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Li S, Yoshioka M, Li J, Liu L, Ye S, Kamei KI, Chen Y. Nanocasting of fibrous morphology on a substrate for long-term propagation of human induced pluripotent stem cells. Biomed Mater 2022; 17. [PMID: 35114658 DOI: 10.1088/1748-605x/ac51b8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 02/03/2022] [Indexed: 11/12/2022]
Abstract
Human-induced pluripotent stem cells (hiPSCs) can be self-renewed for many generations on nanofibrous substrates. Herein, a casting method is developed to replicate the nanofibrous morphology into a thin layer of polymethylsiloxane (PDMS). The template is obtained by electrospinning and chemical crosslinking of gelatin nanofibers on a glass slide. The replicas of the template are surface-functionalized by gelatin and used for propagation of hiPSCs over tenth generations. The performance of the propagated hiPSCs is checked by immunofluorescence imaging, flowcytometry, and RT-PCR, confirming the utility of the method. The results are also compared with those obtained using electrospun nanofiber substrates. Inherently, the PDMS replicas is of low stiffness and can be reproduced easily. Compared to other patterning techniques, casting is more flexible and cost-effective, suggesting that this method might find applications in cell-based assays that rely on stringent consideration of both substrate stiffness and surface morphology.
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Affiliation(s)
- Sisi Li
- Chemistry, Ecole Normale Superieure, 24 rue Lhomond, Paris, Île-de-France, 75230, FRANCE
| | - Momoko Yoshioka
- Kyoto University, Yoshida Ushinomiya-cho, Kyoto, 606-8501, JAPAN
| | - Junjun Li
- Institute for Integrated Cell-Material Sciences, Yoshida Ushinomiya-cho, Kyoto, 606-8501, JAPAN
| | - Li Liu
- Kyoto University, Yoshida Ushinomiya-cho, Kyoto, 606-8501, JAPAN
| | - Sixin Ye
- University of Paris, 94276 Le Kremlin Bicêtre, Paris, 75006, FRANCE
| | - Ken-Ichiro Kamei
- Institute for Integrated Cell-Material Sciences, Yoshida Ushinomiya-cho, Kyoto, 606-8501, JAPAN
| | - Yong Chen
- Chemistry, Ecole Normale Superieure, 24 rue Lhomond, F-75231 Paris Cedex 05, Paris, Île-de-France, 75230, FRANCE
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Vollertsen AR, Den SAT, Schwach V, van den Berg A, Passier R, van der Meer AD, Odijk M. Highly parallelized human embryonic stem cell differentiation to cardiac mesoderm in nanoliter chambers on a microfluidic chip. Biomed Microdevices 2021; 23:30. [PMID: 34059973 PMCID: PMC8166733 DOI: 10.1007/s10544-021-00556-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/24/2021] [Indexed: 12/16/2022]
Abstract
Human stem cell-derived cells and tissues hold considerable potential for applications in regenerative medicine, disease modeling and drug discovery. The generation, culture and differentiation of stem cells in low-volume, automated and parallelized microfluidic chips hold great promise to accelerate the research in this domain. Here, we show that we can differentiate human embryonic stem cells (hESCs) to early cardiac mesodermal cells in microfluidic chambers that have a volume of only 30 nanoliters, using discontinuous medium perfusion. 64 of these chambers were parallelized on a chip which contained integrated valves to spatiotemporally isolate the chambers and automate cell culture medium exchanges. To confirm cell pluripotency, we tracked hESC proliferation and immunostained the cells for pluripotency markers SOX2 and OCT3/4. During differentiation, we investigated the effect of different medium perfusion frequencies on cell reorganization and the expression of the early cardiac mesoderm reporter MESP1mCherry by live-cell imaging. Our study demonstrates that microfluidic technology can be used to automatically culture, differentiate and study hESC in very low-volume culture chambers even without continuous medium perfusion. This result is an important step towards further automation and parallelization in stem cell technology.
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Affiliation(s)
- Anke R Vollertsen
- BIOS Lab On a Chip Group, MESA+ Institute for Nanotechnology, Max Planck - University of Twente Center for Complex Fluid Dynamics, University of Twente, Enschede, The Netherlands.
- Applied Stem Cell Technologies, TechMed Centre, University of Twente, Enschede, The Netherlands.
| | - Simone A Ten Den
- Applied Stem Cell Technologies, TechMed Centre, University of Twente, Enschede, The Netherlands
| | - Verena Schwach
- Applied Stem Cell Technologies, TechMed Centre, University of Twente, Enschede, The Netherlands
| | - Albert van den Berg
- Applied Stem Cell Technologies, TechMed Centre, University of Twente, Enschede, The Netherlands
| | - Robert Passier
- Applied Stem Cell Technologies, TechMed Centre, University of Twente, Enschede, The Netherlands
| | - Andries D van der Meer
- Applied Stem Cell Technologies, TechMed Centre, University of Twente, Enschede, The Netherlands
| | - Mathieu Odijk
- BIOS Lab On a Chip Group, MESA+ Institute for Nanotechnology, Max Planck - University of Twente Center for Complex Fluid Dynamics, University of Twente, Enschede, The Netherlands
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Wen X, Takahashi S, Hatakeyama K, Kamei KI. Evaluation of the Effects of Solvents Used in the Fabrication of Microfluidic Devices on Cell Cultures. MICROMACHINES 2021; 12:550. [PMID: 34066183 PMCID: PMC8151832 DOI: 10.3390/mi12050550] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/08/2021] [Accepted: 05/10/2021] [Indexed: 12/15/2022]
Abstract
Microfluidic microphysiological systems (MPSs) or "organs-on-a-chip" are a promising alternative to animal models for drug screening and toxicology tests. However, most microfluidic devices employ polydimethylsiloxane (PDMS) as the structural material; and this has several drawbacks. Cyclo-olefin polymers (COPs) are more advantageous than PDMS and other thermoplastic materials because of their low drug absorption and autofluorescence. However, most COP-based microfluidic devices are fabricated by solvent bonding of the constituent parts. Notably, the remnant solvent can affect the cultured cells. This study employed a photobonding process with vacuum ultraviolet (VUV) light to fabricate microfluidic devices without using any solvent and compared their performance with that of solvent-bonded systems (using cyclohexane, dichloromethane, or toluene as the solvent) to investigate the effects of residual solvent on cell cultures. Quantitative immunofluorescence assays indicated that the coating efficiencies of extracellular matrix proteins (e.g., Matrigel and collagen I) were lower in solvent-bonded COP devices than those in VUV-bonded devices. Furthermore, the cytotoxicity of the systems was evaluated using SH-SY5Y neuroblastoma cells, and increased apoptosis was observed in the solvent-processed devices. These results provide insights into the effects of solvents used during the fabrication of microfluidic devices and can help prevent undesirable reactions and establish good manufacturing practices.
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Affiliation(s)
- Xiaopeng Wen
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Yoshida-Ushinomiya-cho, Sakyo-ku, Kyoto 606-8501, Japan;
| | - Seiichiro Takahashi
- Incubation Center Organs On Chip Project, Ushio INC, 1-6-5 Marunouchi, Chiyoda-ku, Tokyo 100-8150, Japan; (S.T.); (K.H.)
| | - Kenji Hatakeyama
- Incubation Center Organs On Chip Project, Ushio INC, 1-6-5 Marunouchi, Chiyoda-ku, Tokyo 100-8150, Japan; (S.T.); (K.H.)
| | - Ken-ichiro Kamei
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Yoshida-Ushinomiya-cho, Sakyo-ku, Kyoto 606-8501, Japan;
- Wuya College of Innovation, Shenyang Pharmaceutical University, Liaoning 110016, China
- Department of Pharmaceutics, Shenyang Pharmaceutical University, Liaoning 110016, China
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Abdalkader R, Kamei KI. Multi-corneal barrier-on-a-chip to recapitulate eye blinking shear stress forces. LAB ON A CHIP 2020; 20:1410-1417. [PMID: 32202263 DOI: 10.1039/c9lc01256g] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Human corneal epithelium coexists with tear fluids and shows its barrier functionality under the dynamic conditions of eye blinking. However, the current in vitro cell culture settings for corneal epithelial cells lack the dynamic flow conditions to recapitulate the shear stress of eye blinking, hindering corneal function evaluation. We developed a microfluidic platform enabling the dynamic culture of the human corneal barrier with recapitulation of eye blinking. The device consisted of upper and lower channels separated by a porous membrane. Human corneal epithelial cells (HCE-T) were seeded on the porous membrane (upper channel) and cultured for ten days. The cells formed a barrier with high expression of zonula occludens 1 (ZO-1) tight junction protein on day seven, and the translocation of fluorescein sodium across the barrier in the microfluidic device was comparable to that in the transwell system, used as a control. Then, bidirectional and unidirectional flows were applied in the upper and lower channels, respectively, and the cells in the upper channels were stimulated with 0.6 dyn s cm-2 shear stress. After 24 h, while the fluid stimuli did not affect cell adhesion, they facilitated the expression of cytokeratin 19 (CK-19) intermediate filaments in cells, indicating the strengthening of the barrier function. Furthermore, morphological single-cell analysis revealed an increase in the cell body area rather than nuclei. We envision that this multi-corneal barrier-on-a-chip device will unlock new possibilities in ophthalmic drug development and will be useful for studying the effects of eye blinking shear stress on the ocular surface.
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Affiliation(s)
- Rodi Abdalkader
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Yoshida-Ushinomiya-cho, Sakyo-ku, Kyoto 606-8501, Japan.
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Towards Three-Dimensional Dynamic Regulation and In Situ Characterization of Single Stem Cell Phenotype Using Microfluidics. Mol Biotechnol 2018; 60:843-861. [DOI: 10.1007/s12033-018-0113-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Mashimo Y, Yoshioka M, Tokunaga Y, Fockenberg C, Terada S, Koyama Y, Shibata-Seki T, Yoshimoto K, Sakai R, Hakariya H, Liu L, Akaike T, Kobatake E, How SE, Uesugi M, Chen Y, Kamei KI. Fabrication of a Multiplexed Artificial Cellular MicroEnvironment Array. J Vis Exp 2018. [PMID: 30247461 DOI: 10.3791/57377] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Cellular microenvironments consist of a variety of cues, such as growth factors, extracellular matrices, and intercellular interactions. These cues are well orchestrated and are crucial in regulating cell functions in a living system. Although a number of researchers have attempted to investigate the correlation between environmental factors and desired cellular functions, much remains unknown. This is largely due to the lack of a proper methodology to mimic such environmental cues in vitro, and simultaneously test different environmental cues on cells. Here, we report an integrated platform of microfluidic channels and a nanofiber array, followed by high-content single-cell analysis, to examine stem cell phenotypes altered by distinct environmental factors. To demonstrate the application of this platform, this study focuses on the phenotypes of self-renewing human pluripotent stem cells (hPSCs). Here, we present the preparation procedures for a nanofiber array and the microfluidic structure in the fabrication of a Multiplexed Artificial Cellular MicroEnvironment (MACME) array. Moreover, overall steps of the single-cell profiling, cell staining with multiple fluorescent markers, multiple fluorescence imaging, and statistical analyses, are described.
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Affiliation(s)
- Yasumasa Mashimo
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University; Department of Life Science and Technology, School of Life Science and Technology, Tokyo Institute of Technology
| | - Momoko Yoshioka
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University
| | - Yumie Tokunaga
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University
| | | | - Shiho Terada
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University
| | - Yoshie Koyama
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University
| | - Teiko Shibata-Seki
- Department of Life Science and Technology, School of Life Science and Technology, Tokyo Institute of Technology
| | - Koki Yoshimoto
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University
| | - Risako Sakai
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University
| | - Hayase Hakariya
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University
| | - Li Liu
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University
| | - Toshihiro Akaike
- Biomaterials Center for Regenerative Medical Engineering, Foundation for Advancement of International Science
| | - Eiry Kobatake
- Department of Life Science and Technology, School of Life Science and Technology, Tokyo Institute of Technology
| | - Siew-Eng How
- Faculty of Science and Natural Resources, Universiti Malaysia Sabah
| | - Motonari Uesugi
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University; Institute for Chemical Research, Kyoto University
| | - Yong Chen
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University; Ecole Normale Supérieure
| | - Ken-Ichiro Kamei
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University;
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