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Yin S, Cao Y. Hydrogels for Large-Scale Expansion of Stem Cells. Acta Biomater 2021; 128:1-20. [PMID: 33746032 DOI: 10.1016/j.actbio.2021.03.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/25/2021] [Accepted: 03/10/2021] [Indexed: 12/18/2022]
Abstract
Stem cells demonstrate considerable promise for various preclinical and clinical applications, including drug screening, disease treatments, and regenerative medicine. Producing high-quality and large amounts of stem cells is in demand for these applications. Despite challenges, as hydrogel-based cell culture technology has developed, tremendous progress has been made in stem cell expansion and directed differentiation. Hydrogels are soft materials with abundant water. Many hydrogel properties, including biodegradability, mechanical strength, and porosity, have been shown to play essential roles in regulating stem cell proliferation and differentiation. The biochemical and physical properties of hydrogels can be specifically tailored to mimic the native microenvironment that various stem cells reside in vivo. A few hydrogel-based systems have been developed for successful stem cell cultures and expansion in vitro. In this review, we summarize various types of hydrogels that have been designed to effectively enhance the proliferation of hematopoietic stem cells (HSCs), mesenchymal stem/stromal cells (MSCs), and pluripotent stem cells (PSCs), respectively. According to each stem cell type's preference, we also discuss strategies for fabricating hydrogels with biochemical and mechanical cues and other characteristics representing microenvironments of stem cells in vivo. STATEMENT OF SIGNIFICANCE: In this review article we summarize current progress on the construction of hydrogel systems for the culture and expansion of various stem cells, including hematopoietic stem cells (HSCs), mesenchymal stem/stromal cells (MSCs), and pluripotent stem cells (PSCs). The Significance includes: (1) Provide detailed discussion on the stem cell niches that should be considered for stem cell in vitro expansion. (2) Summarize various strategies to construct hydrogels that can largely recapture the microenvironment of native stem cells. (3) Suggest a few future directions that can be implemented to improve current in vitro stem cell expansion systems.
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Affiliation(s)
- Sheng Yin
- National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, China; Chemistry and Biomedicine innovation center, Nanjing University, Nanjing, 210093, China; Institute for Brain Sciences, Nanjing University, Nanjing, 210093, China; Shenzhen Research Institute of Nanjing University, Shenzhen, China, 518057
| | - Yi Cao
- National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, China; Chemistry and Biomedicine innovation center, Nanjing University, Nanjing, 210093, China; Institute for Brain Sciences, Nanjing University, Nanjing, 210093, China; Shenzhen Research Institute of Nanjing University, Shenzhen, China, 518057.
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Assessment of a PCL-3D Printing-Dental Pulp Stem Cells Triplet for Bone Engineering: An In Vitro Study. Polymers (Basel) 2021; 13:polym13071154. [PMID: 33916576 PMCID: PMC8038447 DOI: 10.3390/polym13071154] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 03/29/2021] [Accepted: 04/01/2021] [Indexed: 12/18/2022] Open
Abstract
The search of suitable combinations of stem cells, biomaterials and scaffolds manufacturing methods have become a major focus of research for bone engineering. The aim of this study was to test the potential of dental pulp stem cells to attach, proliferate, mineralize and differentiate on 3D printed polycaprolactone (PCL) scaffolds. A 100% pure Mw: 84,500 ± 1000 PCL was selected. 5 × 10 × 5 mm3 parallelepiped scaffolds were designed as a wood-pilled structure composed of 20 layers of 250 μm in height, in a non-alternate order ([0,0,0,90,90,90°]). 3D printing was made at 170 °C. Swine dental pulp stem cells (DPSCs) were extracted from lower lateral incisors of swine and cultivated until the cells reached 80% confluence. The third passage was used for seeding on the scaffolds. Phenotype of cells was determined by flow Cytometry. Live and dead, Alamar blue™, von Kossa and alizarin red staining assays were performed. Scaffolds with 290 + 30 μm strand diameter, 938 ± 80 μm pores in the axial direction and 689 ± 13 μm pores in the lateral direction were manufactured. Together, cell viability tests, von Kossa and Alizarin red staining indicate the ability of the printed scaffolds to support DPSCs attachment, proliferation and enable differentiation followed by mineralization. The selected material-processing technique-cell line (PCL-3D printing-DPSCs) triplet can be though to be used for further modelling and preclinical experiments in bone engineering studies.
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Zhang Y, Pan X, Shi Z, Cai H, Gao Y, Zhang W. Sustained release of stem cell factor in a double network hydrogel for ex vivo culture of cord blood-derived CD34 + cells. Cell Prolif 2018; 51:e12407. [PMID: 29143396 PMCID: PMC6528907 DOI: 10.1111/cpr.12407] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Accepted: 10/13/2017] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVES Stem cell factor (SCF) is considered as a commonly indispensable cytokine for proliferation of haematopoietic stem cells (HSCs), which is used in large dosages during ex vivo culture. The work presented here aimed to reduce the consumption of SCF by sustained release but still support cells proliferation and maintain the multipotency of HSCs. MATERIALS AND METHODS Stem cell factor was physically encapsulated within a hyaluronic acid/gelatin double network (HGDN) hydrogel to achieve a slow release rate. CD34+ cells were cultured within the SCF-loaded HGDN hydrogel for 14 days. The cell number, phenotype and functional capacity were investigated after culture. RESULTS The HGDN hydrogels had desirable properties and encapsulated SCF kept being released for more than 6 days. SCF remained the native bioactivity, and the proliferation of HSCs within the SCF-loaded HGDN hydrogel was not affected, although the consumption of SCF was only a quarter in comparison with the conventional culture. Moreover, CD34+ cells harvested from the SCF-loaded HGDN hydrogels generated more multipotent colony-forming units (CFU-GEMM). CONCLUSION The data suggested that the SCF-loaded HGDN hydrogel could support ex vivo culture of HSCs, thus providing a cost-effective culture protocol for HSCs.
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Affiliation(s)
- Yuanhao Zhang
- State Key Laboratory of Bioreactor EngineeringShanghai Key Laboratory of Functional Materials ChemistryEast China University of Science and TechnologyShanghai200237China
| | - Xiuwei Pan
- State Key Laboratory of Bioreactor EngineeringShanghai Key Laboratory of Functional Materials ChemistryEast China University of Science and TechnologyShanghai200237China
| | - Zhen Shi
- State Key Laboratory of Bioreactor EngineeringShanghai Key Laboratory of Functional Materials ChemistryEast China University of Science and TechnologyShanghai200237China
| | - Haibo Cai
- State Key Laboratory of Bioreactor EngineeringShanghai Key Laboratory of Functional Materials ChemistryEast China University of Science and TechnologyShanghai200237China
| | - Yun Gao
- State Key Laboratory of Bioreactor EngineeringShanghai Key Laboratory of Functional Materials ChemistryEast China University of Science and TechnologyShanghai200237China
| | - Weian Zhang
- State Key Laboratory of Bioreactor EngineeringShanghai Key Laboratory of Functional Materials ChemistryEast China University of Science and TechnologyShanghai200237China
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Pan X, Sun Q, Zhang Y, Cai H, Gao Y, Shen Y, Zhang W. Biomimetic Macroporous PCL Scaffolds for Ex Vivo Expansion of Cord Blood-Derived CD34 + Cells with Feeder Cells Support. Macromol Biosci 2017; 17. [PMID: 28544462 DOI: 10.1002/mabi.201700054] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 04/24/2017] [Indexed: 01/10/2023]
Abstract
Ex vivo expansion of hematopoietic stem cells (HSCs) with most current methods can hardly satisfy clinical application requirement. While in vivo, HSCs efficiently self-renew in niche where they interact with 3D extracellular matrix and stromal cells. Therefore, co-cultures of CD34+ cells and mesenchyme stem cells derived from human amniotic membrane (hAMSCs) on the basis of biomimetic macroporous three-dimensional (3D) poly(ε-caprolactone) (PCL) scaffolds are developed, where scaffolds and hAMSCs are applied to mimic structural and cellular microenvironment of HSCs. The influence of scaffolds, feeder cells, and contact manners on expansion and stemness maintenance of CD34+ cells is investigated in this protocol. Biomimetic scaffolds-dependent co-cultures of CD34+ cells and hAMSCs can effectively promote the expansion of CD34+ cells; meanwhile, indirect contact is superior to direct contact. The combination of biomimetic scaffolds and hAMSCs represents a new strategy for achieving clinical-scale ex vivo expansion of CD34+ cells.
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Affiliation(s)
- Xiuwei Pan
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of Functional Materials Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Qiong Sun
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of Functional Materials Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Yuanhao Zhang
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of Functional Materials Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Haibo Cai
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of Functional Materials Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Yun Gao
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of Functional Materials Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Yongjia Shen
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of Functional Materials Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Weian Zhang
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of Functional Materials Chemistry, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
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Pan X, Sun Q, Cai H, Gao Y, Tan W, Zhang W. Encapsulated feeder cells within alginate beads for ex vivo expansion of cord blood-derived CD34+ cells. Biomater Sci 2016; 4:1441-53. [DOI: 10.1039/c6bm00191b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A co-culture system based on encapsulated feeder cells within alginate beads was developed through optimizing the detailed aspects of the cell culture system to expand CD34-positive (CD34+) cells ex vivo.
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Affiliation(s)
- Xiuwei Pan
- State Key Laboratory of Bioreactor Engineering
- Shanghai Key Laboratory of Functional Materials Chemistry
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Qiong Sun
- State Key Laboratory of Bioreactor Engineering
- Shanghai Key Laboratory of Functional Materials Chemistry
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Haibo Cai
- State Key Laboratory of Bioreactor Engineering
- Shanghai Key Laboratory of Functional Materials Chemistry
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Yun Gao
- State Key Laboratory of Bioreactor Engineering
- Shanghai Key Laboratory of Functional Materials Chemistry
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Wensong Tan
- State Key Laboratory of Bioreactor Engineering
- Shanghai Key Laboratory of Functional Materials Chemistry
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Weian Zhang
- State Key Laboratory of Bioreactor Engineering
- Shanghai Key Laboratory of Functional Materials Chemistry
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
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Joseph M, Das M, Kanji S, Lu J, Aggarwal R, Chakroborty D, Sarkar C, Yu H, Mao HQ, Basu S, Pompili VJ, Das H. Retention of stemness and vasculogenic potential of human umbilical cord blood stem cells after repeated expansions on PES-nanofiber matrices. Biomaterials 2014; 35:8566-75. [PMID: 25002260 PMCID: PMC4131920 DOI: 10.1016/j.biomaterials.2014.06.037] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 06/19/2014] [Indexed: 12/26/2022]
Abstract
Despite recent advances in cardiovascular medicine, ischemic diseases remain a major cause of morbidity and mortality. Although stem cell-based therapies for the treatment of ischemic diseases show great promise, limited availability of biologically functional stem cells mired the application of stem cell-based therapies. Previously, we reported a PES-nanofiber based ex vivo stem cell expansion technology, which supports expansion of human umbilical cord blood (UCB)-derived CD133(+)/CD34(+) progenitor cells ∼225 fold. Herein, we show that using similar technology and subsequent re-expansion methods, we can achieve ∼5 million-fold yields within 24 days of the initial seeding. Interestingly, stem cell phenotype was preserved during the course of the multiple expansions. The high level of the stem cell homing receptor, CXCR4 was expressed in the primary expansion cells, and was maintained throughout the course of re-expansions. In addition, re-expanded cells preserved their multi-potential differential capabilities in vitro, such as, endothelial and smooth muscle lineages. Moreover, biological functionality of the re-expanded cells was preserved and was confirmed by a murine hind limb ischemia model for revascularization. These cells could also be genetically modified for enhanced vasculogenesis. Immunohistochemical evidences support enhanced expression of angiogenic factors responsible for this enhanced neovascularization. These data further confirms that nanofiber-based ex-vivo expansion technology can generate sufficient numbers of biologically functional stem cells for potential clinical applications.
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Affiliation(s)
- Matthew Joseph
- Stem Cell Research Laboratory, Davis Heart and Lung Research Institute, Wexner Medical Center at The Ohio State University, Columbus, OH, USA
| | - Manjusri Das
- Stem Cell Research Laboratory, Davis Heart and Lung Research Institute, Wexner Medical Center at The Ohio State University, Columbus, OH, USA
| | - Suman Kanji
- Stem Cell Research Laboratory, Davis Heart and Lung Research Institute, Wexner Medical Center at The Ohio State University, Columbus, OH, USA
| | - Jingwei Lu
- Stem Cell Research Laboratory, Davis Heart and Lung Research Institute, Wexner Medical Center at The Ohio State University, Columbus, OH, USA
| | - Reeva Aggarwal
- Stem Cell Research Laboratory, Davis Heart and Lung Research Institute, Wexner Medical Center at The Ohio State University, Columbus, OH, USA
| | - Debanjan Chakroborty
- Department of Pathology, Arthur G. James Cancer Hospital and Richard J. Solove Research Institute, The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - Chandrani Sarkar
- Department of Pathology, Arthur G. James Cancer Hospital and Richard J. Solove Research Institute, The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - Hongmei Yu
- Department of Pathology, Arthur G. James Cancer Hospital and Richard J. Solove Research Institute, The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - Hai-Quan Mao
- Department of Materials Science and Engineering & Whitaker Biomedical Engineering Institute, Johns Hopkins University, Baltimore, MD, USA
| | - Sujit Basu
- Department of Pathology, Arthur G. James Cancer Hospital and Richard J. Solove Research Institute, The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - Vincent J Pompili
- Stem Cell Research Laboratory, Davis Heart and Lung Research Institute, Wexner Medical Center at The Ohio State University, Columbus, OH, USA
| | - Hiranmoy Das
- Stem Cell Research Laboratory, Davis Heart and Lung Research Institute, Wexner Medical Center at The Ohio State University, Columbus, OH, USA.
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Chen DC, Chen LY, Ling QD, Wu MH, Wang CT, Suresh Kumar S, Chang Y, Munusamy MA, Alarfajj AA, Wang HC, Hsu ST, Higuchi A. Purification of human adipose-derived stem cells from fat tissues using PLGA/silk screen hybrid membranes. Biomaterials 2014; 35:4278-87. [DOI: 10.1016/j.biomaterials.2014.02.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Accepted: 02/04/2014] [Indexed: 12/12/2022]
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Chhabra H, Gupta P, Verma PJ, Jadhav S, Bellare JR. Gelatin–PMVE/MA composite scaffold promotes expansion of embryonic stem cells. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 37:184-94. [DOI: 10.1016/j.msec.2013.12.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 11/16/2013] [Accepted: 12/25/2013] [Indexed: 12/13/2022]
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Kwon DY, Kwon JS, Shim SW, Park JH, Lee J, Kim JH, Kim WD, Kim MS. Preparation of three-dimensional scaffolds by using solid freeform fabrication and feasibility study of the scaffolds. J Mater Chem B 2014; 2:1689-1698. [DOI: 10.1039/c3tb21563f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kumar SS, Hsiao JH, Ling QD, Dulinska-Molak I, Chen G, Chang Y, Chang Y, Chen YH, Chen DC, Hsu ST, Higuchi A. The combined influence of substrate elasticity and surface-grafted molecules on the ex vivo expansion of hematopoietic stem and progenitor cells. Biomaterials 2013; 34:7632-44. [DOI: 10.1016/j.biomaterials.2013.07.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Accepted: 07/01/2013] [Indexed: 11/17/2022]
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Wu CH, Lee FK, Suresh Kumar S, Ling QD, Chang Y, Chang Y, Wang HC, Chen H, Chen DC, Hsu ST, Higuchi A. The isolation and differentiation of human adipose-derived stem cells using membrane filtration. Biomaterials 2012; 33:8228-39. [DOI: 10.1016/j.biomaterials.2012.08.027] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Accepted: 08/12/2012] [Indexed: 12/20/2022]
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Higuchi A, Ling QD, Hsu ST, Umezawa A. Biomimetic cell culture proteins as extracellular matrices for stem cell differentiation. Chem Rev 2012; 112:4507-40. [PMID: 22621236 DOI: 10.1021/cr3000169] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Akon Higuchi
- Department of Chemical and Materials Engineering, National Central University, Jhongli, Taoyuan, 32001 Taiwan.
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Chen LY, Chang Y, Shiao JS, Ling QD, Chang Y, Chen YH, Chen DC, Hsu ST, Lee HHC, Higuchi A. Effect of the surface density of nanosegments immobilized on culture dishes on ex vivo expansion of hematopoietic stem and progenitor cells from umbilical cord blood. Acta Biomater 2012; 8:1749-58. [PMID: 22281943 DOI: 10.1016/j.actbio.2012.01.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2011] [Revised: 11/25/2011] [Accepted: 01/04/2012] [Indexed: 01/23/2023]
Abstract
Umbilical cord blood (UCB) is an attractive source of hematopoietic stem and progenitor cells for hematopoietic stem cell (HSC) transplantation. However, the low number of HSCs obtainable from a single donor of UCB limits direct transplantation of UCB to the treatment of pediatric patients. In this study, we investigated the ex vivo expansion of HSCs cultured on biomaterials grafted with several nanosegments, i.e. polyamine, fibronectin, RGDS, and CS1 (EILDVPST), at several surface densities. No direct correlation was found between fold expansion of HSCs and physical parameters of the culture dishes, i.e. surface roughness and water contact angle of the culture dishes. However, a small amount of grafted amino groups, less than 0.8 residual μmol cm(-2), on the dishes was effective for the ex vivo expansion of HSCs. A high amount of grafted amino groups hindered the ex vivo expansion of HSCs on the dishes. HSCs cultured on dishes with a high concentration of CS1 (2.40 residual μmol cm(-2)) showed greater expansion of HSCs and more pluripotent colony-forming units (i.e. colony-forming unit-granulocyte, erythroid, macrophage, and megakaryocyte (CFU-GEMM)) than those on fibronectin-grafted and polyamine-grafted dishes. These data suggest that the specific interaction between HSCs and CS1 helps to maintain the pluripotency of HSCs during the ex vivo expansion of HSCs.
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Affiliation(s)
- Li-Ying Chen
- Department of Chemical and Materials Engineering, National Central University, Jhongli, Taoyuan 32001, Taiwan
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Lee BN, Kim DY, Kang HJ, Kwon JS, Park YH, Chun HJ, Kim JH, Lee HB, Min BH, Kim MS. In vivo biofunctionality comparison of different topographic PLLA scaffolds. J Biomed Mater Res A 2012; 100:1751-60. [PMID: 22467280 DOI: 10.1002/jbm.a.34135] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2011] [Revised: 01/29/2012] [Accepted: 01/31/2012] [Indexed: 12/17/2022]
Abstract
In this work, the in vivo biodegradation of, biocompatibility of, and host response to various topographic scaffolds were investigated. Randomly oriented fibrous poly(L-lactide) (PLLA) nanofibers were fabricated using the electrospinning technique. A PLLA scaffold was obtained by salt leaching. Both the electrospun PLLA nanofibers and the salt-leaching PLLA scaffolds formed three-dimensional pore structures. Cytotoxicity studies, in which rat muscle-derived stem cells (rMDSCs) were grown on electrospun PLLA nanofibers or the salt-leaching PLLA scaffolds, revealed that the rMDSCs cell count on the PLLA nanofibers was slightly higher than that on the salt-leaching PLLA scaffolds. An in vivo study was carried out by implanting the scaffolds subcutaneously into rats to test the biodegradation, biocompatibility, and host response at regular intervals over 0-4 weeks. The degradation of the PLLA nanofibers 1, 2, and 4 weeks after initial implantation was more extensive than that observed for the salt-leaching PLLA scaffolds. PLLA nanofibers seeded the growth of larger fibrous tissue masses due to in vivo cellular infiltration into the randomly oriented fibrillar structures of the PLLA nanofibers. In addition, the inflammatory cell accumulation in PLLA nanofibers was lower than that in the salt-leaching PLLA scaffolds. These results indicate that the electrospun PLLA nanofibers may serve as a good scaffold to elicit fibrous cellular infiltration, to minimize host response, and to enhance tissue-scaffold integration.
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Affiliation(s)
- Bit Na Lee
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea
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Chang Y, Chang Y, Higuchi A, Shih YJ, Li PT, Chen WY, Tsai EM, Hsiue GH. Bioadhesive control of plasma proteins and blood cells from umbilical cord blood onto the interface grafted with zwitterionic polymer brushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:4309-4317. [PMID: 22268580 DOI: 10.1021/la203504h] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this work, bioadhesive behavior of plasma proteins and blood cells from umbilical cord blood (UCB) onto zwitterionic poly(sulfobetaine methacrylate) (polySBMA) polymer brushes was studied. The surface coverage of polySBMA brushes on a hydrophobic polystyrene (PS) well plate with surface grafting weights ranging from 0.02 mg/cm(2) to 0.69 mg/cm(2) can be effectively controlled using the ozone pretreatment and thermal-induced radical graft-polymerization. The chemical composition, grafting structure, surface hydrophilicity, and hydration capability of prepared polySBMA brushes were determined to illustrate the correlations between grafting properties and blood compatibility of zwitterionic-grafted surfaces in contact with human UCB. The protein adsorption of fibrinogen in single-protein solutions and at complex medium of 100% UCB plasma onto different polySBMA brushes with different grafting coverage was measured by enzyme-linked immunosorbent assay (ELISA) with monoclonal antibodies. The grafting density of the zwitterionic brushes greatly affects the PS surface, thus controlling the adsorption of fibrinogen, the adhesion of platelets, and the preservation of hematopoietic stem and progenitor cells (HSPCs) in UCB. The results showed that PS surfaces grafted with polySBMA brushes possess controllable hydration properties through the binding of water molecules, regulating the bioadhesive and bioinert characteristics of plasma proteins and blood platelets in UCB. Interestingly, it was found that the polySBMA brushes with an optimized grafting weight of approximately 0.1 mg/cm(2) at physiologic temperatures show significant hydrated chain flexibility and balanced hydrophilicity to provide the best preservation capacity for HSPCs stored in 100% UCB solution for 2 weeks. This work suggests that, through controlling grafting structures, the hemocompatible nature of grafted zwitterionic polymer brushes makes them well suited to the molecular design of regulated bioadhesive interfaces for use in the preservation of HSPCs from human UCB.
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Affiliation(s)
- Yu Chang
- Kaohsiung Medical University Hospital, Kaohsiung Municipal Hsaio-Kang Hospital, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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In vivo biocompatibility study of electrospun chitosan microfiber for tissue engineering. Int J Mol Sci 2010; 11:4140-8. [PMID: 21152326 PMCID: PMC2996788 DOI: 10.3390/ijms11104140] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2010] [Revised: 10/19/2010] [Accepted: 10/19/2010] [Indexed: 11/24/2022] Open
Abstract
In this work, we examined the biocompatibility of electrospun chitosan microfibers as a scaffold. The chitosan microfibers showed a three-dimensional pore structure by SEM. The chitosan microfibers supported attachment and viability of rat muscle-derived stem cells (rMDSCs). Subcutaneous implantation of the chitosan microfibers demonstrated that implantation of rMDSCs containing chitosan microfibers induced lower host tissue responses with decreased macrophage accumulation than did the chitosan microfibers alone, probably due to the immunosuppression of the transplanted rMDSCs. Our results collectively show that chitosan microfibers could serve as a biocompatible in vivo scaffold for rMDSCs in rats.
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