1101
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Yeom J, Hwang BW, Yang DJ, Shin HI, Hahn SK. Effect of osteoconductive hyaluronate hydrogels on calvarial bone regeneration. Biomater Res 2014; 18:8. [PMID: 26331059 PMCID: PMC4549130 DOI: 10.1186/2055-7124-18-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Accepted: 07/09/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Without exploitation of possibly immunogenic and carcinogenic bone morphogenetic protein, we developed simple but clinically feasible artificial bone graft using osteoconductive hyaluronate (HA) hydrogels and bioactive MegaGen synthetic bone (MGSB). METHODS HA hydrogels were synthesized by the crosslinking reaction between carboxyl groups of HA and amine groups of gelatin (GEL). Then, artificial bone grafts were prepared by mixing MGSB with HA-GEL hydrogels. The bone regeneration by the MGSB/HA-GEL hydrogel complex was assessed in the skull of New Zealand white male rabbits in 4 and 8 weeks. RESULTS HA hydrogels were synthesized by the crosslinking reaction between carboxyl groups of HA and amine groups of gelatin (GEL). Then, artificial bone grafts were prepared by mixing MGSB with HA-GEL hydrogels. In vitro proliferation of preosteogenic cells was enhanced with increasing molecular weight of HA. In addition, histological analysis of dissected tissues with hematoxylin and eosin staining confirmed the effective in vivo bone regeneration by the MGSB/HA-GEL hydrogel complex. The MGSB/HA-GEL hydrogels were well resorbed and partially substituted to the lamellar bone after implantation for 8 weeks. CONCLUSIONS The novel artificial bone graft of MGSB/HA-GEL hydrogel complex for effective bone regeneration might be clinically feasible for further development.
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Affiliation(s)
- Junseok Yeom
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-dong, Nam-gu, Pohang, Kyungbuk 790-784 Korea
| | - Byung Woo Hwang
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-dong, Nam-gu, Pohang, Kyungbuk 790-784 Korea
| | - Dong Jun Yang
- MegaGen Research Institute of Science and Technology, 377-2 Gyochon-ri, Jain-myeon, Kyeongsan, Kyungbuk 712-852 Korea
| | - Hong-In Shin
- Department of Oral Pathology, School of Dentistry, IHBR, Kyungpook National University, 188-1, Samdeok-dong, Jung-gu, Daegu, Kyungbuk 700-412 Korea
| | - Sei Kwang Hahn
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-dong, Nam-gu, Pohang, Kyungbuk 790-784 Korea
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1102
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Pillai JJ, Thulasidasan AKT, Anto RJ, Chithralekha DN, Narayanan A, Kumar GSV. Folic acid conjugated cross-linked acrylic polymer (FA-CLAP) hydrogel for site specific delivery of hydrophobic drugs to cancer cells. J Nanobiotechnology 2014; 12:25. [PMID: 25026938 PMCID: PMC4107481 DOI: 10.1186/1477-3155-12-25] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Accepted: 07/04/2014] [Indexed: 12/27/2022] Open
Abstract
Background The hydrogel based system is found to be rarely reported for the delivery of hydrophobic drug due to the incompatibility of hydrophilicity of the polymer network and the hydrophobicity of drug. This problem can be solved by preparing semi-interpenetrating network of cross-linked polymer for tuning the hydrophilicity so as to entrap the hydrophobic drugs. The current study is to develop a folic acid conjugated cross-linked pH sensitive, biocompatible polymeric hydrogel to achieve a site specific drug delivery. For that, we have synthesized a folic acid conjugated PEG cross-linked acrylic polymer (FA-CLAP) hydrogel and investigated its loading and release of curcumin. The formed polymer hydrogel was then conjugated with folic acid for the site specific delivery of curcumin to cancer cells and then further characterized and conducted the cell uptake and cytotoxicity studies on human cervical cancer cell lines (HeLa). Results In this study, we synthesized folic acid conjugated cross-linked acrylic hydrogel for the delivery of hydrophobic drugs to the cancer site. Poly (ethyleneglycol) (PEG) diacrylate cross-linked acrylic polymer (PAA) was prepared via inverse emulsion polymerization technique and later conjugated it with folic acid (FA-CLAP). Hydrophobic drug curcumin is entrapped into it and investigated the entrapment efficiency. Characterization of synthesized hydogel was done by using Fourier Transform-Infrared spectroscopy (FT-IR), Transmission Electron Microscopy (TEM), Differential Scanning Calorimetry (DSC). Polymerization and folate conjugation was confirmed by FT-IR spectroscopy. The release kinetics of drug from the entrapped form was studied which showed initial burst release followed by sustained release due to swelling and increased cross-linking. In vitro cytotoxicity and cell uptake studies were conducted in human cervical cancer (HeLa) cell lines. Conclusions Results showed that curcumin entrapped folate conjugated cross-linked acrylic polymer (FA-CLAP) hydrogel showed higher cellular uptake than the non folate conjugated form. So this can be suggested as a better delivery system for site specific release of hydrophobic cancer drugs.
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1103
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Hill RJ, Wang CY. Diffusion in phospholipid bilayer membranes: dual-leaflet dynamics and the roles of tracer-leaflet and inter-leaflet coupling. Proc Math Phys Eng Sci 2014; 470:20130843. [PMID: 25002822 DOI: 10.1098/rspa.2013.0843] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 04/09/2014] [Indexed: 11/12/2022] Open
Abstract
A variety of observations-sometimes controversial-have been made in recent decades when attempting to elucidate the roles of interfacial slip on tracer diffusion in phospholipid membranes. Evans-Sackmann theory (1988) has furnished membrane viscosities and lubrication-film thicknesses for supported membranes from experimentally measured lateral diffusion coefficients. Similar to the Saffman and Delbrück model, which is the well-known counterpart for freely supported membranes, the bilayer is modelled as a single two-dimensional fluid. However, the Evans-Sackman model cannot interpret the mobilities of monotopic tracers, such as individual lipids or rigidly bound lipid assemblies; neither does it account for tracer-leaflet and inter-leaflet slip. To address these limitations, we solve the model of Wang and Hill, in which two leaflets of a bilayer membrane, a circular tracer and supports are coupled by interfacial friction, using phenomenological friction/slip coefficients. This furnishes an exact solution that can be readily adopted to interpret the mobilities of a variety of mosaic elements-including lipids, integral monotopic and polytopic proteins, and lipid rafts-in supported bilayer membranes.
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Affiliation(s)
- Reghan J Hill
- Department of Chemical Engineering , McGill University , Montreal, Quebec, H3A 0C5, Canada
| | - Chih-Ying Wang
- Department of Chemical Engineering , McGill University , Montreal, Quebec, H3A 0C5, Canada
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1104
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Eker B, Temiz Y, Delamarche E. Heterogeneous integration of gels into microfluidics using a mesh carrier. Biomed Microdevices 2014; 16:829-35. [DOI: 10.1007/s10544-014-9886-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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1105
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Tomakidi P, Schulz S, Proksch S, Weber W, Steinberg T. Focal adhesion kinase (FAK) perspectives in mechanobiology: implications for cell behaviour. Cell Tissue Res 2014; 357:515-26. [PMID: 24988914 DOI: 10.1007/s00441-014-1945-2] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 06/04/2014] [Indexed: 11/24/2022]
Abstract
Mechanobiology is a scientific interface discipline emerging from engineering and biology. With regard to tissue-regenerative cell-based strategies, mechanobiological concepts, including biomechanics as a target for cell and human mesenchymal stem cell behaviour, are on the march. Based on the periodontium as a paradigm, this mini-review discusses the key role of focal-adhesion kinase (FAK) in mechanobiology, since it is involved in mediating the transformation of environmental biomechanical signals into cell behavioural responses via mechanotransducing signalling cascades. These processes enable cells to adjust quickly to environmental cues, whereas adjustment itself relies on the specific intramolecular phosphorylation of FAK tyrosine residues and the multiple interactions of FAK with distinct partners. Furthermore, interaction-triggered mechanotransducing pathways govern the dynamics of focal adhesion sites and cell behaviour. Facets of behaviour not only include cell spreading and motility, but also proliferation, differentiation and apoptosis. In translational terms, identified and characterized biomechanical parameters can be incorporated into innovative concepts of cell- and tissue-tailored clinically applied biomaterials controlling cell behaviour as desired.
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Affiliation(s)
- Pascal Tomakidi
- Department of Oral Biotechnology, University Hospital Freiburg, Hugstetter Strasse 55, 79106, Freiburg, Germany,
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1106
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Huang CC, Ravindran S, Yin Z, George A. 3-D self-assembling leucine zipper hydrogel with tunable properties for tissue engineering. Biomaterials 2014; 35:5316-5326. [PMID: 24713184 PMCID: PMC4020426 DOI: 10.1016/j.biomaterials.2014.03.035] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Accepted: 03/14/2014] [Indexed: 12/12/2022]
Abstract
Peptide-based engineered hydrogel scaffolds present several advantages over traditional protein or polymeric hydrogels by imparting more robust control over hydrogel properties. In this manuscript, we report the synthesis and characterization of a leucine zipper (LZ) based self-assembling hydrogel for use in tissue engineering applications. Although, LZ hydrogels posses several advantages, the stability of these hydrogels has always been elusive. In this study, we have standardized the procedure for creating a stable LZ hydrogel. Pore-size was tunable by altering the peptide concentration from 7% to 12% by weight. In order to create a microenvironment for cell adhesion, the LZ polypeptide was functionalized by the incorporation of the cell attachment RGD domain. In vivo implantation of the LZ scaffolds in a mouse model showed absence of foreign body reaction to the scaffold. In vivo experiments with human marrow stem cells (HMSCs) in immunocompromised mice showed the biological property of the hydrogel to promote cell attachment, proliferation and its ability to support neovascularization. Our results show for the first time, that it is possible to generate a functional and stable LZ scaffold that can be used in vivo for tissue engineering applications.
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Affiliation(s)
- Chun-Chieh Huang
- Brodie Tooth Development Genetics & Regenerative Medicine Research Laboratory, USA; Department of Bioengineering, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Sriram Ravindran
- Brodie Tooth Development Genetics & Regenerative Medicine Research Laboratory, USA; Department of Oral Biology, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Ziying Yin
- Department of Bioengineering, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Anne George
- Brodie Tooth Development Genetics & Regenerative Medicine Research Laboratory, USA; Department of Oral Biology, University of Illinois at Chicago, Chicago, IL 60612, USA.
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1107
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Wang Y, Zhao Q, Zhang H, Yang S, Jia X. A novel poly(amido amine)-dendrimer-based hydrogel as a mimic for the extracellular matrix. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:4163-4167. [PMID: 24729192 DOI: 10.1002/adma.201400323] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 02/26/2014] [Indexed: 06/03/2023]
Abstract
The extracellular matrix is mimicked by a novel dendrimer-based hydrogel, which exhibits a highly interconnected porous network, enhanced mechanical stiffness, and a low swelling ratio. The hydrogel system supports the proliferation and differentiation of mesenchymal stem cells without any cytotoxic effects. This dendrimer-based hydrogel may serve as a model for developing new advanced materials with applications in tissue engineering.
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Affiliation(s)
- Yao Wang
- Beijing National Laboratory for Molecular Sciences and the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
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1108
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Mickleburgh I, Kafasla P, Cherny D, Llorian M, Curry S, Jackson RJ, Smith CWJ. The organization of RNA contacts by PTB for regulation of FAS splicing. Nucleic Acids Res 2014; 42:8605-20. [PMID: 24957602 PMCID: PMC4117754 DOI: 10.1093/nar/gku519] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Post-transcriptional steps of gene expression are regulated by RNA binding proteins. Major progress has been made in characterizing RNA-protein interactions, from high resolution structures to transcriptome-wide profiling. Due to the inherent technical challenges, less attention has been paid to the way in which proteins with multiple RNA binding domains engage with target RNAs. We have investigated how the four RNA recognition motif (RRM) domains of Polypyrimidine tract binding (PTB) protein, a major splicing regulator, interact with FAS pre-mRNA under conditions in which PTB represses FAS exon 6 splicing. A combination of tethered hydroxyl radical probing, targeted inactivation of individual RRMs and single molecule analyses revealed an unequal division of labour between the four RRMs of PTB. RNA binding by RRM4 is the most important for function despite the low intrinsic binding specificity and the complete lack of effect of disrupting individual RRM4 contact points on the RNA. The ordered RRM3-4 di-domain packing provides an extended binding surface for RNA interacting at RRM4, via basic residues in the preceding linker. Our results illustrate how multiple alternative low-specificity binding configurations of RRM4 are consistent with repressor function as long as the overall ribonucleoprotein architecture provided by appropriate di-domain packing is maintained.
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Affiliation(s)
- Ian Mickleburgh
- Department of Biochemistry, University of Cambridge, Downing Site, Tennis Court Road, Cambridge, CB2 1QW, UK
| | - Panagiota Kafasla
- Department of Biochemistry, University of Cambridge, Downing Site, Tennis Court Road, Cambridge, CB2 1QW, UK
| | - Dmitry Cherny
- Department of Biochemistry, Henry Wellcome Building, University of Leicester, Lancaster Road, Leicester LE1 9HN, UK
| | - Miriam Llorian
- Department of Biochemistry, University of Cambridge, Downing Site, Tennis Court Road, Cambridge, CB2 1QW, UK
| | - Stephen Curry
- Division of Cell and Molecular Biology, Imperial College, Exhibition Road, London SW7 2AZ, UK
| | - Richard J Jackson
- Department of Biochemistry, University of Cambridge, Downing Site, Tennis Court Road, Cambridge, CB2 1QW, UK
| | - Christopher W J Smith
- Department of Biochemistry, University of Cambridge, Downing Site, Tennis Court Road, Cambridge, CB2 1QW, UK
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1109
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Desmosine-inspired cross-linkers for hyaluronan hydrogels. Sci Rep 2014; 3:2043. [PMID: 23784477 PMCID: PMC3687245 DOI: 10.1038/srep02043] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 05/31/2013] [Indexed: 01/20/2023] Open
Abstract
We designed bioinspired cross-linkers based on desmosine, the cross-linker in natural elastin, to prepare hydrogels with thiolated hyaluronic acid. These short, rigid cross-linkers are based on pyridinium salts (as in desmosine) and can connect two polymer backbones. Generally, the obtained semi-synthetic hydrogels are form-stable, can withstand repeated stress, have a large linear-elastic range, and show strain stiffening behavior typical for biopolymer networks. In addition, it is possible to introduce a positive charge to the core of the cross-linker without affecting the gelation efficiency, or consequently the network connectivity. However, the mechanical properties strongly depend on the charge of the cross-linker. The properties of the presented hydrogels can thus be tuned in a range important for engineering of soft tissues by controlling the cross-linking density and the charge of the cross-linker.
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1110
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Lambrechts D, Roeffaers M, Kerckhofs G, Hofkens J, Van de Putte T, Schrooten J, Van Oosterwyck H. Reporter cell activity within hydrogel constructs quantified from oxygen-independent bioluminescence. Biomaterials 2014; 35:8065-77. [PMID: 24957291 DOI: 10.1016/j.biomaterials.2014.06.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 06/01/2014] [Indexed: 12/12/2022]
Abstract
By providing a three-dimensional (3D) support to cells, hydrogels offer a more relevant in vivo tissue-like environment as compared to two-dimensional cell cultures. Hydrogels can be applied as screening platforms to investigate in 3D the role of biochemical and biophysical cues on cell behaviour using bioluminescent reporter cells. Gradients in oxygen concentration that result from the interplay between molecular transport and cell metabolism can however cause substantial variability in the observed bioluminescent reporter cell activity. To assess the influence of these oxygen gradients on the emitted bioluminescence for various hydrogel geometries, a combined experimental and modelling approach was implemented. We show that the applied model is able to predict oxygen gradient independent bioluminescent intensities which correlate better to the experimentally determined viable cell numbers, as compared to the experimentally measured bioluminescent intensities. By analysis of the bioluminescence reaction dynamics we obtained a quantitative description of cellular oxygen metabolism within the hydrogel, which was validated by direct measurements of oxygen concentration within the hydrogel. Bioluminescence peak intensities can therefore be used as a quantitative measurement of reporter cell activity within a hydrogel, but an unambiguous interpretation of these intensities requires a compensation for the influence of cell-induced oxygen gradients on the luciferase activity.
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Affiliation(s)
- Dennis Lambrechts
- Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44 - Box 2450, 3001 Leuven, Belgium; Prometheus, Division of Skeletal Tissue Engineering Leuven, KU Leuven, Herestraat 49 - Box 813, 3000 Leuven, Belgium
| | - Maarten Roeffaers
- Center for Surface Chemistry and Catalysis, KU Leuven, Kasteelpark Arenberg 23, 3001 Leuven, Belgium
| | - Greet Kerckhofs
- Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44 - Box 2450, 3001 Leuven, Belgium; Prometheus, Division of Skeletal Tissue Engineering Leuven, KU Leuven, Herestraat 49 - Box 813, 3000 Leuven, Belgium
| | - Johan Hofkens
- Molecular Imaging and Photonics, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Tom Van de Putte
- TiGenix NV, Haasrode Researchpark 1724, Romeinse Straat 12 box 2, 3001 Leuven, Belgium
| | - Jan Schrooten
- Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44 - Box 2450, 3001 Leuven, Belgium; Prometheus, Division of Skeletal Tissue Engineering Leuven, KU Leuven, Herestraat 49 - Box 813, 3000 Leuven, Belgium.
| | - Hans Van Oosterwyck
- Prometheus, Division of Skeletal Tissue Engineering Leuven, KU Leuven, Herestraat 49 - Box 813, 3000 Leuven, Belgium; Biomechanics Section, KU Leuven, Celestijnenlaan 300C - Box 2419, 3001 Leuven, Belgium.
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1111
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Liu Z, Lin Q, Sun Y, Liu T, Bao C, Li F, Zhu L. Spatiotemporally controllable and cytocompatible approach builds 3D cell culture matrix by photo-uncaged-thiol Michael addition reaction. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:3912-7. [PMID: 24652710 DOI: 10.1002/adma.201306061] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 02/12/2014] [Indexed: 05/25/2023]
Affiliation(s)
- Zhenzhen Liu
- Key Laboratory for Advanced Materials, Institute of Fine Chemicals, East China University of Science and Technology, 130# Meilong Road, Shanghai, 200237, China
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1112
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Chan KWY, Liu G, van Zijl PCM, Bulte JWM, McMahon MT. Magnetization transfer contrast MRI for non-invasive assessment of innate and adaptive immune responses against alginate-encapsulated cells. Biomaterials 2014; 35:7811-8. [PMID: 24930848 DOI: 10.1016/j.biomaterials.2014.05.057] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 05/21/2014] [Indexed: 12/24/2022]
Abstract
By means of physical isolation of cells inside semi-permeable hydrogels, encapsulation has been widely used to immunoprotect transplanted cells. While spherical alginate microcapsules are now being used clinically, there still is little known about the patient's immune system response unless biopsies are obtained. We investigated the use of Magnetization Transfer (MT) imaging to non-invasively detect host immune responses against alginate capsules containing xenografted human hepatocytes in four groups of animals, including transplanted empty capsules (-Cells/-IS), capsules with live cells with (+LiveCells/+IS) and without immunosuppression (+LiveCells/-IS), and capsules with apoptotic cells in non-immunosuppressed animals (+DeadCells/-IS). The highest MT ratio (MTR) was found in +LiveCells/-IS, which increased from day 0 by 38% and 53% on days 7 and 14 after transplantation respectively, and corresponded to a distinctive increase in cell infiltration on histology. Furthermore, we show that macromolecular ratio maps based on MT data are more sensitive to cell infiltration and fibrosis than conventional MTR maps. Such maps showed a significant difference between +LiveCells/-IS (0.18 ± 0.02) and +DeadCells/-IS (0.13 ± 0.02) on day 7 (P < 0.01) existed, which was not observed on MTR imaging. We conclude that MT imaging, which is clinically available, can be applied for non-invasive monitoring of the occurrence of a host immune response against encapsulated cells.
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Affiliation(s)
- Kannie W Y Chan
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD 21205, USA; Center of Nanomedicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Cellular Imaging Section and Vascular Biology Program, Institute for Cell Engineering, Baltimore, MD 21205, USA
| | - Guanshu Liu
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD 21205, USA
| | - Peter C M van Zijl
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD 21205, USA
| | - Jeff W M Bulte
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD 21205, USA; Cellular Imaging Section and Vascular Biology Program, Institute for Cell Engineering, Baltimore, MD 21205, USA
| | - Michael T McMahon
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD 21205, USA; Center of Nanomedicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
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1113
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Helminger M, Wu B, Kollmann T, Benke D, Schwahn D, Pipich V, Faivre D, Zahn D, Cölfen H. Synthesis and Characterization of Gelatin-Based Magnetic Hydrogels. ADVANCED FUNCTIONAL MATERIALS 2014; 24:3187-3196. [PMID: 25844086 PMCID: PMC4379906 DOI: 10.1002/adfm.201303547] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Indexed: 05/27/2023]
Abstract
A simple preparation of thermoreversible gelatin-based ferrogels in water provides a constant structure defined by the crosslinking degree for gelatin contents between 6 and 18 wt%. The possibility of varying magnetite nanoparticle concentration between 20 and 70 wt% is also reported. Simulation studies hint at the suitability of collagen to bind iron and hydroxide ions, suggesting that collagen acts as a nucleation seed to iron hydroxide aggregation, and thus the intergrowth of collagen and magnetite nanoparticles already at the precursor stage. The detailed structure of the individual ferrogel components is characterized by small-angle neutron scattering (SANS) using contrast matching. The magnetite structure characterization is supplemented by small-angle X-ray scattering and microscopy only visualizing magnetite. SANS shows an unchanged gelatin structure of average mesh size larger than the nanoparticles with respect to gel concentration while the magnetite nanoparticles size of around 10 nm seems to be limited by the gel mesh size. Swelling measurements underline that magnetite acts as additional crosslinker and therefore varying the magnetic and mechanical properties of the ferrogels. Overall, the simple and variable synthesis protocol, the cheap and easy accessibility of the components as well as the biocompatibility of the gelatin-based materials suggest them for a number of applications including actuators.
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Affiliation(s)
- Maria Helminger
- Physical Chemistry, University of KonstanzUniversitätsstrasse 10, D-78457, Konstanz, Germany
| | - Baohu Wu
- Physical Chemistry, University of KonstanzUniversitätsstrasse 10, D-78457, Konstanz, Germany
- Jülich Centre for Neutron Science JCNS-MLZ, Outstation at MLZLichtenbergstrasse 1, D-85747, Garching, Germany
| | - Tina Kollmann
- Theoretical Chemistry, University of Erlangen-NürnbergNägelsbachstraße 25, D-91052, Erlangen, Germany
| | - Dominik Benke
- Physical Chemistry, University of KonstanzUniversitätsstrasse 10, D-78457, Konstanz, Germany
| | - Dietmar Schwahn
- Department of Physics, Technical University of MunichJames-Franck-Str. 1, D-85747, Garching, Germany
| | - Vitaliy Pipich
- Jülich Centre for Neutron Science JCNS-MLZ, Outstation at MLZLichtenbergstrasse 1, D-85747, Garching, Germany
| | - Damien Faivre
- Department of Biomaterials, Max Planck Institute of Colloids & InterfacesScience Park Golm, D-14424, Potsdam, Germany
| | - Dirk Zahn
- Theoretical Chemistry, University of Erlangen-NürnbergNägelsbachstraße 25, D-91052, Erlangen, Germany
| | - Helmut Cölfen
- Physical Chemistry, University of KonstanzUniversitätsstrasse 10, D-78457, Konstanz, Germany
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1114
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Boere KWM, Visser J, Seyednejad H, Rahimian S, Gawlitta D, van Steenbergen MJ, Dhert WJA, Hennink WE, Vermonden T, Malda J. Covalent attachment of a three-dimensionally printed thermoplast to a gelatin hydrogel for mechanically enhanced cartilage constructs. Acta Biomater 2014; 10:2602-11. [PMID: 24590160 DOI: 10.1016/j.actbio.2014.02.041] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Revised: 01/23/2014] [Accepted: 02/21/2014] [Indexed: 01/01/2023]
Abstract
Hydrogels can provide a suitable environment for tissue formation by embedded cells, which makes them suitable for applications in regenerative medicine. However, hydrogels possess only limited mechanical strength, and must therefore be reinforced for applications in load-bearing conditions. In most approaches the reinforcing component and the hydrogel network have poor interactions and the synergetic effect of both materials on the mechanical properties is not effective. Therefore, in the present study, a thermoplastic polymer blend of poly(hydroxymethylglycolide-co-ε-caprolactone)/poly(ε-caprolactone) (pHMGCL/PCL) was functionalized with methacrylate groups (pMHMGCL/PCL) and covalently grafted to gelatin methacrylamide (gelMA) hydrogel through photopolymerization. The grafting resulted in an at least fivefold increase in interface-binding strength between the hydrogel and the thermoplastic polymer material. GelMA constructs were reinforced with three-dimensionally printed pHMGCL/PCL and pMHMGCL/PCL scaffolds and tested in a model for a focal articular cartilage defect. In this model, covalent bonds at the interface of the two materials resulted in constructs with an improved resistance to repeated axial and rotational forces. Moreover, chondrocytes embedded within the constructs were able to form cartilage-specific matrix both in vitro and in vivo. Thus, by grafting the interface of different materials, stronger hybrid cartilage constructs can be engineered.
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Affiliation(s)
- Kristel W M Boere
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Faculty of Science, Utrecht University, PO Box 80082, 3508 TB Utrecht, The Netherlands
| | - Jetze Visser
- Department of Orthopaedics, University Medical Center Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands
| | - Hajar Seyednejad
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Faculty of Science, Utrecht University, PO Box 80082, 3508 TB Utrecht, The Netherlands
| | - Sima Rahimian
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Faculty of Science, Utrecht University, PO Box 80082, 3508 TB Utrecht, The Netherlands
| | - Debby Gawlitta
- Department of Orthopaedics, University Medical Center Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands
| | - Mies J van Steenbergen
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Faculty of Science, Utrecht University, PO Box 80082, 3508 TB Utrecht, The Netherlands
| | - Wouter J A Dhert
- Department of Orthopaedics, University Medical Center Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands; Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, PO Box 80163, 3508 TD Utrecht, The Netherlands
| | - Wim E Hennink
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Faculty of Science, Utrecht University, PO Box 80082, 3508 TB Utrecht, The Netherlands
| | - Tina Vermonden
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Faculty of Science, Utrecht University, PO Box 80082, 3508 TB Utrecht, The Netherlands
| | - Jos Malda
- Department of Orthopaedics, University Medical Center Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands; Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, PO Box 80163, 3508 TD Utrecht, The Netherlands.
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1115
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Huang H, Song W, Chen G, Reynard JM, Ohulchanskyy TY, Prasad PN, Bright FV, Lovell JF. Pd-porphyrin-cross-linked implantable hydrogels with oxygen-responsive phosphorescence. Adv Healthc Mater 2014; 3:891-6. [PMID: 24259519 PMCID: PMC4143977 DOI: 10.1002/adhm.201300483] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Revised: 08/31/2013] [Indexed: 12/20/2022]
Abstract
Development of long-term implantable luminescent biosensors for subcutaneous oxygen has proved challenging due to difficulties in immobilizing a biocompatible matrix that prevents sensor aggregation yet maintains sufficient concentration for transdermal optical detection. Here, Pd-porphyrins can be used as PEG cross-linkers to generate a polyamide hydrogel with extreme porphyrin density (≈5 × 10(-3) m). Dye aggregation is avoided due to the spatially constraining 3D mesh formed by the porphyrins themselves. The hydrogel exhibits oxygen-responsive phosphorescence and can be stably implanted subcutaneously in mice for weeks without degradation, bleaching, or host rejection. To further facilitate oxygen detection using steady-state techniques, an oxygen-non-responsive companion hydrogel is developed by blending copper and free base porphyrins to yield intensity-matched luminescence for ratiometric detection.
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Affiliation(s)
- Haoyuan Huang
- Departments of Biomedical and Chemical and Biological Engineering 201 Bonner Hall, University at Buffalo, Buffalo, NY, 14260, USA
| | - Wentao Song
- Departments of Biomedical and Chemical and Biological Engineering 201 Bonner Hall, University at Buffalo, Buffalo, NY, 14260, USA
| | - Guanying Chen
- Institute for Lasers, Photonics and Biophotonics 428 NSC, University at Buffalo, Buffalo, NY, 14260, USA. Department of Chemistry, 511 NSC, University at Buffalo, Buffalo, NY, 14260, USA
| | - Justin M. Reynard
- Department of Chemistry, 511 NSC, University at Buffalo, Buffalo, NY, 14260, USA
| | - Tymish Y. Ohulchanskyy
- Institute for Lasers, Photonics and Biophotonics 428 NSC, University at Buffalo, Buffalo, NY, 14260, USA. Department of Chemistry, 511 NSC, University at Buffalo, Buffalo, NY, 14260, USA
| | - Paras N. Prasad
- Institute for Lasers, Photonics and Biophotonics 428 NSC, University at Buffalo, Buffalo, NY, 14260, USA. Department of Chemistry, 511 NSC, University at Buffalo, Buffalo, NY, 14260, USA
| | - Frank V. Bright
- Department of Chemistry, 511 NSC, University at Buffalo, Buffalo, NY, 14260, USA
| | - Jonathan F. Lovell
- Departments of Biomedical and Chemical and Biological Engineering 201 Bonner Hall, University at Buffalo, Buffalo, NY, 14260, USA
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1116
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Fuoco C, Sangalli E, Vono R, Testa S, Sacchetti B, Latronico MVG, Bernardini S, Madeddu P, Cesareni G, Seliktar D, Rizzi R, Bearzi C, Cannata SM, Spinetti G, Gargioli C. 3D hydrogel environment rejuvenates aged pericytes for skeletal muscle tissue engineering. Front Physiol 2014; 5:203. [PMID: 24910618 PMCID: PMC4039010 DOI: 10.3389/fphys.2014.00203] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Accepted: 05/12/2014] [Indexed: 11/20/2022] Open
Abstract
Skeletal muscle tissue engineering is a promising approach for the treatment of muscular disorders. However, the complex organization of muscle, combined with the difficulty in finding an appropriate source of regenerative cells and in providing an adequate blood supply to the engineered tissue, makes this a hard task to face. In the present work, we describe an innovative approach to rejuvenate adult skeletal muscle-derived pericytes (MP) based on the use of a PEG-based hydrogel scaffold. MP were isolated from young (piglet) and adult (boar) pigs to assess whether aging affects tissue regeneration efficiency. In vitro, MP from boars had similar morphology and colony forming capacity to piglet MP, but an impaired ability to form myotubes and capillary-like structures. However, the use of a PEG-based hydrogel to support adult MP significantly improved their myogenic differentiation and angiogenic potentials in vitro and in vivo. Thus, PEG-based hydrogel scaffolds may provide a progenitor cell “niche” that promotes skeletal muscle regeneration and blood vessel growth, and together with pericytes may be developed for use in regenerative applications.
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Affiliation(s)
- Claudia Fuoco
- Department of Biology, University of Rome Tor Vergata Rome, Italy
| | | | | | | | - Benedetto Sacchetti
- Stem Cell Lab, Department of Molecular Medicine, Sapienza University of Rome Rome, Italy
| | | | | | - Paolo Madeddu
- Experimental Cardiovascular Medicine, University of Bristol Bristol, UK
| | - Gianni Cesareni
- Department of Biology, University of Rome Tor Vergata Rome, Italy ; IRCCS Fondazione Santa Lucia Rome, Italy
| | - Dror Seliktar
- Experimental Cardiovascular Medicine, University of Bristol Bristol, UK ; Faculty of Biomedical Engineering, Technion-Israel Institute of Technology Haifa, Israel
| | - Roberto Rizzi
- IRCCS MultiMedica Milan, Italy ; Cell Biology and Neurobiology Institute, National Research Council of Italy (CNR) Rome, Italy
| | - Claudia Bearzi
- IRCCS MultiMedica Milan, Italy ; Cell Biology and Neurobiology Institute, National Research Council of Italy (CNR) Rome, Italy
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1117
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Ding H, Zhong M, Kim YJ, Pholpabu P, Balasubramanian A, Hui CM, He H, Yang H, Matyjaszewski K, Bettinger CJ. Biologically derived soft conducting hydrogels using heparin-doped polymer networks. ACS NANO 2014; 8:4348-57. [PMID: 24738911 PMCID: PMC4046800 DOI: 10.1021/nn406019m] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Accepted: 04/16/2014] [Indexed: 05/28/2023]
Abstract
The emergence of flexible and stretchable electronic components expands the range of applications of electronic devices. Flexible devices are ideally suited for electronic biointerfaces because of mechanically permissive structures that conform to curvilinear structures found in native tissue. Most electronic materials used in these applications exhibit elastic moduli on the order of 0.1-1 MPa. However, many electronically excitable tissues exhibit elasticities in the range of 1-10 kPa, several orders of magnitude smaller than existing components used in flexible devices. This work describes the use of biologically derived heparins as scaffold materials for fabricating networks with hybrid electronic/ionic conductivity and ultracompliant mechanical properties. Photo-cross-linkable heparin-methacrylate hydrogels serve as templates to control the microstructure and doping of in situ polymerized polyaniline structures. Macroscopic heparin-doped polyaniline hydrogel dual networks exhibit impedances as low as Z = 4.17 Ω at 1 kHz and storage moduli of G' = 900 ± 100 Pa. The conductivity of heparin/polyaniline networks depends on the oxidation state and microstructure of secondary polyaniline networks. Furthermore, heparin/polyaniline networks support the attachment, proliferation, and differentiation of murine myoblasts without any surface treatments. Taken together, these results suggest that heparin/polyaniline hydrogel networks exhibit suitable physical properties as an electronically active biointerface material that can match the mechanical properties of soft tissues composed of excitable cells.
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Affiliation(s)
- Hangjun Ding
- School of Materials Science and Engineering, University of Science & Technology Beijing, 30 Xueyuan Road, Beijing 100083, People’s Republic of China
- Department of Chemistry, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Mingjiang Zhong
- Department of Chemistry, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Young Jo Kim
- Department of Materials Science and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Pitirat Pholpabu
- Department of Biomedical Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Aditya Balasubramanian
- Department of Materials Science and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Chin Ming Hui
- Department of Chemistry, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Hongkun He
- Department of Chemistry, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Huai Yang
- School of Engineering, Peking University, Beijing 100187, People’s Republic of China
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Christopher John Bettinger
- Department of Materials Science and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
- Department of Biomedical Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
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1118
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Gou M, Qu X, Zhu W, Xiang M, Yang J, Zhang K, Wei Y, Chen S. Bio-inspired detoxification using 3D-printed hydrogel nanocomposites. Nat Commun 2014; 5:3774. [PMID: 24805923 PMCID: PMC4024742 DOI: 10.1038/ncomms4774] [Citation(s) in RCA: 182] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Accepted: 04/02/2014] [Indexed: 02/05/2023] Open
Abstract
Rationally designed nanoparticles that can bind toxins show great promise for detoxification. However, the conventional intravenous administration of nanoparticles for detoxification often leads to nanoparticle accumulation in the liver, posing a risk of secondary poisoning especially in liver-failure patients. Here we present a liver-inspired three-dimensional (3D) detoxification device. This device is created by 3D printing of designer hydrogels with functional polydiacetylene nanoparticles installed in the hydrogel matrix. The nanoparticles can attract, capture and sense toxins, while the 3D matrix with a modified liver lobule microstructure allows toxins to be trapped efficiently. Our results show that the toxin solution completely loses its virulence after treatment using this biomimetic detoxification device. This work provides a proof-of-concept of detoxification by a 3D-printed biomimetic nanocomposite construct in hydrogel, and could lead to the development of alternative detoxification platforms.
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Affiliation(s)
- Maling Gou
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, P.R. China
- Shiley Eye Center and Institute for Genomic Medicine, University of California, San Diego, La Jolla, California 92093, USA
- These authors contributed equally to this work and are co-first authors
| | - Xin Qu
- Department of NanoEngineering, University of California, San Diego, La Jolla, California 92093, USA
- These authors contributed equally to this work and are co-first authors
| | - Wei Zhu
- Department of NanoEngineering, University of California, San Diego, La Jolla, California 92093, USA
| | - Mingli Xiang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, P.R. China
| | - Jun Yang
- School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, P.R. China
| | - Kang Zhang
- Shiley Eye Center and Institute for Genomic Medicine, University of California, San Diego, La Jolla, California 92093, USA
- Biomaterials and Tissue Engineering Center, University of California, San Diego, La Jolla, California 92093, USA
- Veterans Administration Healthcare System, San Diego, California 92093, USA
| | - Yuquan Wei
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, P.R. China
| | - Shaochen Chen
- Department of NanoEngineering, University of California, San Diego, La Jolla, California 92093, USA
- Biomaterials and Tissue Engineering Center, University of California, San Diego, La Jolla, California 92093, USA
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1119
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Volpati D, Aoki PHB, Alessio P, Pavinatto FJ, Miranda PB, Constantino CJL, Oliveira ON. Vibrational spectroscopy for probing molecular-level interactions in organic films mimicking biointerfaces. Adv Colloid Interface Sci 2014; 207:199-215. [PMID: 24530000 DOI: 10.1016/j.cis.2014.01.014] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 11/28/2013] [Accepted: 01/13/2014] [Indexed: 01/26/2023]
Abstract
Investigation into nanostructured organic films has served many purposes, including the design of functionalized surfaces that may be applied in biomedical devices and tissue engineering and for studying physiological processes depending on the interaction with cell membranes. Of particular relevance are Langmuir monolayers, Langmuir-Blodgett (LB) and layer-by-layer (LbL) films used to simulate biological interfaces. In this review, we shall focus on the use of vibrational spectroscopy methods to probe molecular-level interactions at biomimetic interfaces, with special emphasis on three surface-specific techniques, namely sum frequency generation (SFG), polarization-modulated infrared reflection absorption spectroscopy (PM-IRRAS) and surface-enhanced Raman scattering (SERS). The two types of systems selected for exemplifying the potential of the methods are the cell membrane models and the functionalized surfaces with biomolecules. Examples will be given on how SFG and PM-IRRAS can be combined to determine the effects from biomolecules on cell membrane models, which include determination of the orientation and preservation of secondary structure. Crucial information for the action of biomolecules on model membranes has also been obtained with PM-IRRAS, as is the case of chitosan removing proteins from the membrane. SERS will be shown as promising for enabling detection limits down to the single-molecule level. The strengths and limitations of these methods will also be discussed, in addition to the prospects for the near future.
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Affiliation(s)
- Diogo Volpati
- São Carlos Institute of Physics, University of São Paulo, CP 369, São Carlos, SP 13560-970, Brazil
| | - Pedro H B Aoki
- Faculty of Science and Technology, UNESP, Presidente Prudente, CEP 19060-900 SP,Brazil
| | - Priscila Alessio
- Faculty of Science and Technology, UNESP, Presidente Prudente, CEP 19060-900 SP,Brazil
| | - Felippe J Pavinatto
- São Carlos Institute of Physics, University of São Paulo, CP 369, São Carlos, SP 13560-970, Brazil
| | - Paulo B Miranda
- São Carlos Institute of Physics, University of São Paulo, CP 369, São Carlos, SP 13560-970, Brazil
| | | | - Osvaldo N Oliveira
- São Carlos Institute of Physics, University of São Paulo, CP 369, São Carlos, SP 13560-970, Brazil.
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1120
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1121
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Chen Q, Wu J, Zhuang Q, Lin X, Zhang J, Lin JM. Microfluidic isolation of highly pure embryonic stem cells using feeder-separated co-culture system. Sci Rep 2014; 3:2433. [PMID: 23942279 PMCID: PMC3743058 DOI: 10.1038/srep02433] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Accepted: 07/25/2013] [Indexed: 01/09/2023] Open
Abstract
Engineered artificial tissues from stem cells show great potential in regenerative medicine, disease therapies and organ transplantation. To date, stem cells are typically co-cultured with inactivated feeder layers to maintain their undifferentiated state, and to ensure reliable cell purity. Herein, we propose a novel microfabricated approach for feeder-separated coculture of mouse embryonic stem (mES) cells on polydimethylsiloxane (PDMS) porous membrane-assembled 3D-microdevice. Normal mouse embryonic fibroblasts (mEFs) without inactivation were specifically co-cultured with mES cells, resulting in the formation of mES cell colonies on spatially controlled co-culture with feeder layers. An excellent undifferentiated state was confirmed by the expressions of Nanog, octamer binding protein 4 (Oct-4) and alkaline phosphatase (ALP) after 5 days culture. As a result, with the significant advantages of efficiency and simplicity, pure mES cell populations (a purity of 89.2%) from mEFs co-cultures were easily collected without any further purification or separation.
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Affiliation(s)
- Qiushui Chen
- Department of Chemistry, Beijing Key Laboratory Microanalysis and Instrumentation, Tsinghua University, Beijing 100084, P.R. China
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1122
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Huang H, Zhang X, Hu X, Dai L, Zhu J, Man Z, Chen H, Zhou C, Ao Y. Directing chondrogenic differentiation of mesenchymal stem cells with a solid-supported chitosan thermogel for cartilage tissue engineering. Biomed Mater 2014; 9:035008. [PMID: 24770944 DOI: 10.1088/1748-6041/9/3/035008] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Hydrogels are attractive for cartilage tissue engineering because of their high plasticity and similarity with the native cartilage matrix. However, one critical drawback of hydrogels for osteochondral repair is their inadequate mechanical strength. To address this limitation, we constructed a solid-supported thermogel comprising a chitosan hydrogel system and demineralized bone matrix. Scanning electron microscopy, the equilibrium scanning ratio, the biodegradation rate, biomechanical tests, biochemical assays, metabolic activity tests, immunostaining and cartilage-specific gene expression analysis were used to evaluate the solid-supported thermogel. Compared with pure hydrogel or demineralized matrix, the hybrid biomaterial showed superior porosity, equilibrium swelling and degradation rate. The hybrid scaffolds exhibited an increased mechanical strength: 75% and 30% higher compared with pure hydrogels and demineralized matrix, respectively. After three days culture, bone-derived mesenchymal stem cells (BMSCs) maintained viability above 90% in all three materials; however, the cell retention of the hybrid scaffolds was more efficient and uniform than the other materials. Matrix production and chondrogenic differentiation of BMSCs in the hybrid scaffolds were superior to its precursors, based on glycosaminoglycan quantification and hyaline cartilage marker expression after three weeks in culture. Its easy preparation, favourable biophysical properties and chondrogenic capacity indicated that this solid-supported thermogel could be an attractive biomaterial framework for cartilage tissue engineering.
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Affiliation(s)
- Hongjie Huang
- Institute of Sports Medicine, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing 100191, People's Republic of China
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1123
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Ovsianikov A, Mühleder S, Torgersen J, Li Z, Qin XH, Van Vlierberghe S, Dubruel P, Holnthoner W, Redl H, Liska R, Stampfl J. Laser photofabrication of cell-containing hydrogel constructs. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:3787-94. [PMID: 24033187 DOI: 10.1021/la402346z] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The two-photon polymerization (2PP) of photosensitive gelatin in the presence of living cells is reported. The 2PP technique is based on the localized cross-linking of photopolymers induced by femtosecond laser pulses. The availability of water-soluble photoinitiators (PI) suitable for 2PP is crucial for applying this method to cell-containing materials. Novel PIs developed by our group allow 2PP of formulations with up to 80% cell culture medium. The cytocompatibility of these PIs was evaluated by an MTT assay. The results of cell encapsulation by 2PP show the occurrence of cell damage within the laser-exposed regions. However, some cells located in the immediate vicinity and even within the 2PP-produced structures remain viable and can further proliferate. The control experiments demonstrate that the laser radiation itself does not damage the cells at the parameters used for 2PP. On the basis of these findings and the reports by other groups, we conclude that such localized cell damage is of a chemical origin and can be attributed to reactive species generated during 2PP. The viable cells trapped within the 2PP structures but not exposed to laser radiation continued to proliferate. The live/dead staining after 3 weeks revealed viable cells occupying most of the space available within the 3D hydrogel constructs. While some of the questions raised by this study remain open, the presented results indicate the general practicability of 2PP for 3D processing of cell-containing materials. The potential applications of this highly versatile approach span from precise engineering of 3D tissue models to the fabrication of cellular microarrays.
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Affiliation(s)
- Aleksandr Ovsianikov
- Institute of Materials Science and Technology, Vienna University of Technology , Favoritenstrasse 9-11, Vienna, Austria
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1124
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Textor JA, Murphy KC, Leach JK, Tablin F. Ultrastructure and growth factor content of equine platelet-rich fibrin gels. Am J Vet Res 2014; 75:392-401. [DOI: 10.2460/ajvr.75.4.392] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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1125
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Bidarra SJ, Barrias CC, Granja PL. Injectable alginate hydrogels for cell delivery in tissue engineering. Acta Biomater 2014; 10:1646-62. [PMID: 24334143 DOI: 10.1016/j.actbio.2013.12.006] [Citation(s) in RCA: 343] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Revised: 11/28/2013] [Accepted: 12/05/2013] [Indexed: 12/16/2022]
Abstract
Alginate hydrogels are extremely versatile and adaptable biomaterials, with great potential for use in biomedical applications. Their extracellular matrix-like features have been key factors for their choice as vehicles for cell delivery strategies aimed at tissue regeneration. A variety of strategies to decorate them with biofunctional moieties and to modulate their biophysical properties have been developed recently, which further allow their tailoring to the desired application. Additionally, their potential use as injectable materials offers several advantages over preformed scaffold-based approaches, namely: easy incorporation of therapeutic agents, such as cells, under mild conditions; minimally invasive local delivery; and high contourability, which is essential for filling in irregular defects. Alginate hydrogels have already been explored as cell delivery systems to enhance regeneration in different tissues and organs. Here, the in vitro and in vivo potential of injectable alginate hydrogels to deliver cells in a targeted fashion is reviewed. In each example, the selected crosslinking approach, the cell type, the target tissue and the main findings of the study are highlighted.
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Affiliation(s)
- Sílvia J Bidarra
- INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua do Campo Alegre, 823, 4150-180 Porto, Portugal.
| | - Cristina C Barrias
- INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua do Campo Alegre, 823, 4150-180 Porto, Portugal.
| | - Pedro L Granja
- INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua do Campo Alegre, 823, 4150-180 Porto, Portugal; FEUP - Faculdade de Engenharia da Universidade do Porto, Departamento de Engenharia Metalúrgica e de Materiais, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal; ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
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1126
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Jiang Y, Chen J, Deng C, Suuronen EJ, Zhong Z. Click hydrogels, microgels and nanogels: emerging platforms for drug delivery and tissue engineering. Biomaterials 2014; 35:4969-85. [PMID: 24674460 DOI: 10.1016/j.biomaterials.2014.03.001] [Citation(s) in RCA: 492] [Impact Index Per Article: 49.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 03/03/2014] [Indexed: 02/06/2023]
Abstract
Hydrogels, microgels and nanogels have emerged as versatile and viable platforms for sustained protein release, targeted drug delivery, and tissue engineering due to excellent biocompatibility, a microporous structure with tunable porosity and pore size, and dimensions spanning from human organs, cells to viruses. In the past decade, remarkable advances in hydrogels, microgels and nanogels have been achieved with click chemistry. It is a most promising strategy to prepare gels with varying dimensions owing to its high reactivity, superb selectivity, and mild reaction conditions. In particular, the recent development of copper-free click chemistry such as strain-promoted azide-alkyne cycloaddition, radical mediated thiol-ene chemistry, Diels-Alder reaction, tetrazole-alkene photo-click chemistry, and oxime reaction renders it possible to form hydrogels, microgels and nanogels without the use of potentially toxic catalysts or immunogenic enzymes that are commonly required. Notably, unlike other chemical approaches, click chemistry owing to its unique bioorthogonal feature does not interfere with encapsulated bioactives such as living cells, proteins and drugs and furthermore allows versatile preparation of micropatterned biomimetic hydrogels, functional microgels and nanogels. In this review, recent exciting developments in click hydrogels, microgels and nanogels, as well as their biomedical applications such as controlled protein and drug release, tissue engineering, and regenerative medicine are presented and discussed.
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Affiliation(s)
- Yanjiao Jiang
- Biomedical Polymers Laboratory, and Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
| | - Jing Chen
- Biomedical Polymers Laboratory, and Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
| | - Chao Deng
- Biomedical Polymers Laboratory, and Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China.
| | - Erik J Suuronen
- Division of Cardiac Surgery, University of Ottawa Heart Institute, Ottawa K1Y 4W7, Canada
| | - Zhiyuan Zhong
- Biomedical Polymers Laboratory, and Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China.
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1127
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Moysan E, González-Fernández Y, Lautram N, Béjaud J, Bastiat G, Benoit JP. An innovative hydrogel of gemcitabine-loaded lipid nanocapsules: when the drug is a key player of the nanomedicine structure. SOFT MATTER 2014; 10:1767-1777. [PMID: 24652455 DOI: 10.1039/c3sm52781f] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A new method to form a nanoparticle-structured hydrogel is reported; it is based on the drug being loaded into the nanoparticles to form a solid structure. A lipophilic form of gemcitabine (modified lauroyl), an anti-cancer drug, was encapsulated in lipid nanocapsules (LNCs), using a phase-inversion temperature process. A gel was formed spontaneously, depending on the LNC concentration. The drug loading, measured with total entrapment efficiency, and the rheological properties of the gel were assessed. Physical studies (surface tension measurements) showed that modified gemcitabine was localised at the oil-water interface of the LNC, and that the gemcitabine moieties of the prodrug were exposed to the water phase. This particular assembly promoted inter-LNC interactions via hydrogen bonds between gemcitabine moieties that led to an LNC gel structure in water, without a matrix, like a tridimensional pearl necklace. Dilution of the gel produced a gemcitabine-loaded LNC suspension in water, and these nanoparticles presented cytotoxic activity to various cancer cell lines to a greater degree than the native drug. Finally, the syringeability of the formulation was successfully tested and perspectives of its use as a nanomedicine (intratumoural or subcutaneous injection) can be foreseen.
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Affiliation(s)
- Elodie Moysan
- LUNAM Université - Micro et Nanomédecines Biomimétiques, Université d'Angers - UMR_S1066 (MINT), IBS-CHU Angers, 4 rue Larrey, F-49933 Angers, France.
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1128
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Boere KWM, Soliman BG, Rijkers DTS, Hennink WE, Vermonden T. Thermoresponsive Injectable Hydrogels Cross-Linked by Native Chemical Ligation. Macromolecules 2014. [DOI: 10.1021/ma5000927] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Kristel W. M. Boere
- Department
of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS),
Faculty of Science, Utrecht University, P.O. Box 80082, 3508 TB Utrecht, The Netherlands
| | - Bram G. Soliman
- Department
of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS),
Faculty of Science, Utrecht University, P.O. Box 80082, 3508 TB Utrecht, The Netherlands
| | - Dirk T. S. Rijkers
- Medicinal Chemistry & Chemical Biology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Faculty of Science, Utrecht University, P.O. Box 80082, 3508 TB Utrecht, The Netherlands
| | - Wim E. Hennink
- Department
of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS),
Faculty of Science, Utrecht University, P.O. Box 80082, 3508 TB Utrecht, The Netherlands
| | - Tina Vermonden
- Department
of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS),
Faculty of Science, Utrecht University, P.O. Box 80082, 3508 TB Utrecht, The Netherlands
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1129
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Xia LW, Xie R, Ju XJ, Wang W, Chen Q, Chu LY. Nano-structured smart hydrogels with rapid response and high elasticity. Nat Commun 2014; 4:2226. [PMID: 23900497 PMCID: PMC3731657 DOI: 10.1038/ncomms3226] [Citation(s) in RCA: 390] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Accepted: 07/02/2013] [Indexed: 02/03/2023] Open
Abstract
Smart hydrogels, or stimuli-responsive hydrogels, are three-dimensional networks composed of crosslinked hydrophilic polymer chains that are able to dramatically change their volume and other properties in response to environmental stimuli such as temperature, pH and certain chemicals. Rapid and significant response to environmental stimuli and high elasticity are critical for the versatility of such smart hydrogels. Here we report the synthesis of smart hydrogels which are rapidly responsive, highly swellable and stretchable, by constructing a nano-structured architecture with activated nanogels as nano-crosslinkers. The nano-structured smart hydrogels show very significant and rapid stimuli-responsive characteristics, as well as highly elastic properties to sustain high compressions, resist slicing and withstand high level of deformation, such as bending, twisting and extensive stretching. Because of the concurrent rapid and significant stimuli-response and high elasticity, these nano-structured smart hydrogels may expand the scope of hydrogel applications, and provide enhanced performance in their applications. Smart hydrogels are 3D networks composed of cross-linked polymer chains that can alter their shape and properties in response to environmental stimuli. Xia et al. demonstrate a smart hydrogel with rapid response and high elasticity, due to its nano-scale structure.
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Affiliation(s)
- Lie-Wen Xia
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
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1130
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Jung H, Park JS, Yeom J, Selvapalam N, Park KM, Oh K, Yang JA, Park KH, Hahn SK, Kim K. 3D tissue engineered supramolecular hydrogels for controlled chondrogenesis of human mesenchymal stem cells. Biomacromolecules 2014; 15:707-14. [PMID: 24605794 DOI: 10.1021/bm401123m] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Despite a wide investigation of hydrogels as an artificial extracellular matrix, there are few scaffold systems for the facile spatiotemporal control of mesenchymal stem cells (MSCs). Here, we report 3D tissue engineered supramolecular hydrogels prepared with highly water-soluble monofunctionalized cucurbit[6]uril-hyaluronic acid (CB[6]-HA), diaminohexane conjugated HA (DAH-HA), and drug conjugated CB[6] (drug-CB[6]) for the controlled chondrogenesis of human mesenchymal stem cells (hMSCs). The mechanical property of supramolecular HA hydrogels was modulated by changing the cross-linking density for the spatial control of hMSCs. In addition, the differentiation of hMSCs was temporally controlled by changing the release profiles of transforming growth factor-β3 (TGF-β3) and/or dexamethasone (Dexa) from the hydrolyzable Dexa-CB[6]. The effective chondrogenic differentiation of hMSCs encapsulated in the monoCB[6]/DAH-HA hydrogel with TGF-β3 and Dexa-CB[6] was confirmed by biochemical glycosaminoglycan content analysis, real-time quantitative PCR, histological, and immunohistochemical analyses. Taken together, we could confirm the feasibility of cytocompatible monoCB[6]/DAH-HA hydrogels as a platform scaffold with controlled drug delivery for cartilage regeneration and other various tissue engineering applications.
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Affiliation(s)
- Hyuntae Jung
- School of Interdisciplinary Bioscience and Bioengineering, §Department of Materials Science and Engineering, and ∥Center for Self-Assembly and Complexity, Institute for Basic Science, Department of Chemistry, Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH) , San 31, Hyoja-dong, Nam-gu, Pohang, Kyungbuk 790-784, Korea
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1131
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Bearzi C, Gargioli C, Baci D, Fortunato O, Shapira-Schweitzer K, Kossover O, Latronico MVG, Seliktar D, Condorelli G, Rizzi R. PlGF-MMP9-engineered iPS cells supported on a PEG-fibrinogen hydrogel scaffold possess an enhanced capacity to repair damaged myocardium. Cell Death Dis 2014; 5:e1053. [PMID: 24525729 PMCID: PMC3944231 DOI: 10.1038/cddis.2014.12] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 12/06/2013] [Accepted: 12/12/2013] [Indexed: 01/08/2023]
Abstract
Cell-based regenerative therapies are significantly improved by engineering allografts to express factors that increase vascularization and engraftment, such as placental growth factor (PlGF) and matrix metalloproteinase 9 (MMP9). Moreover, the seeding of therapeutic cells onto a suitable scaffold is of utmost importance for tissue regeneration. On these premises, we sought to assess the reparative potential of induced pluripotent stem (iPS) cells bioengineered to secrete PlGF or MMP9 and delivered to infarcted myocardium upon a poly(ethylene glycol)-fibrinogen scaffold. When assessing optimal stiffness of the PEG-fibrinogen (PF) scaffold, we found that the appearance of contracting cells after cardiogenic induction was accelerated on the support designed with an intermediate stiffness. Revascularization and hemodynamic parameters of infarcted mouse heart were significantly improved by injection into the infarct of this optimized PF scaffold seeded with both MiPS (iPS cells engineered to secrete MMP9) and PiPS (iPS cells engineered to secrete PlGF) cells as compared with nonengineered cells or PF alone. Importantly, allograft-derived cells and host myocardium were functionally integrated. Therefore, survival and integration of allografts in the ischemic heart can be significantly improved with the use of therapeutic cells bioengineered to secrete MMP9 and PlGF and encapsulated within an injectable PF hydrogel having an optimized stiffness.
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Affiliation(s)
- C Bearzi
- 1] Istituto Ricovero Cura Carattere Scientifico MultiMedica, Milan, Italy [2] Cell Biology and Neurobiology Institute, National Research Council of Italy (CNR), Rome, Italy
| | - C Gargioli
- Istituto Ricovero Cura Carattere Scientifico MultiMedica, Milan, Italy
| | - D Baci
- Istituto Ricovero Cura Carattere Scientifico MultiMedica, Milan, Italy
| | - O Fortunato
- Istituto Ricovero Cura Carattere Scientifico MultiMedica, Milan, Italy
| | - K Shapira-Schweitzer
- Faculty of Biomedical Engineering, Technion-Israel Institute of Technology, Haifa, Israel
| | - O Kossover
- Faculty of Biomedical Engineering, Technion-Israel Institute of Technology, Haifa, Israel
| | - M V G Latronico
- Humanitas Clinical and Research Center, Rozzano, Milan, Italy
| | - D Seliktar
- Faculty of Biomedical Engineering, Technion-Israel Institute of Technology, Haifa, Israel
| | - G Condorelli
- Humanitas Clinical and Research Center, Rozzano, Milan, Italy
| | - R Rizzi
- 1] Istituto Ricovero Cura Carattere Scientifico MultiMedica, Milan, Italy [2] Cell Biology and Neurobiology Institute, National Research Council of Italy (CNR), Rome, Italy
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1132
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Cong HP, Wang P, Yu SH. Highly elastic and superstretchable graphene oxide/polyacrylamide hydrogels. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:448-53. [PMID: 24019160 DOI: 10.1002/smll.201301591] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Revised: 07/13/2013] [Indexed: 05/04/2023]
Affiliation(s)
- Huai-Ping Cong
- School of Chemical Engineering, Hefei University of Technology, Hefei, 230009, P. R. China; Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, P. R. China
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1133
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Zhao X. Multi-scale multi-mechanism design of tough hydrogels: building dissipation into stretchy networks. SOFT MATTER 2014; 10:672-87. [PMID: 24834901 PMCID: PMC4040255 DOI: 10.1039/c3sm52272e] [Citation(s) in RCA: 608] [Impact Index Per Article: 60.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
As swollen polymer networks in water, hydrogels are usually brittle. However, hydrogels with high toughness play critical roles in many plant and animal tissues as well as in diverse engineering applications. Here we review the intrinsic mechanisms of a wide variety of tough hydrogels developed over the past few decades. We show that tough hydrogels generally possess mechanisms to dissipate substantial mechanical energy but still maintain high elasticity under deformation. The integrations and interactions of different mechanisms for dissipating energy and maintaining elasticity are essential to the design of tough hydrogels. A matrix that combines various mechanisms is constructed for the first time to guide the design of next-generation tough hydrogels. We further highlight that a particularly promising strategy for the design is to implement multiple mechanisms across multiple length scales into nano-, micro-, meso-, and macro-structures of hydrogels.
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Affiliation(s)
- Xuanhe Zhao
- Soft Active Materials Laboratory, Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA.
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1134
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Wang J, Yang W, Xie H, Song Y, Li Y, Wang L. Ischemic stroke and repair: current trends in research and tissue engineering treatments. Regen Med Res 2014; 2:3. [PMID: 25984331 PMCID: PMC4389883 DOI: 10.1186/2050-490x-2-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Accepted: 10/24/2013] [Indexed: 03/15/2023] Open
Abstract
Stroke, the third leading cause of mortality, is usually associated with severe disabilities, high recurrence rate and other poor outcomes. Currently, there are no long-term effective treatments for stroke. Cell and cytokine therapies have been explored previously. However, the therapeutic outcomes are often limited by poor survival of transplanted cells, uncontrolled cell differentiation, ineffective engraftment with host tissues and non-sustained delivery of growth factors. A tissue-engineering approach provides an alternative for treating ischemic stroke. The key design considerations for the tissue engineering approach include: choice of scaffold materials, choice of cells and cytokines and delivery methods. Here, we review current cell and biomaterial based therapies available for ischemic stroke, with a special focus on tissue-engineering strategies for regeneration of stroke-affected neuronal tissue.
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Affiliation(s)
- Jian Wang
- Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wen Yang
- Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hongjian Xie
- Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yu Song
- Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yongkui Li
- Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lin Wang
- Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China ; Medical Research Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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1135
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The effect of matrix stiffness of injectable hydrogels on the preservation of cardiac function after a heart attack. Biomaterials 2014; 35:1429-38. [PMID: 24268664 DOI: 10.1016/j.biomaterials.2013.10.058] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Accepted: 10/19/2013] [Indexed: 01/06/2023]
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1136
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García AJ. PEG-maleimide hydrogels for protein and cell delivery in regenerative medicine. Ann Biomed Eng 2014; 42:312-22. [PMID: 23881112 PMCID: PMC3875614 DOI: 10.1007/s10439-013-0870-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Accepted: 07/15/2013] [Indexed: 01/05/2023]
Abstract
Protein- and cell-based therapies represent highly promising strategies for regenerative medicine, immunotherapy, and oncology. However, these therapies are significantly limited by delivery considerations, particularly in terms of protein stability and dosing kinetics as well as cell survival, engraftment, and function. Hydrogels represent versatile and robust delivery vehicles for proteins and cells due to their high water content that retains protein biological activity, high cytocompatibility and minimal adverse host reactions, flexibility and tunability in terms of chemistry, structure, and polymerization format, ability to incorporate various biomolecules to convey biofunctionality, and opportunity for minimally invasive delivery as injectable carriers. This review highlights recent progress in the engineering of poly(ethylene glycol) hydrogels cross-linked using maleimide reactive groups for protein and cell delivery.
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Affiliation(s)
- Andrés J García
- Woodruff School of Mechanical Engineering, Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA,
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1137
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Zhang Q, Zhang L, Wang P, Du S. Coordinate Bonding Strategy for Molecularly Imprinted Hydrogels: Toward pH-Responsive Doxorubicin Delivery. J Pharm Sci 2014; 103:643-51. [DOI: 10.1002/jps.23838] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Revised: 11/06/2013] [Accepted: 12/10/2013] [Indexed: 01/17/2023]
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1138
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Lee C, Choi JS, Kim I, Byeon HJ, Kim TH, Oh KT, Lee ES, Lee KC, Youn YS. Decanoic acid-modified glycol chitosan hydrogels containing tightly adsorbed palmityl-acylated exendin-4 as a long-acting sustained-release anti-diabetic system. Acta Biomater 2014; 10:812-20. [PMID: 24140611 DOI: 10.1016/j.actbio.2013.10.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Revised: 10/02/2013] [Accepted: 10/10/2013] [Indexed: 11/16/2022]
Abstract
Decanoic acid-modified glycol chitosan (DA-GC) hydrogels containing tightly adsorbed palmitic acid-modified exendin-4 (Ex4-C16) were prepared, and their pharmaceutical abilities as a long-acting sustained-release exendin-4 system for the treatment of diabetes were evaluated. Glycol chitosan (GC) was conjugated with N-hydroxysuccinimide-activated decanoic acid (DA) in anhydrous 0.4% dimethylaminopyridine/dimethylsulfoxide at different feed ratios. DA-GC hydrogels formed by physical self-assembly during dialysis vs. deionized water, and their inner network structures, swelling or gel-forming abilities and release properties were examined. The hypoglycemia caused by Ex4-C16-loaded DA-GC hydrogels was evaluated by subcutaneous administration in type 2 diabetic db/db mice. The results obtained showed that GC prepared at a DA:GC feed ratio of 1:100 had optimal properties with respect to hydrogel swelling, stiffness and Ex4-C16 incorporation, whereas DA-GC hydrogels prepared at a feed ratio of greater than 1:100 formed gels that were too stiff. The in vitro and in vivo release of Ex4-C16 from DA-GC hydrogels was dramatically delayed compared with native Ex4 probably due to strong hydrophobic interactions. In particular, Ex4-C16 in DA-GC hydrogels was found to be present around the injection site up to 10 days after subcutaneous administration, whereas Ex4 in DA-GC hydrogels was cleared from injection sites in ≈ 2 days in ICR mice. Finally, the hypoglycemia induced by Ex4-C16 DA-GC hydrogels was maintained for >7 days. Our findings demonstrate that Ex4-C16 DA-GC hydrogels offer a potential delivery system for the long-term treatment of type 2 diabetes.
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Affiliation(s)
- Changkyu Lee
- School of Pharmacy, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon 440-746, Republic of Korea
| | - Ji Su Choi
- School of Pharmacy, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon 440-746, Republic of Korea
| | - Insoo Kim
- School of Pharmacy, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon 440-746, Republic of Korea
| | - Hyeong Jun Byeon
- School of Pharmacy, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon 440-746, Republic of Korea
| | - Tae Hyung Kim
- School of Pharmacy, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon 440-746, Republic of Korea
| | - Kyung Taek Oh
- College of Pharmacy, Chung-Ang University, 221 Heukseok dong, Dongjak-gu, Seoul 155-756, Republic of Korea
| | - Eun Seong Lee
- Division of Biotechnology, The Catholic University of Korea, 43-1 Yeokgok 2-dong, Wonmi-gu, Bucheon-si, Gyeonggi-do 420-743, Republic of Korea
| | - Kang Choon Lee
- School of Pharmacy, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon 440-746, Republic of Korea
| | - Yu Seok Youn
- School of Pharmacy, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon 440-746, Republic of Korea.
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1139
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Aberle T, Franke K, Rist E, Benz K, Schlosshauer B. Cell-type specific four-component hydrogel. PLoS One 2014; 9:e86740. [PMID: 24475174 PMCID: PMC3903574 DOI: 10.1371/journal.pone.0086740] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 12/17/2013] [Indexed: 12/13/2022] Open
Abstract
In the field of regenerative medicine we aim to develop implant matrices for specific tissue needs. By combining two per se, cell-permissive gel systems with enzymatic crosslinkers (gelatin/transglutaminase and fibrinogen/thrombin) to generate a blend (technical term: quattroGel), an unexpected cell-selectivity evolved. QuattroGels were porous and formed cavities in the cell diameter range, possessed gelation kinetics in the minute range, viscoelastic properties and a mechanical strength appropriate for general cell adhesion, and restricted diffusion. Cell proliferation of endothelial cells, chondrocytes and fibroblasts was essentially unaffected. In contrast, on quattroGels neither endothelial cells formed vascular tubes nor did primary neurons extend neurites in significant amounts. Only chondrocytes differentiated properly as judged by collagen isoform expression. The biophysical quattroGel characteristics appeared to leave distinct cell processes such as mitosis unaffected and favored differentiation of sessile cells, but hampered differentiation of migratory cells. This cell-type selectivity is of interest e.g. during articular cartilage or invertebral disc repair, where pathological innervation and angiogenesis represent adverse events in tissue engineering.
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Affiliation(s)
- Timo Aberle
- Naturwissenschaftliches und Medizinisches Institut an der Universität Tübingen, Reutlingen, Germany
| | - Katrin Franke
- Naturwissenschaftliches und Medizinisches Institut an der Universität Tübingen, Reutlingen, Germany
| | - Elke Rist
- Naturwissenschaftliches und Medizinisches Institut an der Universität Tübingen, Reutlingen, Germany
| | - Karin Benz
- Naturwissenschaftliches und Medizinisches Institut an der Universität Tübingen, Reutlingen, Germany
| | - Burkhard Schlosshauer
- Naturwissenschaftliches und Medizinisches Institut an der Universität Tübingen, Reutlingen, Germany
- * E-mail:
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1140
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Fan R, Deng X, Zhou L, Gao X, Fan M, Wang Y, Guo G. Injectable thermosensitive hydrogel composite with surface-functionalized calcium phosphate as raw materials. Int J Nanomedicine 2014; 9:615-26. [PMID: 24489468 PMCID: PMC3904811 DOI: 10.2147/ijn.s52689] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
In this study, L-lactide was used to modify the tricalcium phosphate (β-TCP) and tetracalcium phosphate (TTCP) surface which can form functionalized poly(l-lactic acid) (PLLA)-grafted β-TCP (g-β-TCP) and PLLA-grafted TTCP (g-TTCP) particles. The g-β-TCP and g-TTCP obtained were incorporated into a PEG-PCL-PEG (PECE) matrix to prepare injectable thermosensitive hydrogel composites. The morphology of the hydrogel composites showed that the g-β-TCP and g-TTCP particles dispersed homogeneously into the polymer matrix, and each hydrogel composite had a three-dimensional network structure. Rheologic analysis showed that the composite had good thermosensitivity. Changes in calcium concentration and pH in simulated body fluid solutions confirmed the feasibility of surface-functionalized calcium phosphate for controlled release of calcium. All the results indicate that g-β-TCP/PECE and g-TTCP/PECE hydrogels might be a promising protocol for tissue engineering.
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Affiliation(s)
- RangRang Fan
- State Key Laboratory of Biotherapy and Cancer Center, Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, People's Republic of China
| | - XiaoHui Deng
- Department of Human Anatomy, Xinxiang Medical University, Xinxiang, People's Republic of China
| | - LiangXue Zhou
- State Key Laboratory of Biotherapy and Cancer Center, Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, People's Republic of China
| | - Xiang Gao
- State Key Laboratory of Biotherapy and Cancer Center, Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, People's Republic of China
| | - Min Fan
- State Key Laboratory of Biotherapy and Cancer Center, Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, People's Republic of China
| | - YueLong Wang
- State Key Laboratory of Biotherapy and Cancer Center, Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, People's Republic of China
| | - Gang Guo
- State Key Laboratory of Biotherapy and Cancer Center, Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, People's Republic of China
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1141
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Zhang S, Liu X, Barreto-Ortiz SF, Yu Y, Ginn BP, DeSantis NA, Hutton DL, Grayson WL, Cui FZ, Korgel BA, Gerecht S, Mao HQ. Creating polymer hydrogel microfibres with internal alignment via electrical and mechanical stretching. Biomaterials 2014; 35:3243-51. [PMID: 24439410 DOI: 10.1016/j.biomaterials.2013.12.081] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Accepted: 12/23/2013] [Indexed: 01/16/2023]
Abstract
Hydrogels have been widely used for 3-dimensional (3D) cell culture and tissue regeneration due to their tunable biochemical and physicochemical properties as well as their high water content, which resembles the aqueous microenvironment of the natural extracellular matrix. While many properties of natural hydrogel matrices are modifiable, their intrinsic isotropic structure limits the control over cellular organization, which is critical to restore tissue function. Here we report a generic approach to incorporate alignment topography inside the hydrogel matrix using a combination of electrical and mechanical stretching. Hydrogel fibres with uniaxial alignment were prepared from aqueous solutions of natural polymers such as alginate, fibrin, gelatin, and hyaluronic acid under ambient conditions. The unique internal alignment feature drastically enhances the mechanical properties of the hydrogel microfibres. Furthermore, the facile, organic solvent-free processing conditions are amenable to the incorporation of live cells within the hydrogel fibre or on the fibre surface; both approaches effectively induce cellular alignment. This work demonstrates a versatile and scalable strategy to create aligned hydrogel microfibres from various natural polymers.
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Affiliation(s)
- Shuming Zhang
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA; Translational Tissue Engineering Centre, Johns Hopkins University, Baltimore, MD 21287, USA; Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Xi Liu
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA; Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Sebastian F Barreto-Ortiz
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA; Johns Hopkins Physical Sciences-Oncology Centre, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Yixuan Yu
- Department of Chemical Engineering, University of Texas at Austin, Austin, TX 78712, USA
| | - Brian P Ginn
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA; Translational Tissue Engineering Centre, Johns Hopkins University, Baltimore, MD 21287, USA; Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Nicholas A DeSantis
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Daphne L Hutton
- Translational Tissue Engineering Centre, Johns Hopkins University, Baltimore, MD 21287, USA; Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA; Department of Biomedical Engineering, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Warren L Grayson
- Translational Tissue Engineering Centre, Johns Hopkins University, Baltimore, MD 21287, USA; Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA; Department of Biomedical Engineering, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Fu-Zhai Cui
- Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Brian A Korgel
- Department of Chemical Engineering, University of Texas at Austin, Austin, TX 78712, USA
| | - Sharon Gerecht
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA; Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA; Johns Hopkins Physical Sciences-Oncology Centre, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Hai-Quan Mao
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA; Translational Tissue Engineering Centre, Johns Hopkins University, Baltimore, MD 21287, USA; Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA.
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1142
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Such-Sanmartín G, Ventura-Espejo E, Jensen ON. Depletion of abundant plasma proteins by poly(N-isopropylacrylamide-acrylic acid) hydrogel particles. Anal Chem 2014; 86:1543-50. [PMID: 24428553 DOI: 10.1021/ac403749j] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Protein and proteome analysis of human blood plasma presents a challenge to current analytical platforms such as mass spectrometry (MS). High abundance plasma proteins interfere with detection of potential protein biomarkers that are often 3-10 orders of magnitude lower in concentration. We report the application of pH-sensitive poly(N-isopropylacrylamide-acrylic acid) hydrogel particles for removal of abundant plasma proteins, prior to proteome analysis by MS. Protein depletion occurs by two separate mechanisms: (1) hydrogel particles incubated with low concentrations of plasma capture abundant proteins at higher efficiency than low abundance proteins, which are enriched in the supernatants, whereas (2) hydrogel particles incubated with high concentrations of plasma capture and irreversibly trap abundant proteins. During the elution step, irreversibly trapped proteins remain captured while low abundance proteins are released and recovered in the eluate. We developed a series of distinct depletion protocols that proved useful for sample depletion and fractionation and facilitated targeted analysis of putative biomarkers such as IGF1-2, IBP2-7, ALS, KLK6-7, ISK5, and PLF4 by selected reaction monitoring (SRM) liquid chromatography (LC)-MS/MS. This novel use of hydrogel particles opens new perspectives for biomarker analysis based on mass spectrometry.
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Affiliation(s)
- Gerard Such-Sanmartín
- Department of Biochemistry and Molecular Biology, University of Southern Denmark , Odense M, DK-5230, Denmark
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1143
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Gramlich WM, Holloway JL, Rai R, Burdick JA. Transdermal gelation of methacrylated macromers with near-infrared light and gold nanorods. NANOTECHNOLOGY 2014; 25:014004. [PMID: 24334436 DOI: 10.1088/0957-4484/25/1/014004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Injectable hydrogels provide locally controlled tissue bulking and a means to deliver drugs and cells to the body. The formation of hydrogels in vivo may involve the delivery of two solutions that spontaneously crosslink when mixed, with pH or temperature changes, or with light (e.g., visible or ultraviolet). With these approaches, control over the kinetics of gelation, introduction of the initiation trigger (e.g., limited penetration of ultraviolet light through tissues), or alteration of the material physical properties (e.g., mechanics) may be difficult to achieve. To overcome these limitations, we used the interaction of near-infrared (NIR) light with gold nanorods (AuNRs) to generate heat through the photothermal effect. NIR light penetrates tissues to a greater extent than other wavelengths and provides a means to indirectly initiate radical polymerization. Specifically, this heating coupled with a thermal initiator (VA-044) produced radicals that polymerized methacrylated hyaluronic acid (MeHA) and generated hydrogels. A range of VA-044 concentrations changed the gelation time, yielding a system stable at 37 ° C for 22 min that gels quickly (~3 min) when heated to 55 ° C. With a constant irradiation time (10 min) and laser power (0.3 W), different VA-044 and AuNR concentrations tuned the compressive modulus of the hydrogel. By changing the NIR irradiation time we attained a wide range of moduli at a set solution composition. In vivo mouse studies confirmed that NIR laser irradiation through tissue could gel an injected precursor solution transdermally.
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Affiliation(s)
- William M Gramlich
- Department of Bioengineering, University of Pennsylvania, 210 S 33rd St, Room 240 Skirkanich Hall, Philadelphia, PA 19104, USA
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1144
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Gattazzo F, Urciuolo A, Bonaldo P. Extracellular matrix: a dynamic microenvironment for stem cell niche. Biochim Biophys Acta Gen Subj 2014; 1840:2506-19. [PMID: 24418517 PMCID: PMC4081568 DOI: 10.1016/j.bbagen.2014.01.010] [Citation(s) in RCA: 849] [Impact Index Per Article: 84.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Revised: 01/05/2014] [Accepted: 01/06/2014] [Indexed: 02/08/2023]
Abstract
Background Extracellular matrix (ECM) is a dynamic and complex environment characterized by biophysical, mechanical and biochemical properties specific for each tissue and able to regulate cell behavior. Stem cells have a key role in the maintenance and regeneration of tissues and they are located in a specific microenvironment, defined as niche. Scope of review We overview the progresses that have been made in elucidating stem cell niches and discuss the mechanisms by which ECM affects stem cell behavior. We also summarize the current tools and experimental models for studying ECM–stem cell interactions. Major conclusions ECM represents an essential player in stem cell niche, since it can directly or indirectly modulate the maintenance, proliferation, self-renewal and differentiation of stem cells. Several ECM molecules play regulatory functions for different types of stem cells, and based on its molecular composition the ECM can be deposited and finely tuned for providing the most appropriate niche for stem cells in the various tissues. Engineered biomaterials able to mimic the in vivo characteristics of stem cell niche provide suitable in vitro tools for dissecting the different roles exerted by the ECM and its molecular components on stem cell behavior. General significance ECM is a key component of stem cell niches and is involved in various aspects of stem cell behavior, thus having a major impact on tissue homeostasis and regeneration under physiological and pathological conditions. This article is part of a Special Issue entitled Matrix-mediated cell behaviour and properties. Stem cells have a key role in the maintenance and regeneration of tissues. The extracellular matrix is a critical regulator of stem cell function. Stem cells reside in a dynamic and specialized microenvironment denoted as niche. The extracellular matrix represents an essential component of stem cell niches. Bioengineered niches can be used for investigating stem cell–matrix interactions.
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Affiliation(s)
- Francesca Gattazzo
- Department of Molecular Medicine, University of Padova, 35131 Padova, Italy
| | - Anna Urciuolo
- Department of Molecular Medicine, University of Padova, 35131 Padova, Italy.
| | - Paolo Bonaldo
- Department of Molecular Medicine, University of Padova, 35131 Padova, Italy.
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1145
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Thiele J, Ma Y, Bruekers SMC, Ma S, Huck WTS. 25th anniversary article: Designer hydrogels for cell cultures: a materials selection guide. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:125-47. [PMID: 24227691 DOI: 10.1002/adma.201302958] [Citation(s) in RCA: 290] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Revised: 07/31/2013] [Indexed: 05/25/2023]
Abstract
Cell culturing, whether for tissue engineering or cell biology studies, always involves placing cells in a non-natural environment and no material currently exist that can mimic the entire complexity of natural tissues and variety of cell-matrix interactions that is found in vivo. Here, we review the vast range of hydrogels, composed of natural or synthetic polymers that provide a route to tailored microenvironments.
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Affiliation(s)
- Julian Thiele
- Institute for Molecules and Materials, Heyendaalseweg 135, 6525, AJ, Nijmegen, The Netherlands
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1146
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Annabi N, Tamayol A, Uquillas JA, Akbari M, Bertassoni LE, Cha C, Camci-Unal G, Dokmeci MR, Peppas NA, Khademhosseini A. 25th anniversary article: Rational design and applications of hydrogels in regenerative medicine. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:85-123. [PMID: 24741694 PMCID: PMC3925010 DOI: 10.1002/adma.201303233] [Citation(s) in RCA: 851] [Impact Index Per Article: 85.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Hydrogels are hydrophilic polymer-based materials with high water content and physical characteristics that resemble the native extracellular matrix. Because of their remarkable properties, hydrogel systems are used for a wide range of biomedical applications, such as three-dimensional (3D) matrices for tissue engineering, drug-delivery vehicles, composite biomaterials, and as injectable fillers in minimally invasive surgeries. In addition, the rational design of hydrogels with controlled physical and biological properties can be used to modulate cellular functionality and tissue morphogenesis. Here, the development of advanced hydrogels with tunable physiochemical properties is highlighted, with particular emphasis on elastomeric, light-sensitive, composite, and shape-memory hydrogels. Emerging technologies developed over the past decade to control hydrogel architecture are also discussed and a number of potential applications and challenges in the utilization of hydrogels in regenerative medicine are reviewed. It is anticipated that the continued development of sophisticated hydrogels will result in clinical applications that will improve patient care and quality of life.
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Affiliation(s)
- Nasim Annabi
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02139, USA. Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, 02115, USA
| | - Ali Tamayol
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02139, USA. Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Jorge Alfredo Uquillas
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02139, USA. Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Mohsen Akbari
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02139, USA. Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, 02115, USA
| | - Luiz E. Bertassoni
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02139, USA. Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Chaenyung Cha
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02139, USA. Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Gulden Camci-Unal
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02139, USA. Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Mehmet R. Dokmeci
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02139, USA. Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Nicholas A. Peppas
- Department of Biomedical Engineering, Biomedical Engineering Building 3.110B, The University of Texas at Austin, 1 University Station, C0800, Austin, Texas, 78712–1062, USA
| | - Ali Khademhosseini
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02139, USA. Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, 02115, USA
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1147
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Yao MH, Yang J, Du MS, Song JT, Yu Y, Chen W, Zhao YD, Liu B. Polypeptide-engineered physical hydrogels designed from the coiled-coil region of cartilage oligomeric matrix protein for three-dimensional cell culture. J Mater Chem B 2014; 2:3123-3132. [DOI: 10.1039/c4tb00107a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A class of physical hydrogels photo-cross-linked from multi-branched photopolymeriized monomers based on the self-assembly of coiled-coil polypeptide P is developed.
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Affiliation(s)
- Ming-Hao Yao
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics – Hubei Bioinformatics & Molecular Imaging Key Laboratory
- Department of Biomedical Engineering
- College of Life Science and Technology
- Huazhong University of Science and Technology
- Wuhan 430074, P. R. China
| | - Jie Yang
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics – Hubei Bioinformatics & Molecular Imaging Key Laboratory
- Department of Biomedical Engineering
- College of Life Science and Technology
- Huazhong University of Science and Technology
- Wuhan 430074, P. R. China
| | - Ming-Shuo Du
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics – Hubei Bioinformatics & Molecular Imaging Key Laboratory
- Department of Biomedical Engineering
- College of Life Science and Technology
- Huazhong University of Science and Technology
- Wuhan 430074, P. R. China
| | - Ji-Tao Song
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics – Hubei Bioinformatics & Molecular Imaging Key Laboratory
- Department of Biomedical Engineering
- College of Life Science and Technology
- Huazhong University of Science and Technology
- Wuhan 430074, P. R. China
| | - Yong Yu
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics – Hubei Bioinformatics & Molecular Imaging Key Laboratory
- Department of Biomedical Engineering
- College of Life Science and Technology
- Huazhong University of Science and Technology
- Wuhan 430074, P. R. China
| | - Wei Chen
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics – Hubei Bioinformatics & Molecular Imaging Key Laboratory
- Department of Biomedical Engineering
- College of Life Science and Technology
- Huazhong University of Science and Technology
- Wuhan 430074, P. R. China
| | - Yuan-Di Zhao
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics – Hubei Bioinformatics & Molecular Imaging Key Laboratory
- Department of Biomedical Engineering
- College of Life Science and Technology
- Huazhong University of Science and Technology
- Wuhan 430074, P. R. China
| | - Bo Liu
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics – Hubei Bioinformatics & Molecular Imaging Key Laboratory
- Department of Biomedical Engineering
- College of Life Science and Technology
- Huazhong University of Science and Technology
- Wuhan 430074, P. R. China
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1148
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Safdar M, Sproß J, Jänis J. Microscale immobilized enzyme reactors in proteomics: Latest developments. J Chromatogr A 2014; 1324:1-10. [DOI: 10.1016/j.chroma.2013.11.045] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Revised: 11/18/2013] [Accepted: 11/24/2013] [Indexed: 01/10/2023]
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1149
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Greenwood-Goodwin M, Teasley ES, Heilshorn SC. Dual-stage growth factor release within 3D protein-engineered hydrogel niches promotes adipogenesis. Biomater Sci 2014; 2:1627-1639. [PMID: 25309741 DOI: 10.1039/c4bm00142g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Engineered biomimetic microenvironments from hydrogels are an emerging strategy to achieve lineage-specific differentiation in vitro. In addition to recapitulating critical matrix cues found in the native three-dimensional (3D) niche, the hydrogel can also be designed to deliver soluble factors that are present within the native inductive microenvironment. We demonstrate a versatile materials approach for the dual-stage delivery of multiple soluble factors within a 3D hydrogel to induce adipogenesis. We use a Mixing-Induced Two-Component Hydrogel (MITCH) embedded with alginate microgels to deliver two pro-adipogenic soluble factors, fibroblast growth factor 1 (FGF-1) and bone morphogenetic protein 4 (BMP-4) with two distinct delivery profiles. We show that dual-stage delivery of FGF-1 and BMP-4 to human adipose-derived stromal cells (hADSCs) significantly increases lipid accumulation compared with the simultaneous delivery of both growth factors together. Furthermore, dual-stage growth factor delivery within a 3D hydrogel resulted in substantially more lipid accumulation compared to identical delivery profiles in 2D cultures. Gene expression analysis shows upregulation of key adipogenic markers indicative of brown-like adipocytes. These data suggest that dual-stage release of FGF-1 and BMP-4 within 3D microenvironments can promote the in vitro development of mature adipocytes.
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Affiliation(s)
| | - Eric S Teasley
- Department of Bioengineering, Stanford University, Stanford, California 94305, United States
| | - Sarah C Heilshorn
- Department of Bioengineering, Stanford University, Stanford, California 94305, United States ; Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
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1150
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Gao L, Xu D, Zheng B. Construction of supramolecular organogels and hydrogels from crown ether based unsymmetric bolaamphiphiles. Chem Commun (Camb) 2014; 50:12142-5. [DOI: 10.1039/c4cc06048b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bolaamphiphilic low-molecular-weight gelators based on crown ethers, which could form organogels and hydrogels, were prepared.
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Affiliation(s)
- Lingyan Gao
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027, P. R. China
| | - Donghua Xu
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun, P. R. China
| | - Bo Zheng
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027, P. R. China
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