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Worden A, Uline MJ, Shazly T, Stern M, Potts JD. Self-Assembling Toroidal Cell Constructs for Tissue Engineering Applications. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2022; 28:1-10. [PMID: 35232524 DOI: 10.1017/s1431927622000253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Developing tissues have intricate, three-dimensional (3D) organizations of cells and extracellular matrix (ECM) that provide the framework necessary to meet morphogenic and necessary demands. Migrating cells, in vivo, are exposed to numerous conflicting signals: chemokines, ECM, growth factors, and physical forces. While most of these have been studied individually in vivo or in vitro, our understanding of how cells integrate these various signals is lacking. We previously developed a novel self-organizing cellularized collagen hydrogel model that is adaptable, tunable, reproducible, and capable of mimicking the multitude of stimuli that cells experience. Our model produced self-assembled toroids of cells that were formed by 24 h. Data we present here show toroids initially form as early as 3 h after seeding. Additionally, toroids formed when cells were seeded on various collagen subtypes and were sensitive to the composition of the hydrogel. Moreover, we found differences in remodeling in toroid gels compared to gels with cells embedded in them using both a collagen binding peptide and rheology. Using scanning electron microscopy, we observed toroids forming a crater-like structure compared to whole gel contractions in mixed in gels. Finally, when multiple cells were mixed prior to seeding, heterogeneous toroids formed with some containing clusters of cells.
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Affiliation(s)
- Austin Worden
- Department of Cell Biology and Anatomy, University of South Carolina, School of Medicine, Columbia, SC29209, USA
| | - Mark J Uline
- Biomedical Engineering Program, University of South Carolina, Columbia, SC29208, USA
- Chemical Engineering Department, University of South Carolina, Columbia, SC29208, USA
| | - Tarek Shazly
- Biomedical Engineering Program, University of South Carolina, Columbia, SC29208, USA
- Mechanical Engineering Department, University of South Carolina, Columbia, SC29208, USA
| | - Matt Stern
- Biology Department, Winthrop University, Rock Hill, SC29733, USA
| | - Jay D Potts
- Department of Cell Biology and Anatomy, University of South Carolina, School of Medicine, Columbia, SC29209, USA
- Biomedical Engineering Program, University of South Carolina, Columbia, SC29208, USA
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Ye F, Jiang J, Chang H, Xie L, Deng J, Ma Z, Yuan W. Improved single-cell culture achieved using micromolding in capillaries technology coupled with poly (HEMA). BIOMICROFLUIDICS 2015; 9:044106. [PMID: 26339307 PMCID: PMC4514715 DOI: 10.1063/1.4926807] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Accepted: 07/02/2015] [Indexed: 05/16/2023]
Abstract
Cell studies at the single-cell level are becoming more and more critical for understanding the complex biological processes. Here, we present an optimization study investigating the positioning of single cells using micromolding in capillaries technology coupled with the cytophobic biomaterial poly (2-hydroxyethyl methacrylate) (poly (HEMA)). As a cytophobic biomaterial, poly (HEMA) was used to inhibit cells, whereas the glass was used as the substrate to provide a cell adhesive background. The poly (HEMA) chemical barrier was obtained using micromolding in capillaries, and the microchannel networks used for capillarity were easily achieved by reversibly bonding the polydimethylsiloxane mold and the glass. Finally, discrete cell adhesion regions were presented on the glass surface. This method is facile and low cost, and the reagents are commercially available. We validated the cytophobic abilities of the poly (HEMA), optimized the channel parameters for higher quality and more stable poly (HEMA) patterns by investigating the effects of changing the aspect ratio and the width of the microchannel on the poly (HEMA) grid pattern, and improved the single-cell occupancy by optimizing the dimensions of the cell adhesion regions.
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Affiliation(s)
- Fang Ye
- Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and School of Mechanical Engineering, Northwestern Polytechnical University , Xi'an 710072, People's Republic of China
| | - Jin Jiang
- Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and School of Mechanical Engineering, Northwestern Polytechnical University , Xi'an 710072, People's Republic of China
| | - Honglong Chang
- Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and School of Mechanical Engineering, Northwestern Polytechnical University , Xi'an 710072, People's Republic of China
| | - Li Xie
- Key Laboratory of Space Bioscience and Biotechnology, Institute of Special Environmental Biophysics, School of Life Sciences, Northwestern Polytechnical University , Xi'an 710072, People's Republic of China
| | - Jinjun Deng
- Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and School of Mechanical Engineering, Northwestern Polytechnical University , Xi'an 710072, People's Republic of China
| | - Zhibo Ma
- Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and School of Mechanical Engineering, Northwestern Polytechnical University , Xi'an 710072, People's Republic of China
| | - Weizheng Yuan
- Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and School of Mechanical Engineering, Northwestern Polytechnical University , Xi'an 710072, People's Republic of China
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Polyelectrolyte Multilayers in Microfluidic Systems for Biological Applications. Polymers (Basel) 2014. [DOI: 10.3390/polym6082100] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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Generation of uniform agarose microwells for cell patterning by micromolding in capillaries. Macromol Res 2013. [DOI: 10.1007/s13233-013-1048-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Flickinger ST, Copeland MF, Downes EM, Braasch AT, Tuson HH, Eun YJ, Weibel DB. Quorum sensing between Pseudomonas aeruginosa biofilms accelerates cell growth. J Am Chem Soc 2011; 133:5966-75. [PMID: 21434644 DOI: 10.1021/ja111131f] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This manuscript describes the fabrication of arrays of spatially confined chambers embossed in a layer of poly(ethylene glycol) diacrylate (PEGDA) and their application to studying quorum sensing between communities of Pseudomonas aeruginosa. We hypothesized that biofilms may produce stable chemical signaling gradients in close proximity to surfaces, which influence the growth and development of nearby microcolonies into biofilms. To test this hypothesis, we embossed a layer of PEGDA with 1.5-mm wide chambers in which P. aeruginosa biofilms grew, secreted homoserine lactones (HSLs, small molecule regulators of quorum sensing), and formed spatial and temporal gradients of these compounds. In static growth conditions (i.e., no flow), nascent biofilms secreted N-(3-oxododecanoyl) HSL that formed a gradient in the hydrogel and was detected by P. aeruginosa cells that were ≤8 mm away. Diffusing HSLs increased the growth rate of cells in communities that were <3 mm away from the biofilm, where the concentration of HSL was >1 μM, and had little effect on communities farther away. The HSL gradient had no observable influence on biofilm structure. Surprisingly, 0.1-10 μM of N-(3-oxododecanoyl) HSL had no effect on cell growth in liquid culture. The results suggest that the secretion of HSLs from a biofilm enhances the growth of neighboring cells in contact with surfaces into communities and may influence their composition, organization, and diversity.
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Affiliation(s)
- Shane T Flickinger
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
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Abstract
The technique of selective immobilization of biomolecules in defined positions or areas using a simple procedure is essential for various applications such as biosensors, biochips, biomedical microdevices, and tissue engineering. For the generation of biomolecule microarrays, it is necessary to develop a functional surface retaining protein functionality and cell viability, and an efficient patterning tool having flexibility of size and shape. In this chapter, we have presented the simple tools of protein and cell microarray based on functionalized surface such as a spotting method with improvement of protein functionality, a functionalized silicon-based surface using photolithography, and an orthogonally polyelectrolyte-coated surface based on soft-lithography.
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Affiliation(s)
- Yoo Seong Choi
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Korea
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Jeong HH, Lee JH, Lee CS, Jang H, Yang YH, Kim YH, Huh KM. Fabrication of selective anti-biofouling surface for micro/nanopatterning of proteins. Macromol Res 2010. [DOI: 10.1007/s13233-010-0903-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Choi CH, Lee JH, Hwang TS, Lee CS, Kim YG, Yang YH, Huh KM. Preparation of bacteria microarray using selective patterning of polyelectrolyte multilayer and poly(ethylene glycol)-poly(lactide) diblock copolymer. Macromol Res 2010. [DOI: 10.1007/s13233-010-0314-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Lai Y, Huang Y, Wang H, Huang J, Chen Z, Lin C. Selective formation of ordered arrays of octacalcium phosphate ribbons on TiO2 nanotube surface by template-assisted electrodeposition. Colloids Surf B Biointerfaces 2010; 76:117-22. [DOI: 10.1016/j.colsurfb.2009.10.023] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2009] [Revised: 10/05/2009] [Accepted: 10/13/2009] [Indexed: 11/25/2022]
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