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Seitz M, Song Y, Lian XL, Ma Z, Jain E. Soft Polyethylene Glycol Hydrogels Support Human PSC Pluripotency and Morphogenesis. ACS Biomater Sci Eng 2024; 10:4525-4540. [PMID: 38973308 PMCID: PMC11234337 DOI: 10.1021/acsbiomaterials.4c00923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 06/05/2024] [Accepted: 06/05/2024] [Indexed: 07/09/2024]
Abstract
Lumenogenesis within the epiblast represents a critical step in early human development, priming the embryo for future specification and patterning events. However, little is known about the specific mechanisms that drive this process due to the inability to study the early embryo in vivo. While human pluripotent stem cell (hPSC)-based models recapitulate many aspects of the human epiblast, most approaches for generating these 3D structures rely on ill-defined, reconstituted basement membrane matrices. Here, we designed synthetic, nonadhesive polyethylene glycol (PEG) hydrogel matrices to better understand the role of matrix mechanical cues in iPSC morphogenesis, specifically elastic modulus. First, we identified a narrow range of hydrogel moduli that were conducive to the hPSC viability, pluripotency, and differentiation. We then used this platform to investigate the effects of the hydrogel modulus on lumenogenesis, finding that matrices of intermediate stiffness yielded the most epiblast-like aggregates. Conversely, stiffer matrices impeded lumen formation and apico-basal polarization, while the softest matrices yielded polarized but aberrant structures. Our approach offers a simple, modular platform for modeling the human epiblast and investigating the role of matrix cues in its morphogenesis.
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Affiliation(s)
- Michael
P. Seitz
- Department
of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
- Bioinspired
Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, New York 13244, United States
| | - Yuanhui Song
- Department
of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
- Bioinspired
Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, New York 13244, United States
| | - Xiaojun Lance Lian
- Department
of Biomedical Engineering, The Huck Institutes of the Life Sciences,
Department of Biology, Pennsylvania State
University, University
Park, Pennsylvania 16802, United States
| | - Zhen Ma
- Department
of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
- Bioinspired
Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, New York 13244, United States
| | - Era Jain
- Department
of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York 13244, United States
- Bioinspired
Syracuse: Institute for Material and Living Systems, Syracuse University, Syracuse, New York 13244, United States
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2
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Glotzbach K, Faissner A. Substrate-bound and soluble domains of tenascin-C regulate differentiation, proliferation and migration of neural stem and progenitor cells. Front Cell Neurosci 2024; 18:1357499. [PMID: 38425428 PMCID: PMC10902920 DOI: 10.3389/fncel.2024.1357499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 01/23/2024] [Indexed: 03/02/2024] Open
Abstract
Introduction The lack of regenerative capacity of the central nervous system is one of the major challenges nowadays. The knowledge of guidance cues that trigger differentiation, proliferation, and migration of neural stem and progenitor cells is one key element in regenerative medicine. The extracellular matrix protein tenascin-C (Tnc) is a promising candidate to regulate cell fate due to its expression in the developing central nervous system and in the adult neural stem cell niches. Of special interest are the alternatively spliced fibronectin type III (FnIII) domains of Tnc whose combinatorial diversity could theoretically generate up to 64 isoforms in the mouse. A total of 27 isoforms have already been discovered in the developing brain, among others the domain combinations A1D, CD, and A124BCD. Methods In the present study, these domains as well as the combination of the constitutively expressed FnIII domains 7 and 8 (78) were expressed in Chinese hamster ovary cells as pseudo-antibodies fused to the Fc-fragment of a human immunoglobulin G antibody. The fusion proteins were presented to primary mouse neural stem/progenitor cells (NSPCs) grown as neurospheres, either as coated culture substrates or as soluble additives in vitro. The influence of the domains on the differentiation, proliferation and migration of NSPCs was analyzed. Results We observed that the domain combination A124BCD promoted the differentiation of neurons and oligodendrocytes, whereas the domain A1D supported astrocyte differentiation. The constitutively expressed domain 78 had a proliferation and migration stimulating impact. Moreover, most effects were seen only in one of the presentation modes but not in both, suggesting different effects of the Tnc domains in two- and three-dimensional cultures. Discussion This knowledge about the different effect of the Tnc domains might be used to create artificial three-dimensional environments for cell transplantation. Hydrogels spiked with Tnc-domains might represent a promising tool in regenerative medicine.
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Affiliation(s)
| | - Andreas Faissner
- Department of Cell Morphology and Molecular Neurobiology, Faculty of Biology and Biotechnology, Ruhr University Bochum, Bochum, Germany
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3
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Xu W, Gao L, Li W, Wang J, Yue Y, Li X. The adaptation of bovine embryonic stem cells to the changes of feeder layers. In Vitro Cell Dev Biol Anim 2023; 59:85-99. [PMID: 36847888 DOI: 10.1007/s11626-022-00731-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 10/17/2022] [Indexed: 03/01/2023]
Abstract
Although the feeder-free culture system has been established, the microenvironment provided by the feeder cells still possesses a unique advantage in maintaining the long-term stability and the rapid proliferation of pluripotent stem cells (PSCs). The aim of this study is to discover the adaptive ability of PSCs upon changes of feeder layers. In this study, the morphology, pluripotent marker expression, differentiation ability of bovine embryonic stem cells (bESCs) cultured on low-density, or methanol fixed mouse embryonic fibroblasts were examined by immunofluorescent staining, Western blotting, real-time reverse transcription polymerase chain reaction, and RNA-seq. The results showed that the changes of feeder layers did not induce the rapid differentiation of bESCs, while resulting in the differentiation initiation and alteration of pluripotent state of bESCs. More importantly, the expression of endogenous growth factors and extracellular matrix were increased, and the expression of cell adhesion molecules was altered, which indicated that bESCs may compensate some functions of the feeder layers upon its changes. This study shows the PSCs have the self-adaptive ability responded to the feeder layer alteration.
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Affiliation(s)
- Wenqiang Xu
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, Inner Mongolia, People's Republic of China.,Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou, Inner Mongolia, People's Republic of China
| | - Lingna Gao
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, Inner Mongolia, People's Republic of China
| | - Wei Li
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, Inner Mongolia, People's Republic of China
| | - Jing Wang
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, Inner Mongolia, People's Republic of China
| | - Yongli Yue
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, Inner Mongolia, People's Republic of China.
| | - Xueling Li
- State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, Inner Mongolia, People's Republic of China.
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4
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Wang N, Gao Q, Tang J, Jiang Y, Yang L, Shi X, Chen Y, Zhang Y, Fu S, Lin S. Anti-tumor effect of local injectable hydrogel-loaded endostatin alone and in combination with radiotherapy for lung cancer. Drug Deliv 2021; 28:183-194. [PMID: 33427520 PMCID: PMC7808389 DOI: 10.1080/10717544.2020.1869864] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Endostatin (ES) can effectively inhibit neovascularization in most solid tumors and has the potential to make oxygen delivery more efficient and increase the efficacy of radiotherapy (RT). With a short half-life, ES is mainly administered systemically, which leads to low intake in tumor tissue and often toxic systemic side effects. In this study, we used hyaluronic acid-tyramine as a carrier to synthesize an ES-loaded hydrogel drug (ES/HA-Tyr) that can be injected locally. ES/HA-Tyr has a longer half-life and fewer systemic toxic side effects, and it exerts a better anti-angiogenic effect and anti-tumor effect with RT. In vitro, ES/HA-Tyr showed sustained release in the release assay and a stronger ability to inhibit the proliferation of human umbilical vascular endothelial cells (HUVECs) in the MTT assay; it exhibited a more potent effect against HUVEC invasion and a stronger anti-angiogenic effect on HUVECs in tube formation. In vivo, ES/HA-Tyr increased local drug concentration, decreased blood drug concentration, and caused less systemic toxicity. Further, ES/HA-Tyr effectively reduced tumor microvessel density, increased tumor pericyte coverage, decreased tumor hypoxia, and increased RT response. ES/HA-Tyr + RT also had increased anti-tumor and anti-angiogenic effects in Lewis lung cancer (LLC) xenograft models. In conclusion, ES/HA-Tyr showed sustained release, lower systemic toxicity, and better anti-tumor effects than ES. In addition, ES/HA-Tyr + RT enhanced anti-angiogenic effects, reduced tumor hypoxia, and increased the efficacy of RT in LLC-bearing mice.
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Affiliation(s)
- Na Wang
- Department of Oncology, Affiliated Hospital of Southwest Medical University, Luzhou, China.,Department of Oncology, Zigong First People's Hospital, Zigong, China
| | - Qin Gao
- Department of Oncology, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Juan Tang
- Department of Oncology, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - YiQing Jiang
- Department of Oncology, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - LiShi Yang
- Department of Oncology, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - XiangXiang Shi
- Department of Oncology, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Yue Chen
- Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan Province, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Yan Zhang
- Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan Province, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - ShaoZhi Fu
- Department of Oncology, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Sheng Lin
- Department of Oncology, Affiliated Hospital of Southwest Medical University, Luzhou, China
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5
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Yang Y, Xu LP, Zhang X, Wang S. Bioinspired wettable-nonwettable micropatterns for emerging applications. J Mater Chem B 2021; 8:8101-8115. [PMID: 32785360 DOI: 10.1039/d0tb01382j] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Superhydrophilic and superhydrophobic surfaces are prevalent in nature and have received tremendous attention due to their importance in both fundamental research and practical applications. With the high interdisciplinary research and great development of microfabrication techniques, artificial wettable-nonwettable micropatterns inspired by the water-collection behavior of desert beetles have been successfully fabricated. A combination of the two extreme states of superhydrophilicity and superhydrophobicity on the same surface precisely, wettable-nonwettable micropatterns possess unique functionalities, such as controllable superwetting, anisotropic wetting, oriented adhesion, and other properties. In this review, we briefly describe the methods for fabricating wettable-nonwettable patterns, including self-assembly, electrodeposition, inkjet printing, and photolithography. We also highlight some of the emerging applications such as water collection, controllable bioadhesion, cell arrays, microreactors, printing techniques, and biosensors combined with various detection methods. Finally, the current challenges and prospects of this renascent and rapidly developing field are proposed and discussed.
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Affiliation(s)
- Yuemeng Yang
- Research Center for Bioengineering and Sensing Technology, University of Science and Technology Beijing, Beijing 100083, China.
| | - Li-Ping Xu
- Research Center for Bioengineering and Sensing Technology, University of Science and Technology Beijing, Beijing 100083, China.
| | - Xueji Zhang
- Research Center for Bioengineering and Sensing Technology, University of Science and Technology Beijing, Beijing 100083, China. and School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen 518060, Guangdong, China
| | - Shutao Wang
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, CAS Center for Excellence in Nanoscience, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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6
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Zhang L, Xiong N, Liu Y, Gan L. Biomimetic cell-adhesive ligand-functionalized peptide composite hydrogels maintain stemness of human amniotic mesenchymal stem cells. Regen Biomater 2021; 8:rbaa057. [PMID: 33738111 PMCID: PMC7953499 DOI: 10.1093/rb/rbaa057] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 11/02/2020] [Accepted: 12/03/2020] [Indexed: 12/13/2022] Open
Abstract
In vivo, stem cells reside in a three-dimensional (3D) extracellular microenvironment in which complicated biophysical and biochemical factors regulate their behaviors. Biomimicking of the stem cell-matrix interactions is an ideal approach for controlling the stem cell fate. This study investigates the effects of the incorporation of cell-adhesive ligands in 3D self-assembling peptide hydrogels to modulate stem cell survival, proliferation, maintenance of stemness, and osteogenic differentiation. The results show that the composite hydrogels were non-cytotoxic and effective for maintaining human amniotic mesenchymal stem cell (hAMSC) survival, proliferation and phenotypic characterization. The expression levels of pluripotent markers were also upregulated in the composite hydrogels. Under inductive media conditions, mineral deposition and mRNA expression levels of osteogenic genes of hAMSCs were enhanced. The increasing expression of integrin α- and β-subunits for hAMSCs indicates that the ligand-integrin interactions may modulate the cell fate for hAMSCs in composite hydrogels.
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Affiliation(s)
- Ling Zhang
- Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou Province, China
| | - Na Xiong
- Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou Province, China
| | - Yanfei Liu
- Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou Province, China
| | - Lili Gan
- Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou Province, China
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7
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Arkenberg MR, Dimmitt NH, Johnson HC, Koehler KR, Lin CC. Dynamic Click Hydrogels for Xeno-Free Culture of Induced Pluripotent Stem Cells. ADVANCED BIOSYSTEMS 2020; 4:e2000129. [PMID: 32924337 PMCID: PMC7704730 DOI: 10.1002/adbi.202000129] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 08/05/2020] [Indexed: 12/25/2022]
Abstract
Xeno-free, chemically defined poly(ethylene glycol) (PEG)-based hydrogels are being increasingly used for in vitro culture and differentiation of human induced pluripotent stem cells (hiPSCs). These synthetic matrices provide tunable gelation and adaptable material properties crucial for guiding stem cell fate. Here, sequential norbornene-click chemistries are integrated to form synthetic, dynamically tunable PEG-peptide hydrogels for hiPSCs culture and differentiation. Specifically, hiPSCs are photoencapsulated in thiol-norbornene hydrogels crosslinked by multiarm PEG-norbornene (PEG-NB) and proteaselabile crosslinkers. These matrices are used to evaluate hiPSC growth under the influence of extracellular matrix properties. Tetrazine-norbornene (Tz-NB) click reaction is then employed to dynamically stiffen the cell-laden hydrogels. Fast reactive Tz and its stable derivative methyltetrazine (mTz) are tethered to multiarm PEG, yielding mono-functionalized PEG-Tz, PEG-mTz, and dualfunctionalized PEG-Tz/mTz that react with PEG-NB to form additional crosslinks in the cell-laden hydrogels. The versatility of Tz-NB stiffening is demonstrated with different Tz-modified macromers or by intermittent incubation of PEG-Tz for temporal stiffening. Finally, the Tz-NB-mediated dynamic stiffening is explored for 4D culture and definitive endoderm differentiation of hiPSCs. Overall, this dynamic hydrogel platform affords exquisite controls of hydrogel crosslinking for serving as a xeno-free and dynamic stem cell niche.
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Affiliation(s)
- Matthew R Arkenberg
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Nathan H Dimmitt
- Department of Biomedical Engineering, Purdue School of Engineering & Technology, Indiana University-Purdue University Indianapolis, Indianapolis, IN, 46202, USA
| | - Hunter C Johnson
- Department of Biomedical Engineering, Purdue School of Engineering & Technology, Indiana University-Purdue University Indianapolis, Indianapolis, IN, 46202, USA
| | - Karl R Koehler
- Departments of Otolaryngology and Plastic and Oral Surgery, F.M. Kirby Neurobiology Center, Boston Children's Hospital/Harvard Medical School, Boston, MA, 02115, USA
| | - Chien-Chi Lin
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47907, USA
- Department of Biomedical Engineering, Purdue School of Engineering & Technology, Indiana University-Purdue University Indianapolis, Indianapolis, IN, 46202, USA
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8
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Sun YJ, Hsu CH, Ling TY, Liu L, Lin TC, Jakfar S, Young IC, Lin FH. The preparation of cell-containing microbubble scaffolds to mimic alveoli structure as a 3D drug-screening system for lung cancer. Biofabrication 2020; 12:025031. [PMID: 32084662 DOI: 10.1088/1758-5090/ab78ee] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Cancer is the leading cause of mortality worldwide, and lung cancer is the most malignant. However, the high failure rate in oncology drug development from in vitro studies to in vivo preclinical models indicates that the modern methods of evaluating drug efficacies in vitro are not reliable. Traditional 2D cell culture has proved inadequate to mimic real physiological conditions. Current 3D cell culture methods do not represent the delicate structure of lung alveoli. To mimic lung alveoli structure, a cell-containing enzyme-crosslinked gelatin microbubble scaffold was produced by mixing surfactant-containing gelatin solution with microbial transglutaminase (mTGase)-mixed A549 cell suspension in a four-channel flow-focusing microfluidic device. With uniform pore size of about 100 μm in diameter, this gelatin microbubble scaffold resembled the lung alveoli in structure and in mechanical properties with good biocompatibility. Effective gemcitabine concentration required to induce cell death in microbubble scaffolds was significantly higher than in 2D culture together with a longer treatment time. Cell death mechanisms were confirmed to be gemcitabine-induced cell apoptosis through Western blotting and real-time polymerase chain reaction. H&E staining and TUNEL assay showed rounded cells with DNA damage in drug-treated scaffolds. Taken together, the cell-containing microbubble scaffolds successfully mimicked lung alveoli in structure and cellular responses after gemcitabine treatment were similar to clinical regimen of treating lung carcinoma. The microbubble scaffold is promising to facilitate anticancer drug discovery by providing more accurate preclinical predictions.
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Affiliation(s)
- Yu-Jun Sun
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, No. 49, Fanglan Rd, Taipei 10672, Taiwan
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9
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Martelli G, Bloise N, Merlettini A, Bruni G, Visai L, Focarete ML, Giacomini D. Combining Biologically Active β-Lactams Integrin Agonists with Poly(l-lactic acid) Nanofibers: Enhancement of Human Mesenchymal Stem Cell Adhesion. Biomacromolecules 2020; 21:1157-1170. [PMID: 32011862 PMCID: PMC7997109 DOI: 10.1021/acs.biomac.9b01550] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
![]()
Regulating
stem cell adhesion and growth onto functionalized biomaterial
scaffolds is an important issue in the field of tissue engineering
and regenerative medicine. In this study, new electrospun scaffolds
of poly(l-lactic acid) (PLLA), as bioresorbable polymer,
and β-lactam compounds agonists of selected integrins, as functional
components with cell adhesive properties, are designed. The new β-lactam-PLLA
scaffolds contribute significantly in guiding protein translation
involved in human bone marrow mesenchymal stem cells (hBM-MSC) adhesion
and integrin gene expression. Scanning electron microscopy, confocal
laser scanning microscopy, and Western Blot analyses reveal that GM18-PLLA
shows the best results, promoting cell adhesion by significantly driving
changes in focal adhesion proteins distribution (β1 integrin and vinculin) and activation (pFAK), with a notable increase
of GM18-targets subunits integrin gene expression, α4 and β1. These novel functionalized submicrometric
fibrous scaffolds demonstrate, for the first time, the powerful combination
of selective β-lactams agonists of integrins with biomimetic
scaffolds, suggesting a designed rule that could be suitably applied
to tissue repair and regeneration.
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Affiliation(s)
- Giulia Martelli
- Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Nora Bloise
- Department of Molecular Medicine (DMM), Biochemistry Unit, Center for Health Technologies (CHT), UdR INSTM University of Pavia, Viale Taramelli 3/B, 27100 Pavia, Italy.,Department of Occupational Medicine, Toxicology and Environmental Risks, Istituti Clinici Scientifici Maugeri S.p.A, IRCCS, Via S. Boezio 28, 27100 Pavia, Italy
| | - Andrea Merlettini
- Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Giovanna Bruni
- Department of Chemistry, Section of Physical Chemistry, University of Pavia, Viale Taramelli 16, 27100 Pavia, Italy
| | - Livia Visai
- Department of Molecular Medicine (DMM), Biochemistry Unit, Center for Health Technologies (CHT), UdR INSTM University of Pavia, Viale Taramelli 3/B, 27100 Pavia, Italy.,Department of Occupational Medicine, Toxicology and Environmental Risks, Istituti Clinici Scientifici Maugeri S.p.A, IRCCS, Via S. Boezio 28, 27100 Pavia, Italy
| | - Maria Letizia Focarete
- Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Daria Giacomini
- Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy
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10
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Surface-Immobilized Biomolecules. Biomater Sci 2020. [DOI: 10.1016/b978-0-12-816137-1.00036-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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11
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McKee C, Brown C, Chaudhry GR. Self-Assembling Scaffolds Supported Long-Term Growth of Human Primed Embryonic Stem Cells and Upregulated Core and Naïve Pluripotent Markers. Cells 2019; 8:cells8121650. [PMID: 31888235 PMCID: PMC6952907 DOI: 10.3390/cells8121650] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Revised: 12/13/2019] [Accepted: 12/14/2019] [Indexed: 12/14/2022] Open
Abstract
The maintenance and expansion of human embryonic stem cells (ESCs) in two-dimensional (2-D) culture is technically challenging, requiring routine manipulation and passaging. We developed three-dimensional (3-D) scaffolds to mimic the in vivo microenvironment for stem cell proliferation. The scaffolds were made of two 8-arm polyethylene glycol (PEG) polymers functionalized with thiol (PEG-8-SH) and acrylate (PEG-8-Acr) end groups, which self-assembled via a Michael addition reaction. When primed ESCs (H9 cells) were mixed with PEG polymers, they were encapsulated and grew for an extended period, while maintaining their viability, self-renewal, and differentiation potential both in vitro and in vivo. Three-dimensional (3-D) self-assembling scaffold-grown cells displayed an upregulation of core pluripotency genes, OCT4, NANOG, and SOX2. In addition, the expression of primed markers decreased, while the expression of naïve markers substantially increased. Interestingly, the expression of mechanosensitive genes, YAP and TAZ, was also upregulated. YAP inhibition by Verteporfin abrogated the increased expression of YAP/TAZ as well as core and naïve pluripotent markers. Evidently, the 3-D culture conditions induced the upregulation of makers associated with a naïve state of pluripotency in the primed cells. Overall, our 3-D culture system supported the expansion of a homogenous population of ESCs and should be helpful in advancing their use for cell therapy and regenerative medicine.
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Affiliation(s)
- Christina McKee
- Department of Biological Sciences, Oakland University, Rochester, MI 48309, USA; (C.M.); (C.B.)
- OU-WB Institute for Stem Cell and Regenerative Medicine, Rochester, MI 48309, USA
| | - Christina Brown
- Department of Biological Sciences, Oakland University, Rochester, MI 48309, USA; (C.M.); (C.B.)
- OU-WB Institute for Stem Cell and Regenerative Medicine, Rochester, MI 48309, USA
| | - G. Rasul Chaudhry
- Department of Biological Sciences, Oakland University, Rochester, MI 48309, USA; (C.M.); (C.B.)
- OU-WB Institute for Stem Cell and Regenerative Medicine, Rochester, MI 48309, USA
- Correspondence: ; Tel.: +1-248-370-3350
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12
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Jedari B, Rahmani A, Naderi M, Nadri S. MicroRNA‐7 promotes neural differentiation of trabecular meshwork mesenchymal stem cell on nanofibrous scaffold. J Cell Biochem 2019; 121:2818-2827. [DOI: 10.1002/jcb.29513] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 10/08/2019] [Indexed: 01/22/2023]
Affiliation(s)
- Behrouz Jedari
- Department of Medical BiotechnologyZanjan University of Medical SciencesZanjan Iran
| | - Ali Rahmani
- Department of Medical NanotechnologyZanjan University of Medical SciencesZanjan Iran
| | - Mahmood Naderi
- Cell‐Based Therapies Research Center, Digestive Disease Research InstituteTehran University of Medical SciencesTehran Iran
| | - Samad Nadri
- Department of Medical NanotechnologyZanjan University of Medical SciencesZanjan Iran
- Zanjan Metabolic Diseases Research CenterZanjan University of Medical SciencesZanjan Iran
- Zanjan Pharmaceutical Nanotechnology Research CenterZanjan University of Medical SciencesZanjan Iran
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13
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Niloy KK, Gulfam M, Compton KB, Li D, Huang GTJ, Lowe TL. Methacrylated Hyaluronic Acid–Based Hydrogels Maintain Stemness in Human Dental Pulp Stem Cells. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2019. [DOI: 10.1007/s40883-019-00115-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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14
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Santoro R, Perrucci GL, Gowran A, Pompilio G. Unchain My Heart: Integrins at the Basis of iPSC Cardiomyocyte Differentiation. Stem Cells Int 2019; 2019:8203950. [PMID: 30906328 PMCID: PMC6393933 DOI: 10.1155/2019/8203950] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 12/20/2018] [Accepted: 01/10/2019] [Indexed: 02/06/2023] Open
Abstract
The cellular response to the extracellular matrix (ECM) microenvironment mediated by integrin adhesion is of fundamental importance, in both developmental and pathological processes. In particular, mechanotransduction is of growing importance in groundbreaking cellular models such as induced pluripotent stem cells (iPSC), since this process may strongly influence cell fate and, thus, augment the precision of differentiation into specific cell types, e.g., cardiomyocytes. The decryption of the cellular machinery starting from ECM sensing to iPSC differentiation calls for new in vitro methods. Conveniently, engineered biomaterials activating controlled integrin-mediated responses through chemical, physical, and geometrical designs are key to resolving this issue and could foster clinical translation of optimized iPSC-based technology. This review introduces the main integrin-dependent mechanisms and signalling pathways involved in mechanotransduction. Special consideration is given to the integrin-iPSC linkage signalling chain in the cardiovascular field, focusing on biomaterial-based in vitro models to evaluate the relevance of this process in iPSC differentiation into cardiomyocytes.
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Affiliation(s)
- Rosaria Santoro
- Unità di Biologia Vascolare e Medicina Rigenerativa, Centro Cardiologico Monzino IRCCS, via Carlo Parea 4, Milan, Italy
| | - Gianluca Lorenzo Perrucci
- Unità di Biologia Vascolare e Medicina Rigenerativa, Centro Cardiologico Monzino IRCCS, via Carlo Parea 4, Milan, Italy
| | - Aoife Gowran
- Unità di Biologia Vascolare e Medicina Rigenerativa, Centro Cardiologico Monzino IRCCS, via Carlo Parea 4, Milan, Italy
| | - Giulio Pompilio
- Unità di Biologia Vascolare e Medicina Rigenerativa, Centro Cardiologico Monzino IRCCS, via Carlo Parea 4, Milan, Italy
- Dipartimento di Scienze Cliniche e di Comunità, Università degli Studi di Milano, via Festa del Perdono 7, Milan, Italy
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15
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Homing Genes Expression in Fucosyltransferase VI-Treated Umbilical Cord Blood CD133+ Cells which Expanded on Protein-Coated Nanoscaffolds. Mol Biotechnol 2018; 60:455-467. [PMID: 29730712 DOI: 10.1007/s12033-018-0086-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Umbilical cord blood (UCB)-derived hematopoietic stem cells (HSCs) are considered because of their self-renewing, differentiating, proliferating, and readily available properties. Moreover, HSCs' homing to the hematopoietic microenvironment is an important step in their transplantation process. But low content of progenitor cells in one unit of UCB and defect in the bone marrow (BM) homing limit their applications. Hence, we decided to correct this deficiency with ex vivo incubation of CD133+ cells using fucosyltransferase VI and GDP-fucose. Then C-X-C chemokines receptor-4 (CXCR4), very late activation antigen-4 (VLA4), very late activation antigen-5 (VLA5), lymphocyte function-associated antigen-1 (LFA-1), and E-cadherin (E-cad) genes expressions were investigated with the goal of homing evaluation. The purity of MACS isolated CD133+ cells and confirmation of fucosylation were done by flow cytometry, and the viability of cells seeded on protein-coated poly L-lactic acid (PLLA) scaffold was proven via MTT assay. Scanning electron microscopy (SEM), CFU assays, and expression assays of CXCR4, VLA4, VLA5, LFA-1 and E-cad by real-time PCR were performed, too. Flow cytometry data showed that isolated cells were suitable for fucosyltransferase VI (FT-VI) incubation and expansion on nanoscaffolds. MTT, CFU assays, and SEM micrographs demonstrated fibronectin (FN)-collagen-selectin (FCS)-coated scaffold serve as best environment for viability, clonogenicity, and cell attachment. High levels of homing genes expression were also observed in cells seeded on FCS-coated scaffolds. Also, CXCR4 flow cytometry analysis confirmed real-time data. FCS-PLLA scaffolds provided optimal conditions for viability of FT-VI-treated CD133+ cells, and clonogenicity with the goal of improving homing following UCB-HSCs transplantation.
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16
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Reynolds DS, Bougher KM, Letendre JH, Fitzgerald SF, Gisladottir UO, Grinstaff MW, Zaman MH. Mechanical confinement via a PEG/Collagen interpenetrating network inhibits behavior characteristic of malignant cells in the triple negative breast cancer cell line MDA.MB.231. Acta Biomater 2018; 77:85-95. [PMID: 30030173 PMCID: PMC6136430 DOI: 10.1016/j.actbio.2018.07.032] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 07/07/2018] [Accepted: 07/16/2018] [Indexed: 10/28/2022]
Abstract
To decouple the effects of collagen fiber density and network mechanics on cancer cell behavior, we describe a highly tunable in vitro 3D interpenetrating network (IPN) consisting of a primary fibrillar collagen network reinforced by a secondary visible light-mediated thiol-ene poly(ethylene glycol) (PEG) network. This PEG/Collagen IPN platform is cytocompatible, inherently bioactive via native cellular adhesion sites, and mechanically tunable over several orders of magnitude-mimicking both healthy and cancerous breast tissue. Furthermore, we use the PEG/Collagen IPN platform to investigate the effect of mechanical confinement on cancer cell behavior as it is hypothesized that cells within tumors that have yet to invade into the surrounding tissue experience mechanical confinement. We find that mechanical confinement via the IPN impairs behavior characteristic of malignant cells (i.e., viability, proliferation, and cellular motility) in the triple negative breast cancer cell line MDA.MB.231, and is more effective than removal of soluble growth signals. The PEG/Collagen IPN platform is a useful tool for studying mechanotransductive signaling pathways and motivates further investigation into the role of mechanical confinement in cancer progression. STATEMENT OF SIGNIFICANCE In this study, we have developed, optimized, and applied a novel 3D in vitro cell culture platform composed of an interpenetrating network (IPN) that is both mechanically tunable and inherently bioactive. The IPN consists of a primary fibrillar collagen type-1 network reinforced by a secondary thiol-ene poly(ethylene glycol) (PEG) network. The IPNs are formed via a novel strategy in which cell-laden collagen gels are formed first, and soluble PEG monomers are added later and crosslinked via visible light. This approach ensures that the collagen gels contain a fibrillar architecture similar to the collagen architecture present in vivo. We applied our IPN platform to study the effect of mechanical confinement on cancer cell behavior and found that it inhibits malignant-like behavior.
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Affiliation(s)
- Daniel S Reynolds
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
| | - Kristen M Bougher
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
| | - Justin H Letendre
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
| | - Stephen F Fitzgerald
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute (RPI), Rensselaer, NY 12180, USA
| | - Undina O Gisladottir
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA; Department of Biomedical Informatics, Harvard Medical School, Boston, MA 02215, USA
| | - Mark W Grinstaff
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA; Department of Chemistry, Boston University, Boston, MA 02215, USA; Department of Medicine, Boston University School of Medicine, Boston, MA 02118, USA
| | - Muhammad H Zaman
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA; Howard Hughes Medical Institute, Boston University, Boston, MA 02215, USA.
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17
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Bowers DT, Brown JL. Nanofibers as Bioinstructive Scaffolds Capable of Modulating Differentiation through Mechanosensitive Pathways for Regenerative Engineering. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2018; 5:22-29. [PMID: 31179378 DOI: 10.1007/s40883-018-0076-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Bioinstructive scaffolds encode information in the physical shape and size of materials to direct cell responses. Electrospinning nanofibers is a process that offers control over scaffold architecture and fiber diameter, while providing extended linear length of fibers. This review summarizes tissue engineering literature that has utilized nanofiber scaffolds to direct stem cell differentiation for various tissues including musculoskeletal, vascular, immunological and nervous system tissues. Nanofibers are also considered for their extracellular matrix mimetic characteristics that can preserve stem cell differentiation capacity. These topics are considered in the context of focal adhesion and integrin signaling. Regenerative engineering will be enhanced by construction of scaffolds encoded with shape information to cause an attached cell to create the intended tissue at that region. Nanofibers are likely to be a bioinstructive scaffold in future regenerative engineering development as we pursue the Grand Challenges of engineering tissues.
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18
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Kim HY, Baek S, Han NR, Lee E, Park CK, Lee ST. Identification of integrin heterodimers functioning on the surface of undifferentiated porcine primed embryonic stem cells. Cell Biol Int 2018; 42:1221-1227. [PMID: 29809293 DOI: 10.1002/cbin.10993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 05/27/2018] [Indexed: 11/08/2022]
Abstract
In vitro expansion of undifferentiated porcine primed embryonic stem (ES) cells is facilitated by use of non-cellular niches that mimic three-dimensional (3D) microenvironments enclosing an inner cell mass of porcine blastocysts. Therefore, we investigated the integrin heterodimers on the surface of undifferentiated porcine primed ES cells for the purpose of developing a non-cellular niche to support in vitro maintenance of the self-renewal ability of porcine primed ES cells. Immunocytochemistry and a fluorescence immunoassay were performed to assess integrin α and β subunit levels, and attachment and antibody inhibition assays were used to evaluate the function of integrin heterodimers. The integrin α3 , α5 , α6 , α9 , αV , and β1 subunits, but not the α1 , α2 , α4 , α7 , and α8 subunits, were identified on the surface of undifferentiated porcine primed ES cells. Subsequently, significant increase of their adhesion to fibronectin, tenascin C, and vitronectin were observed and functional blocking of integrin heterodimer α5 β1 , α9 β1 , or αV β1 showed significantly inhibited adhesion to fibronectin, tenascin C, or vitronectin. No integrin α6 β1 heterodimer-mediated adhesion to laminin was detected. These results demonstrate that active α5 β1 , α9 β1 , and αV β1 integrin heterodimers are present on the surface of undifferentiated porcine primed ES cells, together with inactive integrin α3 (presumed) and α6 subunits.
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Affiliation(s)
- Hwa-Young Kim
- Department of Animal Life Science, Kangwon National University, Chuncheon, 24341, Korea
| | - Song Baek
- Department of Animal Life Science, Kangwon National University, Chuncheon, 24341, Korea
| | - Na Rae Han
- Department of Animal Life Science, Kangwon National University, Chuncheon, 24341, Korea
| | - Eunsong Lee
- College of Veterinary Medicine, Kangwon National University, Chuncheon, 24341, Korea
| | - Choon-Keun Park
- Department of Animal Life Science, Kangwon National University, Chuncheon, 24341, Korea
| | - Seung Tae Lee
- Department of Animal Life Science, Kangwon National University, Chuncheon, 24341, Korea
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19
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Ovadia EM, Colby DW, Kloxin AM. Designing well-defined photopolymerized synthetic matrices for three-dimensional culture and differentiation of induced pluripotent stem cells. Biomater Sci 2018; 6:1358-1370. [PMID: 29675520 PMCID: PMC6126667 DOI: 10.1039/c8bm00099a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Induced pluripotent stem cells (iPSCs) are of interest for the study of disease, where these cells can be derived from patients and have the potential to be differentiated into any cell type; however, three-dimensional (3D) culture and differentiation of iPSCs within well-defined synthetic matrices for these applications remains limited. Here, we aimed to establish synthetic cell-degradable hydrogels that allow precise presentation of specific biochemical cues for 3D culture of iPSCs with relevance for hypothesis testing and lineage-specific differentiation. We synthesized poly(ethylene glycol)-(PEG)-peptide-based hydrogels by photoinitiated step growth polymerization and used them to test the hypothesis that the viability of iPSCs within these matrices could be rescued with appropriate biochemical cues inspired by proteins and integrins important for iPSC culture on Matrigel. Specifically, we selected a range of motifs inspired by iPSC binding to Matrigel, including laminin-derived IKVAV and YIGSR, α5β1-binding PHSRNG10RGDS, αvβ5-binding KKQRFRHRNRKG, and RGDS that is known to bind a variety of integrins for generally promoting cell adhesion. YIGSR and PHSRNG10RGDS resulted in the highest iPSC viability, where binding of β1 integrin was key, and these permissive compositions also allowed iPSC differentiation into neural progenitor cells (NPCs) (decreased oct4 expression and increased pax6 expression) in response to soluble factors. The resulting NPCs formed clusters of different sizes in response to each peptide, suggesting that matrix biochemical cues affect iPSC proliferation and clustering in 3D culture. In summary, we have established photopolymerizable synthetic matrices for the encapsulation, culture, and differentiation of iPSCs for studies of cell-matrix interactions and deployment in disease models.
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Affiliation(s)
- Elisa M Ovadia
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716, USA.
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20
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Muncie JM, Weaver VM. The Physical and Biochemical Properties of the Extracellular Matrix Regulate Cell Fate. Curr Top Dev Biol 2018; 130:1-37. [PMID: 29853174 DOI: 10.1016/bs.ctdb.2018.02.002] [Citation(s) in RCA: 159] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The extracellular matrix is a complex network of hydrated macromolecular proteins and sugars that, in concert with bound soluble factors, comprise the acellular stromal microenvironment of tissues. Rather than merely providing structural information to cells, the extracellular matrix plays an instructive role in development and is critical for the maintenance of tissue homeostasis. In this chapter, we review the composition of the extracellular matrix and summarize data illustrating its importance in embryogenesis, tissue-specific development, and stem cell differentiation. We discuss how the biophysical and biochemical properties of the extracellular matrix ligate specific transmembrane receptors to activate intracellular signaling that alter cell shape and cytoskeletal dynamics to modulate cell growth and viability, and direct cell migration and cell fate. We present examples describing how the extracellular matrix functions as a highly complex physical and chemical entity that regulates tissue organization and cell behavior through a dynamic and reciprocal dialogue with the cellular constituents of the tissue. We suggest that the extracellular matrix not only transmits cellular and tissue-level force to shape development and tune cellular activities that are key for coordinated tissue behavior, but that it is itself remodeled such that it temporally evolves to maintain the integrated function of the tissue. Accordingly, we argue that perturbations in extracellular matrix composition and structure compromise key developmental events and tissue homeostasis, and promote disease.
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Affiliation(s)
- Jonathon M Muncie
- Center for Bioengineering and Tissue Regeneration, University of California, San Francisco, CA, United States; Graduate Program in Bioengineering, University of California San Francisco and University of California Berkeley, San Francisco, CA, United States
| | - Valerie M Weaver
- Center for Bioengineering and Tissue Regeneration, University of California, San Francisco, CA, United States; Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, The Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA, United States.
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21
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Park MH, Kim MS, Yun JI, Choi JH, Lee E, Lee ST. Integrin Heterodimers Expressed on the Surface of Porcine Spermatogonial Stem Cells. DNA Cell Biol 2018; 37:253-263. [DOI: 10.1089/dna.2017.4035] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Min Hee Park
- Department of Animal Life Science, Kangwon National University, Chuncheon, Korea
| | - Min Seong Kim
- Department of Animal Life Science, Kangwon National University, Chuncheon, Korea
| | - Jung Im Yun
- Division of Animal Resource Science, Kangwon National University, Chuncheon, Korea
| | - Jung Hoon Choi
- College of Veterinary Medicine, Kangwon National University, Chuncheon, Korea
| | - Eunsong Lee
- College of Veterinary Medicine, Kangwon National University, Chuncheon, Korea
| | - Seung Tae Lee
- Department of Animal Life Science, Kangwon National University, Chuncheon, Korea
- Division of Applied Animal Science, Kangwon National University, Chuncheon, Korea
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22
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Hybrid-spheroids incorporating ECM like engineered fragmented fibers potentiate stem cell function by improved cell/cell and cell/ECM interactions. Acta Biomater 2017; 64:161-175. [PMID: 29037892 DOI: 10.1016/j.actbio.2017.10.022] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 09/13/2017] [Accepted: 10/11/2017] [Indexed: 02/08/2023]
Abstract
Extracellular matrix (ECM) microenvironment is critical for the viability, stemness, and differentiation of stem cells. In this study, we developed hybrid-spheroids of human turbinate mesenchymal stem cells (hTMSCs) by using extracellular matrix (ECM) mimicking fragmented fibers (FFs) for improvement of the viability and functions of hTMSCs. We prepared FFs with average size of 68.26 µm by partial aminolysis of poly L-lactide (PLLA) fibrous sheet (FS), which was coated with polydopamine for improved cell adhesion. The proliferation of hTMSCs within the hybrid-spheroids mixed with fragmented fibers was significantly increased as compared to that from the cell-only group. Cells and fragmented fibers were homogenously distributed with the presence of pore like empty spaces in the structure. LOX-1 staining revealed that the hybrid-spheroids improved the cell viability, which was potentially due to enhanced transport of oxygen through void space generated by engineered ECM. Transmission electron microscopy (TEM) analysis confirmed that cells within the hybrid-spheroid formed strong cell junctions and contacts with fragmented fibers. The expression of cell junction proteins including connexin 43 and E-cadherin was significantly upregulated in hybrid-spheroids by 16.53 ± 0.04 and 28.26 ± 0.11-fold greater than that from cell-only group. Similarly, expression of integrin α2, α5, and β1 was significantly enhanced at the same group by 25.72 ± 0.13, 27.48 ± 0.49, and 592.78 ± 0.06-fold, respectively. In addition, stemness markers including Oct-4, Nanog, and Sox2 were significantly upregulated in hybrid-spheroids by 96.56 ± 0.06, 158.95 ± 0.06, and 115.46 ± 0.47-fold, respectively, relative to the cell-only group. Additionally, hTMSCs within the hybrid-spheroids showed significantly greater osteogenic differentiation under osteogenic media conditions. Taken together, our hybrid-spheroids can be an ideal approach for stem cell expansion and serve as a potential carrier for bone regeneration. STATEMENT OF SIGNIFICANCE Cells are spatially arranged within extracellular matrix (ECM) and cell/ECM interactions are crucial for cellular functions. Here, we developed a hybrid-spheroid system incorporating engineered ECM prepared from fragmented electrospun fibers to tune stem cell functions. Conventionally prepared cell spheroids with large diameters (>200 µm) is often prone to hypoxia. In contrast, the hybrid-spheroids significantly enhanced viability and proliferation of human turbinate mesenchymal stem cells (hTMSCs) as compared to spheroid prepared from cell only. Under these conditions, the presence of fragmented fibers also improved maintenance of stemness of hTMSCs for longer time cultured in growth media and demonstrated significantly greater osteogenic differentiation under osteogenic media conditions. Thus, the hybrid-spheroids can be used as a delivery carrier for stem cell based therapy or a 3D culture model for in vitro assay.
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23
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Goldshmid R, Seliktar D. Hydrogel Modulus Affects Proliferation Rate and Pluripotency of Human Mesenchymal Stem Cells Grown in Three-Dimensional Culture. ACS Biomater Sci Eng 2017; 3:3433-3446. [DOI: 10.1021/acsbiomaterials.7b00266] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Revital Goldshmid
- The
Faculty of Biomedical Engineering and ‡The Interdisciplinary Program for
Biotechnology, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Dror Seliktar
- The
Faculty of Biomedical Engineering and ‡The Interdisciplinary Program for
Biotechnology, Technion-Israel Institute of Technology, Haifa 32000, Israel
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24
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Chen WW, Tjin MS, Chua AWC, Lee ST, Tay CY, Fong E. Probing the Role of Integrins in Keratinocyte Migration Using Bioengineered Extracellular Matrix Mimics. ACS APPLIED MATERIALS & INTERFACES 2017; 9:36483-36492. [PMID: 28967740 DOI: 10.1021/acsami.7b06959] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Bioengineered extracellular matrix (ECM) mimetic materials have tunable properties and can be engineered to elicit desirable cellular responses for wound repair and tissue regeneration. By incorporating relevant cell-instructive domains, bioengineered ECM mimics can be designed to provide well-defined ECM-specific cues to influence cell motility and differentiation. More importantly, bioengineered ECM surfaces are ideal platforms for studying cell-material interactions without the need to genetically alter the cells. Here, we showed that bioengineered ECM mimics can be employed to clarify the role of integrins in keratinocyte migration. Particularly, the roles of α5β1 and α3β1 in keratinocytes were examined, given their known importance in keratinocyte motility. Two recombinant proteins were constructed; each protein contains a functional domain taken from fibronectin (FN-mimic) and laminin-332 (LN-mimic), designed to bind α5β1 and α3β1, respectively. We examined how patient-derived primary human keratinocytes migrate when sparsely seeded as well as when allowed to move collectively. We found, consistently, that FN-mimic promoted cell migration while the LN-mimic did not support cell motility. We showed that, when keratinocytes utilize α5β1 integrins on FN-mimics, they were able to form stable focal adhesion plaques and stabilized lamellipodia. On the other hand, keratinocytes on LN-mimic utilized primarily α3β1 integrins for migration and, strikingly, cells were unable to activate Rac1 and form stable focal adhesion plaques. Taken together, employment of our bioengineered mimics has allowed us to clarify the roles of α5β1 and α3β1 integrins in keratinocyte migration, as well as further provided a mechanistic explanation for their differences.
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Affiliation(s)
- Wilhelm W Chen
- School of Materials Science and Engineering, Nanyang Technological University , N4.1, 50 Nanyang Avenue, Singapore 639798, Singapore
- Mechanobiology Institute, National University of Singapore , 5A Engineering Drive 1, Singapore 117411, Singapore
| | - Monica S Tjin
- Program in Cardiovascular and Metabolic Disorder, Duke-NUS Medical School , 8 College Road, Singapore 169857, Singapore
| | - Alvin W C Chua
- Department of Plastic Reconstructive & Aesthetic Surgery, Singapore General Hospital , Outram Road, Singapore 169608, Singapore
| | - Seng Teik Lee
- Department of Plastic Reconstructive & Aesthetic Surgery, Singapore General Hospital , Outram Road, Singapore 169608, Singapore
| | - Chor Yong Tay
- School of Materials Science and Engineering, Nanyang Technological University , N4.1, 50 Nanyang Avenue, Singapore 639798, Singapore
- School of Biological Sciences, Nanyang Technological University , 60 Nanyang Drive, Singapore 637551, Singapore
| | - Eileen Fong
- School of Materials Science and Engineering, Nanyang Technological University , N4.1, 50 Nanyang Avenue, Singapore 639798, Singapore
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25
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Abstract
PURPOSE OF REVIEW Human pluripotent stem cells (hPSCs) are anchorage-dependent cells that can be cultured on a variety of matrices and express integrins and the machinery for integrin signaling. Until recently, there has been limited understanding of exactly how integrin signaling regulates pluripotent stem cell (PSC) behavior. This review summarizes our knowledge of how integrins and focal adhesion kinase (FAK) regulate different aspects of hPSC biology. RECENT FINDINGS The latest research suggests that mouse and human embryonic stem cells utilize similar integrin signaling players but with different biological outcomes, reflecting the known developmental difference in their pluripotent status. Notably, attachment cues via FAK signaling are crucial for hPSCs survival and pluripotency maintenance. FAK may be found cortically but also in the nucleus of hPSCs intersecting core pluripotency networks. SUMMARY Integrins and FAK have been consigned to the conventional role of cell adhesion receptor systems in PSCs. This review highlights data indicating that they are firmly integrated in pluripotency circuits, with implications for both research PSC culture and scale up and use in clinical applications.
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Affiliation(s)
- Loriana Vitillo
- Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology Medicine and Health, University of Manchester, Michael Smith Building, Oxford Rd, Manchester, M13 9PT UK
| | - Susan J. Kimber
- Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology Medicine and Health, University of Manchester, Michael Smith Building, Oxford Rd, Manchester, M13 9PT UK
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26
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Li S, Nih LR, Bachman H, Fei P, Li Y, Nam E, Dimatteo R, Carmichael ST, Barker TH, Segura T. Hydrogels with precisely controlled integrin activation dictate vascular patterning and permeability. NATURE MATERIALS 2017; 16:953-961. [PMID: 28783156 PMCID: PMC5809173 DOI: 10.1038/nmat4954] [Citation(s) in RCA: 120] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 06/30/2017] [Indexed: 05/05/2023]
Abstract
Integrin binding to bioengineered hydrogel scaffolds is essential for tissue regrowth and regeneration, yet not all integrin binding can lead to tissue repair. Here, we show that through engineering hydrogel materials to promote α3/α5β1 integrin binding, we can promote the formation of a space-filling and mature vasculature compared with hydrogel materials that promote αvβ3 integrin binding. In vitro, α3/α5β1 scaffolds promoted endothelial cells to sprout and branch, forming organized extensive networks that eventually reached and anastomosed with neighbouring branches. In vivo, α3/α5β1 scaffolds delivering vascular endothelial growth factor (VEGF) promoted non-tortuous blood vessel formation and non-leaky blood vessels by 10 days post-stroke. In contrast, materials that promote αvβ3 integrin binding promoted endothelial sprout clumping in vitro and leaky vessels in vivo. This work shows that precisely controlled integrin activation from a biomaterial can be harnessed to direct therapeutic vessel regeneration and reduce VEGF-induced vascular permeability in vivo.
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Affiliation(s)
- Shuoran Li
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095, USA
| | - Lina R. Nih
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095, USA
| | - Haylee Bachman
- Department of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Peng Fei
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, China
- Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, CA 90095, USA
| | - Yilei Li
- Department of Electrical Engineering, University of California, Los Angeles, CA 90095, USA
- NovuMind Inc., Santa Clara, CA, 95054, USA
| | - Eunwoo Nam
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095, USA
| | - Robert Dimatteo
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095, USA
| | - S. Thomas Carmichael
- Department of Medicine, Neurology, University of California, Los Angeles, CA 90095, USA
| | - Thomas H. Barker
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA 22908, USA
| | - Tatiana Segura
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095, USA
- Department of Medicine, Dermatology, University of California, Los Angeles, CA 90095, USA
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA
- Corresponding author: Prof. Tatiana Segura Tel.: +1-310-206-3980,
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27
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Islami M, Mortazavi Y, Soleimani M, Nadri S. In vitro expansion of CD 133+ cells derived from umbilical cord blood in poly-L-lactic acid (PLLA) scaffold coated with fibronectin and collagen. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2017; 46:1025-1033. [PMID: 28782391 DOI: 10.1080/21691401.2017.1358733] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
CONTEXT Due to their renewal and potency, umbilical cord blood (UCB) stem cells have the ability to proliferate and serve as an attractive alternative source for bone marrow transplantation. However, insufficient number of haematopoietic stem cells (HSCs) in UCB is still a major constraint in clinical applications. OBJECTIVE In vitro expansion of stem cells on fibronectin (Fn)-coated poly-L-lactic acid (PLLA) scaffold can be a proper way to overcome this limitation. MATERIALS AND METHOD UCB CD133 + cells were isolated by magnetic cell sorting (MACS), and then the flowcytometry method was used for analysing CD133 + cells. Confirmed cells were seeded on the Fn-coated PLLA scaffold; also, collagen-coated PLLA scaffold, PLLA scaffold and two-dimensional (2D) culture system were expanded for 7 days. During this time, we used the flowcytometric method for analysing CD133 + cells and real-time PCR for the expression level of CXCR4 gene. The number of total cells and CD133 + cells, as well as MTT assay and colony-forming unit (CFU) assay were evaluated. RESULTS Flowcytometry data indicated that the purity of CD133 + before expansion was 93%. After 7 days, there was higher number of CD133 + cells on the Fn-coated PLLA scaffold compared to other groups. Moreover, results of MTT and colony assays showed higher viability and proliferation of CD133 + on the Fn-coated PLLA scaffold. Also, the quantity of CXCR4 gene expression increased compared to other groups. DISCUSSION The Fn-coated scaffold was the most effective scaffold for proliferation and improved the adhesiveness to the scaffold. CONCLUSION The Fn-coated PLLA scaffold could be a suitable in vitro mimicry niche over a 2D system.
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Affiliation(s)
- Maryam Islami
- a Medical Biotechnology and Nanotechnology Department , Zanjan University of Medical Sciences , Zanjan , Iran
| | - Yousef Mortazavi
- a Medical Biotechnology and Nanotechnology Department , Zanjan University of Medical Sciences , Zanjan , Iran.,b Department of Pathology, Cancer Gene Therapy Research Center , Zanjan University of Medical Sciences , Zanjan , Iran
| | - Masoud Soleimani
- c Hematology Department , Tarbiat Modares University , Tehran , Iran
| | - Samad Nadri
- a Medical Biotechnology and Nanotechnology Department , Zanjan University of Medical Sciences , Zanjan , Iran
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Regulation of human nucleus pulposus cells by peptide-coupled substrates. Acta Biomater 2017; 55:100-108. [PMID: 28433788 DOI: 10.1016/j.actbio.2017.04.019] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Revised: 03/20/2017] [Accepted: 04/18/2017] [Indexed: 12/12/2022]
Abstract
Nucleus pulposus (NP) cells are derived from the notochord and differ from neighboring cells of the intervertebral disc in phenotypic marker expression and morphology. Adult human NP cells lose this phenotype and morphology with age in a pattern that contributes to progressive disc degeneration and pathology. Select laminin-mimetic peptide ligands and substrate stiffnesses were examined for their ability to regulate human NP cell phenotype and biosynthesis through the expression of NP-specific markers aggrecan, N-cadherin, collagen types I and II, and GLUT1. Peptide-conjugated substrates demonstrated an ability to promote expression of healthy NP-specific markers, as well as increased biosynthetic activity. We show an ability to re-express markers of the juvenile NP cell and morphology through control of peptide presentation and stiffness on well-characterized polyacrylamide substrates. NP cells cultured on surfaces conjugated with α3 integrin receptor peptides P4 and P678, and on α2, α5, α6, β1 integrin-recognizing peptide AG10, show increased expression of aggrecan, N-cadherin, and types I and II collagen, suggesting a healthier, more juvenile-like phenotype. Multi-cell cluster formation was also observed to be more prominent on peptide-conjugated substrates. These findings indicate a critical role for cell-matrix interactions with specific ECM-mimetic peptides in supporting and maintaining a healthy NP cell phenotype and bioactivity. STATEMENT OF SIGNIFICANCE NP cells reside in a laminin-rich environment that deteriorates with age, including a loss of water content and changes in the extracellular matrix (ECM) structure that may lead to the development of a degenerated IVD. There is great interest in methods to re-express healthy, biosynthetically active NP cells using laminin-derived biomimetic peptides toward the goal of using autologous cell sources for tissue regeneration. Here, we describe a novel study utilizing several laminin mimetic peptides conjugated to polyacrylamide gels that are able to support an immature, healthy NP phenotype after culture on "soft" peptide gels. These findings can support future studies in tissue regeneration where cells may be directed to a desired regenerative phenotype using niche-specific ECM peptides.
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Riahi N, Liberelle B, Henry O, De Crescenzo G. Impact of RGD amount in dextran-based hydrogels for cell delivery. Carbohydr Polym 2017; 161:219-227. [DOI: 10.1016/j.carbpol.2017.01.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 12/21/2016] [Accepted: 01/01/2017] [Indexed: 01/01/2023]
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Choi MY, Kim JT, Lee WJ, Lee Y, Park KM, Yang YI, Park KD. Engineered extracellular microenvironment with a tunable mechanical property for controlling cell behavior and cardiomyogenic fate of cardiac stem cells. Acta Biomater 2017; 50:234-248. [PMID: 28063988 DOI: 10.1016/j.actbio.2017.01.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 12/26/2016] [Accepted: 01/01/2017] [Indexed: 12/12/2022]
Abstract
Endogenous cardiac stem cells (CSCs) are known to play a certain role in the myocardial homeostasis of the adult heart. The extracellular matrix (ECM) surrounding CSCs provides mechanical signals to regulate a variety of cell behaviors, yet the impact in the adult heart of these mechanical properties of ECM on CSC renewal and fate decisions is mostly unknown. To elucidate CSC mechanoresponses at the individual cell and myocardial level, we used the sol-to-gel transitional gelatin-poly(ethylene glycol)-tyramine (GPT) hydrogel with a tunable mechanical property to construct a three-dimensional (3D) matrix for culturing native myocardium and CSCs. The elastic modulus of the GPT hydrogel was controlled by adjusting cross-linking density using hydrogen peroxide. The GPT hydrogel showed an ability to transduce integrin-mediated signals into the myocardium and to permit myocardial homeostatic processes in vitro, including CSC migration and proliferation into the hydrogel from the myocardium. Decreasing the elastic modulus of the hydrogel resulted in upregulation of phosphorylated integrin-mediated signaling molecules in CSCs, which were associated with significant increases in cell spreading, migration, and proliferation of CSCs in a modulus-dependent manner. However, increasing the elastic modulus of hydrogel induced the arrest of cell growth but led to upregulation of cardiomyocyte-associated mRNAs in CSCs. This work demonstrates that tunable 3D-engineered microenvironments created by GPT hydrogel are able to control CSC behavior and to direct cardiomyogenic fate. Our system may also be appropriate for studying the mechanoresponse of CSCs in a 3D context as well as for developing therapeutic strategies for in situ myocardial regeneration. STATEMENT OF SIGNIFICANCE The extracellular matrix (ECM) provides a physical framework of myocardial niches in which endogenous cardiac stem cells (CSCs) reside, renew, differentiate, and replace cardiac cells. Interactions between ECM and CSCs might be critical for the maintenance of myocardial homeostasis in the adult heart. Yet most studies done so far have used irrelevant cell types and have been performed at the individual cell level, none able to reflect the in vivo situation. By the use of a chemically defined hydrogel to create a tunable 3D microenvironment, we succeeded in controlling CSC behavior at the myocardial and individual cell level and directing the cardiomyogenic fate. Our work may provide insight into the design of biomaterials for in situ myocardial regeneration as well as for tissue engineering.
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Baek S, Han NR, Yun JI, Hwang JY, Kim M, Park CK, Lee E, Lee ST. Effects of Culture Dimensions on Maintenance of Porcine Inner Cell Mass-Derived Cell Self-Renewal. Mol Cells 2017; 40:117-122. [PMID: 28196411 PMCID: PMC5339502 DOI: 10.14348/molcells.2017.2223] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 01/04/2017] [Accepted: 01/06/2017] [Indexed: 01/02/2023] Open
Abstract
Despite the fact that porcine embryonic stem cells (ESCs) are a practical study tool, in vitro long-term maintenance of these cells is difficult in a two-dimensional (2D) microenvironment using cellular niche or extracellular matrix proteins. However, a three-dimensional (3D) microenvironment, similar to that enclosing the inner cell mass of the blastocyst, may improve in vitro maintenance of self-renewal. Accordingly, as a first step toward constructing a 3D microenvironment optimized to maintain porcine ESC self-renewal, we investigated different culture dimensions for porcine ICM-derived cells to enhance the maintenance of self-renewal. Porcine ICM-derived cells were cultured in agarose-based 3D hydrogel with self-renewal-friendly mechanics and in 2D culture plates with or without feeder cells. Subsequently, the effects of the 3D microenvironment on maintenance of self-renewal were identified by analyzing colony formation and morphology, alkaline phosphatase (AP) activity, and transcriptional and translational regulation of self-renewal-related genes. The 3D microenvironment using a 1.5% (w/v) agarose-based 3D hydrogel resulted in significantly more colonies with stereoscopic morphology, significantly improved AP activity, and increased protein expression of self-renewal-related genes compared to those in the 2D microenvironment. These results demonstrate that self-renewal of porcine ICM-derived cells can be maintained more effectively in a 3D microenvironment than in a 2D microenvironment. These results will help develop novel culture systems for ICM-derived cells derived from diverse species, which will contribute to stimulating basic and applicable studies related to ESCs.
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Affiliation(s)
- Song Baek
- Department of Animal Life Science, Kangwon National University, Chuncheon 24341,
Korea
| | - Na Rae Han
- Department of Animal Life Science, Kangwon National University, Chuncheon 24341,
Korea
| | - Jung Im Yun
- Division of Animal Resource Science, Kangwon National University, Chuncheon 24341,
Korea
| | - Jae Yeon Hwang
- Department of Cellular and Molecular Physiology, Yale School of Medicine, New Haven 06510,
USA
| | - Minseok Kim
- Animal Nutrition and Physiology Team, National Institute of Animal Science, RDA, Wanju 55365,
Korea
| | - Choon Keun Park
- Department of Animal Life Science, Kangwon National University, Chuncheon 24341,
Korea
- Division of Applied Animal Science, Kangwon National University, Chuncheon 24341,
Korea
| | - Eunsong Lee
- College of Veterinary Medicine, Kangwon National University, Chuncheon 24341,
Korea
| | - Seung Tae Lee
- Department of Animal Life Science, Kangwon National University, Chuncheon 24341,
Korea
- Division of Applied Animal Science, Kangwon National University, Chuncheon 24341,
Korea
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Mawad D, Figtree G, Gentile C. Current Technologies Based on the Knowledge of the Stem Cells Microenvironments. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 1041:245-262. [DOI: 10.1007/978-3-319-69194-7_13] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Rodda AE, Ercole F, Glattauer V, Nisbet DR, Healy KE, Dove AP, Meagher L, Forsythe JS. Controlling integrin-based adhesion to a degradable electrospun fibre scaffold via SI-ATRP. J Mater Chem B 2016; 4:7314-7322. [PMID: 32263733 DOI: 10.1039/c6tb02444k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
While polycaprolactone (PCL) and similar polyesters are commonly used as degradable scaffold materials in tissue engineering and related applications, non-specific adsorption of environmental proteins typically precludes any control over the signalling pathways that are activated during cell adhesion to these materials. Here we describe the preparation of PCL-based fibres that facilitate cell adhesion through well-defined pathways while preventing adhesion via adsorbed proteins. Surface-initiated atom transfer radical polymerisation (SI-ATRP) was used to graft a protein-resistant polymer brush coating from the surface of fibres, which had been electrospun from a brominated PCL macroinitiator. This coating also provided alkyne functional groups for the attachment of specific signalling molecules via the copper-mediated azide-alkyne click reaction; in this case, a cyclic RGD peptide with high affinity for αvβ3 integrins. Mesenchymal stem cells were shown to attach to the fibres via the peptide, but did not attach in its absence, nor when blocked with soluble peptide, demonstrating the effective control of cell adhesion pathways.
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Affiliation(s)
- Andrew E Rodda
- Department of Materials Science and Engineering, and Monash Institute for Medical Engineering, Monash University, Wellington Rd, Clayton 3800, Victoria, Australia.
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Improved human endometrial stem cells differentiation into functional hepatocyte-like cells on a glycosaminoglycan/collagen-grafted polyethersulfone nanofibrous scaffold. J Biomed Mater Res B Appl Biomater 2016; 105:2516-2529. [DOI: 10.1002/jbm.b.33758] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 06/13/2016] [Accepted: 07/11/2016] [Indexed: 12/11/2022]
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Hilderbrand AM, Ovadia EM, Rehmann MS, Kharkar PM, Guo C, Kloxin AM. Biomaterials for 4D stem cell culture. CURRENT OPINION IN SOLID STATE & MATERIALS SCIENCE 2016; 20:212-224. [PMID: 28717344 PMCID: PMC5510611 DOI: 10.1016/j.cossms.2016.03.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Stem cells reside in complex three-dimensional (3D) environments within the body that change with time, promoting various cellular functions and processes such as migration and differentiation. These complex changes in the surrounding environment dictate cell fate yet, until recently, have been challenging to mimic within cell culture systems. Hydrogel-based biomaterials are well suited to mimic aspects of these in vivo environments, owing to their high water content, soft tissue-like elasticity, and often-tunable biochemical content. Further, hydrogels can be engineered to achieve changes in matrix properties over time to better mimic dynamic native microenvironments for probing and directing stem cell function and fate. This review will focus on techniques to form hydrogel-based biomaterials and modify their properties in time during cell culture using select addition reactions, cleavage reactions, or non-covalent interactions. Recent applications of these techniques for the culture of stem cells in four dimensions (i.e., in three dimensions with changes over time) also will be discussed for studying essential stem cell processes.
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Affiliation(s)
- Amber M. Hilderbrand
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716, USA
| | - Elisa M. Ovadia
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716, USA
| | - Matthew S. Rehmann
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716, USA
| | - Prathamesh M. Kharkar
- Department of Materials Science and Engineering, University of Delaware, Newark DE 19716, USA
| | - Chen Guo
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716, USA
| | - April M. Kloxin
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716, USA
- Department of Materials Science and Engineering, University of Delaware, Newark DE 19716, USA
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Lee M, Ahn JI, Ahn JY, Yang WS, Hubbell JA, Lim JM, Lee ST. Difference in suitable mechanical properties of three-dimensional, synthetic scaffolds for self-renewing mouse embryonic stem cells of different genetic backgrounds. J Biomed Mater Res B Appl Biomater 2016; 105:2261-2268. [PMID: 27459401 DOI: 10.1002/jbm.b.33763] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Revised: 06/10/2016] [Accepted: 07/11/2016] [Indexed: 11/12/2022]
Abstract
We evaluated whether the genetic background of embryonic stem cells (ESCs) affects the properties suitable for three-dimensional (3D) synthetic scaffolds for cell self-renewal. Inbred R1 and hybrid B6D2F1 mouse ESC lines were cultured for 7 days in hydrogel scaffolds with different properties derived from conjugating 7.5, 10, 12.5, or 15% (wt/vol) vinylsulfone-functionalized three-, four-, or eight-arm polyethylene glycol (PEG) with dicysteine-containing crosslinkers with an intervening matrix metalloproteinase-specific cleavage sites. Cell proliferation and expression of self-renewal-related genes and proteins by ESCs cultured in feeder-free or containing 2D culture plate or 3D hydrogel were monitored. As a preliminary experiment, the E14 ESC-customized synthetic 3D microenvironment did not maintain self-renewal of either the R1 or B6D2F1 ESCs. The best R1 cell proliferation (10.04 vs. 0.16-4.39; p < 0.0001) was observed in the four-arm 7.5% PEG-based hydrogels than those with other properties, whereas the F1 ESCs showed better proliferation when they were embedded in the three-arm 10% hydrogels. Self-renewal-related gene and protein expression by ESCs after feeder-free 3D culture was generally maintained compared with the feeder-containing 2D culture, but expression patterns and quantities differed. However, the feeder-free 3D culture yielded better expression than the feeder-free 2D culture. In conclusion, genetic background determined the suitability of hydrogel scaffolds for self-renewal of ESCs, which requires customization for the mechanical properties of each cell line. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 2261-2268, 2017.
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Affiliation(s)
- Myungook Lee
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 151-921, Korea
| | - Jong Il Ahn
- Research Institutes of Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Korea
| | - Ji Yeon Ahn
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 151-921, Korea
| | - Woo Sub Yang
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 151-921, Korea
| | - Jeffrey A Hubbell
- Institute of Bioengineering (IBI) and Institute of Chemical Sciences and Engineering (ISIC), School of Life Sciences, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland; Institute for Molecular Engineering, University of Chicago, IL 60637, USA
| | - Jeong Mook Lim
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 151-921, Korea.,Research Institutes of Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Korea
| | - Seung Tae Lee
- Department of Animal Life Science and Division of Applied Animal Science, Kangwon National University, Chuncheon, 200-701, Korea
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Samardzija C, Luwor RB, Quinn MA, Kannourakis G, Findlay JK, Ahmed N. Coalition of Oct4A and β1 integrins in facilitating metastasis in ovarian cancer. BMC Cancer 2016; 16:432. [PMID: 27390927 PMCID: PMC4939035 DOI: 10.1186/s12885-016-2458-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2015] [Accepted: 06/24/2016] [Indexed: 12/16/2022] Open
Abstract
Background Ovarian cancer is a metastatic disease and one of the leading causes of gynaecology malignancy-related deaths in women. Cancer stem cells (CSCs) are key contributors of cancer metastasis and relapse. Integrins are a family of cell surface receptors which allow interactions between cells and their surrounding microenvironment and play a fundamental role in promoting metastasis. This study investigates the molecular mechanism which associates CSCs and integrins in ovarian cancer metastasis. Methods The expression of Oct4A in high-grade serous ovarian tumors and normal ovaries was determined by immunofluorescence analysis. The functional role of Oct4A was evaluated by generating stable knockdown (KD) of Oct4A clones in an established ovarian cancer cell line HEY using shRNA-mediated silencing. The expression of integrins in cell lines was evaluated by flow cytometry. Spheroid forming ability, adhesion and the activities of matrix metalloproteinases 9/2 (MMP-9/2) was measured by in vitro functional assays and gelatin zymography. These observations were further validated in in vivo mouse models using Balb/c nu/nu mice. Results We report significantly elevated expression of Oct4A in high-grade serous ovarian tumors compared to normal ovarian tissues. The expression of Oct4A in ovarian cancer cell lines correlated with their CSC-related sphere forming abilities. The suppression of Oct4A in HEY cells resulted in a significant diminution of integrin β1 expression and associated α5 and α2 subunits compared to vector control cells. This was associated with a reduced adhesive ability on collagen and fibronectin and decreased secretion of pro-MMP2 in Oct4A KD cells compared to vector control cells. In vivo, Oct4A knock down (KD) cells produced tumors which were significantly smaller in size and weight compared to tumors derived from vector control cells. Immunohistochemical analyses of Oct4A KD tumor xenografts demonstrated a significant loss of cytokeratin 7 (CK7), Glut-1 as well as CD34 and CD31 compared to vector control cell-derived xenografts. Conclusion The expression of Oct4A may be crucial to promote and sustain integrin-mediated extracellular matrix (ECM) remodeling requisite for tumor metastasis in ovarian cancer patients.
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Affiliation(s)
- Chantel Samardzija
- Department of Obstetrics and Gynaecology, University of Melbourne, Parkville, Melbourne, VIC, 3052, Australia
| | - Rodney B Luwor
- Department of Surgery, University of Melbourne, Parkville, Melbourne, VIC, 3052, Australia
| | - Michael A Quinn
- Department of Obstetrics and Gynaecology, University of Melbourne, Parkville, Melbourne, VIC, 3052, Australia
| | - George Kannourakis
- Fiona Elsey Cancer Research Institute, Suites 23-26, 106-110 Lydiard Street South, Ballarat Technology Central Park, Ballarat, 3353, Australia.,Federation University Australia, Ballarat, VIC, 3010, Australia
| | - Jock K Findlay
- Department of Obstetrics and Gynaecology, University of Melbourne, Parkville, Melbourne, VIC, 3052, Australia.,The Hudson Institute of Medical Research, Clayton, Melbourne, VIC, 3168, Australia
| | - Nuzhat Ahmed
- Department of Obstetrics and Gynaecology, University of Melbourne, Parkville, Melbourne, VIC, 3052, Australia. .,Fiona Elsey Cancer Research Institute, Suites 23-26, 106-110 Lydiard Street South, Ballarat Technology Central Park, Ballarat, 3353, Australia. .,Federation University Australia, Ballarat, VIC, 3010, Australia. .,The Hudson Institute of Medical Research, Clayton, Melbourne, VIC, 3168, Australia.
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Adnan N, Mie M, Haque A, Hossain S, Mashimo Y, Akaike T, Kobatake E. Construction of a Defined Biomimetic Matrix for Long-Term Maintenance of Mouse Induced Pluripotent Stem Cells. Bioconjug Chem 2016; 27:1599-605. [PMID: 27269811 DOI: 10.1021/acs.bioconjchem.6b00141] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The existing in vitro culture systems often use undefined and animal-derived components for the culture of pluripotent stem cells. Artificial bioengineered peptides have the potential to become alternatives to these components of extracellular matrix (ECM). Integrins and cadherins are two cell adhesion proteins important for stem cell self-renewal, differentiation, and phenotype stability. In the present study, we sought to mimic the physico-biochemical properties of natural ECMs that allow self-renewal of mouse induced pluripotent stem cells (iPSCs). We develop a genetically engineered ECM protein (ERE-CBP) that contains (i) an integrin binding peptide sequence (RGD/R), (ii) an E-/N-cadherin binding peptide sequence (SWELYYPLRANL/CBP), and (iii) 12 repeats of APGVGV elastin-like polypeptides (ELPs/E).While ELPs allow efficient coating by binding to nontreated hydrophobic tissue culture plates, RGD/R and CBP support integrin- and cadherin-dependent cell attachment, respectively. Mouse iPSCs on this composite matrix exhibit a more compact phenotype compared to cells on control gelatin substrate. We also demonstrated that the ERE-CBP supports proliferation and long-term self-renewal of mouse iPSCs for up to 17 passages without GSK3β (CHIR99021) and Erk (PD0325901) inhibitors. Overall, our engineered ECM protein, which is cost-effective to produce in prokaryotic origin and flexible to modify with other cell adhesion peptides or growth factors, provides a novel approach for expansion of mouse iPSCs in vitro.
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Affiliation(s)
- Nihad Adnan
- Department of Environmental Chemistry and Engineering, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology , Yokohama, 226-8502, Japan
| | - Masayasu Mie
- Department of Environmental Chemistry and Engineering, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology , Yokohama, 226-8502, Japan
| | - Amranul Haque
- Department of Biomedical Engineering, University of California Davis , Davis, California 95616, United States
| | - Sharif Hossain
- Biomaterials Center for Regenerative Medical Engineering, Foundation for Advancement of International Science , Tsukuba, 305-0821, Japan
| | - Yasumasa Mashimo
- Department of Environmental Chemistry and Engineering, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology , Yokohama, 226-8502, Japan
| | - Toshihiro Akaike
- Biomaterials Center for Regenerative Medical Engineering, Foundation for Advancement of International Science , Tsukuba, 305-0821, Japan
| | - Eiry Kobatake
- Department of Environmental Chemistry and Engineering, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology , Yokohama, 226-8502, Japan
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Amer LD, Bryant SJ. The In Vitro and In Vivo Response to MMP-Sensitive Poly(Ethylene Glycol) Hydrogels. Ann Biomed Eng 2016; 44:1959-69. [PMID: 27080375 PMCID: PMC5577801 DOI: 10.1007/s10439-016-1608-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 04/02/2016] [Indexed: 12/28/2022]
Abstract
Enzyme-sensitive hydrogels are a promising class of materials for cell encapsulation and tissue engineering because their ability to be degraded by cell-secreted factors. However, it is well known that nearly all synthetic biomaterials elicit a foreign body response (FBR) upon implantation. Therefore, this study aimed to evaluate the in vitro and in vivo response to an enzyme-sensitive hydrogel. Hydrogels were formed from poly(ethylene glycol) with the peptide crosslinker, C-VPLS↓LYSG-C, which is susceptible to matrix metalloproteinases 2 and 9. We evaluated the hydrogel by exogenously delivered enzymes, encapsulated mesenchymal stem cells as a tissue engineering relevant cell type, and by macrophage-secreted factors in vitro and for the FBR through macrophage attachment in vitro and in a subcutaneous mouse model. These hydrogels rapidly degraded upon exposure to exogenous MMP-2 and to lesser degree with MMP-9. Encapsulated mesenchymal stem cells were capable of degrading the hydrogels via matrix metalloproteinases. Inflammatory macrophages were confirmed to attach to the hydrogels, but were not capable of rapidly degrading the hydrogels. In vivo, these hydrogels remained intact after 4 weeks and exhibited a classic FBR with inflammatory cells at the hydrogel surface and a fibrous capsule. In summary, these findings suggest that while this MMP-2/9 sensitive hydrogel is readily degraded in vitro, it does not undergo rapid degradation by the FBR. Thus, the long term stability of these hydrogels in vivo coupled with the ability for encapsulated cells to degrade the hydrogel makes them promising materials for tissue engineering.
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Affiliation(s)
- Luke D Amer
- Department of Chemical and Biological Engineering, University of Colorado, 3415 Colorado Ave, UCB 596, Boulder, CO, 80303, USA
- BioFrontiers Institute, University of Colorado, 3415 Colorado Avenue, Boulder, CO, 80303, USA
| | - Stephanie J Bryant
- Department of Chemical and Biological Engineering, University of Colorado, 3415 Colorado Ave, UCB 596, Boulder, CO, 80303, USA.
- BioFrontiers Institute, University of Colorado, 3415 Colorado Avenue, Boulder, CO, 80303, USA.
- Material Science and Engineering Program, University of Colorado, 3415 Colorado Avenue, Boulder, CO, 80303, USA.
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Rosch JC, Hollmann EK, Lippmann ES. In vitro selection technologies to enhance biomaterial functionality. Exp Biol Med (Maywood) 2016; 241:962-71. [PMID: 27188514 DOI: 10.1177/1535370216647182] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Cells make decisions and fate choices based in part on cues they receive from their external environment. Factors that affect the interpretation of these cues include the soluble proteins that are present at any given time, the cell surface receptors that are available to bind these proteins, and the relative affinities of the soluble proteins for their cognate receptors. Researchers have identified many of the biological motifs responsible for the high-affinity interactions between proteins and their receptors, and subsequently incorporated these motifs into biomaterials to elicit control over cell behavior. Common modes of control include localized sequestration of proteins to improve bioavailability and direct inhibition or activation of a receptor by an immobilized peptide or protein. However, naturally occurring biological motifs often possess promiscuous affinity for multiple proteins and receptors or lack programmable actuation in response to dynamic stimuli, thereby limiting the amount of control they can exert over cellular decisions. These natural motifs only represent a small fraction of the biological diversity that can be assayed by in vitro selection strategies, and the discovery of "artificial" motifs with varying affinity, specificity, and functionality could greatly expand the repertoire of engineered biomaterial properties. This minireview provides a brief summary of classical and emerging techniques in peptide phage display and nucleic acid aptamer selections and discusses prospective applications in the areas of cell adhesion, angiogenesis, neural regeneration, and immune modulation.
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Affiliation(s)
- Jonah C Rosch
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37235, USA
| | - Emma K Hollmann
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37235, USA
| | - Ethan S Lippmann
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37235, USA
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41
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Caiazzo M, Okawa Y, Ranga A, Piersigilli A, Tabata Y, Lutolf MP. Defined three-dimensional microenvironments boost induction of pluripotency. NATURE MATERIALS 2016; 15:344-52. [PMID: 26752655 DOI: 10.1038/nmat4536] [Citation(s) in RCA: 201] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 12/08/2015] [Indexed: 05/25/2023]
Abstract
Since the discovery of induced pluripotent stem cells (iPSCs), numerous approaches have been explored to improve the original protocol, which is based on a two-dimensional (2D) cell-culture system. Surprisingly, nothing is known about the effect of a more biologically faithful 3D environment on somatic-cell reprogramming. Here, we report a systematic analysis of how reprogramming of somatic cells occurs within engineered 3D extracellular matrices. By modulating microenvironmental stiffness, degradability and biochemical composition, we have identified a previously unknown role for biophysical effectors in the promotion of iPSC generation. We find that the physical cell confinement imposed by the 3D microenvironment boosts reprogramming through an accelerated mesenchymal-to-epithelial transition and increased epigenetic remodelling. We conclude that 3D microenvironmental signals act synergistically with reprogramming transcription factors to increase somatic plasticity.
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Affiliation(s)
- Massimiliano Caiazzo
- Laboratory of Stem Cell Bioengineering, Institute of Bioengineering, School of Life Sciences (SV) and School of Engineering (STI), Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Yuya Okawa
- Laboratory of Stem Cell Bioengineering, Institute of Bioengineering, School of Life Sciences (SV) and School of Engineering (STI), Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Adrian Ranga
- Laboratory of Stem Cell Bioengineering, Institute of Bioengineering, School of Life Sciences (SV) and School of Engineering (STI), Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | | | - Yoji Tabata
- Laboratory of Stem Cell Bioengineering, Institute of Bioengineering, School of Life Sciences (SV) and School of Engineering (STI), Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Matthias P Lutolf
- Laboratory of Stem Cell Bioengineering, Institute of Bioengineering, School of Life Sciences (SV) and School of Engineering (STI), Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
- Institute of Chemical Sciences and Engineering, School of Basic Science (SB), EPFL, 1015 Lausanne, Switzerland
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42
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Lee H, Nam D, Choi JK, Araúzo-Bravo MJ, Kwon SY, Zaehres H, Lee T, Park CY, Kang HW, Schöler HR, Kim JB. Establishment of feeder-free culture system for human induced pluripotent stem cell on DAS nanocrystalline graphene. Sci Rep 2016; 6:20708. [PMID: 26846167 PMCID: PMC4742916 DOI: 10.1038/srep20708] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 01/11/2016] [Indexed: 12/12/2022] Open
Abstract
The maintenance of undifferentiated human pluripotent stem cells (hPSC) under
xeno-free condition requires the use of human feeder cells or extracellular matrix
(ECM) coating. However, human-derived sources may cause human pathogen contamination
by viral or non-viral agents to the patients. Here we demonstrate feeder-free and
xeno-free culture system for hPSC expansion using diffusion assisted synthesis-grown
nanocrystalline graphene (DAS-NG), a synthetic non-biological nanomaterial which
completely rule out the concern of human pathogen contamination. DAS-NG exhibited
advanced biocompatibilities including surface nanoroughness, oxygen containing
functional groups and hydrophilicity. hPSC cultured on DAS-NG could maintain
pluripotency in vitro and in vivo, and especially cell
adhesion-related gene expression profile was comparable to those of cultured on
feeders, while hPSC cultured without DAS-NG differentiated spontaneously with high
expression of somatic cell-enriched adhesion genes. This feeder-free and xeno-free
culture method using DAS-NG will facilitate the generation of clinical-grade
hPSC.
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Affiliation(s)
- Hyunah Lee
- Hans Schöler Stem Cell Research Center (HSSCRC), School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), 44919 Ulsan, South Korea
| | - Donggyu Nam
- Hans Schöler Stem Cell Research Center (HSSCRC), School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), 44919 Ulsan, South Korea
| | - Jae-Kyung Choi
- SMEs Support Center, Korea Institute of Science and Technology Information, 48058 Busan, South Korea
| | - Marcos J Araúzo-Bravo
- Group of Computational Biology and Bioinformatics, Biodonostia Health Research Institute, 20014 San Sebastián, Spain.,IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
| | - Soon-Yong Kwon
- Hans Schöler Stem Cell Research Center (HSSCRC), School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), 44919 Ulsan, South Korea.,School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), 44919 Ulsan, South Korea
| | - Holm Zaehres
- Department of Cell and Developmental Biology, Max Planck Institute for Molecular Biomedicine, Röntgenstrasse 20, 48149 Münster, Germany
| | - Taehee Lee
- Hans Schöler Stem Cell Research Center (HSSCRC), School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), 44919 Ulsan, South Korea
| | - Chan Young Park
- Hans Schöler Stem Cell Research Center (HSSCRC), School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), 44919 Ulsan, South Korea
| | - Hyun-Wook Kang
- Hans Schöler Stem Cell Research Center (HSSCRC), School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), 44919 Ulsan, South Korea
| | - Hans R Schöler
- Department of Cell and Developmental Biology, Max Planck Institute for Molecular Biomedicine, Röntgenstrasse 20, 48149 Münster, Germany
| | - Jeong Beom Kim
- Hans Schöler Stem Cell Research Center (HSSCRC), School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), 44919 Ulsan, South Korea
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43
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Xu K, Narayanan K, Lee F, Bae KH, Gao S, Kurisawa M. Enzyme-mediated hyaluronic acid-tyramine hydrogels for the propagation of human embryonic stem cells in 3D. Acta Biomater 2015; 24:159-71. [PMID: 26112373 DOI: 10.1016/j.actbio.2015.06.026] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 06/18/2015] [Accepted: 06/18/2015] [Indexed: 01/20/2023]
Abstract
The propagation of human embryonic stem cells (hESCs) in three-dimensional (3D) scaffolds facilitates the cell expansion process and supplies pluripotent cells of high quality for broad-spectrum applications in regenerative medicine. Herein, we report an enzyme-mediated hyaluronic acid-tyramine (HA-Tyr) hydrogel that encapsulated and propagated hESCs in 3D. HA-Tyr hydrogels were formed by crosslinking the tyramine moieties with horseradish peroxidase (HRP) and hydrogen peroxide (H2O2). By changing the HRP and H2O2 concentration, we prepared HA-Tyr hydrogels of different mechanical strength and studied the self-renewal properties of hESCs in these scaffolds. We observed that both the chemical composition and mechanical strength of substrates were important factors affecting cell proliferation and pluripotency. The HA-Tyr hydrogel with a compressive modulus of ∼350Pa supported the proliferation of hESCs at the pluripotent state in both mTeSR1 medium and mouse embryonic fibroblast (MEF)-conditioned medium. Immunohistochemical analyses revealed that hESCs proliferated well and formed spheroid structures in 3D, without undergoing apoptosis. The hESCs cultured in HA-Tyr hydrogels showed high expression of CD44 and pluripotency markers. These cells exhibited the capability to form cell derivatives of all three embryonic germ layers in vitro and in vivo. In addition, the genetic integrity of the hESCs was unaffected in the 3D cultivation system. STATEMENT OF SIGNIFICANCE The scope of this study is to provide a stable 3D cultivation system for the expansion of human embryonic stem cells (hESCs) towards clinical applications. We report an enzyme mediated hyaluronic acid-tyramine (HA-Tyr) hydrogel that encapsulated and propagated hESCs in 3D. Unlike other HA-based photo-crosslinked hydrogel systems reported, we investigated the effects of mechanical strength of hydrogels on the self-renewal properties of hESCs in 3D. Then, we characterized hESCs cultured in hydrogels with lower mechanical strength that best supported the self-renewal of hESCs. Hence, we demonstrated a reliable approach for the controlled propagation of hESCs in 3D. We believe that such an approach would facilitate the development of stem cell-based therapy towards clinical applications.
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Affiliation(s)
- Keming Xu
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
| | - Karthikeyan Narayanan
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
| | - Fan Lee
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
| | - Ki Hyun Bae
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
| | - Shujun Gao
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
| | - Motoichi Kurisawa
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore.
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44
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Bachman H, Nicosia J, Dysart M, Barker TH. Utilizing Fibronectin Integrin-Binding Specificity to Control Cellular Responses. Adv Wound Care (New Rochelle) 2015; 4:501-511. [PMID: 26244106 DOI: 10.1089/wound.2014.0621] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Accepted: 03/12/2015] [Indexed: 01/11/2023] Open
Abstract
Significance: Cells communicate with the extracellular matrix (ECM) protein fibronectin (Fn) through integrin receptors on the cell surface. Controlling integrin-Fn interactions offers a promising approach to directing cell behavior, such as adhesion, migration, and differentiation, as well as coordinated tissue behaviors such as morphogenesis and wound healing. Recent Advances: Several different groups have developed recombinant fragments of Fn that can control epithelial to mesenchymal transition, sequester growth factors, and promote bone and wound healing. It is thought that these physiological responses are, in part, due to specific integrin engagement. Furthermore, it has been postulated that the integrin-binding domain of Fn is a mechanically sensitive switch that drives binding of one integrin heterodimer over another. Critical Issues: Although computational simulations have predicted the mechano-switch hypothesis and recent evidence supports the existence of varying strain states of Fn in vivo, experimental evidence of the Fn integrin switch is still lacking. Future Directions: Evidence of the integrin mechano-switch will enable the development of new Fn-based peptides in tissue engineering and wound healing, as well as deepen our understanding of ECM pathologies, such as fibrosis.
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Affiliation(s)
- Haylee Bachman
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia
| | - John Nicosia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia
| | - Marilyn Dysart
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia
| | - Thomas H. Barker
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia
- The Petit Institute of Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, Georgia
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45
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Cattavarayane S, Palovuori R, Tanjore Ramanathan J, Manninen A. α6β1- and αV-integrins are required for long-term self-renewal of murine embryonic stem cells in the absence of LIF. BMC Cell Biol 2015; 16:3. [PMID: 25886986 PMCID: PMC4348401 DOI: 10.1186/s12860-015-0051-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Accepted: 02/03/2015] [Indexed: 11/30/2022] Open
Abstract
Background The growth properties and self-renewal capacity of embryonic stem (ES) cells are regulated by their immediate microenvironment such as the extracellular matrix (ECM). Integrins, a central family of cellular ECM receptors, have been implicated in these processes but their specific role in ES cell self-renewal remains unclear. Results Here we have studied the effects of different ECM substrates and integrins in mouse ES cells in the absence of Leukemia Inhibitory Factor (LIF) using short-term assays as well as long-term cultures. Removal of LIF from ES cell culture medium induced morphological differentiation of ES cells into polarized epistem cell-like cells. These cells maintained epithelial morphology and expression of key stemness markers for at least 10 passages in the absence of LIF when cultured on laminin, fibronectin or collagen IV substrates. The specific functional roles of α6-, αV- and β1-integrin subunits were dissected using stable lentivirus-mediated RNAi methodology. β1-integrins were required for ES cell survival in long-term cultures and for the maintenance of stem cell marker expression. Inhibition of α6-integrin expression compromised self-renewal on collagen while αV-integrins were required for robust ES cell adhesion on laminin. Analysis of the stemness marker expression revealed subtle differences between α6- and αV-depleted ES cells but the expression of both was required for optimal self-renewal in long-term ES cell cultures. Conclusions In the absence of LIF, long-term ES cell cultures adapt an epistem cell-like epithelial phenotype and retain the expression of multiple stem cell markers. Long-term maintenance of such self-renewing cultures depends on the expression of β1-, α6- and αV-integrins. Electronic supplementary material The online version of this article (doi:10.1186/s12860-015-0051-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sandhanakrishnan Cattavarayane
- Biocenter Oulu, Oulu Center for Cell-Matrix Research, Faculty of Biochemistry and Molecular Medicine, University of Oulu, Aapistie 5, Oulu, 90220, Finland.
| | - Riitta Palovuori
- Biocenter Oulu, Oulu Center for Cell-Matrix Research, Faculty of Biochemistry and Molecular Medicine, University of Oulu, Aapistie 5, Oulu, 90220, Finland.
| | - Jayendrakishore Tanjore Ramanathan
- Biocenter Oulu, Oulu Center for Cell-Matrix Research, Faculty of Biochemistry and Molecular Medicine, University of Oulu, Aapistie 5, Oulu, 90220, Finland. .,Current address: Université de Lorraine, CS 25233, Nancy, cedex, 54052, France.
| | - Aki Manninen
- Biocenter Oulu, Oulu Center for Cell-Matrix Research, Faculty of Biochemistry and Molecular Medicine, University of Oulu, Aapistie 5, Oulu, 90220, Finland.
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46
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Desai N, Rambhia P, Gishto A. Human embryonic stem cell cultivation: historical perspective and evolution of xeno-free culture systems. Reprod Biol Endocrinol 2015; 13:9. [PMID: 25890180 PMCID: PMC4351689 DOI: 10.1186/s12958-015-0005-4] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 02/09/2015] [Indexed: 01/23/2023] Open
Abstract
Human embryonic stem cells (hESC) have emerged as attractive candidates for cell-based therapies that are capable of restoring lost cell and tissue function. These unique cells are able to self-renew indefinitely and have the capacity to differentiate in to all three germ layers (ectoderm, endoderm and mesoderm). Harnessing the power of these pluripotent stem cells could potentially offer new therapeutic treatment options for a variety of medical conditions. Since the initial derivation of hESC lines in 1998, tremendous headway has been made in better understanding stem cell biology and culture requirements for maintenance of pluripotency. The approval of the first clinical trials of hESC cells for treatment of spinal cord injury and macular degeneration in 2010 marked the beginning of a new era in regenerative medicine. Yet it was clearly recognized that the clinical utility of hESC transplantation was still limited by several challenges. One of the most immediate issues has been the exposure of stem cells to animal pathogens, during hESC derivation and during in vitro propagation. Initial culture protocols used co-culture with inactivated mouse fibroblast feeder (MEF) or human feeder layers with fetal bovine serum or alternatively serum replacement proteins to support stem cell proliferation. Most hESC lines currently in use have been exposed to animal products, thus carrying the risk of xeno-transmitted infections and immune reaction. This mini review provides a historic perspective on human embryonic stem cell culture and the evolution of new culture models. We highlight the challenges and advances being made towards the development of xeno-free culture systems suitable for therapeutic applications.
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Affiliation(s)
- Nina Desai
- Department of Obstetrics and Gynecology, Cleveland Clinic, Beachwood, OH, USA.
| | - Pooja Rambhia
- Department of Obstetrics and Gynecology, Cleveland Clinic, Beachwood, OH, USA.
| | - Arsela Gishto
- Department of Obstetrics and Gynecology, Cleveland Clinic, Beachwood, OH, USA.
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47
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Tharp KM, Stahl A. Bioengineering Beige Adipose Tissue Therapeutics. Front Endocrinol (Lausanne) 2015; 6:164. [PMID: 26539163 PMCID: PMC4611961 DOI: 10.3389/fendo.2015.00164] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 10/05/2015] [Indexed: 02/06/2023] Open
Abstract
Unlocking the therapeutic potential of brown/beige adipose tissue requires technological advancements that enable the controlled expansion of this uniquely thermogenic tissue. Transplantation of brown fat in small animal model systems has confirmed the expectation that brown fat expansion could possibly provide a novel therapeutic to combat obesity and related disorders. Expansion and/or stimulation of uncoupling protein-1 (UCP1)-positive adipose tissues have repeatedly demonstrated physiologically beneficial reductions in circulating glucose and lipids. The recent discovery that brown adipose tissue (BAT)-derived secreted factors positively alter whole body metabolism further expands potential benefits of brown or beige/brite adipose expansion. Unfortunately, there are no sources of transplantable BATs for human therapeutic purposes at this time. Recent developments in bioengineering, including novel hyaluronic acid-based hydrogels, have enabled non-immunogenic, functional tissue allografts that can be used to generate large quantities of UCP1-positive adipose tissue. These sophisticated tissue-engineering systems have provided the methodology to develop metabolically active brown or beige/brite adipose tissue implants with the potential to be used as a metabolic therapy. Unlike the pharmacological browning of white adipose depots, implantation of bioengineered UCP1-positive adipose tissues offers a spatially controlled therapeutic. Moving forward, new insights into the mechanisms by which extracellular cues govern stem-cell differentiation and progenitor cell recruitment may enable cell-free matrix implant approaches, which generate a niche sufficient to recruit white adipose tissue-derived stem cells and support their differentiation into functional beige/brite adipose tissues. This review summarizes clinically relevant discoveries in tissue-engineering and biology leading toward the recent development of biomaterial supported beige adipose tissue implants and their potential for the metabolic therapies.
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Affiliation(s)
- Kevin M. Tharp
- Program in Metabolic Biology, Department of Nutritional Science and Toxicology, University of California Berkeley, Berkeley, CA, USA
- Department of Bioengineering, University of California Berkeley, Berkeley, CA, USA
| | - Andreas Stahl
- Program in Metabolic Biology, Department of Nutritional Science and Toxicology, University of California Berkeley, Berkeley, CA, USA
- *Correspondence: Andreas Stahl,
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48
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Bal T, Nazli C, Okcu A, Duruksu G, Karaöz E, Kizilel S. Mesenchymal stem cells and ligand incorporation in biomimetic poly(ethylene glycol) hydrogels significantly improve insulin secretion from pancreatic islets. J Tissue Eng Regen Med 2014; 11:694-703. [PMID: 25393526 DOI: 10.1002/term.1965] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Revised: 07/07/2014] [Accepted: 09/25/2014] [Indexed: 12/20/2022]
Abstract
The main goal of this study was to investigate pancreatic islet function with mesenchymal stem cells (MSCs) in a ligand-functionalized poly(ethylene glycol) (PEG) hydrogel for the treatment of type 1 diabetes (T1D). Rat bone marrow-derived MSCs (rBM-MSCs) were encapsulated within synthetic PEG hydrogel, and cell viability and apoptosis within this 3D environment was examined in detail. ATP content and caspase-3 activity of encapsulated MSCs showed that fibronectin-derived RGDS, laminin-derived IKVAV and/or insulinotropic glucagon-like peptide (GLP-1) were required to maintain MSC survival. Incorporation of these peptides into the hydrogel environment also improved pancreatic islet viability, where combinations of peptides had altered effects on islet survival. GLP-1 alone was the leading stimulator for insulin secretion. Cell adhesion peptides RGDS and IKVAV improved insulin secretion only when they were used in combination, but could not surpass the effect of GLP-1. Further, when pancreatic islets were co-encapsulated with MSCs within synthetic PEG hydrogel, a two-fold increase in the stimulation index was measured. Synergistic effects of MSCs and peptides were observed, with a seven-fold increase in the stimulation index. The results are promising and suggest that simultaneous incorporation of MSCs and ECM-derived peptides and/or GLP-1 can improve pancreatic islet function in response to altered glucose levels in the physiological environment. Copyright © 2014 John Wiley & Sons, Ltd.
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Affiliation(s)
- Tuğba Bal
- Chemical and Biological Engineering, Koc University, Istanbul, Turkey
| | - Caner Nazli
- Material Sciences and Engineering, Koc University, Istanbul, Turkey
| | - Alparslan Okcu
- Center for Stem Cell and Gene Therapies Research and Practice, Kocaeli University, Kocaeli, Turkey
| | - Gökhan Duruksu
- Center for Stem Cell and Gene Therapies Research and Practice, Kocaeli University, Kocaeli, Turkey
| | - Erdal Karaöz
- Center for Stem Cell and Gene Therapies Research and Practice, Kocaeli University, Kocaeli, Turkey.,Liv Hospital, Regenerative Medicine, Stem Cell Research and Therapy Center, Istanbul, Turkey
| | - Seda Kizilel
- Chemical and Biological Engineering, Koc University, Istanbul, Turkey.,Material Sciences and Engineering, Koc University, Istanbul, Turkey
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49
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Lowe SB, Tan VTG, Soeriyadi AH, Davis TP, Gooding JJ. Synthesis and High-Throughput Processing of Polymeric Hydrogels for 3D Cell Culture. Bioconjug Chem 2014; 25:1581-601. [DOI: 10.1021/bc500310v] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
| | | | | | - Thomas P. Davis
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Parkville, VIC 3052, Australia
- Department
of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
- Monash Institute
of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - J. Justin Gooding
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Parkville, VIC 3052, Australia
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50
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Abstract
An important hallmark of many adult stem cell niches is their proximity to the vasculature in vivo, a feature common to neural stem cells (NSCs), mesenchymal stem cells (MSCs) from bone marrow, adipose, and other tissues, hematopoietic stem cells (HSCs), and many tumor stem cells. This review summarizes key studies supporting the vasculature's instructive role in adult stem cell niches, and the putative underlying molecular mechanisms by which blood vessels in these niches exert control over progenitor cell fates. The importance of the perivascular niche for pathology, notably tumor metastasis and dormancy, is also highlighted. Finally, the implications of the perivascular regulation of stem and progenitor cells on biomaterial design and the impact on future research directions are discussed.
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Affiliation(s)
- Andrew J Putnam
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109
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