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Abdellatef SA, Bard F, Nakanishi J. Photoactivatable substrates show diverse phenotypes of leader cells in collective migration when moving along different extracellular matrix proteins. Biomater Sci 2024; 12:3446-3457. [PMID: 38832531 DOI: 10.1039/d4bm00225c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
In cancer metastasis, collectively migrating clusters are discriminated into leader and follower cells that move through extracellular matrices (ECMs) with different characteristics. The impact of changes in ECM protein types on leader cells and migrating clusters is unknown. To address this, we investigated the response of leader cells and migrating clusters upon moving from one ECM protein to another using a photoactivatable substrate bearing photocleavable PEG (PCP), whose surface changes from protein-repellent to protein-adhesive in response to light. We chose laminin and collagen I for our study since they are abundant in two distinct regions in living tissues, namely basement membrane and connective tissue. Using the photoactivatable substrates, the precise deposition of the first ECM protein in the irradiated areas was achieved, followed by creating well-defined cellular confinements. Secondary irradiation enabled the deposition of the second ECM protein in the new irradiated regions, resulting in region-selective heterogeneous and homogenous ECM protein-coated surfaces. Different tendencies in leader cell formation from laminin into laminin compared to those migrating from laminin into collagen were observed. The formation of focal adhesion and actin structures for cells within the same cluster in the ECM proteins responded according to the underlying ECM protein type. Finally, integrin β1 was crucial for the appearance of leader cells for clusters migrating from laminin into collagen. However, when it came to laminin into laminin, integrin β1 was not responsible. This highlights the correlation between leader cells in collective migration and the biochemical signals that arise from underlying extracellular matrix proteins.
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Affiliation(s)
- Shimaa A Abdellatef
- Mechanobiology group, Research Centre for Macromolecules and Biomaterials, National Institute for Materials Science (NIMS), Tsukuba, Japan.
| | - Francesca Bard
- Mechanobiology group, Research Centre for Macromolecules and Biomaterials, National Institute for Materials Science (NIMS), Tsukuba, Japan.
- Department of Material Science and Engineering, Cornell University, Ithaca, NY, USA
| | - Jun Nakanishi
- Mechanobiology group, Research Centre for Macromolecules and Biomaterials, National Institute for Materials Science (NIMS), Tsukuba, Japan.
- Waseda University Graduate School of Advanced Science and Engineering Department of Nanoscience and Engineering, Tokyo, Japan
- Tokyo University of Science, advanced Graduate School of Engineering Materials Innovation Engineering, Japan
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2
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Wang H, Zhang H, Tamura R, Da B, Abdellatef SA, Watanabe I, Ishida N, Fujita D, Hanagata N, Nakagawa T, Nakanishi J. Mapping stress inside living cells by atomic force microscopy in response to environmental stimuli. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2023; 24:2265434. [PMID: 37867575 PMCID: PMC10586080 DOI: 10.1080/14686996.2023.2265434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 09/26/2023] [Indexed: 10/24/2023]
Abstract
The response of cells to environmental stimuli, under either physiological or pathological conditions, plays a key role in determining cell fate toward either adaptive survival or controlled death. The efficiency of such a feedback mechanism is closely related to the most challenging human diseases, including cancer. Since cellular responses are implemented through physical forces exerted on intracellular components, more detailed knowledge of force distribution through modern imaging techniques is needed to ensure a mechanistic understanding of these forces. In this work, we mapped these intracellular forces at a whole-cell scale and with submicron resolution to correlate intracellular force distribution to the cytoskeletal structures. Furthermore, we visualized dynamic mechanical responses of the cells adapting to environmental modulations in situ. Such task was achieved by using an informatics-assisted atomic force microscope (AFM) indentation technique where a key step was Markov-chain Monte Carlo optimization to search for both the models used to fit indentation force-displacement curves and probe geometry descriptors. We demonstrated force dynamics within cytoskeleton, as well as nucleoskeleton in living cells which were subjected to mechanical state modulation: myosin motor inhibition, micro-compression stimulation and geometrical confinement manipulation. Our results highlight the alteration in the intracellular prestress to attenuate environmental stimuli; to involve in cellular survival against mechanical signal-initiated death during cancer growth and metastasis; and to initiate cell migration.
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Affiliation(s)
- Hongxin Wang
- Research Center for Macromolecules and Biomaterials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
| | - Han Zhang
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
| | - Ryo Tamura
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
| | - Bo Da
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
| | - Shimaa A. Abdellatef
- Research Center for Macromolecules and Biomaterials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
| | - Ikumu Watanabe
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
| | - Nobuyuki Ishida
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
| | - Daisuke Fujita
- Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
| | - Nobutaka Hanagata
- Research Network and Facility Services Division, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
| | - Tomoki Nakagawa
- Department of Diagnostic Pathology, University of Tsukuba Hospital, Tsukuba, Ibaraki, Japan
| | - Jun Nakanishi
- Research Center for Macromolecules and Biomaterials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
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3
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Xu J, Wang Q, Li X, Zheng Y, Ji B. Cellular mechanisms of wound closure under cyclic stretching. Biophys J 2023; 122:2404-2420. [PMID: 36966361 PMCID: PMC10322892 DOI: 10.1016/j.bpj.2023.03.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 02/23/2023] [Accepted: 03/22/2023] [Indexed: 03/27/2023] Open
Abstract
Wound closure is a fundamental process in many physiological and pathological processes, but the regulating effects of external force on the closure process are still unclear. Here, we systematically studied the closure process of wounds of different shape under cyclic stretching. We found that the stretching amplitude and direction had significant effect on the healing speed and healing mode. For instance, there was a biphasic dependence of the healing speed on the stretching amplitude. That is, the wound closure was faster under relatively small and large amplitude, while it was slower under intermediate amplitude. At the same time, the stretching could regulate the healing pattern. We showed that the stretching would increase the healing speed along the direction perpendicular to the stretching direction. Specifically, when the stretching was along the major axis of the wound, it accelerated the healing speed along the short axis, which induced a rosette to stitching-line mode transition. In contrast, stretching along the minor axis accelerated the healing speed along the long axis, inducing a stitching-line to rosette mode transition. Our theoretical analyses demonstrated that the wound closure process was coregulated by the mechanical factors including prestress in the cytoskeleton, the protrusion of cells, and the contraction of the actin ring, as well as the geometry of the wound. The cyclic stretch could further modulate the roles of these factors. For example, the stretching changed the stress field in the cell layer, and switched the direction of cell protrusions. This article reveals important cellular mechanisms of the wound healing process under cyclic stretching, and provides an insight into possible approaches of regulating cell collective behaviors via mechanical forces.
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Affiliation(s)
- Jiayi Xu
- Department of Applied Mechanics, Beijing Institute of Technology, Beijing, China; Wenzhou Key Laboratory of Biophysics, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, China
| | - Qianchun Wang
- Wenzhou Key Laboratory of Biophysics, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, China
| | - Xiaojun Li
- Department of Applied Mechanics, Beijing Institute of Technology, Beijing, China
| | - Yifei Zheng
- Institute of Biomechanics and Applications, Department of Engineering Mechanics, Zhejiang University, Hangzhou, China
| | - Baohua Ji
- Institute of Biomechanics and Applications, Department of Engineering Mechanics, Zhejiang University, Hangzhou, China.
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4
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Sakakibara S, Abdellatef SA, Yamamoto S, Kamimura M, Nakanishi J. Photoactivatable surfaces resolve the impact of gravity vector on collective cell migratory characteristics. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2023; 24:2206525. [PMID: 37151805 PMCID: PMC10158565 DOI: 10.1080/14686996.2023.2206525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Despite considerable interest in the impact of space travel on human health, the influence of the gravity vector on collective cell migration remains unclear. This is primarily because of the difficulty in inducing collective migration, where cell clusters appear in an inverted position against gravity, without cellular damage. In this study, photoactivatable surfaces were used to overcome this challenge. Photoactivatable surfaces enable the formation of geometry-controlled cellular clusters and the remote induction of cellular migration via photoirradiation, thereby maintaining the cells in the inverted position. Substrate inversion preserved the circularity of cellular clusters compared to cells in the normal upright position, with less leader cell appearance. Furthermore, the inversion of cells against the gravity vector resulted in the remodeling of the cytoskeletal system via the strengthening of external actin bundles. Within the 3D cluster architecture, enhanced accumulation of active myosin was observed in the upper cell-cell junction, with a flattened apical surface. Depending on the gravity vector, attenuating actomyosin activity correlates with an increase in the number of leader cells, indicating the importance of cell contractility in collective migration phenotypes and cytoskeletal remodeling.
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Affiliation(s)
- Shinya Sakakibara
- Research Center for Macromolecules and Biomaterials, National Institute for Materials Science (NIMS), Tsukuba, Japan
- Graduate School of Advanced Engineering, Tokyo University of Science, Tokyo, Japan
| | - Shimaa A. Abdellatef
- Research Center for Macromolecules and Biomaterials, National Institute for Materials Science (NIMS), Tsukuba, Japan
- CONTACT Shimaa A. Abdellatef
| | - Shota Yamamoto
- Research Center for Macromolecules and Biomaterials, National Institute for Materials Science (NIMS), Tsukuba, Japan
| | - Masao Kamimura
- Graduate School of Advanced Engineering, Tokyo University of Science, Tokyo, Japan
| | - Jun Nakanishi
- Research Center for Macromolecules and Biomaterials, National Institute for Materials Science (NIMS), Tsukuba, Japan
- Graduate School of Advanced Engineering, Tokyo University of Science, Tokyo, Japan
- Graduate school of Advanced Science and Engineering, Waseda University, Tokyo, Japan
- Jun Nakanishi Research Center for Macromolecules and Biomaterials, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba305-0044, Japan
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5
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Fu C, Wang J, Pallikkuth S, Ding Y, Chen J, Wren JD, Yang Y, Wong KK, Kameyama H, Jayaraman M, Munshi A, Tanaka T, Lidke KA, Zhang XA. EWI2 prevents EGFR from clustering and endocytosis to reduce tumor cell movement and proliferation. Cell Mol Life Sci 2022; 79:389. [PMID: 35773608 PMCID: PMC10428948 DOI: 10.1007/s00018-022-04417-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 05/27/2022] [Accepted: 06/06/2022] [Indexed: 12/01/2022]
Abstract
EWI2 is a transmembrane immunoglobulin superfamily (IgSF) protein that physically associates with tetraspanins and integrins. It inhibits cancer cells by influencing the interactions among membrane molecules including the tetraspanins and integrins. The present study revealed that, upon EWI2 silencing or ablation, the elevated movement and proliferation of cancer cells in vitro and increased cancer metastatic potential and malignancy in vivo are associated with (i) increases in clustering, endocytosis, and then activation of EGFR and (ii) enhancement of Erk MAP kinase signaling. These changes in signaling make cancer cells (i) undergo partial epithelial-to-mesenchymal (EMT) for more tumor progression and (ii) proliferate faster for better tumor formation. Inhibition of EGFR or Erk kinase can abrogate the cancer cell phenotypes resulting from EWI2 removal. Thus, to inhibit cancer cells, EWI2 prevents EGFR from clustering and endocytosis to restrain its activation and signaling.
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Affiliation(s)
- Chenying Fu
- University of Oklahoma Health Sciences Center, Oklahoma City, USA
| | - Jie Wang
- University of Oklahoma Health Sciences Center, Oklahoma City, USA
| | | | - Yingjun Ding
- University of Oklahoma Health Sciences Center, Oklahoma City, USA
| | - Junxiong Chen
- University of Oklahoma Health Sciences Center, Oklahoma City, USA
| | | | - Yuchao Yang
- University of Oklahoma Health Sciences Center, Oklahoma City, USA
| | | | | | | | - Anupama Munshi
- University of Oklahoma Health Sciences Center, Oklahoma City, USA
| | - Takemi Tanaka
- University of Oklahoma Health Sciences Center, Oklahoma City, USA
| | | | - Xin A Zhang
- University of Oklahoma Health Sciences Center, Oklahoma City, USA.
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Kozyrska K, Pilia G, Vishwakarma M, Wagstaff L, Goschorska M, Cirillo S, Mohamad S, Gallacher K, Carazo Salas RE, Piddini E. p53 directs leader cell behavior, migration, and clearance during epithelial repair. Science 2022; 375:eabl8876. [PMID: 35143293 DOI: 10.1126/science.abl8876] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Epithelial cells migrate across wounds to repair injured tissue. Leader cells at the front of migrating sheets often drive this process. However, it is unclear how leaders emerge from an apparently homogeneous epithelial cell population. We characterized leaders emerging from epithelial monolayers in cell culture and found that they activated the stress sensor p53, which was sufficient to initiate leader cell behavior. p53 activated the cell cycle inhibitor p21WAF1/CIP1, which in turn induced leader behavior through inhibition of cyclin-dependent kinase activity. p53 also induced crowding hypersensitivity in leader cells such that, upon epithelial closure, they were eliminated by cell competition. Thus, mechanically induced p53 directs emergence of a transient population of leader cells that drive migration and ensures their clearance upon epithelial repair.
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Affiliation(s)
- Kasia Kozyrska
- School of Cellular and Molecular Medicine, University of Bristol, Bristol BS8 1TD, UK
- The Wellcome Trust/Cancer Research UK Gurdon Institute and Department of Zoology, University of Cambridge, Cambridge CB2 1QN, UK
| | - Giulia Pilia
- School of Cellular and Molecular Medicine, University of Bristol, Bristol BS8 1TD, UK
| | - Medhavi Vishwakarma
- School of Cellular and Molecular Medicine, University of Bristol, Bristol BS8 1TD, UK
| | - Laura Wagstaff
- The Wellcome Trust/Cancer Research UK Gurdon Institute and Department of Zoology, University of Cambridge, Cambridge CB2 1QN, UK
| | - Maja Goschorska
- School of Cellular and Molecular Medicine, University of Bristol, Bristol BS8 1TD, UK
| | - Silvia Cirillo
- School of Cellular and Molecular Medicine, University of Bristol, Bristol BS8 1TD, UK
| | - Saad Mohamad
- School of Cellular and Molecular Medicine, University of Bristol, Bristol BS8 1TD, UK
| | - Kelli Gallacher
- School of Cellular and Molecular Medicine, University of Bristol, Bristol BS8 1TD, UK
| | - Rafael E Carazo Salas
- School of Cellular and Molecular Medicine, University of Bristol, Bristol BS8 1TD, UK
| | - Eugenia Piddini
- School of Cellular and Molecular Medicine, University of Bristol, Bristol BS8 1TD, UK
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7
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Skamrahl M, Pang H, Ferle M, Gottwald J, Rübeling A, Maraspini R, Honigmann A, Oswald TA, Janshoff A. Tight Junction ZO Proteins Maintain Tissue Fluidity, Ensuring Efficient Collective Cell Migration. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2100478. [PMID: 34382375 PMCID: PMC8498871 DOI: 10.1002/advs.202100478] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 06/18/2021] [Indexed: 06/01/2023]
Abstract
Tight junctions (TJs) are essential components of epithelial tissues connecting neighboring cells to provide protective barriers. While their general function to seal compartments is well understood, their role in collective cell migration is largely unexplored. Here, the importance of the TJ zonula occludens (ZO) proteins ZO1 and ZO2 for epithelial migration is investigated employing video microscopy in conjunction with velocimetry, segmentation, cell tracking, and atomic force microscopy/spectroscopy. The results indicate that ZO proteins are necessary for fast and coherent migration. In particular, ZO1 and 2 loss (dKD) induces actomyosin remodeling away from the central cortex towards the periphery of individual cells, resulting in altered viscoelastic properties. A tug-of-war emerges between two subpopulations of cells with distinct morphological and mechanical properties: 1) smaller and highly contractile cells with an outward bulging apical membrane, and 2) larger, flattened cells, which, due to tensile stress, display a higher proliferation rate. In response, the cell density increases, leading to crowding-induced jamming and more small cells over time. Co-cultures comprising wildtype and dKD cells migrate inefficiently due to phase separation based on differences in contractility rather than differential adhesion. This study shows that ZO proteins are necessary for efficient collective cell migration by maintaining tissue fluidity and controlling proliferation.
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Affiliation(s)
- Mark Skamrahl
- Institute of Physical ChemistryUniversity of GöttingenTammannstr. 6Göttingen37077Germany
| | - Hongtao Pang
- Institute of Physical ChemistryUniversity of GöttingenTammannstr. 6Göttingen37077Germany
| | - Maximilian Ferle
- Institute of Physical ChemistryUniversity of GöttingenTammannstr. 6Göttingen37077Germany
| | - Jannis Gottwald
- Institute of Physical ChemistryUniversity of GöttingenTammannstr. 6Göttingen37077Germany
| | - Angela Rübeling
- Institute of Organic and Biomolecular ChemistryUniversity of GöttingenTammannstr. 2Göttingen37077Germany
| | - Riccardo Maraspini
- Max Planck Institute of Molecular Cell Biology and GeneticsPfotenhauerstraße 108Dresden01307Germany
| | - Alf Honigmann
- Max Planck Institute of Molecular Cell Biology and GeneticsPfotenhauerstraße 108Dresden01307Germany
| | - Tabea A. Oswald
- Institute of Organic and Biomolecular ChemistryUniversity of GöttingenTammannstr. 2Göttingen37077Germany
| | - Andreas Janshoff
- Institute of Physical ChemistryUniversity of GöttingenTammannstr. 6Göttingen37077Germany
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8
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Djakbarova U, Madraki Y, Chan ET, Kural C. Dynamic interplay between cell membrane tension and clathrin-mediated endocytosis. Biol Cell 2021; 113:344-373. [PMID: 33788963 DOI: 10.1111/boc.202000110] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 03/08/2021] [Accepted: 03/19/2021] [Indexed: 12/26/2022]
Abstract
Deformability of the plasma membrane, the outermost surface of metazoan cells, allows cells to be dynamic, mobile and flexible. Factors that affect this deformability, such as tension on the membrane, can regulate a myriad of cellular functions, including membrane resealing, cell motility, polarisation, shape maintenance, membrane area control and endocytic vesicle trafficking. This review focuses on mechanoregulation of clathrin-mediated endocytosis (CME). We first delineate the origins of cell membrane tension and the factors that yield to its spatial and temporal fluctuations within cells. We then review the recent literature demonstrating that tension on the membrane is a fast-acting and reversible regulator of CME. Finally, we discuss tension-based regulation of endocytic clathrin coat formation during physiological processes.
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Affiliation(s)
| | - Yasaman Madraki
- Department of Physics, The Ohio State University, Columbus, OH, 43210, USA
| | - Emily T Chan
- Interdisciplinary Biophysics Graduate Program, The Ohio State University, Columbus, OH, 43210, USA.,Molecular Biophysics Training Program, The Ohio State University, Columbus, OH, 43210, USA
| | - Cömert Kural
- Department of Physics, The Ohio State University, Columbus, OH, 43210, USA.,Interdisciplinary Biophysics Graduate Program, The Ohio State University, Columbus, OH, 43210, USA
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9
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Yu J, Cai P, Zhang X, Zhao T, Liang L, Zhang S, Liu H, Chen X. Spatiotemporal Oscillation in Confined Epithelial Motion upon Fluid-to-Solid Transition. ACS NANO 2021; 15:7618-7627. [PMID: 33844497 DOI: 10.1021/acsnano.1c01165] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Fluid-to-solid phase transition in multicellular assembly is crucial in many developmental biological processes, such as embryogenesis and morphogenesis. However, biomechanical studies in this area are limited, and little is known about factors governing the transition and how cell behaviors are regulated. Due to different stresses present, cells could behave distinctively depending on the nature of tissue. Here we report a fluid-to-solid transition in geometrically confined multicellular assemblies. Under circular confinement, Madin-Darby canine kidney (MDCK) monolayers undergo spatiotemporally oscillatory motions that are strongly dependent on the confinement size and distance from the periphery of the monolayers. Nanomechanical mapping reveals that epithelial tensional stress and traction forces on the substrate are both dependent on confinement size. The oscillation pattern and cellular nanomechanics profile appear well correlated with stress fiber assembly and cell polarization. These experimental observations imply that the confinement size-dependent surface tension regulates actin fiber assembly, cellular force generation, and cell polarization. Our analyses further suggest a characteristic confinement size (approximates to MDCK's natural correlation length) below which surface tension is sufficiently high and triggers a fluid-to-solid transition of the monolayers. Our findings may shed light on the geometrical and nanomechanical control of tissue morphogenesis and growth.
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Affiliation(s)
- Jing Yu
- Innovative Center for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Pingqiang Cai
- Innovative Center for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Xiaoqian Zhang
- Innovative Center for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Tiankai Zhao
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Linlin Liang
- Innovative Center for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
- Institute for Advanced Interdisciplinary Research, University of Jinan, Jinan 250022, China
| | - Sulin Zhang
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Hong Liu
- Institute for Advanced Interdisciplinary Research, University of Jinan, Jinan 250022, China
| | - Xiaodong Chen
- Innovative Center for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
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10
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Gao J, Yang C, Li J, Liu S, Ao Z, Han D. Interfacial Curvature as a Potential Index for Prognosis of Colon Adenocarcinoma. Adv Biol (Weinh) 2021; 5:e1900277. [PMID: 33729697 DOI: 10.1002/adbi.201900277] [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: 11/23/2019] [Revised: 12/14/2020] [Indexed: 11/07/2022]
Abstract
Tumor invasion and metastasis are complex interfacial mechanical processes between the tumor and its surrounding tissue, with the interfacial curvature of tumor playing an important role in cancer progression. In this study, the potential role of interfacial curvature in the prognosis of patients with colon adenocarcinoma is investigated. The front edge interfacial curvature of adenocarcinoma from biopsies of patients in different tumor, lymph node, and metastasis (TNM) stages are calculated and compared, and prognosis assessment is conducted using Kaplan-Meier and Cox proportional hazards regression analyses. Results reveal that patients with larger interfacial curvature of adenocarcinoma are more likely to belong to higher TNM stages. Concomitantly, in the same TNM stage, patients with increased adenocarcinoma interfacial curvature show worse prognosis with higher recurrence and lower survival rates. Besides, interfacial curvature is an independent prognostic factor for cause-specific survival and relapse-free survival among all selected patients. Mechanical models of colon adenocarcinoma invasion and metastasis are established to better understand the close association between interfacial curvature and tumor progression. The results together with hematoxylin and eosin staining indicate that metastasis in stages T3N0M0 and T3N1M0 may be linked to large interfacial curvatures. Therefore, interfacial curvature may serve as a potential index for predicting prognosis in patients with colon adenocarcinoma.
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Affiliation(s)
- Jingwei Gao
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety and CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Chongqing Yang
- Pathology Department, Beijing Hospital, Beijing, 100730, P. R. China
| | - Jianjun Li
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety and CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Sidi Liu
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety and CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Zhuo Ao
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety and CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Dong Han
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety and CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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11
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Khetan N, Athale CA. Aster swarming by symmetry breaking of cortical dynein transport and coupling kinesins. SOFT MATTER 2020; 16:8554-8564. [PMID: 32840555 DOI: 10.1039/d0sm01086c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Microtubule (MT) radial arrays or asters establish the internal topology of a cell by interacting with organelles and molecular motors. We proceed to understand the general pattern forming potential of aster-motor systems using a computational model of multiple MT asters interacting with motors in cellular confinement. In this model dynein motors are attached to the cell cortex and plus-ended motors resembling kinesin-5 diffuse in the cell interior. The introduction of 'noise' in the form of MT length fluctuations spontaneously results in the emergence of coordinated, achiral vortex-like rotation of asters. The coherence and persistence of rotation require a threshold density of both cortical dyneins and coupling kinesins, while the onset is diffusion-limited with relation to the cortical dynein mobility. The coordinated rotational motion emerges due to the resolution of a 'tug-of-war' of multiple cortical dynein motors bound to MTs of the same aster by 'noise' in the form of MT dynamic instability. This transient symmetry breaking is amplified by local coupling by kinesin-5 complexes. The lack of widespread aster rotation across cell types suggests that biophysical mechanisms that suppress such intrinsic dynamics may have evolved. This model is analogous to more general models of locally coupled self-propelled particles (SPP) that spontaneously undergo collective transport in the presence of 'noise' that have been invoked to explain swarming in birds and fish. However, the aster-motor system is distinct from SPP models with regard to the particle density and 'noise' dependence, providing a set of experimentally testable predictions for a novel sub-cellular pattern forming system.
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Affiliation(s)
- Neha Khetan
- Div. of Biology, IISER Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.
| | - Chaitanya A Athale
- Div. of Biology, IISER Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.
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12
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Zhang X, Ruan Q, Zhai Y, Lu D, Li C, Fu Y, Zheng Z, Song Y, Guo J. Baicalein inhibits non-small-cell lung cancer invasion and metastasis by reducing ezrin tension in inflammation microenvironment. Cancer Sci 2020; 111:3802-3812. [PMID: 32691974 PMCID: PMC7540981 DOI: 10.1111/cas.14577] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 07/04/2020] [Accepted: 07/15/2020] [Indexed: 12/21/2022] Open
Abstract
Baicalein, a flavonoid phytochemical, has been shown to be effective as an anti‐metastatic agent for various cancers, especially for non‐small‐cell lung cancer (NSCLC). However, the underlying mechanism of how baicalein targets cellular processes during NSCLC cell invasion and metastasis remains elusive. In this study, we found that non‐cytotoxic concentrations of baicalein still retained anti‐dissemination activity both in vitro and in vivo. Using a genetic encoding tension probe based on Förster resonance energy transfer (FRET) theory, baicalein was shown to significantly decrease ezrin tension by downregulating cellular ezrin S‐nitrosylation (SNO) levels in NSCLC cells in the inflammatory microenvironment. Decreased ezrin tension inhibited the formation of an aggressive phenotype of NSCLC cell and leader cell in collective migration, and subsequently suppressed NSCLC dissemination. Baicalein restrained SNO‐mediated ezrin tension by decreasing iNOS expression levels. Overall this study demonstrates the novel mechanism used by baicalein to suppress NSCLC invasion and metastasis from a mechanopharmacology perspective and illustrates a new direction for drug development.
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Affiliation(s)
- Xiaolong Zhang
- School of Medicine and Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China.,Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Qinli Ruan
- School of Medicine and Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yiqian Zhai
- School of Medicine and Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Dandan Lu
- School of Medicine and Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Chen Li
- School of Medicine and Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yahan Fu
- School of Medicine and Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Zihui Zheng
- School of Medicine and Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Ying Song
- Department of Respiratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jun Guo
- School of Medicine and Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
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13
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Vishwakarma M, Thurakkal B, Spatz JP, Das T. Dynamic heterogeneity influences the leader-follower dynamics during epithelial wound closure. Philos Trans R Soc Lond B Biol Sci 2020; 375:20190391. [PMID: 32713308 DOI: 10.1098/rstb.2019.0391] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Cells of epithelial tissue proliferate and pack together to attain an eventual density homeostasis. As the cell density increases, spatial distribution of velocity and force show striking similarity to the dynamic heterogeneity observed elsewhere in dense granular matter. While the physical nature of this heterogeneity is somewhat known in the epithelial cell monolayer, its biological relevance and precise connection to cell density remain elusive. Relevantly, we had demonstrated how large-scale dynamic heterogeneity in the monolayer stress field in the bulk could critically influence the emergence of leader cells at the wound margin during wound closure, but did not connect the observation to the corresponding cell density. In fact, numerous previous reports had essentially associated long-range force and velocity correlation with either cell density or dynamic heterogeneity, without any generalization. Here, we attempted to unify these two parameters under a single framework and explored their consequence on the dynamics of leader cells, which eventually affected the efficacy of collective migration and wound closure. To this end, we first quantified the dynamic heterogeneity by the peak height of four-point susceptibility. Remarkably, this quantity showed a linear relationship with cell density over many experimental samples. We then varied the heterogeneity, by changing cell density, and found this change altered the number of leader cells at the wound margin. At low heterogeneity, wound closure was slower, with decreased persistence, reduced coordination and disruptive leader-follower interactions. Finally, microscopic characterization of cell-substrate adhesions illustrated how heterogeneity influenced orientations of focal adhesions, affecting coordinated cell movements. Together, these results demonstrate the importance of dynamic heterogeneity in epithelial wound healing. This article is part of the theme issue 'Multi-scale analysis and modelling of collective migration in biological systems'.
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Affiliation(s)
- Medhavi Vishwakarma
- School of Cellular and Molecular Medicine, University of Bristol, University Walk, Bristol BS8 1TD, UK.,Department of Cellular Biophysics, Max Planck Institute for Medical Research, Heidelberg 69120, Germany
| | - Basil Thurakkal
- TIFR Centre for Interdisciplinary Sciences, Tata Institute of Fundamental Research Hyderabad (TIFR-H), Hyderabad 500046, India
| | - Joachim P Spatz
- Department of Cellular Biophysics, Max Planck Institute for Medical Research, Heidelberg 69120, Germany.,Department of Biophysical Chemistry, University of Heidelberg, Heidelberg 69117, Germany
| | - Tamal Das
- TIFR Centre for Interdisciplinary Sciences, Tata Institute of Fundamental Research Hyderabad (TIFR-H), Hyderabad 500046, India
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14
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Vishwakarma M, Spatz JP, Das T. Mechanobiology of leader-follower dynamics in epithelial cell migration. Curr Opin Cell Biol 2020; 66:97-103. [PMID: 32663734 DOI: 10.1016/j.ceb.2020.05.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 05/07/2020] [Accepted: 05/08/2020] [Indexed: 12/21/2022]
Abstract
Collective cell migration is fundamental to biological form and function. It is also relevant to the formation and repair of organs and to various pathological situations, including metastatic propagation of cancer. Technological, experimental, and computational advancements have allowed the researchers to explore various aspects of collective migration, spanning from biochemical signalling to inter-cellular force transduction. Here, we summarize our current understanding of the mechanobiology of collective cell migration, limiting to epithelial tissues. On the basis of recent studies, we describe how cells sense and respond to guidance signals to orchestrate various modes of migration and identify the determining factors dictating leader-follower interactions. We highlight how the inherent mechanics of dense epithelial monolayers at multicellular length scale might instruct individual cells to behave collectively. On the basis of these findings, we propose that mechanical resilience, obtained by a certain extent of cell jamming, allows the epithelium to perform efficient collective migration during wound healing.
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Affiliation(s)
- Medhavi Vishwakarma
- School of Cellular and Molecular Medicine, University of Bristol, University Walk, Bristol BS81TD, United Kingdom; Department of Cellular Biophysics, Max Planck Institute for Medical Research, Heidelberg 69120, Germany
| | - Joachim P Spatz
- Department of Cellular Biophysics, Max Planck Institute for Medical Research, Heidelberg 69120, Germany; Department of Biophysical Chemistry, University of Heidelberg, Heidelberg 69117, Germany
| | - Tamal Das
- TIFR Centre for Interdisciplinary Sciences, Tata Institute of Fundamental Research Hyderabad (TIFR-H), Hyderabad 500046, India.
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15
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Mazalan MB, Ramlan MAB, Shin JH, Ohashi T. Effect of Geometric Curvature on Collective Cell Migration in Tortuous Microchannel Devices. MICROMACHINES 2020; 11:E659. [PMID: 32630662 PMCID: PMC7408538 DOI: 10.3390/mi11070659] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 06/27/2020] [Accepted: 06/29/2020] [Indexed: 01/22/2023]
Abstract
Collective cell migration is an essential phenomenon in many naturally occurring pathophysiological processes, as well as in tissue engineering applications. Cells in tissues and organs are known to sense chemical and mechanical signals from the microenvironment and collectively respond to these signals. For the last few decades, the effects of chemical signals such as growth factors and therapeutic agents on collective cell behaviors in the context of tissue engineering have been extensively studied, whereas those of the mechanical cues have only recently been investigated. The mechanical signals can be presented to the constituent cells in different forms, including topography, substrate stiffness, and geometrical constraint. With the recent advancement in microfabrication technology, researchers have gained the ability to manipulate the geometrical constraints by creating 3D structures to mimic the tissue microenvironment. In this study, we simulate the pore curvature as presented to the cells within 3D-engineered tissue-scaffolds by developing a device that features tortuous microchannels with geometric variations. We show that both cells at the front and rear respond to the varying radii of curvature and channel amplitude by altering the collective migratory behavior, including cell velocity, morphology, and turning angle. These findings provide insights into adaptive migration modes of collective cells to better understand the underlying mechanism of cell migration for optimization of the engineered tissue-scaffold design.
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Affiliation(s)
- Mazlee Bin Mazalan
- Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan;
- AMBIENCE, School of Microelectronic Engineering, Universiti Malaysia Perlis, Arau 02600, Perlis, Malaysia
| | | | - Jennifer Hyunjong Shin
- Department of Mechanical Engineering, Korea Advanced Institute of Science & Technology, Daejeon 34141, Korea;
| | - Toshiro Ohashi
- Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan;
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16
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17
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Leggett SE, Neronha ZJ, Bhaskar D, Sim JY, Perdikari TM, Wong IY. Motility-limited aggregation of mammary epithelial cells into fractal-like clusters. Proc Natl Acad Sci U S A 2019; 116:17298-17306. [PMID: 31413194 PMCID: PMC6717304 DOI: 10.1073/pnas.1905958116] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Migratory cells transition between dispersed individuals and multicellular collectives during development, wound healing, and cancer. These transitions are associated with coordinated behaviors as well as arrested motility at high cell densities, but remain poorly understood at lower cell densities. Here, we show that dispersed mammary epithelial cells organize into arrested, fractal-like clusters at low density in reduced epidermal growth factor (EGF). These clusters exhibit a branched architecture with a fractal dimension of [Formula: see text], reminiscent of diffusion-limited aggregation of nonliving colloidal particles. First, cells display diminished motility in reduced EGF, which permits irreversible adhesion upon cell-cell contact. Subsequently, leader cells emerge that guide collectively migrating strands and connect clusters into space-filling networks. Thus, this living system exhibits gelation-like arrest at low cell densities, analogous to the glass-like arrest of epithelial monolayers at high cell densities. We quantitatively capture these behaviors with a jamming-like phase diagram based on local cell density and EGF. These individual to collective transitions represent an intriguing link between living and nonliving systems, with potential relevance for epithelial morphogenesis into branched architectures.
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Affiliation(s)
- Susan E Leggett
- School of Engineering, Center for Biomedical Engineering, Brown University, Providence, RI 02912
- Pathobiology Graduate Program, Brown University, Providence, RI 02912
| | - Zachary J Neronha
- School of Engineering, Center for Biomedical Engineering, Brown University, Providence, RI 02912
| | - Dhananjay Bhaskar
- School of Engineering, Center for Biomedical Engineering, Brown University, Providence, RI 02912
| | - Jea Yun Sim
- School of Engineering, Center for Biomedical Engineering, Brown University, Providence, RI 02912
| | - Theodora Myrto Perdikari
- School of Engineering, Center for Biomedical Engineering, Brown University, Providence, RI 02912
| | - Ian Y Wong
- School of Engineering, Center for Biomedical Engineering, Brown University, Providence, RI 02912;
- Pathobiology Graduate Program, Brown University, Providence, RI 02912
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18
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Yoon C, Choi C, Stapleton S, Mirabella T, Howes C, Dong L, King J, Yang J, Oberai A, Eyckmans J, Chen CS. Myosin IIA-mediated forces regulate multicellular integrity during vascular sprouting. Mol Biol Cell 2019; 30:1974-1984. [PMID: 31318321 PMCID: PMC6727772 DOI: 10.1091/mbc.e19-02-0076] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Angiogenic sprouting is a critical process involved in vascular network formation within tissues. During sprouting, tip cells and ensuing stalk cells migrate collectively into the extracellular matrix while preserving cell–cell junctions, forming patent structures that support blood flow. Although several signaling pathways have been identified as controlling sprouting, it remains unclear to what extent this process is mechanoregulated. To address this question, we investigated the role of cellular contractility in sprout morphogenesis, using a biomimetic model of angiogenesis. Three-dimensional maps of mechanical deformations generated by sprouts revealed that mainly leader cells, not stalk cells, exert contractile forces on the surrounding matrix. Surprisingly, inhibiting cellular contractility with blebbistatin did not affect the extent of cellular invasion but resulted in cell–cell dissociation primarily between tip and stalk cells. Closer examination of cell–cell junctions revealed that blebbistatin impaired adherens-junction organization, particularly between tip and stalk cells. Using CRISPR/Cas9-mediated gene editing, we further identified NMIIA as the major isoform responsible for regulating multicellularity and cell contractility during sprouting. Together, these studies reveal a critical role for NMIIA-mediated contractile forces in maintaining multicellularity during sprouting and highlight the central role of forces in regulating cell–cell adhesions during collective motility.
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Affiliation(s)
- Christine Yoon
- Biological Design Center, Department of Biomedical Engineering, Boston University, Boston, MA 02215
| | - Colin Choi
- Biological Design Center, Department of Biomedical Engineering, Boston University, Boston, MA 02215
| | - Sarah Stapleton
- Biological Design Center, Department of Biomedical Engineering, Boston University, Boston, MA 02215
| | - Teodelinda Mirabella
- Biological Design Center, Department of Biomedical Engineering, Boston University, Boston, MA 02215
| | - Caroline Howes
- Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180
| | - Li Dong
- Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180.,The Institute for Computational Engineering and Sciences, University of Texas at Austin, Austin, TX 78712
| | - Jessica King
- Biological Design Center, Department of Biomedical Engineering, Boston University, Boston, MA 02215
| | - Jinling Yang
- Biological Design Center, Department of Biomedical Engineering, Boston University, Boston, MA 02215
| | - Assad Oberai
- Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180.,Department of Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, CA 90007
| | - Jeroen Eyckmans
- Biological Design Center, Department of Biomedical Engineering, Boston University, Boston, MA 02215.,Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115
| | - Christopher S Chen
- Biological Design Center, Department of Biomedical Engineering, Boston University, Boston, MA 02215.,Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115
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19
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Cavallini F, Tarantola M. ECIS based wounding and reorganization of cardiomyocytes and fibroblasts in co-cultures. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2019; 144:116-127. [DOI: 10.1016/j.pbiomolbio.2018.06.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 06/22/2018] [Accepted: 06/26/2018] [Indexed: 12/11/2022]
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20
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Toyokawa Y, Takagi T, Uchiyama K, Mizushima K, Inoue K, Ushiroda C, Kashiwagi S, Nakano T, Hotta Y, Tanaka M, Dohi O, Okayama T, Yoshida N, Katada K, Kamada K, Ishikawa T, Handa O, Konishi H, Naito Y, Itoh Y. Ginsenoside Rb1 promotes intestinal epithelial wound healing through extracellular signal-regulated kinase and Rho signaling. J Gastroenterol Hepatol 2019; 34:1193-1200. [PMID: 30394577 DOI: 10.1111/jgh.14532] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 10/10/2018] [Accepted: 10/14/2018] [Indexed: 01/11/2023]
Abstract
BACKGROUND AND AIM Daikenchuto, a traditional Japanese herbal medicine, has been reported to exhibit anti-inflammatory effects against intestinal inflammation. However, whether daikenchuto has a therapeutic effect against intestinal mucosal injuries remains unclear. Thus, the aim of this study was to determine the effect of daikenchuto on intestinal mucosal healing. METHODS Colitis was induced in male Wistar rats by using trinitrobenzenesulfonic acid. Daikenchuto (900 mg/kg/day) was administered for 7 days after the induction of colitis. Thereafter, intestinal mucosal injuries were evaluated by determining the colonic epithelial regeneration ratio ([area of epithelial regeneration/area of ulcer] × 100). Restoration of rat intestinal epithelial cells treated with daikenchuto and its constituent herbs (Zanthoxylum fruit, processed ginger, and ginseng) and ginsenoside Rb1, which is a ginseng ingredient, was evaluated using a wound-healing assay. RESULTS The colon epithelial regeneration ratio in the daikenchuto-treated rats was significantly higher than that in the control rats. Daikenchuto, ginseng, and ginsenoside Rb1 enhanced wound healing, and the ginsenoside Rb1-induced enhancement was inhibited by extracellular signal-regulated kinase and Rho inhibitors. CONCLUSIONS Daikenchuto and its constituent, ginsenoside Rb1, promoted wound healing. Because mucosal healing is one of the most important therapeutic targets in patients with inflammatory bowel disease, ginsenoside Rb1 may be a novel therapeutic agent against intestinal mucosal damage such as that occurring in intestinal bowel disease.
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Affiliation(s)
- Yuki Toyokawa
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Tomohisa Takagi
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.,Department for Medical Innovation and Translational Medical Science, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kazuhiko Uchiyama
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Katsura Mizushima
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Ken Inoue
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Chihiro Ushiroda
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Saori Kashiwagi
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Takahiro Nakano
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yuma Hotta
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Makoto Tanaka
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Osamu Dohi
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Tetsuya Okayama
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Naohisa Yoshida
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kazuhiro Katada
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kazuhiro Kamada
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Takeshi Ishikawa
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Osamu Handa
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hideyuki Konishi
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yuji Naito
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yoshito Itoh
- Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
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21
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Blin G, Wisniewski D, Picart C, Thery M, Puceat M, Lowell S. Geometrical confinement controls the asymmetric patterning of brachyury in cultures of pluripotent cells. Development 2018; 145:dev166025. [PMID: 30115626 PMCID: PMC6176930 DOI: 10.1242/dev.166025] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Accepted: 07/30/2018] [Indexed: 01/02/2023]
Abstract
Diffusible signals are known to orchestrate patterning during embryogenesis, yet diffusion is sensitive to noise. The fact that embryogenesis is remarkably robust suggests that additional layers of regulation reinforce patterning. Here, we demonstrate that geometrical confinement orchestrates the spatial organisation of initially randomly positioned subpopulations of spontaneously differentiating mouse embryonic stem cells. We use micropatterning in combination with pharmacological manipulations and quantitative imaging to dissociate the multiple effects of geometry. We show that the positioning of a pre-streak-like population marked by brachyury (T) is decoupled from the size of its population, and that breaking radial symmetry of patterns imposes polarised patterning. We provide evidence for a model in which the overall level of diffusible signals together with the history of the cell culture define the number of T+ cells, whereas geometrical constraints guide patterning in a multi-step process involving a differential response of the cells to multicellular spatial organisation. Our work provides a framework for investigating robustness of patterning and provides insights into how to guide symmetry-breaking events in aggregates of pluripotent cells.
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Affiliation(s)
- Guillaume Blin
- MRC Centre for Regenerative Medicine, Institute for Stem Cell Research, School of Biological Sciences, University of Edinburgh, Edinburgh, EH16 4UU, UK
| | - Darren Wisniewski
- MRC Centre for Regenerative Medicine, Institute for Stem Cell Research, School of Biological Sciences, University of Edinburgh, Edinburgh, EH16 4UU, UK
| | - Catherine Picart
- MRC Centre for Regenerative Medicine, Institute for Stem Cell Research, School of Biological Sciences, University of Edinburgh, Edinburgh, EH16 4UU, UK
| | - Manuel Thery
- Univ. Grenoble-Alpes, CEA, CNRS, INRA, Biosciences and Biotechnology Institute of Grenoble, Laboratoire de Physiologie Cellulaire and Végétale, UMR5168, CytoMorpho Lab, 38054 Grenoble, France
- Univ. Paris Diderot, CEA, INSERM, Hôpital Saint Louis, Institut Universitaire d'Hematologie, UMRS1160, CytoMorpho Lab, 75010 Paris, France
| | - Michel Puceat
- INSERM U1251, Université Aix-Marseille, MMG, 13885 Marseille, France
| | - Sally Lowell
- MRC Centre for Regenerative Medicine, Institute for Stem Cell Research, School of Biological Sciences, University of Edinburgh, Edinburgh, EH16 4UU, UK
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22
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Vishwakarma M, Di Russo J, Probst D, Schwarz US, Das T, Spatz JP. Mechanical interactions among followers determine the emergence of leaders in migrating epithelial cell collectives. Nat Commun 2018; 9:3469. [PMID: 30150695 PMCID: PMC6110746 DOI: 10.1038/s41467-018-05927-6] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 07/23/2018] [Indexed: 01/14/2023] Open
Abstract
Regulating the emergence of leaders is a central aspect of collective cell migration, but the underlying mechanisms remain ambiguous. Here we show that the selective emergence of leader cells at the epithelial wound-margin depends on the dynamics of the follower cells and is spatially limited by the length-scale of collective force transduction. Owing to the dynamic heterogeneity of the monolayer, cells behind the prospective leaders manifest locally increased traction and monolayer stresses much before these leaders display any phenotypic traits. Followers, in turn, pull on the future leaders to elect them to their fate. Once formed, the territory of a leader can extend only to the length up-to which forces are correlated, which is similar to the length up-to which leader cells can transmit forces. These findings provide mechanobiological insight into the hierarchy in cell collectives during epithelial wound healing. During collective cell migration, how leader cells emerge is poorly understood. Here, the authors find that small groups of mechanically-interacting follower cells pull on the future leaders to stochastically elect them to their fate.
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Affiliation(s)
- Medhavi Vishwakarma
- Department of Cellular Biophysics, Max Planck Institute for Medical Research, Jahnstraße 29, 69120, Heidelberg, Germany.,Department of Biophysical Chemistry, Heidelberg University, INF 253, 69120, Heidelberg, Germany
| | - Jacopo Di Russo
- Department of Cellular Biophysics, Max Planck Institute for Medical Research, Jahnstraße 29, 69120, Heidelberg, Germany.,Department of Biophysical Chemistry, Heidelberg University, INF 253, 69120, Heidelberg, Germany
| | - Dimitri Probst
- Institute for Theoretical Physics and BioQuant, Heidelberg University, INF 267, 69120, Heidelberg, Germany
| | - Ulrich S Schwarz
- Institute for Theoretical Physics and BioQuant, Heidelberg University, INF 267, 69120, Heidelberg, Germany
| | - Tamal Das
- Department of Cellular Biophysics, Max Planck Institute for Medical Research, Jahnstraße 29, 69120, Heidelberg, Germany. .,Department of Biophysical Chemistry, Heidelberg University, INF 253, 69120, Heidelberg, Germany. .,TIFR Centre for Interdisciplinary Sciences (TCIS), Tata Institute of Fundamental Research Hyderabad, 500107, Hyderabad, India.
| | - Joachim P Spatz
- Department of Cellular Biophysics, Max Planck Institute for Medical Research, Jahnstraße 29, 69120, Heidelberg, Germany. .,Department of Biophysical Chemistry, Heidelberg University, INF 253, 69120, Heidelberg, Germany.
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23
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Abstract
Epithelial cells demonstrate different collective migratory modes when encountering two (2D) and three dimensional (3D) microenvironment. While planar micropatterns and constraint have been shown to strongly impact collective cell migration (CCM), how out-of-plane curvature and 3D confinement will affect epithelial organization and dynamics remains largely unknown. This is likely due to lack of proper 3D microscaffolds for studying CCM. In this chapter, we briefly review the latest achievement in microengineering approaches to control 3D microenvironment of epithelial development. Then, we introduce convenient and simple methods of fabricating elastomeric tubular biocompatible microchannels as 3D cell culture scaffolds. Afterwards, we describe in detail the experimental set-up for observing 3D coordinated cell migration on curved surfaces and under spatial constraint. Finally, we provide an approach to analyze 3D dynamics using available techniques for 2D images.
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24
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Photoactivatable substrates for systematic study of the impact of an extracellular matrix ligand on appearance of leader cells in collective cell migration. Biomaterials 2018; 169:72-84. [PMID: 29655082 DOI: 10.1016/j.biomaterials.2018.03.045] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 03/25/2018] [Accepted: 03/26/2018] [Indexed: 11/24/2022]
Abstract
Epithelial cells migrate as multicellular units. The directionality and speed of these units are determined by actively moving leader cells. It is important to understand how external cues affect the appearance of these leader cells in physiological and pathological processes. However, the impact of extracellular matrices (ECMs) is still controversial, because physically-adsorbed ECM proteins are amenable to protein remodeling, and uncontrolled cluster geometry can vary migration phenotypes. Here, we demonstrate a photoactivatable substrate, which we used to study the impact of a cyclic Arg-Gly-Asp (cRGD) ligand on leader cell formation in MDCK cells. This robust platform allowed us to investigate the effect of cRGD density on leader cell formation, in any given cluster geometry, with minimized ECM remodeling. Our results show a biphasic response of leader cell appearance upon reducing the surface cRGD density. The increase, in leader cell appearance, within the higher density range, is not only associated with the weakening of circumferential actomyosin belts, but also reduction of cellular mechanical tension and intercellular junctional E-cadherin. These results indicate that cRGD-mediated cell-ECM interactions positively regulate mechanical and biochemical coupling within cell clusters; both are critical for the coordination of cell collectives and eventual reduction in the appearance of leader cells.
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Horii Y, Uchiyama K, Toyokawa Y, Hotta Y, Tanaka M, Yasukawa Z, Tokunaga M, Okubo T, Mizushima K, Higashimura Y, Dohi O, Okayama T, Yoshida N, Katada K, Kamada K, Handa O, Ishikawa T, Takagi T, Konishi H, Naito Y, Itoh Y. Partially hydrolyzed guar gum enhances colonic epithelial wound healing via activation of RhoA and ERK1/2. Food Funct 2018; 7:3176-83. [PMID: 27305660 DOI: 10.1039/c6fo00177g] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND AIMS Healing of the intestinal mucosal epithelium was found to be a critical factor in the treatment of inflammatory bowel disease (IBD). In this study, we provide further evidence that partially hydrolyzed dietary fiber (PHGG) enhances colonic epithelial cell wound healing, and partially characterize the mechanism that governs this process. MATERIALS AND METHODS Young adult mouse colonic (YAMC) epithelial cells were scraped with a 10 μl micro-pipette tip to denude a round of the monolayer and were incubated with PHGG. The area of cell migration was measured using Image J software. Meanwhile, Rho activation assays were utilized to monitor Rho activation levels. To assess in vivo effects, C57B6 mice were treated with DSS for 7 days and then provided food supplemented with PHGG for 8 days. RESULTS YAMC cells treated with PHGG exhibited significantly enhanced wound healing compared to the control cells; however, this enhancement was inhibited by both Y-27632 (RhoA inhibitor) and U0126 (ERK1/2 inhibitor). Likewise, there was a PHGG-dependent increase in F-actin accumulation and Rho kinase activity that was blocked by U0126. Meanwhile, PHGG-dependent ERK1/2 activity was not inhibited by Y-27632. In the DSS-induced mouse colitis model, animals that received food supplemented with PHGG exhibited significant recovery of the colonic mucosa. CONCLUSIONS In this study, we demonstrate that PHGG promotes colonic epithelial cell wound healing via activation of RhoA, which occurs downstream of ERK1/2 activation. These findings indicate that PHGG could be utilized as a therapeutic agent for patients with intestinal mucosal damage such as those with IBD.
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Affiliation(s)
- Yusuke Horii
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Kazuhiko Uchiyama
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Yuki Toyokawa
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Yuma Hotta
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Makoto Tanaka
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Zenta Yasukawa
- Nutrition Division, Taiyo Kagaku Co. Ltd, Yokkaichi, Mie, Japan
| | - Makoto Tokunaga
- Nutrition Division, Taiyo Kagaku Co. Ltd, Yokkaichi, Mie, Japan
| | - Tsutomu Okubo
- Nutrition Division, Taiyo Kagaku Co. Ltd, Yokkaichi, Mie, Japan
| | - Katsura Mizushima
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Yasuki Higashimura
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Osamu Dohi
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Tetsuya Okayama
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Naohisa Yoshida
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Kazuhiro Katada
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Kazuhiro Kamada
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Osamu Handa
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Takeshi Ishikawa
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Tomohisa Takagi
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Hideyuki Konishi
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Yuji Naito
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Yoshito Itoh
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, 465 Kajiicho Hirokoji Kawaramachidori, Kamigyo-ku, Kyoto 602-8566, Japan.
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Suffoletto K, Jetta D, Hua SZ. E-cadherin mediated lateral interactions between neighbor cells necessary for collective migration. J Biomech 2018; 71:159-166. [PMID: 29486895 DOI: 10.1016/j.jbiomech.2018.02.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 01/22/2018] [Accepted: 02/01/2018] [Indexed: 12/19/2022]
Abstract
Collective cell movement is critical in pathological processes such as wound healing and cancer invasion. It entails complex interactions between adjacent cells and between cells-extracellular matrices. Most studies measure the migration patterns and force propagation by placing cells on flat, patterned substrates. The cooperative behavior resulting from cell-cell interactions is not well understood. We have developed a multi-channel microfluidic device that has junctional protein E-cadherin coated onto the sidewalls of the channels that enables the cells' lateral interactions with their neighbors to be studied. Our study reveals that epithelial cells rely on lateral E-cadherin-based adhesions to maintain the cohesion of the group. Cells move faster in narrower channels, but the average velocity along the channels is reduced in E-cadherin coated channels versus non-adhesive channels. We have directly measured the forces in the cross-linking protein, alpha-actinin, using FRET sensors during cell migration, and found that higher tension exists at the cell edges adjacent to the walls coated with E-cadherin, the implication being E-cadherin transmits the shear forces but does not provide a driving force for this migration.
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Affiliation(s)
- Kevin Suffoletto
- Department of Mechanical and Aerospace Engineering, SUNY-Buffalo, Buffalo, NY 14260, USA
| | - Deekshitha Jetta
- Department of Mechanical and Aerospace Engineering, SUNY-Buffalo, Buffalo, NY 14260, USA
| | - Susan Z Hua
- Department of Mechanical and Aerospace Engineering, SUNY-Buffalo, Buffalo, NY 14260, USA; Department of Physiology and Biophysics, SUNY-Buffalo, Buffalo, NY 14260, USA.
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Laurent J, Blin G, Chatelain F, Vanneaux V, Fuchs A, Larghero J, Théry M. Convergence of microengineering and cellular self-organization towards functional tissue manufacturing. Nat Biomed Eng 2017; 1:939-956. [DOI: 10.1038/s41551-017-0166-x] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 11/07/2017] [Indexed: 12/18/2022]
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Sonavane PR, Wang C, Dzamba B, Weber GF, Periasamy A, DeSimone DW. Mechanical and signaling roles for keratin intermediate filaments in the assembly and morphogenesis of Xenopus mesendoderm tissue at gastrulation. Development 2017; 144:4363-4376. [PMID: 28982683 PMCID: PMC5769636 DOI: 10.1242/dev.155200] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 09/25/2017] [Indexed: 12/21/2022]
Abstract
The coordination of individual cell behaviors is a crucial step in the assembly and morphogenesis of tissues. Xenopus mesendoderm cells migrate collectively along a fibronectin (FN) substrate at gastrulation, but how the adhesive and mechanical forces required for these movements are generated and transmitted is unclear. Traction force microscopy (TFM) was used to establish that traction stresses are limited primarily to leading edge cells in mesendoderm explants, and that these forces are balanced by intercellular stresses in follower rows. This is further reflected in the morphology of these cells, with broad lamellipodial protrusions, mature focal adhesions and a gradient of activated Rac1 evident at the leading edge, while small protrusions, rapid turnover of immature focal adhesions and lack of a Rac1 activity gradient characterize cells in following rows. Depletion of keratin (krt8) with antisense morpholinos results in high traction stresses in follower row cells, misdirected protrusions and the formation of actin stress fibers anchored in streak-like focal adhesions. We propose that maintenance of mechanical integrity in the mesendoderm by keratin intermediate filaments is required to balance stresses within the tissue to regulate collective cell movements.
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Affiliation(s)
- Pooja R Sonavane
- Department of Cell Biology, School of Medicine, University of Virginia Health System, P.O. Box 800732, Charlottesville, VA 22908, USA
| | - Chong Wang
- Department of Cell Biology, School of Medicine, University of Virginia Health System, P.O. Box 800732, Charlottesville, VA 22908, USA
| | - Bette Dzamba
- Department of Cell Biology, School of Medicine, University of Virginia Health System, P.O. Box 800732, Charlottesville, VA 22908, USA
| | - Gregory F Weber
- Department of Cell Biology, School of Medicine, University of Virginia Health System, P.O. Box 800732, Charlottesville, VA 22908, USA
| | - Ammasi Periasamy
- Keck Center for Cellular Imaging, Department of Biology, University of Virginia, Charlottesville, VA 22903, USA
| | - Douglas W DeSimone
- Department of Cell Biology, School of Medicine, University of Virginia Health System, P.O. Box 800732, Charlottesville, VA 22908, USA
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29
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Xi W, Sonam S, Beng Saw T, Ladoux B, Teck Lim C. Emergent patterns of collective cell migration under tubular confinement. Nat Commun 2017; 8:1517. [PMID: 29142242 PMCID: PMC5688140 DOI: 10.1038/s41467-017-01390-x] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 09/14/2017] [Indexed: 02/07/2023] Open
Abstract
Collective epithelial behaviors are essential for the development of lumens in organs. However, conventional assays of planar systems fail to replicate cell cohorts of tubular structures that advance in concerted ways on out-of-plane curved and confined surfaces, such as ductal elongation in vivo. Here, we mimic such coordinated tissue migration by forming lumens of epithelial cell sheets inside microtubes of 1-10 cell lengths in diameter. We show that these cell tubes reproduce the physiological apical-basal polarity, and have actin alignment, cell orientation, tissue organization, and migration modes that depend on the extent of tubular confinement and/or curvature. In contrast to flat constraint, the cell sheets in a highly constricted smaller microtube demonstrate slow motion with periodic relaxation, but fast overall movement in large microtubes. Altogether, our findings provide insights into the emerging migratory modes for epithelial migration and growth under tubular confinement, which are reminiscent of the in vivo scenario.
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Affiliation(s)
- Wang Xi
- Mechanobiology Institute, National University of Singapore, 5A Engineering Drive 1, Singapore, 117411, Singapore
- Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, Singapore, 117546, Singapore
| | - Surabhi Sonam
- Mechanobiology Institute, National University of Singapore, 5A Engineering Drive 1, Singapore, 117411, Singapore
- Department of Biomedical Engineering and Department of Mechanical Engineering, National University of Singapore, Singapore, 117575, Singapore
- Institut Jacques Monod, Université Paris Diderot & CNRS UMR 7592, 75205, Paris cedex 13, France
| | - Thuan Beng Saw
- Mechanobiology Institute, National University of Singapore, 5A Engineering Drive 1, Singapore, 117411, Singapore
- NUS Graduate School of Integrative Sciences and Engineering, National University of Singapore, Singapore, 117456, Singapore
| | - Benoit Ladoux
- Mechanobiology Institute, National University of Singapore, 5A Engineering Drive 1, Singapore, 117411, Singapore.
- Institut Jacques Monod, Université Paris Diderot & CNRS UMR 7592, 75205, Paris cedex 13, France.
| | - Chwee Teck Lim
- Mechanobiology Institute, National University of Singapore, 5A Engineering Drive 1, Singapore, 117411, Singapore.
- Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, Singapore, 117546, Singapore.
- Department of Biomedical Engineering and Department of Mechanical Engineering, National University of Singapore, Singapore, 117575, Singapore.
- NUS Graduate School of Integrative Sciences and Engineering, National University of Singapore, Singapore, 117456, Singapore.
- Biomedical Institute for Global Health Research and Technology, National University of Singapore, #14-01, MD6, 14 Medical Drive, Singapore, 117599, Singapore.
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Venhuizen JH, Zegers MM. Making Heads or Tails of It: Cell-Cell Adhesion in Cellular and Supracellular Polarity in Collective Migration. Cold Spring Harb Perspect Biol 2017; 9:cshperspect.a027854. [PMID: 28246177 DOI: 10.1101/cshperspect.a027854] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Collective cell migration is paramount to morphogenesis and contributes to the pathogenesis of cancer. To migrate directionally and reach their site of destination, migrating cells must distinguish a front and a rear. In addition to polarizing individually, cell-cell interactions in collectively migrating cells give rise to a higher order of polarity, which allows them to move as a supracellular unit. Rather than just conferring adhesion, emerging evidence indicates that cadherin-based adherens junctions intrinsically polarize the cluster and relay mechanical signals to establish both intracellular and supracellular polarity. In this review, we discuss the various functions of adherens junctions in polarity of migrating cohorts.
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Affiliation(s)
- Jan-Hendrik Venhuizen
- Department of Cell Biology, Radboud Institute for Molecular Life Sciences, 6525 GA Nijmegen, The Netherlands
| | - Mirjam M Zegers
- Department of Cell Biology, Radboud Institute for Molecular Life Sciences, 6525 GA Nijmegen, The Netherlands
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32
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Multilayered membranes with tuned well arrays to be used as regenerative patches. Acta Biomater 2017; 57:313-323. [PMID: 28438703 DOI: 10.1016/j.actbio.2017.04.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 04/13/2017] [Accepted: 04/19/2017] [Indexed: 11/20/2022]
Abstract
Membranes have been explored as patches in tissue repair and regeneration, most of them presenting a flat geometry or a patterned texture at the nano/micrometer scale. Herein, a new concept of a flexible membrane featuring well arrays forming pore-like environments to accommodate cell culture is proposed. The processing of such membranes using polysaccharides is based on the production of multilayers using the layer-by-layer methodology over a patterned PDMS substrate. The detached multilayered membrane exhibits a layer of open pores at one side and a total thickness of 38±2.2µm. The photolithography technology used to produce the molds allows obtaining wells on the final membranes with a tuned shape and micro-scale precision. The influence of post-processing procedures over chitosan/alginate films with 100 double layers, including crosslinking with genipin or fibronectin immobilization, on the adhesion and proliferation of human osteoblast-like cells is also investigated. The results suggest that the presence of patterned wells affects positively cell adhesion, morphology and proliferation. In particular, it is seen that cells colonized preferentially the well regions. The geometrical features with micro to sub-millimeter patterned wells, together with the nano-scale organization of the polymeric components along the thickness of the film will allow to engineer highly versatile multilayered membranes exhibiting a pore-like microstructure in just one of the sides, that could be adaptable in the regeneration of multiple tissues. STATEMENT OF SIGNIFICANCE Flexible multilayered membranes containing multiple micro-reservoirs are found as potential regenerative patches. Layer-by-layer (LbL) methodology over a featured PDMS substrate is used to produce patterned membranes, composed only by natural-based polymers, that can be easily detached from the PDMS substrate. The combination of nano-scale control of the polymeric organization along the thickness of the chitosan/alginate (CHT/ALG) membranes, provided by LbL, together with the geometrical micro-scale features of the patterned membranes offers a uniqueness system that allows cells to colonize 3-dimensionally. This study provides a promising strategy to control cellular spatial organization that can face the region of the tissue to regenerate.
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Hakim V, Silberzan P. Collective cell migration: a physics perspective. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2017; 80:076601. [PMID: 28282028 DOI: 10.1088/1361-6633/aa65ef] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Cells have traditionally been viewed either as independently moving entities or as somewhat static parts of tissues. However, it is now clear that in many cases, multiple cells coordinate their motions and move as collective entities. Well-studied examples comprise development events, as well as physiological and pathological situations. Different ex vivo model systems have also been investigated. Several recent advances have taken place at the interface between biology and physics, and have benefitted from progress in imaging and microscopy, from the use of microfabrication techniques, as well as from the introduction of quantitative tools and models. We review these interesting developments in quantitative cell biology that also provide rich examples of collective out-of-equilibrium motion.
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Affiliation(s)
- Vincent Hakim
- Laboratoire de Physique Statistique, Ecole Normale Supérieure, CNRS, PSL Research University, UPMC, Paris, France
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34
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Martin KC, Yuan X, Stimac G, Bannerman K, Anderson J, Roy C, Glykofrydis F, Yin H, Davies JA. Symmetry-breaking in branching epithelia: cells on micro-patterns under flow challenge the hypothesis of positive feedback by a secreted autocrine inhibitor of motility. J Anat 2017; 230:766-774. [PMID: 28369863 PMCID: PMC5442143 DOI: 10.1111/joa.12599] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/16/2017] [Indexed: 01/21/2023] Open
Abstract
Branching morphogenesis of epithelia involves division of cells into leader (tip) and follower (stalk) cells. Published work on cell lines in culture has suggested that symmetry-breaking takes place via a secreted autocrine inhibitor of motility, the inhibitor accumulating more in concave regions of the culture boundary, slowing advance of cells there, and less in convex areas, allowing advance and a further exaggeration of the concave/convex difference. Here we test this hypothesis using a two-dimensional culture system that includes strong flow conditions to remove accumulating diffusible secretions. We find that, while motility does indeed follow boundary curvature in this system, flow makes no difference: this challenges the hypothesis of control by a diffusible secreted autocrine inhibitor.
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Affiliation(s)
- Kimberly C. Martin
- Centre for Integrative PhysiologyUniversity of EdinburghGeorge SquareEdinburghEH8 9XBUK
| | - Xiaofei Yuan
- School of EngineeringJames Watt BuildingUniversity of GlasgowGL12 8QQUK
| | - Gregory Stimac
- Centre for Integrative PhysiologyUniversity of EdinburghGeorge SquareEdinburghEH8 9XBUK
| | - Kieran Bannerman
- Centre for Integrative PhysiologyUniversity of EdinburghGeorge SquareEdinburghEH8 9XBUK
| | - Jamie Anderson
- Centre for Integrative PhysiologyUniversity of EdinburghGeorge SquareEdinburghEH8 9XBUK
| | - Chloe Roy
- Centre for Integrative PhysiologyUniversity of EdinburghGeorge SquareEdinburghEH8 9XBUK
| | - Fokion Glykofrydis
- Centre for Integrative PhysiologyUniversity of EdinburghGeorge SquareEdinburghEH8 9XBUK
| | - Huabing Yin
- School of EngineeringJames Watt BuildingUniversity of GlasgowGL12 8QQUK
| | - Jamie A. Davies
- Centre for Integrative PhysiologyUniversity of EdinburghGeorge SquareEdinburghEH8 9XBUK
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Piotrowski-Daspit AS, Tien J, Nelson CM. Interstitial fluid pressure regulates collective invasion in engineered human breast tumors via Snail, vimentin, and E-cadherin. Integr Biol (Camb) 2016; 8:319-31. [PMID: 26853861 DOI: 10.1039/c5ib00282f] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Many solid tumors exhibit elevated interstitial fluid pressure (IFP). This elevated pressure within the core of the tumor results in outward flow of interstitial fluid to the tumor periphery. We previously found that the directionality of IFP gradients modulates collective invasion from the surface of patterned three-dimensional (3D) aggregates of MDA-MB-231 human breast cancer cells. Here, we used this 3D engineered tumor model to investigate the molecular mechanisms underlying IFP-induced changes in invasive phenotype. We found that IFP alters the expression of genes associated with epithelial-mesenchymal transition (EMT). Specifically, the levels of Snail, vimentin, and E-cadherin were increased under pressure conditions that promoted collective invasion. These changes in gene expression were sufficient to direct collective invasion in response to IFP. Furthermore, we found that IFP modulates the motility and persistence of individual cells within the aggregates, which are also influenced by the expression levels of EMT markers. Together, these data provide insight into the molecular mechanisms that guide collective invasion from primary tumors in response to IFP.
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Affiliation(s)
- Alexandra S Piotrowski-Daspit
- Department of Chemical & Biological Engineering, Princeton University, 303 Hoyt Laboratory, William Street, Princeton, NJ 08544, USA.
| | - Joe Tien
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA and Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA
| | - Celeste M Nelson
- Department of Chemical & Biological Engineering, Princeton University, 303 Hoyt Laboratory, William Street, Princeton, NJ 08544, USA. and Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
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36
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Albert PJ, Schwarz US. Modeling cell shape and dynamics on micropatterns. Cell Adh Migr 2016; 10:516-528. [PMID: 26838278 PMCID: PMC5079397 DOI: 10.1080/19336918.2016.1148864] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 01/26/2016] [Indexed: 12/29/2022] Open
Abstract
Adhesive micropatterns have become a standard tool to study cells under defined conditions. Applications range from controlling the differentiation and fate of single cells to guiding the collective migration of cell sheets. In long-term experiments, single cell normalization is challenged by cell division. For all of these setups, mathematical models predicting cell shape and dynamics can guide pattern design. Here we review recent advances in predicting and explaining cell shape, traction forces and dynamics on micropatterns. Starting with contour models as the simplest approach to explain concave cell shapes, we move on to network and continuum descriptions as examples for static models. To describe dynamic processes, cellular Potts, vertex and phase field models can be used. Different types of model are appropriate to address different biological questions and together, they provide a versatile tool box to predict cell behavior on micropatterns.
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Affiliation(s)
- Philipp J. Albert
- Institute for Theoretical Physics and BioQuant, Heidelberg University, Heidelberg, Germany
| | - Ulrich S. Schwarz
- Institute for Theoretical Physics and BioQuant, Heidelberg University, Heidelberg, Germany
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Nitric oxide promotes epidermal stem cell migration via cGMP-Rho GTPase signalling. Sci Rep 2016; 6:30687. [PMID: 27469024 PMCID: PMC4965828 DOI: 10.1038/srep30687] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 06/27/2016] [Indexed: 01/05/2023] Open
Abstract
The migration and reepithelization of epidermal stem cells (ESCs) are the most critical processes in wound healing. The gaseous messenger nitric oxide (NO) has multiple biological effects, but its actions on ESCs are poorly understood. In this study, an NO donor, S-nitroso-N-acetylpenicillamine (SNAP), was found to facilitate the in vitro migration of human ESCs (huESCs) in both live-imaging and scratch models. In addition, pull-down assays demonstrated that SNAP could activate the small GTPases RhoA and Rac1 of the Rho family, but not Cdc42. Moreover, the effects of SNAP on the migration and F-actin polymerization of ESCs could be blocked by inhibitors of cGMP, PKG, RhoA or Rac1, and by a specific siRNA of RhoA or Rac1, but not by a Cdc42 inhibitor or siRNA. Furthermore, the roles of NO in ESC migration via cGMP-Rho GTPase signalling in vivo were confirmed by tracing 5-bromo-2-deoxyuridine (BrdU)-labelled cells in a superficial, partial-thickness scald mouse model. Thus, the present study demonstrated that the NO donor SNAP could promote huESC migration in vitro. Furthermore, NO was found to induce ESC migration via cGMP-Rho GTPase RhoA and Rac1 signalling, but not Cdc42 signalling, both in vivo and in vitro.
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Begnaud S, Chen T, Delacour D, Mège RM, Ladoux B. Mechanics of epithelial tissues during gap closure. Curr Opin Cell Biol 2016; 42:52-62. [PMID: 27131272 DOI: 10.1016/j.ceb.2016.04.006] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 04/06/2016] [Accepted: 04/08/2016] [Indexed: 12/15/2022]
Abstract
The closure of gaps is crucial to maintaining epithelium integrity during developmental and repair processes such as dorsal closure and wound healing. Depending on biochemical as well as physical properties of the microenvironment, gap closure occurs through assembly of multicellular actin-based contractile cables and/or protrusive activity of cells lining the gap. This review discusses the relative contributions of 'purse-string' and cell crawling mechanisms regulated by cell-substrate and cell-cell interactions, cellular mechanics and physical constraints from the environment.
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Affiliation(s)
- Simon Begnaud
- Institut Jacques Monod (IJM), CNRS UMR 7592 & University Paris Diderot, Paris, France
| | - Tianchi Chen
- Mechanobiology Institute (MBI), National University of Singapore, Singapore
| | - Delphine Delacour
- Institut Jacques Monod (IJM), CNRS UMR 7592 & University Paris Diderot, Paris, France
| | - René-Marc Mège
- Institut Jacques Monod (IJM), CNRS UMR 7592 & University Paris Diderot, Paris, France.
| | - Benoît Ladoux
- Institut Jacques Monod (IJM), CNRS UMR 7592 & University Paris Diderot, Paris, France; Mechanobiology Institute (MBI), National University of Singapore, Singapore.
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Kollimada SA, Kulkarni AH, Ravan A, Gundiah N. Advancing Edge Speeds of Epithelial Monolayers Depend on Their Initial Confining Geometry. PLoS One 2016; 11:e0153471. [PMID: 27078632 PMCID: PMC4831833 DOI: 10.1371/journal.pone.0153471] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Accepted: 03/30/2016] [Indexed: 02/04/2023] Open
Abstract
Collective cell migrations are essential in several physiological processes and are driven by both chemical and mechanical cues. The roles of substrate stiffness and confinement on collective migrations have been investigated in recent years, however few studies have addressed how geometric shapes influence collective cell migrations. Here, we address the hypothesis that the relative position of a cell within the confinement influences its motility. Monolayers of two types of epithelial cells--MCF7, a breast epithelial cancer cell line, and MDCK, a control epithelial cell line--were confined within circular, square, and cross-shaped stencils and their migration velocities were quantified upon release of the constraint using particle image velocimetry. The choice of stencil geometry allowed us to investigate individual cell motility within convex, straight and concave boundaries. Cells located in sharp, convex boundaries migrated at slower rates than those in concave or straight edges in both cell types. The overall cluster migration occurred in three phases: an initial linear increase with time, followed by a plateau region and a subsequent decrease in cluster speeds. An acto-myosin contractile ring, present in the MDCK but absent in MCF7 monolayer, was a prominent feature in the emergence of leader cells from the MDCK clusters which occurred every ~125 μm from the vertex of the cross. Further, coordinated cell movements displayed vorticity patterns in MDCK which were absent in MCF7 clusters. We also used cytoskeletal inhibitors to show the importance of acto-myosin bounding cables in collective migrations through translation of local movements to create long range coordinated movements and the creation of leader cells within ensembles. To our knowledge, this is the first demonstration of how bounding shapes influence long-term migratory behaviours of epithelial cell monolayers. These results are important for tissue engineering and may also enhance our understanding of cell movements during developmental patterning and cancer metastasis.
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Affiliation(s)
- Somanna A. Kollimada
- Department of Mechanical Engineering, Indian Institute of Science, Bangalore, India
| | - Ankur H. Kulkarni
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore, India
| | - Aniket Ravan
- Department of Mechanical Engineering, Indian Institute of Science, Bangalore, India
| | - Namrata Gundiah
- Department of Mechanical Engineering, Indian Institute of Science, Bangalore, India
- * E-mail: ;
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40
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Albert PJ, Schwarz US. Dynamics of Cell Ensembles on Adhesive Micropatterns: Bridging the Gap between Single Cell Spreading and Collective Cell Migration. PLoS Comput Biol 2016; 12:e1004863. [PMID: 27054883 PMCID: PMC4824460 DOI: 10.1371/journal.pcbi.1004863] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 03/11/2016] [Indexed: 12/20/2022] Open
Abstract
The collective dynamics of multicellular systems arise from the interplay of a few fundamental elements: growth, division and apoptosis of single cells; their mechanical and adhesive interactions with neighboring cells and the extracellular matrix; and the tendency of polarized cells to move. Micropatterned substrates are increasingly used to dissect the relative roles of these fundamental processes and to control the resulting dynamics. Here we show that a unifying computational framework based on the cellular Potts model can describe the experimentally observed cell dynamics over all relevant length scales. For single cells, the model correctly predicts the statistical distribution of the orientation of the cell division axis as well as the final organisation of the two daughters on a large range of micropatterns, including those situations in which a stable configuration is not achieved and rotation ensues. Large ensembles migrating in heterogeneous environments form non-adhesive regions of inward-curved arcs like in epithelial bridge formation. Collective migration leads to swirl formation with variations in cell area as observed experimentally. In each case, we also use our model to predict cell dynamics on patterns that have not been studied before.
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Affiliation(s)
- Philipp J. Albert
- Institute for Theoretical Physics and BioQuant, Heidelberg University, Heidelberg, Germany
| | - Ulrich S. Schwarz
- Institute for Theoretical Physics and BioQuant, Heidelberg University, Heidelberg, Germany
- * E-mail:
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41
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Probing Leader Cells in Endothelial Collective Migration by Plasma Lithography Geometric Confinement. Sci Rep 2016; 6:22707. [PMID: 26936382 PMCID: PMC4776176 DOI: 10.1038/srep22707] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 02/18/2016] [Indexed: 12/31/2022] Open
Abstract
When blood vessels are injured, leader cells emerge in the endothelium to heal the wound and restore the vasculature integrity. The characteristics of leader cells during endothelial collective migration under diverse physiological conditions, however, are poorly understood. Here we investigate the regulation and function of endothelial leader cells by plasma lithography geometric confinement generated. Endothelial leader cells display an aggressive phenotype, connect to follower cells via peripheral actin cables and discontinuous adherens junctions, and lead migrating clusters near the leading edge. Time-lapse microscopy, immunostaining, and particle image velocimetry reveal that the density of leader cells and the speed of migrating clusters are tightly regulated in a wide range of geometric patterns. By challenging the cells with converging, diverging and competing patterns, we show that the density of leader cells correlates with the size and coherence of the migrating clusters. Collectively, our data provide evidence that leader cells control endothelial collective migration by regualting the migrating clusters.
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42
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Serbo JV, Kuo S, Lewis S, Lehmann M, Li J, Gracias DH, Romer LH. Patterning of Fibroblast and Matrix Anisotropy within 3D Confinement is Driven by the Cytoskeleton. Adv Healthc Mater 2016; 5:146-58. [PMID: 26033825 PMCID: PMC5817161 DOI: 10.1002/adhm.201500030] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 05/12/2015] [Indexed: 12/16/2022]
Abstract
Effects of 3D confinement on cellular growth and matrix assembly are important in tissue engineering, developmental biology, and regenerative medicine. Polydimethylsiloxane wells with varying anisotropy are microfabicated using soft-lithography. Microcontact printing of bovine serum albumin is used to block cell adhesion to surfaces between wells. The orientations of fibroblast stress fibers, microtubules, and fibronectin fibrils are examined 1 day after cell seeding using laser scanning confocal microscopy, and anisotropy is quantified using a custom autocorrelation analysis. Actin, microtubules, and fibronectin exhibit higher anisotropy coefficients for cells grown in rectangular wells with aspect ratios of 1:4 and 1:8, as compared to those in wells with lower aspect ratios or in square wells. The effects of disabling individual cytoskeletal components on fibroblast responses to anisotropy are then tested by applying actin or microtubule polymerization inhibitors, Rho kinase inhibitor, or by siRNA-mediated knockdown of AXL or cofilin-1. Latrunculin A decreases cytoskeletal and matrix anisotropy, nocodazole ablates both, and Y27632 mutes cellular polarity while decreasing matrix anisotropy. AXL siRNA knockdown has little effect, as does siRNA knockdown of cofilin-1. These data identify several specific cytoskeletal strategies as targets for the manipulation of anisotropy in 3D tissue constructs.
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Affiliation(s)
- Janna V. Serbo
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Scot Kuo
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Shawna Lewis
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Matthew Lehmann
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Jiuru Li
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - David H. Gracias
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, USA
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Lewis H. Romer
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Center for Cell Dynamics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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Albert PJ, Schwarz US. Optimizing micropattern geometries for cell shape and migration with genetic algorithms. Integr Biol (Camb) 2016; 8:741-50. [DOI: 10.1039/c6ib00061d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Adhesive micropatterns have become a standard tool to control cell shape and function in cell culture.
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Affiliation(s)
- Philipp J. Albert
- Institute for Theoretical Physics and BioQuant
- Heidelberg University
- 69120 Heidelberg
- Germany
| | - Ulrich S. Schwarz
- Institute for Theoretical Physics and BioQuant
- Heidelberg University
- 69120 Heidelberg
- Germany
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44
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Kurniawan NA, Chaudhuri PK, Lim CT. Mechanobiology of cell migration in the context of dynamic two-way cell-matrix interactions. J Biomech 2015; 49:1355-1368. [PMID: 26747513 DOI: 10.1016/j.jbiomech.2015.12.023] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 11/30/2015] [Accepted: 12/14/2015] [Indexed: 12/31/2022]
Abstract
Migration of cells is integral in various physiological processes in all facets of life. These range from embryonic development, morphogenesis, and wound healing, to disease pathology such as cancer metastasis. While cell migratory behavior has been traditionally studied using simple assays on culture dishes, in recent years it has been increasingly realized that the physical, mechanical, and chemical aspects of the matrix are key determinants of the migration mechanism. In this paper, we will describe the mechanobiological changes that accompany the dynamic cell-matrix interactions during cell migration. Furthermore, we will review what is to date known about how these changes feed back to the dynamics and biomechanical properties of the cell and the matrix. Elucidating the role of these intimate cell-matrix interactions will provide not only a better multi-scale understanding of cell motility in its physiological context, but also a more holistic perspective for designing approaches to regulate cell behavior.
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Affiliation(s)
- Nicholas A Kurniawan
- Department of Biomedical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600MB Eindhoven, The Netherlands; Department of Systems Biophysics, FOM Institute AMOLF, Amsterdam, The Netherlands.
| | | | - Chwee Teck Lim
- Mechanobiology Institute, National University of Singapore, Singapore; Department of Biomedical Engineering, National University of Singapore, Singapore.
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45
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Stochastic model explains formation of cell arrays on H/O-diamond patterns. Biointerphases 2015; 10:041006. [PMID: 26559048 DOI: 10.1116/1.4934794] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Cell migration plays an important role in many biological systems. A relatively simple stochastic model is developed and used to describe cell behavior on chemically patterned substrates. The model is based on three parameters: the speed of cell movement (own and external), the probability of cell adhesion, and the probability of cell division on the substrate. The model is calibrated and validated by experimental data obtained on hydrogen- and oxygen-terminated patterns on diamond. Thereby, the simulations reveal that: (1) the difference in the cell movement speed on these surfaces (about 1.5×) is the key factor behind the formation of cell arrays on the patterns, (2) this difference is provided by the presence of fetal bovine serum (validated by experiments), and (3) the directional cell flow promotes the array formation. The model also predicts that the array formation requires mean distance of cell travel at least 10% of intended stripe width. The model is generally applicable for biosensors using diverse cells, materials, and structures.
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46
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Schwarz US, Soiné JR. Traction force microscopy on soft elastic substrates: A guide to recent computational advances. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2015; 1853:3095-104. [DOI: 10.1016/j.bbamcr.2015.05.028] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 05/21/2015] [Accepted: 05/22/2015] [Indexed: 10/24/2022]
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47
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Ravasio A, Le AP, Saw TB, Tarle V, Ong HT, Bertocchi C, Mège RM, Lim CT, Gov N, Ladoux B. Regulation of epithelial cell organization by tuning cell-substrate adhesion. Integr Biol (Camb) 2015; 7:1228-41. [PMID: 26402903 PMCID: PMC5423524 DOI: 10.1039/c5ib00196j] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Collective migration of cells is of fundamental importance for a number of biological functions such as tissue development and regeneration, wound healing and cancer metastasis. The movement of cell groups consisting of multiple cells connected by cell-cell junctions depends on both extracellular and intercellular contacts. Epithelial cell assemblies are thus regulated by a cross-talk between cell-substrate and cell-cell interactions. Here, we investigated the onset of collective migration in groups of cells as they expand from a few cells into large colonies as a function of extracellular matrix (ECM) protein coating. By varying the amount of ECM presented to the cells, we observe that the mode of colony expansion, as well as their overall geometry, is strongly dependent on substrate adhesiveness. On high ECM protein coated surfaces, cells at the edges of the colonies are well spread exhibiting large outward-pointing protrusive activity, whereas cellular colonies display more circular and convex shapes on less adhesive surfaces. Actin structures at the edge of the colonies also show different organizations with the formation of lamellipodial structures on highly adhesive surfaces and a pluricellular actin cable on less adhesive ones. The analysis of traction forces and cell velocities within the cellular assemblies confirm these results. By increasing ECM protein density, cells exert higher traction forces together with a higher outward motility at the edges. Furthermore, tuning cell-cell adhesion of epithelial cells modified the mode of expansion of the colonies. Finally, we used a recently developed computational model to recapitulate the emergent experimental behaviors of expanding cell colonies and extract that the main effect of the different cell-substrate interactions is on the ability of edge cells to form outward lamellipodia-driven motility. Overall, our data suggest that switching behaviors of epithelial cell assemblies result in a tug-of-war between friction forces at the cell-substrate interface and cell-cell interactions.
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Affiliation(s)
- Andrea Ravasio
- Mechanobiology Institute, National University of Singapore, Singapore
| | - Anh Phuong Le
- Mechanobiology Institute, National University of Singapore, Singapore
- Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore
| | - Thuan Beng Saw
- Mechanobiology Institute, National University of Singapore, Singapore
- Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore
| | - Victoria Tarle
- Department of Chemical Physics, Weizmann Institute of Science, Rehovot, Israel
| | - Hui Ting Ong
- Mechanobiology Institute, National University of Singapore, Singapore
| | | | - René-Marc Mège
- Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore
| | - Chwee Teck Lim
- Mechanobiology Institute, National University of Singapore, Singapore
- Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore
- Department of Biomedical Engineering, National University of Singapore, Singapore
| | - Nir Gov
- Department of Chemical Physics, Weizmann Institute of Science, Rehovot, Israel
| | - Benoit Ladoux
- Mechanobiology Institute, National University of Singapore, Singapore
- Institut Jacques Monod, University Paris Diderot, Paris, France
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48
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Gjorevski N, Piotrowski AS, Varner VD, Nelson CM. Dynamic tensile forces drive collective cell migration through three-dimensional extracellular matrices. Sci Rep 2015; 5:11458. [PMID: 26165921 PMCID: PMC4499882 DOI: 10.1038/srep11458] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 05/27/2015] [Indexed: 01/07/2023] Open
Abstract
Collective cell migration drives tissue remodeling during development, wound repair, and metastatic invasion. The physical mechanisms by which cells move cohesively through dense three-dimensional (3D) extracellular matrix (ECM) remain incompletely understood. Here, we show directly that migration of multicellular cohorts through collagenous matrices occurs via a dynamic pulling mechanism, the nature of which had only been inferred previously in 3D. Tensile forces increase at the invasive front of cohorts, serving a physical, propelling role as well as a regulatory one by conditioning the cells and matrix for further extension. These forces elicit mechanosensitive signaling within the leading edge and align the ECM, creating microtracks conducive to further migration. Moreover, cell movements are highly correlated and in phase with ECM deformations. Migrating cohorts use spatially localized, long-range forces and consequent matrix alignment to navigate through the ECM. These results suggest biophysical forces are critical for 3D collective migration.
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Affiliation(s)
- Nikolce Gjorevski
- Department of Chemical &Biological Engineering, Princeton University, Princeton, NJ 08544, USA
| | - Alexandra S Piotrowski
- Department of Chemical &Biological Engineering, Princeton University, Princeton, NJ 08544, USA
| | - Victor D Varner
- Department of Chemical &Biological Engineering, Princeton University, Princeton, NJ 08544, USA
| | - Celeste M Nelson
- 1] Department of Chemical &Biological Engineering, Princeton University, Princeton, NJ 08544, USA [2] Department of Molecular Biology Princeton University, Princeton, NJ 08544
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49
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Ravasio A, Cheddadi I, Chen T, Pereira T, Ong HT, Bertocchi C, Brugues A, Jacinto A, Kabla AJ, Toyama Y, Trepat X, Gov N, Neves de Almeida L, Ladoux B. Gap geometry dictates epithelial closure efficiency. Nat Commun 2015; 6:7683. [PMID: 26158873 PMCID: PMC4510701 DOI: 10.1038/ncomms8683] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 06/02/2015] [Indexed: 12/12/2022] Open
Abstract
Closure of wounds and gaps in tissues is fundamental for the correct development and physiology of multicellular organisms and, when misregulated, may lead to inflammation and tumorigenesis. To re-establish tissue integrity, epithelial cells exhibit coordinated motion into the void by active crawling on the substrate and by constricting a supracellular actomyosin cable. Coexistence of these two mechanisms strongly depends on the environment. However, the nature of their coupling remains elusive because of the complexity of the overall process. Here we demonstrate that epithelial gap geometry in both in vitro and in vivo regulates these collective mechanisms. In addition, the mechanical coupling between actomyosin cable contraction and cell crawling acts as a large-scale regulator to control the dynamics of gap closure. Finally, our computational modelling clarifies the respective roles of the two mechanisms during this process, providing a robust and universal mechanism to explain how epithelial tissues restore their integrity.
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Affiliation(s)
- Andrea Ravasio
- Mechanobiology Institute, National University of Singapore, Singapore 117411, Singapore
| | - Ibrahim Cheddadi
- Sorbonne Universités, UPMC University Paris 06, CNRS UMR 7598, Laboratoire Jacques-Louis Lions, F-75252 Paris, France
| | - Tianchi Chen
- Mechanobiology Institute, National University of Singapore, Singapore 117411, Singapore
| | - Telmo Pereira
- CEDOC - Chronic Diseases Research Center, NOVA Medical School, Rua Camara Pestana, 6, Lisbon, 1150-082 Lisbon, Portugal
| | - Hui Ting Ong
- Mechanobiology Institute, National University of Singapore, Singapore 117411, Singapore
| | - Cristina Bertocchi
- Mechanobiology Institute, National University of Singapore, Singapore 117411, Singapore
| | - Agusti Brugues
- ICREA at Institute for Bioengineering of Catalonia and Universitat de Barcelona, 08028 Barcelona, Spain
| | - Antonio Jacinto
- CEDOC - Chronic Diseases Research Center, NOVA Medical School, Rua Camara Pestana, 6, Lisbon, 1150-082 Lisbon, Portugal
| | - Alexandre J Kabla
- Department of Engineering, University of Cambridge, Cambridge CB2 1PZ, UK
| | - Yusuke Toyama
- Mechanobiology Institute, National University of Singapore, Singapore 117411, Singapore.,Department of Biological Sciences National University of Singapore, Singapore 117543, Singapore.,Temasek Life Sciences Laboratory, Singapore 117604, Singapore
| | - Xavier Trepat
- ICREA at Institute for Bioengineering of Catalonia and Universitat de Barcelona, 08028 Barcelona, Spain
| | - Nir Gov
- Weizmann Institute of Science, Rehovot 76100, Israel
| | - Luís Neves de Almeida
- Sorbonne Universités, UPMC University Paris 06, CNRS UMR 7598, Laboratoire Jacques-Louis Lions, F-75252 Paris, France.,INRIA-Paris-Rocquencourt, MAMBA Team, 78153 Le Chesnay, Domaine de Voluceau BP105, France
| | - Benoit Ladoux
- Mechanobiology Institute, National University of Singapore, Singapore 117411, Singapore.,Institut Jacques Monod (IJM), CNRS UMR 7592 and Université Paris Diderot, 75013 Paris, France
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50
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Zhan R, Yang S, He W, Wang F, Tan J, Zhou J, Yang S, Yao Z, Wu J, Luo G. Nitric oxide enhances keratinocyte cell migration by regulating Rho GTPase via cGMP-PKG signalling. PLoS One 2015; 10:e0121551. [PMID: 25799230 PMCID: PMC4370851 DOI: 10.1371/journal.pone.0121551] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Accepted: 02/02/2015] [Indexed: 01/12/2023] Open
Abstract
Objective Nitric oxide (NO) has been shown to improve wound healing, but the mechanism underlying this function is not well defined. Here, we explored the effect of NO on the migration of a human keratinocyte cell line (HaCaT) and its possible mechanism. Methods The effects of NO on HaCaT cells in the presence of different concentrations of the NO donor sodium nitroprusside (SNP) were evaluated in a cell migration assay. Subsequently, the cytoskeleton reorganization of cultured HaCaT cells stained with rhodamine-phalloidin was observed with a confocal laser scanning microscope. The mRNA expression and active proteins of CDC42, Rac1 and RhoA in the cultured cells were determined via RT-PCR and pull-down assays, respectively. Furthermore, the roles of various inhibitors or agonists specific to cGMP, PKG and CDC42, Rac1, RhoA in the effects of NO on HaCaT cell migration, F-actin stress fibre formation, and Rho GTPase expression were observed. Results It was also found HaCaT cell migration was increased by SNP in a dose-dependent manner, and the other two NO donors either spermine NONOate or SNAP had almost the same effects on HaCat cell migrations. The formation of F-actin stress fibres in SNP-treated HaCaT cells was increased. The mRNA expression and the active proteins of CDC42, Rac1 and RhoA were found to be upregulated after SNP treatment. Similar effects were observed after the cells were treated with a cGMP or PKG agonist. Additionally, the SNP-mediated upregulation of the mRNA expression and the active proteins of CDC42, Rac1 and RhoA were inhibited by the addition of an inhibitor of cGMP or PKG. Moreover, the SNP-mediated promoting effects of migration and cytoskeleton reorganization were inhibited by treatment with inhibitors of cGMP, PKG, CDC42, Rac1 and RhoA respectively. Conclusion Our data indicated that the stimulatory effects of NO on cell migration of HaCaT cells are mediated by the cGMP signalling pathway via the upregulation of Rho-GTPase expression, which might promote cytoskeleton reorganization.
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Affiliation(s)
- Rixing Zhan
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Shiwei Yang
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Weifeng He
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Fan Wang
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Jianglin Tan
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Junyi Zhou
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Sisi Yang
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Zhihui Yao
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Jun Wu
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University, Chongqing, China
- * E-mail: (JW); (GL)
| | - Gaoxing Luo
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University, Chongqing, China
- * E-mail: (JW); (GL)
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