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Hao M, Xue L, Wen X, Sun L, Zhang L, Xing K, Hu X, Xu J, Xing D. Advancing bone regeneration: Unveiling the potential of 3D cell models in the evaluation of bone regenerative materials. Acta Biomater 2024:S1742-7061(24)00288-5. [PMID: 38815683 DOI: 10.1016/j.actbio.2024.05.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 05/23/2024] [Accepted: 05/24/2024] [Indexed: 06/01/2024]
Abstract
Bone, a rigid yet regenerative tissue, has garnered extensive attention for its impressive healing abilities. Despite advancements in understanding bone repair and creating treatments for bone injuries, handling nonunions and large defects remains a major challenge in orthopedics. The rise of bone regenerative materials is transforming the approach to bone repair, offering innovative solutions for nonunions and significant defects, and thus reshaping orthopedic care. Evaluating these materials effectively is key to advancing bone tissue regeneration, especially in difficult healing scenarios, making it a critical research area. Traditional evaluation methods, including two-dimensional cell models and animal models, have limitations in predicting accurately. This has led to exploring alternative methods, like 3D cell models, which provide fresh perspectives for assessing bone materials' regenerative potential. This paper discusses various techniques for constructing 3D cell models, their pros and cons, and crucial factors to consider when using these models to evaluate bone regenerative materials. We also highlight the significance of 3D cell models in the in vitro assessments of these materials, discuss their current drawbacks and limitations, and suggest future research directions. STATEMENT OF SIGNIFICANCE: This work addresses the challenge of evaluating bone regenerative materials (BRMs) crucial for bone tissue engineering. It explores the emerging role of 3D cell models as superior alternatives to traditional methods for assessing these materials. By dissecting the construction, key factors of evaluating, advantages, limitations, and practical considerations of 3D cell models, the paper elucidates their significance in overcoming current evaluation method shortcomings. It highlights how these models offer a more physiologically relevant and ethically preferable platform for the precise assessment of BRMs. This contribution is particularly significant for "Acta Biomaterialia" readership, as it not only synthesizes current knowledge but also propels the discourse forward in the search for advanced solutions in bone tissue engineering and regeneration.
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Affiliation(s)
- Minglu Hao
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao 266071, China; Cancer institute, Qingdao University, Qingdao 266071, China.
| | - Linyuan Xue
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao 266071, China; Cancer institute, Qingdao University, Qingdao 266071, China
| | - Xiaobo Wen
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao 266071, China; Cancer institute, Qingdao University, Qingdao 266071, China
| | - Li Sun
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao 266071, China; Cancer institute, Qingdao University, Qingdao 266071, China
| | - Lei Zhang
- Department of Chemical Engineering and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L3G1, Canada
| | - Kunyue Xing
- Alliance Manchester Business School, The University of Manchester, Manchester M139PL, UK
| | - Xiaokun Hu
- Department of Interventional Medical Center, Affiliated Hospital of Qingdao University, Qingdao 26600, China
| | - Jiazhen Xu
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao 266071, China; Cancer institute, Qingdao University, Qingdao 266071, China.
| | - Dongming Xing
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao 266071, China; Cancer institute, Qingdao University, Qingdao 266071, China; School of Life Sciences, Tsinghua University, Beijing 100084, China.
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Gupta T, Ghosh SB, Bandyopadhyay-Ghosh S, Sain M. Is it possible to 3D bioprint load-bearing bone implants? A critical review. Biofabrication 2023; 15:042003. [PMID: 37669643 DOI: 10.1088/1758-5090/acf6e1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Accepted: 09/05/2023] [Indexed: 09/07/2023]
Abstract
Rehabilitative capabilities of any tissue engineered scaffold rely primarily on the triad of (i) biomechanical properties such as mechanical properties and architecture, (ii) chemical behavior such as regulation of cytokine expression, and (iii) cellular response modulation (including their recruitment and differentiation). The closer the implant can mimic the native tissue, the better it can rehabilitate the damage therein. Among the available fabrication techniques, only 3D bioprinting (3DBP) can satisfactorily replicate the inherent heterogeneity of the host tissue. However, 3DBP scaffolds typically suffer from poor mechanical properties, thereby, driving the increased research interest in development of load-bearing 3DBP orthopedic scaffolds in recent years. Typically, these scaffolds involve multi-material 3D printing, comprising of at-least one bioink and a load-bearing ink; such that mechanical and biological requirements of the biomaterials are decoupled. Ensuring high cellular survivability and good mechanical properties are of key concerns in all these studies. 3DBP of such scaffolds is in early developmental stages, and research data from only a handful of preliminary animal studies are available, owing to limitations in print-capabilities and restrictive materials library. This article presents a topically focused review of the state-of-the-art, while highlighting aspects like available 3DBP techniques; biomaterials' printability; mechanical and degradation behavior; and their overall bone-tissue rehabilitative efficacy. This collection amalgamates and critically analyses the research aimed at 3DBP of load-bearing scaffolds for fulfilling demands of personalized-medicine. We highlight the recent-advances in 3DBP techniques employing thermoplastics and phosphate-cements for load-bearing applications. Finally, we provide an outlook for possible future perspectives of 3DBP for load-bearing orthopedic applications. Overall, the article creates ample foundation for future research, as it gathers the latest and ongoing research that scientists could utilize.
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Affiliation(s)
- Tanmay Gupta
- Engineered Biomedical Materials Research and Innovation Centre (EnBioMatRIC), Department of Mechanical Engineering, Manipal University Jaipur, Jaipur, Rajasthan, India
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, Canada
| | - Subrata Bandhu Ghosh
- Engineered Biomedical Materials Research and Innovation Centre (EnBioMatRIC), Department of Mechanical Engineering, Manipal University Jaipur, Jaipur, Rajasthan, India
| | - Sanchita Bandyopadhyay-Ghosh
- Engineered Biomedical Materials Research and Innovation Centre (EnBioMatRIC), Department of Mechanical Engineering, Manipal University Jaipur, Jaipur, Rajasthan, India
| | - Mohini Sain
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, Canada
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Song B, Fang L, Mao X, Ye X, Yan Z, Ma Q, Shi Z, Hu Y, Zhu Y, Cheng Y. Gelatin-grafted tubular asymmetric scaffolds promote ureteral regeneration via activation of the integrin/Erk signaling pathway. Front Bioeng Biotechnol 2023; 10:1092543. [PMID: 36686259 PMCID: PMC9849368 DOI: 10.3389/fbioe.2022.1092543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 12/13/2022] [Indexed: 01/06/2023] Open
Abstract
Introduction: The repair of a diseased ureter is an urgent clinical issue that needs to be solved. A tissue-engineered scaffold for ureteral replacement is currently insufficient due to its incompetent bioactivity, especially in long-segment abnormalities. The primary reason is the failure of urothelialization on scaffolds. Methods: In this work, we investigated the ability of gelatin-grafted tubular scaffold in ureteral repairment and its related biological mechanism. We designed various porous asymmetric poly (L-lactic acid) (PLLA)/poly (L-lactide-co-e-caprolactone) (PLCL) tubes with a thermally induced phase separation (TIPS) method via a change in the ratio of solvents (named PP). To regulate the phenotype of urothelial cells and ureteral reconstruction, gelatin was grafted onto the tubular scaffold using ammonolysis and glutaraldehyde crosslinking (named PP-gel). The in vitro and in vivo experiments were performed to test the biological function and the mechanism of the scaffolds. Results and Discussion: The hydrophilicity of the scaffold significantly increased after gelatin grafting, which promoted the adhesion and proliferation of urothelial cells. Through subcutaneous implantation in rats, PP-gel scaffolds demonstrated good biocompatibility. The in vivo replacement showed that PP-gel could improve urothelium regeneration and maintain renal function after the ureter was replaced with an ∼4 cm-long PP-gel tube using New Zealand rabbits as the experimental animals. The related biologic mechanism of ureteral reconstruction was detected in detail. The gelatin-grafted scaffold upgraded the integrin α6/β4 on the urothelial cell membrane, which phosphorylates the focal adhesion kinase (FAK) and enhances urothelialization via the MAPK/Erk signaling pathway. Conclusion: All these results confirmed that the PP46-gel scaffold is a promising candidate for the constitution of an engineered ureter and to repair long-segment ureteral defects.
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Affiliation(s)
- Baiyang Song
- School of Medicine, Ningbo University, Ningbo, China,Department of Urology, Ningbo First Hospital, Ningbo, China
| | - Li Fang
- Department of Urology, Ningbo First Hospital, Ningbo, China,Ningbo Clinical Research Center for Urological Disease, Ningbo, China
| | - Xufeng Mao
- School of Medicine, Ningbo University, Ningbo, China
| | - Xianwang Ye
- Department of Radiology, Ningbo First Hospital, Ningbo, China
| | - Zejun Yan
- Department of Urology, Ningbo First Hospital, Ningbo, China,Ningbo Clinical Research Center for Urological Disease, Ningbo, China
| | - Qi Ma
- Department of Urology, Ningbo First Hospital, Ningbo, China,Ningbo Clinical Research Center for Urological Disease, Ningbo, China
| | - Zewen Shi
- School of Medicine, Ningbo University, Ningbo, China
| | - Yiwei Hu
- School of Medicine, Ningbo University, Ningbo, China
| | - Yabin Zhu
- School of Medicine, Ningbo University, Ningbo, China,*Correspondence: Yabin Zhu, ; Yue Cheng,
| | - Yue Cheng
- Department of Urology, Ningbo First Hospital, Ningbo, China,Ningbo Clinical Research Center for Urological Disease, Ningbo, China,*Correspondence: Yabin Zhu, ; Yue Cheng,
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Coudane J, Nottelet B, Mouton J, Garric X, Van Den Berghe H. Poly(ε-caprolactone)-Based Graft Copolymers: Synthesis Methods and Applications in the Biomedical Field: A Review. Molecules 2022; 27:7339. [PMID: 36364164 PMCID: PMC9653691 DOI: 10.3390/molecules27217339] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 10/18/2022] [Accepted: 10/26/2022] [Indexed: 09/24/2023] Open
Abstract
Synthetic biopolymers are attractive alternatives to biobased polymers, especially because they rarely induce an immune response in a living organism. Poly ε-caprolactone (PCL) is a well-known synthetic aliphatic polyester universally used for many applications, including biomedical and environmental ones. Unlike poly lactic acid (PLA), PCL has no chiral atoms, and it is impossible to play with the stereochemistry to modify its properties. To expand the range of applications for PCL, researchers have investigated the possibility of grafting polymer chains onto the PCL backbone. As the PCL backbone is not functionalized, it must be first functionalized in order to be able to graft reactive groups onto the PCL chain. These reactive groups will then allow the grafting of new reagents and especially new polymer chains. Grafting of polymer chains is mainly carried out by "grafting from" or "grafting onto" methods. In this review we describe the main structures of the graft copolymers produced, their different synthesis methods, and their main characteristics and applications, mainly in the biomedical field.
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Affiliation(s)
- Jean Coudane
- Department of Polymers for Health and Biomaterials, Institute of Biomolecules Max Mousseron, UMR 5247, University of Montpellier, CNRS, ENSCM, 34000 Montpellier, France
| | - Benjamin Nottelet
- Department of Polymers for Health and Biomaterials, Institute of Biomolecules Max Mousseron, UMR 5247, University of Montpellier, CNRS, ENSCM, 34000 Montpellier, France
| | - Julia Mouton
- Polymers Composites and Hybrids, IMT Mines d’Alès, 30100 Alès, France
- EPF Graduate School of Engineering, 34000 Montpellier, France
| | - Xavier Garric
- Department of Polymers for Health and Biomaterials, Institute of Biomolecules Max Mousseron, UMR 5247, University of Montpellier, CNRS, ENSCM, 34000 Montpellier, France
- Department of Pharmacy, Nîmes University Hospital, 30900 Nimes, France
| | - Hélène Van Den Berghe
- Department of Polymers for Health and Biomaterials, Institute of Biomolecules Max Mousseron, UMR 5247, University of Montpellier, CNRS, ENSCM, 34000 Montpellier, France
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Chain-End Functionalization of Poly(ε-caprolactone) for Chemical Binding with Gelatin: Binary Electrospun Scaffolds with Improved Physico-Mechanical Characteristics and Cell Adhesive Properties. Polymers (Basel) 2022; 14:polym14194203. [PMID: 36236153 PMCID: PMC9570970 DOI: 10.3390/polym14194203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/03/2022] [Accepted: 10/04/2022] [Indexed: 11/17/2022] Open
Abstract
Composite biocompatible scaffolds, obtained using the electrospinning (ES) technique, are highly promising for biomedical application thanks to their high surface area, porosity, adjustable fiber diameter, and permeability. However, the combination of synthetic biodegradable (such as poly(ε-caprolactone) PCL) and natural (such as gelatin Gt) polymers is complicated by the problem of low compatibility of the components. Previously, this problem was solved by PCL grafting and/or Gt cross-linking after ES molding. In the present study, composite fibrous scaffolds consisting of PCL and Gt were fabricated by the electrospinning (ES) method using non-functionalized PCL1 or NHS-functionalized PCL2 and hexafluoroisopropanol as a solvent. To provide covalent binding between PCL2 and Gt macromolecules, NHS-functionalized methyl glutarate was synthesized and studied in model reactions with components of spinning solution. It was found that selective formation of amide bonds, which provide complete covalent bonding of Gt in PCL/Gt composite, requires the presence of weak acid. With the use of the optimized ES method, fibrous mats with different PCL/Gt ratios were prepared. The sample morphology (SEM), hydrolytic resistance (FT-IR), cell adhesion and viability (MTT assay), cell penetration (fluorescent microscopy), and mechanical characteristics of the samples were studied. PCL2-based films with a Gt content of 20 wt% have demonstrated the best set of properties.
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Fibrous 3D printed poly(ɛ)caprolactone tissue engineering scaffold for in vitro cell models. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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7
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Bamane PB, Jagtap RN. Development of the hydrophilic additive by suspension copolymerisation of methacrylic acid with isodecyl methacrylate for easy-to-clean coatings. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04193-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Park JH, Ahn M, Park SH, Kim H, Bae M, Park W, Hollister SJ, Kim SW, Cho DW. 3D bioprinting of a trachea-mimetic cellular construct of a clinically relevant size. Biomaterials 2021; 279:121246. [PMID: 34775331 PMCID: PMC8663475 DOI: 10.1016/j.biomaterials.2021.121246] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 11/05/2021] [Accepted: 11/08/2021] [Indexed: 12/16/2022]
Abstract
Despite notable advances in extrusion-based 3D bioprinting, it remains a challenge to create a clinically-sized cellular construct using extrusion-based 3D printing due to long printing times adversely affecting cell viability and functionality. Here, we present an advanced extrusion-based 3D bioprinting strategy composed of a two-step printing process to facilitate creation of a trachea-mimetic cellular construct of clinically relevant size. A porous bellows framework is first printed using typical extrusion-based 3D printing. Selective printing of cellular components, such as cartilage rings and epithelium lining, is then performed on the outer grooves and inner surface of the bellows framework by a rotational printing process. With this strategy, 3D bioprinting of a trachea-mimetic cellular construct of clinically relevant size is achieved in significantly less total printing time compared to a typical extrusion-based 3D bioprinting strategy which requires printing of an additional sacrificial material. Tracheal cartilage formation was successfully demonstrated in a nude mouse model through a subcutaneous implantation study of trachea-mimetic cellular constructs wrapped with a sinusoidal-patterned tubular mesh preventing rapid resorption of cartilage rings in vivo. This two-step 3D bioprinting for a trachea-mimetic cellular construct of clinically relevant size can provide a fundamental step towards clinical translation of 3D bioprinting based tracheal reconstruction.
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Affiliation(s)
- Jeong Hun Park
- Wallace H. Coulter Department of Biomedical Engineering and Center for 3D Medical Fabrication, Georgia Institute of Technology and Emory University, 313 Ferst Drive, Atlanta, GA, 30332, USA
| | - Minjun Ahn
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Kyungbuk, 37673, Republic of Korea
| | - Sun Hwa Park
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, 137-710, Republic of Korea
| | - Hyeonji Kim
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Kyungbuk, 37673, Republic of Korea
| | - Mihyeon Bae
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Kyungbuk, 37673, Republic of Korea
| | - Wonbin Park
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Kyungbuk, 37673, Republic of Korea
| | - Scott J Hollister
- Wallace H. Coulter Department of Biomedical Engineering and Center for 3D Medical Fabrication, Georgia Institute of Technology and Emory University, 313 Ferst Drive, Atlanta, GA, 30332, USA.
| | - Sung Won Kim
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, 137-710, Republic of Korea.
| | - Dong-Woo Cho
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Kyungbuk, 37673, Republic of Korea.
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Nasef MM, Gupta B, Shameli K, Verma C, Ali RR, Ting TM. Engineered Bioactive Polymeric Surfaces by Radiation Induced Graft Copolymerization: Strategies and Applications. Polymers (Basel) 2021; 13:3102. [PMID: 34578003 PMCID: PMC8473120 DOI: 10.3390/polym13183102] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 09/03/2021] [Accepted: 09/05/2021] [Indexed: 11/16/2022] Open
Abstract
The interest in developing antimicrobial surfaces is currently surging with the rise in global infectious disease events. Radiation-induced graft copolymerization (RIGC) is a powerful technique enabling permanent tunable and desired surface modifications imparting antimicrobial properties to polymer substrates to prevent disease transmission and provide safer biomaterials and healthcare products. This review aims to provide a broader perspective of the progress taking place in strategies for designing various antimicrobial polymeric surfaces using RIGC methods and their applications in medical devices, healthcare, textile, tissue engineering and food packing. Particularly, the use of UV, plasma, electron beam (EB) and γ-rays for biocides covalent immobilization to various polymers surfaces including nonwoven fabrics, films, nanofibers, nanocomposites, catheters, sutures, wound dressing patches and contact lenses is reviewed. The different strategies to enhance the grafted antimicrobial properties are discussed with an emphasis on the emerging approach of in-situ formation of metal nanoparticles (NPs) in radiation grafted substrates. The current applications of the polymers with antimicrobial surfaces are discussed together with their future research directions. It is expected that this review would attract attention of researchers and scientists to realize the merits of RIGC in developing timely, necessary antimicrobial materials to mitigate the fast-growing microbial activities and promote hygienic lifestyles.
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Affiliation(s)
- Mohamed Mahmoud Nasef
- Advanced Materials Research Group, Center of Hydrogen Energy, Universiti Teknologi Malaysia, Jalan Sultan Yahya Putra, Kuala Lumpur 54100, Malaysia;
- Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur 54100, Malaysia;
| | - Bhuvanesh Gupta
- Bioengineering Laboratory, Department of Textile Technology, Indian Institute of Technology, New Delhi 110016, India; (B.G.); (C.V.)
| | - Kamyar Shameli
- Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur 54100, Malaysia;
| | - Chetna Verma
- Bioengineering Laboratory, Department of Textile Technology, Indian Institute of Technology, New Delhi 110016, India; (B.G.); (C.V.)
| | - Roshafima Rasit Ali
- Advanced Materials Research Group, Center of Hydrogen Energy, Universiti Teknologi Malaysia, Jalan Sultan Yahya Putra, Kuala Lumpur 54100, Malaysia;
- Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur 54100, Malaysia;
| | - Teo Ming Ting
- Radiation Processing Technology Division, Malaysian Nuclear Agency, Kajang 43000, Malaysia;
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Fang S, Ellman DG, Andersen DC. Review: Tissue Engineering of Small-Diameter Vascular Grafts and Their In Vivo Evaluation in Large Animals and Humans. Cells 2021; 10:713. [PMID: 33807009 PMCID: PMC8005053 DOI: 10.3390/cells10030713] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/10/2021] [Accepted: 03/15/2021] [Indexed: 12/15/2022] Open
Abstract
To date, a wide range of materials, from synthetic to natural or a mixture of these, has been explored, modified, and examined as small-diameter tissue-engineered vascular grafts (SD-TEVGs) for tissue regeneration either in vitro or in vivo. However, very limited success has been achieved due to mechanical failure, thrombogenicity or intimal hyperplasia, and improvements of the SD-TEVG design are thus required. Here, in vivo studies investigating novel and relative long (10 times of the inner diameter) SD-TEVGs in large animal models and humans are identified and discussed, with emphasis on graft outcome based on model- and graft-related conditions. Only a few types of synthetic polymer-based SD-TEVGs have been evaluated in large-animal models and reflect limited success. However, some polymers, such as polycaprolactone (PCL), show favorable biocompatibility and potential to be further modified and improved in the form of hybrid grafts. Natural polymer- and cell-secreted extracellular matrix (ECM)-based SD-TEVGs tested in large animals still fail due to a weak strength or thrombogenicity. Similarly, native ECM-based SD-TEVGs and in-vitro-developed hybrid SD-TEVGs that contain xenogeneic molecules or matrix seem related to a harmful graft outcome. In contrast, allogeneic native ECM-based SD-TEVGs, in-vitro-developed hybrid SD-TEVGs with allogeneic banked human cells or isolated autologous stem cells, and in-body tissue architecture (IBTA)-based SD-TEVGs seem to be promising for the future, since they are suitable in dimension, mechanical strength, biocompatibility, and availability.
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Affiliation(s)
- Shu Fang
- Laboratory of Molecular and Cellular Cardiology, Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, J. B. Winsløwsvej 25, 5000 Odense C, Denmark; (D.G.E.); (D.C.A.)
- The Danish Regenerative Center, Odense University Hospital, J. B. Winsløwsvej 4, 5000 Odense C, Denmark
- Institute of Clinical Research, University of Southern Denmark, J. B. Winsløwsvej 19, 5000 Odense C, Denmark
| | - Ditte Gry Ellman
- Laboratory of Molecular and Cellular Cardiology, Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, J. B. Winsløwsvej 25, 5000 Odense C, Denmark; (D.G.E.); (D.C.A.)
- Institute of Clinical Research, University of Southern Denmark, J. B. Winsløwsvej 19, 5000 Odense C, Denmark
| | - Ditte Caroline Andersen
- Laboratory of Molecular and Cellular Cardiology, Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, J. B. Winsløwsvej 25, 5000 Odense C, Denmark; (D.G.E.); (D.C.A.)
- The Danish Regenerative Center, Odense University Hospital, J. B. Winsløwsvej 4, 5000 Odense C, Denmark
- Institute of Clinical Research, University of Southern Denmark, J. B. Winsløwsvej 19, 5000 Odense C, Denmark
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Donate R, Monzón M, Alemán-Domínguez ME. Additive manufacturing of PLA-based scaffolds intended for bone regeneration and strategies to improve their biological properties. E-POLYMERS 2020. [DOI: 10.1515/epoly-2020-0046] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractPolylactic acid (PLA) is one of the most commonly used materials in the biomedical sector because of its processability, mechanical properties and biocompatibility. Among the different techniques that are feasible to process this biomaterial, additive manufacturing (AM) has gained attention recently, as it provides the possibility of tuning the design of the structures. This flexibility in the design stage allows the customization of the parts in order to optimize their use in the tissue engineering field. In the recent years, the application of PLA for the manufacture of bone scaffolds has been especially relevant, since numerous studies have proven the potential of this biomaterial for bone regeneration. This review contains a description of the specific requirements in the regeneration of bone and how the state of the art have tried to address them with different strategies to develop PLA-based scaffolds by AM techniques and with improved biofunctionality.
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Affiliation(s)
- Ricardo Donate
- Departamento de Ingeniería Mecánica, Universidad de Las Palmas de Gran Canaria, Campus Universitario de Tafira s/n, 35017, Las Palmas, Spain
| | - Mario Monzón
- Departamento de Ingeniería Mecánica, Universidad de Las Palmas de Gran Canaria, Campus Universitario de Tafira s/n, 35017, Las Palmas, Spain
| | - María Elena Alemán-Domínguez
- Departamento de Ingeniería Mecánica, Universidad de Las Palmas de Gran Canaria, Campus Universitario de Tafira s/n, 35017, Las Palmas, Spain
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12
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Martins C, Chauhan VM, Araújo M, Abouselo A, Barrias CC, Aylott JW, Sarmento B. Advanced polymeric nanotechnology to augment therapeutic delivery and disease diagnosis. Nanomedicine (Lond) 2020; 15:2287-2309. [PMID: 32945230 DOI: 10.2217/nnm-2020-0145] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Therapeutic and diagnostic payloads are usually associated with properties that compromise their efficacy, such as poor aqueous solubility, short half-life, low bioavailability, nonspecific accumulation and diverse side effects. Nanotechnological solutions have emerged to circumvent some of these drawbacks, augmenting therapeutic and/or diagnostic outcomes. Nanotechnology has benefited from the rise in polymer science research for the development of novel nanosystems for therapeutic and diagnostic purposes. Polymers are a widely used class of biomaterials, with a considerable number of regulatory approvals for application in clinics. In addition to their versatility in production and functionalization, several synthetic and natural polymers demonstrate biocompatible properties that dictate their successful biological performance. This article highlights the physicochemical characteristics of a variety of natural and synthetic biocompatible polymers, as well as their role in the manufacture of nanotechnology-based systems, state-of-art applications in disease treatment and diagnosis, and current challenges in finding a way to clinics.
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Affiliation(s)
- Cláudia Martins
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-393, Porto, Portugal.,INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 208, 4200-393, Porto, Portugal.,School of Pharmacy, Boots Science Building, University of Nottingham, Nottingham, NG7 2RD, UK.,ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Ruade Jorge Viterbo Ferreira 228, 4050-313, Porto, Portugal
| | - Veeren M Chauhan
- School of Pharmacy, Boots Science Building, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Marco Araújo
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-393, Porto, Portugal.,INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 208, 4200-393, Porto, Portugal
| | - Amjad Abouselo
- School of Pharmacy, Boots Science Building, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Cristina C Barrias
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-393, Porto, Portugal.,INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 208, 4200-393, Porto, Portugal
| | - Jonathan W Aylott
- School of Pharmacy, Boots Science Building, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Bruno Sarmento
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-393, Porto, Portugal.,INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 208, 4200-393, Porto, Portugal.,CESPU - Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde, Rua Central de Gandra 1317, 4585-116, Gandra, Portugal
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13
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Maharjan B, Kaliannagounder VK, Jang SR, Awasthi GP, Bhattarai DP, Choukrani G, Park CH, Kim CS. In-situ polymerized polypyrrole nanoparticles immobilized poly(ε-caprolactone) electrospun conductive scaffolds for bone tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 114:111056. [DOI: 10.1016/j.msec.2020.111056] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 04/10/2020] [Accepted: 05/04/2020] [Indexed: 12/28/2022]
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14
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Functional Micro- and Nanofibers Obtained by Nonwoven Post-Modification. Polymers (Basel) 2020; 12:polym12051087. [PMID: 32397603 PMCID: PMC7285086 DOI: 10.3390/polym12051087] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 04/29/2020] [Accepted: 05/06/2020] [Indexed: 12/14/2022] Open
Abstract
Micro- and nanofibers are historically-known materials that are continuously reinvented due to their valuable properties. They display promise for applications in many fields, from tissue engineering to catalysis or sensors. In the first application, micro- and nanofibers are mainly produced from a limited library of biomaterials with properties that need alteration before use. Post-modification is a very effective method for attaining on-demand features and functions of nonwovens. This review summarizes and presents methods of functionalization of nonwovens produced by electrostatic means. The reviewed modifications are grouped into physical methods, chemical modification, and mixed methods.
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15
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Fabrication of radiopaque drug-eluting beads based on Lipiodol/biodegradable-polymer for image-guided transarterial chemoembolization of unresectable hepatocellular carcinoma. Polym Degrad Stab 2020. [DOI: 10.1016/j.polymdegradstab.2020.109106] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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16
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Fernández-Pérez J, Kador KE, Lynch AP, Ahearne M. Characterization of extracellular matrix modified poly(ε-caprolactone) electrospun scaffolds with differing fiber orientations for corneal stroma regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 108:110415. [DOI: 10.1016/j.msec.2019.110415] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 11/08/2019] [Accepted: 11/09/2019] [Indexed: 10/25/2022]
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17
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Nachlas ALY, Li S, Streeter BW, De Jesus Morales KJ, Sulejmani F, Madukauwa-David DI, Bejleri D, Sun W, Yoganathan AP, Davis ME. A multilayered valve leaflet promotes cell-laden collagen type I production and aortic valve hemodynamics. Biomaterials 2020; 240:119838. [PMID: 32092591 DOI: 10.1016/j.biomaterials.2020.119838] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 01/27/2020] [Accepted: 01/31/2020] [Indexed: 12/18/2022]
Abstract
Patients with aortic heart valve disease are limited to valve replacements that lack the ability to grow and remodel. This presents a major challenge for pediatric patients who require a valve capable of somatic growth and at a smaller size. A patient-specific heart valve capable of growth and remodeling while maintaining proper valve function would address this major issue. Here, we recreate the native valve leaflet structure composed of poly-ε-caprolactone (PCL) and cell-laden gelatin-methacrylate/poly (ethylene glycol) diacrylate (GelMA/PEGDA) hydrogels using 3D printing and molding, and then evaluate the ability of the multilayered scaffold to produce collagen matrix under physiological shear stress conditions. We also characterized the valve hemodynamics under aortic physiological flow conditions. The valve's fibrosa layer was replicated by 3D printing PCL in a circumferential direction similar to collagen alignment in the native leaflet, and GelMA/PEGDA sustained and promoted cell viability in the spongiosa/ventricularis layers. We found that collagen type I production can be increased in the multilayered scaffold when it is exposed to pulsatile shear stress conditions over static conditions. When the PCL component was mounted onto a valve ring and tested under physiological aortic valve conditions, the hemodynamics were comparable to commercially available valves. Our results demonstrate that a structurally representative valve leaflet can be generated using 3D printing and that the PCL layer of the leaflet can sustain proper valve function under physiological aortic valve conditions.
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Affiliation(s)
- Aline L Y Nachlas
- Wallace H Coulter Department of Biomedical Engineering, Emory University and Georgia Institute of Technology, Atlanta, GA, USA
| | - Siyi Li
- Wallace H Coulter Department of Biomedical Engineering, Emory University and Georgia Institute of Technology, Atlanta, GA, USA
| | - Benjamin W Streeter
- Wallace H Coulter Department of Biomedical Engineering, Emory University and Georgia Institute of Technology, Atlanta, GA, USA
| | - Kenneth J De Jesus Morales
- Wallace H Coulter Department of Biomedical Engineering, Emory University and Georgia Institute of Technology, Atlanta, GA, USA
| | - Fatiesa Sulejmani
- Wallace H Coulter Department of Biomedical Engineering, Emory University and Georgia Institute of Technology, Atlanta, GA, USA
| | - David Immanuel Madukauwa-David
- Bioengineering Graduate Program, Georgia Institute of Technology, Atlanta, GA, USA; George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Donald Bejleri
- Wallace H Coulter Department of Biomedical Engineering, Emory University and Georgia Institute of Technology, Atlanta, GA, USA
| | - Wei Sun
- Wallace H Coulter Department of Biomedical Engineering, Emory University and Georgia Institute of Technology, Atlanta, GA, USA
| | - Ajit P Yoganathan
- Wallace H Coulter Department of Biomedical Engineering, Emory University and Georgia Institute of Technology, Atlanta, GA, USA
| | - Michael E Davis
- Wallace H Coulter Department of Biomedical Engineering, Emory University and Georgia Institute of Technology, Atlanta, GA, USA; Children's Heart Research & Outcomes (HeRO) Center, Children's Healthcare of Atlanta & Emory University, Atlanta, GA, USA.
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18
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Inthanon K, Janvikul W, Ongchai S, Chomdej S. Intrinsic Cellular Responses of Human Wharton's Jelly Mesenchymal Stem Cells Influenced by O 2-Plasma-Modified and Unmodified Surface of Alkaline-Hydrolyzed 2D and 3D PCL Scaffolds. J Funct Biomater 2019; 10:E52. [PMID: 31752199 PMCID: PMC6963654 DOI: 10.3390/jfb10040052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 10/31/2019] [Accepted: 11/17/2019] [Indexed: 01/09/2023] Open
Abstract
Polycaprolactone (PCL), a hydrophobic-degradable polyester, has been widely investigated and extensively developed, to increase the biocompatibility for tissue engineering. This research was the first trial to evaluate the intrinsic biological responses of human Wharton's Jelly Mesenchymal Stem Cells (hWJMSCs) cultured on alkaline hydrolysis and low-pressure oxygen plasma modified 2D and 3D PCL scaffolds, without adding any differentiation inducers; this has not been reported before. Four types of the substrate were newly established: 2D plasma-treated PCL (2D-TP), 2D non-plasma-treated PCL (2D-NP), 3D plasma-treated PCL (3D-TP), and 3D non-plasma-treated PCL (3D-NP). Physicochemical characterization revealed that only plasma-treated PCL scaffolds significantly increased the hydrophilicity and % oxygen/carbon ratio on the surfaces. The RMS roughness of 3D was higher than 2D conformation, whilst the plasma-treated surfaces were rougher than the non-plasma treated ones. The cytocompatibility test demonstrated that the 2D PCLs enhanced the initial cell attachment in comparison to the 3Ds, indicated by a higher expression of focal adhesion kinase. Meanwhile, the 3Ds promoted cell proliferation and migration as evidence of higher cyclin-A expression and filopodial protrusion, respectively. The 3Ds potentially protected the cell from apoptosis/necrosis but also altered the pluripotency/differentiation-related gene expression. In summary, the different configuration and surface properties of PCL scaffolds displayed the significant potential and effectiveness for facilitating stem cell growth and differentiation in vitro. The cell-substrate interactions on modified surface PCL may provide some information which could be further applied in substrate architecture for stem cell accommodation in cell delivery system for tissue repair.
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Affiliation(s)
- Kewalin Inthanon
- Department of Biotechnology, Faculty of Science and Technology, Thammasat University, Lampang 52190, Thailand
| | - Wanida Janvikul
- National Metal and Materials Technology Center, Pathumthani 12120, Thailand;
| | - Siriwan Ongchai
- Thailand Excellence Centre for Tissue Engineering and Stem Cells, Department of Biochemistry and the Center of Excellence for Innovation in Chemistry, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand;
| | - Siriwadee Chomdej
- Center of Excellence in Bioresources for Agriculture, Industry and Medicine Chiang Mai University, Chiang Mai 50200, Thailand
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19
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Kuo YC, Lee IH, Rajesh R. Self-assembled ternary poly(vinyl alcohol)-alginate-gelatin hydrogel with controlled-release nanoparticles for pancreatic differentiation of iPS cells. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2019.09.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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20
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Fibrous Materials Made of Poly( ε-caprolactone)/Poly(ethylene oxide) -b-Poly( ε-caprolactone) Blends Support Neural Stem Cells Differentiation. Polymers (Basel) 2019; 11:polym11101621. [PMID: 31597231 PMCID: PMC6835932 DOI: 10.3390/polym11101621] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 09/22/2019] [Accepted: 09/27/2019] [Indexed: 02/07/2023] Open
Abstract
In this work, we design and produce micron-sized fiber mats by blending poly(ε-caprolactone) (PCL) with small amounts of block copolymers poly(ethylene oxide)m-block-poly(ε-caprolactone)n (PEOm-b-PCLn) using electrospinning. Three different PEOm-b-PCLn block copolymers, with different molecular weights of PEO and PCL, were synthesized by ring opening polymerization of ε-caprolactone using PEO as initiator and stannous octoate as catalyst. The polymer blends were prepared by homogenous solvent mixing using dichloromethane for further electrospinning procedures. After electrospinning, it was found that the addition to PCL of the different block copolymers produced micron-fibers with smaller width, equal or higher hydrophilicity, lower Young modulus, and rougher surfaces, as compared with micron-fibers obtained only with PCL. Neural stem progenitor cells (NSPC), isolated from rat brains and grown as neurospheres, were cultured on the fibrous materials. Immunofluorescence assays showed that the NSPC are able to survive and even differentiate into astrocytes and neurons on the synthetic fibrous materials without any growth factor and using the fibers as guidance. Disassembling of the cells from the NSPC and acquisition of cell specific molecular markers and morphology progressed faster in the presence of the block copolymers, which suggests the role of the hydrophilic character and porous topology of the fiber mats.
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21
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Chen X, Lin Z, Feng Y, Tan H, Xu X, Luo J, Li J. Zwitterionic PMCP-Modified Polycaprolactone Surface for Tissue Engineering: Antifouling, Cell Adhesion Promotion, and Osteogenic Differentiation Properties. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1903784. [PMID: 31448570 DOI: 10.1002/smll.201903784] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 08/11/2019] [Indexed: 06/10/2023]
Abstract
Biodegradable polycaprolactone (PCL) has been widely applied as a scaffold material in tissue engineering. However, the PCL surface is hydrophobic and adsorbs nonspecific proteins. Some traditional antifouling modifications using hydrophilic moieties have been successful but inhibit cell adhesion, which is not ideal for tissue engineering. The PCL surface is modified with bioinspired zwitterionic poly[2-(methacryloyloxy)ethyl choline phosphate] (PMCP) via surface-initiated atom transfer radical polymerization to improve cell adhesion through the unique interaction between choline phosphate (CP, on PMCP) and phosphate choline (PC, on cell membranes). The hydrophilicity of the PCL surface is significantly enhanced after surface modification. The PCL-PMCP surface reduces nonspecific protein adsorption (e.g., up to 91.7% for bovine serum albumin) due to the zwitterionic property of PMCP. The adhesion and proliferation of bone marrow mesenchymal stem cells on the modified surface is remarkably improved, and osteogenic differentiation signs are detected, even without adding any osteogenesis-inducing supplements. Moreover, the PCL-PMCP films are more stable at the early stage of degradation. Therefore, the PMCP-functionalized PCL surface promotes cell adhesion and osteogenic differentiation, with an antifouling background, and exhibits great potential in tissue engineering.
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Affiliation(s)
- Xingyu Chen
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
- College of Medicine, Southwest Jiaotong University, Chengdu, 610003, P. R. China
| | - Zaifu Lin
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Ying Feng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Hong Tan
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Xinyuan Xu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Jun Luo
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Jianshu Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
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22
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Gupta D, Singh AK, Kar N, Dravid A, Bellare J. Modelling and optimization of NaOH-etched 3-D printed PCL for enhanced cellular attachment and growth with minimal loss of mechanical strength. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 98:602-611. [DOI: 10.1016/j.msec.2018.12.084] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Revised: 11/19/2018] [Accepted: 12/25/2018] [Indexed: 12/22/2022]
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23
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Past, Present, and Future of Regeneration Therapy in Oral and Periodontal Tissue: A Review. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9061046] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Chronic periodontitis is the most common disease which induces oral tissue destruction. The goal of periodontal treatment is to reduce inflammation and regenerate the defects. As the structure of periodontium is composed of four types of different tissue (cementum, alveolar bone periodontal ligament, and gingiva), the regeneration should allow different cell proliferation in the separated spaces. Guided tissue regeneration (GTR) and guided bone regeneration (GBR) were introduced to prevent epithelial growth into the alveolar bone space. In the past, non-absorbable membranes with basic functions such as space maintenance were used with bone graft materials. Due to several limitations of the non-absorbable membranes, membranes of the second and third generation equipped with controlled absorbability, and a functional layer releasing growth factors or antimicrobials were introduced. Moreover, tissue engineering using biomaterials enabled faster and more stable tissue regeneration. The scaffold with three-dimensional structures manufactured by computer-aided design and manufacturing (CAD/CAM) showed high biocompatibility, and promoted cell infiltration and revascularization. In the future, using the cell sheath, pre-vascularizing and bioprinting techniques will be applied to the membrane to mimic the original tissue itself. The aim of the review was not only to understand the past and the present trends of GTR and GBR, but also to be used as a guide for a proper future of regeneration therapy in the oral region.
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24
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Zhang L, Yang G, Johnson BN, Jia X. Three-dimensional (3D) printed scaffold and material selection for bone repair. Acta Biomater 2019; 84:16-33. [PMID: 30481607 DOI: 10.1016/j.actbio.2018.11.039] [Citation(s) in RCA: 369] [Impact Index Per Article: 73.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 10/06/2018] [Accepted: 11/23/2018] [Indexed: 12/15/2022]
Abstract
Critical-sized bone defect repair remains a substantial challenge in clinical settings and requires bone grafts or bone substitute materials. However, existing biomaterials often do not meet the clinical requirements of structural support, osteoinductive property, and controllable biodegradability. To treat large-scale bone defects, the development of three-dimensional (3D) porous scaffolds has received considerable focus within bone engineering. A variety of biomaterials and manufacturing methods, including 3D printing, have emerged to fabricate patient-specific bioactive scaffolds that possess controlled micro-architectures for bridging bone defects in complex configurations. During the last decade, with the development of the 3D printing industry, a large number of tissue-engineered scaffolds have been created for preclinical and clinical applications using novel materials and innovative technologies. Thus, this review provides a brief overview of current progress in existing biomaterials and tissue engineering scaffolds prepared by 3D printing technologies, with an emphasis on the material selection, scaffold design optimization, and their preclinical and clinical applications in the repair of critical-sized bone defects. Furthermore, it will elaborate on the current limitations and potential future prospects of 3D printing technology. STATEMENT OF SIGNIFICANCE: 3D printing has emerged as a critical fabrication process for bone engineering due to its ability to control bulk geometry and internal structure of tissue scaffolds. The advancement of bioprinting methods and compatible ink materials for bone engineering have been a major focus to develop optimal 3D scaffolds for bone defect repair. Achieving a successful balance of cellular function, cellular viability, and mechanical integrity under load-bearing conditions is critical. Hybridization of natural and synthetic polymer-based materials is a promising approach to create novel tissue engineered scaffolds that combines the advantages of both materials and meets various requirements, including biological activity, mechanical strength, easy fabrication and controllable degradation. 3D printing is linked to the future of bone grafts to create on-demand patient-specific scaffolds.
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Affiliation(s)
- Lei Zhang
- Department of Orthopaedics, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325200, China
| | - Guojing Yang
- Department of Orthopaedics, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325200, China
| | - Blake N Johnson
- Department of Industrial and Systems Engineering, Virginia Tech, Blacksburg, VA 24061, USA
| | - Xiaofeng Jia
- Department of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Department of Orthopedics, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
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25
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Norouzi MR, Ghasemi-Mobarakeh L, Gharibi H, Meamar R, Ajalloueian F, Chronakis IS. Surface modification of poly (ethylene terephthalate) fabric by soy protein isolate hydrogel for wound dressing application. INT J POLYM MATER PO 2018. [DOI: 10.1080/00914037.2018.1493684] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
| | | | - Hamidreza Gharibi
- Department of Chemistry, Isfahan University of Technology, Isfahan, Iran
| | - Rokhsareh Meamar
- Isfahan Clinical Toxicology Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Fatemeh Ajalloueian
- Research Group for Nano-Bio Science, National Food Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Ioannis S. Chronakis
- Research Group for Nano-Bio Science, National Food Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
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26
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Kim BS, Yang SS, Kim CS. Incorporation of BMP-2 nanoparticles on the surface of a 3D-printed hydroxyapatite scaffold using an ε-polycaprolactone polymer emulsion coating method for bone tissue engineering. Colloids Surf B Biointerfaces 2018; 170:421-429. [PMID: 29957531 DOI: 10.1016/j.colsurfb.2018.06.043] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 05/31/2018] [Accepted: 06/19/2018] [Indexed: 01/12/2023]
Abstract
Hydroxyapatite (HAp)-based three-dimensional (3D) scaffolding is an excellent method for the fabrication of complex-shaped scaffolds to reconstruct bone defects. This study aimed at improving the osteoinductivity and compressive strength of the HAp-based 3D scaffold for bone regeneration. Bone morphogenetic protein-2-loaded nanoparticles (BMP-2/NPs) were prepared by a double emulsion-solvent evaporation method and incorporated onto the surface of 3D scaffolds using ε-polycaprolactone (PCL) and NPs emulsion solution. The surface morphology of the scaffold was characterized using scanning electron microscopy and its biocompatibility and osteogenic effects evaluated in vitro using human mesenchymal stem cells. The in vivo bone regeneration efficiency was determined using a rabbit calvarial bone defect model. We obtained 3D HAp scaffolds with NPs using PCL coating process. BMP-2/NPs were uniformly distributed on the scaffold surface and BMP-2 was gradually released. Furthermore, PCL coating improved the compressive strength of the scaffold. The cell proliferation, adhesion, and osteogenic differentiation properties were improved with PCL_BMP-2/NPs coated scaffold. In vivo experiments showed that the formation of new bone was significantly higher in the PCL_BMP-2/NPs group than in the uncoated scaffold-implanted group. The coating method using PCL and NPs emulsion solutions was useful not only to incorporate BMP-2/NPs onto the surface of the scaffold, but also to improve the compressive strength, which enhanced bone regeneration.
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Affiliation(s)
- Beom-Su Kim
- Carbon Nano Convergence Technology Center for Next Generation Engineers (CNN), Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea
| | - Sun-Sik Yang
- Department of Dentistry, Oral and Maxillofacial, Wonkwang University, Iksan, 570-749, Republic of Korea
| | - Cheol Sang Kim
- Carbon Nano Convergence Technology Center for Next Generation Engineers (CNN), Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea; Department of Bionanosystem Engineering, Graduate School, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea; Division of Mechanical Design Engineering, Chonbuk National University, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea.
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27
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Giol ED, Van Vlierberghe S, Unger RE, Schaubroeck D, Ottevaere H, Thienpont H, Kirkpatrick CJ, Dubruel P. Endothelialization and Anticoagulation Potential of Surface-Modified PET Intended for Vascular Applications. Macromol Biosci 2018; 18:e1800125. [DOI: 10.1002/mabi.201800125] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 05/07/2018] [Indexed: 01/17/2023]
Affiliation(s)
- Elena Diana Giol
- Polymer Chemistry and Biomaterials Research (PBM) Group; Centre of Macromolecular Chemistry; Ghent University; Krijgslaan 281, S4-bis B-9000 Belgium
| | - Sandra Van Vlierberghe
- Polymer Chemistry and Biomaterials Research (PBM) Group; Centre of Macromolecular Chemistry; Ghent University; Krijgslaan 281, S4-bis B-9000 Belgium
- Brussels Photonics (B-PHOT); Vrije Universiteit Brussel; Pleinlaan 2 B-1050 Belgium
| | - Ronald E. Unger
- REPAIR LAB; University Medical Center of the Johannes Gutenberg University Mainz; Langenbeckstraat 1 55131 Germany
| | - David Schaubroeck
- Centre of Microsystems Technology (CMST); imec and Ghent University; Technologiepark-Zwijnaarde15 B-9052 Belgium
| | - Heidi Ottevaere
- Brussels Photonics (B-PHOT); Vrije Universiteit Brussel; Pleinlaan 2 B-1050 Belgium
| | - Hugo Thienpont
- Brussels Photonics (B-PHOT); Vrije Universiteit Brussel; Pleinlaan 2 B-1050 Belgium
| | - Charles James Kirkpatrick
- REPAIR LAB; University Medical Center of the Johannes Gutenberg University Mainz; Langenbeckstraat 1 55131 Germany
| | - Peter Dubruel
- Polymer Chemistry and Biomaterials Research (PBM) Group; Centre of Macromolecular Chemistry; Ghent University; Krijgslaan 281, S4-bis B-9000 Belgium
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28
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Tan H, Tu Z, Jia H, Gou X, Ngai T. Hierarchical Porous Protein Scaffold Templated from High Internal Phase Emulsion Costabilized by Gelatin and Gelatin Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:4820-4829. [PMID: 29631405 DOI: 10.1021/acs.langmuir.7b04047] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Recently, three-dimensional (3D) scaffolds produced using poly-Pickering high internal phase emulsions (polyHIPEs) technology are particularly attractive in biomedical application. However, until now the most investigated polyHIPEs are hydrophobic composites originating from synthetic polymers. Here we present an investigation of a hierarchical porous protein scaffold templated from oil-in-water (O/W) HIPEs costabilized by fully natural materials, gelatin, and gelatin nanoparticles. Fairly monodispersed gelatin nanoparticles were first synthesized through a two-step desolvation method, and then they were used as emulsifiers together with gelatin to fabricate stable HIPEs with adjustable droplet size distribution and rheology. Monolithic scaffolds were formed by cross-linking the HIPEs with polymers as low as 2.5 wt % in the continuous phase, which appropriately presented a general high porosity and had an interconnected porous morphology with smooth pore walls and textured structures. Furthermore, the scaffolds were degradable and showed reasonably good biocompatibility; L929 cells could adhere to the surface of the materials and exhibited intensive growth and well-spread morphology. This hierarchical porous protein scaffold could, therefore, have important application as a 3D scaffold that offers enhanced cell adhesion and functionality.
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Affiliation(s)
- Huan Tan
- Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics , Chengdu University , Chengdu 610052 , P. R. China
| | - Zhao Tu
- Bazhong Hospital of Traditional Chinese Medicine, Bazhong 636000 , P. R. China
| | - Hongqian Jia
- Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics , Chengdu University , Chengdu 610052 , P. R. China
| | - Xiaojun Gou
- Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics , Chengdu University , Chengdu 610052 , P. R. China
| | - To Ngai
- Department of Chemistry , The Chinese University of Hong Kong , Shatin , Hong Kong
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Kang YG, Wei J, Shin JW, Wu YR, Su J, Park YS, Shin JW. Enhanced biocompatibility and osteogenic potential of mesoporous magnesium silicate/polycaprolactone/wheat protein composite scaffolds. Int J Nanomedicine 2018; 13:1107-1117. [PMID: 29520139 PMCID: PMC5833793 DOI: 10.2147/ijn.s157921] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Successful bone tissue engineering using scaffolds is primarily dependent on the properties of the scaffold, including biocompatibility, highly interconnected porosity, and mechanical integrity. METHODS In this study, we propose new composite scaffolds consisting of mesoporous magnesium silicate (m_MS), polycaprolactone (PCL), and wheat protein (WP) manufactured by a rapid prototyping technique to provide a micro/macro porous structure. Experimental groups were set based on the component ratio: (1) WP0% (m_MS:PCL:WP =30:70:0 weight per weight; w/w); (2) WP15% (m_MS:PCL:WP =30:55:15 w/w); (3) WP30% (m_MS:PCL:WP =30:40:30 w/w). RESULTS Evaluation of the properties of fabricated scaffolds indicated that increasing the amount of WP improved the surface hydrophilicity and biodegradability of m_MS/PCL/WP composites, while reducing the mechanical strength. Moreover, experiments were performed to confirm the biocompatibility and osteogenic differentiation of human mesenchymal stem cells (MSCs) according to the component ratio of the scaffold. The results confirmed that the content of WP affects proliferation and osteogenic differentiation of MSCs. Based on the last day of the experiment, ie, the 14th day, the proliferation based on the amount of DNA was the best in the WP30% group, but all of the markers measured by PCR were the most expressed in the WP15% group. CONCLUSION These results suggest that the m_MS/PCL/WP composite is a promising candidate for use as a scaffold in cell-based bone regeneration.
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Affiliation(s)
- Yun Gyeong Kang
- School of Biomedical Engineering, Inje University, Gimhae, Republic of Korea
| | - Jie Wei
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai, China
| | - Ji Won Shin
- School of Biomedical Engineering, Inje University, Gimhae, Republic of Korea
| | - Yan Ru Wu
- Department of Health Science and Technology, Inje University, Gimhae, Republic of Korea
| | - Jiacan Su
- Department of Orthopaedics, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Young Shik Park
- School of Biological Science, Inje University, Gimhae, Republic of Korea
| | - Jung-Woog Shin
- School of Biomedical Engineering, Inje University, Gimhae, Republic of Korea
- Department of Health Science and Technology, Inje University, Gimhae, Republic of Korea
- Cardiovascular and Metabolic Disease Center/Institute of Aged Life Redesign/UHARC, Inje University, Gimhae, Republic of Korea
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Senapati S, Shukla R, Tripathi YB, Mahanta AK, Rana D, Maiti P. Engineered Cellular Uptake and Controlled Drug Delivery Using Two Dimensional Nanoparticle and Polymer for Cancer Treatment. Mol Pharm 2018; 15:679-694. [PMID: 29298488 DOI: 10.1021/acs.molpharmaceut.7b01119] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Two major problems in chemotherapy, poor bioavailability of hydrophobic anticancer drug and its adverse side effects causing nausea, are taken into account by developing a sustained drug release vehicle along with enhanced bioavailability using two-dimensional layered double hydroxides (LDHs) with appropriate surface charge and its subsequent embedment in polymer matrix. A model hydrophobic anticancer drug, raloxifene hydrochloride (RH), is intercalated into a series of zinc iron LDHs with varying anion charge densities using an ion exchange technique. To achieve significant sustained delivery, drug-intercalated LDH is embedded in poly(ε-caprolactone) (PCL) matrix to develop intravenous administration and to improve the therapeutic index of the drug. The cause of sustained release is visualized from the strong interaction between LDH and drug, as measured through spectroscopic techniques, like X-ray photoelectron spectroscopy, infrared, UV-visible spectroscopy, and thermal measurement (depression of melting temperature and considerable reduction in heat of fusion), using differential scanning calorimeter, followed by delayed diffusion of drug from polymer matrix. Interestingly, polymer nanohybrid exhibits long-term and excellent in vitro antitumor efficacy as opposed to pure drug or drug-intercalated LDH or only drug embedded PCL (conventional drug delivery vehicle) as evident from cell viability and cell adhesion experiments prompting a model depicting greater killing efficiency (cellular uptake) of the delivery vehicle (polymer nanohybrid) controlled by its better cell adhesion as noticed through cellular uptake after tagging of fluorescence rhodamine B separately to drug and LDH. In vivo studies also confirm the sustained release of drug in the bloodstream of albino rats using polymer nanohybrid (novel drug delivery vehicle) along with a healthy liver vis-à-vis burst release using pure drug/drug-intercalated LDHs with considerable damaged liver.
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Affiliation(s)
- Sudipta Senapati
- School of Materials Science and Technology, Indian Institute of Technology (Banaras Hindu University) , Varanasi 221 005, India
| | - Rashmi Shukla
- Department of Medicinal Chemistry, Institute of Medical Science, Banaras Hindu University , Varanasi 221 005, India
| | - Yamini Bhusan Tripathi
- Department of Medicinal Chemistry, Institute of Medical Science, Banaras Hindu University , Varanasi 221 005, India
| | - Arun Kumar Mahanta
- School of Materials Science and Technology, Indian Institute of Technology (Banaras Hindu University) , Varanasi 221 005, India
| | - Dipak Rana
- Industrial Membrane Research Institute, Department of Chemical and Biological Engineering, University of Ottawa , 161 Louis Pasteur St., Ottawa, ON KIN 6N5, Canada
| | - Pralay Maiti
- School of Materials Science and Technology, Indian Institute of Technology (Banaras Hindu University) , Varanasi 221 005, India
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Başaran İ, Oral A. Grafting of poly(ε-caprolactone) on electrospun gelatin nanofiber through surface-initiated ring-opening polymerization. INT J POLYM MATER PO 2018. [DOI: 10.1080/00914037.2017.1417287] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- İhsan Başaran
- Department of Chemistry, Biopolymer and Advanced Polymeric Materials Laboratory, Faculty of Literature and Science, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
- Science Technology Application and Research Center, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
| | - Ayhan Oral
- Department of Chemistry, Biopolymer and Advanced Polymeric Materials Laboratory, Faculty of Literature and Science, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
- Science Technology Application and Research Center, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
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Kang YG, Wei J, Kim JE, Wu YR, Lee EJ, Su J, Shin JW. Characterization and osteogenic evaluation of mesoporous magnesium–calcium silicate/polycaprolactone/polybutylene succinate composite scaffolds fabricated by rapid prototyping. RSC Adv 2018; 8:33882-33892. [PMID: 35548789 PMCID: PMC9086718 DOI: 10.1039/c8ra06281a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 09/25/2018] [Indexed: 12/28/2022] Open
Abstract
The properties of scaffolds for bone tissue engineering, including their biocompatibility, highly interconnected porosity, and mechanical integrity, are critical for promoting cell adhesion, proliferation, and osteoinduction. We used various physical and biological assays to obtain in vitro confirmation that the proposed composite scaffolds are potentially suitable for applications to bone tissue engineering. The proposed new composite scaffolds, which we fabricated by a rapid prototyping technique, were composed of mesoporous magnesium–calcium silicate (m_MCS), polycaprolactone (PCL), and polybutylene succinate (PBSu). We systematically evaluated the characteristics of the composite scaffolds, such as the hydrophilicity and bioactivity. We also investigated the proliferation and osteogenic differentiation of human mesenchymal stem cells (MSCs) scaffolded on the m_MCS/PCL/PBSu composite. Our results showed that, compared to the m_MCS/PCL scaffold, the m_MCS/PCL/PBSu scaffold has improved water absorption, in vitro degradability, biocompatibility, and bioactivity in simulated body fluid, while its mechanical strength is reduced. Moreover, the results of the cytotoxicity tests specified in ISO 10993-12 and ISO 10993-5 clearly indicate that the m_MCS/PCL scaffold is not toxic to cells. In addition, we obtained significant increases in initial cell attachment and improvements to the osteogenic MSC differentiation by replacing the m_MCS/PCL scaffold with the m_MCS/PCL/PBSu scaffold. Our results indicate that the m_MCS/PCL/PBSu scaffold achieves enhanced bioactivity, degradability, cytocompatibility, and osteogenesis. As such, this scaffold is a potentially promising candidate for use in stem cell-based bone tissue engineering. A new composite scaffold consisting of mesoporous magnesium–calcium silicate (m_MCS), polycaprolactone (PCL), and polybutylene succinate (PBSu) was manufactured by a rapid prototyping technique, for stem cell-based bone tissue engineering.![]()
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Affiliation(s)
- Yun Gyeong Kang
- School of Biomedical Engineering
- Inje University
- Gimhae
- Republic of Korea
| | - Jie Wei
- Key Laboratory for Ultrafine Materials of Ministry of Education
- East China University of Science and Technology
- Shanghai
- China
| | - Ji Eun Kim
- School of Biomedical Engineering
- Inje University
- Gimhae
- Republic of Korea
| | - Yan Ru Wu
- Department of Health Science and Technology
- Inje University
- Gimhae
- Republic of Korea
| | - Eun Jin Lee
- School of Biomedical Engineering
- Inje University
- Gimhae
- Republic of Korea
| | - Jiacan Su
- Department of Orthopaedics
- Changhai Hospital
- Second Military Medical University
- Shanghai
- China
| | - Jung-Woog Shin
- School of Biomedical Engineering
- Inje University
- Gimhae
- Republic of Korea
- Department of Health Science and Technology
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33
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Shim KS, Kim SE, Yun YP, Jeon DI, Kim HJ, Park K, Song HR. Surface immobilization of biphasic calcium phosphate nanoparticles on 3D printed poly(caprolactone) scaffolds enhances osteogenesis and bone tissue regeneration. J IND ENG CHEM 2017. [DOI: 10.1016/j.jiec.2017.06.033] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Coverdale BDM, Gough JE, Sampson WW, Hoyland JA. Use of lecithin to control fiber morphology in electrospun poly (ɛ-caprolactone) scaffolds for improved tissue engineering applications. J Biomed Mater Res A 2017; 105:2865-2874. [PMID: 28608414 PMCID: PMC5601215 DOI: 10.1002/jbm.a.36139] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 06/01/2017] [Indexed: 12/02/2022]
Abstract
We elucidate the effects of incorporating surfactants into electrospun poly (ɛ‐caprolactone) (PCL) scaffolds on network homogeneity, cellular adherence and osteogenic differentiation. Lecithin was added with a range of concentrations to PCL solutions, which were electrospun to yield functionalized scaffolds. Addition of lecithin yielded a dose‐dependent reduction in scaffold hydrophobicity, whilst reducing fiber width and hence increasing specific surface area. These changes in scaffold morphology were associated with increased cellular attachment of Saos‐2 osteoblasts 3‐h postseeding. Furthermore, cells on scaffolds showed comparable proliferation over 14 days of incubation to TCP controls. Through model‐based interpretation of image analysis combined with gravimetric estimates of porosity, lecithin is shown to reduce scaffold porosity and mean pore size. Additionally, lecithin incorporation is found to reduce fiber curvature, resulting in increased scaffold specific elastic modulus. Low concentrations of lecithin were found to induce upregulation of several genes associated with osteogenesis in primary mesenchymal stem cells. The results demonstrate that functionalization of electrospun PCL scaffolds with lecithin can increase the biocompatibility and regenerative potential of these networks for bone tissue engineering applications. © 2017 The Authors Journal of Biomedical Materials Research Part A Published by Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 2865–2874, 2017.
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Affiliation(s)
| | - Julie E Gough
- School of Materials, The University of Manchester, Manchester, M13 9PL, United Kingdom
| | - William W Sampson
- School of Materials, The University of Manchester, Manchester, M13 9PL, United Kingdom
| | - Judith A Hoyland
- The Stopford Building, School of Biological Sciences, Division of Cell Matrix and Regenerative Medicine, The University of Manchester, Manchester, M13 9TP, United Kingdom.,NIHR Manchester Musculoskeletal Biomedical Research Unit, Central Manchester NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, United Kingdom
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35
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Khampieng T, Yamassatien V, Ekabutr P, Pavasant P, Supaphol P. Protein adsorption and cell behaviors on polycaprolactone film: The effect of surface topography. ADVANCES IN POLYMER TECHNOLOGY 2017. [DOI: 10.1002/adv.21861] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Thitikan Khampieng
- Center for Research and Innovation; Faculty of Medical Technology; Mahidol University; Nakhon Pathom Thailand
- Department of Clinical Chemistry; Faculty of Medical Technology; Mahidol University; Nakhon Pathom Thailand
| | - Vipawee Yamassatien
- The Petroleum and Petrochemical College; Chulalongkorn University; Bangkok Thailand
| | - Pongpol Ekabutr
- The Petroleum and Petrochemical College; Chulalongkorn University; Bangkok Thailand
| | - Prasit Pavasant
- Department of Anatomy; Faculty of Dentistry; Chulalongkorn University; Bangkok Thailand
| | - Pitt Supaphol
- The Petroleum and Petrochemical College; Chulalongkorn University; Bangkok Thailand
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36
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37
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Tan H, Wei J, Sun G, Mu C, Lin W, Ngai T. Interconnected macroporous 3D scaffolds templated from gelatin nanoparticle-stabilized high internal phase emulsions for biomedical applications. SOFT MATTER 2017; 13:3871-3878. [PMID: 28492658 DOI: 10.1039/c7sm00706j] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Here we report on the successful preparation of open-cellular macroporous 3D scaffolds templated from gelatin nanoparticle-stabilized HIPEs with acrylamide (AM) as the monomer in the continuous phase. Tuning the gelatin nanoparticle concentration or AM content led to different porous structures with void diameters varying between 30 and 78 μm. More importantly, keeping HIPEs at room temperature to undergo a limited kinetic coarsening before polymerization could greatly improve the interconnectivity and pore size of the scaffolds, with the average diameters (approx. 118 μm) being enlarged 1.5-fold. Additionally, the scaffolds had a character of soft tissue with compressive modulus more than 150 kPa. The cell culture assay confirmed that HepG2 cells not only could adsorb on but also were grown inside the scaffolds, representing a characteristic of the good biocompatibility of the scaffolds. Our work suggests that the 3D scaffolds fabricated from gelatin nanoparticle-stabilized HIPE templates are promising culture substrates for a wide range of applications in the biomedical field.
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Affiliation(s)
- Huan Tan
- Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics, Chengdu University, Chengdu, 610052, P. R. China
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38
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Song MJ, Amirian J, Linh NTB, Lee BT. Bone morphogenetic protein-2 immobilization on porous PCL-BCP-Col composite scaffolds for bone tissue engineering. J Appl Polym Sci 2017. [DOI: 10.1002/app.45186] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Myeong-Jin Song
- Department of Regenerative Medicine; College of Medicine, Soonchunhyang University 366-1; Ssangyong-dong Cheonan-City, ChungCheongNam-Do 330-090 Republic of Korea
| | - Jhaleh Amirian
- Institute of Tissue Regeneration, Soonchunhyang University 366-1; Ssangyong-dong Cheonan-City, ChungCheongNam-Do 330-090 Republic of Korea
| | - Nguyen Thuy Ba Linh
- Institute of Tissue Regeneration, Soonchunhyang University 366-1; Ssangyong-dong Cheonan-City, ChungCheongNam-Do 330-090 Republic of Korea
| | - Byong-Taek Lee
- Department of Regenerative Medicine; College of Medicine, Soonchunhyang University 366-1; Ssangyong-dong Cheonan-City, ChungCheongNam-Do 330-090 Republic of Korea
- Institute of Tissue Regeneration, Soonchunhyang University 366-1; Ssangyong-dong Cheonan-City, ChungCheongNam-Do 330-090 Republic of Korea
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39
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Effects of 3D-Printed Polycaprolactone/β-Tricalcium Phosphate Membranes on Guided Bone Regeneration. Int J Mol Sci 2017; 18:ijms18050899. [PMID: 28441338 PMCID: PMC5454812 DOI: 10.3390/ijms18050899] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 04/17/2017] [Accepted: 04/20/2017] [Indexed: 11/25/2022] Open
Abstract
This study was conducted to compare 3D-printed polycaprolactone (PCL) and polycaprolactone/β-tricalcium phosphate (PCL/β-TCP) membranes with a conventional commercial collagen membrane in terms of their abilities to facilitate guided bone regeneration (GBR). Fabricated membranes were tested for dry and wet mechanical properties. Fibroblasts and preosteoblasts were seeded into the membranes and rates and patterns of proliferation were analyzed using a kit-8 assay and by scanning electron microscopy. Osteogenic differentiation was verified by alizarin red S and alkaline phosphatase (ALP) staining. An in vivo experiment was performed using an alveolar bone defect beagle model, in which defects in three dogs were covered with different membranes. CT and histological analyses at eight weeks after surgery revealed that 3D-printed PCL/β-TCP membranes were more effective than 3D-printed PCL, and substantially better than conventional collagen membranes in terms of biocompatibility and bone regeneration and, thus, at facilitating GBR.
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40
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Borzooeian Z, Taslim ME, Borzooeian G, Ghasemi O, Aminlari M. Activity and stability analysis of covalent conjugated lysozyme-single walled carbon nanotubes: potential biomedical and industrial applications. RSC Adv 2017. [DOI: 10.1039/c7ra07189b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Analysis of covalent conjugated lysozyme-single walled carbon nanotubes.
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Affiliation(s)
- Z. Borzooeian
- Department of Mechanical and Industrial Engineering
- College of Engineering
- Northeastern University
- Boston
- USA
| | - M. E. Taslim
- Department of Mechanical and Industrial Engineering
- College of Engineering
- Northeastern University
- Boston
- USA
| | - G. Borzooeian
- Department of Biology
- Payame Noor University of Isfahan
- Iran
| | - O. Ghasemi
- Takeda Pharmaceuticals USA Inc
- Cambridge
- USA
| | - M. Aminlari
- Department of Biochemistry
- School of Veterinary Medicine
- Shiraz University
- Shiraz
- Iran
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41
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Malviya R, Sharma PK, Dubey SK. Modification of polysaccharides: Pharmaceutical and tissue engineering applications with commercial utility (patents). MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 68:929-938. [DOI: 10.1016/j.msec.2016.06.093] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 06/08/2016] [Accepted: 06/29/2016] [Indexed: 12/25/2022]
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42
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Nhi TT, Khon HC, Hoai NTT, Bao BC, Quyen TN, Van Toi V, Hiep NT. Fabrication of electrospun polycaprolactone coated withchitosan-silver nanoparticles membranes for wound dressing applications. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:156. [PMID: 27620739 DOI: 10.1007/s10856-016-5768-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 08/24/2016] [Indexed: 06/06/2023]
Abstract
In this study, electrospun polycaprolactone membrane coated with chitosan-silver nanoparticles (CsAg), electrospun polycaprolactone/chitosan/Ag nanoparticles, was fabricated by immersing the plasma-treated electrospun polycaprolactone membrane in the CsAg gel. The plasma modification of electrospun polycaprolactone membrane prior to CsAg coating was tested by methylene blue stain and scanning electron microscope. The presence of silver and chitosan on the plasma-treated electrospun polycaprolactone membrane was confirmed by energy-dispersive X-ray spectroscopy and FT-IR spectrum. Scanning electron microscope observation was employed to observe the morphology of the membranes. The release of Ag ions from electrospun polycaprolactone/chitosan/Ag nanoparticles membrane was tested using atomic absorption spectrometry. Electrospun polycaprolactone/chitosan/Ag nanoparticles membrane inherited advantages from both CsAg gel and electrospun polycaprolactone membrane such as: increasing biocompatibility, mechanical strength, and antibacterial activity against both Gram-negative and Gram-positive bacteria. Thus, this investigation introduces a highly potential membrane that can increase the efficacy of the wound dressing process.
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Affiliation(s)
- Tra Thanh Nhi
- Tissue Engineering and Regenerative Medicine Group, Department of Biomedical Engineering, International University, Vietnam National University-Ho Chi Minh City (VNU-HCM), HCMC, 700000, Vietnam
| | - Huynh Chan Khon
- Tissue Engineering and Regenerative Medicine Group, Department of Biomedical Engineering, International University, Vietnam National University-Ho Chi Minh City (VNU-HCM), HCMC, 700000, Vietnam
| | - Nguyen Thi Thu Hoai
- School of Biotechnology, International University, Vietnam National University-Ho Chi Minh City (VNU-HCM), HCMC, 700000, Vietnam
| | - Bui Chi Bao
- The Center for Molecular Biomedicine, University of Medicine and Pharmacy, HCMC, 700000, Vietnam
| | - Tran Ngoc Quyen
- Department - Materiasl and Pharmaceutical chemistry, Institute of Applied Materials Science-Vietnam Academy of Science and Technology, VAST, HCMC, 700000, Vietnam
| | - Vo Van Toi
- Tissue Engineering and Regenerative Medicine Group, Department of Biomedical Engineering, International University, Vietnam National University-Ho Chi Minh City (VNU-HCM), HCMC, 700000, Vietnam
| | - Nguyen Thi Hiep
- Tissue Engineering and Regenerative Medicine Group, Department of Biomedical Engineering, International University, Vietnam National University-Ho Chi Minh City (VNU-HCM), HCMC, 700000, Vietnam.
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Zhao X, Liu H, Hu Y, Huang J, Zhang S, Ja F. A novel gelatin-AgNPs coating preparing method for fabrication of antibacterial and no inflammation inducible coatings on PHBV. REACT FUNCT POLYM 2016. [DOI: 10.1016/j.reactfunctpolym.2016.07.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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44
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Manso M, Valsesia A, Ceccone G, Rossi F. Activation of PCL Surface by Ion Beam Treatment to Enhance Protein Adsorption. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911504045174] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Polymer substrates with tailored surface properties are increasingly desired in tissue engineering studies. In this work a procedure was developed to improve the use of a polycaprolactone (PCL) films for these applications. Ion beam treatments of PCL films activated the surface by different modification mechanisms. The PCL activation conditions were studied using several techniques to evaluate the modifications of the films surface. The results obtained from FTIR, X-ray photoelectron spectroscopy and atomic force microscopy indicated that a gradual modification of the composition and microstructure of the films was induced by the process. The modified surfaces induced shifts in Zeta potential vs pH curves and increased the polar component of the surface free energy. The protein adsorption characteristics of the PCL films were monitored by microgravimetric techniques confirming that the ion beam treatment was able to trigger bovine serum albumin adsorption onto the treated PCL surface.
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Affiliation(s)
- M. Manso
- Institute for Health and Consumer Protection, Joint Research Centre TP-203, 21020 Ispra (Va) Italy, ,
| | - A. Valsesia
- Institute for Health and Consumer Protection, Joint Research Centre TP-203, 21020 Ispra (Va) Italy
| | - G. Ceccone
- Institute for Health and Consumer Protection, Joint Research Centre TP-203, 21020 Ispra (Va) Italy
| | - F. Rossi
- Institute for Health and Consumer Protection, Joint Research Centre TP-203, 21020 Ispra (Va) Italy,
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Mei N, Chen G, Zhou P, Chen X, Shao ZZ, Pan LF, Wu CG. Biocompatibility of Poly(ε-caprolactone) Scaffold Modified by Chitosan—The Fibroblasts Proliferation in vitro. J Biomater Appl 2016; 19:323-39. [PMID: 15788428 DOI: 10.1177/0885328205048630] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this study, the surface of poly("-caprolactone) (PCL) scaffold was modified by chitosan (CS) in order to enhance its cell affinity and biocompatibility. It is demonstrated by scanning electronic microscopy (SEM) that when 0.5-2.0 wt% chitosan solutions are used to modify the PCL scaffold, the amount of adhesion of the fibroblasts on the chitosan-modified PCL scaffolds dramatically increase when compared to the control after 7 days cell culture. The results indicate that the chitosan-modified PCL scaffolds are more favorable for cell proliferation by improving the scaffold biocompatibility. The improvement may be helpful for the extensive applications of PCL scaffold in heart valve and blood vessel tissue engineering.
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Affiliation(s)
- Na Mei
- The Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, Macromolecular Science Department, Fudan University, Shanghai 200433, P.R. China
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3D-Printed Scaffolds and Biomaterials: Review of Alveolar Bone Augmentation and Periodontal Regeneration Applications. Int J Dent 2016; 2016:1239842. [PMID: 27366149 PMCID: PMC4913015 DOI: 10.1155/2016/1239842] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 04/17/2016] [Accepted: 05/10/2016] [Indexed: 12/23/2022] Open
Abstract
To ensure a successful dental implant therapy, the presence of adequate vertical and horizontal alveolar bone is fundamental. However, an insufficient amount of alveolar ridge in both dimensions is often encountered in dental practice due to the consequences of oral diseases and tooth loss. Although postextraction socket preservation has been adopted to lessen the need for such invasive approaches, it utilizes bone grafting materials, which have limitations that could negatively affect the quality of bone formation. To overcome the drawbacks of routinely employed grafting materials, bone graft substitutes such as 3D scaffolds have been recently investigated in the dental field. In this review, we highlight different biomaterials suitable for 3D scaffold fabrication, with a focus on “3D-printed” ones as bone graft substitutes that might be convenient for various applications related to implant therapy. We also briefly discuss their possible adoption for periodontal regeneration.
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Scislowska-Czarnecka A, Pamula E, Tlalka A, Kolaczkowska E. Effects of aliphatic polyesters on activation of the immune system: studies on macrophages. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2016; 23:715-38. [PMID: 21375810 DOI: 10.1163/092050611x559421] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
There is a constant search for biodegradable polymers with biocompatible characteristics. However, the reported materials are rarely tested for their immunostimulatory properties, which is an important issue as immune cells activated by the polymers might cause their rejection and lead to further injury to the host tissues. Therefore, the aim of the present study was to determine if biodegradable polymers are able to activate RAW 264.7 macrophages. Aliphatic polyesters, poly(L-lactide) (PLLA), poly(L-lactide-co-trimethylene carbonate) (PLTMC), poly(glycolide-co-L-lactide) (PGLA), poly(glycolide-co-L-lactide-co-ε-caprolactone) (PGLCap) and poly(glycolide-co-ε-caprolactone) (PGCap), processed into foils by slip-casting, were characterized in terms of their structure ((1)H-NMR, GPC, DSC) and surface properties (chemical composition, water contact angle, surface free energy, topography and roughness). RAW 264.7 cells were cultured on the materials for 3 or 5 days and their adherence, numbers of apoptotic/necrotic cells, as well as production of several cytokines/chemokines and other inflammation-related molecules (matrix metalloproteinases, nitric oxide) was evaluated. The study demonstrated that PLLA and PGLA did not influence macrophage activation and survival. In contrast, PLTMC, PGLCap and PGCap significantly decreased macrophage adherence, increased ratio of apoptosis and up-regulated synthesis/release of numerous inflammatory mediators. Thus, the latter materials might initiate an undesired inflammatory reaction. The above effects of the polymers were attributed to their high hydrophobicity and low polarity due to the presence of ε-caproyl blocks (PGLCap and PGCap), and/or high flexibility and susceptibility to mechanical deformation due to low glasstransition temperature (PLTMC, PGLCap and PGCap). In conclusion, while PLLA and PGLA do not affect macrophage functioning, the other materials (PLTMC, PGLCap, PGCap) up-regulate macrophage activity.
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Pai B G, Kulkarni AV, Jain S. Study of smart antibacterial PCL-x
Fe3
O4
thin films using mouse NIH-3T3 fibroblast cells in vitro. J Biomed Mater Res B Appl Biomater 2016; 105:795-804. [DOI: 10.1002/jbm.b.33615] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Revised: 12/17/2015] [Accepted: 12/27/2015] [Indexed: 01/13/2023]
Affiliation(s)
- Ganesh Pai B
- Centre for BioSystems Science and Engineering; Indian Institute of Science; Bangalore-560012 Karnataka India
- BARC Training School; Bhabha Atomic Research Centre; Trombay Mumbai 400085 India
| | - Ajay V. Kulkarni
- Department of Biotechnology; M. S. Ramaiah Institute of Technology; Bangalore 560054 Karnataka India
| | - Shilpee Jain
- Centre for BioSystems Science and Engineering; Indian Institute of Science; Bangalore-560012 Karnataka India
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Jung JW, Lee H, Hong JM, Park JH, Shim JH, Choi TH, Cho DW. A new method of fabricating a blend scaffold using an indirect three-dimensional printing technique. Biofabrication 2015; 7:045003. [PMID: 26525821 DOI: 10.1088/1758-5090/7/4/045003] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Due to its simplicity and effectiveness, the physical blending of polymers is considered to be a practical strategy for developing a versatile scaffold having desirable mechanical and biochemical properties. In the present work, an indirect three-dimensional (i3D) printing technique was proposed to fabricate a 3D free-form scaffold using a blend of immiscible materials, such as polycaprolactone (PCL) and gelatin. The i3D printing technique includes 3D printing of a mold and a sacrificial molding process. PCL/chloroform and gelatin/water were physically mixed to prepare the blend solution, which was subsequently injected into the cavity of a 3D printed mold. After solvent removal and gelatin cross-linking, the mold was dissolved to obtain a PCL-gelatin (PG) scaffold, with a specific 3D structure. Scanning electron microscopy and Fourier transform infrared spectroscopy analysis indicated that PCL masses and gelatin fibers in the PG scaffold homogenously coexisted without chemical bonding. Compression tests confirmed that gelatin incorporation into the PCL enhanced its mechanical flexibility and softness, to the point of being suitable for soft-tissue engineering, as opposed to pure PCL. Human adipose-derived stem cells, cultured on a PG scaffold, exhibited enhanced in vitro chondrogenic differentiation and tissue formation, compared with those on a PCL scaffold. The i3D printing technique can be used to blend a variety of materials, facilitating 3D scaffold fabrication for specific tissue regeneration. Furthermore, this convenient and versatile technique may lead to wider application of 3D printing in tissue engineering.
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Affiliation(s)
- Jin Woo Jung
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-dong, Nam-gu, Pohang, Gyungbuk 790-784, Korea
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Xiong GM, Yuan S, Wang JK, Do AT, Tan NS, Yeo KS, Choong C. Imparting electroactivity to polycaprolactone fibers with heparin-doped polypyrrole: Modulation of hemocompatibility and inflammatory responses. Acta Biomater 2015; 23:240-249. [PMID: 25983317 DOI: 10.1016/j.actbio.2015.05.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 04/14/2015] [Accepted: 05/07/2015] [Indexed: 10/23/2022]
Abstract
Hemocompatibility, anti-inflammation and anti-thrombogenicity of acellular synthetic vascular grafts remains a challenge in biomaterials design. Using electrospun polycaprolactone (PCL) fibers as a template, a coating of polypyrrole (PPy) was successfully polymerized onto the fiber surface. The fibers coated with heparin-doped PPy (PPy-HEP) demonstrated better electroactivity, lower surface resistivity (9-10-fold) and better anti-coagulation response (non-observable plasma recalcification after 30min vs. recalcification at 8-9min) as compared to fibers coated with pristine PPy. Red blood cell compatibility, measured by% hemolysis, was greatly improved on PPy-HEP-coated PCL in comparison to uncoated PCL (3.9±2.1% vs. 22.1±4.1%). PPy-HEP-coated PCL fibers also exhibited higher stiffness values (6.8±0.9MPa vs. 4.2±0.8MPa) as compared to PCL fibers, but similar tensile strengths. It was also observed that the application of a low alternating current led to a 4-fold reduction of platelet activation (as quantitated by CD62p expression) for the PPy-HEP-coated fibers as compared to non-stimulated conditions. In parallel, a reduction in the leukocyte adhesion to both pristine PPy-coated and PPy-HEP-coated fibers was observable with AC stimulation. Overall, a new strategy involving the use of hemocompatible conducting polymers and electrical stimulation to control thrombogenicity and inflammatory responses for synthetic vascular graft designs was demonstrated.
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