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Wu C, He X, Zhu Y, Weng W, Cheng K, Wang D, Chen Z. Electrochemical deposition of Ppy/Dex/ECM coatings and their regulation on cellular responses through electrical controlled drug release. Colloids Surf B Biointerfaces 2023; 222:113016. [PMID: 36427406 DOI: 10.1016/j.colsurfb.2022.113016] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 11/06/2022] [Accepted: 11/10/2022] [Indexed: 11/13/2022]
Abstract
Bone tissue engineering requires a material that can simultaneously promote osteogenic differentiation and anti-inflammatory effects at specific times in response to a series of problems after bone implantation. In this study, the porous network-like titanium matrix was constructed and polypyrrole/dexamethasone (Ppy/Dex) composite coatings with three-dimensional nano-network structure were prepared by electrochemical deposition. The biocompatibility of the composite coatings was further improved by the composite of the extracellular matrix (ECM). The Ppy/Dex/ECM composite coatings released Dex by changing the redox state of Ppy under the electrical stimulation of negative pulses, achieving a drug release controlled by electric field. In terms of osteogenic differentiation, the Ppy/Dex/ECM composite coatings exhibited the best osteogenic activity under electrical controlled release, indicating the synergistic effect of Dex and ECM on osteogenic differentiation. In terms of anti-inflammatory properties, ECM exhibited simultaneous inhibition of both pro- and anti-inflammatory process, while Dex demonstrated significant promotion of anti-inflammatory processes. In this work, the effect of electrical controlled drug release on osteogenic differentiation and inflammation in the ECM cell microenvironment was achieved by preparing Ppy/Dex/ECM composite coatings, which is of great significance for bone tissue engineering and regenerative medicine.
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Affiliation(s)
- Chengwei Wu
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China
| | - Xuzhao He
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China
| | - Yifei Zhu
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China
| | - Wenjian Weng
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China; Center of Rehabilitation Biomedical Materials, Zhejiang University, Hangzhou 310027, China
| | - Kui Cheng
- Department of Rehabilitation Medicine, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang Province 310003, China; School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China; Center of Rehabilitation Biomedical Materials, Zhejiang University, Hangzhou 310027, China.
| | - Daming Wang
- Department of Rehabilitation Medicine, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang Province 310003, China; Center of Rehabilitation Biomedical Materials, Zhejiang University, Hangzhou 310027, China.
| | - Zuobing Chen
- Department of Rehabilitation Medicine, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang Province 310003, China; Center of Rehabilitation Biomedical Materials, Zhejiang University, Hangzhou 310027, China.
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Li A, Guo F, Pan Q, Chen S, Chen J, Liu HF, Pan Q. Mesenchymal Stem Cell Therapy: Hope for Patients With Systemic Lupus Erythematosus. Front Immunol 2021; 12:728190. [PMID: 34659214 PMCID: PMC8516390 DOI: 10.3389/fimmu.2021.728190] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 09/14/2021] [Indexed: 12/26/2022] Open
Abstract
Systemic lupus erythematosus (SLE) is a chronic autoimmune disease. Although previous studies have demonstrated that SLE is related to the imbalance of cells in the immune system, including B cells, T cells, and dendritic cells, etc., the mechanisms underlying SLE pathogenesis remain unclear. Therefore, effective and low side-effect therapies for SLE are lacking. Recently, mesenchymal stem cell (MSC) therapy for autoimmune diseases, particularly SLE, has gained increasing attention. This therapy can improve the signs and symptoms of refractory SLE by promoting the proliferation of Th2 and Treg cells and inhibiting the activity of Th1, Th17, and B cells, etc. However, MSC therapy is also reported ineffective in some patients with SLE, which may be related to MSC- or patient-derived factors. Therefore, the therapeutic effects of MSCs should be further confirmed. This review summarizes the status of MSC therapy in refractory SLE treatment and potential reasons for the ineffectiveness of MSC therapy from three perspectives. We propose various MSC modification methods that may be beneficial in enhancing the immunosuppression of MSCs in SLE. However, their safety and protective effects in patients with SLE still need to be confirmed by further experimental and clinical evidence.
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Affiliation(s)
- Aifen Li
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Institute of Nephrology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Fengbiao Guo
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Institute of Nephrology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Quanren Pan
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Institute of Nephrology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Shuxian Chen
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Institute of Nephrology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Jiaxuan Chen
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Institute of Nephrology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Hua-Feng Liu
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Institute of Nephrology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Qingjun Pan
- Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Institute of Nephrology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
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Weng W, Zanetti F, Bovard D, Braun B, Ehnert S, Uynuk-Ool T, Histing T, Hoeng J, Nussler AK, Aspera-Werz RH. A simple method for decellularizing a cell-derived matrix for bone cell cultivation and differentiation. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2021; 32:124. [PMID: 34524552 PMCID: PMC8443471 DOI: 10.1007/s10856-021-06601-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 08/29/2021] [Indexed: 05/02/2023]
Abstract
The extracellular matrix regulates cell survival, proliferation, and differentiation. In vitro two-dimensional cell experiments are typically performed on a plastic plate or a substrate of a single extracellular matrix constituent such as collagen or calcium phosphate. As these approaches do not include extracellular matrix proteins or growth factors, they fail to mimic a complex cell microenvironment. The cell-derived matrix is an alternative platform for better representing the in vivo microenvironment in vitro. Standard decellularization of a cell-derived matrix is achieved by combining chemical and physical methods. In this study, we compared the decellularization efficacy of several methods: ammonium hydroxide, sodium dodecyl sulfate (SDS), or Triton X-100 with cold or heat treatment on a matrix of Saos-2 cells. We found that the protocols containing SDS were cytotoxic during recellularization. Heat treatment at 47 °C was not cytotoxic, removed cellular constituents, inactivated alkaline phosphatase activity, and maintained the levels of calcium deposition. Subsequently, we investigated the differentiation efficiency of a direct bone coculture system in the established decellularized Saos-2 matrix, an inorganic matrix of calcium phosphate, and a plastic plate as a control. We found that the decellularized Saos-2 cell matrix obtained by heat treatment at 47 °C enhanced osteoclast differentiation and matrix mineralization better than the inorganic matrix and the control. This simple and low-cost method allows us to create a Saos-2 decellularized matrix that can be used as an in vivo-like support for the growth and differentiation of bone cells.
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Affiliation(s)
- Weidong Weng
- Department of Trauma and Reconstructive Surgery, BG Trauma Center Tübingen, Siegfried Weller Institute for Trauma Research, Eberhard Karls University Tübingen, 72076, Tübingen, Germany
| | - Filippo Zanetti
- PMI R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, CH-2000, Neuchâtel, Switzerland
| | - David Bovard
- PMI R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, CH-2000, Neuchâtel, Switzerland
| | - Bianca Braun
- Department of Trauma and Reconstructive Surgery, BG Trauma Center Tübingen, Siegfried Weller Institute for Trauma Research, Eberhard Karls University Tübingen, 72076, Tübingen, Germany
| | - Sabrina Ehnert
- Department of Trauma and Reconstructive Surgery, BG Trauma Center Tübingen, Siegfried Weller Institute for Trauma Research, Eberhard Karls University Tübingen, 72076, Tübingen, Germany
| | - Tatiana Uynuk-Ool
- Department of Trauma and Reconstructive Surgery, BG Trauma Center Tübingen, Siegfried Weller Institute for Trauma Research, Eberhard Karls University Tübingen, 72076, Tübingen, Germany
| | - Tina Histing
- Department of Trauma and Reconstructive Surgery, BG Trauma Center Tübingen, Siegfried Weller Institute for Trauma Research, Eberhard Karls University Tübingen, 72076, Tübingen, Germany
| | - Julia Hoeng
- PMI R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, CH-2000, Neuchâtel, Switzerland
| | - Andreas K Nussler
- Department of Trauma and Reconstructive Surgery, BG Trauma Center Tübingen, Siegfried Weller Institute for Trauma Research, Eberhard Karls University Tübingen, 72076, Tübingen, Germany
| | - Romina H Aspera-Werz
- Department of Trauma and Reconstructive Surgery, BG Trauma Center Tübingen, Siegfried Weller Institute for Trauma Research, Eberhard Karls University Tübingen, 72076, Tübingen, Germany.
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Chang X, Ma Z, Zhu G, Lu Y, Yang J. New perspective into mesenchymal stem cells: Molecular mechanisms regulating osteosarcoma. J Bone Oncol 2021; 29:100372. [PMID: 34258182 PMCID: PMC8254115 DOI: 10.1016/j.jbo.2021.100372] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 04/14/2021] [Accepted: 06/02/2021] [Indexed: 02/05/2023] Open
Abstract
The origin of osteosarcoma cells from osteoblasts and mesenchymal stem cells remains controversial. Mesenchymal stem cells regulate the development of osteosarcoma by influencing the tumor microenvironment and mediating cell communication. Mesenchymal stem cells and exosomes secreted by them can be used as good genes and drug carriers for the treatment of osteosarcoma. Mesenchymal stem cells from different tissue sources have different regulatory effects on the development of osteosarcoma.
Mesenchymal stem cells (MSCs) are multipotent stem cells with significant potential for regenerative medicine. The tumorigenesis of osteosarcoma is an intricate system and MSCs act as an indispensable part of this, interacting with the tumor microenvironment (TME) during the process. MSCs link to cells by acting on each component in the TME via autocrine or paracrine extracellular vesicles for cellular communication. Because of their unique characteristics, MSCs can be modified and processed into good biological carriers, loaded with drugs, and transfected with anticancer genes for the targeted treatment of osteosarcoma. Previous high-quality reviews have described the biological characteristics of MSCs; this review will discuss the effects of MSCs on the components of the TME and cellular communication and the prospects for clinical applications of MSCs.
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Key Words
- 3TSR, Three type 1 repeats
- 5 FC, 5-fluorocytosine
- AD-MSCs, Adipose-derived MSCs
- AQP1, Aquaporin-1
- BMSC-derived exosomes, BMSC-Exos
- BMSCs, Bone marrow mesenchymal stem cells
- CAFs, Carcinoma-associated-fibroblasts
- CRC, Colorectal cancer
- CSF, Colony-stimulating factor
- Cellular communication
- Clinical application
- DOX, Doxorubicin
- DP-MSCs, Dental pulp-derived MSCs, hUC-MSCs, Human umbilical cord MSCs
- ECM, Extracellular matrix
- ESCs, embryonic stem cells
- EVs, Extracellular vesicles
- GBM, Glioblastoma
- HCC, hepatocellular carcinoma
- LINE-1, Long interspersing element 1
- MCP-1, Monocyte chemoattractant protein-1
- MSC-Exos, MSC-derived exosomes
- MSC-MVs, MSC microvesicles
- MSCs
- MSCs, Mesenchymal stem cells
- OPG, osteoprotegerin
- OS, osteosarcoma
- Osteosarcoma
- PDGFRα, Platelet derived growth factor receptor α
- PDGFRβ, Platelet derived growth factor receptor β
- PDGFα, Platelet derived growth factor α
- S TRAIL, Secretable variant of the TNF-related apoptosis-inducing ligand
- SD-MSCs, stressed MSCs
- SDF-1, Stromal cell-derived factor 1
- TGF, Transforming growth factor
- TME
- TME, Tumor microenvironment
- TNF, Tumor necrosis factor
- TRA2B, Transformer 2β
- VEGF, Vascular endothelial growth factor
- hASCs, human adipose stem cells
- iPSCs, induced pluripotent stem cells
- yCD::UPRT, Yeast cytosine deaminase::uracil phosphoribosyl transferase
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Affiliation(s)
- Xingyu Chang
- The First Clinical Medical College, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Zhanjun Ma
- The Second Clinical Medical College, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Guomao Zhu
- The First Clinical Medical College, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Yubao Lu
- The Second Clinical Medical College, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Jingjing Yang
- The Second Clinical Medical College, Lanzhou University, Lanzhou, Gansu 730000, China
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Antich C, Jiménez G, Vicente J, López‐Ruiz E, Chocarro‐Wrona C, Griñán‐Lisón C, Carrillo E, Montañez E, Marchal JA. Development of a Biomimetic Hydrogel Based on Predifferentiated Mesenchymal Stem-Cell-Derived ECM for Cartilage Tissue Engineering. Adv Healthc Mater 2021; 10:e2001847. [PMID: 33646595 DOI: 10.1002/adhm.202001847] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 01/06/2021] [Indexed: 12/20/2022]
Abstract
The use of decellularized extracellular matrix (dECM) as a biomaterial has been an important step forward for the development of functional tissue constructs. In addition to tissues and organs, cell cultures are gaining a lot of attention as an alternative source of dECM. In this work, a novel biomimetic hydrogel is developed based on dECM obtained from mesenchymal stem cells (mdECM) for cartilage tissue engineering. To this end, cells are seeded under specific culture conditions to generate an early chondrogenic extracellular matrix (ECM) providing cues and elements necessary for cartilage development. The composition is determined by quantitative, histological, and mass spectrometry techniques. Moreover, the decellularization process is evaluated by measuring the DNA content and compositional analyses, and the hydrogel is formulated at different concentrations (3% and 6% w/v). Results show that mdECM derived hydrogels possess excellent biocompatibility and suitable physicochemical and mechanical properties for their injectability. Furthermore, it is evidenced that this hydrogel is able to induce chondrogenesis of mesenchymal stem cells (MSCs) without supplemental factors and, furthermore, to form hyaline cartilage-like tissue after in vivo implantation. These findings demonstrate for the first time the potential of this hydrogel based on mdECM for applications in cartilage repair and regeneration.
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Affiliation(s)
- Cristina Antich
- Department of Human Anatomy and Embryology Faculty of Medicine University of Granada Granada 18016 Spain
- Instituto de Investigación Biosanitaria ibs. GRANADA University of Granada Granada 18014 Spain
- Biopathology and Regenerative Medicine Institute (IBIMER) Centre for Biomedical Research University of Granada Granada 18100 Spain
- Excellence Research Unit “Modeling Nature” (MNat) University of Granada Granada 18016 Spain
| | - Gema Jiménez
- Instituto de Investigación Biosanitaria ibs. GRANADA University of Granada Granada 18014 Spain
- Biopathology and Regenerative Medicine Institute (IBIMER) Centre for Biomedical Research University of Granada Granada 18100 Spain
- Excellence Research Unit “Modeling Nature” (MNat) University of Granada Granada 18016 Spain
- Department of Health Science Faculty of Experimental Science University of Jaén Jaén 23071 Spain
| | - Juan Vicente
- Excellence Research Unit “Modeling Nature” (MNat) University of Granada Granada 18016 Spain
- Biocolloid and Fluid Physics Group Department of Applied Physics Faculty of Sciences University of Granada Granada 18071 Spain
| | - Elena López‐Ruiz
- Instituto de Investigación Biosanitaria ibs. GRANADA University of Granada Granada 18014 Spain
- Biopathology and Regenerative Medicine Institute (IBIMER) Centre for Biomedical Research University of Granada Granada 18100 Spain
- Excellence Research Unit “Modeling Nature” (MNat) University of Granada Granada 18016 Spain
- Department of Health Science Faculty of Experimental Science University of Jaén Jaén 23071 Spain
| | - Carlos Chocarro‐Wrona
- Department of Human Anatomy and Embryology Faculty of Medicine University of Granada Granada 18016 Spain
- Instituto de Investigación Biosanitaria ibs. GRANADA University of Granada Granada 18014 Spain
- Biopathology and Regenerative Medicine Institute (IBIMER) Centre for Biomedical Research University of Granada Granada 18100 Spain
- Excellence Research Unit “Modeling Nature” (MNat) University of Granada Granada 18016 Spain
| | - Carmen Griñán‐Lisón
- Department of Human Anatomy and Embryology Faculty of Medicine University of Granada Granada 18016 Spain
- Instituto de Investigación Biosanitaria ibs. GRANADA University of Granada Granada 18014 Spain
- Biopathology and Regenerative Medicine Institute (IBIMER) Centre for Biomedical Research University of Granada Granada 18100 Spain
- Excellence Research Unit “Modeling Nature” (MNat) University of Granada Granada 18016 Spain
| | - Esmeralda Carrillo
- Department of Human Anatomy and Embryology Faculty of Medicine University of Granada Granada 18016 Spain
- Instituto de Investigación Biosanitaria ibs. GRANADA University of Granada Granada 18014 Spain
- Biopathology and Regenerative Medicine Institute (IBIMER) Centre for Biomedical Research University of Granada Granada 18100 Spain
- Excellence Research Unit “Modeling Nature” (MNat) University of Granada Granada 18016 Spain
| | - Elvira Montañez
- Department of Orthopedic Surgery and Traumatology Virgen de la Victoria University Hospital Málaga 29010 Spain
- Biomedical Research Institute of Malaga (IBIMA) Virgen de la Victoria University Hospital Málaga 29010 Spain
| | - Juan A. Marchal
- Department of Human Anatomy and Embryology Faculty of Medicine University of Granada Granada 18016 Spain
- Instituto de Investigación Biosanitaria ibs. GRANADA University of Granada Granada 18014 Spain
- Biopathology and Regenerative Medicine Institute (IBIMER) Centre for Biomedical Research University of Granada Granada 18100 Spain
- Excellence Research Unit “Modeling Nature” (MNat) University of Granada Granada 18016 Spain
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Li M, Jin X, Li H, Yang C, Deng S, Wu G. Comprehensive Analysis of Key Genes and Regulatory Elements in Osteosarcoma Affected by Bone Matrix Mineral With Prognostic Values. Front Genet 2020; 11:533. [PMID: 32582282 PMCID: PMC7283541 DOI: 10.3389/fgene.2020.00533] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 05/04/2020] [Indexed: 01/04/2023] Open
Abstract
Osteosarcoma is one of the most common types of bone sarcoma with a poor prognosis. However, genes involved in the mineral metabolism in the microenvironment of the bone affected by osteosarcoma are, to date, largely unknown. A public data series (GSE114237) was used to identify differentially expressed genes (DEGs) between osteosarcoma cells adhering to demineralized osseous surfaces and mineralized osseous surfaces. Functional enrichment analysis of DEGs and hub genes, protein-protein interaction network of DEGs and regulatory network (miRNA-mRNA network and transcription factor (TF)-mRNA network), survival analysis of hub genes was visualized. The prognostic hub genes were considered as candidate genes and their functional predictions were analyzed. A total of 207 DEGs were mainly enriched in extracellular space and thirteen hub genes were mainly enriched in the function of epithelial to mesenchymal transition. However, out of these, only one candidate gene was found to be suitable as a candidate gene. Besides that, 297 miRNAs and 349 TFs interacting with the hub genes were screened. In conclusion, the DEGs, hub genes, miRNAs and TFs screened out in this research could contribute to comprehend the latent mechanisms in osteosarcoma affected by matrix mineral and provide potential research molecular for further study.
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Affiliation(s)
- Mi Li
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xin Jin
- Department of Digestive Surgical Oncology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hao Li
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Caihong Yang
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Sisi Deng
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Gang Wu
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Chen Y, Lee K, Yang Y, Kawazoe N, Chen G. PLGA-collagen-ECM hybrid meshes mimicking stepwise osteogenesis and their influence on the osteogenic differentiation of hMSCs. Biofabrication 2020; 12:025027. [DOI: 10.1088/1758-5090/ab782b] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Improved therapeutics of modified mesenchymal stem cells: an update. J Transl Med 2020; 18:42. [PMID: 32000804 PMCID: PMC6993499 DOI: 10.1186/s12967-020-02234-x] [Citation(s) in RCA: 96] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 01/22/2020] [Indexed: 12/15/2022] Open
Abstract
Background Mesenchymal stromal cells (MSCs) have attracted intense interest due to their powerful intrinsic properties of self-regeneration, immunomodulation and multi-potency, as well as being readily available and easy to isolate and culture. Notwithstanding, MSC based therapy suffers reduced efficacy due to several challenges which include unfavorable microenvironmental factors in vitro and in vivo. Body In the quest to circumvent these challenges, several modification techniques have been applied to the naïve MSC to improve its inherent therapeutic properties. These modification approaches can be broadly divided into two groups to include genetic modification and preconditioning modification (using drugs, growth factors and other molecules). This field has witnessed great progress and continues to gather interest and novelty. We review these innovative approaches in not only maintaining, but also enhancing the inherent biological activities and therapeutics of MSCs with respect to migration, homing to target site, adhesion, survival and reduced premature senescence. We discuss the application of the improved modified MSC in some selected human diseases. Possible ways of yet better enhancing the therapeutic outcome and overcoming challenges of MSC modification in the future are also elaborated. Conclusion The importance of prosurvival and promigratory abilities of MSCs in their therapeutic applications can never be overemphasized. These abilities are maintained and even further enhanced via MSC modifications against the inhospitable microenvironment during culture and transplantation. This is a turning point in MSC-based therapy with promising preclinical studies and higher future prospect.
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Wu YHA, Chiu YC, Lin YH, Ho CC, Shie MY, Chen YW. 3D-Printed Bioactive Calcium Silicate/Poly-ε-Caprolactone Bioscaffolds Modified with Biomimetic Extracellular Matrices for Bone Regeneration. Int J Mol Sci 2019; 20:E942. [PMID: 30795573 PMCID: PMC6413038 DOI: 10.3390/ijms20040942] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 02/19/2019] [Accepted: 02/19/2019] [Indexed: 12/28/2022] Open
Abstract
Currently, clinically available orthopedic implants are extremely biocompatible but they lack specific biological characteristics that allow for further interaction with surrounding tissues. The extracellular matrix (ECM)-coated scaffolds have received considerable interest for bone regeneration due to their ability in upregulating regenerative cellular behaviors. This study delves into the designing and fabrication of three-dimensional (3D)-printed scaffolds that were made out of calcium silicate (CS), polycaprolactone (PCL), and decellularized ECM (dECM) from MG63 cells, generating a promising bone tissue engineering strategy that revolves around the concept of enhancing osteogenesis by creating an osteoinductive microenvironment with osteogenesis-promoting dECM. We cultured MG63 on scaffolds to obtain a dECM-coated CS/PCL scaffold and further studied the biological performance of the dECM hybrid scaffolds. The results indicated that the dECM-coated CS/PCL scaffolds exhibited excellent biocompatibility and effectively enhanced cellular adhesion, proliferation, and differentiation of human Wharton's Jelly mesenchymal stem cells by increasing the expression of osteogenic-related genes. They also presented anti-inflammatory characteristics by showing a decrease in the expression of tumor necrosis factor-alpha (TNF-α) and interleukin-1 (IL-1). Histological analysis of in vivo experiments presented excellent bone regenerative capabilities of the dECM-coated scaffold. Overall, our work presented a promising technique for producing bioscaffolds that can augment bone tissue regeneration in numerous aspects.
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Affiliation(s)
- Yuan-Haw Andrew Wu
- School of Medicine, China Medical University, Taichung 40447, Taiwan.
- 3D Printing Medical Research Center, China Medical University Hospital, Taichung 40447, Taiwan.
| | - Yung-Cheng Chiu
- School of Medicine, China Medical University, Taichung 40447, Taiwan.
- Department of Orthopedics, China Medical University Hospital, Taichung 40447, Taiwan.
| | - Yen-Hong Lin
- 3D Printing Medical Research Center, China Medical University Hospital, Taichung 40447, Taiwan.
- The Ph.D. Program for Medical Engineering and Rehabilitation Science, China Medical University, Taichung 40447, Taiwan.
| | - Chia-Che Ho
- 3D Printing Medical Research Center, China Medical University Hospital, Taichung 40447, Taiwan.
| | - Ming-You Shie
- 3D Printing Medical Research Center, China Medical University Hospital, Taichung 40447, Taiwan.
- School of Dentistry, China Medical University, Taichung 40447, Taiwan.
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung 40447, Taiwan.
| | - Yi-Wen Chen
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung 40447, Taiwan.
- 3D Printing Medical Research Institute, Asia University, Taichung 40447, Taiwan.
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Chen CC, Yu J, Ng HY, Lee AKX, Chen CC, Chen YS, Shie MY. The Physicochemical Properties of Decellularized Extracellular Matrix-Coated 3D Printed Poly(ε-caprolactone) Nerve Conduits for Promoting Schwann Cells Proliferation and Differentiation. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1665. [PMID: 30205596 PMCID: PMC6164117 DOI: 10.3390/ma11091665] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 09/04/2018] [Accepted: 09/06/2018] [Indexed: 12/20/2022]
Abstract
Although autologous nerve grafting remains the gold standard treatment for peripheral nerve injuries, alternative methods such as development of nerve guidance conduits have since emerged and evolved to counter the many disadvantages of nerve grafting. However, the efficacy and viability of current nerve conduits remain unclear in clinical trials. Here, we focused on a novel decellularized extracellular matrix (dECM) and polydopamine (PDA)-coated 3D-printed poly(ε-caprolactone) (PCL)-based conduits, whereby the PDA surface modification acts as an attachment platform for further dECM attachment. We demonstrated that dECM/PDA-coated PCL conduits possessed higher mechanical properties when compared to human or animal nerves. Such modifications were proved to affect cell behaviors. Cellular behaviors and neuronal differentiation of Schwann cells were assessed to determine for the efficacies of the conduits. There were some cell-specific neuronal markers, such as Nestin, neuron-specific class III beta-tubulin (TUJ-1), and microtubule-associated protein 2 (MAP2) analyzed by enzyme-linked immunosorbent assay, and Nestin expressions were found to be 0.65-fold up-regulated, while TUJ1 expressions were 2.3-fold up-regulated and MAP2 expressions were 2.5-fold up-regulated when compared to Ctl. The methodology of PDA coating employed in this study can be used as a simple model to immobilize dECM onto PCL conduits, and the results showed that dECM/PDA-coated PCL conduits can as a practical and clinically viable tool for promoting regenerative outcomes in larger peripheral nerve defects.
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Affiliation(s)
- Chung-Chia Chen
- Graduate Institute of Basic Medical Sciences, China Medical University, Taichung 40447, Taiwan.
- Linsen Chinese Medicine and Kunming Branch, Taipei City Hospital, Taipei 10341, Taiwan.
| | - Joyce Yu
- School of Medicine, China Medical University, Taichung 40447, Taiwan.
- 3D Printing Medical Research Center, China Medical University Hospital, Taichung 40447, Taiwan.
| | - Hooi-Yee Ng
- School of Medicine, China Medical University, Taichung 40447, Taiwan.
- 3D Printing Medical Research Center, China Medical University Hospital, Taichung 40447, Taiwan.
| | - Alvin Kai-Xing Lee
- School of Medicine, China Medical University, Taichung 40447, Taiwan.
- 3D Printing Medical Research Center, China Medical University Hospital, Taichung 40447, Taiwan.
| | - Chien-Chang Chen
- 3D Printing Medical Research Center, China Medical University Hospital, Taichung 40447, Taiwan.
- Master Program for Biomedical Engineering, China Medical University, Taichung 40447, Taiwan.
| | - Yueh-Sheng Chen
- Biomaterials Translational Research Center, China Medical University Hospital, Taichung 40447, Taiwan.
- Lab of Biomaterials, School of Chinese Medicine, China Medical University, Taichung 40447, Taiwan.
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung 40447, Taiwan.
| | - Ming-You Shie
- 3D Printing Medical Research Center, China Medical University Hospital, Taichung 40447, Taiwan.
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung 40447, Taiwan.
- School of Dentistry, China Medical University, Taichung 40447, Taiwan.
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11
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Yang Y, Luo Z, Zhao Y. Osteostimulation scaffolds of stem cells: BMP-7-derived peptide-decorated alginate porous scaffolds promote the aggregation and osteo-differentiation of human mesenchymal stem cells. Biopolymers 2018; 109:e23223. [PMID: 29732529 DOI: 10.1002/bip.23223] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 04/11/2018] [Accepted: 04/12/2018] [Indexed: 11/11/2022]
Abstract
The scaffolds for stem cell-based bone tissue engineering should hold the ability to guide stem cells osteo-differentiating. Otherwise, stem cells will differentiate into unwanted cell types or will form tumors in vivo. Alginate, a natural polysaccharide with great biocompatibility, was widely used in biomedical applications. However, the limited bioactivity and poor osteogenesis capability of pristine alginate hampered its further application in tissue engineering. In this work, a bone forming peptide-1 (BFP-1), derived from bone morphogenetic protein-7, was grafted to alginate polymer chains to prepare peptide-decorated alginate porous scaffolds (pep-APS) for promoting osteo-differentiation of human mesenchymal stem cells (hMSCs). SEM images of pep-APS exhibited porous structure with about 90% porosity (pore size 100-300 μm), which was appropriate for hMSCs ingrowth. The adhesion, proliferation and aggregation of hMSCs grown on pep-APS were enhanced in vitro. Moreover, pep-APS promoted the alkaline phosphatase (ALP) activity of hMSCs, and the osteo-related genes expression was obviously up-regulated. The immunochemical staining and western blot analysis results showed high expression level of OCN and Col1a1 in the hMSCs grown on pep-APS. This work provided a facile and valid strategy to endow the alginate polymers themselves with specific bioactivity and prepare osteopromoting scaffold with enhanced osteogenesis ability, possessing potential applications in stem cell therapy and regenerative medicine.
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Affiliation(s)
- Yue Yang
- Department of Stomatology, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Zuyuan Luo
- Laboratory for Biomaterials and Regenerative Medicine, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
| | - Ying Zhao
- Department of Stomatology, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
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12
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Kusuma GD, Yang MC, Brennecke SP, O'Connor AJ, Kalionis B, Heath DE. Transferable Matrixes Produced from Decellularized Extracellular Matrix Promote Proliferation and Osteogenic Differentiation of Mesenchymal Stem Cells and Facilitate Scale-Up. ACS Biomater Sci Eng 2018; 4:1760-1769. [PMID: 33445333 DOI: 10.1021/acsbiomaterials.7b00747] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Decellularized extracellular matrixes (dECM) derived from mesenchymal stem cell (MSC) cultures have recently emerged as cell culture substrates that improve the proliferation, differentiation, and maintenance of MSC phenotype during ex vivo expansion. These biomaterials have considerable potential in the fields of stem cell biology, tissue engineering, and regenerative medicine. Processing the dECMs into concentrated solutions of biomolecules that enable the useful properties of the native dECM to be transferred to a new surface via a simple adsorption step would greatly increase the usefulness and impact of this technology. The development of such solutions, hereafter referred to as transferable matrixes, is the focus of this article. In this work, we produced transferable matrixes from dECM derived from two human placental MSC cell lines (DMSC23 and CMSC29) using pepsin digestion (P-ECM), urea extraction (U-ECM), and mechanical homogenization in acetic acid (AA-ECM). Native dECMs improved primary DMSC proliferation as well as osteogenic and adipogenic differentiation, compared with traditional expansion procedures. Interestingly, tissue culture plastic coated with P-ECM was able to replicate the proliferative effects of native dECM, while U-ECM was able to replicate osteogenic differentiation. These data illustrate the feasibility of producing dECM-derived transferable matrixes that replicate key features of the native matrixes and show that different processing techniques produce transferable matrixes with varying bioactivities. Additionally, these transferable matrixes are able to coat 1.3-5.2 times the surface area covered by the native dECM, facilitating scale-up of this technology.
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Affiliation(s)
- Gina D Kusuma
- Pregnancy Research Centre, Department of Maternal-Fetal Medicine, Royal Women's Hospital, 20 Flemington Road, Parkville, Victoria 3052, Australia.,School of Chemical and Biomedical Engineering, Particulate Fluids Processing Centre, The University of Melbourne, Parkville, Victoria 3052, Australia
| | - Michael C Yang
- Pregnancy Research Centre, Department of Maternal-Fetal Medicine, Royal Women's Hospital, 20 Flemington Road, Parkville, Victoria 3052, Australia.,School of Chemical and Biomedical Engineering, Particulate Fluids Processing Centre, The University of Melbourne, Parkville, Victoria 3052, Australia
| | - Shaun P Brennecke
- Pregnancy Research Centre, Department of Maternal-Fetal Medicine, Royal Women's Hospital, 20 Flemington Road, Parkville, Victoria 3052, Australia.,Department of Obstetrics and Gynaecology, Royal Women's Hospital, The University of Melbourne, Parkville, Victoria 3052, Australia
| | - Andrea J O'Connor
- School of Chemical and Biomedical Engineering, Particulate Fluids Processing Centre, The University of Melbourne, Parkville, Victoria 3052, Australia
| | - Bill Kalionis
- Pregnancy Research Centre, Department of Maternal-Fetal Medicine, Royal Women's Hospital, 20 Flemington Road, Parkville, Victoria 3052, Australia.,Department of Obstetrics and Gynaecology, Royal Women's Hospital, The University of Melbourne, Parkville, Victoria 3052, Australia
| | - Daniel E Heath
- School of Chemical and Biomedical Engineering, Particulate Fluids Processing Centre, The University of Melbourne, Parkville, Victoria 3052, Australia
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13
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Jeon J, Lee MS, Yang HS. Differentiated osteoblasts derived decellularized extracellular matrix to promote osteogenic differentiation. Biomater Res 2018; 22:4. [PMID: 29484201 PMCID: PMC5824473 DOI: 10.1186/s40824-018-0115-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 02/14/2018] [Indexed: 01/08/2023] Open
Abstract
Background The extracellular matrix (ECM) can directly or indirectly influence on regulation of cell functions such as cell adhesion, migration, proliferation and differentiation. The cell derived ECM (CD-ECM) is a useful in vitro model for studying the comprehensive functions of CD-ECM because it maintains a native-like structure and composition. In this study, the CD-ECM is obtained and a test is carried out to determine the effectiveness of several combinations of decellularized methods. These methods were used to regulate the optimal ECM compositions to be induced by osteogenic differentiation using primary isolated osteoblasts. Result We investigated the effect of osteoblasts re-seeded onto normal osteoblast ECM under the growth medium (GM-ECM) and the osteogenic differentiation medium (OD-ECM). The osteoblasts were then cultured statically for 1, 2, and 4 weeks in a growth medium or differentiation medium. Before osteoblast culture, we performed immunostaining with filamentous actin and nuclei, and then performed DNA quantification. After each culture period, the osteogenic differentiation of the osteoblasts re-seeded on the OD-ECMs was enhanced osteogenic differentiation which confirmed by alkaline phosphatase staining and quantification, Alizarin Red S staining and quantification, and von Kossa staining. The OD-ECM-4 W group showed more effective osteogenic differentiation than GM-ECM and OD-ECM-2 W. Conclusions The OD-ECM-4 W has a better capacity in a microenvironment that supports osteogenic differentiation on the GM-ECM and OD-ECM-2 W. The ECM substrate has a wide range of applications as cell culture system or direct differentiation of stem cell and excellent potential as cell-based tissue repair in orthopedic tissue engineering.
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Affiliation(s)
- Jin Jeon
- 1Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 330-714 Republic of Korea
| | - Min Suk Lee
- 1Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 330-714 Republic of Korea
| | - Hee Seok Yang
- 1Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 330-714 Republic of Korea.,2Department of Pharmaceutical Engineering, Dankook University, Cheonan, 330-714 Republic of Korea
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14
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Chen G, Kawazoe N. Biomimetic Extracellular Matrices and Scaffolds Prepared from Cultured Cells. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1078:465-474. [DOI: 10.1007/978-981-13-0950-2_24] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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15
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The effects of porosity and stiffness of genipin cross-linked egg white simulating aged extracellular matrix on proliferation and aggregation of ovarian cancer cells. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.02.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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16
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Li Y, Xiao Y, Liu C. The Horizon of Materiobiology: A Perspective on Material-Guided Cell Behaviors and Tissue Engineering. Chem Rev 2017; 117:4376-4421. [PMID: 28221776 DOI: 10.1021/acs.chemrev.6b00654] [Citation(s) in RCA: 345] [Impact Index Per Article: 49.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Although the biological functions of cell and tissue can be regulated by biochemical factors (e.g., growth factors, hormones), the biophysical effects of materials on the regulation of biological activity are receiving more attention. In this Review, we systematically summarize the recent progress on how biomaterials with controllable properties (e.g., compositional/degradable dynamics, mechanical properties, 2D topography, and 3D geometry) can regulate cell behaviors (e.g., cell adhesion, spreading, proliferation, cell alignment, and the differentiation or self-maintenance of stem cells) and tissue/organ functions. How the biophysical features of materials influence tissue/organ regeneration have been elucidated. Current challenges and a perspective on the development of novel materials that can modulate specific biological functions are discussed. The interdependent relationship between biomaterials and biology leads us to propose the concept of "materiobiology", which is a scientific discipline that studies the biological effects of the properties of biomaterials on biological functions at cell, tissue, organ, and the whole organism levels. This Review highlights that it is more important to develop ECM-mimicking biomaterials having a self-regenerative capacity to stimulate tissue regeneration, instead of attempting to recreate the complexity of living tissues or tissue constructs ex vivo. The principles of materiobiology may benefit the development of novel biomaterials providing combinative bioactive cues to activate the migration of stem cells from endogenous reservoirs (i.e., cell niches), stimulate robust and scalable self-healing mechanisms, and unlock the body's innate powers of regeneration.
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Affiliation(s)
- Yulin Li
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology , Meilong Road 130, Shanghai 200237, People's Republic of China
| | - Yin Xiao
- Institute of Health and Biomedical Innovation, Queensland University of Technology , Kelvin Grove, Brisbane, Queensland 4059, Australia
| | - Changsheng Liu
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology , Meilong Road 130, Shanghai 200237, People's Republic of China
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17
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Hoshiba T. Cultured cell-derived decellularized matrices: a review towards the next decade. J Mater Chem B 2017; 5:4322-4331. [DOI: 10.1039/c7tb00074j] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Summary of recent progress in cell-derived decellularized matrices preparation and application, with perspectives towards the next decade.
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Affiliation(s)
- T. Hoshiba
- Frontier Center for Organic Materials
- Yamagata University
- Yonezawa
- Japan
- Innovative Flex Course for Frontier Organic Materials Systems
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18
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Shotorbani BB, Alizadeh E, Salehi R, Barzegar A. Adhesion of mesenchymal stem cells to biomimetic polymers: A review. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 71:1192-1200. [PMID: 27987676 DOI: 10.1016/j.msec.2016.10.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Revised: 09/20/2016] [Accepted: 10/13/2016] [Indexed: 02/07/2023]
Abstract
The mesenchymal stem cells (MSCs) are promising candidates for cell therapy due to the self-renewal, multi-potency, ethically approved state and suitability for autologous transplantation. However, key issue for isolation and manipulation of MSCs is adhesion in ex-vivo culture systems. Biomaterials engineered for mimicking natural extracellular matrix (ECM) conditions which support stem cell adhesion, proliferation and differentiation represent a main area of research in tissue engineering. Some of them successfully enhanced cells adhesion and proliferation because of their biocompatibility, biomimetic texture, and chemistry. However, it is still in its infancy, therefore intensification and optimization of in vitro, in vivo, and preclinical studies is needed to clarify efficacies as well as applicability of those bioengineered constructs. The aim of this review is to discuss mechanisms related to the in-vitro adhesion of MSCs, surfaces biochemical, biophysical, and other factors (of cell's natural and artificial micro-environment) which could affect it and a review of previous research attempting for its bio-chemo-optimization.
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Affiliation(s)
| | - Effat Alizadeh
- Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran; Drug Applied Research Center and Faculty of advanced Medical Science, Tabriz University of Medical Sciences, Tabriz, Iran; The Umbilical Cord Stem Cell Research Center (UCSRC), Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Roya Salehi
- Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran; Drug Applied Research Center and Faculty of advanced Medical Science, Tabriz University of Medical Sciences, Tabriz, Iran; The Umbilical Cord Stem Cell Research Center (UCSRC), Tabriz University of Medical Sciences, Tabriz, Iran
| | - Abolfazl Barzegar
- Research Institute for Fundamental Sciences (RIFS), University of Tabriz, Tabriz, Iran; Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
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19
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Zhuang J, Lin J, Li J, Weng W, Cheng K, Wang H. Alternating potentials assisted electrochemical deposition of mineralized collagen coatings. Colloids Surf B Biointerfaces 2015; 136:479-87. [DOI: 10.1016/j.colsurfb.2015.09.050] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 08/24/2015] [Accepted: 09/26/2015] [Indexed: 11/30/2022]
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