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Boutillon A, Banavar SP, Campàs O. Conserved physical mechanisms of cell and tissue elongation. Development 2024; 151:dev202687. [PMID: 38767601 PMCID: PMC11190436 DOI: 10.1242/dev.202687] [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] [Indexed: 05/22/2024]
Abstract
Living organisms have the ability to self-shape into complex structures appropriate for their function. The genetic and molecular mechanisms that enable cells to do this have been extensively studied in several model and non-model organisms. In contrast, the physical mechanisms that shape cells and tissues have only recently started to emerge, in part thanks to new quantitative in vivo measurements of the physical quantities guiding morphogenesis. These data, combined with indirect inferences of physical characteristics, are starting to reveal similarities in the physical mechanisms underlying morphogenesis across different organisms. Here, we review how physics contributes to shape cells and tissues in a simple, yet ubiquitous, morphogenetic transformation: elongation. Drawing from observed similarities across species, we propose the existence of conserved physical mechanisms of morphogenesis.
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Affiliation(s)
- Arthur Boutillon
- Cluster of Excellence Physics of Life, TU Dresden, 01062 Dresden, Germany
| | - Samhita P. Banavar
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08540, USA
| | - Otger Campàs
- Cluster of Excellence Physics of Life, TU Dresden, 01062 Dresden, Germany
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
- Center for Systems Biology Dresden, 01307 Dresden, Germany
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Bai J, Zeng X. Computational modeling and simulation of epithelial wound closure. Sci Rep 2023; 13:6265. [PMID: 37069231 PMCID: PMC10110613 DOI: 10.1038/s41598-023-33111-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Accepted: 04/07/2023] [Indexed: 04/19/2023] Open
Abstract
Wounds in the epithelium may lead to serious injurious events or chronic inflammatory diseases, however, multicellular organisms have the ability to self-repair wounds through the movement of epithelial cell toward the wound area. Despite intensive studies exploring the mechanism of wound closure, the role of mechanics in epithelial wound closure is still not well explained. In order to investigate the role of mechanical properties on wound closure process, a three-dimensional continuum physics-based computational model is presented in this study. The model takes into account the material property of the epithelial cell, intercellular interactions between neighboring cells at cell-cell junctions, and cell-substrate adhesion between epithelial cells and ECM. Through finite element simulation, it is found that the closure efficiency is related to the initial gap size and the intensity of lamellipodial protrusion. It is also shown that cells at the wound edge undergo higher stress compared with other cells in the epithelial monolayer, and the cellular normal stress dominates over the cellular shear stress. The model presented in this study can be employed as a numerical tool to unravel the mechanical principles behind the complex wound closure process. These results might have the potential to improve effective wound management and optimize the treatment.
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Affiliation(s)
- Jie Bai
- Department of Mechanical Engineering, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA
| | - Xiaowei Zeng
- Department of Mechanical Engineering, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA.
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Paudel SS, deWeever A, Sayner S, Stevens T, Tambe DT. Substrate stiffness modulates migration and local intercellular membrane motion in pulmonary endothelial cell monolayers. Am J Physiol Cell Physiol 2022; 323:C936-C949. [PMID: 35912996 PMCID: PMC9467474 DOI: 10.1152/ajpcell.00339.2021] [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: 09/13/2021] [Revised: 07/22/2022] [Accepted: 07/22/2022] [Indexed: 11/22/2022]
Abstract
The pulmonary artery endothelium forms a semipermeable barrier that limits macromolecular flux through intercellular junctions. This barrier is maintained by an intrinsic forward protrusion of the interacting membranes between adjacent cells. However, the dynamic interactions of these membranes have been incompletely quantified. Here, we present a novel technique to quantify the motion of the peripheral membrane of the cells, called paracellular morphological fluctuations (PMFs), and to assess the impact of substrate stiffness on PMFs. Substrate stiffness impacted large-length scale morphological changes such as cell size and motion. Cell size was larger on stiffer substrates, whereas the speed of cell movement was decreased on hydrogels with stiffness either larger or smaller than 1.25 kPa, consistent with cells approaching a jammed state. Pulmonary artery endothelial cells moved fastest on 1.25 kPa hydrogel, a stiffness consistent with a healthy pulmonary artery. Unlike these large-length scale morphological changes, the baseline of PMFs was largely insensitive to the substrate stiffness on which the cells were cultured. Activation of store-operated calcium channels using thapsigargin treatment triggered a transient increase in PMFs beyond the control treatment. However, in hypocalcemic conditions, such an increase in PMFs was absent on 1.25 kPa hydrogel but was present on 30 kPa hydrogel-a stiffness consistent with that of a hypertensive pulmonary artery. These findings indicate that 1) PMFs occur in cultured endothelial cell clusters, irrespective of the substrate stiffness; 2) PMFs increase in response to calcium influx through store-operated calcium entry channels; and 3) stiffer substrate promotes PMFs through a mechanism that does not require calcium influx.
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Affiliation(s)
- Sunita Subedi Paudel
- Department of Physiology and Cell Biology, University of South Alabama, Mobile, Alabama
- Department of Mechanical Aerospace and Biomedical Engineering, University of South Alabama, Mobile, Alabama
- Center for Lung Biology, University of South Alabama, Mobile, Alabama
| | - Althea deWeever
- Department of Physiology and Cell Biology, University of South Alabama, Mobile, Alabama
- Center for Lung Biology, University of South Alabama, Mobile, Alabama
| | - Sarah Sayner
- Department of Physiology and Cell Biology, University of South Alabama, Mobile, Alabama
- Center for Lung Biology, University of South Alabama, Mobile, Alabama
| | - Troy Stevens
- Department of Physiology and Cell Biology, University of South Alabama, Mobile, Alabama
- Department of Internal Medicine, University of South Alabama, Mobile, Alabama
- Department of Mechanical Aerospace and Biomedical Engineering, University of South Alabama, Mobile, Alabama
| | - Dhananjay T Tambe
- Department of Mechanical Aerospace and Biomedical Engineering, University of South Alabama, Mobile, Alabama
- Department of Pharmacology, University of South Alabama, Mobile, Alabama
- Center for Lung Biology, University of South Alabama, Mobile, Alabama
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Pajic-Lijakovic I, Milivojevic M. Marangoni effect and cell spreading. EUROPEAN BIOPHYSICS JOURNAL : EBJ 2022; 51:419-429. [PMID: 35930028 DOI: 10.1007/s00249-022-01612-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Accepted: 07/25/2022] [Indexed: 06/15/2023]
Abstract
Cells are very sensitive to the shear stress (SS). However, undesirable SS is generated during physiological process such as collective cell migration (CCM) and influences the biological processes such as morphogenesis, wound healing and cancer invasion. Despite extensive research devoted to study the SS generation caused by CCM, we still do not fully understand the main cause of SS appearance. An attempt is made here to offer some answers to these questions by considering the rearrangement of cell monolayers. The SS generation represents a consequence of natural and forced convection. While forced convection is dependent on cell speed, the natural convection is induced by the gradient of tissue surface tension. The phenomenon is known as the Marangoni effect. The gradient of tissue surface tension induces directed cell spreading from the regions of lower tissue surface tension to the regions of higher tissue surface tension and leads to the cell sorting. This directional cell migration is described by the Marangoni flux. The phenomenon has been recognized during the rearrangement of (1) epithelial cell monolayers and (2) mixed cell monolayers made by epithelial and mesenchymal cells. The consequence of the Marangoni effect is an intensive spreading of cancer cells through an epithelium. In this work, a review of existing literature about SS generation caused by CCM is given along with the assortment of published experimental findings, to invite experimentalists to test given theoretical considerations in multicellular systems.
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Affiliation(s)
- Ivana Pajic-Lijakovic
- Faculty of Technology and Metallurgy, Department of Chemical Engineering, University of Belgrade, Belgrade, Serbia.
| | - Milan Milivojevic
- Faculty of Technology and Metallurgy, Department of Chemical Engineering, University of Belgrade, Belgrade, Serbia
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Xu Y, Bai T, Xiong Y, Liu C, Liu Y, Hou X, Song J. Mechanical stimulation activates Piezo1 to promote mucin2 expression in goblet cells. J Gastroenterol Hepatol 2021; 36:3127-3139. [PMID: 34169583 DOI: 10.1111/jgh.15596] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 04/26/2021] [Accepted: 06/19/2021] [Indexed: 01/01/2023]
Abstract
BACKGROUND AND AIM Studies on the regulation of mucin2 expression in intestinal goblet cells by the endocrine system and the immune system have been comprehensive, but the effects of abundant mechanical factors in the intestinal microenvironment on goblet cells are not clear. METHODS We constructed mechanical stimulation models in vivo and in vitro to explore the effect of mechanical stimulation on intestinal goblet cells. Piezo1 expression and function were regulated through model mouse and drugs to explored whether Piezo1 mediated mechanical stimulation. RESULTS The results showed that hydrostatic pressure could promote mucus secretion in the mouse colon, and both traction force and shear force could promote the expression of mucin2 in the LS174T cell line. We further found that the Piezo1 protein, which was abundantly expressed in goblet cells, acted as a mechanoreceptor. Knockout of Piezo1 in the intestinal epithelial cells of mice could reduce the promotion of mucus secretion by pressure stimulation, and the specific downregulation of Piezo1 protein in LS174T cells or Piezo1 inhibitor treatment could significantly reduce the promotion of mucin2 expression in goblet cells by mechanical stimulation; however, treatment with a Piezo1 agonist had the opposite effect. Moreover, we found that Piezo1 regulated mucin2 expression through the downstream Erk/Ca2+ pathway. CONCLUSION In short, our study confirmed for the first time that goblet cells are mechanoreceptive cells that can directly sense mechanical stimulation in the intestinal tract and respond back through the Piezo1-Erk/Ca2+ -mucin2 pathway.
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Affiliation(s)
- Yan Xu
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tao Bai
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yilin Xiong
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Caiyuan Liu
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ying Liu
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaohua Hou
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jun Song
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Gorji A, Toh PJY, Ong HT, Toh YC, Toyama Y, Kanchanawong P. Enhancement of Endothelialization by Topographical Features Is Mediated by PTP1B-Dependent Endothelial Adherens Junctions Remodeling. ACS Biomater Sci Eng 2021; 7:2661-2675. [PMID: 33942605 DOI: 10.1021/acsbiomaterials.1c00251] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Endothelial Cells (ECs) form cohesive cellular lining of the vasculature and play essential roles in both developmental processes and pathological conditions. Collective migration and proliferation of endothelial cells (ECs) are key processes underlying endothelialization of vessels as well as vascular graft, but the complex interplay of mechanical and biochemical signals regulating these processes are still not fully elucidated. While surface topography and biochemical modifications have been used to enhance endothelialization in vitro, thus far such single-modality modifications have met with limited success. As combination therapy that utilizes multiple modalities has shown improvement in addressing various intractable and complex biomedical conditions, here, we explore a combined strategy that utilizes topographical features in conjunction with pharmacological perturbations. We characterized EC behaviors in response to micrometer-scale grating topography in concert with pharmacological perturbations of endothelial adherens junctions (EAJ) regulators. We found that the protein tyrosine phosphatase, PTP1B, serves as a potent regulator of EAJ stability, with PTP1B inhibition synergizing with grating topographies to modulate EAJ rearrangement, thereby augmenting global EC monolayer sheet orientation, proliferation, connectivity, and collective cell migration. Our data delineates the crosstalk between cell-ECM topography sensing and cell-cell junction integrity maintenance and suggests that the combined use of grating topography and PTP1B inhibitor could be a promising strategy for promoting collective EC migration and proliferation.
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Affiliation(s)
- Azita Gorji
- Mechanobiology Institute, National University of Singapore, 117411 Republic of Singapore.,Institut Curie, Laboratoire Physico Chimie Curie, Institut Pierre-Gilles de Gennes, CNRS UMR168, Paris 75005, France
| | - Pearlyn Jia Ying Toh
- Mechanobiology Institute, National University of Singapore, 117411 Republic of Singapore
| | - Hui Ting Ong
- Mechanobiology Institute, National University of Singapore, 117411 Republic of Singapore
| | - Yi-Chin Toh
- Department of Biomedical Engineering, National University of Singapore, 117583 Republic of Singapore.,Institute for Health Innovation and Technology, National University of Singapore, 117599 Republic of Singapore.,The N.1 Institute for Health, National University of Singapore, 117456, Republic of Singapore.,NUS Tissue Engineering Programme, National University of Singapore, 117456, Republic of Singapore
| | - Yusuke Toyama
- Mechanobiology Institute, National University of Singapore, 117411 Republic of Singapore.,Department of Biological Sciences, National University of Singapore, 117558, Republic of Singapore
| | - Pakorn Kanchanawong
- Mechanobiology Institute, National University of Singapore, 117411 Republic of Singapore.,Department of Biomedical Engineering, National University of Singapore, 117583 Republic of Singapore
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Xu N, Ayers L, Pastukh V, Alexeyev M, Stevens T, Tambe DT. Impact of Na+ permeation on collective migration of pulmonary arterial endothelial cells. PLoS One 2021; 16:e0250095. [PMID: 33891591 PMCID: PMC8064576 DOI: 10.1371/journal.pone.0250095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 03/30/2021] [Indexed: 11/19/2022] Open
Abstract
Collective migration of endothelial cells is important for wound healing and angiogenesis. During such migration, each constituent endothelial cell coordinates its magnitude and direction of migration with its neighbors while retaining intercellular adhesion. Ensuring coordination and cohesion involves a variety of intra- and inter-cellular signaling processes. However, the role of permeation of extracellular Na+ in collective cell migration remains unclear. Here, we examined the effect of Na+ permeation in collective migration of pulmonary artery endothelial cell (PAEC) monolayers triggered by either a scratch injury or a barrier removal over 24 hours. In the scratch assay, PAEC monolayers migrated in two approximately linear phases. In the first phase, wound closure started with fast speed which then rapidly reduced within 5 hours after scratching. In the second phase, wound closure maintained at slow and stable speed from 6 to 24 hours. In the absence of extracellular Na+, the wound closure distance was reduced by >50%. Fewer cells at the leading edge protruded prominent lamellipodia. Beside transient gaps, some sustained interendothelial gaps also formed and progressively increased in size over time, and some fused with adjacent gaps. In the absence of both Na+ and scratch injury, PAEC monolayer migrated even more slowly, and interendothelial gaps obviously increased in size towards the end. Pharmacological inhibition of the epithelial Na+ channel (ENaC) using amiloride reduced wound closure distance by 30%. Inhibition of both the ENaC and the Na+/Ca2+ exchanger (NCX) using benzamil further reduced wound closure distance in the second phase and caused accumulation of floating particles in the media. Surprisingly, pharmacological inhibition of the Ca2+ release-activated Ca2+ (CRAC) channel protein 1 (Orai1) using GSK-7975A, the transient receptor potential channel protein 1 and 4 (TRPC1/4) using Pico145, or both Orai1 and TRPC1/4 using combined GSK-7975A and Pico145 treatment did not affect wound closure distance dramatically. Nevertheless, the combined treatment appeared to cause accumulation of floating particles. Note that GSK-7975A also inhibits small inward Ca2+ currents via Orai2 and Orai3 channels, whereas Pico145 also blocks TRPC4, TRPC5, and TRPC1/5 channels. By contrast, gene silence of Orai1 by shRNAs led to a 25% reduction of wound closure in the first 6 hours but had no effect afterwards. However, in the absence of extracellular Na+ or cellular injury, Orai1 did not affect PAEC collective migration. Overall, the data reveal that Na+ permeation into cells contributes to PAEC monolayer collective migration by increasing lamellipodial formation, reducing accumulation of floating particles, and improving intercellular adhesion.
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Affiliation(s)
- Ningyong Xu
- Department of Physiology and Cell Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
- Center for Lung Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
| | - Linn Ayers
- Department of Physiology and Cell Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
- Center for Lung Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
| | - Viktoriya Pastukh
- Department of Physiology and Cell Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
| | - Mikhail Alexeyev
- Department of Physiology and Cell Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
- Center for Lung Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
- Departments of Internal Medicine, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
| | - Troy Stevens
- Department of Physiology and Cell Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
- Center for Lung Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
- Departments of Internal Medicine, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
- * E-mail: (DTT); (TS)
| | - Dhananjay T. Tambe
- Center for Lung Biology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
- Departments of Pharmacology, College of Medicine, University of South Alabama, Mobile, Alabama, United States of America
- Department of Mechanical, Aerospace, and Biomedical Engineering, College of Engineering, University of South Alabama, Mobile, Alabama, United States of America
- * E-mail: (DTT); (TS)
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