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Han LH, Conrad B, Chung MT, Deveza L, Jiang X, Wang A, Butte MJ, Longaker MT, Wan D, Yang F. Winner of the Young Investigator Award of the Society for Biomaterials at the 10th World Biomaterials Congress, May 17-22, 2016, Montreal QC, Canada: Microribbon-based hydrogels accelerate stem cell-based bone regeneration in a mouse critical-size cranial defect model. J Biomed Mater Res A 2016; 104:1321-31. [PMID: 26991141 DOI: 10.1002/jbm.a.35715] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Revised: 02/23/2016] [Accepted: 03/09/2016] [Indexed: 12/31/2022]
Abstract
Stem cell-based therapies hold great promise for enhancing tissue regeneration. However, the majority of cells die shortly after transplantation, which greatly diminishes the efficacy of stem cell-based therapies. Poor cell engraftment and survival remain a major bottleneck to fully exploiting the power of stem cells for regenerative medicine. Biomaterials such as hydrogels can serve as artificial matrices to protect cells during delivery and guide desirable cell fates. However, conventional hydrogels often lack macroporosity, which restricts cell proliferation and delays matrix deposition. Here we report the use of injectable, macroporous microribbon (μRB) hydrogels as stem cell carriers for bone repair, which supports direct cell encapsulation into a macroporous scaffold with rapid spreading. When transplanted in a critical-sized, mouse cranial defect model, μRB-based hydrogels significantly enhanced the survival of transplanted adipose-derived stromal cells (ADSCs) (81%) and enabled up to three-fold cell proliferation after 7 days. In contrast, conventional hydrogels only led to 27% cell survival, which continued to decrease over time. MicroCT imaging showed μRBs enhanced and accelerated mineralized bone repair compared to hydrogels (61% vs. 34% by week 6), and stem cells were required for bone repair to occur. These results suggest that paracrine signaling of transplanted stem cells are responsible for the observed bone repair, and enhancing cell survival and proliferation using μRBs further promoted the paracrine-signaling effects of ADSCs for stimulating endogenous bone repair. We envision μRB-based scaffolds can be broadly useful as a novel scaffold for enhancing stem cell survival and regeneration of other tissue types. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 1321-1331, 2016.
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Affiliation(s)
- Li-Hsin Han
- Department of Orthopaedic Surgery, Stanford University School of Medicine, 300 Pasteur Dr, Edward Building Room 114, Stanford, California 94305
| | - Bogdan Conrad
- Program of Stem Cell Biology and Regenerative Medicine, Stanford University, 300 Pasteur Dr, Edward Building Room 114, Stanford, California 94305
| | - Michael T Chung
- Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, 257 Campus Dr, Hagey Building Room GK106, Stanford, California 94305
| | - Lorenzo Deveza
- Department of Orthopaedic Surgery, Stanford University School of Medicine, 300 Pasteur Dr, Edward Building Room 114, Stanford, California 94305
| | - Xinyi Jiang
- Department of Orthopaedic Surgery, Stanford University School of Medicine, 300 Pasteur Dr, Edward Building Room 114, Stanford, California 94305
| | - Andrew Wang
- Department of Pediatrics, Stanford University School of Medicine, 300 Pasteur Dr, Grant Building Room H307A, Stanford, California 94305
| | - Manish J Butte
- Department of Pediatrics, Stanford University School of Medicine, 300 Pasteur Dr, Grant Building Room H307A, Stanford, California 94305
| | - Michael T Longaker
- Division of Plastic and Reconstructive Surgery, Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, 257 Campus Dr, Hagey Building Room GK106, Stanford, California 94305
| | - Derrick Wan
- Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, 257 Campus Dr, Hagey Building Room GK106, Stanford, California 94305
| | - Fan Yang
- Department of Orthopaedic Surgery, Stanford University School of Medicine, 300 Pasteur Dr, Edward Building Room 114, Stanford, California 94305.,Department of Bioengineering, Stanford University, 300 Pasteur Dr, Edward Building Room 114, Stanford, California 94305
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Puppi D, Migone C, Grassi L, Pirosa A, Maisetta G, Batoni G, Chiellini F. Integrated three-dimensional fiber/hydrogel biphasic scaffolds for periodontal bone tissue engineering. POLYM INT 2016. [DOI: 10.1002/pi.5101] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Dario Puppi
- BIOLab Research Group, Department of Chemistry and Industrial Chemistry; University of Pisa, UdR INSTM Pisa; Pisa Italy
| | - Chiara Migone
- BIOLab Research Group, Department of Chemistry and Industrial Chemistry; University of Pisa, UdR INSTM Pisa; Pisa Italy
| | - Lucia Grassi
- BIOLab Research Group, Department of Chemistry and Industrial Chemistry; University of Pisa, UdR INSTM Pisa; Pisa Italy
| | - Alessandro Pirosa
- BIOLab Research Group, Department of Chemistry and Industrial Chemistry; University of Pisa, UdR INSTM Pisa; Pisa Italy
| | - Giuseppantonio Maisetta
- Department of Translational Research and New Technologies in Medicine and Surgery; University of Pisa; Pisa Italy
| | - Giovanna Batoni
- Department of Translational Research and New Technologies in Medicine and Surgery; University of Pisa; Pisa Italy
| | - Federica Chiellini
- BIOLab Research Group, Department of Chemistry and Industrial Chemistry; University of Pisa, UdR INSTM Pisa; Pisa Italy
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103
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Kheradmandi M, Vasheghani-Farahani E, Ghiaseddin A, Ganji F. Skeletal muscle regeneration via engineered tissue culture over electrospun nanofibrous chitosan/PVA scaffold. J Biomed Mater Res A 2016; 104:1720-7. [DOI: 10.1002/jbm.a.35702] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 02/23/2016] [Accepted: 03/01/2016] [Indexed: 01/04/2023]
Affiliation(s)
- Mahsa Kheradmandi
- Biomedical Engineering Division; Chemical Engineering Faculty, Tarbiat Modares University; P.O. Box: 14115-143 Tehran Iran
| | - Ebrahim Vasheghani-Farahani
- Biomedical Engineering Division; Chemical Engineering Faculty, Tarbiat Modares University; P.O. Box: 14115-143 Tehran Iran
| | | | - Fariba Ganji
- Biomedical Engineering Division; Chemical Engineering Faculty, Tarbiat Modares University; P.O. Box: 14115-143 Tehran Iran
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Nakata H, Kuroda S, Tachikawa N, Okada E, Akatsuka M, Kasugai S, Kondo H. Histological and micro-computed tomographic observations after maxillary sinus augmentation with porous hydroxyapatite alloplasts: a clinical case series. SPRINGERPLUS 2016; 5:260. [PMID: 27006869 PMCID: PMC4775718 DOI: 10.1186/s40064-016-1885-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 02/16/2016] [Indexed: 11/25/2022]
Abstract
Background It is important to visualize the phenomenon which occurs in actual clinical cases to decide the timing of implant placement subsequently after sinus graft. Although several clinical cases of bone augmentation using xenograft have been evaluated, the number of those reports which have described bone remodeling by alloplasty are not sufficient. Findings In the present report, to investigate bone remodeling histologically after maxillary sinus augmentation with porous hydroxyapatite alloplast, bone cores from the sinus floor of three female nonsmoking patients (aged 64–73 years) were collected 6 months after sinus lift surgery, embedded in methyl methacrylate resin, and prepared by conventional methods. Bone architecture and graft residues were evaluated by micro-computed tomography of the same specimens. Hematoxylin–eosin and Villanueva–Goldner staining revealed mature osteoblasts and multinucleated osteoclasts on the grafted sinus floor and surface of residual hydroxyapatite particles. The particulate interspace was partially filled with osteoid and calcified tissue and showed active vascularization. Conclusion The results suggested that bone regeneration and angiogenesis within and between porous hydroxyapatite particles were sufficiently found after 6 month histologically in the grafted sinus floor. Electronic supplementary material The online version of this article (doi:10.1186/s40064-016-1885-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hidemi Nakata
- Department of Prosthodontics and Oral Implantology, Dental Hospital, Iwate Medical University, 19-1 Uchimaru, Morioka, Iwate Japan ; Department Oral Implantology and Regenerative Dental Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Bunkyo-ku, Yushima, Tokyo, 113-8510 Japan
| | - Shinji Kuroda
- Department Oral Implantology and Regenerative Dental Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Bunkyo-ku, Yushima, Tokyo, 113-8510 Japan
| | - Noriko Tachikawa
- Department Oral Implantology and Regenerative Dental Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Bunkyo-ku, Yushima, Tokyo, 113-8510 Japan
| | - Emi Okada
- Department Oral Implantology and Regenerative Dental Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Bunkyo-ku, Yushima, Tokyo, 113-8510 Japan
| | - Maho Akatsuka
- Department Oral Implantology and Regenerative Dental Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Bunkyo-ku, Yushima, Tokyo, 113-8510 Japan
| | - Shohei Kasugai
- Department Oral Implantology and Regenerative Dental Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Bunkyo-ku, Yushima, Tokyo, 113-8510 Japan
| | - Hisatomo Kondo
- Department of Prosthodontics and Oral Implantology, Dental Hospital, Iwate Medical University, 19-1 Uchimaru, Morioka, Iwate Japan ; Department Oral Implantology and Regenerative Dental Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Bunkyo-ku, Yushima, Tokyo, 113-8510 Japan
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Curry AS, Pensa NW, Barlow AM, Bellis SL. Taking cues from the extracellular matrix to design bone-mimetic regenerative scaffolds. Matrix Biol 2016; 52-54:397-412. [PMID: 26940231 DOI: 10.1016/j.matbio.2016.02.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 02/25/2016] [Accepted: 02/25/2016] [Indexed: 12/30/2022]
Abstract
There is an ongoing need for effective materials that can replace autologous bone grafts in the clinical treatment of bone injuries and deficiencies. In recent years, research efforts have shifted away from a focus on inert biomaterials to favor scaffolds that mimic the biochemistry and structure of the native bone extracellular matrix (ECM). The expectation is that such scaffolds will integrate with host tissue and actively promote osseous healing. To further enhance the osteoinductivity of bone graft substitutes, ECM-mimetic scaffolds are being engineered with a range of growth factors (GFs). The technologies used to generate GF-modified scaffolds are often inspired by natural processes that regulate the association between endogenous ECMs and GFs. The purpose of this review is to summarize research centered on the development of regenerative scaffolds that replicate the fundamental collagen-hydroxyapatite structure of native bone ECM, and the functionalization of these scaffolds with GFs that stimulate critical events in osteogenesis.
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Affiliation(s)
- Andrew S Curry
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1918 University Boulevard, Birmingham, AL 35294, United States
| | - Nicholas W Pensa
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1918 University Boulevard, Birmingham, AL 35294, United States
| | - Abby M Barlow
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, 1918 University Boulevard, Birmingham, AL 35294, United States
| | - Susan L Bellis
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1918 University Boulevard, Birmingham, AL 35294, United States; Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, 1918 University Boulevard, Birmingham, AL 35294, United States.
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Ferlin KM, Prendergast ME, Miller ML, Kaplan DS, Fisher JP. Influence of 3D printed porous architecture on mesenchymal stem cell enrichment and differentiation. Acta Biomater 2016; 32:161-169. [PMID: 26773464 DOI: 10.1016/j.actbio.2016.01.007] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 11/25/2015] [Accepted: 01/06/2016] [Indexed: 10/22/2022]
Abstract
The interactions between cells and an underlying biomaterial are important for the promotion of cell adhesion, proliferation, and function. Mesenchymal stem cells (MSCs) have great clinical potential as they are an adult stem cell population capable of multilineage differentiation. The relationship between MSC behavior and several material properties including substrate stiffness and pore size are well investigated, but there has been little research on the influence of porous architecture in a three-dimensional scaffold with a well-controlled architecture. Here, we investigate the impact of two different three-dimensionally printed, pore geometries on the enrichment and differentiation of MSCs. 3D printed scaffolds with ordered cubic pore geometry were supportive of MSC enrichment from unprocessed bone marrow, resulting in cell surface marker expression that was comparable to typical adhesion to tissue culture polystyrene, the gold standard for MSC culture. Results also show that scaffolds fabricated with ordered cubic pores significantly increase the gene expression of MSCs undergoing adipogenesis and chondrogenesis, when compared to scaffolds with ordered cylindrical pores. However, at the protein expression level, these differences were modest. For MSCs undergoing osteogenesis, gene expression results suggest that cylindrical pores may initially increase early osteogenic marker expression, while protein level expression at later timepoints is increased for scaffolds with ordered cubic pores. Taken together, these results suggest that 3D printed scaffolds with ordered cubic pores could be a suitable culture system for single-step MSC enrichment and differentiation. STATEMENT OF SIGNIFICANCE Mesenchymal stem cells (MSCs) have great therapeutic potential, as they are capable of multilineage differentiation. MSC behavior, including lineage commitment, may be influenced by biomaterial properties including substrate stiffness and pore size. With three-dimensional (3D) printing, we can investigate these relationships in 3D culture systems. Here, we fabricated scaffolds with two different well-controlled pore geometries, and investigated the impact on MSC enrichment and differentiation. Results show that scaffolds with ordered cubic pore geometry were supportive of both MSC enrichment from unprocessed bone marrow as well as MSC differentiation, resulting in increased gene expression during adipogenesis and chondrogenesis. These results suggest that 3D printed scaffolds with ordered cubic pores could be a suitable culture system for single-step MSC enrichment and differentiation.
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107
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Qi H, Ye Z, Ren H, Chen N, Zeng Q, Wu X, Lu T. Bioactivity assessment of PLLA/PCL/HAP electrospun nanofibrous scaffolds for bone tissue engineering. Life Sci 2016; 148:139-44. [PMID: 26874032 DOI: 10.1016/j.lfs.2016.02.040] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 01/19/2016] [Accepted: 02/10/2016] [Indexed: 01/24/2023]
Abstract
AIMS The purpose of this paper was to fabricate PLLA/PCL nanofibrous scaffolds containing HAP to mimic the native bone extracellular matrix for potential applications as bone tissue engineering scaffolds materials and ultimately to help the repairing of bone defects. MATERIALS AND METHODS PLLA (MW 200kDa), PCL (MW 80kDa), HAP, dichloromethane, N,N-dimethylformamide; α-MEM, FBS, trypsin-EDTA, penicillin G, streptomycin, β-sodium glycerophosphate, l-ascorbic acid, dexamethasone; CCK-8, Alkaline Phosphatase Assay Kit, Mouse Osteocalcin ELISA Kit, MC3T3-E1 cells. PLLA, PCL and HAP were dissolved in the solution of DCM and DMF to fabricate nanofibrous scaffolds through electrospinning. The morphology of the scaffolds was investigated with SEM, while the diameter of the fibers, pore size and water uptake of the scaffolds were tested, respectively. TGA was carried out to verify the percentage of HAP in the composite scaffolds fabricated with different HAP concentrations. Cell count kit-8 assay, alkaline phosphatase (ALP) assay, and osteocalcin assay were applied to observe the MC3T3-E1 cells proliferation, differentiation on the composite scaffolds. KEY FINDINGS MC3T3-E1 cells were found to grow actively on the composite scaffolds based on the results of CCK-8 assay. The level of MC3T3-E1 differentiation was evaluated through the ALP activity and osteocalcin concentration, which showed higher value with HAP containing (PLLA/PCL/HAP) than that ones without (PLLA/PCL). SIGNIFICANCE The results demonstrated that the biocomposite PLLA/PCL/HAP nanofibrous scaffold should be a promising candidate for proliferation, differentiation and mineralization of osteoblasts, and potentially can be used for bone tissue regeneration.
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Affiliation(s)
- Hongfei Qi
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi, People's Republic of China
| | - Zhihong Ye
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi, People's Republic of China
| | - Hailong Ren
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi, People's Republic of China
| | - Nana Chen
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi, People's Republic of China
| | - Qingyan Zeng
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi, People's Republic of China
| | - Xianglong Wu
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi, People's Republic of China
| | - Tingli Lu
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi, People's Republic of China.
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108
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Jun I, Chung YW, Heo YH, Han HS, Park J, Jeong H, Lee H, Lee YB, Kim YC, Seok HK, Shin H, Jeon H. Creating Hierarchical Topographies on Fibrous Platforms Using Femtosecond Laser Ablation for Directing Myoblasts Behavior. ACS APPLIED MATERIALS & INTERFACES 2016; 8:3407-3417. [PMID: 26771693 DOI: 10.1021/acsami.5b11418] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Developing an artificial extracellular matrix that closely mimics the native tissue microenvironment is important for use as both a cell culture platform for controlling cell fate and an in vitro model system for investigating the role of the cellular microenvironment. Electrospinning, one of the methods for fabricating structures that mimic the native ECM, is a promising technique for creating fibrous platforms. It is well-known that align or randomly distributed electrospun fibers provide cellular contact guidance in a single pattern. However, native tissues have hierarchical structures, i.e., topographies on the micro- and nanoscales, rather than a single structure. Thus, we fabricated randomly distributed nanofibrous (720 ± 80 nm in diameter) platforms via a conventional electrospinning process, and then we generated microscale grooves using a femtosecond laser ablation process to develop engineered fibrous platforms with patterned hierarchical topographies. The engineered fibrous platforms can regulate cellular adhesive morphology, proliferation, and distinct distribution of focal adhesion proteins. Furthermore, confluent myoblasts cultured on the engineered fibrous platforms revealed that the direction of myotube assembly can be controlled. These results indicate that our engineered fibrous platforms may be useful tools in investigating the roles of nano- and microscale topographies in the communication between cells and ECM.
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Affiliation(s)
- Indong Jun
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science & Technology , Seoul 02792, Republic of Korea
| | - Yong-Woo Chung
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science & Technology , Seoul 02792, Republic of Korea
- Department of Mechanical Engineering, Korea University , Seoul 02841, Republic of Korea
| | - Yun-Hoe Heo
- Department of Bioengineering, Hanyang University , Seoul 04763, Republic of Korea
- BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team , Seoul 133-791, Republic of Korea
| | - Hyung-Seop Han
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science & Technology , Seoul 02792, Republic of Korea
| | - Jimin Park
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science & Technology , Seoul 02792, Republic of Korea
| | - Hongsoo Jeong
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science & Technology , Seoul 02792, Republic of Korea
- Department of Mechanical Engineering, Korea University , Seoul 02841, Republic of Korea
| | - Hyunjung Lee
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science & Technology , Seoul 02792, Republic of Korea
| | - Yu Bin Lee
- Department of Bioengineering, Hanyang University , Seoul 04763, Republic of Korea
- BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team , Seoul 133-791, Republic of Korea
| | - Yu-Chan Kim
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science & Technology , Seoul 02792, Republic of Korea
- Korea University of Science and Technology , Daejeon 34113, Republic of Korea
| | - Hyun-Kwang Seok
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science & Technology , Seoul 02792, Republic of Korea
- Korea University of Science and Technology , Daejeon 34113, Republic of Korea
| | - Heungsoo Shin
- Department of Bioengineering, Hanyang University , Seoul 04763, Republic of Korea
- BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team , Seoul 133-791, Republic of Korea
| | - Hojeong Jeon
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science & Technology , Seoul 02792, Republic of Korea
- Korea University of Science and Technology , Daejeon 34113, Republic of Korea
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109
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Si J, Cui Z, Wang Q, Liu Q, Liu C. Biomimetic composite scaffolds based on mineralization of hydroxyapatite on electrospun poly(ɛ-caprolactone)/nanocellulose fibers. Carbohydr Polym 2016; 143:270-8. [PMID: 27083369 DOI: 10.1016/j.carbpol.2016.02.015] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2015] [Revised: 02/03/2016] [Accepted: 02/04/2016] [Indexed: 11/24/2022]
Abstract
A biomimetic nanocomposite scaffold with HA formation on the electrospun poly(ɛ-caprolactone) (PCL)/nanocellulose (NC) fibrous matrix was developed in this study. The electrospun PCL/NC fiber mat was built and then biomineralized by treatment in simulated body fluid (SBF). Using such a rapid and effective procedure, a continuous biomimetic crystalline HA layer could be successfully formed without the need of any additional chemical modification of the substrate surface. The results showed that the introduction of NC into composite fibers is an effective approach to induce the deposition of HA nucleus as well as to improve their distribution and growth of a crystalline HA layer on the fibrous scaffolds. The water contact angle (WCA) of the PCL/NC/HA scaffolds decreases with increasing NC content and mineralization time, resulting in the enhancement of their hydrophilicity. These results indicated that HA-mineralized on PCL/NC fiber can be prepared directly by simply using SBF immersion.
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Affiliation(s)
- Junhui Si
- School of Materials Science and Engineering, Zhengzhou University, Henan 450001, China; School of Materials Science and Engineering, Fujian University of Technology, Fujian 350118, China
| | - Zhixiang Cui
- School of Materials Science and Engineering, Fujian University of Technology, Fujian 350118, China; National Center for International Research of Micro-nano Molding Technology & Key Laboratory for Micro Molding Technology of Henan Province, Henan 450001, China.
| | - Qianting Wang
- School of Materials Science and Engineering, Fujian University of Technology, Fujian 350118, China
| | - Qiong Liu
- School of Materials Science and Engineering, Fujian University of Technology, Fujian 350118, China
| | - Chuntai Liu
- School of Materials Science and Engineering, Zhengzhou University, Henan 450001, China.
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Kasoju N, Kubies D, Sedlačík T, Janoušková O, Koubková J, Kumorek MM, Rypáček F. Polymer scaffolds with no skin-effect for tissue engineering applications fabricated by thermally induced phase separation. ACTA ACUST UNITED AC 2016; 11:015002. [PMID: 26752658 DOI: 10.1088/1748-6041/11/1/015002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Thermally induced phase separation (TIPS) based methods are widely used for the fabrication of porous scaffolds for tissue engineering and related applications. However, formation of a less-/non-porous layer at the scaffold's outer surface at the air-liquid interface, often known as the skin-effect, restricts the cell infiltration inside the scaffold and therefore limits its efficacy. To this end, we demonstrate a TIPS-based process involving the exposure of the just quenched poly(lactide-co-caprolactone):dioxane phases to the pure dioxane for a short time while still being under the quenching strength, herein after termed as the second quenching (2Q). Scanning electron microscopy, mercury intrusion porosimetry and contact angle analysis revealed a direct correlation between the time of 2Q and the gradual disappearance of the skin, followed by the widening of the outer pores and the formation of the fibrous filaments over the surface, with no effect on the internal pore architecture and the overall porosity of scaffolds. The experiments at various quenching temperatures and polymer concentrations revealed the versatility of 2Q in removing the skin. In addition, the in vitro cell culture studies with the human primary fibroblasts showed that the scaffolds prepared by the TIPS based 2Q process, with the optimal exposure time, resulted in a higher cell seeding and viability in contrast to the scaffolds prepared by the regular TIPS. Thus, TIPS including the 2Q step is a facile, versatile and innovative approach to fabricate the polymer scaffolds with a skin-free and fully open porous surface morphology for achieving a better cell response in tissue engineering and related applications.
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Affiliation(s)
- Naresh Kasoju
- Department of Biomaterials and Bioanalogous Polymer Systems, Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Prague, Czech Republic
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Mokhtari-Jafari F, Amoabediny G, Haghighipour N, Zarghami R, Saatchi A, Akbari J, Salehi-Nik N. Mathematical modeling of cell growth in a 3D scaffold and validation of static and dynamic cultures. Eng Life Sci 2016. [DOI: 10.1002/elsc.201500047] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Affiliation(s)
- Fatemeh Mokhtari-Jafari
- School of Chemical Engineering; College of Engineering; University of Tehran; Tehran Iran
- Department of Biomedical Engineering; Research Center for New Technologies in Life Science Engineering; University of Tehran; Tehran Iran
- National Cell Bank of Iran; Pasteur Institute of Iran; Tehran Iran
| | - Ghassem Amoabediny
- School of Chemical Engineering; College of Engineering; University of Tehran; Tehran Iran
- Department of Biomedical Engineering; Research Center for New Technologies in Life Science Engineering; University of Tehran; Tehran Iran
| | | | - Reza Zarghami
- School of Chemical Engineering; College of Engineering; University of Tehran; Tehran Iran
| | - Alireza Saatchi
- School of Chemical Engineering; College of Engineering; University of Tehran; Tehran Iran
- Department of Biomedical Engineering; Research Center for New Technologies in Life Science Engineering; University of Tehran; Tehran Iran
| | - Javad Akbari
- School of Chemical Engineering; College of Engineering; University of Tehran; Tehran Iran
- Department of Biomedical Engineering; Research Center for New Technologies in Life Science Engineering; University of Tehran; Tehran Iran
| | - Nasim Salehi-Nik
- School of Chemical Engineering; College of Engineering; University of Tehran; Tehran Iran
- Department of Biomedical Engineering; Research Center for New Technologies in Life Science Engineering; University of Tehran; Tehran Iran
- National Cell Bank of Iran; Pasteur Institute of Iran; Tehran Iran
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112
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Guarino V, Cirillo V, Ambrosio L. Bicomponent electrospun scaffolds to design extracellular matrix tissue analogs. Expert Rev Med Devices 2015; 13:83-102. [PMID: 26619260 DOI: 10.1586/17434440.2016.1126505] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
In the last decade, bicomponent fibers have been proposed to fabricate bio-inspired systems for tissue repair, regenerative medicine, medical healthcare and clinical applications. In comparison with monocomponent fibers, key advantage concerns their ability of self-adapting to the physiological conditions through an extended pattern of signals--morphological, chemical and physical ones--confined at the single fiber level. Hydrophobic/hydrophilic phases may be variously organized by tuneable processing modes (i.e., blending, core/shell, interweaving) thus offering different benefits in terms of biological activity, fluid sorption and molecular transport properties (first generation). The possibility to efficiently graft cell-adhesive proteins and peptide sequences onto the fiber surface mediated by spacers or impregnating hydrogels allows to trigger cell late activities by a controlled and sustained release in vitro of specific biomolecules (i.e., morphogens, growth factors). Here, we introduce an overview of current approaches based on bicomponent fiber use as extra cellular matrix analogs with cell-instructive functions and hierarchal organization of living tissues.
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Affiliation(s)
- Vincenzo Guarino
- a Institute for Polymers, Composites and Biomaterials, Department of Chemical Sciences & Materials Technology , National Research Council of Italy , 80125 Naples , Italy
| | - Valentina Cirillo
- a Institute for Polymers, Composites and Biomaterials, Department of Chemical Sciences & Materials Technology , National Research Council of Italy , 80125 Naples , Italy
| | - Luigi Ambrosio
- a Institute for Polymers, Composites and Biomaterials, Department of Chemical Sciences & Materials Technology , National Research Council of Italy , 80125 Naples , Italy
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113
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Yang N, Gao L, Zhou K. Simple method to generate and fabricate stochastic porous scaffolds. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 56:444-50. [DOI: 10.1016/j.msec.2015.06.039] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 03/04/2015] [Accepted: 06/22/2015] [Indexed: 11/29/2022]
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114
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Shamaz BH, Anitha A, Vijayamohan M, Kuttappan S, Nair S, Nair MB. Relevance of fiber integrated gelatin-nanohydroxyapatite composite scaffold for bone tissue regeneration. NANOTECHNOLOGY 2015; 26:405101. [PMID: 26373968 DOI: 10.1088/0957-4484/26/40/405101] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Porous nanohydroxyapatite (nanoHA) is a promising bone substitute, but it is brittle, which limits its utility for load bearing applications. To address this issue, herein, biodegradable electrospun microfibrous sheets of poly(L-lactic acid)-(PLLA)-polyvinyl alcohol (PVA) were incorporated into a gelatin-nanoHA matrix which was investigated for its mechanical properties, the physical integration of the fibers with the matrix, cell infiltration, osteogenic differentiation and bone regeneration. The inclusion of sacrificial fibers like PVA along with PLLA and leaching resulted in improved cellular infiltration towards the center of the scaffold. Furthermore, the treatment of PLLA fibers with 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide enhanced their hydrophilicity, ensuring firm anchorage between the fibers and the gelatin-HA matrix. The incorporation of PLLA microfibers within the gelatin-nanoHA matrix reduced the brittleness of the scaffolds, the effect being proportional to the number of layers of fibrous sheets in the matrix. The proliferation and osteogenic differentiation of human adipose-derived mesenchymal stem cells was augmented on the fibrous scaffolds in comparison to those scaffolds devoid of fibers. Finally, the scaffold could promote cell infiltration, together with bone regeneration, upon implantation in a rabbit femoral cortical defect within 4 weeks. The bone regeneration potential was significantly higher when compared to commercially available HA (Surgiwear™). Thus, this biomimetic, porous, 3D composite scaffold could be offered as a promising candidate for bone regeneration in orthopedics.
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Affiliation(s)
- Bibi Halima Shamaz
- Amrita Center for Nanosciences and Molecular Medicine, Amrita Institute of Medical Sciences & Research Center, Amrita Vishwa Vidyapeetham University, Kochi, Kerala 682041, India
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Li YF, Gregersen H, Nygaard JV, Cheng W, Yu Y, Huang Y, Dong M, Besenbacher F, Chen M. Ultraporous nanofeatured PCL-PEO microfibrous scaffolds enhance cell infiltration, colonization and myofibroblastic differentiation. NANOSCALE 2015; 7:14989-14995. [PMID: 26308365 DOI: 10.1039/c5nr04244e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In the field of tissue engineering, integration of micro-porosity, nano-topogaphical features and weattability into one three-dimensional (3D) scaffold remains a challenge. The extracellular matrix (ECM) mimicking feature of electrospun fibers endows them wide applications in tissue engineering. However, the tight-packing of electrospun submicron fibers hinder cell infiltration and further colonization. In this study, we fabricated hydrophilic, micro-porous scaffolds with nano-topographical cues by one-step electrospinning, and investigated NIH3T3 fibroblasts cell infiltration, colonization and myofibroblastic differentiation. The hierarchical porosity enhanced cell infiltration and proliferation significantly. Besides, the nano-topography influenced the cell actin distribution and cell morphology that stimulated myofibroblastic differentiation in a drastically different manner from that of traditional solid, smooth electrospun fibers, which may hold great potential in reconstructing tissues that require strong contractile forces.
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Affiliation(s)
- Yan-Fang Li
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, DK-8000 Aarhus C, Denmark.
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Brennan MÁ, Renaud A, Gamblin AL, D'Arros C, Nedellec S, Trichet V, Layrolle P. 3D cell culture and osteogenic differentiation of human bone marrow stromal cells plated onto jet-sprayed or electrospun micro-fiber scaffolds. ACTA ACUST UNITED AC 2015; 10:045019. [PMID: 26238732 DOI: 10.1088/1748-6041/10/4/045019] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A major limitation of the 2D culture systems is that they fail to recapitulate the in vivo 3D cellular microenvironment whereby cell-cell and cell-extracellular matrix (ECM) interactions occur. In this paper, a biomaterial scaffold that mimics the structure of collagen fibers was produced by jet-spraying. This micro-fiber polycaprolactone (PCL) scaffold was evaluated for 3D culture of human bone marrow mesenchymal stromal cells (MSCs) in comparison with a commercially available electrospun scaffold. The jet-sprayed scaffolds had larger pore diameters, greater porosity, smaller diameter fibers, and more heterogeneous fiber diameter size distribution compared to the electrospun scaffolds. Cells on jet-sprayed constructs exhibited spread morphology with abundant cytoskeleton staining, whereas MSCs on electrospun scaffolds appeared less extended with fewer actin filaments. MSC proliferation and cell infiltration occurred at a faster rate on jet-sprayed compared to electrospun scaffolds. Osteogenic differentiation of MSCs and ECM production as measured by ALP, collagen and calcium deposition was superior on jet-sprayed compared to electrospun scaffolds. The jet-sprayed scaffold which mimics the native ECM and permits homogeneous cell infiltration is important for 3D in vitro applications such as bone cellular interaction studies or drug testing, as well as bone tissue engineering strategies.
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Affiliation(s)
- Meadhbh Á Brennan
- INSERM UMR 957, Laboratory of Pathophysiology of Bone Resorption and Primary Bone Tumour Therapy, Faculty of Medicine, University of Nantes, France
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117
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Gładysz D, Hozyasz KK. Stem cell regenerative therapy in alveolar cleft reconstruction. Arch Oral Biol 2015; 60:1517-32. [PMID: 26263541 DOI: 10.1016/j.archoralbio.2015.07.003] [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: 12/15/2014] [Revised: 05/23/2015] [Accepted: 07/04/2015] [Indexed: 12/17/2022]
Abstract
Achieving a successful and well-functioning reconstruction of craniofacial deformities still remains a challenge. As for now, autologous bone grafting remains the gold standard for alveolar cleft reconstruction. However, its aesthetic and functional results often remain unsatisfactory, which carries a long-term psychosocial and medical sequelae. Therefore, searching for novel therapeutic approaches is strongly indicated. With the recent advances in stem cell research, cell-based tissue engineering strategies move from the bench to the patients' bedside. Successful stem cell engineering employs a carefully selected stem cell source, a biodegradable scaffold with osteoconductive and osteoinductive properties, as well as an addition of growth factors or cytokines to enhance osteogenesis. This review highlights recent advances in mesenchymal stem cell tissue engineering, discusses animal models and case reports of stem cell enhanced bone regeneration, as well as ongoing clinical trials.
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Affiliation(s)
- Dominika Gładysz
- Department of Pediatrics, Institute of Mother and Child, Warsaw, Poland
| | - Kamil K Hozyasz
- Department of Pediatrics, Institute of Mother and Child, Warsaw, Poland.
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118
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Jiang T, Carbone EJ, Lo KWH, Laurencin CT. Electrospinning of polymer nanofibers for tissue regeneration. Prog Polym Sci 2015. [DOI: 10.1016/j.progpolymsci.2014.12.001] [Citation(s) in RCA: 336] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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119
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Holt-Casper D, Theisen JM, Moreno AP, Warren M, Silva F, Grainger DW, Bull DA, Patel AN. Novel xeno-free human heart matrix-derived three-dimensional scaffolds. J Transl Med 2015; 13:194. [PMID: 26084398 PMCID: PMC4505384 DOI: 10.1186/s12967-015-0559-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 06/02/2015] [Indexed: 12/05/2022] Open
Abstract
Rationale Myocardial infarction (MI) results in damaged heart tissue which can progress to severely reduce cardiac function, leading to death. Recent studies have injected dissociated, suspended cardiac cells into coronary arteries to restore function with limited results attributed to poor cell retention and cell death. Extracellular matrix (ECM) injected into damaged cardiac tissue sites show some promising effects. However, combined use of human cardiac ECM and cardiac cells may produce superior benefits to restore cardiac function. Objective This study was designed to assess use of new three-dimensional human heart ECM-derived scaffolds to serve as vehicles to deliver cardiac-derived cells directly to damaged heart tissue and improve cell retention at these sites while also providing biomechanical support and attracting host cell recruitment. Methods and Results ECM-derived porous protein scaffolds were fabricated from human heart tissues. These scaffolds were designed to carry, actively promote and preserve cardiac cell phenotype, viability and functional retention in tissue sites. ECM scaffolds were optimized and were seeded with human cardiomyocytes, cultured and subsequently implanted ex vivo onto infarcted murine epicardium. Seeded human cardiomyocytes readily adhered to human cardiac-derived ECM scaffolds and maintained representative phenotypes including expression of cardiomyocyte-specific markers, and remained electrically synchronous within the scaffold in vitro. Ex vivo, cardiomyocyte-seeded ECM scaffolds spontaneously adhered and incorporated into murine ventricle. Conclusions Decellularized human cardiac tissue-derived 3D ECM scaffolds are effective delivery vehicles for human cardiac cells to directly target ischemic heart tissue and warrant further studies to assess their therapeutic potential in restoring essential cardiac functions. Electronic supplementary material The online version of this article (doi:10.1186/s12967-015-0559-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Dolly Holt-Casper
- Division of Cardiothoracic Surgery, Department of Surgery, University of Utah, Salt Lake City, UT, 84112, USA. .,Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, 84112, USA.
| | - Jeff M Theisen
- Division of Cardiothoracic Surgery, Department of Surgery, University of Utah, Salt Lake City, UT, 84112, USA. .,Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, 84112, USA.
| | - Alonso P Moreno
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, 84112-5000, USA. .,Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, 84112, USA.
| | - Mark Warren
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, 84112-5000, USA. .,Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, 84112, USA.
| | - Francisco Silva
- Division of Cardiothoracic Surgery, Department of Surgery, University of Utah, Salt Lake City, UT, 84112, USA. .,Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, 84112, USA.
| | - David W Grainger
- Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, 84112-5000, USA. .,Department of Bioengineering, University of Utah, Salt Lake City, UT, 84112, USA. .,Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, 84112, USA.
| | - David A Bull
- Division of Cardiothoracic Surgery, Department of Surgery, University of Utah, Salt Lake City, UT, 84112, USA. .,Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, 84112-5000, USA. .,Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, 84112, USA.
| | - Amit N Patel
- Division of Cardiothoracic Surgery, Department of Surgery, University of Utah, Salt Lake City, UT, 84112, USA. .,Nora Eccles Harrison Cardiovascular Research and Training Institute, University of Utah, Salt Lake City, UT, 84112-5000, USA. .,Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, 84112, USA. .,University of Utah, 30 N 1900 E SOM 3c127, Salt Lake City, UT, 84132, USA.
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Chen S, Jian Z, Huang L, Xu W, Liu S, Song D, Wan Z, Vaughn A, Zhan R, Zhang C, Wu S, Hu M, Li J. Mesoporous bioactive glass surface modified poly(lactic-co-glycolic acid) electrospun fibrous scaffold for bone regeneration. Int J Nanomedicine 2015; 10:3815-27. [PMID: 26082632 PMCID: PMC4459617 DOI: 10.2147/ijn.s82543] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
A mesoporous bioactive glass (MBG) surface modified with poly(lactic-co-glycolic acid) (PLGA) electrospun fibrous scaffold for bone regeneration was prepared by dip-coating a PLGA electrospun fibrous scaffold into MBG precursor solution. Different surface structures and properties were acquired by different coating times. Surface morphology, chemical composition, microstructure, pore size distribution, and hydrophilicity of the PLGA-MBG scaffold were characterized. Results of scanning electron microscopy indicated that MBG surface coating made the scaffold rougher with the increase of MBG content. Scaffolds after MBG modification possessed mesoporous architecture on the surface. The measurements of the water contact angles suggested that the incorporation of MBG into the PLGA scaffold improved the surface hydrophilicity. An energy dispersive spectrometer evidenced that calcium-deficient carbonated hydroxyapatite formed on the PLGA-MBG scaffolds after a 7-day immersion in simulated body fluid. In vitro studies showed that the incorporation of MBG favored cell proliferation and osteogenic differentiation of human mesenchymal stem cells on the PLGA scaffolds. Moreover, the MBG surface-modified PLGA (PLGA-MBG) scaffolds were shown to be capable of providing the improved adsorption/release behaviors of bone morphogenetic protein-2 (BMP-2). It is very significant that PLGA-MBG scaffolds could be effective for BMP-2 delivery and bone regeneration.
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Affiliation(s)
- Shijie Chen
- Department of Orthopaedics, The Third Xiangya Hospital of Central South University, Changsha, Hunan, People's Republic of China
| | - Zhiyuan Jian
- The First General Surgery Department of Shiyan Taihe Hospital Affiliated to Hubei University of Medicine, Shiyan, People's Republic of China
| | - Linsheng Huang
- The First General Surgery Department of Shiyan Taihe Hospital Affiliated to Hubei University of Medicine, Shiyan, People's Republic of China
| | - Wei Xu
- Department of Orthopedic Oncology, Changzheng Hospital, The Second Military Medical University, Shanghai, People's Republic of China
| | - Shaohua Liu
- Department of Spine Surgery, Xiangya Hospital of Central South University, Changsha, Hunan, People's Republic of China
| | - Dajiang Song
- Department of Orthopedic Oncology, Changzheng Hospital, The Second Military Medical University, Shanghai, People's Republic of China
| | - Zongmiao Wan
- Department of Orthopedic Oncology, Changzheng Hospital, The Second Military Medical University, Shanghai, People's Republic of China
| | - Amanda Vaughn
- Department of Molecular Biosciences, Institute of Cellular and Molecular Biology, The University of Texas at Austin, Austin, TX, USA
| | - Ruisen Zhan
- Department of Orthopaedics, The Third Xiangya Hospital of Central South University, Changsha, Hunan, People's Republic of China
| | - Chaoyue Zhang
- Department of Orthopaedics, The Third Xiangya Hospital of Central South University, Changsha, Hunan, People's Republic of China
| | - Song Wu
- Department of Orthopaedics, The Third Xiangya Hospital of Central South University, Changsha, Hunan, People's Republic of China
| | - Minghua Hu
- Department of Anthropotomy, Changsha Medical College, Changsha, Hunan, People's Republic of China
| | - Jinsong Li
- Department of Orthopaedics, The Third Xiangya Hospital of Central South University, Changsha, Hunan, People's Republic of China
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121
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Yildirimer L, Seifalian A. Tissue engineering. Plast Reconstr Surg 2015. [DOI: 10.1002/9781118655412.ch7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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122
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Bonvallet PP, Schultz MJ, Mitchell EH, Bain JL, Culpepper BK, Thomas SJ, Bellis SL. Microporous dermal-mimetic electrospun scaffolds pre-seeded with fibroblasts promote tissue regeneration in full-thickness skin wounds. PLoS One 2015; 10:e0122359. [PMID: 25793720 PMCID: PMC4368828 DOI: 10.1371/journal.pone.0122359] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 02/16/2015] [Indexed: 11/19/2022] Open
Abstract
Electrospun scaffolds serve as promising substrates for tissue repair due to their nanofibrous architecture and amenability to tailoring of chemical composition. In this study, the regenerative potential of a microporous electrospun scaffold pre-seeded with dermal fibroblasts was evaluated. Previously we reported that a 70% collagen I and 30% poly(Ɛ-caprolactone) electrospun scaffold (70:30 col/PCL) containing 160 μm diameter pores had favorable mechanical properties, supported fibroblast infiltration and subsequent cell-mediated deposition of extracellular matrix (ECM), and promoted more rapid and effective in vivo skin regeneration when compared to scaffolds lacking micropores. In the current study we tested the hypothesis that the efficacy of the 70:30 col/PCL microporous scaffolds could be further enhanced by seeding scaffolds with dermal fibroblasts prior to implantation into skin wounds. To address this hypothesis, a Fischer 344 (F344) rat syngeneic model was employed. In vitro studies showed that dermal fibroblasts isolated from F344 rat skin were able to adhere and proliferate on 70:30 col/PCL microporous scaffolds, and the cells also filled the 160 μm pores with native ECM proteins such as collagen I and fibronectin. Additionally, scaffolds seeded with F344 fibroblasts exhibited a low rate of contraction (~14%) over a 21 day time frame. To assess regenerative potential, scaffolds with or without seeded F344 dermal fibroblasts were implanted into full thickness, critical size defects created in F344 hosts. Specifically, we compared: microporous scaffolds containing fibroblasts seeded for 4 days; scaffolds containing fibroblasts seeded for only 1 day; acellular microporous scaffolds; and a sham wound (no scaffold). Scaffolds containing fibroblasts seeded for 4 days had the best response of all treatment groups with respect to accelerated wound healing, a more normal-appearing dermal matrix structure, and hair follicle regeneration. Collectively these results suggest that microporous electrospun scaffolds pre-seeded with fibroblasts promote greater wound-healing than acellular scaffolds.
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Affiliation(s)
- Paul P. Bonvallet
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Matthew J. Schultz
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Elizabeth H. Mitchell
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Jennifer L. Bain
- Department of Periodontology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Bonnie K. Culpepper
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Steven J. Thomas
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Susan L. Bellis
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- * E-mail:
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Guo B, Lei B, Li P, Ma PX. Functionalized scaffolds to enhance tissue regeneration. Regen Biomater 2015; 2:47-57. [PMID: 25844177 PMCID: PMC4383297 DOI: 10.1093/rb/rbu016] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2014] [Revised: 10/18/2014] [Accepted: 10/12/2014] [Indexed: 12/12/2022] Open
Abstract
Tissue engineering scaffolds play a vital role in regenerative medicine. It not only provides a temporary 3-dimensional support during tissue repair, but also regulates the cell behavior, such as cell adhesion, proliferation and differentiation. In this review, we summarize the development and trends of functional scaffolding biomaterials including electrically conducting hydrogels and nano-composites of hydroxyapatite (HA) and bioactive glasses (BGs) with various biodegradable polymers. Furthermore, the progress on the fabrication of biomimetic nanofibrous scaffolds from conducting polymers and composites of HA and BG via electrospinning, deposition and thermally induced phase separation is discussed. Moreover, bioactive molecules and surface properties of scaffolds are very important during tissue repair. Bioactive molecule-releasing scaffolds and antimicrobial surface coatings for biomedical implants and scaffolds are also reviewed.
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Affiliation(s)
- Baolin Guo
- Center for Biomedical Engineering and Regenerative Medicine, Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China, Department of Biomedical Engineering, University of Michigan, Department of Biologic and Materials Sciences, University of Michigan, 1011, North University Avenue, Room 2209, Macromolecular Science and Engineering Center, University of Michigan, and Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Bo Lei
- Center for Biomedical Engineering and Regenerative Medicine, Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China, Department of Biomedical Engineering, University of Michigan, Department of Biologic and Materials Sciences, University of Michigan, 1011, North University Avenue, Room 2209, Macromolecular Science and Engineering Center, University of Michigan, and Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Peng Li
- Center for Biomedical Engineering and Regenerative Medicine, Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China, Department of Biomedical Engineering, University of Michigan, Department of Biologic and Materials Sciences, University of Michigan, 1011, North University Avenue, Room 2209, Macromolecular Science and Engineering Center, University of Michigan, and Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Peter X. Ma
- Center for Biomedical Engineering and Regenerative Medicine, Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China, Department of Biomedical Engineering, University of Michigan, Department of Biologic and Materials Sciences, University of Michigan, 1011, North University Avenue, Room 2209, Macromolecular Science and Engineering Center, University of Michigan, and Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA
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Selders GS, Fetz AE, Speer SL, Bowlin GL. Fabrication and characterization of air-impedance electrospun polydioxanone templates. ACTA ACUST UNITED AC 2015. [DOI: 10.1515/esp-2016-0003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractElectrospinning, a fabrication technique used to create non-woven, porous templates from natural and synthetic polymers, is commonly used in tissue engineering because it is highly tailorable. However, traditional electrospinning creates restrictive pore sizes that limit the required cell migration. Therefore, tissue engineering groups have sought to enhance and regulate porosity of tissue engineering templates. Air-impedance electrospinning generates templates with tailorable, patterned areas of low and high density fiber deposition. Here we demonstrate an improved air-impedance electrospinning system, consisting of a newly designed funnel equipped to hold changeable porous deposition plates and administer air flow in a confined and focused manner, with parameters that maintain template integrity. In this preliminary study, we quantify the increase in porosity of polydioxanone templates with use of traditional fiber and pore analysis as well as with mercury porosimetry. Additionally, we validate the system’s significance in fabricating enhanced porosity templates that maintain their mechanical properties (i.e. elastic modulus, tensile strength, and suture retention strength) despite the deliberate increase in porosity. This is of exceptional value to the template’s integrity and efficacy as these parameters can be further optimized to induce the desired template porosity, strength, and texture for a given application.
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Khorshidi S, Solouk A, Mirzadeh H, Mazinani S, Lagaron JM, Sharifi S, Ramakrishna S. A review of key challenges of electrospun scaffolds for tissue-engineering applications. J Tissue Eng Regen Med 2015; 10:715-38. [DOI: 10.1002/term.1978] [Citation(s) in RCA: 323] [Impact Index Per Article: 35.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 09/09/2014] [Accepted: 11/10/2014] [Indexed: 12/26/2022]
Affiliation(s)
- Sajedeh Khorshidi
- Biomedical Engineering Faculty; Amirkabir University of Technology (Tehran Polytechnic); Tehran Iran
| | - Atefeh Solouk
- Biomedical Engineering Faculty; Amirkabir University of Technology (Tehran Polytechnic); Tehran Iran
| | - Hamid Mirzadeh
- Polymer Engineering Faculty; Amirkabir University of Technology (Tehran Polytechnic); Tehran Iran
| | - Saeedeh Mazinani
- Amirkabir Nanotechnology Research Institute (ANTRI); Amirkabir University of Technology (Tehran Polytechnic); Tehran Iran
| | - Jose M. Lagaron
- Novel Materials and Nanotechnology Group; IATA-CSIC; Avda Agustı'n Escardino 7 46980 Burjassot Spain
| | - Shahriar Sharifi
- Department of Biomaterials Science and Technology; University of Twente; Enschede The Netherlands
| | - Seeram Ramakrishna
- Nanoscience and Nanotechnology Initiative; National University of Singapore; Singapore
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Lyer S, Cicha I, Friedrich RP, Janko C, Alexiou C. Highlights from the latest articles in nanoparticles, nanomaterials and nanotoxicity testing. Nanomedicine (Lond) 2015; 10:181-4. [DOI: 10.2217/nnm.14.207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- Stefan Lyer
- ENT-Department, Section of Experimental Oncology & Nanomedicine (SEON), Else Kröner-Fresenius-Stiftung-Professorship for Nanomedicine, University Hospital Erlangen, Glueckstr. 10a, 91054 Erlangen, Germany
| | - Iwona Cicha
- ENT-Department, Section of Experimental Oncology & Nanomedicine (SEON), Else Kröner-Fresenius-Stiftung-Professorship for Nanomedicine, University Hospital Erlangen, Glueckstr. 10a, 91054 Erlangen, Germany
| | - Ralf P Friedrich
- ENT-Department, Section of Experimental Oncology & Nanomedicine (SEON), Else Kröner-Fresenius-Stiftung-Professorship for Nanomedicine, University Hospital Erlangen, Glueckstr. 10a, 91054 Erlangen, Germany
| | - Christina Janko
- ENT-Department, Section of Experimental Oncology & Nanomedicine (SEON), Else Kröner-Fresenius-Stiftung-Professorship for Nanomedicine, University Hospital Erlangen, Glueckstr. 10a, 91054 Erlangen, Germany
| | - Christoph Alexiou
- ENT-Department, Section of Experimental Oncology & Nanomedicine (SEON), Else Kröner-Fresenius-Stiftung-Professorship for Nanomedicine, University Hospital Erlangen, Glueckstr. 10a, 91054 Erlangen, Germany
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127
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Guan J, Yang J, Dai J, Qin Y, Wang Y, Guo Y, Ke Q, Zhang C. Bioinspired nanostructured hydroxyapatite/collagen three-dimensional porous scaffolds for bone tissue engineering. RSC Adv 2015. [DOI: 10.1039/c5ra01487e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
A needle punching and bioinspired mineralization strategy has been developed to fabricate a collagen/hydroxyapatite porous scaffold for bone tissue engineering.
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Affiliation(s)
- Junjie Guan
- Department of Orthopedics Surgery
- Shanghai Jiaotong University Affiliated Sixth People's Hospital
- Shanghai 200233
- China
| | - Jun Yang
- The Education Ministry Key Lab of Resource Chemistry
- Shanghai Key Laboratory of Rare Earth Functional Materials
- Shanghai Normal University
- Shanghai 200234
- P. R. China
| | - Junqi Dai
- Department of Orthopedics Surgery
- Shanghai Jiaotong University Affiliated Sixth People's Hospital
- Shanghai 200233
- China
| | - Yunhao Qin
- Department of Orthopedics Surgery
- Shanghai Jiaotong University Affiliated Sixth People's Hospital
- Shanghai 200233
- China
| | - Yang Wang
- Department of Orthopedics Surgery
- Shanghai Jiaotong University Affiliated Sixth People's Hospital
- Shanghai 200233
- China
| | - Yaping Guo
- The Education Ministry Key Lab of Resource Chemistry
- Shanghai Key Laboratory of Rare Earth Functional Materials
- Shanghai Normal University
- Shanghai 200234
- P. R. China
| | - Qinfei Ke
- The Education Ministry Key Lab of Resource Chemistry
- Shanghai Key Laboratory of Rare Earth Functional Materials
- Shanghai Normal University
- Shanghai 200234
- P. R. China
| | - Changqing Zhang
- Department of Orthopedics Surgery
- Shanghai Jiaotong University Affiliated Sixth People's Hospital
- Shanghai 200233
- China
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128
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Frohbergh ME, Katsman A, Mondrinos MJ, Stabler CT, Hankenson KD, Oristaglio JT, Lelkes PI. Osseointegrative properties of electrospun hydroxyapatite-containing nanofibrous chitosan scaffolds. Tissue Eng Part A 2014; 21:970-81. [PMID: 25336062 DOI: 10.1089/ten.tea.2013.0789] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Our long-term goal is to develop smart biomaterials that can facilitate regeneration of critical-size craniofacial lesions. In this study, we tested the hypothesis that biomimetic scaffolds electrospun from chitosan (CTS) will promote tissue repair and regeneration in a critical size calvarial defect. To test this hypothesis, we first compared in vitro ability of electrospun CTS scaffolds crosslinked with genipin (CTS-GP) to those of mineralized CTS-GP scaffolds containing hydroxyapatite (CTS-HA-GP), by assessing proliferation/metabolic activity and alkaline phosphatase (ALP) levels of murine mesenchymal stem cells (mMSCs). The cells' metabolic activity exhibited a biphasic behavior, indicative of initial proliferation followed by subsequent differentiation for all scaffolds. ALP activity of mMSCs, a surrogate measure of osteogenic differentiation, increased over time in culture. After 3 weeks in maintenance medium, ALP activity of mMSCs seeded onto CTS-HA-GP scaffolds was approximately two times higher than that of cells cultured on CTS-GP scaffolds. The mineralized CTS-HA-GP scaffolds were also osseointegrative in vivo, as inferred from the enhanced bone regeneration in a murine model of critical size calvarial defects. Tissue regeneration was evaluated over a 3 month period by microCT and histology (Hematoxylin and Eosin and Masson's Trichrome). Treatment of the lesions with CTS-HA-GP scaffolds induced a 38% increase in the area of de novo generated mineralized tissue area after 3 months, whereas CTS-GP scaffolds only led to a 10% increase. Preseeding with mMSCs significantly enhanced the regenerative capacity of CTS-GP scaffolds (by ∼3-fold), to 35% increase in mineralized tissue area after 3 months. CTS-HA-GP scaffolds preseeded with mMSCs yielded 45% new mineralized tissue formation in the defects. We conclude that the presence of HA in the CTS-GP scaffolds significantly enhances their osseointegrative capacity and that mineralized chitosan-based scaffolds crosslinked with genipin may represent a unique biomaterial with possible clinical relevance for the repair of critical calvarial bone defects.
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Affiliation(s)
- Michael E Frohbergh
- 1 School of Biomedical Engineering, Science and Health Systems, Drexel University , Philadelphia, Pennsylvania
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129
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Albuquerque MTP, Valera MC, Nakashima M, Nör JE, Bottino MC. Tissue-engineering-based strategies for regenerative endodontics. J Dent Res 2014; 93:1222-31. [PMID: 25201917 DOI: 10.1177/0022034514549809] [Citation(s) in RCA: 153] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Stemming from in vitro and in vivo pre-clinical and human models, tissue-engineering-based strategies continue to demonstrate great potential for the regeneration of the pulp-dentin complex, particularly in necrotic, immature permanent teeth. Nanofibrous scaffolds, which closely resemble the native extracellular matrix, have been successfully synthesized by various techniques, including but not limited to electrospinning. A common goal in scaffold synthesis has been the notion of promoting cell guidance through the careful design and use of a collection of biochemical and physical cues capable of governing and stimulating specific events at the cellular and tissue levels. The latest advances in processing technologies allow for the fabrication of scaffolds where selected bioactive molecules can be delivered locally, thus increasing the possibilities for clinical success. Though electrospun scaffolds have not yet been tested in vivo in either human or animal pulpless models in immature permanent teeth, recent studies have highlighted their regenerative potential both from an in vitro and in vivo (i.e., subcutaneous model) standpoint. Possible applications for these bioactive scaffolds continue to evolve, with significant prospects related to the regeneration of both dentin and pulp tissue and, more recently, to root canal disinfection. Nonetheless, no single implantable scaffold can consistently guide the coordinated growth and development of the multiple tissue types involved in the functional regeneration of the pulp-dentin complex. The purpose of this review is to provide a comprehensive perspective on the latest discoveries related to the use of scaffolds and/or stem cells in regenerative endodontics. The authors focused this review on bioactive nanofibrous scaffolds, injectable scaffolds and stem cells, and pre-clinical findings using stem-cell-based strategies. These topics are discussed in detail in an attempt to provide future direction and to shed light on their potential translation to clinical settings.
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Affiliation(s)
- M T P Albuquerque
- Department of Restorative Dentistry, Division of Dental Biomaterials, Indiana University School of Dentistry, Indianapolis, IN 46202, USA Department of Restorative Dentistry, Division of Endodontics, Universidade Estadual Paulista, São José dos Campos Dental School, São José dos Campos, São Paulo, 12245-000, Brazil
| | - M C Valera
- Department of Restorative Dentistry, Division of Dental Biomaterials, Indiana University School of Dentistry, Indianapolis, IN 46202, USA
| | - M Nakashima
- Department of Dental Regenerative Medicine, Center of Advanced Medicine for Dental and Oral Diseases, National Center for Geriatrics and Gerontology, Research Institute, Obu, Aichi, 474-8511, Japan
| | - J E Nör
- Department of Cariology, Restorative Sciences and Endodontics, University of Michigan School of Dentistry, Ann Arbor, MI 48109, USA
| | - M C Bottino
- Department of Restorative Dentistry, Division of Dental Biomaterials, Indiana University School of Dentistry, Indianapolis, IN 46202, USA
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130
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Kutikov AB, Gurijala A, Song J. Rapid prototyping amphiphilic polymer/hydroxyapatite composite scaffolds with hydration-induced self-fixation behavior. Tissue Eng Part C Methods 2014; 21:229-41. [PMID: 25025950 DOI: 10.1089/ten.tec.2014.0213] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Two major factors hampering the broad use of rapid prototyped biomaterials for tissue engineering applications are the requirement for custom-designed or expensive research-grade three-dimensional (3D) printers and the limited selection of suitable thermoplastic biomaterials exhibiting physical characteristics desired for facile surgical handling and biological properties encouraging tissue integration. Properly designed thermoplastic biodegradable amphiphilic polymers can exhibit hydration-dependent hydrophilicity changes and stiffening behavior, which may be exploited to facilitate the surgical delivery/self-fixation of the scaffold within a physiological tissue environment. Compared to conventional hydrophobic polyesters, they also present significant advantages in blending with hydrophilic osteoconductive minerals with improved interfacial adhesion for bone tissue engineering applications. Here, we demonstrated the excellent blending of biodegradable, amphiphilic poly(D,L-lactic acid)-poly(ethylene glycol)-poly(D,L-lactic acid) (PLA-PEG-PLA) (PELA) triblock co-polymer with hydroxyapatite (HA) and the fabrication of high-quality rapid prototyped 3D macroporous composite scaffolds using an unmodified consumer-grade 3D printer. The rapid prototyped HA-PELA composite scaffolds and the PELA control (without HA) swelled (66% and 44% volume increases, respectively) and stiffened (1.38-fold and 4-fold increases in compressive modulus, respectively) in water. To test the hypothesis that the hydration-induced physical changes can translate into self-fixation properties of the scaffolds within a confined defect, a straightforward in vitro pull-out test was designed to quantify the peak force required to dislodge these scaffolds from a simulated cylindrical defect at dry versus wet states. Consistent with our hypothesis, the peak fixation force measured for the PELA and HA-PELA scaffolds increased 6-fold and 15-fold upon hydration, respectively. Furthermore, we showed that the low-fouling 3D PELA inhibited the attachment of NIH3T3 fibroblasts or bone marrow stromal cells while the HA-PELA readily supported cellular attachment and osteogenic differentiation. Finally, we demonstrated the feasibility of rapid prototyping biphasic PELA/HA-PELA scaffolds for potential guided bone regeneration where an osteoconductive scaffold interior encouraging osteointegration and a nonadhesive surface discouraging fibrous tissue encapsulation is desired. This work demonstrated that by combining facile and readily translatable rapid prototyping approaches with unique biomaterial designs, biodegradable composite scaffolds with well-controlled macroporosities, spatially defined biological microenvironment, and useful handling characteristics can be developed.
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Affiliation(s)
- Artem B Kutikov
- 1 Department of Orthopedics & Physical Rehabilitation, University of Massachusetts Medical School , Worcester, Massachusetts
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131
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Knight DK, Gillies ER, Mequanint K. Biomimetic L-aspartic acid-derived functional poly(ester amide)s for vascular tissue engineering. Acta Biomater 2014; 10:3484-96. [PMID: 24769110 DOI: 10.1016/j.actbio.2014.04.014] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 04/04/2014] [Accepted: 04/15/2014] [Indexed: 12/17/2022]
Abstract
Functionalization of polymeric biomaterials permits the conjugation of cell signaling molecules capable of directing cell function. In this study, l-phenylalanine and l-aspartic acid were used to synthesize poly(ester amide)s (PEAs) with pendant carboxylic acid groups through an interfacial polycondensation approach. Human coronary artery smooth muscle cell (HCASMC) attachment, spreading and proliferation was observed on all PEA films. Vinculin expression at the cell periphery suggested that HCASMCs formed focal adhesions on the functional PEAs, while the absence of smooth muscle α-actin (SMαA) expression implied the cells adopted a proliferative phenotype. The PEAs were also electrospun to yield nanoscale three-dimensional (3-D) scaffolds with average fiber diameters ranging from 130 to 294nm. Immunoblotting studies suggested a potential increase in SMαA and calponin expression from HCASMCs cultured on 3-D fibrous scaffolds when compared to 2-D films. X-ray photoelectron spectroscopy and immunofluorescence demonstrated the conjugation of transforming growth factor-β1 to the surface of the functional PEA through the pendant carboxylic acid groups. Taken together, this study demonstrates that PEAs containing aspartic acid are viable biomaterials for further investigation in vascular tissue engineering.
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Affiliation(s)
- Darryl K Knight
- Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, Ontario N6A 5B9, Canada
| | - Elizabeth R Gillies
- Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, Ontario N6A 5B9, Canada; The Graduate Program of Biomedical Engineering, The University of Western Ontario, London, Ontario N6A 5B9, Canada; Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada.
| | - Kibret Mequanint
- Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, Ontario N6A 5B9, Canada; The Graduate Program of Biomedical Engineering, The University of Western Ontario, London, Ontario N6A 5B9, Canada.
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132
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Effect of thickness of HA-coating on microporous silk scaffolds using alternate soaking technology. BIOMED RESEARCH INTERNATIONAL 2014; 2014:637821. [PMID: 25093176 PMCID: PMC4100396 DOI: 10.1155/2014/637821] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 06/04/2014] [Indexed: 11/18/2022]
Abstract
Hydroxyapatite (HA) can be coated on various materials surface and has the function of osteogenicity. Microporous silk scaffold has excellent biocompatibility. In this study, alternate soaking technology was used to coat HA on microporous silk scaffolds. However, the cell proliferation was found to decrease with the increasing thickness (cycles of soaking) of HA-coating. This study aims to determine the best thickness (cycles of soaking) of HA-coating on microporous silk scaffolds. The SEM observation showed that group with one cycle of alternate soaking (1C-HA) has the most optimal porosity like non-HA-modified microporous silk scaffolds. The proliferation of osteoblasts has no significant difference between noncoated HA (N-HA) and 1C-HA groups, which are both significantly higher than those in two cycles of soaking (2C-HA) and three cycles of soaking (3C-HA) groups. The transcription levels of specific genes (runx2 and osteonectin) in osteoblasts of 1C-HA group were significantly higher than those of N-HA group. Moreover, the levels showed no significant difference among 1C-HA, 2C-HA, and 3C-HA groups. In conclusion, microporous silk scaffold with 1 cycle of HA-coating can combine the biocompatibility of silk and osteogenicity of HA.
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133
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Bicomponent electrospinning to fabricate three-dimensional hydrogel-hybrid nanofibrous scaffolds with spatial fiber tortuosity. Biomed Microdevices 2014; 16:793-804. [DOI: 10.1007/s10544-014-9883-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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134
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Huri PY, Ozilgen BA, Hutton DL, Grayson WL. Scaffold pore size modulates in vitro osteogenesis of human adipose-derived stem/stromal cells. Biomed Mater 2014; 9:045003. [PMID: 24945873 DOI: 10.1088/1748-6041/9/4/045003] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Trabecular bone has an interconnected porous structure, which influences cellular responses, biochemical transport and mechanical strength. Appropriately mimicking this structural organization in biomaterial scaffolds can facilitate more robust bone tissue regeneration and integration by providing a native microenvironment to the cells. This study examined the effect of pore size on human adipose-derived stem/stromal cell (ASC) osteogenesis within poly(ε-caprolactone) (PCL) scaffolds. Scaffold pore size was controlled by porogen leaching of custom-made paraffin particles with three different size ranges: P200 (< 500 µm), P500 (500-1000 µm), and P1000 (1000-1500 µm). Scaffolds produced by leaching these particles exhibited highly interconnected pores and rough surface structures that were favorable for cell attachment and ingrowth. The osteogenic response of ASCs was evaluated following 3 weeks of in vitro culture using biochemical (ALP, Ca(2+)/DNA content), mechanical (compression test) and histological (H&E and von Kossa staining) analyses. It was observed that while the total number of cells was similar for all scaffolds, the cell distributions and osteogenic properties were affected by the scaffold pore size. ASCs were able to bridge smaller pores and grow uniformly within these scaffolds (P200) while they grew as a layer along the periphery of the largest pores (P1000). The cell-biomaterial interactions specific to the latter case led to enhanced osteogenic responses. The ALP activity and Ca(2+) deposition were doubled in P1000 scaffolds as compared to P200 scaffolds. A significant difference was observed between the compressive strength of unseeded and seeded P1000 scaffolds. Therefore, we demonstrated that the use of scaffolds with pores that are in the range of 1 mm enhances in vitro ASC osteogenesis, which may improve their performance in engineered bone substitutes.
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Affiliation(s)
- Pinar Yilgor Huri
- Department of Biomedical Engineering, Translational Tissue Engineering Center, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
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135
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Nanofibrous chitosan-polyethylene oxide engineered scaffolds: a comparative study between simulated structural characteristics and cells viability. BIOMED RESEARCH INTERNATIONAL 2014; 2014:438065. [PMID: 24995296 PMCID: PMC4065727 DOI: 10.1155/2014/438065] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/25/2013] [Revised: 04/07/2014] [Accepted: 05/08/2014] [Indexed: 11/17/2022]
Abstract
3D nanofibrous chitosan-polyethylene oxide (PEO) scaffolds were fabricated by electrospinning at different processing parameters. The structural characteristics, such as pore size, overall porosity, pore interconnectivity, and scaffold percolative efficiency (SPE), were simulated by a robust image analysis. Mouse fibroblast cells (L929) were cultured in RPMI for 2 days in the presence of various samples of nanofibrous chitosan/PEO scaffolds. Cell attachments and corresponding mean viability were enhanced from 50% to 110% compared to that belonging to a control even at packed morphologies of scaffolds constituted from pores with nanoscale diameter. To elucidate the correlation between structural characteristics within the depth of the scaffolds' profile and cell viability, a comparative analysis was proposed. This analysis revealed that larger fiber diameters and pore sizes can enhance cell viability. On the contrary, increasing the other structural elements such as overall porosity and interconnectivity due to a simultaneous reduction in fiber diameter and pore size through the electrospinning process can reduce the viability of cells. In addition, it was found that manipulation of the processing parameters in electrospinning can compensate for the effects of packed morphologies of nanofibrous scaffolds and can thus potentially improve the infiltration and viability of cells.
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136
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Evaluation of a biomimetic poly(ε-caprolactone)/β-tricalcium phosphate multispiral scaffold for bone tissue engineering:In vitroandin vivostudies. Biointerphases 2014; 9:029011. [DOI: 10.1116/1.4870781] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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137
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Sengupta D, Waldman SD, Li S. From In Vitro to In Situ Tissue Engineering. Ann Biomed Eng 2014; 42:1537-45. [DOI: 10.1007/s10439-014-1022-8] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Accepted: 04/29/2014] [Indexed: 01/09/2023]
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138
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Tas AC. The use of physiological solutions or media in calcium phosphate synthesis and processing. Acta Biomater 2014; 10:1771-92. [PMID: 24389317 DOI: 10.1016/j.actbio.2013.12.047] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 12/02/2013] [Accepted: 12/17/2013] [Indexed: 11/29/2022]
Abstract
This review examined the literature to spot uses, if any, of physiological solutions/media for the in situ synthesis of calcium phosphates (CaP) under processing conditions (i.e. temperature, pH, concentration of inorganic ions present in media) mimicking those prevalent in the human hard tissue environments. There happens to be a variety of aqueous solutions or media developed for different purposes; sometimes they have been named as physiological saline, isotonic solution, cell culture solution, metastable CaP solution, supersaturated calcification solution, simulated body fluid or even dialysate solution (for dialysis patients). Most of the time such solutions were not used as the aqueous medium to perform the biomimetic synthesis of calcium phosphates, and their use was usually limited to the in vitro testing of synthetic biomaterials. This review illustrates that only a limited number of research studies used physiological solutions or media such as Earle's balanced salt solution, Bachra et al. solutions or Tris-buffered simulated body fluid solution containing 27mM HCO3(-) for synthesizing CaP, and these studies have consistently reported the formation of X-ray-amorphous CaP nanopowders instead of Ap-CaP or stoichiometric hydroxyapatite (HA, Ca10(PO4)6(OH)2) at 37°C and pH 7.4. By relying on the published articles, this review highlights the significance of the use of aqueous solutions containing 0.8-1.5 mMMg(2+), 22-27mM HCO3(-), 142-145mM Na(+), 5-5.8mM K(+), 103-133mM Cl(-), 1.8-3.75mM Ca(2+), and 0.8-1.67mM HPO4(2-), which essentially mimic the composition and the overall ionic strength of the human extracellular fluid (ECF), in forming the nanospheres of X-ray-amorphous CaP.
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Affiliation(s)
- A Cuneyt Tas
- Department of Materials Science and Engineering, University of Illinois, Urbana, IL 61801, USA.
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139
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Sakina R, Ali M. An Appraisal of the Efficacy and Effectiveness of Nanoscaffolds Developed by Different Techniques for Bone Tissue Engineering Applications: Electrospinning A Paradigm Shift. ADVANCES IN POLYMER TECHNOLOGY 2014. [DOI: 10.1002/adv.21429] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Rabeil Sakina
- Department of Biomedical Engineering & Sciences; School of Mechanical and Manufacturing Engineering, National University of Sciences and Technology; Islamabad 44000 Pakistan
| | - Murtaza Ali
- Department of Biomedical Engineering & Sciences; School of Mechanical and Manufacturing Engineering, National University of Sciences and Technology; Islamabad 44000 Pakistan
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140
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Bonvallet PP, Culpepper BK, Bain JL, Schultz MJ, Thomas SJ, Bellis SL. Microporous dermal-like electrospun scaffolds promote accelerated skin regeneration. Tissue Eng Part A 2014; 20:2434-45. [PMID: 24568584 DOI: 10.1089/ten.tea.2013.0645] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The goal of this study was to synthesize skin substitutes that blend native extracellular matrix (ECM) molecules with synthetic polymers which have favorable mechanical properties. To this end, scaffolds were electrospun from collagen I (col) and poly(ɛ-caprolactone) (PCL), and then pores were introduced mechanically to promote fibroblast infiltration, and subsequent filling of the pores with ECM. A 70:30 col/PCL ratio was determined to provide optimal support for dermal fibroblast growth, and a pore diameter, 160 μm, was identified that enabled fibroblasts to infiltrate and fill pores with native matrix molecules, including fibronectin and collagen I. Mechanical testing of 70:30 col/PCL scaffolds with 160 μm pores revealed a tensile strength of 1.4 MPa, and the scaffolds also exhibited a low rate of contraction (<19%). Upon implantation, scaffolds should support epidermal regeneration; we, therefore, evaluated keratinocyte growth on fibroblast-embedded scaffolds with matrix-filled pores. Keratinocytes formed a stratified layer on the surface of fibroblast-remodeled scaffolds, and staining for cytokeratin 10 revealed terminally differentiated keratinocytes at the apical surface. When implanted, 70:30 col/PCL scaffolds degraded within 3-4 weeks, an optimal time frame for degradation in vivo. Finally, 70:30 col/PCL scaffolds with or without 160 μm pores were implanted into full-thickness critical-sized skin defects. Relative to nonporous scaffolds or sham wounds, scaffolds with 160 μm pores induced accelerated wound closure, and stimulated regeneration of healthy dermal tissue, evidenced by a more normal-appearing matrix architecture, blood vessel in-growth, and hair follicle development. Collectively, these results suggest that microporous electrospun scaffolds are effective substrates for skin regeneration.
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Affiliation(s)
- Paul P Bonvallet
- 1 Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham , Birmingham, Alabama
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141
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Walthers CM, Nazemi AK, Patel SL, Wu BM, Dunn JCY. The effect of scaffold macroporosity on angiogenesis and cell survival in tissue-engineered smooth muscle. Biomaterials 2014; 35:5129-37. [PMID: 24695092 DOI: 10.1016/j.biomaterials.2014.03.025] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Accepted: 03/12/2014] [Indexed: 11/19/2022]
Abstract
Angiogenesis and survival of cells within thick scaffolds is a major concern in tissue engineering. The purpose of this study is to increase the survival of intestinal smooth muscle cells (SMCs) in implanted tissue-engineered constructs. We incorporated 250-μm pores in multi-layered, electrospun scaffolds with a macroporosity ranging from 15% to 25% to facilitate angiogenesis. The survival of green fluorescent protein (GFP)-expressing SMCs was evaluated after 2 weeks of implantation. Whereas host cellular infiltration was similar in scaffolds with different macroporosities, blood vessel development increased with increasing macroporosity. Scaffolds with 25% macropores had the most GFP-expressing SMCs, which correlated with the highest degree of angiogenesis over 1 mm away from the outermost layer. The 25% macroporous group exceeded a critical threshold of macropore connectivity, accelerating angiogenesis and improving implanted cell survival in a tissue-engineered smooth muscle construct.
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Affiliation(s)
| | - Alireza K Nazemi
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA
| | - Shilpy L Patel
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA
| | - Benjamin M Wu
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA; Department of Advanced Prosthodontics, Biomaterials, and Hospital Dentistry, University of California, Los Angeles, CA, USA
| | - James C Y Dunn
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA; Department of Surgery, University of California, Los Angeles, CA, USA.
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142
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Lu W, Sun J, Jiang X. Recent advances in electrospinning technology and biomedical applications of electrospun fibers. J Mater Chem B 2014; 2:2369-2380. [PMID: 32261409 DOI: 10.1039/c3tb21478h] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electrospinning technology underwent rapid development in recent years, which can be used for fabricating electrospun fibers with different morphologies and multidimensional structures. These fibers are widely applied in medical diagnosis, tissue engineering, replica molding and other applications. Here we review the recent advances in the electrospinning technology, especially technical progress in fabricating electrospun fibers and assemblies with multidimensional structures, and the biomedical applications of these fibers.
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Affiliation(s)
- Wenjing Lu
- Beijing Engineering Research Center for BioNanotechnology & Key Lab for Biological Effects of Nanomaterials and Nanosafety, National Center for NanoScience and Technology, #11 Beiyitiao, ZhongGuanCun, Beijing, P. R. China.
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143
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Moosavifar MJ, Moztarzadeh F, Azami M. Preparation of Mineralized Electrospun Fibers as a Biomimetic Nanocomposite. INT J POLYM MATER PO 2014. [DOI: 10.1080/00914037.2013.854229] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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144
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Abstract
Osteochondral defects are difficult to treat because the articular cartilage and the subchondral bone have dissimilar characteristics and abilities to regenerate. Bioinspired scaffolds are designed to mimic structural and biological cues of the native osteochondral unit, supporting both cartilaginous and subchondral bone repair and the integration of the newly formed osteochondral matrix with the surrounding tissues. The aim of this review is to outline fundamental requirements and strategies for the development of biomimetic scaffolds reproducing the unique and multifaceted anatomical structure of the osteochondral unit. Recent progress in preclinical animal studies using bilayer and multilayer scaffolds, together with continuous gradient scaffolds will be discussed and placed in a translational perspective with data emerging from their clinical application to treat osteochondral defects in patients.
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Affiliation(s)
- Silvia Lopa
- 1 Cell and Tissue Engineering Laboratory, IRCCS Galeazzi Orthopaedic Institute , Milan, Italy
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145
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Zhang X, Chang W, Lee P, Wang Y, Yang M, Li J, Kumbar SG, Yu X. Polymer-ceramic spiral structured scaffolds for bone tissue engineering: effect of hydroxyapatite composition on human fetal osteoblasts. PLoS One 2014; 9:e85871. [PMID: 24475056 PMCID: PMC3903490 DOI: 10.1371/journal.pone.0085871] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Accepted: 12/06/2013] [Indexed: 12/28/2022] Open
Abstract
For successful bone tissue engineering, a scaffold needs to be osteoconductive, porous, and biodegradable, thus able to support attachment and proliferation of bone cells and guide bone formation. Recently, hydroxyapatites (HA), a major inorganic component of natural bone, and biodegrade polymers have drawn much attention as bone scaffolds. The present study was designed to investigate whether the bone regenerative properties of nano-HA/polycaprolactone (PCL) spiral scaffolds are augmented in an HA dose dependent manner, thereby establishing a suitable composition as a bone formation material. Nano-HA/PCL spiral scaffolds were prepared with different weight ratios of HA and PCL, while porosity was introduced by a modified salt leaching technique. Human fetal osteoblasts (hFOBs) were cultured on the nano-HA/PCL spiral scaffolds up to 14 days. Cellular responses in terms of cell adhesion, viability, proliferation, differentiation, and the expression of bone-related genes were investigated. These scaffolds supported hFOBs adhesion, viability and proliferation. Cell proliferation trend was quite similar on polymer-ceramic and neat polymer spiral scaffolds on days 1, 7, and 14. However, the significantly increased amount of alkaline phosphatase (ALP) activity and mineralized matrix synthesis was evident on the nano-HA/PCL spiral scaffolds. The HA composition in the scaffolds showed a significant effect on ALP and mineralization. Bone phenotypic markers such as bone sialoprotein (BSP), osteonectin (ON), osteocalcin (OC), and type I collagen (Col-1) were semi-quantitatively estimated by reverse transcriptase polymerase chain reaction analysis. All of these results suggested the osteoconductive characteristics of HA/PCL nanocomposite and cell maturation were HA dose dependent. For instance, HA∶PCL = 1∶4 group showed significantly higher ALP mineralization and elevated levels of BSP, ON, OC and Col-I expression as compared other lower or higher ceramic ratios. Amongst the different nano-HA/PCL spiral scaffolds, the 1∶4 weight ratio of HA and PCL is shown to be the most optimal composition for bone tissue regeneration.
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Affiliation(s)
- Xiaojun Zhang
- Department of Chemistry, Chemical Biology, and Biomedical Engineering, Stevens Institute of Technology, Hoboken, New Jersey, United States of America
- Department of Physics and Mathematics, School of Biomedical Engineering, Fourth Military Medical University, Xi'an, Shaanxi, People's Republic of China
| | - Wei Chang
- Department of Chemistry, Chemical Biology, and Biomedical Engineering, Stevens Institute of Technology, Hoboken, New Jersey, United States of America
| | - Paul Lee
- Department of Chemistry, Chemical Biology, and Biomedical Engineering, Stevens Institute of Technology, Hoboken, New Jersey, United States of America
| | - Yuhao Wang
- Department of Chemistry, Chemical Biology, and Biomedical Engineering, Stevens Institute of Technology, Hoboken, New Jersey, United States of America
| | - Min Yang
- Department of Chemistry, Chemical Biology, and Biomedical Engineering, Stevens Institute of Technology, Hoboken, New Jersey, United States of America
| | - Jun Li
- Department of Chemistry, Chemical Biology, and Biomedical Engineering, Stevens Institute of Technology, Hoboken, New Jersey, United States of America
| | - Sangamesh G. Kumbar
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, Connecticut, United States of America
| | - Xiaojun Yu
- Department of Chemistry, Chemical Biology, and Biomedical Engineering, Stevens Institute of Technology, Hoboken, New Jersey, United States of America
- * E-mail:
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146
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Wang X, Sang L, Wei Z, Zhai L, Wang H, Song K, Qi M. Facile preparation and cytocompatibility of poly(lactic acid)/poly(3-hydroxybutyrate-co-4-hydroxybutyrate) hybrid fibrous scaffolds. POLYM ENG SCI 2014. [DOI: 10.1002/pen.23851] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xinhui Wang
- School of Materials Science and Engineering; Dalian University of Technology; Dalian 116024 China
| | - Lin Sang
- School of Materials Science and Engineering; Dalian University of Technology; Dalian 116024 China
| | - Zhiyong Wei
- Department of Polymer Science and Materials; Dalian University of Technology; Dalian 116024 China
| | - Lijie Zhai
- First Affiliated Hospital of Dalian Medical University; Dalian 116011 China
| | - Hong Wang
- First Affiliated Hospital of Dalian Medical University; Dalian 116011 China
| | - Kedong Song
- Dalian R&D Center for Stem Cell and Tissue Engineering; State Key Laboratory of Fine Chemicals, Dalian University of Technology; Dalian 116024 China
| | - Min Qi
- School of Materials Science and Engineering; Dalian University of Technology; Dalian 116024 China
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147
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Kim SG, Jeong JH, Che X, Park YT, Lee SW, Jung ES, Choe S, Choi JY. Reconstruction of radial bone defect using gelatin sponge and a BMP-2 combination graft. BMB Rep 2014; 46:328-33. [PMID: 23790977 PMCID: PMC4133902 DOI: 10.5483/bmbrep.2013.46.6.231] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Many bioactive molecules like recombinant human bone morphogenetic protein 2 (rhBMP-2) have been developed for mineralized bone grafts, for which proper scaffolds are necessary to successfully apply the bioactive molecules. In this study, we tested the osteogenic efficacy of rhBMP-2 produced in-house in combination with gelatin sponge as the scaffold carrier in a rabbit radial defect model. The efficacy of the rhBMP-2 was determined by alkaline phosphatase activity assay of C2C12 cells. Two groups of ten rabbits each were treated with rhBMP-2/gelatin sponge, or gelatin sponge only. At 4 weeks, rhBMP-2/gelatin sponge grafts showed more bone regeneration than gelatin sponge grafts, as determined by X-ray radiography, micro-computed tomography, and histological analyses. At 8 weeks, rhBMP-2/gelatin sponge grafts exerted much stronger osteogenic effects. The study demonstrates the improved osteogenic efficacy of the rhBMP-2/gelatin sponge grafts in a rabbit radial bone defect model acting as a bone-inductive material. [BMB Reports 2013; 46(6): 328-333]
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Affiliation(s)
- Seong-Gon Kim
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung-Wonju National University, Gangneung 210-702, Korea
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148
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Chen SH, Chang Y, Lee KR, Lai JY. A three-dimensional dual-layer nano/microfibrous structure of electrospun chitosan/poly(d,l-lactide) membrane for the improvement of cytocompatibility. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2013.08.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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149
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Jin L, Feng ZQ, Wang T, Ren Z, Ma S, Wu J, Sun D. A novel fluffy hydroxylapatite fiber scaffold with deep interconnected pores designed for three-dimensional cell culture. J Mater Chem B 2014; 2:129-136. [DOI: 10.1039/c3tb21219j] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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150
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Silva NHCS, Vilela C, Marrucho IM, Freire CSR, Pascoal Neto C, Silvestre AJD. Protein-based materials: from sources to innovative sustainable materials for biomedical applications. J Mater Chem B 2014; 2:3715-3740. [DOI: 10.1039/c4tb00168k] [Citation(s) in RCA: 113] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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