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Simonin JL, Tomba C, Mercier V, Bacchetta M, Idris T, Badaoui M, Roux A, Chanson M. Apical dehydration impairs the cystic fibrosis airway epithelium barrier via a β1-integrin/YAP1 pathway. Life Sci Alliance 2024; 7:e202302449. [PMID: 38336456 PMCID: PMC10858171 DOI: 10.26508/lsa.202302449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 01/31/2024] [Accepted: 01/31/2024] [Indexed: 02/12/2024] Open
Abstract
Defective hydration of airway surface mucosa is associated with lung infection in cystic fibrosis (CF), partly caused by disruption of the epithelial barrier integrity. Although rehydration of the CF airway surface liquid (ASL) alleviates epithelium vulnerability to infection by junctional protein expression, the mechanisms linking ASL to barrier integrity are unknown. We show here the strong degradation of YAP1 and TAZ proteins in well-polarized CF human airway epithelial cells (HAECs), a process that was prevented by ASL rehydration. Conditional silencing of YAP1 in rehydrated CF HAECs indicated that YAP1 expression was necessary for the maintenance of junctional complexes. A higher plasma membrane tension in CF HAECs reduced endocytosis, concurrent with the maintenance of active β1-integrin ectopically located at the apical membrane. Pharmacological inhibition of β1-integrin accumulation restored YAP1 expression in CF HAECs. These results indicate that dehydration of the CF ASL affects epithelial plasma membrane tension, resulting in ectopic activation of a β1-integrin/YAP1 signaling pathway associated with degradation of junctional proteins.
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Affiliation(s)
- Juliette L Simonin
- https://ror.org/01swzsf04 Department of Cell Physiology and Metabolism, University of Geneva, Faculty of Medicine, Geneva, Switzerland
| | - Caterina Tomba
- https://ror.org/01swzsf04 Department of Biochemistry, Faculty of Sciences, University of Geneva, Geneva, Switzerland
| | - Vincent Mercier
- https://ror.org/01swzsf04 Department of Biochemistry, Faculty of Sciences, University of Geneva, Geneva, Switzerland
| | - Marc Bacchetta
- https://ror.org/01swzsf04 Department of Cell Physiology and Metabolism, University of Geneva, Faculty of Medicine, Geneva, Switzerland
| | - Tahir Idris
- https://ror.org/01swzsf04 Department of Cell Physiology and Metabolism, University of Geneva, Faculty of Medicine, Geneva, Switzerland
| | - Mehdi Badaoui
- https://ror.org/01swzsf04 Department of Cell Physiology and Metabolism, University of Geneva, Faculty of Medicine, Geneva, Switzerland
| | - Aurélien Roux
- https://ror.org/01swzsf04 Department of Biochemistry, Faculty of Sciences, University of Geneva, Geneva, Switzerland
| | - Marc Chanson
- https://ror.org/01swzsf04 Department of Cell Physiology and Metabolism, University of Geneva, Faculty of Medicine, Geneva, Switzerland
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2
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Schamberger B, Ziege R, Anselme K, Ben Amar M, Bykowski M, Castro APG, Cipitria A, Coles RA, Dimova R, Eder M, Ehrig S, Escudero LM, Evans ME, Fernandes PR, Fratzl P, Geris L, Gierlinger N, Hannezo E, Iglič A, Kirkensgaard JJK, Kollmannsberger P, Kowalewska Ł, Kurniawan NA, Papantoniou I, Pieuchot L, Pires THV, Renner LD, Sageman-Furnas AO, Schröder-Turk GE, Sengupta A, Sharma VR, Tagua A, Tomba C, Trepat X, Waters SL, Yeo EF, Roschger A, Bidan CM, Dunlop JWC. Curvature in Biological Systems: Its Quantification, Emergence, and Implications across the Scales. Adv Mater 2023; 35:e2206110. [PMID: 36461812 DOI: 10.1002/adma.202206110] [Citation(s) in RCA: 24] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 11/22/2022] [Indexed: 06/17/2023]
Abstract
Surface curvature both emerges from, and influences the behavior of, living objects at length scales ranging from cell membranes to single cells to tissues and organs. The relevance of surface curvature in biology is supported by numerous experimental and theoretical investigations in recent years. In this review, first, a brief introduction to the key ideas of surface curvature in the context of biological systems is given and the challenges that arise when measuring surface curvature are discussed. Giving an overview of the emergence of curvature in biological systems, its significance at different length scales becomes apparent. On the other hand, summarizing current findings also shows that both single cells and entire cell sheets, tissues or organisms respond to curvature by modulating their shape and their migration behavior. Finally, the interplay between the distribution of morphogens or micro-organisms and the emergence of curvature across length scales is addressed with examples demonstrating these key mechanistic principles of morphogenesis. Overall, this review highlights that curved interfaces are not merely a passive by-product of the chemical, biological, and mechanical processes but that curvature acts also as a signal that co-determines these processes.
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Affiliation(s)
- Barbara Schamberger
- Department of the Chemistry and Physics of Materials, Paris-Lodron University of Salzburg, 5020, Salzburg, Austria
| | - Ricardo Ziege
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, 14476, Potsdam, Germany
| | - Karine Anselme
- IS2M (CNRS - UMR 7361), Université de Haute-Alsace, F-68100, Mulhouse, France
- Université de Strasbourg, F-67081, Strasbourg, France
| | - Martine Ben Amar
- Department of Physics, Laboratoire de Physique de l'Ecole Normale Supérieure, 24 rue Lhomond, 75005, Paris, France
| | - Michał Bykowski
- Department of Plant Anatomy and Cytology, Faculty of Biology, University of Warsaw, 02-096, Warsaw, Poland
| | - André P G Castro
- IDMEC, Instituto Superior Técnico, Universidade de Lisboa, 1049-001, Lisboa, Portugal
- ESTS, Instituto Politécnico de Setúbal, 2914-761, Setúbal, Portugal
| | - Amaia Cipitria
- IS2M (CNRS - UMR 7361), Université de Haute-Alsace, F-68100, Mulhouse, France
- Group of Bioengineering in Regeneration and Cancer, Biodonostia Health Research Institute, 20014, San Sebastian, Spain
- IKERBASQUE, Basque Foundation for Science, 48009, Bilbao, Spain
| | - Rhoslyn A Coles
- Cluster of Excellence, Matters of Activity, Humboldt-Universität zu Berlin, 10178, Berlin, Germany
| | - Rumiana Dimova
- Department of Theory and Bio-Systems, Max Planck Institute of Colloids and Interfaces, 14476, Potsdam, Germany
| | - Michaela Eder
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, 14476, Potsdam, Germany
| | - Sebastian Ehrig
- Max Delbrück Center for Molecular Medicine, 13125, Berlin, Germany
- Berlin Institute for Medical Systems Biology, 10115, Berlin, Germany
| | - Luis M Escudero
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla and Departamento de Biología Celular, Universidad de Sevilla, 41013, Seville, Spain
- Biomedical Network Research Centre on Neurodegenerative Diseases (CIBERNED), 28031, Madrid, Spain
| | - Myfanwy E Evans
- Institute for Mathematics, University of Potsdam, 14476, Potsdam, Germany
| | - Paulo R Fernandes
- IDMEC, Instituto Superior Técnico, Universidade de Lisboa, 1049-001, Lisboa, Portugal
| | - Peter Fratzl
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, 14476, Potsdam, Germany
| | - Liesbet Geris
- Biomechanics Research Unit, GIGA In Silico Medicine, University of Liège, 4000, Liège, Belgium
| | - Notburga Gierlinger
- Institute of Biophysics, Department of Nanobiotechnology, University of Natural Resources and Life Sciences Vienna (Boku), 1190, Vienna, Austria
| | - Edouard Hannezo
- Institute of Science and Technology Austria, 3400, Klosterneuburg, Austria
| | - Aleš Iglič
- Laboratory of Physics, Faculty of Electrical engineering, University of Ljubljana, Tržaška 25, SI-1000, Ljubljana, Slovenia
| | - Jacob J K Kirkensgaard
- Condensed Matter Physics, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100, København Ø, Denmark
- Ingredients and Dairy Technology, Department of Food Science, University of Copenhagen, Rolighedsvej 26, 1958, Frederiksberg, Denmark
| | - Philip Kollmannsberger
- Center for Computational and Theoretical Biology, University of Würzburg, 97074, Würzburg, Germany
| | - Łucja Kowalewska
- Department of Plant Anatomy and Cytology, Faculty of Biology, University of Warsaw, 02-096, Warsaw, Poland
| | - Nicholas A Kurniawan
- Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, 5600 MB, Eindhoven, The Netherlands
| | - Ioannis Papantoniou
- Prometheus Division of Skeletal Tissue Engineering, KU Leuven, O&N1, Herestraat 49, PB 813, 3000, Leuven, Belgium
- Skeletal Biology and Engineering Research Center, Department of Development and Regeneration, KU Leuven, O&N1, Herestraat 49, PB 813, 3000, Leuven, Belgium
- Institute of Chemical Engineering Sciences, Foundation for Research and Technology (FORTH), Stadiou Str., 26504, Patras, Greece
| | - Laurent Pieuchot
- IS2M (CNRS - UMR 7361), Université de Haute-Alsace, F-68100, Mulhouse, France
- Université de Strasbourg, F-67081, Strasbourg, France
| | - Tiago H V Pires
- IDMEC, Instituto Superior Técnico, Universidade de Lisboa, 1049-001, Lisboa, Portugal
| | - Lars D Renner
- Leibniz Institute of Polymer Research and the Max Bergmann Center of Biomaterials, 01069, Dresden, Germany
| | | | - Gerd E Schröder-Turk
- School of Physics, Chemistry and Mathematics, Murdoch University, 90 South St, Murdoch, WA, 6150, Australia
- Department of Materials Physics, Research School of Physics, The Australian National University, Canberra, ACT, 2600, Australia
| | - Anupam Sengupta
- Physics of Living Matter, Department of Physics and Materials Science, University of Luxembourg, L-1511, Luxembourg City, Grand Duchy of Luxembourg
| | - Vikas R Sharma
- Department of the Chemistry and Physics of Materials, Paris-Lodron University of Salzburg, 5020, Salzburg, Austria
| | - Antonio Tagua
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla and Departamento de Biología Celular, Universidad de Sevilla, 41013, Seville, Spain
- Biomedical Network Research Centre on Neurodegenerative Diseases (CIBERNED), 28031, Madrid, Spain
| | - Caterina Tomba
- Univ Lyon, CNRS, INSA Lyon, Ecole Centrale de Lyon, Université Claude Bernard Lyon 1, CPE Lyon, INL, UMR5270, 69622, Villeurbanne, France
| | - Xavier Trepat
- ICREA at the Institute for Bioengineering of Catalonia, The Barcelona Institute for Science and Technology, 08028, Barcelona, Spain
- Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 08028, Barcelona, Spain
| | - Sarah L Waters
- Mathematical Institute, University of Oxford, OX2 6GG, Oxford, UK
| | - Edwina F Yeo
- Mathematical Institute, University of Oxford, OX2 6GG, Oxford, UK
| | - Andreas Roschger
- Department of the Chemistry and Physics of Materials, Paris-Lodron University of Salzburg, 5020, Salzburg, Austria
| | - Cécile M Bidan
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, 14476, Potsdam, Germany
| | - John W C Dunlop
- Department of the Chemistry and Physics of Materials, Paris-Lodron University of Salzburg, 5020, Salzburg, Austria
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3
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Tomba C, Luchnikov V, Barberi L, Blanch-Mercader C, Roux A. Epithelial cells adapt to curvature induction via transient active osmotic swelling. Dev Cell 2022; 57:1257-1270.e5. [PMID: 35568030 PMCID: PMC9165930 DOI: 10.1016/j.devcel.2022.04.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 02/11/2022] [Accepted: 04/21/2022] [Indexed: 11/29/2022]
Abstract
Generation of tissue curvature is essential to morphogenesis. However, how cells adapt to changing curvature is still unknown because tools to dynamically control curvature in vitro are lacking. Here, we developed self-rolling substrates to study how flat epithelial cell monolayers adapt to a rapid anisotropic change of curvature. We show that the primary response is an active and transient osmotic swelling of cells. This cell volume increase is not observed on inducible wrinkled substrates, where concave and convex regions alternate each other over short distances; and this finding identifies swelling as a collective response to changes of curvature with a persistent sign over large distances. It is triggered by a drop in membrane tension and actin depolymerization, which is perceived by cells as a hypertonic shock. Osmotic swelling restores tension while actin reorganizes, probably to comply with curvature. Thus, epithelia are unique materials that transiently and actively swell while adapting to large curvature induction. Rapid inward and outward epithelial rolling triggers cell volume increase Epithelial folding induces a mechano-osmotic feedback loop that involvs ion channels Cell volume regulation in curved tissues involves actin, membrane tension, and mTORC2
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Affiliation(s)
- Caterina Tomba
- Department of Biochemistry, University of Geneva, Quai Ernest Ansermet 30, Geneva 1211, Switzerland.
| | - Valeriy Luchnikov
- Université de Haute Alsace, CNRS, IS2M UMR 7361, 15, rue Jean Starcky, Mulhouse 68100, France
| | - Luca Barberi
- Department of Biochemistry, University of Geneva, Quai Ernest Ansermet 30, Geneva 1211, Switzerland
| | - Carles Blanch-Mercader
- Department of Biochemistry, University of Geneva, Quai Ernest Ansermet 30, Geneva 1211, Switzerland
| | - Aurélien Roux
- Department of Biochemistry, University of Geneva, Quai Ernest Ansermet 30, Geneva 1211, Switzerland; National Center of Competence in Research Chemical Biology, University of Geneva, Quai Ernest Ansermet 30, Geneva 1211, Switzerland.
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4
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Tomba C, Migdal C, Fuard D, Villard C, Nicolas A. Poly-l-lysine/Laminin Surface Coating Reverses Glial Cell Mechanosensitivity on Stiffness-Patterned Hydrogels. ACS Appl Bio Mater 2022; 5:1552-1563. [PMID: 35274925 DOI: 10.1021/acsabm.1c01295] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Brain tissues demonstrate heterogeneous mechanical properties, which evolve with aging and pathologies. The observation in these tissues of smooth to sharp rigidity gradients raises the question of brain cell responses to both different values of rigidity and their spatial variations, in dependence on the surface chemistry they are exposed to. Here, we used recent techniques of hydrogel photopolymerization to achieve stiffness texturing down to micrometer resolution in polyacrylamide hydrogels. We investigated primary neuron adhesion and orientation as well as glial cell proliferative properties on these rigidity-textured hydrogels for two adhesive coatings: fibronectin or poly-l-lysine/laminin. Our main observation is that glial cell adhesion and proliferation is favored on the stiffer regions when the adhesive coating is fibronectin and on the softer ones when it consists of poly-l-lysine/laminin. This behavior was unchanged by the presence or the absence of neuronal cells. In addition, glial cells were not confined by sharp, micron-scaled gradients of rigidity. Our observations suggest that rigidity sensing could involve adhesion-related pathways that profoundly depend on surface chemistry.
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Affiliation(s)
- Caterina Tomba
- Univ. Grenoble Alps, CNRS, LTM, 38000 Grenoble, France.,Univ. Grenoble Alps, CNRS, Grenoble INP, Institut Néel, 38000 Grenoble, France
| | - Camille Migdal
- Univ. Grenoble Alps, CNRS, LTM, 38000 Grenoble, France.,Univ. Grenoble Alps, CEA, CNRS, Inserm, BIG-BCI, 38000 Grenoble, France.,Univ. Grenoble Alps, CEA, Inserm, BIG-BGE, 38000 Grenoble, France
| | - David Fuard
- Univ. Grenoble Alps, CNRS, LTM, 38000 Grenoble, France
| | - Catherine Villard
- Univ. Grenoble Alps, CNRS, Grenoble INP, Institut Néel, 38000 Grenoble, France
| | - Alice Nicolas
- Univ. Grenoble Alps, CNRS, LTM, 38000 Grenoble, France
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5
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Xi W, Saleh J, Yamada A, Tomba C, Mercier B, Janel S, Dang T, Soleilhac M, Djemat A, Wu H, Romagnolo B, Lafont F, Mège RM, Chen Y, Delacour D. Modulation of designer biomimetic matrices for optimized differentiated intestinal epithelial cultures. Biomaterials 2022; 282:121380. [DOI: 10.1016/j.biomaterials.2022.121380] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 01/07/2022] [Accepted: 01/16/2022] [Indexed: 12/22/2022]
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6
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Mgharbel A, Migdal C, Bouchonville N, Dupenloup P, Fuard D, Lopez-Soler E, Tomba C, Courçon M, Gulino-Debrac D, Delanoë-Ayari H, Nicolas A. Cells on Hydrogels with Micron-Scaled Stiffness Patterns Demonstrate Local Stiffness Sensing. Nanomaterials (Basel) 2022; 12:nano12040648. [PMID: 35214978 PMCID: PMC8880377 DOI: 10.3390/nano12040648] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 01/31/2022] [Accepted: 02/07/2022] [Indexed: 12/15/2022]
Abstract
Cell rigidity sensing-a basic cellular process allowing cells to adapt to mechanical cues-involves cell capabilities exerting force on the extracellular environment. In vivo, cells are exposed to multi-scaled heterogeneities in the mechanical properties of the surroundings. Here, we investigate whether cells are able to sense micron-scaled stiffness textures by measuring the forces they transmit to the extracellular matrix. To this end, we propose an efficient photochemistry of polyacrylamide hydrogels to design micron-scale stiffness patterns with kPa/µm gradients. Additionally, we propose an original protocol for the surface coating of adhesion proteins, which allows tuning the surface density from fully coupled to fully independent of the stiffness pattern. This evidences that cells pull on their surroundings by adjusting the level of stress to the micron-scaled stiffness. This conclusion was achieved through improvements in the traction force microscopy technique, e.g., adapting to substrates with a non-uniform stiffness and achieving a submicron resolution thanks to the implementation of a pyramidal optical flow algorithm. These developments provide tools for enhancing the current understanding of the contribution of stiffness alterations in many pathologies, including cancer.
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Affiliation(s)
- Abbas Mgharbel
- University Grenoble Alps, CNRS, LTM, 38000 Grenoble, France; (A.M.); (C.M.); (N.B.); (P.D.); (D.F.); (E.L.-S.); (C.T.)
- University Grenoble Alps, CEA, CNRS, Inserm, BIG-BCI, 38000 Grenoble, France; (M.C.); (D.G.-D.)
| | - Camille Migdal
- University Grenoble Alps, CNRS, LTM, 38000 Grenoble, France; (A.M.); (C.M.); (N.B.); (P.D.); (D.F.); (E.L.-S.); (C.T.)
- University Grenoble Alps, CEA, CNRS, Inserm, BIG-BCI, 38000 Grenoble, France; (M.C.); (D.G.-D.)
| | - Nicolas Bouchonville
- University Grenoble Alps, CNRS, LTM, 38000 Grenoble, France; (A.M.); (C.M.); (N.B.); (P.D.); (D.F.); (E.L.-S.); (C.T.)
| | - Paul Dupenloup
- University Grenoble Alps, CNRS, LTM, 38000 Grenoble, France; (A.M.); (C.M.); (N.B.); (P.D.); (D.F.); (E.L.-S.); (C.T.)
| | - David Fuard
- University Grenoble Alps, CNRS, LTM, 38000 Grenoble, France; (A.M.); (C.M.); (N.B.); (P.D.); (D.F.); (E.L.-S.); (C.T.)
| | - Eline Lopez-Soler
- University Grenoble Alps, CNRS, LTM, 38000 Grenoble, France; (A.M.); (C.M.); (N.B.); (P.D.); (D.F.); (E.L.-S.); (C.T.)
- University Grenoble Alps, CEA, CNRS, Inserm, BIG-BCI, 38000 Grenoble, France; (M.C.); (D.G.-D.)
| | - Caterina Tomba
- University Grenoble Alps, CNRS, LTM, 38000 Grenoble, France; (A.M.); (C.M.); (N.B.); (P.D.); (D.F.); (E.L.-S.); (C.T.)
- University Grenoble Alps, CNRS, Grenoble INP, Institut Néel, 38000 Grenoble, France
| | - Marie Courçon
- University Grenoble Alps, CEA, CNRS, Inserm, BIG-BCI, 38000 Grenoble, France; (M.C.); (D.G.-D.)
| | - Danielle Gulino-Debrac
- University Grenoble Alps, CEA, CNRS, Inserm, BIG-BCI, 38000 Grenoble, France; (M.C.); (D.G.-D.)
| | - Héléne Delanoë-Ayari
- Université de Lyon, University Claude Bernard Lyon1, CNRS, Institut Lumière Matière, 69622 Villeurbanne, France;
| | - Alice Nicolas
- University Grenoble Alps, CNRS, LTM, 38000 Grenoble, France; (A.M.); (C.M.); (N.B.); (P.D.); (D.F.); (E.L.-S.); (C.T.)
- Correspondence:
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Abstract
Both biochemical and mechanical signals coordinate all processes at the origin of the formation of functional organs, including tissue folding, cell shape, and differentiation. In this issue of Developmental Cell, Blonski et al. establish a direct consequence of epithelial monolayer folding on nuclear shape and gene expression.
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Affiliation(s)
- Caterina Tomba
- Université de Lyon, CNRS, INSA Lyon, Ecole Centrale de Lyon, Université Claude Bernard Lyon 1, CPE Lyon, INL, UMR5270, 69622 Villeurbanne, France
| | - Aurélien Roux
- Department of Biochemistry & National Center of Competence in Research Chemical Biology, University of Geneva, 1211 Geneva, Switzerland.
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8
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Tomba C, Petithory T, Pedron R, Airoudj A, Di Meglio I, Roux A, Luchnikov V. Laser-Assisted Strain Engineering of Thin Elastomer Films to Form Variable Wavy Substrates for Cell Culture. Small 2019; 15:e1900162. [PMID: 30951243 DOI: 10.1002/smll.201900162] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 03/01/2019] [Indexed: 06/09/2023]
Abstract
Endothelial and epithelial cells usually grow on a curved environment, at the surface of organs, which many techniques have tried to reproduce. Here a simple method is proposed to control curvature of the substrate. Prestrained thin elastomer films are treated by infrared laser irradiation in order to rigidify the surface of the film. Wrinkled morphologies are produced upon stress relaxation for irradiation doses above a critical value. Wrinkle wavelength and depth are controlled by the prestrain, the laser power, and the speed at which the laser scans the film surface. Stretching of elastomer substrates with a "sand clock"-width profile enables the generation of a stress gradient, which results in patterns of wrinkles with a depth gradient. Thus, different combinations of topography changes on the same substrate can be generated. The wavelength and the depth of the wrinkles, which have the characteristic values within a range of several tens of µm, can be dynamically regulated by the substrate reversible stretching. It is shown that these anisotropic features are efficient substrates to control polarization of cell shapes and orientation of their migration. With this approach a flexible tool is provided for a wide range of applications in cell biophysics studies.
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Affiliation(s)
- Caterina Tomba
- Department of Biochemistry, University of Geneva, Quai Ernest Ansermet 30, CH-1211, Geneva, Switzerland
| | - Tatiana Petithory
- Université de Haute-Alsace, CNRS, IS2M UMR 7361, 15, Rue Jean Starcky, F-68100, Mulhouse, France
| | - Riccardo Pedron
- Université de Haute-Alsace, CNRS, IS2M UMR 7361, 15, Rue Jean Starcky, F-68100, Mulhouse, France
- Faculty of Pharmacy, University of Strasbourg, CNRS UMR 7199Laboratoire de conception et application de molécules bioactives (CAMB), équipe de Pharmacie Biogalénique, 74 Route du Rhin, 67401, Ilkirch Cedex, France
| | - Aissam Airoudj
- Université de Haute-Alsace, CNRS, IS2M UMR 7361, 15, Rue Jean Starcky, F-68100, Mulhouse, France
| | - Ilaria Di Meglio
- Department of Biochemistry, University of Geneva, Quai Ernest Ansermet 30, CH-1211, Geneva, Switzerland
| | - Aurélien Roux
- Department of Biochemistry, University of Geneva, Quai Ernest Ansermet 30, CH-1211, Geneva, Switzerland
- National Center of Competence in Research Chemical Biology, University of Geneva, Quai Ernest Ansermet 30, CH-1211, Geneva, Switzerland
| | - Valeriy Luchnikov
- Université de Haute-Alsace, CNRS, IS2M UMR 7361, 15, Rue Jean Starcky, F-68100, Mulhouse, France
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9
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Abstract
Epithelial tissues function as barriers that separate the organism from the environment. They usually have highly curved shapes, such as tubules or cysts. However, the processes by which the geometry of the environment and the cell's mechanical properties set the epithelium shape are not yet known. In this study, we encapsulated two epithelial cell lines, MDCK and J3B1A, into hollow alginate tubes and grew them under cylindrical confinement forming a complete monolayer. MDCK monolayers detached from the alginate shell at a constant rate, whereas J3B1A monolayers detached at a low rate unless the tube radius was reduced. We showed that this detachment is driven by contractile stresses in the epithelium and can be enhanced by local curvature. This allows us to conclude that J3B1A cells exhibit smaller contractility than MDCK cells. Monolayers inside curved tubes detach at a higher rate on the outside of a curve, confirming that detachment is driven by contraction.
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Affiliation(s)
- Florian A Maechler
- Department of Biochemistry, University of Geneva, CH-1211 Geneva, Switzerland
| | - Cédric Allier
- CEA, LETI, DTBS, LISA, Université Grenoble Alpes, F-38000 Grenoble, France
| | - Aurélien Roux
- Department of Biochemistry, University of Geneva, CH-1211 Geneva, Switzerland
- NCCR Chemical Biology, University of Geneva, CH-1211 Geneva, Switzerland
| | - Caterina Tomba
- Department of Biochemistry, University of Geneva, CH-1211 Geneva, Switzerland
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10
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Colom A, Derivery E, Soleimanpour S, Tomba C, Molin MD, Sakai N, González-Gaitán M, Matile S, Roux A. A fluorescent membrane tension probe. Nat Chem 2018; 10:1118-1125. [PMID: 30150727 PMCID: PMC6197433 DOI: 10.1038/s41557-018-0127-3] [Citation(s) in RCA: 262] [Impact Index Per Article: 43.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 07/25/2018] [Indexed: 12/24/2022]
Abstract
Cells and organelles are delimited by lipid bilayers in which high deformability is essential to many cell processes, including motility, endocytosis and cell division. Membrane tension is therefore a major regulator of the cell processes that remodel membranes, albeit one that is very hard to measure in vivo. Here we show that a planarizable push-pull fluorescent probe called FliptR (fluorescent lipid tension reporter) can monitor changes in membrane tension by changing its fluorescence lifetime as a function of the twist between its fluorescent groups. The fluorescence lifetime depends linearly on membrane tension within cells, enabling an easy quantification of membrane tension by fluorescence lifetime imaging microscopy. We further show, using model membranes, that this linear dependency between lifetime of the probe and membrane tension relies on a membrane-tension-dependent lipid phase separation. We also provide calibration curves that enable accurate measurement of membrane tension using fluorescence lifetime imaging microscopy.
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Affiliation(s)
- Adai Colom
- Biochemistry Department, University of Geneva, Geneva, Switzerland
- Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland
| | - Emmanuel Derivery
- Biochemistry Department, University of Geneva, Geneva, Switzerland
- Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge, UK
| | - Saeideh Soleimanpour
- Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland
| | - Caterina Tomba
- Biochemistry Department, University of Geneva, Geneva, Switzerland
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland
| | - Marta Dal Molin
- Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland
| | - Naomi Sakai
- Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland
| | - Marcos González-Gaitán
- Biochemistry Department, University of Geneva, Geneva, Switzerland
- Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland
| | - Stefan Matile
- Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland
| | - Aurélien Roux
- Biochemistry Department, University of Geneva, Geneva, Switzerland.
- Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, Switzerland.
- School of Chemistry and Biochemistry, University of Geneva, Geneva, Switzerland.
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11
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Tomba C, Braïni C, Bugnicourt G, Cohen F, Friedrich BM, Gov NS, Villard C. Geometrical Determinants of Neuronal Actin Waves. Front Cell Neurosci 2017; 11:86. [PMID: 28424590 PMCID: PMC5372798 DOI: 10.3389/fncel.2017.00086] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 03/13/2017] [Indexed: 11/19/2022] Open
Abstract
Hippocampal neurons produce in their early stages of growth propagative, actin-rich dynamical structures called actin waves. The directional motion of actin waves from the soma to the tip of neuronal extensions has been associated with net forward growth, and ultimately with the specification of neurites into axon and dendrites. Here, geometrical cues are used to control actin wave dynamics by constraining neurons on adhesive stripes of various widths. A key observable, the average time between the production of consecutive actin waves, or mean inter-wave interval (IWI), was identified. It scales with the neurite width, and more precisely with the width of the proximal segment close to the soma. In addition, the IWI is independent of the total number of neurites. These two results suggest a mechanistic model of actin wave production, by which the material conveyed by actin waves is assembled in the soma until it reaches the threshold leading to the initiation and propagation of a new actin wave. Based on these observations, we formulate a predictive theoretical description of actin wave-driven neuronal growth and polarization, which consistently accounts for different sets of experiments.
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Affiliation(s)
- Caterina Tomba
- Université Grenoble Alpes, Centre National de la Recherche Scientifique (CNRS), Institut NéelGrenoble, France.,Université Grenoble Alpes, Centre National de la Recherche Scientifique (CNRS), Laboratoire des Technologies de la Microélectronique, CEA-LETIGrenoble, France
| | - Céline Braïni
- Université Grenoble Alpes, Centre National de la Recherche Scientifique (CNRS), Institut NéelGrenoble, France.,Laboratoire PhysicoChimie Curie, Institut Curie, Pierre-Gilles de Gennes Institute for Microfluidics, CNRS, PSL Research UniversityParis, France
| | - Ghislain Bugnicourt
- Université Grenoble Alpes, Centre National de la Recherche Scientifique (CNRS), Institut NéelGrenoble, France
| | - Floriane Cohen
- Laboratoire PhysicoChimie Curie, Institut Curie, Pierre-Gilles de Gennes Institute for Microfluidics, CNRS, PSL Research UniversityParis, France
| | - Benjamin M Friedrich
- Biological Algorithms Group, Center for Advancing Electronics Dresden, Technische Universität DresdenDresden, Germany
| | - Nir S Gov
- Department of Chemical Physics, Weizmann Institute of ScienceRehovot, Israel
| | - Catherine Villard
- Université Grenoble Alpes, Centre National de la Recherche Scientifique (CNRS), Institut NéelGrenoble, France.,Laboratoire PhysicoChimie Curie, Institut Curie, Pierre-Gilles de Gennes Institute for Microfluidics, CNRS, PSL Research UniversityParis, France
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12
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Abstract
Neurons acquire their functional and morphological axo-dendritic polarity by extending, from competing minor processes (neurites), one long axon among numerous dendrites. We employed complementary sets of micropatterns built from 2 and 6 μm wide stripes of various lengths to constrain hippocampal neuron shapes. Using these geometries, we have (i) limited the number of neuronal extensions to obtain a minimal in vitro system of bipolar neurons and (ii) controlled the neurite width during growth by the generation of a progressive cell shape asymmetry on either side of the cellular body. From this geometrical approach, we gained a high level of control of each neurite length and of the localization of axonal specification. To analyze these results, we developed a model based on a width and polarization dependent neurite elongation rate and on the existence of a critical neurite length that sets the axonal fate. Our data on the four series of micro-patterns developed for this study are described by a single set of growth parameters, well supported by experiments. The control of neuronal shapes by adhesive micro-patterns thereby offers a novel paradigm to follow the dynamical process of neurite lengthening and competition through the process of axonal polarization.
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Affiliation(s)
- Caterina Tomba
- Univ. Grenoble Alpes, Inst NEEL and CRETA, F-38042 Grenoble, France
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13
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Tomba C, Baldassarri A, Coletta M, Cesana BM, Basilisco G. Is the subjective perception of lactose intolerance influenced by the psychological profile? Aliment Pharmacol Ther 2012; 36:660-9. [PMID: 22860690 DOI: 10.1111/apt.12006] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Revised: 02/20/2012] [Accepted: 07/15/2012] [Indexed: 12/28/2022]
Abstract
BACKGROUND Symptoms of lactose intolerance are often attributed to lactose malabsorption but, as this relationship has not been demonstrated when a small dose of lactose similar to that contained in one cup of milk is ingested by intolerant patients, psychological factors may play a role in altered symptom perception. AIM To assess the hypothesis that the psychological profile influences the symptoms of lactose intolerance. METHODS One hundred and two consecutive patients underwent a 15 g lactose hydrogen breath test to assess lactose malabsorption. The patients recorded the presence and severity of symptoms of lactose intolerance during the breath test using visual analogue scales. The psychological profile was assessed using a psychological symptom checklist, and health-related quality of life by means of the short-form health survey. RESULTS Lactose malabsorption and intolerance were diagnosed in, respectively, 18% and 29% of the patients. The two conditions were not associated, and the severity of intolerance was even less in the patients with malabsorption. Multivariate logistic analysis showed that a high somatisation t-score was significantly associated with lactose intolerance (odds ratio 4.184; 1.704-10.309); the effects of the other psychological variables and of lactose malabsorption were not statistically significant. Health-related quality of life was significantly reduced in the patients with somatisation, but not in those with lactose malabsorption. CONCLUSIONS The symptoms of lactose intolerance during hydrogen breath testing at a low physiological lactose load, are unrelated to lactose malabsorption, but may reveal a tendency towards somatisation that could impair the quality of life.
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Affiliation(s)
- C Tomba
- Post-graduate School of Gastroenterology, Università degli Studi di Milano, Milan, Italy
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14
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Abstract
BACKGROUND A discrepancy between recalled and recorded bowel habit subtypes has been reported in irritable bowel syndrome (IBS), but the reasons for it remain unclear. AIM To assess the agreement between recalled and recorded bowel habit subtypes; to determine whether any discrepancy is related to stool form variability or psychological factors; and to test the correlations of recalled and recorded stool form with colonic transit time. METHODS Bowel habit subtype was established in 54 IBS patients at the enrolment visit (recalled) and with the aid of diary cards (recorded). Colonic transit time, the variability of stool form and the patients' psychological profiles were also recorded. RESULTS Recalled and recorded bowel habit subtypes agreed in only 54% of the patients (kappa = 0.28). Stool form variability was greater among the patients whose recalled and recorded bowel habit subtypes were discordant (P = 0.03), whereas the psychological profiles were not different. Colonic transit time significantly correlated with stool form only when it was recorded on diary cards. CONCLUSION The discrepancy between recalled and recorded bowel habits in IBS patients is related more to stool form variability than an altered psychological profile. Diary cards should be used to ensure that stool form reflects colonic transit time.
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Affiliation(s)
- M Coletta
- Postgraduate School of Gastroenterology, Università degli Studi di Milano, Gastroenterology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
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