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Sun Y, Liu Y, Sun D, Liu K, Li Y, Liu Y, Zhang S. A facile single-cell patterning strategy based on harbor-like microwell microfluidics. Biomed Mater 2024; 19:045018. [PMID: 38772387 DOI: 10.1088/1748-605x/ad4e83] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Accepted: 05/21/2024] [Indexed: 05/23/2024]
Abstract
Single-cell analysis is an effective method for conducting comprehensive heterogeneity studies ranging from cell phenotype to gene expression. The ability to arrange different cells in a predetermined pattern at single-cell resolution has a wide range of applications in cell-based analysis and plays an important role in facilitating interdisciplinary research by researchers in various fields. Most existing microfluidic microwell chips is a simple and straightforward method, which typically use small-sized microwells to accommodate single cells. However, this method imposes certain limitations on cells of various sizes, and the single-cell capture efficiency is relatively low without the assistance of external forces. Moreover, the microwells limit the spatiotemporal resolution of reagent replacement, as well as cell-to-cell communication. In this study, we propose a new strategy to prepare a single-cell array on a planar microchannel based on microfluidic flip microwells chip platform with large apertures (50 μm), shallow channels (50 μm), and deep microwells (50 μm). The combination of three configuration characteristics contributes to multi-cell trapping and a single-cell array within microwells, while the subsequent chip flipping accomplishes the transfer of the single-cell array to the opposite planar microchannel for cells adherence and growth. Further assisted by protein coating of bovine serum albumin and fibronectin on different layers, the single-cell capture efficiency in microwells is achieved at 92.1% ± 1%, while ultimately 85% ± 3.4% on planar microchannel. To verify the microfluidic flip microwells chip platform, the real-time and heterogeneous study of calcium release and apoptosis behaviours of single cells is carried out. To our knowledge, this is the first time that high-efficiency single-cell acquisition has been accomplished using a circular-well chip design that combines shallow channel, large aperture and deep microwell together. The chip is effective in avoiding the shearing force of high flow rates on cells, and the large apertures better allows cells to sedimentation. Therefore, this strategy owns the advantages of easy preparation and user-friendliness, which is especially valuable for researchers from different fields.
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Affiliation(s)
- Yingnan Sun
- Shandong Province Key Laboratory of Detection Technology for Tumor Makers, School of Medicine, Linyi University, Linyi 276005, People's Republic of China
| | - Yongshu Liu
- Shandong Province Key Laboratory of Detection Technology for Tumor Makers, School of Medicine, Linyi University, Linyi 276005, People's Republic of China
| | - Dezhi Sun
- Xinjiang Key Laboratory of Signal Detection and Processing, School of Computer Science and Technology, Xinjiang University, Urumqi 830046, People's Republic of China
| | - Kexin Liu
- Shandong Province Key Laboratory of Detection Technology for Tumor Makers, School of Medicine, Linyi University, Linyi 276005, People's Republic of China
| | - Yuyan Li
- Shandong Province Key Laboratory of Detection Technology for Tumor Makers, School of Medicine, Linyi University, Linyi 276005, People's Republic of China
| | - Yumin Liu
- Shandong Province Key Laboratory of Detection Technology for Tumor Makers, School of Medicine, Linyi University, Linyi 276005, People's Republic of China
| | - Shusheng Zhang
- Shandong Province Key Laboratory of Detection Technology for Tumor Makers, School of Medicine, Linyi University, Linyi 276005, People's Republic of China
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2
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Tian Q, Xing K, Liu Y, Wang Q, Sun H, Sun YN, Zhang S. Protocol for high-throughput single-cell patterning using a reusable ultrathin metal microstencil. STAR Protoc 2023; 4:102115. [PMID: 36853712 PMCID: PMC9947415 DOI: 10.1016/j.xpro.2023.102115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 12/02/2022] [Accepted: 01/25/2023] [Indexed: 02/13/2023] Open
Abstract
Exploiting convenient strategies for single-cell preparation while maintaining a high throughput remains challenging. This protocol describes a simple workflow for high-throughput single-cell patterning using a reusable ultrathin metal microstencil (UTmS). We describe UTmS-chip design, fabrication, and quality characterization. We then detail the preparation of flat substrates and chip assembly for single-cell patterning, followed by culturing of cells on a chip. Finally, we describe the evaluation of single-cell patterning and the downstream applications for studying single-cell calcium release and apoptosis. For complete details on the use and execution of this protocol, please refer to Song et al. (2021).1.
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Affiliation(s)
- Qingqing Tian
- Shandong Province Key Laboratory of Detection Technology for Tumor Makers, School of Medicine, Linyi University, Linyi, Shandong 276005, China
| | - Kunming Xing
- Linyi People's Hospital, Linyi, Shandong 276100, P. R. China
| | - Yongshu Liu
- Shandong Province Key Laboratory of Detection Technology for Tumor Makers, School of Medicine, Linyi University, Linyi, Shandong 276005, China
| | - Qian Wang
- Shandong Province Key Laboratory of Detection Technology for Tumor Makers, School of Medicine, Linyi University, Linyi, Shandong 276005, China
| | - Haonan Sun
- Shandong Province Key Laboratory of Detection Technology for Tumor Makers, School of Medicine, Linyi University, Linyi, Shandong 276005, China
| | - Ying-Nan Sun
- Shandong Province Key Laboratory of Detection Technology for Tumor Makers, School of Medicine, Linyi University, Linyi, Shandong 276005, China.
| | - Shusheng Zhang
- Shandong Province Key Laboratory of Detection Technology for Tumor Makers, School of Medicine, Linyi University, Linyi, Shandong 276005, China.
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3
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Itri S, del Giudice D, Mugnano M, Tkachenko V, Uusitalo S, Kokkonen A, Päkkilä I, Ottevaere H, Nie Y, Mazzon E, Gugliandolo A, Ferraro P, Grilli S. A pin-based pyro-electrohydrodynamic jet sensor for tuning the accumulation of biomolecules down to sub-picogram level detection. SENSING AND BIO-SENSING RESEARCH 2022. [DOI: 10.1016/j.sbsr.2022.100536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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4
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Song Y, Tian Q, Liu J, Guo W, Sun Y, Zhang S. A reusable single-cell patterning strategy based on an ultrathin metal microstencil. LAB ON A CHIP 2021; 21:1590-1597. [PMID: 33656024 DOI: 10.1039/d0lc01175d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The ability to arrange distinct cells in specific, predefined patterns at single-cell resolution can have broad applications in cell-based assays and play an important role in facilitating interdisciplinary research for researchers in various fields. However, most existing methods for single-cell patterning are based on the complicated lithography-based microfabrication process, and require professional skills. Thus, exploiting convenient and universal strategies of single-cell preparation while maintaining high-throughput single-cell patterning remains a challenge. Here, we describe a simple approach for rapid and high-efficiency single-cell patterning using an ultrathin metal microstencil (UTmS) and common tools available in any laboratory. In this work, ultrathin steel microstencil plates with only 5 μm thickness could be fabricated with laser drilling and achieve single-cell prototyping on an arbitrary planar substrate under gravity-induced natural sedimentation without requiring additional fixation, reaction pools, and centrifugation procedures. In this method, the UTmS is reusable and single-cell occupancy could easily reach approximately 88% within 30 min on fibronectin-modified substrates under gravity-induced natural sedimentation, and no significant effect on cell viability was observed. To verify this method, the real-time and heterogeneous study of calcium release and apoptosis behaviors of single cells was carried out based on this new strategy. To our knowledge, it is the first time that a UTmS with 5 μm thickness is directly applied to facilitate the micropatterning of high-resolution single cells, which is valuable for researchers in different fields owing to its user-friendly operation.
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Affiliation(s)
- Yuhan Song
- Collaborative Innovation Center of Tumor Marker Detection Technology, Equipment and Diagnosis-Therapy Integration in Universities of Shandong, Shandong Province Key Laboratory of Detection Technology for Tumor Makers, School of Chemistry and Chemical Engineering, Linyi University, Linyi, 276005, China.
| | - Qingqing Tian
- Collaborative Innovation Center of Tumor Marker Detection Technology, Equipment and Diagnosis-Therapy Integration in Universities of Shandong, Shandong Province Key Laboratory of Detection Technology for Tumor Makers, School of Chemistry and Chemical Engineering, Linyi University, Linyi, 276005, China.
| | - Jianhong Liu
- Collaborative Innovation Center of Tumor Marker Detection Technology, Equipment and Diagnosis-Therapy Integration in Universities of Shandong, Shandong Province Key Laboratory of Detection Technology for Tumor Makers, School of Chemistry and Chemical Engineering, Linyi University, Linyi, 276005, China.
| | - Wenting Guo
- Collaborative Innovation Center of Tumor Marker Detection Technology, Equipment and Diagnosis-Therapy Integration in Universities of Shandong, Shandong Province Key Laboratory of Detection Technology for Tumor Makers, School of Chemistry and Chemical Engineering, Linyi University, Linyi, 276005, China.
| | - Yingnan Sun
- Collaborative Innovation Center of Tumor Marker Detection Technology, Equipment and Diagnosis-Therapy Integration in Universities of Shandong, Shandong Province Key Laboratory of Detection Technology for Tumor Makers, School of Chemistry and Chemical Engineering, Linyi University, Linyi, 276005, China.
| | - Shusheng Zhang
- Collaborative Innovation Center of Tumor Marker Detection Technology, Equipment and Diagnosis-Therapy Integration in Universities of Shandong, Shandong Province Key Laboratory of Detection Technology for Tumor Makers, School of Chemistry and Chemical Engineering, Linyi University, Linyi, 276005, China.
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5
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Rega R, Mugnano M, Oleandro E, Tkachenko V, del Giudice D, Bagnato G, Ferraro P, Grilli S, Gangemi S. Detecting Collagen Molecules at Picogram Level through Electric Field-Induced Accumulation. SENSORS (BASEL, SWITZERLAND) 2020; 20:E3567. [PMID: 32599740 PMCID: PMC7349194 DOI: 10.3390/s20123567] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 06/19/2020] [Accepted: 06/22/2020] [Indexed: 12/24/2022]
Abstract
The demand for sensors capable of measuring low-abundant collagen in human fluids has highly increased in recent years. Indeed, collagen is expected to be a biomarker for chronic diseases and could monitor their progression. Here we show detection of highly diluted samples of collagen at picogram level thanks to an innovative pyro-electrohydrodynamic jet (p-jet) system. Through the intense electric fields generated by the pyroelectric effect in a ferroelectric crystal, the collagen solution was concentrated on a small area of a slide that was appropriately functionalized to bind proteins. The collagen molecules were labeled by an appropriate fluorophore to show how the number of tiny droplets influences the limit of detection of the technique. The results show that the p-jet is extremely promising for overcoming the current detection limits of collagen-based products in human fluids, performing 10 times better than the enzyme-linked immunosorbent assay (ELISA) and thus paving the way for the early diagnosis of related chronic diseases.
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Affiliation(s)
- Romina Rega
- Department of Physical Science and Technology of Matter, Institute of Applied Sciences and Intelligent Systems (ISASI), National Research Council of Italy (CNR), 80078 Pozzuoli (NA), Italy; (M.M.); (E.O.); (V.T.); (D.d.G.); (P.F.); (S.G.)
| | - Martina Mugnano
- Department of Physical Science and Technology of Matter, Institute of Applied Sciences and Intelligent Systems (ISASI), National Research Council of Italy (CNR), 80078 Pozzuoli (NA), Italy; (M.M.); (E.O.); (V.T.); (D.d.G.); (P.F.); (S.G.)
| | - Emilia Oleandro
- Department of Physical Science and Technology of Matter, Institute of Applied Sciences and Intelligent Systems (ISASI), National Research Council of Italy (CNR), 80078 Pozzuoli (NA), Italy; (M.M.); (E.O.); (V.T.); (D.d.G.); (P.F.); (S.G.)
- Department of Mathematics and Physics, University of Campania, 81100 Caserta, Italy
| | - Volodymyr Tkachenko
- Department of Physical Science and Technology of Matter, Institute of Applied Sciences and Intelligent Systems (ISASI), National Research Council of Italy (CNR), 80078 Pozzuoli (NA), Italy; (M.M.); (E.O.); (V.T.); (D.d.G.); (P.F.); (S.G.)
| | - Danila del Giudice
- Department of Physical Science and Technology of Matter, Institute of Applied Sciences and Intelligent Systems (ISASI), National Research Council of Italy (CNR), 80078 Pozzuoli (NA), Italy; (M.M.); (E.O.); (V.T.); (D.d.G.); (P.F.); (S.G.)
- Department of Mathematics and Physics, University of Campania, 81100 Caserta, Italy
| | - Gianluca Bagnato
- Division of Pneumology, Papardo Hospital, Contrada Papardo, 98122 Messina, Italy;
| | - Pietro Ferraro
- Department of Physical Science and Technology of Matter, Institute of Applied Sciences and Intelligent Systems (ISASI), National Research Council of Italy (CNR), 80078 Pozzuoli (NA), Italy; (M.M.); (E.O.); (V.T.); (D.d.G.); (P.F.); (S.G.)
| | - Simonetta Grilli
- Department of Physical Science and Technology of Matter, Institute of Applied Sciences and Intelligent Systems (ISASI), National Research Council of Italy (CNR), 80078 Pozzuoli (NA), Italy; (M.M.); (E.O.); (V.T.); (D.d.G.); (P.F.); (S.G.)
| | - Sebastiano Gangemi
- School and Operative Unit of Allergy and Clinical Immunology, Department of Clinical and Experimental Medicine, University of Messina, 98122 Messina, Italy;
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6
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Rega R, Gennari O, Mecozzi L, Pagliarulo V, Mugnano M, Oleandro E, Nazzaro F, Ferraro P, Grilli S. Pyro-Electrification of Freestanding Polymer Sheets: A New Tool for Cation-Free Manipulation of Cell Adhesion in vitro. Front Chem 2019; 7:429. [PMID: 31275921 PMCID: PMC6594357 DOI: 10.3389/fchem.2019.00429] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 05/27/2019] [Indexed: 12/15/2022] Open
Abstract
Localized electric fields have become, in recent years, a source of inspiration to researchers and laboratories thanks to a huge amount of applications derived from it, including positioning of microparticles as building blocks for electrical, optical, and magnetic devices. The possibility of producing polymeric materials with surface charge thus opens new perspectives for applications where process simplicity and cost-effectiveness of flexible electronics are of fundamental importance. In particular, the influence of surface charges is widely studied and is a critical issue especially when new materials and functional technologies are introduced. Here, we report a voltage-free pyro-electrification (PE) process able to induce a permanent dipole orientation into polymer sheets under both mono- and bipolar distribution. The technique makes use of the pyroelectric effect for generating electric potentials on the order of kilovolts by an easy-to-accomplish thermal treatment of ferroelectric lithium niobate (LN) crystals. The PE allows us to avoid the expensive and time-consuming fabrication of high-power electrical circuits, as occurs in traditional generator-based techniques. Since the technique is fully compatible with spin-coating-based procedures, the pyro-electrified polymer sheets are easily peeled off the surface of the LN crystal after PE completion, thus providing highly stable and freestanding charged sheets. We show the reliability of the technique for different polymers and for different applications ranging from live cell patterning to biofilm formation tests for bacteria linked to food-processing environments.
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Affiliation(s)
- Romina Rega
- Institute of Applied Sciences and Intelligent Systems, National Research Council (CNR-ISASI), Pozzuoli, Italy
| | - Oriella Gennari
- Institute of Applied Sciences and Intelligent Systems, National Research Council (CNR-ISASI), Pozzuoli, Italy
| | - Laura Mecozzi
- Institute of Applied Sciences and Intelligent Systems, National Research Council (CNR-ISASI), Pozzuoli, Italy
| | - Vito Pagliarulo
- Institute of Applied Sciences and Intelligent Systems, National Research Council (CNR-ISASI), Pozzuoli, Italy
| | - Martina Mugnano
- Institute of Applied Sciences and Intelligent Systems, National Research Council (CNR-ISASI), Pozzuoli, Italy
| | - Emilia Oleandro
- Institute of Applied Sciences and Intelligent Systems, National Research Council (CNR-ISASI), Pozzuoli, Italy
- Department of Mathematics and Physics, University of Campania “L. Vanvitelli”, Caserta, Italy
| | - Filomena Nazzaro
- Institute of Food Sciences, National Research Council (CNR-ISA), Avellino, Italy
| | - Pietro Ferraro
- Institute of Applied Sciences and Intelligent Systems, National Research Council (CNR-ISASI), Pozzuoli, Italy
| | - Simonetta Grilli
- Institute of Applied Sciences and Intelligent Systems, National Research Council (CNR-ISASI), Pozzuoli, Italy
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7
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Sun Y, Song W, Sun X, Zhang S. Inkjet-Printing Patterned Chip on Sticky Superhydrophobic Surface for High-Efficiency Single-Cell Array Trapping and Real-Time Observation of Cellular Apoptosis. ACS APPLIED MATERIALS & INTERFACES 2018; 10:31054-31060. [PMID: 30148358 DOI: 10.1021/acsami.8b10703] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Single-cell assays have broad applications in cellular studies, tissue engineering, fundamental studies of cell-cell interactions, and understanding of cell-to-cell variations. Most existing methods for micron-sized cell patterning are still based on lithography-based microfabrication process. Thus, exploiting new mask-free strategies while maintaining high-precision single-cell patterning is still a great challenge. Here, we presented a facile, low-cost, and mask-free approach for constructing high-resolution patterning on sticky superhydrophobic (SH) substrates based on inkjet printing with ordinary precision. In this work, the SH surface with both high contact angle and relatively high contact angle hysteresis can not only obtain high-resolution spots but also avoid droplets bouncing behavior. We improved the feature size of printed protein spots as small as 4 μm, which is much smaller than protein spots used for single-cell trapping. Moreover, with the assistance of a narrow microchannel, the inkjet-printing patterned chip with fibronectin ink allows for fast and high-efficiency trapping of multiple single-cell arrays. Using this method, single-cell occupancy could reach approximately 81% within 30 min on subcellular-sized patterning chip, and there was no significant effect on cell viability. As a proof of concept, this chip has been applied to study the real-time apoptosis of single cells and demonstrated the potential in cells' heterogeneity analysis.
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Affiliation(s)
- Yingnan Sun
- Shandong Provincial Key Laboratory of Detection Technology for Tumor Makers, College of Chemistry and Chemical Engineering , Linyi University , Linyi , Shandong 276005 , P. R. China
| | - Wenhua Song
- Shandong Provincial Key Laboratory of Detection Technology for Tumor Makers, College of Chemistry and Chemical Engineering , Linyi University , Linyi , Shandong 276005 , P. R. China
| | - Xiaohan Sun
- Shandong Provincial Key Laboratory of Detection Technology for Tumor Makers, College of Chemistry and Chemical Engineering , Linyi University , Linyi , Shandong 276005 , P. R. China
| | - Shusheng Zhang
- Shandong Provincial Key Laboratory of Detection Technology for Tumor Makers, College of Chemistry and Chemical Engineering , Linyi University , Linyi , Shandong 276005 , P. R. China
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8
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Mecozzi L, Gennari O, Coppola S, Olivieri F, Rega R, Mandracchia B, Vespini V, Bramanti A, Ferraro P, Grilli S. Easy Printing of High Viscous Microdots by Spontaneous Breakup of Thin Fibers. ACS APPLIED MATERIALS & INTERFACES 2018; 10:2122-2129. [PMID: 29278322 DOI: 10.1021/acsami.7b17358] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Electrohydrodynamic jetting is emerging as a successful technique for printing inks with resolutions well beyond those offered by conventional inkjet printers. However, the variety of printable inks is still limited to those with relatively low viscosities (typically <20 mPa s) due to nozzle clogging problems. Here, we show the possibility of printing ordered microdots of high viscous inks such as poly(lactic-co-glycolic acid) (PLGA) by exploiting the spontaneous breakup of a thin fiber generated through nozzle-free pyro-electrospinning. The PLGA fiber is deposited onto a partially wetting surface, and the breakup is achieved simply by applying an appropriate thermal stimulation, which is able to induce polymer melting and hence a mechanism of surface area minimization due to the Plateau-Rayleigh instability. The results show that this technique is a good candidate for extending the printability at the microscale to high viscous inks, thus extending their applicability to additional applications, such as cell behavior under controlled morphological constraints.
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Affiliation(s)
- L Mecozzi
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - O Gennari
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - S Coppola
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - F Olivieri
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
- Department of Chemical Materials and Production Engineering of the University "Federico II" , P.le Tecchio 80, 80125 Naples, Italy
| | - R Rega
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - B Mandracchia
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - V Vespini
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - A Bramanti
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - P Ferraro
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
| | - S Grilli
- Institute of Applied Sciences & Intelligent Systems of the National Research Council (CNR-ISASI) , Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
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He J, Zhao X, Chang J, Li D. Microscale Electro-Hydrodynamic Cell Printing with High Viability. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13. [PMID: 29094473 DOI: 10.1002/smll.201702626] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Revised: 08/31/2017] [Indexed: 05/11/2023]
Abstract
Cell printing has gained extensive attentions for the controlled fabrication of living cellular constructs in vitro. Various cell printing techniques are now being explored and developed for improved cell viability and printing resolution. Here an electro-hydrodynamic cell printing strategy is developed with microscale resolution (<100 µm) and high cellular viability (>95%). Unlike the existing electro-hydrodynamic cell jetting or printing explorations, insulating substrate is used to replace conventional semiconductive substrate as the collecting surface which significantly reduces the electrical current in the electro-hydrodynamic printing process from milliamperes (>0.5 mA) to microamperes (<10 µA). Additionally, the nozzle-to-collector distance is fixed as small as 100 µm for better control over filament deposition. These features ensure high cellular viability and normal postproliferative capability of the electro-hydrodynamically printed cells. The smallest width of the electro-hydrodynamically printed hydrogel filament is 82.4 ± 14.3 µm by optimizing process parameters. Multiple hydrogels or multilayer cell-laden constructs can be flexibly printed under cell-friendly conditions. The printed cells in multilayer hydrogels kept alive and gradually spread during 7-days culture in vitro. This exploration offers a novel and promising cell printing strategy which might benefit future biomedical innovations such as microscale tissue engineering, organ-on-a-chip systems, and nanomedicine.
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Affiliation(s)
- Jiankang He
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China
| | - Xiang Zhao
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China
| | - Jinke Chang
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China
| | - Dichen Li
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China
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10
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Martinez-Rivas A, González-Quijano GK, Proa-Coronado S, Séverac C, Dague E. Methods of Micropatterning and Manipulation of Cells for Biomedical Applications. MICROMACHINES 2017; 8:E347. [PMID: 30400538 PMCID: PMC6187909 DOI: 10.3390/mi8120347] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 11/27/2017] [Accepted: 11/28/2017] [Indexed: 12/12/2022]
Abstract
Micropatterning and manipulation of mammalian and bacterial cells are important in biomedical studies to perform in vitro assays and to evaluate biochemical processes accurately, establishing the basis for implementing biomedical microelectromechanical systems (bioMEMS), point-of-care (POC) devices, or organs-on-chips (OOC), which impact on neurological, oncological, dermatologic, or tissue engineering issues as part of personalized medicine. Cell patterning represents a crucial step in fundamental and applied biological studies in vitro, hence today there are a myriad of materials and techniques that allow one to immobilize and manipulate cells, imitating the 3D in vivo milieu. This review focuses on current physical cell patterning, plus chemical and a combination of them both that utilizes different materials and cutting-edge micro-nanofabrication methodologies.
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Affiliation(s)
- Adrian Martinez-Rivas
- CIC, Instituto Politécnico Nacional (IPN), Av. Juan de Dios Bátiz S/N, Nueva Industrial Vallejo, 07738 Mexico City, Mexico.
| | - Génesis K González-Quijano
- CONACYT-CNMN, Instituto Politécnico Nacional (IPN), Av. Luis Enrique Erro s/n, Nueva Industrial Vallejo, 07738 Mexico City, Mexico.
| | - Sergio Proa-Coronado
- ENCB, Instituto Politécnico Nacional (IPN), Av. Wilfrido Massieu, Unidad Adolfo López Mateos, 07738 Mexico City, Mexico.
| | | | - Etienne Dague
- LAAS-CNRS, Université de Toulouse, CNRS, Toulouse, France.
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11
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Influences of Excitation on Dynamic Characteristics of Piezoelectric Micro-Jets. MICROMACHINES 2017; 8:mi8070213. [PMID: 30400404 PMCID: PMC6190458 DOI: 10.3390/mi8070213] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 06/14/2017] [Accepted: 06/30/2017] [Indexed: 11/24/2022]
Abstract
Piezoelectric micro-jets are based on piezoelectric ink-jet technology and can achieve the drop-on demand requirements. A piezoelectric micro-jet which is designed for bearing lubrication is presented in this paper. In order to analyze the fluid dynamic characteristics of the piezoelectric micro-jet so as to obtain good injection performance, a direct coupling simulation method is proposed in this paper. The effects of inlet and viscous losses in the cavity are taken into account, which are close to the actual conditions in the direct coupling method. The effects of the pulse excitation parameters on the pinch-off time, tail length, velocity, and volume of the droplet are analyzed by the proposed direct coupling method. The pressure distribution inside the cavity of the micro-jet and the status of the droplet formation at different times are also given. In addition, the method is proved to be effective in predicting and analyzing the fluid dynamic characteristics of piezoelectric micro-jets by comparing the simulation results with the experimental results.
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