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Barpour N, Ghorbani M, Baradaran B, Jodari-Mohammadpour Z, Nejati-Koshki K, Abdollahpour-Alitappeh M, Dabbaghi R, Gharibi T. Development of an injectable chitosan-based hydrogel containing nano-hydroxy-apatite and alendronate for MSC-based therapy. Int J Biol Macromol 2024; 261:129737. [PMID: 38286373 DOI: 10.1016/j.ijbiomac.2024.129737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 01/06/2024] [Accepted: 01/23/2024] [Indexed: 01/31/2024]
Abstract
BACKGROUND The combination of cells and biomaterials has become a powerful approach to regenerative medicine in recent years. Understanding the in-vitro interactions between cells and biomaterials is crucial for the success of regenerative medicine. AIM In this study, we developed an AD-pectin/chitosan/nano-crystalline cellulose scaffold with nano-hydroxy-apatite (n-HAP) and alendronate (ALN). The second step was to evaluate its effect on the immunomodulatory properties and biological behaviors of seeded adipose-derived mesenchymal stem cells (ADSCs) for bone tissue repair. MATERIAL AND METHOD After preparing and evaluating the characterization tests of the new combined n-HAP scaffold, we established different culture conditions to evaluate ADSC growth on this scaffold with or without ALN. The main assays were MTT assay, RT-PCR, and ELISA. RESULTS Our data regarding characterization tests (including SEM, TGA, FTIR, gelation time, swelling ratio, rheology and degradation tests) of ALN-loaded n-HAP scaffold showed the proper stability and good mechanical status of the scaffold. ADSC proliferation and viability increased in the presence of the scaffold compared with other conditions. Moreover, our data demonstrated increased gene expression and protein levels of anti-inflammatory TGF-β, HGF, and IDO cytokines in the presence of the ALN-loaded n-HAP scaffold, indicating the increased immunosuppressive activity of ADSCs in vitro. CONCLUSION This study demonstrates the promising abilities of the ALN-loaded n-HAP scaffold to increase the proliferation, viability, and immunomodulatory capacity of ADSCs, elucidating new aspects of cell-material interactions that can be used for bone tissue regeneration/repair, and paving the path of future research in developing new approaches for MSC- based therapy.
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Affiliation(s)
- Nesa Barpour
- Department of Genetics, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran; Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Marjan Ghorbani
- Nutrition Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Behzad Baradaran
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Kazem Nejati-Koshki
- Pharmaceutical Sciences Research Center, Ardabil University of Medical Sciences, Ardabil, Iran
| | | | - Rozhin Dabbaghi
- Department of Genetics, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran; Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Tohid Gharibi
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.
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Khazaei S, Soleimani M, Tafti SHA, Aghdam RM, Hojati Z. Improvement of Heart Function After Transplantation of Encapsulated Stem Cells Induced with miR-1/Myocd in Myocardial Infarction Model of Rat. Cell Transplant 2021; 30:9636897211048786. [PMID: 34606735 PMCID: PMC8493326 DOI: 10.1177/09636897211048786] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Cardiovascular disease is one of the most common causes of death worldwide. Mesenchymal stem cells (MSCs) are one of the most common sources in cell-based therapies in heart regeneration. There are several methods to differentiate MSCs into cardiac-like cells, such as gene induction. Moreover, using a three-dimensional (3D) culture, such as hydrogels increases efficiency of differentiation. In the current study, mouse adipose-derived MSCs were co-transduced with lentiviruses containing microRNA-1 (miR-1) and Myocardin (Myocd). Then, expression of cardiac markers, such as NK2 homeobox 5(Nkx2-5), GATA binding protein 4 (Gata4), and troponin T type 2 (Tnnt2) was investigated, at both gene and protein levels in two-dimensional (2D) culture and chitosan/collagen hydrogel (CS/CO) as a 3D culture. Additionally, after induction of myocardial infarction (MI) in rats, a patch containing the encapsulated induced cardiomyocytes (iCM/P) was implanted to MI zone. Subsequently, 30 days after MI induction, echocardiography, immunohistochemistry staining, and histological examination were performed to evaluate cardiac function. The results of quantitative real -time polymerase chain reaction (qRT-PCR) and immunocytochemistry showed that co-induction of miR-1 and Myocd in MSCs followed by 3D culture of transduced cells increased expression of cardiac markers. Besides, results of in vivo study implicated that heart function was improved in MI model of rats in iCM/P-treated group. The results suggested that miR-1/Myocd induction combined with encapsulation of transduced cells in CS/CO hydrogel increased efficiency of MSCs differentiation into iCMs and could improve heart function in MI model of rats after implantation.
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Affiliation(s)
- Samaneh Khazaei
- Department of Cell and Molecular Biology, Faculty of Biological Science and Technology, Isfahan University, Isfahan, Iran
| | - Masoud Soleimani
- Tissue Engineering and Hematology Department, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.,Tissue Engineering and Nanomedicine Research Center, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed Hossein Ahmadi Tafti
- Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran heart Center, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Zohreh Hojati
- Department of Cell and Molecular Biology, Faculty of Biological Science and Technology, Isfahan University, Isfahan, Iran
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Lopes M, Restani R, Carvalho MP, Correia I, Aguiar-Ricardo A, Bonifácio VD. Biocompatible oligo-oxazoline crosslinkers: Towards advanced chitosans for controlled dug release. REACT FUNCT POLYM 2021. [DOI: 10.1016/j.reactfunctpolym.2021.104846] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Xu Y, Shao B, Zeng X, Song Z, Jia M, Gong Z. Biofunctional Extracellular Matrix-Polycaprolactone-Hydroxyapatite Scaffold and Synovium Mesenchymal Stem Cells/Chondrocytes for Repairing Cartilage Defects. Tissue Eng Part A 2021; 27:1250-1263. [PMID: 33397197 DOI: 10.1089/ten.tea.2020.0245] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Articular cartilage defects and degeneration can be caused by multiple factors, and the current clinical treatment schemes for pathological changes are relatively limited. Engineered cartilage tissue represents an alternative therapy for repairing cartilage defects in regenerative medicine. The scaffold material is considered the framework of tissue engineering; thus, scaffold material selection plays a crucial role in the therapy outcome. Polycaprolactone (PCL)-hydroxyapatite (HA) has been applied as a scaffold material for bone and cartilage tissue engineering with nontoxic, harmless metabolites and proper physical properties. The extracellular matrix (ECM) is mainly composed of collagen and proteoglycan, as well as a large number of growth factors and cytokines, which provide a tissue-specific microenvironment for host cells. Adipose-derived stem cells are pluripotent stem cells, and transforming growth factor-β3 (TGF-β3) enables mesenchymal stem cells to promote ECM production. This study, via in vitro and in vivo experiments, elucidated that the synovium mesenchymal stem cells (SMSCs) + chondrocytes + ECM-PCL-HA repair system, which is constructed upon the ECM-PCL-HA scaffold material, exhibits an adequate chondrogenic ability and reparatory effect. Overall, ECM-PCL-HA can be defined as a biofunctional scaffold material. The SMSCs + chondrocytes + ECM-PCL-HA repair system showed good confluency between the new cartilage and the surface, as well as the interface of the adjacent host cartilage. Furthermore, the structure of new cartilage tissue is consistent with adjacency. Thus, it can be used as a preferred plan for articular cartilage defect repair.
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Affiliation(s)
- Yingjie Xu
- Oncological Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital (the Affiliated Stomatological Hospital) of Xinjiang Medical University, Xinjiang Uygur Autonomous Region Institute of Stomatology, Urumqi, China
| | - Bo Shao
- Oncological Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital (the Affiliated Stomatological Hospital) of Xinjiang Medical University, Xinjiang Uygur Autonomous Region Institute of Stomatology, Urumqi, China
| | - Xuemin Zeng
- Oncological Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital (the Affiliated Stomatological Hospital) of Xinjiang Medical University, Xinjiang Uygur Autonomous Region Institute of Stomatology, Urumqi, China
| | - Zhiqiang Song
- Oncological Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital (the Affiliated Stomatological Hospital) of Xinjiang Medical University, Xinjiang Uygur Autonomous Region Institute of Stomatology, Urumqi, China
| | - Mengying Jia
- Oncological Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital (the Affiliated Stomatological Hospital) of Xinjiang Medical University, Xinjiang Uygur Autonomous Region Institute of Stomatology, Urumqi, China
| | - Zhongcheng Gong
- Oncological Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital (the Affiliated Stomatological Hospital) of Xinjiang Medical University, Xinjiang Uygur Autonomous Region Institute of Stomatology, Urumqi, China
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5
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Jian Z, Zhuang T, Qinyu T, Liqing P, Kun L, Xujiang L, Diaodiao W, Zhen Y, Shuangpeng J, Xiang S, Jingxiang H, Shuyun L, Libo H, Peifu T, Qi Y, Quanyi G. 3D bioprinting of a biomimetic meniscal scaffold for application in tissue engineering. Bioact Mater 2020; 6:1711-1726. [PMID: 33313450 PMCID: PMC7711190 DOI: 10.1016/j.bioactmat.2020.11.027] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 11/13/2020] [Accepted: 11/19/2020] [Indexed: 12/22/2022] Open
Abstract
Appropriate biomimetic scaffolds created via 3D bioprinting are promising methods for treating damaged menisci. However, given the unique anatomical structure and complex stress environment of the meniscus, many studies have adopted various techniques to take full advantage of different materials, such as the printing combined with infusion, or electrospining, to chase the biomimetic meniscus, which makes the process complicated to some extent. Some researchers have tried to tackle the challenges only by 3D biopringting, while its alternative materials and models have been constrained. In this study, based on a multilayer biomimetic strategy, we optimized the preparation of meniscus-derived bioink, gelatin methacrylate (GelMA)/meniscal extracellular matrix (MECM), to take printability and cytocompatibility into account together. Subsequently, a customized 3D bioprinting system featuring a dual nozzle + multitemperature printing was used to integrate the advantages of polycaprolactone (PCL) and meniscal fibrocartilage chondrocytes (MFCs)-laden GelMA/MECM bioink to complete the biomimetic meniscal scaffold, which had the best biomimetic features in terms of morphology and components. Furthermore, cell viability, mechanics, biodegradation and tissue formation in vivo were performed to ensure that the scaffold had sufficient feasibility and functionality, thereby providing a reliable basis for its application in tissue engineering. We have optimized the preparation of meniscus-derived bioink with good printability and cytocompatibility. A customized printing system for biomimetic meniscus, the dual-nozzle + multitemperature printing system was developed. We have achieved multilayer meniscal biomimetic strategy, especially the best biomimetics of morphology and components. Focusing on application prospect, we designed a few experiments to verity the feasibility and functionality of the scaffold.
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Affiliation(s)
- Zhou Jian
- Medical School of Chinese PLA, Beijing, 100853, China.,Institute of Orthopedics, The First Medical Centre, Chinese PLA General Hospital, Beijing, 100853, China.,Department of Joint Surgery, Peking University Ninth School of Clinical Medicine, Beijing Shijitan Hospital, Capital Medical University, Beijing, 100038, China
| | - Tian Zhuang
- Medical School of Chinese PLA, Beijing, 100853, China.,Institute of Orthopedics, The First Medical Centre, Chinese PLA General Hospital, Beijing, 100853, China.,Department of Joint Surgery, Peking University Ninth School of Clinical Medicine, Beijing Shijitan Hospital, Capital Medical University, Beijing, 100038, China
| | - Tian Qinyu
- Medical School of Chinese PLA, Beijing, 100853, China.,Institute of Orthopedics, The First Medical Centre, Chinese PLA General Hospital, Beijing, 100853, China.,School of Clinical Medicine, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Peng Liqing
- Medical School of Chinese PLA, Beijing, 100853, China.,Institute of Orthopedics, The First Medical Centre, Chinese PLA General Hospital, Beijing, 100853, China
| | - Li Kun
- Medical School of Chinese PLA, Beijing, 100853, China.,Institute of Orthopedics, The First Medical Centre, Chinese PLA General Hospital, Beijing, 100853, China
| | - Luo Xujiang
- Medical School of Chinese PLA, Beijing, 100853, China.,Institute of Orthopedics, The First Medical Centre, Chinese PLA General Hospital, Beijing, 100853, China
| | - Wang Diaodiao
- Department of Joint Surgery, Peking University Ninth School of Clinical Medicine, Beijing Shijitan Hospital, Capital Medical University, Beijing, 100038, China
| | - Yang Zhen
- Medical School of Chinese PLA, Beijing, 100853, China.,Institute of Orthopedics, The First Medical Centre, Chinese PLA General Hospital, Beijing, 100853, China
| | - Jiang Shuangpeng
- Medical School of Chinese PLA, Beijing, 100853, China.,Institute of Orthopedics, The First Medical Centre, Chinese PLA General Hospital, Beijing, 100853, China
| | - Sui Xiang
- Medical School of Chinese PLA, Beijing, 100853, China.,Institute of Orthopedics, The First Medical Centre, Chinese PLA General Hospital, Beijing, 100853, China
| | - Huang Jingxiang
- Medical School of Chinese PLA, Beijing, 100853, China.,Institute of Orthopedics, The First Medical Centre, Chinese PLA General Hospital, Beijing, 100853, China
| | - Liu Shuyun
- Medical School of Chinese PLA, Beijing, 100853, China.,Institute of Orthopedics, The First Medical Centre, Chinese PLA General Hospital, Beijing, 100853, China
| | - Hao Libo
- Medical School of Chinese PLA, Beijing, 100853, China.,Institute of Orthopedics, The First Medical Centre, Chinese PLA General Hospital, Beijing, 100853, China
| | - Tang Peifu
- Medical School of Chinese PLA, Beijing, 100853, China.,Institute of Orthopedics, The First Medical Centre, Chinese PLA General Hospital, Beijing, 100853, China
| | - Yao Qi
- Department of Joint Surgery, Peking University Ninth School of Clinical Medicine, Beijing Shijitan Hospital, Capital Medical University, Beijing, 100038, China
| | - Guo Quanyi
- Medical School of Chinese PLA, Beijing, 100853, China.,Institute of Orthopedics, The First Medical Centre, Chinese PLA General Hospital, Beijing, 100853, China
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Lin W, Qi X, Guo W, Liang D, Chen H, Lin B, Deng X. A barrier against reactive oxygen species: chitosan/acellular dermal matrix scaffold enhances stem cell retention and improves cutaneous wound healing. Stem Cell Res Ther 2020; 11:383. [PMID: 32894204 PMCID: PMC7487689 DOI: 10.1186/s13287-020-01901-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 08/13/2020] [Accepted: 08/24/2020] [Indexed: 12/30/2022] Open
Abstract
Background Stem cell therapies have gained great attention for providing novel solutions for treatment of various injuries and diseases due to stem cells’ self-renewal, ability to differentiate into various cell types, and favorite paracrine function. Nevertheless, the low retention of transplanted stem cell still limits their clinical applications such as in wound healing in view of an induced harsh microenvironment rich in reactive oxygen species (ROS) during inflammatory reactions. Methods Herein, a novel chitosan/acellular dermal matrix (CHS/ADM) stem cell delivery system is developed, which is of great ROS scavenging activity and significantly attenuates inflammatory response. Result Under ROS microenvironment, this stem cell delivery system acts as a barrier, effectively scavenging an amount of ROS and protecting mesenchymal stem cells (MSCs) from the oxidative stress. It notably regulates intracellular ROS level in MSCs and reduces ROS-induced cellular death. Most importantly, such MSCs delivery system significantly enhances in vivo transplanted stem cell retention, promotes the vessel growth, and accelerates wound healing. Conclusions This novel delivery system, which overcomes the limitations of conventional plain collagen-based delivery system in lacking of ROS-environmental responsive mechanisms, demonstrates a great potential use in stem cell therapies in wound healing.
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Affiliation(s)
- Wei Lin
- MOE Key Laboratory of Laser Life Science, College of Biophotonics & Institute of Laser Life Science, South China Normal University, Guangzhou, 510631, China.,Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, 510631, China
| | - Xiaoyang Qi
- The Brain Cognition and Brain Disease Institute of Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Wenjing Guo
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Danyang Liang
- MOE Key Laboratory of Laser Life Science, College of Biophotonics & Institute of Laser Life Science, South China Normal University, Guangzhou, 510631, China.,Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, 510631, China
| | - Heting Chen
- MOE Key Laboratory of Laser Life Science, College of Biophotonics & Institute of Laser Life Science, South China Normal University, Guangzhou, 510631, China.,Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, 510631, China
| | - Baoping Lin
- MOE Key Laboratory of Laser Life Science, College of Biophotonics & Institute of Laser Life Science, South China Normal University, Guangzhou, 510631, China.,Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, 510631, China
| | - Xiaoyuan Deng
- MOE Key Laboratory of Laser Life Science, College of Biophotonics & Institute of Laser Life Science, South China Normal University, Guangzhou, 510631, China. .,Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, 510631, China.
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7
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Li R, Xu Z, Jiang Q, Zheng Y, Chen Z, Chen X. Characterization and biological evaluation of a novel silver nanoparticle-loaded collagen-chitosan dressing. Regen Biomater 2020; 7:371-380. [PMID: 32793382 PMCID: PMC7414998 DOI: 10.1093/rb/rbaa008] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Revised: 01/15/2020] [Accepted: 02/23/2020] [Indexed: 12/19/2022] Open
Abstract
Effective coverage and protection is a priority in wound treatment. Collagen and chitosan have been widely used for wound dressings due to their excellent biological activity and biocompatibility. Silver nanoparticles (AgNPs) have a powerful antibacterial effect. In this study, a macromolecular and small-molecular collagen mixed solution, a macromolecular and small-molecular chitosan mixed solution were prepared, and a silver nanoparticle-loaded collagen-chitosan dressing (AgNP-CCD) has been proposed. First, the effects of a collagen-chitosan mixed solution on the proliferation of human umbilical vein endothelial cells and the secretion of cytokines were evaluated. Then, the characteristics and antibacterial effects of the AgNP-CCD were tested, and the effects on wound healing and the influence of wound cytokine expression were investigated via a deep second-degree burn wound model. The results showed that at the proper proportion and concentration, the collagen-chitosan mixed solution effectively promoted cell proliferation and regulated the levels of growth factors (vascular endothelial growth factor [VEGF], epidermal growth factor [EGF], platelet-derived growth factor [PDGF], transforming growth factor [TGF-β1], basic fibroblastic growth factor [bFGF]) and inflammatory factors (TNF-α, IL-1β, IL-6, IL-8). Moreover, AgNP solutions at lower concentrations exerted limited inhibitory effects on cell proliferation and had no effect on cytokine secretion. The AgNP-CCD demonstrated satisfactory morphological and physical properties as well as efficient antibacterial activities. An in vivo evaluation indicated that AgNP-CCD could accelerate the healing process of deep second-degree burn wounds and played an important role in the regulation of growth and inflammatory factors, including VEGF, EGFL-7, TGF-β1, bFGF, TNF-α and IL-1β. This AgNP-CCD exerted excellent biological effects on wound healing promotion and cytokine expression regulation.
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Affiliation(s)
- Rongfu Li
- Fujian Burn Institute, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China.,Fujian Burn Medical Center, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China.,Fujian Provincial Key Laboratory of Burn and Trauma, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China.,Department of Critical Care Medicine, Quanzhou First Hospital Affiliated Fujian Medical University, Quanzhou, Fujian 362000, China
| | - Zhaorong Xu
- Fujian Burn Institute, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China.,Fujian Burn Medical Center, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China.,Fujian Provincial Key Laboratory of Burn and Trauma, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China
| | - Qiong Jiang
- Fujian Burn Institute, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China.,Fujian Burn Medical Center, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China.,Fujian Provincial Key Laboratory of Burn and Trauma, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China
| | - Yunquan Zheng
- Institute of Pharmaceutical Biotechnology and Engineering, Fuzhou University, Fuzhou, Fujian 350001, China
| | - Zhaohong Chen
- Fujian Burn Institute, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China.,Fujian Burn Medical Center, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China.,Fujian Provincial Key Laboratory of Burn and Trauma, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China
| | - Xiaodong Chen
- Fujian Burn Institute, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China.,Fujian Burn Medical Center, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China.,Fujian Provincial Key Laboratory of Burn and Trauma, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China
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8
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Hassani F, Ebrahimi B, Moini A, Ghiaseddin A, Bazrafkan M, Hassanzadeh GH, Valojerdi MR. Chitosan Hydrogel Supports Integrity of Ovarian Follicles during In Vitro Culture: A Preliminary of A Novel Biomaterial for Three Dimensional Culture of Ovarian Follicles. CELL JOURNAL 2019; 21:479-493. [PMID: 31376330 PMCID: PMC6722450 DOI: 10.22074/cellj.2020.6393] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 11/18/2018] [Indexed: 11/04/2022]
Abstract
Objective Testing novel biomaterials for the three dimensional (3D) culture of ovarian follicles may ultimately lead to a culture model which can support the integrity of follicles during in vitro culture (IVC). The present study reports the first application of a chitosan (CS) hydrogel in culturing mouse preantral follicles. Materials and Methods In this interventional experiment study, CS hydrogels with the concentrations of 0.5, 1, and 1.5% were first tested for fourier transform infrared spectroscopy (FT-IR), Compressive Strength, viscosity, degradation, swelling ratio, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) cytotoxicity and live/dead assay. Thereafter, mouse ovarian follicles were encapsulated in optimum concentration of CS (1%) and compared with those in alginate hydrogel. The follicular morphology, quality of matured oocyte and steroid secretion in both CS and alginate were assessed by enzyme-linked immunosorbent assay (ELISA). The expression of folliculogenesis, endocrine, and apoptotic related genes was also evaluated by quantitative real-time polymerase chain reaction (qRT-PCR) and compared with day that in 0. Results The rates of survival, and diameter of the follicles, secretion of estradiol, normal appearance of meiotic spindle and chromosome alignment were all higher in CS group compared with those in alginate group (P≤0.05). The expression of Cyp19a1 and Lhcgr in CS group was significantly higher than that of the alginate group (P≤0.05). Conclusion The results showed that CS is a permissive hydrogel and has a beneficial effect on encapsulation of ovarian follicle and its further development during 3D culture.
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Affiliation(s)
- Fatemeh Hassani
- Department of Anatomy, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Bita Ebrahimi
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Ashraf Moini
- Department of Gynecology and Obstetrics, Roointan-Arash Maternity Hospital, Tehran University of Medical Sciences, Tehran, Iran.,Department of Endocrinology and Female Infertility, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Ali Ghiaseddin
- Biomedical Engineering Group, Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
| | - Mahshid Bazrafkan
- Department of Anatomy, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - G Holamreza Hassanzadeh
- Department of Anatomy, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran. Electronic Address:
| | - Mojtaba Rezazadeh Valojerdi
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran.,Department of Anatomy, Faculty of Medical Science, Tarbiat Modares University, Tehran, Iran.Electronic Address:,
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9
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Oliveira PN, Montembault A, Sudre G, Alcouffe P, Marcon L, Gehan H, Lux F, Albespy K, Centis V, Campos D, Roques S, Meulle M, Renard M, Durand M, Denost Q, Bordenave L, Vandamme M, Chereul E, Vandesteene M, Boucard N, David L. Self-crosslinked fibrous collagen/chitosan blends: Processing, properties evaluation and monitoring of degradation by bi-fluorescence imaging. Int J Biol Macromol 2019; 131:353-367. [PMID: 30817967 DOI: 10.1016/j.ijbiomac.2019.02.134] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 02/22/2019] [Accepted: 02/22/2019] [Indexed: 12/22/2022]
Abstract
Porous collagen/chitosan scaffolds with different Collagen:Chitosan (Coll:Ch) ratios were prepared by freeze-drying followed by self-crosslinking via dehydrothermal treatment (DHT) and characterized as biomaterials for tissue engineering. Cy7 and Cy5.5 fluorochromes were covalently grafted to collagen and chitosan, respectively. Thus, it was possible, using optical fluorescence imaging of the two fluorochromes, to simultaneously track their in vivo biodegradation, in a blend scaffold form. The fluorescence signal evolution, due to the bioresorption, corroborated with histological analysis. In vitro cytocompatibility of Coll:Ch blend scaffolds were evaluated with standardized tests. In addition, the scaffolds showed a highly interconnected porous structure. Extent of crosslinking was analyzed by convergent analysis using thermogravimetry, Fourier Transform Infrared Spectroscopy and PBS uptake. The variations observed with these techniques indicate strong interactions between collagen and chitosan (covalent and hydrogen bonds) promoted by the DHT. The mechanical properties were characterized to elucidate the impact of the different processing steps in the sample preparation (DHT, neutralization and sterilization by β-irradiation) and showed a robust processing scheme with low impact of Coll:Ch composition ratio.
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Affiliation(s)
- P N Oliveira
- IMP, CNRS UMR 5223, Univ Claude Bernard Lyon 1, Univ Lyon, 15 bd Latarjet, 69622 Villeurbanne, France.
| | - A Montembault
- IMP, CNRS UMR 5223, Univ Claude Bernard Lyon 1, Univ Lyon, 15 bd Latarjet, 69622 Villeurbanne, France
| | - G Sudre
- IMP, CNRS UMR 5223, Univ Claude Bernard Lyon 1, Univ Lyon, 15 bd Latarjet, 69622 Villeurbanne, France
| | - P Alcouffe
- IMP, CNRS UMR 5223, Univ Claude Bernard Lyon 1, Univ Lyon, 15 bd Latarjet, 69622 Villeurbanne, France
| | - L Marcon
- ILM, CNRS UMR 5306, Univ Claude Bernard Lyon 1, Univ Lyon, 43 bd du 11 Nov 1918, 69622 Villeurbanne, France
| | - H Gehan
- ILM, CNRS UMR 5306, Univ Claude Bernard Lyon 1, Univ Lyon, 43 bd du 11 Nov 1918, 69622 Villeurbanne, France
| | - F Lux
- ILM, CNRS UMR 5306, Univ Claude Bernard Lyon 1, Univ Lyon, 43 bd du 11 Nov 1918, 69622 Villeurbanne, France
| | - K Albespy
- Biom'up, 8, allée Irène Joliot Curie, 69800 Saint Priest, France
| | - V Centis
- Biom'up, 8, allée Irène Joliot Curie, 69800 Saint Priest, France
| | - D Campos
- Biom'up, 8, allée Irène Joliot Curie, 69800 Saint Priest, France
| | - S Roques
- CIC1401, CHU Bordeaux, Inserm, Univ Bordeaux, 146 rue Léo Saignat, 33000 Bordeaux, France
| | - M Meulle
- CIC1401, CHU Bordeaux, Inserm, Univ Bordeaux, 146 rue Léo Saignat, 33000 Bordeaux, France
| | - M Renard
- CIC1401, CHU Bordeaux, Inserm, Univ Bordeaux, 146 rue Léo Saignat, 33000 Bordeaux, France
| | - M Durand
- CIC1401, CHU Bordeaux, Inserm, Univ Bordeaux, 146 rue Léo Saignat, 33000 Bordeaux, France; BIOTIS Inserm U1026, Univ Bordeaux, Bioingénierie tissulaire, 146 rue Léo Saignat, Bordeaux 33000, France
| | - Q Denost
- CIC1401, CHU Bordeaux, Inserm, Univ Bordeaux, 146 rue Léo Saignat, 33000 Bordeaux, France; BIOTIS Inserm U1026, Univ Bordeaux, Bioingénierie tissulaire, 146 rue Léo Saignat, Bordeaux 33000, France
| | - L Bordenave
- CIC1401, CHU Bordeaux, Inserm, Univ Bordeaux, 146 rue Léo Saignat, 33000 Bordeaux, France; BIOTIS Inserm U1026, Univ Bordeaux, Bioingénierie tissulaire, 146 rue Léo Saignat, Bordeaux 33000, France
| | | | - E Chereul
- Voxcan, Marcy l'Etoile 69280, France
| | | | - N Boucard
- MDB Texinov, Saint-Didier-de-la Tour 38110, France
| | - L David
- IMP, CNRS UMR 5223, Univ Claude Bernard Lyon 1, Univ Lyon, 15 bd Latarjet, 69622 Villeurbanne, France
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10
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Wolf DA, Beeson W, Rachel JD, Keller GS, Hanke CW, Waibel J, Leavitt M, Sacopulos M. Mesothelial Stem Cells and Stromal Vascular Fraction for Skin Rejuvenation. Facial Plast Surg Clin North Am 2018; 26:513-532. [PMID: 30213431 DOI: 10.1016/j.fsc.2018.06.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The use of stem cells in regenerative medicine and specifically facial rejuvenation is thought provoking and controversial. Today there is increased emphasis on tissue engineering and regenerative medicine, which translates into a need for a reliable source of stem cells in addition to biomaterial scaffolds and cytokine growth factors. Adipose tissue is currently recognized as an accessible and abundant source for adult stem cells. Cellular therapies and tissue engineering are still in their infancy, and additional basic science and preclinical studies are needed before cosmetic and reconstructive surgical applications can be routinely undertaken and satisfactory levels of patient safety achieved.
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Affiliation(s)
- David A Wolf
- Johnson Space Center, Houston, TX, USA; EarthTomorrow, Inc, 1714 Neptune Lane, Houston, TX 77062, USA; Purdue University, West Lafayette, IN, USA
| | - William Beeson
- Facial Plastics, Indianapolis, IN, USA; Department of Dermatology, Indiana University School of Medicine, Indianapolis, IN, USA; Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine, Indianapolis, IN, USA.
| | | | - Gregory S Keller
- Facial Plastics, Santa Barbara, CA, USA; Facial Plastics, Los Angeles, CA, USA
| | - C William Hanke
- Dermatology, Indianapolis, IN, USA; Laser and Skin Center of Indiana, 13400 North Meridian Street, Suite 290, Carmel, IN 46032, USA; ACGME Micrographic Surgery, Dermatologic Oncology Fellowship Training Program, St. Vincent Hospital, Indianapolis, IN, USA; University of Iowa-Carver College of Medicine, Iowa City, IA, USA; University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Jill Waibel
- Dermatology, Miami Dermatology and Laser Institute, 7800 Southwest 87th Avenue, Suite B200, Miami, FL 33173, USA; Baptist Hospital of Miami, Miami, FL, USA; Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Matt Leavitt
- Dermatology, Orlando, FL, USA; Advanced Dermatology and Cosmetic Surgery, The Hair Foundation, 260 Lookout Place Suite 103, Maitland, FL 32751, USA; University of Central Florida, 6850 Lake Nona Boulevard, Orlando, FL 32827, USA; Nova Southeastern University, 4850 Millenium Boulevard, Orlando, FL 32839, USA
| | - Michael Sacopulos
- Medical Risk Management, Medical Risk Institute, 676 Ohio Street, Terre Haute, IN 47807, USA
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11
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Jafarkhani M, Salehi Z, Kowsari-Esfahan R, Shokrgozar MA, Rezaa Mohammadi M, Rajadas J, Mozafari M. Strategies for directing cells into building functional hearts and parts. Biomater Sci 2018; 6:1664-1690. [DOI: 10.1039/c7bm01176h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This review presents the current state-of-the-art, emerging directions and future trends to direct cells for building functional heart parts.
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Affiliation(s)
- Mahboubeh Jafarkhani
- School of Chemical Engineering
- College of Engineering
- University of Tehran
- Iran
- Center for Nanomedicine and Theranostics
| | - Zeinab Salehi
- School of Chemical Engineering
- College of Engineering
- University of Tehran
- Iran
| | | | | | - M. Rezaa Mohammadi
- Biomaterials and Advanced Drug Delivery Laboratory
- Stanford University School of Medicine
- Palo Alto
- USA
- Division of Cardiovascular Medicine
| | - Jayakumar Rajadas
- Biomaterials and Advanced Drug Delivery Laboratory
- Stanford University School of Medicine
- Palo Alto
- USA
- Division of Cardiovascular Medicine
| | - Masoud Mozafari
- Bioengineering Research Group
- Nanotechnology and Advanced Materials Department
- Materials and Energy Research Center (MERC)
- Tehran
- Iran
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12
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Salles THC, Sendyk DI, de Oliveira NK, Machado D, Lancellotti M, Deboni MCZ, Kiang CT, d'Ávila MA. In vitro and in vivo evaluation of electrospun membranes of poly (ε-caprolactone) and poly (rotaxane). MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 77:912-919. [DOI: 10.1016/j.msec.2017.03.190] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 12/23/2016] [Accepted: 03/21/2017] [Indexed: 01/28/2023]
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13
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Bellamy C, Shrestha S, Torneck C, Kishen A. Effects of a Bioactive Scaffold Containing a Sustained Transforming Growth Factor-β1-releasing Nanoparticle System on the Migration and Differentiation of Stem Cells from the Apical Papilla. J Endod 2016; 42:1385-92. [PMID: 27484250 DOI: 10.1016/j.joen.2016.06.017] [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: 10/10/2015] [Revised: 04/29/2016] [Accepted: 06/16/2016] [Indexed: 12/18/2022]
Abstract
INTRODUCTION This 2-part study hypothesized that a bioactive scaffold containing a sustained transforming growth factor (TGF)-β1-releasing nanoparticle system will promote migration and enhance differentiation of stem cells from the apical papilla (SCAP). The study aimed to develop and characterize a novel modified chitosan-based scaffold containing TGF-β1-releasing chitosan nanoparticles (TGF-β1-CSnp) to enhance migration and differentiation of SCAP. METHODS Part I concerns the synthesis and characterization of a carboxymethyl chitosan-based scaffold and TGF-β1-CSnp. Part II examines the effect of sustained TGF-β1 release from scaffold containing TGF-β1-CSnp on odontogenic differentiation of SCAP. RESULTS The scaffold demonstrated properties conducive to cellular activities. The incorporation of TGF-β1 in CSnp allowed sustained release of TGF-β1, facilitating delivery of a critical concentration of TGF-β1 at the opportune time. TGF-β1 bioactivity was maintained for up to 4 weeks. SCAP showed greater viability, migration, and biomineralization in the presence of TGF-β1-CSnp than in the presence of free TGF-β1. SCAP cultured in TGF-β1-CSnp + scaffold showed significantly higher dentin matrix protein-1 and dentin sialophosphoprotein signals compared with free TGF-β1 + scaffold or CSnp + scaffold. CONCLUSIONS These experiments highlighted the potential of a carboxymethyl chitosan-based scaffold with growth factor releasing nanoparticles to promote migration and differentiation of SCAP. The results of this study may have direct application to improve current endodontic regenerative protocols.
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Affiliation(s)
- Craig Bellamy
- Discipline of Endodontics, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - Suja Shrestha
- Discipline of Endodontics, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - Calvin Torneck
- Discipline of Endodontics, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - Anil Kishen
- Discipline of Endodontics, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada.
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14
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Simulation of extracellular matrix remodeling by fibroblast cells in soft three-dimensional bioresorbable scaffolds. Biomech Model Mechanobiol 2016; 15:1685-1698. [DOI: 10.1007/s10237-016-0791-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 04/18/2016] [Indexed: 12/21/2022]
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15
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Combellack EJ, Jessop ZM, Naderi N, Griffin M, Dobbs T, Ibrahim A, Evans S, Burnell S, Doak SH, Whitaker IS. Adipose regeneration and implications for breast reconstruction: update and the future. Gland Surg 2016; 5:227-41. [PMID: 27047789 PMCID: PMC4791352 DOI: 10.3978/j.issn.2227-684x.2016.01.01] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 10/17/2015] [Indexed: 12/20/2022]
Abstract
The evolution of breast reconstruction and management of breast cancer has evolved significantly since the earliest descriptions in the Edwin Smith Papyrus (3,000 BC). The development of surgical and scientific expertise has changed the way that women are managed, and plastic surgeons are now able to offer a wide range of reconstructive options to suit individual needs. Beyond the gold standard autologous flap based reconstructions, regenerative therapies promise the elimination of donor site morbidity whilst providing equivalent aesthetic and functional outcomes. Future research aims to address questions regarding ideal cell source, optimisation of scaffold composition and interaction of de novo adipose tissue in the microenvironment of breast cancer.
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16
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Hu J, Seeberger PH, Yin J. Using carbohydrate-based biomaterials as scaffolds to control human stem cell fate. Org Biomol Chem 2016; 14:8648-58. [DOI: 10.1039/c6ob01124a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review describes the current state and applications of several important and extensively studied natural polysaccharide and glycoprotein scaffolds that can control the stem cell fate.
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Affiliation(s)
- Jing Hu
- Wuxi Medical School
- Key Laboratory of Carbohydrate Chemistry and Biotechnology Ministry of Education
- School of Biotechnology
- Jiangnan University
- Wuxi 214122
| | - Peter H. Seeberger
- Department of Biomolecular Systems
- Max Planck Institute of Colloids and Interfaces
- 14476 Potsdam
- Germany
| | - Jian Yin
- Wuxi Medical School
- Key Laboratory of Carbohydrate Chemistry and Biotechnology Ministry of Education
- School of Biotechnology
- Jiangnan University
- Wuxi 214122
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17
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Song K, Yang Y, Wu S, Zhang Y, Feng S, Wang H, Wang Y, Wang L, Liu T. In vitro culture and harvest of BMMSCs on the surface of a novel thermosensitive glass microcarrier. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 58:324-30. [DOI: 10.1016/j.msec.2015.08.033] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 07/18/2015] [Accepted: 08/22/2015] [Indexed: 12/28/2022]
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18
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Moreira CD, Carvalho SM, Mansur HS, Pereira MM. Thermogelling chitosan–collagen–bioactive glass nanoparticle hybrids as potential injectable systems for tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 58:1207-16. [DOI: 10.1016/j.msec.2015.09.075] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 08/25/2015] [Accepted: 09/19/2015] [Indexed: 12/27/2022]
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19
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Effect of Human Adipose Tissue Mesenchymal Stem Cells on the Regeneration of Ovine Articular Cartilage. Int J Mol Sci 2015; 16:26813-31. [PMID: 26569221 PMCID: PMC4661848 DOI: 10.3390/ijms161125989] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 10/12/2015] [Accepted: 10/15/2015] [Indexed: 02/06/2023] Open
Abstract
Cell therapy is a promising approach to improve cartilage healing. Adipose tissue is an abundant and readily accessible cell source. Previous studies have demonstrated good cartilage repair results with adipose tissue mesenchymal stem cells in small animal experiments. This study aimed to examine these cells in a large animal model. Thirty knees of adult sheep were randomly allocated to three treatment groups: CELLS (scaffold seeded with human adipose tissue mesenchymal stem cells), SCAFFOLD (scaffold without cells), or EMPTY (untreated lesions). A partial thickness defect was created in the medial femoral condyle. After six months, the knees were examined according to an adaptation of the International Cartilage Repair Society (ICRS 1) score, in addition to a new Partial Thickness Model scale and the ICRS macroscopic score. All of the animals completed the follow-up period. The CELLS group presented with the highest ICRS 1 score (8.3 ± 3.1), followed by the SCAFFOLD group (5.6 ± 2.2) and the EMPTY group (5.2 ± 2.4) (p = 0.033). Other scores were not significantly different. These results suggest that human adipose tissue mesenchymal stem cells promoted satisfactory cartilage repair in the ovine model.
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20
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Zhang Q, Hubenak J, Iyyanki T, Alred E, Turza KC, Davis G, Chang EI, Branch-Brooks CD, Beahm EK, Butler CE. Engineering vascularized soft tissue flaps in an animal model using human adipose-derived stem cells and VEGF+PLGA/PEG microspheres on a collagen-chitosan scaffold with a flow-through vascular pedicle. Biomaterials 2015; 73:198-213. [PMID: 26410787 DOI: 10.1016/j.biomaterials.2015.09.024] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 09/04/2015] [Accepted: 09/09/2015] [Indexed: 12/23/2022]
Abstract
Insufficient neovascularization is associated with high levels of resorption and necrosis in autologous and engineered fat grafts. We tested the hypothesis that incorporating angiogenic growth factor into a scaffold-stem cell construct and implanting this construct around a vascular pedicle improves neovascularization and adipogenesis for engineering soft tissue flaps. Poly(lactic-co-glycolic-acid/polyethylene glycol (PLGA/PEG) microspheres containing vascular endothelial growth factor (VEGF) were impregnated into collagen-chitosan scaffolds seeded with human adipose-derived stem cells (hASCs). This setup was analyzed in vitro and then implanted into isolated chambers around a discrete vascular pedicle in nude rats. Engineered tissue samples within the chambers were harvested and analyzed for differences in vascularization and adipose tissue growth. In vitro testing showed that the collagen-chitosan scaffold provided a supportive environment for hASC integration and proliferation. PLGA/PEG microspheres with slow-release VEGF had no negative effect on cell survival in collagen-chitosan scaffolds. In vivo, the system resulted in a statistically significant increase in neovascularization that in turn led to a significant increase in adipose tissue persistence after 8 weeks versus control constructs. These data indicate that our model-hASCs integrated with a collagen-chitosan scaffold incorporated with VEGF-containing PLGA/PEG microspheres supported by a predominant vascular vessel inside a chamber-provides a promising, clinically translatable platform for engineering vascularized soft tissue flap. The engineered adipose tissue with a vascular pedicle could conceivably be transferred as a vascularized soft tissue pedicle flap or free flap to a recipient site for the repair of soft-tissue defects.
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Affiliation(s)
- Qixu Zhang
- Department of Plastic Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.
| | - Justin Hubenak
- Department of Plastic Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Tejaswi Iyyanki
- Department of Plastic Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Erik Alred
- Department of Plastic Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Kristin C Turza
- Department of Plastic Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Greg Davis
- Department of Plastic Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Edward I Chang
- Department of Plastic Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Cynthia D Branch-Brooks
- Department of Plastic Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Elisabeth K Beahm
- Department of Plastic Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Charles E Butler
- Department of Plastic Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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21
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Asthana S, Goyal P, Dhar R, K U, Pampanaboina NB, Christakiran J, Sagiri SS, Khanna M, Samal A, Banerjee I, Pal K, Pramanik K, Ray SS. Evaluation extracellular matrix-chitosan composite films for wound healing application. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:220. [PMID: 26243402 DOI: 10.1007/s10856-015-5551-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 07/31/2015] [Indexed: 06/04/2023]
Abstract
The present study describes the preparation of extracellular matrix (ECM; from porcine omentum) based chitosan composite films for wound dressing applications. The films were prepared by varying the ECM content, whereas, the amount of chitosan was kept constant. The interactions amongst the components of the films were analyzed by FTIR and XRD studies. The films were thoroughly characterized for surface hydrophilicity, moisture retention capability, water vapor permeability, mechanical and biocompatibility. FTIR study indicated that both chitosan and ECM were present in their native form and did not lose their activity. XRD analysis suggested composition dependent change in the crystallinity of the films. The mechanical properties suggested that the composite films had sufficient properties to be used for wound dressing applications. An increase in the ECM content resulted in better hydrophilicity of the films and hence better the moisture retention capacity and retardant water vapor transmission rate property of the composite films. The films were found to be biocompatible to both blood and adipose tissue derived stem cells. In gist, the prepared films may be explored as wound dressing materials.
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Affiliation(s)
- Somya Asthana
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, 769008, India
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22
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Liang L, Wang J, Zhang Y, Shen Z, Zheng J, Li J, Su Z, Cai J, Jiang W, Sun M. Transdifferentiation of bone marrow-derived mesenchymal stem cells into salivary gland-like cells using a novel culture method. Biotechnol Lett 2015; 37:1505-13. [DOI: 10.1007/s10529-015-1809-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Accepted: 02/24/2015] [Indexed: 10/23/2022]
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23
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Chen D, Hao H, Tong C, Liu J, Dong L, Ti D, Hou Q, Liu H, Han W, Fu X. Transdifferentiation of Umbilical Cord–Derived Mesenchymal Stem Cells Into Epidermal-Like Cells by the Mimicking Skin Microenvironment. INT J LOW EXTR WOUND 2015; 14:136-45. [PMID: 25700709 DOI: 10.1177/1534734615569913] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Human umbilical cord–derived mesenchymal stem cells (UC-MSCs) are multipotent, primitive, and have been widely used for skin tissue engineering. Their transdifferentiation is determined by the local microenvironment. In this study, we investigated the potential epidermal differentiation of UC-MSCs and the formation of epidermis substitutes in a 3-dimensional (3D) microenvironment, which was fabricated by UC-MSCs embedded into collagen–chitosan scaffolds (CCSs) combined with an air–liquid interface (ALI) culture system. Using fluorescence microscope, we observed that UC-MSCs were spindle-shaped and evenly distributed in the scaffold. Methyl thiazolyl blue tetrazolium bromide assay and Live/Dead assay indicated that the CCSs have good biocompatibility with UC-MSCs. Immunohistochemistry and western blotting assay showed that UC-MSCs on the surface of the CCSs were positive for the epidermal markers cytokeratin 19 and involucrin at 14 days. In addition, hematoxylin–eosin staining indicated that multilayered epidermis substitutes were established. The constructed epidermis substitutes were applied to treat full-thickness wounds in rats and proved to promote wound healing. In conclusion, manipulating the 3D microenvironment is a novel method for inducing the epidermal differentiation of MSCs to engineer epidermal substitutes, which provides an alternative strategy for skin tissue engineering.
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Affiliation(s)
- Deyun Chen
- Chinese PLA General Hospital, Beijing, China
| | - Haojie Hao
- Chinese PLA General Hospital, Beijing, China
| | - Chuan Tong
- Chinese PLA General Hospital, Beijing, China
| | - Jiejie Liu
- Chinese PLA General Hospital, Beijing, China
| | - Liang Dong
- Chinese PLA General Hospital, Beijing, China
| | - Dongdong Ti
- Chinese PLA General Hospital, Beijing, China
| | - Qian Hou
- Chinese PLA General Hospital, Beijing, China
| | - Huiling Liu
- Chinese PLA General Hospital, Beijing, China
| | - Weidong Han
- Chinese PLA General Hospital, Beijing, China
| | - Xiaobing Fu
- Chinese PLA General Hospital, Beijing, China
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24
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Pourhaghgouy M, Zamanian A. Physical and mechanical properties of the fully interconnected chitosan ice-templated scaffolds. J Appl Polym Sci 2014. [DOI: 10.1002/app.41476] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Masoud Pourhaghgouy
- Department of Nanotechnology and Advanced Materials; Materials and Energy Research Center; P. O. Box 13145-1659 Karaj Iran
| | - Ali Zamanian
- Department of Nanotechnology and Advanced Materials; Materials and Energy Research Center; P. O. Box 13145-1659 Karaj Iran
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25
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Han Y, Tao R, Han Y, Sun T, Chai J, Xu G, Liu J. Microencapsulated VEGF gene-modified umbilical cord mesenchymal stromal cells promote the vascularization of tissue-engineered dermis: an experimental study. Cytotherapy 2014; 16:160-9. [PMID: 24438897 DOI: 10.1016/j.jcyt.2013.10.014] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Revised: 10/25/2013] [Accepted: 10/28/2013] [Indexed: 12/22/2022]
Abstract
BACKGROUND AIMS Tissue-engineered dermis (TED) is thought to be the best treatment for skin defect wounds; however, lack of vascular structures in these products can cause slow vascularization or even transplant failure. We assessed the therapeutic potential of microencapsulated human umbilical cord mesenchymal stromal cells (hUCMSCs) expressing vascular endothelial growth factor (VEGF) in vascularization of TED. METHODS hUCMSCs were isolated by means of enzymatic digestion and identified by means of testing biological characteristics. hUCMSCs were induced to differentiate into dermal fibroblasts in conditioned induction media. Collagen-chitosan laser drilling acellular dermal matrix (ADM) composite scaffold was prepared by means of the freeze dehydration and dehydrothermal cross-linking method. hUCMSC-derived fibroblasts were implanted on composite scaffolds to construct TED. TED with microencapsulated VEGF gene-modified hUCMSCs was then transplanted into skin defect wounds in pigs. The angiogenesis of TED at 1 week and status of wound healing at 3 weeks were observed. RESULTS The collagen-chitosan laser ADM composite has a uniform microporous structure. This composite has been used to grow hUCMSC-derived fibroblasts in vitro and to successfully construct stem cell-derived TED. Microencapsulated VEGF gene-modified hUCMSCs were prepared with the use of a sodium alginate-barium chloride one-step encapsulation technology. Seven days after the transplantation of the stem cell-derived TED and microencapsulated VEGF gene-modified hUCMSCs into the skin defect wounds on the backs of miniature pigs, the VEGF expression increased and the TED had a higher degree of vascularization. Re-epithelialization of the wound was completed after 3 weeks. CONCLUSIONS Microencapsulated VEGF gene-modified hUCMSCs can effectively improve the vascularization of TED and consequently the quality of wound healing.
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Affiliation(s)
- Yanfu Han
- Department of Plastic Surgery, Affiliated Beijing Shijitan Hospital, Capital Medical University, Beijing, People's Republic of China; Department of Burn and Plastic Surgery, Burns Institute, The First Affiliated Hospital of PLA General Hospital, Beijing, People's Republic of China
| | - Ran Tao
- Department of Plastic Surgery, PLA General Hospital, Beijing, People's Republic of China
| | - Yanqing Han
- School of Electrical and Information Engineering, Wuhan Institute of Technology, Wuhan, People's Republic of China
| | - Tianjun Sun
- Department of Burn and Plastic Surgery, Burns Institute, The First Affiliated Hospital of PLA General Hospital, Beijing, People's Republic of China
| | - Jiake Chai
- Department of Burn and Plastic Surgery, Burns Institute, The First Affiliated Hospital of PLA General Hospital, Beijing, People's Republic of China.
| | - Guang Xu
- Department of Plastic Surgery, Affiliated Beijing Shijitan Hospital, Capital Medical University, Beijing, People's Republic of China
| | - Jing Liu
- Department of Plastic Surgery, Affiliated Beijing Shijitan Hospital, Capital Medical University, Beijing, People's Republic of China
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26
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Machula H, Ensley B, Kellar R. Electrospun Tropoelastin for Delivery of Therapeutic Adipose-Derived Stem Cells to Full-Thickness Dermal Wounds. Adv Wound Care (New Rochelle) 2014; 3:367-375. [PMID: 24804156 DOI: 10.1089/wound.2013.0513] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Accepted: 01/20/2014] [Indexed: 11/12/2022] Open
Abstract
Objective: To evaluate the physiological effects of electrospun tropoelastin scaffolds as therapeutic adipose-derived stem cell (ADSC) delivery vehicles for the treatment of full-thickness dermal wounds. Approach: Using the process of electrospinning, several prototype microfiber scaffolds were created with tropoelastin. Initial testing of scaffold biocompatibility was performed in vitro through ADSC culture, followed by scanning electron microscopy (SEM) for assessment of ADSC attachment, morphology, and new extracellular matrix (ECM) deposition. The wound healing effects of ADSC-seeded scaffolds were then evaluated in a murine dermal excisional wound model. Results: For the in vitro study, SEM revealed exceptional biocompatibility of electrospun tropoelastin for ADSCs. In the wound-healing study, ADSC-treated groups demonstrated significantly enhanced wound closure and epithelial thickness compared to controls. Innovation: This is the first report on the use of tropoelastin-based biomaterials as delivery vehicles for therapeutic ADSCs. Conclusion: We have demonstrated that tropoelastin-based ADSC delivery vehicles significantly accelerate wound healing compared to controls that represent the current clinical standard of care. Furthermore, the unique mechanical and biochemical characteristics of tropoelastin may favor its use over other biological or synthetic scaffolds for the treatment of certain pathologies due to its unique intrinsic mechanical properties.
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Affiliation(s)
- Hans Machula
- Biological Sciences, Northern Arizona University, Flagstaff, Arizona
| | | | - Robert Kellar
- Biological Sciences, Northern Arizona University, Flagstaff, Arizona
- Protein Genomics, Sedona, Arizona
- Development Engineering Sciences, Flagstaff, Arizona
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Emmert MY, Hitchcock RW, Hoerstrup SP. Cell therapy, 3D culture systems and tissue engineering for cardiac regeneration. Adv Drug Deliv Rev 2014; 69-70:254-69. [PMID: 24378579 DOI: 10.1016/j.addr.2013.12.004] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 12/06/2013] [Accepted: 12/17/2013] [Indexed: 01/02/2023]
Abstract
Ischemic Heart Disease (IHD) still represents the "Number One Killer" worldwide accounting for the death of numerous patients. However the capacity for self-regeneration of the adult heart is very limited and the loss of cardiomyocytes in the infarcted heart leads to continuous adverse cardiac-remodeling which often leads to heart-failure (HF). The concept of regenerative medicine comprising cell-based therapies, bio-engineering technologies and hybrid solutions has been proposed as a promising next-generation approach to address IHD and HF. Numerous strategies are under investigation evaluating the potential of regenerative medicine on the failing myocardium including classical cell-therapy concepts, three-dimensional culture techniques and tissue-engineering approaches. While most of these regenerative strategies have shown great potential in experimental studies, the translation into a clinical setting has either been limited or too rapid leaving many key questions unanswered. This review summarizes the current state-of-the-art, important challenges and future research directions as to regenerative approaches addressing IHD and resulting HF.
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Wang HY, Wei RH, Zhao SZ. Evaluation of corneal cell growth on tissue engineering materials as artificial cornea scaffolds. Int J Ophthalmol 2013; 6:873-8. [PMID: 24392340 DOI: 10.3980/j.issn.2222-3959.2013.06.23] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2012] [Accepted: 09/05/2013] [Indexed: 12/24/2022] Open
Abstract
The keratoprosthesis (KPro; artificial cornea) is a special refractive device to replace human cornea by using heterogeneous forming materials for the implantation into the damaged eyes in order to obtain a certain vision. The main problems of artificial cornea are the biocompatibility and stability of the tissue particularly in penetrating keratoplasty. The current studies of tissue-engineered scaffold materials through comprising composites of natural and synthetic biopolymers together have developed a new way to artificial cornea. Although a wide agreement that the long-term stability of these devices would be greatly improved by the presence of cornea cells, modification of keratoprosthesis to support cornea cells remains elusive. Most of the studies on corneal substrate materials and surface modification of composites have tried to improve the growth and biocompatibility of cornea cells which can not only reduce the stimulus of heterogeneous materials, but also more importantly continuous and stable cornea cells can prevent the destruction of collagenase. The necrosis of stroma and spontaneous extrusion of the device, allow for maintenance of a precorneal tear layer, and play the role of ensuring a good optical surface and resisting bacterial infection. As a result, improvement in corneal cells has been the main aim of several recent investigations; some effort has focused on biomaterial for its well biological properties such as promoting the growth of cornea cells. The purpose of this review is to summary the growth status of the corneal cells after the implantation of several artificial corneas.
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Affiliation(s)
- Hai-Yan Wang
- Department of Ophthalmology, Shijiazhuang No.1 Hospital, Shijiazhuang 050000, Hebei Province, China ; Department of Ophthalmology, Tianjin Medical University Eye Hospital, Tianjin 300070, China
| | - Rui-Hua Wei
- Department of Ophthalmology, Tianjin Medical University Eye Hospital, Tianjin 300070, China
| | - Shao-Zhen Zhao
- Department of Ophthalmology, Tianjin Medical University Eye Hospital, Tianjin 300070, China
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Li Q, Li PH, Hou DJ, Zhang AJ, Tao CB, Li XY, Jin PS. EGF Enhances ADSCs Secretion via ERK and JNK Pathways. Cell Biochem Biophys 2013; 69:189-96. [DOI: 10.1007/s12013-013-9769-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Liu X, Wang X, Wang X, Ren H, He J, Qiao L, Cui FZ. Functionalized self-assembling peptide nanofiber hydrogels mimic stem cell niche to control human adipose stem cell behavior in vitro. Acta Biomater 2013; 9:6798-805. [PMID: 23380207 DOI: 10.1016/j.actbio.2013.01.027] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Revised: 01/21/2013] [Accepted: 01/25/2013] [Indexed: 10/27/2022]
Abstract
A class of designer functionalized self-assembling peptide nanofiber scaffolds developed from self-assembling peptide RADA16-I (AcN-RADARADARADARADA-CONH2) has become increasingly attractive not only for studying spatial behaviors of cells, but also for developing approaches for a wide range of medical applications including regenerative medicine, rapid hemostasis and cell therapy. In this study, we report three functionalized self-assembling peptide hydrogels that serve as a three-dimensional (3-D) artificial microenvironment to control human adipose stem cell (hASC) behavior in vitro. Short peptide motifs SKPPGTSS (bone marrow homing motif), FHRRIKA (heparin-binding motif) and PRGDSGYRGDS (two-unit RGD cell adhesion motif) were used to extend the C-terminus of RADA16-I to obtain functionalized peptides. Atomic force microscopy confirmed the formation of self-assembling nanofibers in the mixture of RADA16-I peptide and functionalized peptides. The behaviors of hASCs cultured in 3-D peptide hydrogels, including migration, proliferation and growth factor-secretion ability, were studied. Our results showed that the functionalized peptide hydrogels were suitable 3-D scaffolds for hASC growth with higher cell proliferation, migration and the secretion of angiogenic growth factors compared with tissue culture plates and pure RADA16-I scaffolds. The present study suggests that these functionalized designer peptide hydrogels not only have promising applications for diverse tissue engineering and regenerative medicine applications as stem cell delivery vehicles, but also could be a biomimetic 3-D system to study nanobiomaterial-stem cell interactions and to direct stem cell behaviors.
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Wang L, Rao RR, Stegemann JP. Delivery of mesenchymal stem cells in chitosan/collagen microbeads for orthopedic tissue repair. Cells Tissues Organs 2013; 197:333-43. [PMID: 23571151 PMCID: PMC3711684 DOI: 10.1159/000348359] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/24/2013] [Indexed: 12/13/2022] Open
Abstract
Microencapsulation and delivery of stem cells in biomaterials is a promising approach to repairing damaged tissue in a minimally invasive manner. An appropriate biomaterial niche can protect the embedded cells from the challenging environment in the host tissue, while also directing stem cell differentiation toward the desired lineage. In this study, adult human mesenchymal stem cells (MSC) were embedded in hydrogel microbeads consisting of chitosan and type I collagen using an emulsification process. Glyoxal and β-glycerophosphate were used as chemical and physical crosslinkers to initiate copolymerization of the matrix materials. The average size and size distribution of the microbeads could be varied by controlling the emulsification conditions. Spheroidal microbeads ranging in diameter from 82 ± 19 to 290 ± 78 µm were produced. Viability staining showed that MSC survived the encapsulation process (>90% viability) and spread inside the matrix over a period of 9 days in culture. Induced osteogenic differentiation using medium supplements showed that MSC increased gene expression of osterix and osteocalcin over time in culture, and also deposited calcium mineral. Bone sialoprotein and type I collagen gene expression were not affected. Delivery of microbeads through standard needles at practically relevant flow rates did not adversely affect cell viability, and microbeads could also be easily molded into prescribed geometries for delivery. Such protein-based microbeads may have utility in orthopedic tissue regeneration by allowing minimally invasive delivery of progenitor cells in microenvironments that are both protective and instructive.
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Affiliation(s)
- Limin Wang
- Department of Biomedical Engineering, University of Michigan Ann Arbor, MI 48109, USA
| | - Rameshwar R. Rao
- Department of Biomedical Engineering, University of Michigan Ann Arbor, MI 48109, USA
| | - Jan P. Stegemann
- Department of Biomedical Engineering, University of Michigan Ann Arbor, MI 48109, USA
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Araña M, Peña E, Abizanda G, Cilla M, Ochoa I, Gavira JJ, Espinosa G, Doblaré M, Pelacho B, Prosper F. Preparation and characterization of collagen-based ADSC-carrier sheets for cardiovascular application. Acta Biomater 2013; 9:6075-83. [PMID: 23261927 DOI: 10.1016/j.actbio.2012.12.014] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Revised: 12/06/2012] [Accepted: 12/11/2012] [Indexed: 01/16/2023]
Abstract
The use of scaffolds composed of natural biodegradable matrices represents an attractive strategy to circumvent the lack of cell engraftment, a major limitation of stem cell therapy in cardiovascular diseases. Bovine-derived non-porous collagen scaffolds with different degrees of cross-linking (C0, C2, C5 and C10) were produced and tested for their mechanical behavior, in vitro biocompatibility with adipose-derived stem cells (ADSCs) and tissue adhesion and inflammatory reaction. Uniaxial tensile tests revealed an anisotropic behavior of collagen scaffolds (2×0.5cm) and statistically significant differences in the mechanical behavior between cross-linked and non-cross-linked scaffolds (n=5). In vitro, ADSCs adhered homogenously and showed a similar degree of proliferation on all four types of scaffolds (cells×10(3)cm(-2) at day 7: C0: 94.7±37.1; C2: 91.7±25.6; C5: 88.2±6.8; C10: 72.8±10.7; P=n.s.; n=3). In order to test the in vivo biocompatibility, a chronic myocardial infarction model was performed in rats and 1.2×1.2cm size collagen scaffolds implanted onto the heart 1month post-infarction. Six animals per group were killed 2, 7 and 30days after transplant. Complete and long-lasting adhesion to the heart was only observed with the non-cross-linked scaffolds with almost total degradation 1month post-transplantation. After 7 and 30days post-implantation, the degree of inflammation was significantly lower in the hearts treated with non-cross-linked scaffolds (day 7: C0: 10.2±2.1%; C2: 16.3±2.9%; C5: 15.9±4.8%; C10: 17.4±4.1%; P<0.05 vs. C0; day 30: C0: 1.3±1.3%; C2: 9.4±3.0%; C5: 7.0±2.1%; C10: 9.8±2.5%; P<0.01 vs. C0). In view of the results, the non-cross-linked scaffold (C0) was chosen as an ADSC-carrier sheet and tested in vivo. One week post-implantation, 25.3±7.0% of the cells transplanted were detected in those animals receiving the cell-carrier sheet whereas no cells were found in animals receiving cells alone (n=3 animals/group). We conclude that the biocompatibility and mechanical properties of the non-cross-linked collagen scaffolds make them a useful cell carrier that greatly favors tissue cell engraftment and may be exploited for cell transplantation in models of cardiac disease.
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Affiliation(s)
- Miriam Araña
- Laboratory of Cell Therapy, Division of Cancer, Foundation for Applied Medical Research, University of Navarra, Navarra, Spain
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Wang L, Song K, Qu X, Wang H, Zhu H, Xu X, Zhang M, Tang Y, Yang X. hTERT Gene Immortalized Human Adipose-Derived Stem Cells and its Multiple Differentiations: a Preliminary Investigation. Appl Biochem Biotechnol 2013; 169:1546-56. [DOI: 10.1007/s12010-012-0019-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2012] [Accepted: 12/04/2012] [Indexed: 01/19/2023]
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Ahtiainen K, Sippola L, Nurminen M, Mannerström B, Haimi S, Suuronen R, Hyttinen J, Ylikomi T, Kellomäki M, Miettinen S. Effects of chitosan and bioactive glass modifications of knitted and rolled polylactide-based 96/4 L/D scaffolds on chondrogenic differentiation of adipose stem cells. J Tissue Eng Regen Med 2012; 9:55-65. [DOI: 10.1002/term.1614] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Revised: 06/25/2012] [Accepted: 08/25/2012] [Indexed: 12/20/2022]
Affiliation(s)
- Katja Ahtiainen
- Department of Cell Biology, School of Medicine; University of Tampere; Finland
- Adult Stem Cells; Institute of Biomedical Technology, University of Tampere; Finland
- BioMediTech; Tampere Finland
- Science Center; Tampere University Hospital; Finland
| | - Laura Sippola
- BioMediTech; Tampere Finland
- Department of Biomedical Engineering; Tampere University of Technology; Finland
| | - Manu Nurminen
- BioMediTech; Tampere Finland
- Department of Biomedical Engineering; Tampere University of Technology; Finland
| | - Bettina Mannerström
- Adult Stem Cells; Institute of Biomedical Technology, University of Tampere; Finland
- BioMediTech; Tampere Finland
- Science Center; Tampere University Hospital; Finland
| | - Suvi Haimi
- Adult Stem Cells; Institute of Biomedical Technology, University of Tampere; Finland
- BioMediTech; Tampere Finland
- Science Center; Tampere University Hospital; Finland
| | - Riitta Suuronen
- Adult Stem Cells; Institute of Biomedical Technology, University of Tampere; Finland
- BioMediTech; Tampere Finland
- Department of Biomedical Engineering; Tampere University of Technology; Finland
- Department of Eye, Ear, and Oral Diseases; Tampere University Hospital; Finland
| | - Jari Hyttinen
- BioMediTech; Tampere Finland
- Department of Biomedical Engineering; Tampere University of Technology; Finland
| | - Timo Ylikomi
- Department of Cell Biology, School of Medicine; University of Tampere; Finland
- FICAM, Finnish Center for Alternative Methods, School of Medicine; University of Tampere; Finland
- Department of Clinical Chemistry; Tampere University Hospital; Finland
| | - Minna Kellomäki
- BioMediTech; Tampere Finland
- Department of Biomedical Engineering; Tampere University of Technology; Finland
| | - Susanna Miettinen
- Adult Stem Cells; Institute of Biomedical Technology, University of Tampere; Finland
- BioMediTech; Tampere Finland
- Science Center; Tampere University Hospital; Finland
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Chen G, Xia Y, Lu X, Zhou X, Zhang F, Gu N. Effects of surface functionalization of PLGA membranes for guided bone regeneration on proliferation and behavior of osteoblasts. J Biomed Mater Res A 2012; 101:44-53. [PMID: 22807128 DOI: 10.1002/jbm.a.34298] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 05/06/2012] [Accepted: 05/22/2012] [Indexed: 12/22/2022]
Abstract
Covalent immobilization of bioactive compounds onto modified poly lactic-co-glycolic acid (PLGA) surfaces is being rapidly developed in tissue engineering, but the compounds and the grafting procedure require optimization. Here, PLGA membranes were grafted with various ratios of collagen/chitosan (COL/CHI) composites after modification by polydopamine and then analyzed using attenuated total reflectance Fourier transform infrared spectroscopy, field emission scanning electron microscopy, and a contact angle meter. Mechanical properties of the membranes were examined by tensile testing. Proliferation of osteoblastic cell line MC3T3-E1 cultured on the membranes was examined by MTT (3-(4, 5-dimethylthiozole-2-yl)-2, 5-diphenyltetrazolium bromide) and flow cytometric analysis. Effects on cell behavior, including cytotaxis, adhesion, and migration, were further investigated by continuous time-lapse imaging for 8 h. The COL/CHI composites were successfully immobilized onto PLGA surfaces. PLGA mainly contributed the mechanical properties, while COL/CHI played a major role in bioactivity. COL facilitated cell adhesion and spread, but the addition of CHI decreased both. A critical ratio of COL/CHI (2:1) above which the addition of CHI only slightly impacted cell proliferation was found. The results should be useful for combining versatile materials from different origins to construct guided bone regeneration membranes and to further optimize the ratio of COL/CHI composites.
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Affiliation(s)
- Gang Chen
- Institute of Stomatology, NanJing Medical University, NanJing 210029, China
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36
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Investigation of coculture of human adipose-derived stem cells and mature adipocytes. Appl Biochem Biotechnol 2012; 167:2381-7. [PMID: 22717768 DOI: 10.1007/s12010-012-9764-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Accepted: 06/04/2012] [Indexed: 12/26/2022]
Abstract
The purpose of this study was to evaluate the differentiation potential of human adipose-derived stem cells (hADSCs) into adipocytes by coculturing them with human mature adipocytes. The transwell culture system was utilized for indirect coculture of hADSCs and human mature adipocytes at four different hADSCs-to-mature adipocytes ratios, i.e., 1:5, 1:1, 2:1, and 5:1. After 8 days of coculture, the Oil Red O and Trypan Blue stainings were performed for the evaluation of adipogenic differentiation of hADSCs. In addition, flow cytometric analysis and Hoechst 33342/PI double staining were performed after 20 days of coculture. The Oil Red O and Trypan Blue stainings showed that hADSCs with high viability could not differentiate into mature adipocytes after 8 or 20 days of coculture. However, flow cytometric analysis indicated that CD105 expression of hADSCs decreased after 20 days of coculture. These results indicated that hADSCs cocultured with human adult adipocytes could not successfully differentiate into adipocytes.
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Chiu LLY, Janic K, Radisic M. Engineering of oriented myocardium on three-dimensional micropatterned collagen-chitosan hydrogel. Int J Artif Organs 2012; 35:237-50. [PMID: 22505198 DOI: 10.5301/ijao.5000084] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/09/2011] [Indexed: 11/20/2022]
Abstract
INTRODUCTION Surface topography and electrical field stimulation are important guidance cues that aid the organization and contractility of cardiomyocytes in vivo. We report here on the use of these biomimetic cues in vitro to engineer an implantable contractile cardiac tissue. METHODS Photocrosslinkable collagen-chitosan hydrogels with microgrooves of 10 µm, 20 µm and 100 µm in width were fabricated using polydimethylsiloxane (PDMS) molds. The hydrogels were seeded with cardiomyocytes, placed into a bioreactor array with the microgrooves aligned with the electrical field lines, and stimulated with biphasic square pulses at 1 Hz and 2.5 V/cm. RESULTS At Day 6, cardiomyocytes were aligned in the direction of the microgrooves. When cultivated without electrical stimulation, the excitation threshold of engineered cardiac tissues using micropatterned hydrogels was significantly lower than using smooth hydrogels, thus showing the importance of cell alignment to cardiac function. The success rate of achieving beating constructs was higher with the application of electrical stimulation. In addition, formation of dense contractile cardiac organoids was observed in groups with both biomimetic cues. The cultivation of cardiomyocytes on hydrogels with 10 µm grooves yielded 100% beating tissues with or without electrical stimulation, thus suggesting a smaller groove width is necessary for cells to communicate and form proper gap junctions. However, electrical field stimulation further increased cell density and enhanced tissue morphology which may be essential for the integration of the tissue construct to the native heart tissue upon implantation. CONCLUSIONS The biodegradability of the hydrogel substrate allows for the rapid translation of the engineered, oriented cardiac tissue to clinical applications.
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Affiliation(s)
- Loraine L Y Chiu
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON - Canada
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Mitsak AG, Dunn AM, Hollister SJ. Mechanical characterization and non-linear elastic modeling of poly(glycerol sebacate) for soft tissue engineering. J Mech Behav Biomed Mater 2011; 11:3-15. [PMID: 22658150 DOI: 10.1016/j.jmbbm.2011.11.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Revised: 11/07/2011] [Accepted: 11/08/2011] [Indexed: 01/01/2023]
Abstract
Scaffold tissue engineering strategies for repairing and replacing soft tissue aim to improve reconstructive and corrective surgical techniques whose limitations include suboptimal mechanical properties, fibrous capsule formation and volume loss due to graft resorption. An effective tissue engineering strategy requires a scaffolding material with low elastic modulus that behaves similarly to soft tissue, which has been characterized as a nonlinear elastic material. The material must also have the ability to be manufactured into specifically designed architectures. Poly(glycerol sebacate) (PGS) is a thermoset elastomer that meets these criteria. We hypothesize that the mechanical properties of PGS can be modulated through curing condition and architecture to produce materials with a range of stiffnesses. To evaluate this hypothesis, we manufactured PGS constructs cured under various conditions and having one of two architectures (solid or porous). Specimens were then tensile tested according to ASTM standards and the data were modeled using a nonlinear elastic Neo-Hookean model. Architecture and testing conditions, including elongation rate and wet versus dry conditions, affected the mechanical properties. Increasing curing time and temperature led to increased tangent modulus and decreased maximum strain for solid constructs. Porous constructs had lower nonlinear elastic properties, as did constructs of both architectures tested under simulated physiological conditions (wetted at 37 °C). Both solid and porous PGS specimens could be modeled well with the Neo-Hookean model. Future studies include comparing PGS properties to other biological tissue types and designing and characterizing PGS scaffolds for regenerating these tissues.
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Affiliation(s)
- Anna G Mitsak
- Department of Biomedical Engineering, 1101 Beal Avenue, Ann Arbor, MI 48104, USA
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Chiu LLY, Radisic M. Controlled release of thymosin β4 using collagen-chitosan composite hydrogels promotes epicardial cell migration and angiogenesis. J Control Release 2011; 155:376-85. [PMID: 21663777 DOI: 10.1016/j.jconrel.2011.05.026] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Accepted: 05/24/2011] [Indexed: 11/27/2022]
Abstract
Rapid vascularization at the infarcted site is crucial for cardiac repair following myocardial infarction. Thymosin β4 (Tβ4), a 43-amino acid peptide, is both angiogenic and cardioprotective. Tβ4 in soluble form was previously shown to promote cell migration from quiescent adult cardiac explants. Here we developed a collagen-chitosan hydrogel for the encapsulation of Tβ4, which allowed its controlled release over 28days to elicit localized and prolonged effects. Contrastingly, Tβ4 was fully released over 3days when encapsulated in collagen-only hydrogels due to charge repulsion and lack of interconnected pores as shown by SEM. The charge of encapsulated molecules affected their release from collagen-chitosan hydrogels. While the release of neutral polyalanine was size-controlled diffusion, that of negatively-charged Tβ4 and positively-charged polylysine was affected by electrostatic interactions of peptides with collagen/chitosan molecules. Hydrogels with encapsulated Tβ4 significantly increased cell migration and outgrowth of CD31-positive capillaries from mouse and rat epicardial explants in vitro, compared to Tβ4-free and soluble controls. Potential advantage of Tβ4 over commonly-used angiogenic growth factors is that it can induce recruitment and differentiation of both endothelial and smooth muscle cells necessary for vascular stability. Importantly, Tβ4-encapsulated collagen-chitosan hydrogels promoted angiogenesis in vivo upon subcutaneous injection, compared to collagen-only hydrogels.
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Affiliation(s)
- Loraine L Y Chiu
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Ontario, Canada
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Cha KJ, Park KS, Kang SW, Cha BH, Lee BK, Han IB, Shin DA, Kim DS, Lee SH. Effect of Replicated Polymeric Substrate with Lotus Surface Structure on Adipose-Derived Stem Cell Behaviors. Macromol Biosci 2011; 11:1357-63. [DOI: 10.1002/mabi.201100134] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Indexed: 10/24/2022]
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Enea D, Henson F, Kew S, Wardale J, Getgood A, Brooks R, Rushton N. Extruded collagen fibres for tissue engineering applications: effect of crosslinking method on mechanical and biological properties. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:1569-78. [PMID: 21556975 DOI: 10.1007/s10856-011-4336-1] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2010] [Accepted: 04/27/2011] [Indexed: 05/26/2023]
Abstract
Reconstituted collagen fibres are promising candidates for tendon and ligament tissue regeneration. The crosslinking procedure determines the fibres' mechanical properties, degradation rate, and cell-fibre interactions. We aimed to compare mechanical and biological properties of collagen fibres resulting from two different types of crosslinking chemistry based on 1-ethyl-3-(3-dimethyllaminopropyl)carbodiimide (EDC). Fibres were crosslinked with either EDC or with EDC and ethylene-glycol-diglycidyl-ether (EDC/EGDE). Single fibres were mechanically tested to failure and bundles of fibres were seeded with tendon fibroblasts (TFs) and cell attachment and proliferation were determined over 14 days in culture. Collagen type I and tenascin-C production were assessed by immunohistochemistry and dot-blotting. EDC chemistry resulted in fibres with average mechanical properties but the highest cell proliferation rate and matrix protein production. EDC/EGDE chemistry resulted in fibres with improved mechanical properties but with a lower biocompatibility profile. Both chemistries may provide useful structures for scaffolding regeneration of tendon and ligament tissue and will be evaluated for in vivo tendon regeneration in future experiments.
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Affiliation(s)
- Davide Enea
- Orthopaedic Research Unit, Department of Surgery, Cambridge University, Addenbrooke's Hospital, Hills Rd, CB22QQ Cambridge, UK.
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Wang L, Stegemann JP. Glyoxal crosslinking of cell-seeded chitosan/collagen hydrogels for bone regeneration. Acta Biomater 2011; 7:2410-7. [PMID: 21345389 DOI: 10.1016/j.actbio.2011.02.029] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Revised: 02/08/2011] [Accepted: 02/15/2011] [Indexed: 10/18/2022]
Abstract
Chitosan and collagen are natural biomaterials that have been used extensively in tissue engineering, both separately and as composite materials. Most methods to fabricate chitosan/collagen composites use freeze drying and chemical crosslinking to create stable porous scaffolds, which subsequently can be seeded with cells. In this study, we directly embedded human bone marrow stem cells (hBMSC) in chitosan/collagen materials by initiating gelation using β-glycerophosphate at physiological temperature and pH. We further examined the use of glyoxal, a dialdehyde with relatively low toxicity, to crosslink these materials and characterized the resulting changes in matrix and cell properties. The cytocompatibility of glyoxal and the crosslinked gels were investigated in terms of hBMSC metabolic activity, viability, proliferation and osteogenic differentiation. These studies revealed that glyoxal was cytocompatible at concentrations below about 1mM for periods of exposure up to 15 h, though the degree of cell spreading and proliferation were dependent on matrix composition. Glyoxal-crosslinked matrices were stiffer and compacted less than uncrosslinked controls. It was further demonstrated that hBMSC can attach and proliferate in three-dimensional matrices composed of 50/50 chitosan/collagen, and that these materials supported osteogenic differentiation in response to stimulation. Such glyoxal-crosslinked chitosan/collagen composite materials may find utility as cell delivery vehicles for enhancing the repair of bone defects.
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Yang TL. Chitin-based materials in tissue engineering: applications in soft tissue and epithelial organ. Int J Mol Sci 2011; 12:1936-63. [PMID: 21673932 PMCID: PMC3111643 DOI: 10.3390/ijms12031936] [Citation(s) in RCA: 111] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2011] [Revised: 03/07/2011] [Accepted: 03/08/2011] [Indexed: 01/15/2023] Open
Abstract
Chitin-based materials and their derivatives are receiving increased attention in tissue engineering because of their unique and appealing biological properties. In this review, we summarize the biomedical potential of chitin-based materials, specifically focusing on chitosan, in tissue engineering approaches for epithelial and soft tissues. Both types of tissues play an important role in supporting anatomical structures and physiological functions. Because of the attractive features of chitin-based materials, many characteristics beneficial to tissue regeneration including the preservation of cellular phenotype, binding and enhancement of bioactive factors, control of gene expression, and synthesis and deposition of tissue-specific extracellular matrix are well-regulated by chitin-based scaffolds. These scaffolds can be used in repairing body surface linings, reconstructing tissue structures, regenerating connective tissue, and supporting nerve and vascular growth and connection. The novel use of these scaffolds in promoting the regeneration of various tissues originating from the epithelium and soft tissue demonstrates that these chitin-based materials have versatile properties and functionality and serve as promising substrates for a great number of future applications.
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Affiliation(s)
- Tsung-Lin Yang
- Department of Otolaryngology, National Taiwan University Hospital and College of Medicine, Taipei, 100, Taiwan; E-Mail: ; Tel.: +886-2-23123456 ext. 63526
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Madhavan K, Belchenko D, Tan W. Roles of genipin crosslinking and biomolecule conditioning in collagen-based biopolymer: Potential for vascular media regeneration. J Biomed Mater Res A 2011; 97:16-26. [DOI: 10.1002/jbm.a.33006] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2010] [Revised: 08/11/2010] [Accepted: 08/17/2010] [Indexed: 11/05/2022]
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Adult stem cells for cardiac tissue engineering. J Mol Cell Cardiol 2011; 50:312-9. [DOI: 10.1016/j.yjmcc.2010.08.009] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2010] [Revised: 07/15/2010] [Accepted: 08/06/2010] [Indexed: 12/17/2022]
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Zhu Y, Liu T, Ye H, Song K, Ma X, Cui Z. Enhancement of adipose-derived stem cell differentiation in scaffolds with IGF-I gene impregnation under dynamic microenvironment. Stem Cells Dev 2011; 19:1547-56. [PMID: 20408758 DOI: 10.1089/scd.2010.0054] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Biochemical and mechanical signals enabling cardiac regeneration can be elucidated by using in vitro tissue engineering models. We hypothesized that human insulin-like growth factor-I (IGF-I) and 3-dimensional (3D) dynamic microenvironment could enhance the survival and differentiation of adipose tissue-derived stem cells (ADSCs). In this study, ADSCs were cultured on 3D porous scaffolds with or without plasmid DNA PIRES2-IGF-I in cardiac media, in static culture dishes, and in a spinning flask bioreactor, respectively. Cell viability, formation of cardiac-like structure, expression of functional proteins, and gene expressions were tested in the cultured constructs on day 14. The results showed that dynamic microenvironment enhanced the release of plasmid DNA; the ADSCs can be transfected by the released plasmid DNA PIRES2-IGF-I in scaffold. IGF-I showed beneficial effects on cellular viability and increase of total protein and also increased the expressions of cardiac-specific proteins and genes in the grafts. It was also demonstrated that dynamic stirring environment could promote the proliferation of ADSCs. Therefore, IGF-I, expressed by ADSCs transfected by DNA PIRES2-IGF-I incorporated into scaffold, and hydrodynamic microenvironment can independently and interactively increase cellular viability and interactively increase the expression of cardiac-specific proteins and genes in the grafts. The results would be useful for developing tissue-engineered grafts for myocardial repair.
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Affiliation(s)
- Yanxia Zhu
- Dalian R&D Center for Stem Cell and Tissue Engineering, Dalian University of Technology, Dalian, China
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Ruan Y, Lin H, Yao J, Chen Z, Shao Z. Preparation of 3D fibroin/chitosan blend porous scaffold for tissue engineering via a simplified method. Macromol Biosci 2011; 11:419-26. [PMID: 21218404 DOI: 10.1002/mabi.201000392] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2010] [Indexed: 11/08/2022]
Abstract
In this work, we developed a simple and flexible method to manufacture a 3D porous scaffold based on the blend of regenerated silk fibroin (RSF) and chitosan (CS). No crosslinker or other toxic reagents were used in this method. The pores of resulted 3D scaffolds were connected with each other, and their sizes could be easily controlled by the concentration of the mixed solution. Compared with pure RSF scaffolds, the water absorptivities of these RSF/CS blend scaffolds with significantly enhanced mechanical properties were greatly increased. The results of MTT and RT-PCR tests indicated that the chondrocytes grew very well in these blend RSF/CS porous scaffolds. This suggested that the RSF/CS blend scaffold prepared by this new method could be a promising candidate for applications in tissue engineering.
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Affiliation(s)
- Yuhui Ruan
- The Key Laboratory of Molecular Engineering of Polymers of MOE, Department of Macromolecular Science, The Laboratory of Advanced Materials, Fudan University, Shanghai 200433, PR China
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Chen PH, Kuo TY, Kuo JY, Tseng YP, Wang DM, Lai JY, Hsieh HJ. Novel chitosan–pectin composite membranes with enhanced strength, hydrophilicity and controllable disintegration. Carbohydr Polym 2010. [DOI: 10.1016/j.carbpol.2010.06.057] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Advances in progenitor cell therapy using scaffolding constructs for central nervous system injury. Stem Cell Rev Rep 2009; 5:283-300. [PMID: 19644777 DOI: 10.1007/s12015-009-9081-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2008] [Accepted: 06/18/2009] [Indexed: 01/16/2023]
Abstract
Traumatic brain injury (TBI) is a major cause of morbidity and mortality in the United States. Current clinical therapy is focused on optimization of the acute/subacute intracerebral milieu, minimizing continued cell death, and subsequent intense rehabilitation to ameliorate the prolonged physical, cognitive, and psychosocial deficits that result from TBI. Adult progenitor (stem) cell therapies have shown promise in pre-clinical studies and remain a focus of intense scientific investigation. One of the fundamental challenges to successful translation of the large body of pre-clinical work is the delivery of progenitor cells to the target location/organ. Classically used vehicles such as intravenous and intra arterial infusion have shown low engraftment rates and risk of distal emboli. Novel delivery methods such as nanofiber scaffold implantation could provide the structural and nutritive support required for progenitor cell proliferation, engraftment, and differentiation. The focus of this review is to explore the current state of the art as it relates to current and novel progenitor cell delivery methods.
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