructs without causing significant advantages on a cellular level. A deeper investigation with special focus on macrophages and foreign body giant cells interactions is one of the major foci in further investigations.
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Affiliation(s)
- Janin Reifenrath
- Department of Orthopaedic Surgery, Hannover Medical School, Anna–von–Borries Str. 1–3, 30625 Hannover, Germany
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), Hannover Medical School, Stadtfelddamm 34, 30625 Hannover, Germany
| | - Mathias Wellmann
- Department of Orthopaedic Surgery, Hannover Medical School, Anna–von–Borries Str. 1–3, 30625 Hannover, Germany
| | - Merle Kempfert
- Department of Orthopaedic Surgery, Hannover Medical School, Anna–von–Borries Str. 1–3, 30625 Hannover, Germany
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), Hannover Medical School, Stadtfelddamm 34, 30625 Hannover, Germany
| | - Nina Angrisani
- Department of Orthopaedic Surgery, Hannover Medical School, Anna–von–Borries Str. 1–3, 30625 Hannover, Germany
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), Hannover Medical School, Stadtfelddamm 34, 30625 Hannover, Germany
| | - Bastian Welke
- Laboratory for Biomechanics and Biomaterials, Department of Orthopaedic Surgery, Hannover Medical School, Haubergstraße 3, 30625 Hannover, Germany
| | - Sarah Gniesmer
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), Hannover Medical School, Stadtfelddamm 34, 30625 Hannover, Germany
- Clinic for Cranio–Maxillo–Facial Surgery, Hannover Medical School, Carl–Neuberg–Straße 1, 30625 Hannover, Germany
| | - Andreas Kampmann
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), Hannover Medical School, Stadtfelddamm 34, 30625 Hannover, Germany
- Clinic for Cranio–Maxillo–Facial Surgery, Hannover Medical School, Carl–Neuberg–Straße 1, 30625 Hannover, Germany
| | - Henning Menzel
- Institute for Technical Chemistry, Braunschweig University of Technology, Hagenring 30, 38106 Braunschweig, Germany
| | - Elmar Willbold
- Department of Orthopaedic Surgery, Hannover Medical School, Anna–von–Borries Str. 1–3, 30625 Hannover, Germany
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), Hannover Medical School, Stadtfelddamm 34, 30625 Hannover, Germany
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Willbold E, Wellmann M, Welke B, Angrisani N, Gniesmer S, Kampmann A, Hoffmann A, Cassan D, Menzel H, Hoheisel AL, Glasmacher B, Reifenrath J. Possibilities and limitations of electrospun chitosan‐coated polycaprolactone grafts for rotator cuff tear repair. J Tissue Eng Regen Med 2019; 14:186-197. [DOI: 10.1002/term.2985] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 09/27/2019] [Accepted: 10/17/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Elmar Willbold
- Laboratory for Biomechanics and Biomaterials, Department of Orthopaedic SurgeryHannover Medical School Hannover Germany
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE)Hannover Medical School Hannover Germany
| | - Mathias Wellmann
- Laboratory for Biomechanics and Biomaterials, Department of Orthopaedic SurgeryHannover Medical School Hannover Germany
| | - Bastian Welke
- Laboratory for Biomechanics and Biomaterials, Department of Orthopaedic SurgeryHannover Medical School Hannover Germany
| | - Nina Angrisani
- Laboratory for Biomechanics and Biomaterials, Department of Orthopaedic SurgeryHannover Medical School Hannover Germany
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE)Hannover Medical School Hannover Germany
| | - Sarah Gniesmer
- Clinic for Cranio‐Maxillo‐Facial SurgeryHannover Medical School Hannover Germany
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE)Hannover Medical School Hannover Germany
| | - Andreas Kampmann
- Clinic for Cranio‐Maxillo‐Facial SurgeryHannover Medical School Hannover Germany
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE)Hannover Medical School Hannover Germany
| | - Andrea Hoffmann
- Laboratory for Biomechanics and Biomaterials, Department of Orthopaedic SurgeryHannover Medical School Hannover Germany
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE)Hannover Medical School Hannover Germany
| | - Dominik Cassan
- Institute for Technical ChemistryBraunschweig University of Technology Braunschweig Germany
| | - Henning Menzel
- Institute for Technical ChemistryBraunschweig University of Technology Braunschweig Germany
| | - Anna Lena Hoheisel
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE)Hannover Medical School Hannover Germany
- Institute for Multiphase ProcessesLeibniz University Hannover Hannover Germany
| | - Birgit Glasmacher
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE)Hannover Medical School Hannover Germany
- Institute for Multiphase ProcessesLeibniz University Hannover Hannover Germany
| | - Janin Reifenrath
- Laboratory for Biomechanics and Biomaterials, Department of Orthopaedic SurgeryHannover Medical School Hannover Germany
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE)Hannover Medical School Hannover Germany
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15
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Adhikari U, An X, Rijal N, Hopkins T, Khanal S, Chavez T, Tatu R, Sankar J, Little KJ, Hom DB, Bhattarai N, Pixley SK. Embedding magnesium metallic particles in polycaprolactone nanofiber mesh improves applicability for biomedical applications. Acta Biomater 2019; 98:215-234. [PMID: 31059833 DOI: 10.1016/j.actbio.2019.04.061] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 04/28/2019] [Accepted: 04/30/2019] [Indexed: 12/19/2022]
Abstract
Magnesium (Mg) metal is of great interest in biomedical applications, especially in tissue engineering. Mg exhibits excellent in vivo biocompatibility, biodegradability and, during degradation, releases Mg ions (Mg2+) with the potential to improve tissue repair. We used electrospinning technology to incorporate Mg particles into nanofibers. Various ratios of Mg metal microparticles (<44 µm diameter) were incorporated into nanofiber polycaprolactone (PCL) meshes. Physicochemical properties of the meshes were analyzed by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), mechanical tensile testing, X-ray diffractometry and UV-VIS spectrophotometry. Biological properties of meshes were evaluated in vitro and in vivo. Under mammalian cell culture conditions, Mg-containing meshes released hydrogen gas and relative amounts of free Mg2+ that reflected the Mg/PCL ratios. All meshes were non-cytotoxic for 3T3 fibroblasts and PC-12 pheochromocytoma cells. In vivo implantation under the skin of mice for 3, 8 and 28 days showed that Mg-containing meshes were well vascularized, with improved measures of inflammation and healing compared to meshes without Mg. Evidence included an earlier appearance and infiltration of tissue repairing macrophages and, after 28 days, evidence of more mature tissue remodeling. Thus, these new composite nanofiber meshes have promising material properties that mitigated inflammatory tissue responses to PCL alone and improved tissue healing, thus providing a suitable matrix for use in clinically relevant tissue engineering applications. STATEMENT OF SIGNIFICANCE: The biodegradable metal, magnesium, safely biodegrades in the body, releasing beneficial byproducts. To improve tissue delivery, magnesium metal particles were incorporated into electrospun nanofiber meshes composed of a biodegradable, biocompatible polymer, polycaprolactone (PCL). Magnesium addition, at several concentrations, did not alter PCL chemistry, but did alter physical properties. Under cell culture conditions, meshes released magnesium ions and hydrogen gas and were not cytotoxic for two cell types. After implantation in mice, the mesh with magnesium resulted in earlier appearance of M2-like, reparative macrophages and improved tissue healing versus mesh alone. This is in agreement with other studies showing beneficial effects of magnesium metal and provides a new type of scaffold material that will be useful in clinically relevant tissue engineering applications.
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Park SY, Kim SY, Kim T, Ahn H, Chung I. Syntheses of biodegradable polymer networks based on polycaprolactone and glutamic acid. POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4520] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Soo Yong Park
- Department of Polymer Science and Engineering; Pusan National University; Busan South Korea
| | - Soo-Yeon Kim
- Department of Polymer Science and Engineering; Pusan National University; Busan South Korea
| | - Taeyoon Kim
- Department of Polymer Science and Engineering; Pusan National University; Busan South Korea
| | - Heejoon Ahn
- Department of Organic and Nano Engineering; Hanyang University; Seoul South Korea
| | - Ildoo Chung
- Department of Polymer Science and Engineering; Pusan National University; Busan South Korea
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17
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Tatu R, Oria M, Pulliam S, Signey L, Rao MB, Peiro JL, Lin CY. Using poly(l-lactic acid) and poly(ɛ-caprolactone) blends to fabricate self-expanding, watertight and biodegradable surgical patches for potential fetoscopic myelomeningocele repair. J Biomed Mater Res B Appl Biomater 2018; 107:295-305. [PMID: 29770571 DOI: 10.1002/jbm.b.34121] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 02/04/2018] [Accepted: 03/14/2018] [Indexed: 01/01/2023]
Abstract
Our study focuses on the development and characterization of a self-expanding, watertight and biodegradable patch for fetoscopic myelomeningocele (MMC) prenatal repair. We fabricated poly(l-lactic acid) (PLA) and poly(ɛ-caprolactone) (PCL) blend films by solution casting. Formulation c with average glass transition temperature of 37.6 ± 1.2°C was chosen for temporospatial recovery. Favorable results from surface studies reflected homogeneous dispersion of polymers in the blend. The cytotoxicity was studied in human foreskin fibroblasts. The blend film was cytocompatible, evidenced by matching percentage of live cells in exposed and control solutions. Subsequently, liquid water permeability experiments confirmed watertight nature of films. Finally, in vitro degradation was investigated in phosphate buffered saline (PBS) and amniotic fluid (AF) separately for 16 weeks. Similar weight loss (n = 6, p = 0.912) and significantly different (n = 3, p = 0.025) surface roughness was observed in PBS and AF, respectively, at 16 weeks. Functional group analysis displayed increasing carbonyl and hydroxyl bonds in PBS and AF, respectively, over time, indicating progression of hydrolytic degradation. Favorable characterization results provide strong evidence to employ PLA-PCL blend films as surgical patches in fetoscopic MMC repair. Designed patch serves as standalone system to successfully tackle impending hurdles of MMC repair and proves to be a superior alternative compared to existing patches. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 107B: 295-305, 2019.
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Affiliation(s)
- Rigwed Tatu
- Structural Tissue Evaluation and Engineering Laboratory, Department of Biomedical Engineering, University of Cincinnati, Cincinnati, Ohio, 45221
| | - Marc Oria
- Pediatric General and Thoracic Surgery Division, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, 45229
| | - Sarah Pulliam
- Structural Tissue Evaluation and Engineering Laboratory, Department of Biomedical Engineering, University of Cincinnati, Cincinnati, Ohio, 45221
| | - Lorenzo Signey
- Structural Tissue Evaluation and Engineering Laboratory, Department of Biomedical Engineering, University of Cincinnati, Cincinnati, Ohio, 45221
| | - Marepalli B Rao
- Department of Environmental Health, Department of Biomedical Engineering, University of Cincinnati, Cincinnati, Ohio, 45267
| | - Jose L Peiro
- Pediatric General and Thoracic Surgery Division, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, 45229
| | - Chia-Ying Lin
- Structural Tissue Evaluation and Engineering Laboratory, Department of Biomedical Engineering, University of Cincinnati, Cincinnati, Ohio, 45221.,Department of Orthopedic Surgery, University of Cincinnati, Cincinnati, Ohio, 45221.,Department of Neurosurgery, University of Cincinnati, Cincinnati, Ohio, 45221
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Attachment of nanoparticulate drug-release systems on poly(ε-caprolactone) nanofibers via a graftpolymer as interlayer. Colloids Surf B Biointerfaces 2018; 163:309-320. [DOI: 10.1016/j.colsurfb.2017.12.050] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Revised: 12/20/2017] [Accepted: 12/27/2017] [Indexed: 12/22/2022]
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20
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Biocompatibility of hydrogel-based scaffolds for tissue engineering applications. Biotechnol Adv 2017; 35:530-544. [DOI: 10.1016/j.biotechadv.2017.05.006] [Citation(s) in RCA: 407] [Impact Index Per Article: 58.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Revised: 05/08/2017] [Accepted: 05/22/2017] [Indexed: 12/15/2022]
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21
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Schantz JT, Hutmacher DW, Chim H, Ng KW, Lim TC, Teoh SH. Induction of Ectopic Bone Formation by Using Human Periosteal Cells in Combination with a Novel Scaffold Technology. Cell Transplant 2017. [DOI: 10.3727/096020198389852] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Due to their osteogenic germination potential, periosteum-derived osteoprogenitor cells are a potential source for tissue engineering a bone graft that could be used to regenerate skeletal defects. In this study we evaluated if ectopic bone formation could be induced by a construct made of human periosteal cells and a novel scaffold architecture whose mechanical properties are in the range of cancellous bone. Biopsies from human calvarial periosteum were harvested and cells were isolated from the inner cambial layer. Fifty thousand periosteal cells were seeded into the scaffolds measuring 6 × 6 × 2 mm. The cell–scaffold constructs were cultured for a period of 3 weeks prior to implantation into balb C nude mice. Mice were sacrificed and implants were analyzed 6 and 17 weeks postoperatively. Immunohistochemical analysis confirmed the osteoblastic phenotype of the seeded cells. Formation of focal adhesions and stress fibers could be observed in both scaffold architectures. Three-dimensional cell proliferation was observed after 2 weeks of culturing with centripetal growth pattern inside the pore network. The deposition of calcified extracellular matrix was observed after 3 weeks of culturing. In vivo, endochondral bone formation with osteoid production was detectable via von Kossa and Osteocalcin staining after 6 and 17 weeks. Histology and SEM revealed that the entire scaffold/bone grafts were penetrated by a vascular network. This study showed the potential of bone tissue engineering by using human periosteal cells in combination with a novel scaffold technology.
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Affiliation(s)
- Jan-Thorsten Schantz
- Laboratory for Biomedical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260
- #Department of Plastic Surgery, National University Hospital, 5 Lower Kent Ridge Road, Singapore 119074
| | - Dietmar Werner Hutmacher
- Department of Bioengineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260
- Department of Orthopaedic Surgery, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260
| | - Harvey Chim
- Faculty of Medicine, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260
| | - Kee Woei Ng
- Laboratory for Biomedical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260
- Department of Mechanical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260
| | - Thiam Chye Lim
- #Department of Plastic Surgery, National University Hospital, 5 Lower Kent Ridge Road, Singapore 119074
| | - Swee Hin Teoh
- Laboratory for Biomedical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260
- Department of Mechanical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260
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22
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Wang K, Strandman S, Zhu XX. A mini review: Shape memory polymers for biomedical applications. Front Chem Sci Eng 2017. [DOI: 10.1007/s11705-017-1632-4] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Youssef A, Hollister SJ, Dalton PD. Additive manufacturing of polymer melts for implantable medical devices and scaffolds. Biofabrication 2017; 9:012002. [DOI: 10.1088/1758-5090/aa5766] [Citation(s) in RCA: 126] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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24
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Cerkez I, Sezer A, Bhullar SK. Fabrication and characterization of electrospun poly(e-caprolactone) fibrous membrane with antibacterial functionality. ROYAL SOCIETY OPEN SCIENCE 2017; 4:160911. [PMID: 28386444 PMCID: PMC5367279 DOI: 10.1098/rsos.160911] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 01/05/2017] [Indexed: 05/18/2023]
Abstract
This research study is mainly targeted on fabrication and characterization of antibacterial poly(e-caprolactone) (PCL) based fibrous membrane containing silver chloride particles. Micro/nano fibres were produced by electrospinning and characterized with TGA, DSC, SEM and mechanical analysis. It was found that addition of silver particles slightly reduced onset of thermal degradation and increased crystallization temperature of neat PCL. Silver-loaded samples exhibited higher tensile stress and lower strain revealing that the particles behaved as reinforcing agent. Moreover, addition of silver chloride resulted in beaded surface texture and formation of finer fibres as opposed to the neat. Antibacterial properties were tested against Gram-negative and Gram-positive bacteria and remarkable biocidal functionalities were obtained with about six logs reduction of Staphylococcus aureus and Escherichia coli O157:H7.
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Affiliation(s)
- Idris Cerkez
- Department of Fiber and Polymer Engineering, Bursa Technical University, Bursa, 16190, Turkey
| | - Ayse Sezer
- Department of Fiber and Polymer Engineering, Bursa Technical University, Bursa, 16190, Turkey
| | - Sukhwinder K. Bhullar
- Department of Mechanical Engineering, Bursa Technical University, Bursa, 16190, Turkey
- Author for correspondence: Sukhwinder K. Bhullar e-mail: ;
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25
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Costa JB, Oliveira JM, Reis RL. Biomaterials in Meniscus Tissue Engineering. REGENERATIVE STRATEGIES FOR THE TREATMENT OF KNEE JOINT DISABILITIES 2017. [DOI: 10.1007/978-3-319-44785-8_13] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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26
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Peña JA, Gutiérrez SJ, Villamil JC, Agudelo NA, Pérez LD. Policaprolactone/polyvinylpyrrolidone/siloxane hybrid materials: Synthesis and in vitro delivery of diclofenac and biocompatibility with periodontal ligament fibroblasts. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 58:60-9. [PMID: 26478287 DOI: 10.1016/j.msec.2015.08.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 07/10/2015] [Accepted: 08/07/2015] [Indexed: 12/01/2022]
Abstract
In this paper, we report the synthesis of polycaprolactone (PCL) based hybrid materials containing hydrophilic domains composed of N-vinylpyrrolidone (VP), and γ-methacryloxypropyltrimethoxysilane (MPS). The hybrid materials were obtained by RAFT copolymerization of N-vinylpyrrolidone and MPS using a pre-formed dixanthate-end-functionalized PCL as macro-chain transfer agent, followed by a post-reaction crosslinking step. The composition of the samples was determined by elemental and thermogravimetric analyses. Differential scanning calorimetry and X-ray diffraction indicated that the crystallinity of PCL decreases in the presence of the hydrophilic domains. Scanning electron microscopy images revealed that the samples present an interconnected porous structure on the swelling. Compared to PCL, the hybrid materials presented low water contact angle values and higher elastic modulus. These materials showed controlled release of diclofenac, and biocompatibility with human periodontal ligament fibroblasts.
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Affiliation(s)
- José A Peña
- Departamento de Química, Pontificia Universidad Javeriana, Bogotá D.C., Colombia
| | - Sandra J Gutiérrez
- Centro de investigaciones Odontológicas, Facultad de Odontología, Pontificia Universidad Javeriana, Bogotá, Colombia.
| | - Jean C Villamil
- Centro de investigaciones Odontológicas, Facultad de Odontología, Pontificia Universidad Javeriana, Bogotá, Colombia
| | | | - León D Pérez
- Grupo de Macromoléculas, Departamento de Química, Universidad Nacional de Colombia, Carrera 45 No 26-85, edificio 451 of. 449, Bogotá D.C. Colombia.
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27
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Lee DJ. Intraocular Implants for the Treatment of Autoimmune Uveitis. J Funct Biomater 2015; 6:650-66. [PMID: 26264035 PMCID: PMC4598676 DOI: 10.3390/jfb6030650] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 07/21/2015] [Accepted: 07/27/2015] [Indexed: 12/15/2022] Open
Abstract
Uveitis is the third leading cause of blindness in developed countries. Currently, the most widely used treatment of non-infectious uveitis is corticosteroids. Posterior uveitis and macular edema can be treated with intraocular injection of corticosteroids, however, this is problematic in chronic cases because of the need for repeat injections. Another option is systemic immunosuppressive therapies that have their own undesirable side effects. These systemic therapies result in a widespread suppression of the entire immune system, leaving the patient susceptible to infection. Therefore, an effective localized treatment option is preferred. With the recent advances in bioengineering, biodegradable polymers that allow for a slow sustained-release of a medication. These advances have culminated in drug delivery implants that are food and drug administration (FDA) approved for the treatment of non-infectious uveitis. In this review, we discuss the types of ocular implants available and some of the polymers used, implants used for the treatment of non-infectious uveitis, and bioengineered alternatives that are on the horizon.
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Affiliation(s)
- Darren J Lee
- Department of Ophthalmology/Dean McGee Eye Institute, University of Oklahoma Health Sciences Center, 608 Stanton L. Young Blvd, DMEI PA404, Oklahoma City, OK 73104, USA.
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28
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Ke D, Dernell W, Bandyopadhyay A, Bose S. Doped tricalcium phosphate scaffolds by thermal decomposition of naphthalene: Mechanical properties and in vivo osteogenesis in a rabbit femur model. J Biomed Mater Res B Appl Biomater 2014; 103:1549-59. [PMID: 25504889 DOI: 10.1002/jbm.b.33321] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Revised: 09/25/2014] [Accepted: 10/18/2014] [Indexed: 01/17/2023]
Abstract
Tricalcium phosphate (TCP) is a bioceramic that is widely used in orthopedic and dental applications. TCP structures show excellent biocompatibility as well as biodegradability. In this study, porous β-TCP scaffolds were prepared by thermal decomposition of naphthalene. Scaffolds with 57.64% ± 3.54% density and a maximum pore size around 100 μm were fabricated via removing 30% naphthalene at 1150°C. The compressive strength for these scaffolds was 32.85 ± 1.41 MPa. Furthermore, by mixing 1 wt % SrO and 0.5 wt % SiO2 , pore interconnectivity improved, but the compressive strength decreased to 22.40 ± 2.70 MPa. However, after addition of polycaprolactone coating layers, the compressive strength of doped scaffolds increased to 29.57 ± 3.77 MPa. Porous scaffolds were implanted in rabbit femur defects to evaluate their biological property. The addition of dopants triggered osteoinduction by enhancing osteoid formation, osteocalcin expression, and bone regeneration, especially at the interface of the scaffold and host bone. This study showed processing flexibility to make interconnected porous scaffolds with different pore size and volume fraction porosity, while maintaining high compressive mechanical strength and excellent bioactivity. Results show that SrO/SiO2 -doped porous TCP scaffolds have excellent potential to be used in bone tissue engineering applications.
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Affiliation(s)
- Dongxu Ke
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington, 99164-2920
| | - William Dernell
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington, 99164-2920
| | - Amit Bandyopadhyay
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington, 99164-2920
| | - Susmita Bose
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington, 99164-2920
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29
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Idaszek J, Bruinink A, Święszkowski W. Ternary composite scaffolds with tailorable degradation rate and highly improved colonization by human bone marrow stromal cells. J Biomed Mater Res A 2014; 103:2394-404. [DOI: 10.1002/jbm.a.35377] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 11/06/2014] [Accepted: 11/19/2014] [Indexed: 11/10/2022]
Affiliation(s)
- J. Idaszek
- Faculty of Materials Science and Engineering; Warsaw University of Technology; 02-507 Warsaw Poland
| | - A. Bruinink
- Materials Meet Life, Materials-Biology Interactions Laboratory, EMPA, Swiss Federal Laboratories for Materials Science and Technology; Lerchenfeldstrasse 5, 9014 St. Gallen Switzerland
| | - W. Święszkowski
- Faculty of Materials Science and Engineering; Warsaw University of Technology; 02-507 Warsaw Poland
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30
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Brännmark C, Paul A, Ribeiro D, Magnusson B, Brolén G, Enejder A, Forslöw A. Increased adipogenesis of human adipose-derived stem cells on polycaprolactone fiber matrices. PLoS One 2014; 9:e113620. [PMID: 25419971 PMCID: PMC4242727 DOI: 10.1371/journal.pone.0113620] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Accepted: 10/27/2014] [Indexed: 11/18/2022] Open
Abstract
With accelerating rates of obesity and type 2 diabetes world-wide, interest in studying the adipocyte and adipose tissue is increasing. Human adipose derived stem cells--differentiated to adipocytes in vitro--are frequently used as a model system for white adipocytes, as most of their pathways and functions resemble mature adipocytes in vivo. However, these cells are not completely like in vivo mature adipocytes. Hosting the cells in a more physiologically relevant environment compared to conventional two-dimensional cell culturing on plastic surfaces, can produce spatial cues that drive the cells towards a more mature state. We investigated the adipogenesis of adipose derived stem cells on electro spun polycaprolactone matrices and compared functionality to conventional two-dimensional cultures as well as to human primary mature adipocytes. To assess the degree of adipogenesis we measured cellular glucose-uptake and lipolysis and used a range of different methods to evaluate lipid accumulation. We compared the averaged results from a whole population with the single cell characteristics--studied by coherent anti-Stokes Raman scattering microscopy--to gain a comprehensive picture of the cell phenotypes. In adipose derived stem cells differentiated on a polycaprolactone-fiber matrix; an increased sensitivity in insulin-stimulated glucose uptake was detected when cells were grown on either aligned or random matrices. Furthermore, comparing differentiation of adipose derived stem cells on aligned polycaprolactone-fiber matrixes, to those differentiated in two-dimensional cultures showed, an increase in the cellular lipid accumulation, and hormone sensitive lipase content. In conclusion, we propose an adipocyte cell model created by differentiation of adipose derived stem cells on aligned polycaprolactone-fiber matrices which demonstrates increased maturity, compared to 2D cultured cells.
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Affiliation(s)
- Cecilia Brännmark
- Reagent and Assay Development Discovery Sciences R&D, Astra Zeneca, Mölndal, Sweden
| | - Alexandra Paul
- Molecular Microscopy Department of Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Diana Ribeiro
- Reagent and Assay Development Discovery Sciences R&D, Astra Zeneca, Mölndal, Sweden
- Molecular Microscopy Department of Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Björn Magnusson
- Reagent and Assay Development Discovery Sciences R&D, Astra Zeneca, Mölndal, Sweden
| | - Gabriella Brolén
- Reagent and Assay Development Discovery Sciences R&D, Astra Zeneca, Mölndal, Sweden
| | - Annika Enejder
- Molecular Microscopy Department of Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Anna Forslöw
- Reagent and Assay Development Discovery Sciences R&D, Astra Zeneca, Mölndal, Sweden
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31
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Surface hierarchical porosity in poly (ɛ-caprolactone) membranes with potential applications in tissue engineering prepared by foaming in supercritical carbon dioxide. J Supercrit Fluids 2014. [DOI: 10.1016/j.supflu.2014.09.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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32
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Goh BT, Teh LY, Tan DBP, Zhang Z, Teoh SH. Novel 3D polycaprolactone scaffold for ridge preservation - a pilot randomised controlled clinical trial. Clin Oral Implants Res 2014; 26:271-7. [DOI: 10.1111/clr.12486] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/04/2014] [Indexed: 11/28/2022]
Affiliation(s)
- Bee Tin Goh
- National Dental Centre of Singapore; Singapore Singapore
| | - Luan Yook Teh
- National Dental Centre of Singapore; Singapore Singapore
| | | | | | - Swee Hin Teoh
- Nanyang, Technological University; Singapore Singapore
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Osathanon T, Chuenjitkuntaworn B, Nowwarote N, Supaphol P, Sastravaha P, Subbalekha K, Pavasant P. The responses of human adipose-derived mesenchymal stem cells on polycaprolactone-based scaffolds: an in vitro study. Tissue Eng Regen Med 2014. [DOI: 10.1007/s13770-014-0015-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
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De A, Mishra S, Mozumdar S. Stimuli‐Responsive Smart Nanoparticles for Biomedical Application. Adv Healthc Mater 2014. [DOI: 10.1002/9781118774205.ch1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Rongen JJ, van Tienen TG, van Bochove B, Grijpma DW, Buma P. Biomaterials in search of a meniscus substitute. Biomaterials 2014; 35:3527-40. [DOI: 10.1016/j.biomaterials.2014.01.017] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 01/08/2014] [Indexed: 11/24/2022]
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Trujillo NA, Popat KC. Increased Adipogenic and Decreased Chondrogenic Differentiation of Adipose Derived Stem Cells on Nanowire Surfaces. MATERIALS 2014; 7:2605-2630. [PMID: 28788586 PMCID: PMC5453350 DOI: 10.3390/ma7042605] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 03/18/2014] [Accepted: 03/20/2014] [Indexed: 12/14/2022]
Abstract
Despite many advances in tissue engineering, there are still significant challenges associated with restructuring, repairing, or replacing damaged tissue in the body. Currently, a major obstacle has been trying to develop a scaffold for cartilage tissue engineering that provides the correct mechanical properties to endure the loads associated with articular joints as well as promote cell-scaffold interactions to aid in extracellular matrix deposition. In addition, adipogenic tissue engineering is widely growing due to an increased need for more innovative reconstructive therapies following adipose tissue traumas and cosmetic surgeries. Recently, lipoaspirate tissue has been identified as a viable alternative source for mesenchymal stem cells because it contains a supportive stroma that can easily be isolated. Adipose derived stem cells (ADSCs) can differentiate into a variety of mesodermal lineages including the adipogenic and chondrogenic phenotypes. Biodegradable polymeric scaffolds have been shown to be a promising alternative and stem cells have been widely used to evaluate the compatibility, viability, and bioactivity of these materials. Polycaprolactone is a bioresorbable polymer, which has been widely used for biomedical and tissue engineering applications. The fundamental concept behind successful synthetic tissue-engineered scaffolds is to promote progenitor cell migration, adhesion, proliferation, and induce differentiation, extracellular matrix synthesis, and finally integration with host tissue. In this study, we investigated the adhesion, proliferation, and chondrogenic and adipogenic differentiation of ADSCs on nanowire surfaces. A solvent-free gravimetric template technique was used to fabricate polycaprolactone nanowires surfaces. The results indicated that during the growth period i.e., initial 7 days of culture, the nanowire surfaces (NW) supported adhesion and proliferation of the cells that had elongated morphologies. However, cell on surfaces without nanowires had non-elongated morphologies. Further, immunofluorescence imaging of marker proteins showed that the nanowires surfaces did not appear to support chondrogenic differentiation whereas supported adipogenic differentiation of ADSCs.
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Affiliation(s)
- Nathan A Trujillo
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523, USA.
| | - Ketul C Popat
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523, USA.
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Hamlekhan A, Moztarzadeh F, Mozafari M, Azami M, Nezafati N. Preparation of laminated poly(ε-caprolactone)-gelatin-hydroxyapatite nanocomposite scaffold bioengineered via compound techniques for bone substitution. BIOMATTER 2014; 1:91-101. [PMID: 23507731 PMCID: PMC3548252 DOI: 10.4161/biom.1.1.17445] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In this research, new bioactive nanocomposite scaffolds were successfully developed using poly(ε-caprolactone) (PCL), cross-linked gelatin and nanoparticles of hydroxyapatite (HAp) after testing different solvents and methods. First, HAp powder was synthesized via a chemical precipitation technique and characterized. Then, the nanocomposites were prepared through layer solvent casting combined with freeze-drying and lamination techniques. According to the results, the increasing of the PCL weight in the scaffolds led to the improvement of the mechanical properties. The amount of ultimate stress, stiffness and also elastic modulus increased from 8 MPa for 0% wt PCL to 23.5 MPa for 50% wt PCL. The biomineralization study revealed the formation of an apatite layer on the scaffolds after immersion in simulated body fluid (SBF). The Ca-P ratios were in accordance to nonstoichiometric biological apatite, which was approximately 1.67. The in vitro biocompatibility and cytocompatibility of the scaffolds were tested using mesenchymal stem cells (MSCs), and the results indicated no sign of toxicity, and cells were found to be attached to the scaffold walls. The in vivo biocompatibility and osteogenesis of these scaffolds in the animal experiments is also under investigation, and the result will be published at the end of the study.
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Affiliation(s)
- Azhang Hamlekhan
- Biomaterials Group, Faculty of Biomedical Engineering (Center of Excellence), Amirkabir University of Technology, Tehran, Iran
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38
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Benagiano G, Gabelnick H, Farris M. Contraceptive devices: subcutaneous delivery systems. Expert Rev Med Devices 2014; 5:623-37. [DOI: 10.1586/17434440.5.5.623] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Jo S, Kang SM, Park SA, Kim WD, Kwak J, Lee H. Enhanced Adhesion of Preosteoblasts inside 3DPCL Scaffolds by Polydopamine Coating and Mineralization. Macromol Biosci 2013; 13:1389-95. [DOI: 10.1002/mabi.201300203] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Revised: 05/27/2013] [Indexed: 12/22/2022]
Affiliation(s)
- Sunae Jo
- Department of Chemistry; KAIST; Daejeon 305-701 South Korea
| | - Sung Min Kang
- Department of Marine Bio-materials & Aquaculture; Pukyong National University; Busan 608-737 South Korea
| | - Su A. Park
- Nature-Inspired Mechanical System Team, Nano Convergence and Manufacturing Systems Research Division; Korea Institute of Machinery and Materials; Daejeon 305-343 South Korea
| | - Wan Doo Kim
- Nature-Inspired Mechanical System Team, Nano Convergence and Manufacturing Systems Research Division; Korea Institute of Machinery and Materials; Daejeon 305-343 South Korea
| | - Juhyoun Kwak
- Department of Chemistry; KAIST; Daejeon 305-701 South Korea
| | - Haeshin Lee
- Department of Chemistry; KAIST; Daejeon 305-701 South Korea
- Graduate School of Nanoscience & Technology (WCU), KAIST; Daejeon 305-701 South Korea
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Goh BT, Chanchareonsook N, Tideman H, Teoh SH, Chow JKF, Jansen JA. The use of a polycaprolactone-tricalcium phosphate scaffold for bone regeneration of tooth socket facial wall defects and simultaneous immediate dental implant placement inMacaca fascicularis. J Biomed Mater Res A 2013; 102:1379-88. [DOI: 10.1002/jbm.a.34817] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Revised: 05/15/2013] [Accepted: 05/21/2013] [Indexed: 11/05/2022]
Affiliation(s)
- Bee Tin Goh
- Department of Oral & Maxillofacial Surgery; National Dental Centre Singapore; Singapore Singapore
| | | | - Henk Tideman
- Department of Oral & Maxillofacial Surgery; University of Hong Kong; Hong Kong
- Department of Oral & Maxillofacial Surgery; National Dental Centre Singapore; Singapore Singapore
| | - Swee Hin Teoh
- Division of Bioengineering, School of Chemical and Biomedical Engineering; Nanyang Technological University; Singapore Singapore
| | - James Kwok Fai Chow
- Department of Oral & Maxillofacial Surgery; Branemark Osseointegration Centre; Hong Kong
- Department of Oral & Maxillofacial Surgery; Tideman Maxillofacial Centre; Hong Kong
| | - John A. Jansen
- Department of Periodontology and Biomaterials; Radboud University Nijmegen Medical Centre; The Netherlands
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41
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Duarte A, Coelho J, Bordado J, Cidade M, Gil M. Surgical adhesives: Systematic review of the main types and development forecast. Prog Polym Sci 2012. [DOI: 10.1016/j.progpolymsci.2011.12.003] [Citation(s) in RCA: 168] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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42
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Tyrrell ZL, Shen Y, Radosz M. Multilayered Nanoparticles for Controlled Release of Paclitaxel Formed by Near-Critical Micellization of Triblock Copolymers. Macromolecules 2012. [DOI: 10.1021/ma300271k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zachary L. Tyrrell
- Soft Materials Laboratory, Department of Chemical & Petroleum Engineering, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Youqing Shen
- Center for Bionanoengineering
and the State Key Laboratory of Chemical Engineering, Zhejiang University, Hangzhou, China 310027
| | - Maciej Radosz
- Soft Materials Laboratory, Department of Chemical & Petroleum Engineering, University of Wyoming, Laramie, Wyoming 82071, United States
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Loh XJ, Yee BJH, Chia FS. Sustained delivery of paclitaxel using thermogelling poly(PEG/PPG/PCL urethane)s for enhanced toxicity against cancer cells. J Biomed Mater Res A 2012; 100:2686-94. [DOI: 10.1002/jbm.a.34198] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Revised: 02/19/2012] [Accepted: 03/30/2012] [Indexed: 01/31/2023]
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Thomas V, Jose MV, Chowdhury S, Sullivan JF, Dean DR, Vohra YK. Mechano-morphological studies of aligned nanofibrous scaffolds of polycaprolactone fabricated by electrospinning. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 17:969-84. [PMID: 17094636 DOI: 10.1163/156856206778366022] [Citation(s) in RCA: 113] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Mechanical and morphological studies of aligned nanofibrous meshes of poly(epsilon-caprolactone) (PCL) fabricated by electrospinning at different collector rotation speeds (0, 3000 and 6000 rpm) for application as bone tissue scaffolds are reported. SEM, XRD and DSC analyses were used for the morphological characterization of the nanofibers. Scaffolds have a nanofibrous morphology with fibers (majority) having a diameter in the range of 550-350 nm (depending on fiber uptake rates) and an interconnected pore structure. With the increase of collector rotation speed, the nanofibers become more aligned and oriented perpendicular to the axis of rotation. Deposition of fibers at higher fiber collection speeds has a profound effect on the morphology and mechanical properties of individual fibers and also the bulk fibrous meshes. Nanoindentation was used for the measurement of nanoscopic mechanical properties of individual fibers of the scaffolds. The hardness and Young's modulus of aligned fibers measured by nanoindentation decreased with collector rotation speeds. This reveals the difference in the local microscopic structure of the fibers deposited at higher speeds. The sequence of nanoscopic mechanical properties (hardness and modulus) of three fibers is PCL at 0 rpm > PCL at 3000 rpm > PCL at 6000 rpm. This may be explained due to the decrease in crystallinity of fibers at higher uptake rates. However, uni-axial tensile properties of (bulk) scaffolds (tensile strength and modulus) increased with increasing collector rotation speed. The average ultimate tensile strength of scaffolds (along the fiber alignment) increased from 2.21 +/- 0.23 MPa for PCL at uptake rate of zero rpm, to a value of 4.21 +/- 0.35 MPa for PCL at uptake rate of 3000 rpm and finally to 9.58 +/- 0.71 MPa for PCL at 6000 rpm. Similarly, the tensile modulus increased gradually from 6.12 +/- 0.8 MPa for PCL at uptake rate of zero rpm, to 11.93 +/- 1.22 MPa for PCL at uptake rate of 3000 rpm and to 33.20 +/- 1.98 MPa for PCL at 6000 rpm. The sequence of macroscopic mechanical properties (tensile strength and modulus) of three fibers, from highest to lowest, is PCL at 0 rpm < PCL at 3000 rpm < PCL at 6000 rpm. This is attributed to the increased fiber alignment and packing and decrease in inter-fiber pore size at higher uptake rates.
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Affiliation(s)
- Vinoy Thomas
- Department of Physics, University of Alabama at Birmingham, Birmingham, AL 35294, USA
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45
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Chen ZCC, Ekaputra AK, Gauthaman K, Adaikan PG, Yu H, Hutmacher DW. In vitro and in vivo analysis of co-electrospun scaffolds made of medical grade poly(ε-caprolactone) and porcine collagen. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 19:693-707. [DOI: 10.1163/156856208784089580] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Z. C. C. Chen
- a Department of Obstetrics and Gynecology, National University of Singapore, Singapore
| | - A. K. Ekaputra
- b Graduate Program in Bioengineering, Faculty of Medicine, National University of Singapore, Singapore
| | - K. Gauthaman
- c Department of Obstetrics and Gynecology, National University of Singapore, Singapore
| | - P. G. Adaikan
- d Department of Obstetrics and Gynecology, National University of Singapore, Singapore
| | - H. Yu
- e Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Institute of Bioengineering and Nanotechnology, A*STAR, Singapore
| | - D. W. Hutmacher
- f Institute of Health and Biomedical Innovation, Queensland University of Technology, 60 Musk Avenue, Kelvin Grove, QLD 4059, Australia
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Ulery BD, Nair LS, Laurencin CT. Biomedical Applications of Biodegradable Polymers. JOURNAL OF POLYMER SCIENCE. PART B, POLYMER PHYSICS 2011; 49:832-864. [PMID: 21769165 PMCID: PMC3136871 DOI: 10.1002/polb.22259] [Citation(s) in RCA: 1179] [Impact Index Per Article: 90.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Utilization of polymers as biomaterials has greatly impacted the advancement of modern medicine. Specifically, polymeric biomaterials that are biodegradable provide the significant advantage of being able to be broken down and removed after they have served their function. Applications are wide ranging with degradable polymers being used clinically as surgical sutures and implants. In order to fit functional demand, materials with desired physical, chemical, biological, biomechanical and degradation properties must be selected. Fortunately, a wide range of natural and synthetic degradable polymers has been investigated for biomedical applications with novel materials constantly being developed to meet new challenges. This review summarizes the most recent advances in the field over the past 4 years, specifically highlighting new and interesting discoveries in tissue engineering and drug delivery applications.
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Affiliation(s)
- Bret D. Ulery
- Department of Orthopaedic Surgery, New England Musculoskeletal Institute, University of Connecticut Health Center, Farmington, Connecticut 06030
- Institute of Regenerative Engineering, University of Connecticut Health Center, Farmington, Connecticut 06030
| | - Lakshmi S. Nair
- Department of Orthopaedic Surgery, New England Musculoskeletal Institute, University of Connecticut Health Center, Farmington, Connecticut 06030
- Institute of Regenerative Engineering, University of Connecticut Health Center, Farmington, Connecticut 06030
- Department of Chemical, Materials & Biomolecular Engineering, University of Connecticut, Storrs, Connecticut 06268
| | - Cato T. Laurencin
- Department of Orthopaedic Surgery, New England Musculoskeletal Institute, University of Connecticut Health Center, Farmington, Connecticut 06030
- Institute of Regenerative Engineering, University of Connecticut Health Center, Farmington, Connecticut 06030
- Department of Chemical, Materials & Biomolecular Engineering, University of Connecticut, Storrs, Connecticut 06268
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47
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Phipps MC, Clem WC, Catledge SA, Xu Y, Hennessy KM, Thomas V, Jablonsky MJ, Chowdhury S, Stanishevsky AV, Vohra YK, Bellis SL. Mesenchymal stem cell responses to bone-mimetic electrospun matrices composed of polycaprolactone, collagen I and nanoparticulate hydroxyapatite. PLoS One 2011; 6:e16813. [PMID: 21346817 PMCID: PMC3035635 DOI: 10.1371/journal.pone.0016813] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2010] [Accepted: 01/14/2011] [Indexed: 12/24/2022] Open
Abstract
The performance of biomaterials designed for bone repair depends, in part, on the ability of the material to support the adhesion and survival of mesenchymal stem cells (MSCs). In this study, a nanofibrous bone-mimicking scaffold was electrospun from a mixture of polycaprolactone (PCL), collagen I, and hydroxyapatite (HA) nanoparticles with a dry weight ratio of 50/30/20 respectively (PCL/col/HA). The cytocompatibility of this tri-component scaffold was compared with three other scaffold formulations: 100% PCL (PCL), 100% collagen I (col), and a bi-component scaffold containing 80% PCL/20% HA (PCL/HA). Scanning electron microscopy, fluorescent live cell imaging, and MTS assays showed that MSCs adhered to the PCL, PCL/HA and PCL/col/HA scaffolds, however more rapid cell spreading and significantly greater cell proliferation was observed for MSCs on the tri-component bone-mimetic scaffolds. In contrast, the col scaffolds did not support cell spreading or survival, possibly due to the low tensile modulus of this material. PCL/col/HA scaffolds adsorbed a substantially greater quantity of the adhesive proteins, fibronectin and vitronectin, than PCL or PCL/HA following in vitro exposure to serum, or placement into rat tibiae, which may have contributed to the favorable cell responses to the tri-component substrates. In addition, cells seeded onto PCL/col/HA scaffolds showed markedly increased levels of phosphorylated FAK, a marker of integrin activation and a signaling molecule known to be important for directing cell survival and osteoblastic differentiation. Collectively these results suggest that electrospun bone-mimetic matrices serve as promising degradable substrates for bone regenerative applications.
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Affiliation(s)
- Matthew C. Phipps
- Department of Physiology and Biophysics, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - William C. Clem
- Center for Nanoscale Materials and Biointegration, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Shane A. Catledge
- Center for Nanoscale Materials and Biointegration, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Department of Physics, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Yuanyuan Xu
- Department of Physiology and Biophysics, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Kristin M. Hennessy
- Department of Physiology and Biophysics, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Vinoy Thomas
- Center for Nanoscale Materials and Biointegration, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Department of Physics, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Michael J. Jablonsky
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Shafiul Chowdhury
- Center for Nanoscale Materials and Biointegration, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Department of Physics, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Andrei V. Stanishevsky
- Center for Nanoscale Materials and Biointegration, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Department of Physics, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Yogesh K. Vohra
- Center for Nanoscale Materials and Biointegration, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Department of Physics, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- * E-mail: (SLB); (YKV)
| | - Susan L. Bellis
- Department of Physiology and Biophysics, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Center for Nanoscale Materials and Biointegration, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- * E-mail: (SLB); (YKV)
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48
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Biodegradable Polymeric Assemblies for Biomedical Materials. POLYMERS IN NANOMEDICINE 2011. [DOI: 10.1007/12_2011_160] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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49
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Ruckh TT, Kumar K, Kipper MJ, Popat KC. Osteogenic differentiation of bone marrow stromal cells on poly(epsilon-caprolactone) nanofiber scaffolds. Acta Biomater 2010; 6:2949-59. [PMID: 20144747 DOI: 10.1016/j.actbio.2010.02.006] [Citation(s) in RCA: 104] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2009] [Revised: 01/28/2010] [Accepted: 02/01/2010] [Indexed: 12/18/2022]
Abstract
Nanofiber poly(epsilon-caprolactone) (PCL) scaffolds were fabricated by electrospinning, and their ability to enhance the osteoblastic behavior of marrow stromal cells (MSCs) in osteogenic media was investigated. MSCs were isolated from Wistar rats and cultured on nanofiber scaffolds to assess short-term cytocompatibility and long-term phenotypic behavior. Smooth PCL substrates were used as control surfaces. The short-term cytocompatibility results indicated that nanofiber scaffolds supported greater cell adhesion and viability compared with control surfaces. In osteogenic conditions, MSCs cultured on nanofiber scaffolds also displayed increased levels of alkaline phosphatase activity for 3 weeks of culture. Calcium phosphate mineralization was substantially accelerated on nanofiber scaffolds compared to control surfaces as indicated through von Kossa and calcium staining, scanning electron microscopy and energy-dispersive X-ray spectroscopy. Increased levels of intra- and extracellular levels of osteocalcin and osteopontin were observed on nanofiber scaffolds using immunofluorescence techniques after 3 weeks of culture. These results demonstrate the enhanced tissue regeneration property of nanofiber scaffolds, which may be of potential use for engineering osteogenic scaffolds for orthopedic applications.
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Affiliation(s)
- Timothy T Ruckh
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80523, USA
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50
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Khandwekar AP, Patil DP, Shouche Y, Doble M. Surface Engineering of Polycaprolactone by Biomacromolecules and their Blood Compatibility. J Biomater Appl 2010; 26:227-52. [DOI: 10.1177/0885328210367442] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Improving blood compatibility of biodegradable polymers is an area of intensive research in blood contacting devices. In this study, curdlan sulphate and heparin-modified poly (caprolactone) (PCL) hybrids were developed by physically entrapping these molecules on the PCL surface. This modification technique was performed by reversible gelation of the PCL surface region following exposure to a solvent and nonsolvent mixture. The presence of these biomacromolecules on the PCL surface was verified by atomic force microscopy (AFM) and scanning electron microscopy and energy dispersive X-ray analysis (SEM-EDAX) analysis, while wettability of the films was investigated by dynamic contact angle measurements. The blood compatibilities of the surface-modified films were examined using in vitro platelet and leukocyte adhesion and thrombus formation. Mouse RAW 264.7 macrophage cells were used to assess the cell adhesion and inflammatory response to the modified surface by quantifying mRNA expression levels of proinflammatory cytokines namely TNF-α and IL-1β using real-time polymerase chain reaction (RT-PCR). A lower platelet and leukocyte adhesion and activation was observed on the modified films incubated with whole human blood for 2 h. The thrombus formation on the PCL was significantly decreased upon immobilization of both curdlan sulphate (39%, *p<0.05) and heparin (28%, *p<0.01) when compared to bare PCL (80%). All of these results revealed that improved blood compatibility was obtained by surface entrapment of both curdlan sulphate (CURS) and heparin (HEP) onto PCL films. Both PCL-CURS and PCL-HEP films reduced RAW 264.7 macrophage cell adhesion (*p<0.05) with respect to the base unmodified PCL. The cellular inflammatory response was suppressed on the modified substrates. The mRNA expression levels of proinflammmatory cytokines (TNF-α and IL-1β) were upregulated on bare PCL, while it was significantly lower on PCL-CURS and PCL-HEP substrates (**p<0.001). Thus, this biomacromolecule entrapment process can be applied on PCL in order to achieve improved blood compatibility and reduced inflammatory host response for its future blood contacting applications.
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Affiliation(s)
- Anand P. Khandwekar
- Department of Biotechnology, Indian Institute of Technology Madras Chennai 600036, India
| | - Deepak P. Patil
- National Center for Cell Science, Ganeshkhind, Pune 411007, India
| | - Yogesh Shouche
- National Center for Cell Science, Ganeshkhind, Pune 411007, India
| | - Mukesh Doble
- Department of Biotechnology, Indian Institute of Technology Madras Chennai 600036, India,
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