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Kimball EE, Rousseau B. Mechanotransduction in the Vocal Fold Microenvironment: A Narrative Review. JOURNAL OF SPEECH, LANGUAGE, AND HEARING RESEARCH : JSLHR 2024; 67:2128-2138. [PMID: 38865255 DOI: 10.1044/2024_jslhr-23-00718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2024]
Abstract
PURPOSE The vocal fold tissues undergo nearly continuous and repeated cycles of injury and repair throughout the course of an individual's lifetime. It is well established that certain individuals are at greater risk of lesion development based on personality and behavioral classification. However, these characteristics alone do not wholly predict or explain lesion development or severity. In this review, we discuss current knowledge of mechanotransduction proteins and their potential relevance to tissue homeostasis in the vocal folds. METHOD A review of literature surrounding mechanotransduction and tissue homeostasis as it relates to the vocal folds was conducted. Review of the literature included searches of PubMed, Google Scholar, and other various online peer-reviewed sources. Search terms pertained to mechanosensation, mechanotransduction, mechanically activated channels, mechanical cellular regulation, and other associated concepts and terms. Additional literature was identified through the reference lists of identified papers. Findings of this literature review were then applied to known physiology and pathophysiology of the vocal folds in order to speculate on the contribution of mechanically mediated mechanisms within the vocal fold. DISCUSSION AND CONCLUSION Because the vocal folds are such mechanically active structures, withstanding nearly constant external forces, there is strong support for the idea that mechanically sensitive molecular pathways within the vocal fold tissue play a major role in tissue homeostasis in the presence of these considerable forces. As such, mechanotransduction within the vocal fold should be considered and targeted in future biological studies of vocal fold physiology.
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Affiliation(s)
- Emily E Kimball
- Department of Hearing and Speech Sciences, Department of Otolaryngology - Head and Neck Surgery, Vanderbilt University Medical Center, Nashville, TN
| | - Bernard Rousseau
- Doisy College of Health Sciences, Saint Louis University, St. Louis, MO
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2
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Shi L, Lim JY, Kam LC. Improving regulatory T cell production through mechanosensing. J Biomed Mater Res A 2024; 112:1138-1148. [PMID: 38450935 PMCID: PMC11065567 DOI: 10.1002/jbm.a.37702] [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: 12/22/2023] [Revised: 02/19/2024] [Accepted: 02/26/2024] [Indexed: 03/08/2024]
Abstract
Induced Tregs (iTregs) have great promise in adoptive immunotherapy for treatment of autoimmune diseases. This report investigates the impacts of substrate stiffness on human Treg induction, providing a powerful yet simple approach to improving production of these cells. Conventional CD4+ human T cells were activated on materials of different elastic modulus and cultured under suppressive conditions. Enhanced Treg induction was observed on softer materials as early as 3 days following activation and persisted for multiple weeks. Substrate stiffness also affected epigenetic modification of Treg specific genes and Treg suppressive capacity. Tregs induced on substrates of an optimal stiffness balance quantity and suppressive quality.
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Affiliation(s)
- Lingting Shi
- Department of Biomedical Engineering, Columbia University, New York, NY, 10027, USA
| | - Jee Yoon Lim
- Department of Biological Sciences, Columbia University, New York, NY, 10027, USA
| | - Lance C. Kam
- Department of Biomedical Engineering, Columbia University, New York, NY, 10027, USA
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3
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Pardo A, Gomez-Florit M, Davidson MD, Öztürk-Öncel MÖ, Domingues RMA, Burdick JA, Gomes ME. Hierarchical Design of Tissue-Mimetic Fibrillar Hydrogel Scaffolds. Adv Healthc Mater 2024; 13:e2303167. [PMID: 38400658 PMCID: PMC11209813 DOI: 10.1002/adhm.202303167] [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: 09/20/2023] [Revised: 02/05/2024] [Indexed: 02/25/2024]
Abstract
Most tissues of the human body present hierarchical fibrillar extracellular matrices (ECMs) that have a strong influence over their physicochemical properties and biological behavior. Of great interest is the introduction of this fibrillar structure to hydrogels, particularly due to the water-rich composition, cytocompatibility, and tunable properties of this class of biomaterials. Here, the main bottom-up fabrication strategies for the design and production of hierarchical biomimetic fibrillar hydrogels and their most representative applications in the fields of tissue engineering and regenerative medicine are reviewed. For example, the controlled assembly/arrangement of peptides, polymeric micelles, cellulose nanoparticles (NPs), and magnetically responsive nanostructures, among others, into fibrillar hydrogels is discussed, as well as their potential use as fibrillar-like hydrogels (e.g., those from cellulose NPs) with key biofunctionalities such as electrical conductivity or remote stimulation. Finally, the major remaining barriers to the clinical translation of fibrillar hydrogels and potential future directions of research in this field are discussed.
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Affiliation(s)
- Alberto Pardo
- 3B’s Research Group I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics University of Minho Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine AvePark - Parque de Ciência e Tecnologia Zona Industrial da Gandra Barco, Guimarães 4805-017, Portugal; ICVS/3B’s - PT Government Associate Laboratory Braga/Guimarães, Portugal; Colloids and Polymers Physics Group, Particle Physics Department, Materials Institute (iMATUS), and Health Research Institute (IDIS), University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Manuel Gomez-Florit
- Group of Cell Therapy and Tissue Engineering (TERCIT), Research Institute on Health Sciences (IUNICS), University of the Balearic Islands (UIB), Ctra. Valldemossa km 7.5, 07122 Palma, Spain
| | - Matthew D. Davidson
- BioFrontiers Institute and Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder, CO 80303, USA
| | - M. Özgen Öztürk-Öncel
- 3B’s Research Group I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics University of Minho Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine AvePark - Parque de Ciência e Tecnologia Zona Industrial da Gandra Barco, Guimarães 4805-017, Portugal; ICVS/3B’s - PT Government Associate Laboratory Braga/Guimarães, Portugal
| | - Rui M. A. Domingues
- 3B’s Research Group I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics University of Minho Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine AvePark - Parque de Ciência e Tecnologia Zona Industrial da Gandra Barco, Guimarães 4805-017, Portugal; ICVS/3B’s - PT Government Associate Laboratory Braga/Guimarães, Portugal
| | - Jason A. Burdick
- BioFrontiers Institute and Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder, CO 80303, USA
| | - Manuela E. Gomes
- 3B’s Research Group I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics University of Minho Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine AvePark - Parque de Ciência e Tecnologia Zona Industrial da Gandra Barco, Guimarães 4805-017, Portugal; ICVS/3B’s - PT Government Associate Laboratory Braga/Guimarães, Portugal
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4
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Schwegler N, Gebert T, Villiou M, Colombo F, Schamberger B, Selhuber-Unkel C, Thomas F, Blasco E. Multimaterial 3D Laser Printing of Cell-Adhesive and Cell-Repellent Hydrogels. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2401344. [PMID: 38708807 DOI: 10.1002/smll.202401344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Indexed: 05/07/2024]
Abstract
Here, a straightforward method is reported for manufacturing 3D microstructured cell-adhesive and cell-repellent multimaterials using two-photon laser printing. Compared to existing strategies, this approach offers bottom-up molecular control, high customizability, and rapid and precise 3D fabrication. The printable cell-adhesive polyethylene glycol (PEG) based material includes an Arg-Gly-Asp (RGD) containing peptide synthesized through solid-phase peptide synthesis, allowing for precise control of the peptide design. Remarkably, minimal amounts of RGD peptide (< 0.1 wt%) suffice for imparting cell-adhesiveness, while maintaining identical mechanical properties in the 3D printed microstructures to those of the cell-repellent, PEG-based material. Fluorescent labeling of the RGD peptide facilitates visualization of its presence in cell-adhesive areas. To demonstrate the broad applicability of the system, the fabrication of cell-adhesive 2.5D and 3D structures is shown, fostering the adhesion of fibroblast cells within these architectures. Thus, this approach allows for the printing of high-resolution, true 3D structures suitable for diverse applications, including cellular studies in complex environments.
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Affiliation(s)
- Niklas Schwegler
- Institute for Molecular Systems Engineering and Advanced Materials, Heidelberg University, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany
- Institute of Organic Chemistry, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Tanisha Gebert
- Institute for Molecular Systems Engineering and Advanced Materials, Heidelberg University, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany
| | - Maria Villiou
- Institute for Molecular Systems Engineering and Advanced Materials, Heidelberg University, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany
| | - Federico Colombo
- Institute for Molecular Systems Engineering and Advanced Materials, Heidelberg University, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany
| | - Barbara Schamberger
- Institute for Molecular Systems Engineering and Advanced Materials, Heidelberg University, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany
| | - Christine Selhuber-Unkel
- Institute for Molecular Systems Engineering and Advanced Materials, Heidelberg University, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany
| | - Franziska Thomas
- Institute of Organic Chemistry, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Eva Blasco
- Institute for Molecular Systems Engineering and Advanced Materials, Heidelberg University, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany
- Institute of Organic Chemistry, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
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5
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Fanelli G, Alloisio G, Lelli V, Marini S, Rinalducci S, Gioia M. Mechano-induced cell metabolism disrupts the oxidative stress homeostasis of SAOS-2 osteosarcoma cells. Front Mol Biosci 2024; 10:1297826. [PMID: 38726050 PMCID: PMC11079223 DOI: 10.3389/fmolb.2023.1297826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 12/18/2023] [Indexed: 05/12/2024] Open
Abstract
There has been an increasing focus on cancer mechanobiology, determining the underlying-induced changes to unlock new avenues in the modulation of cell malignancy. Our study used LC-MS untargeted metabolomic approaches and real-time polymerase chain reaction (PCR) to characterize the molecular changes induced by a specific moderate uniaxial stretch regimen (i.e., 24 h-1 Hz, cyclic stretch 0,5% elongation) on SAOS-2 osteosarcoma cells. Differential metabolic pathway analysis revealed that the mechanical stimulation induces a downregulation of both glycolysis and the tricarboxylic acid (TCA) cycle. At the same time, the amino acid metabolism was found to be dysregulated, with the mechanical stimulation enhancing glutaminolysis and reducing the methionine cycle. Our findings showed that cell metabolism and oxidative defense are tightly intertwined in mechanically stimulated cells. On the one hand, the mechano-induced disruption of the energy cell metabolism was found correlated with an antioxidant glutathione (GSH) depletion and an accumulation of reactive oxygen species (ROS). On the other hand, we showed that a moderate stretch regimen could disrupt the cytoprotective gene transcription by altering the expression levels of manganese superoxide dismutase (SOD1), Sirtuin 1 (SIRT1), and NF-E2-related factor 2 (Nrf2) genes. Interestingly, the cyclic applied strain could induce a cytotoxic sensitization (to the doxorubicin-induced cell death), suggesting that mechanical signals are integral regulators of cell cytoprotection. Hence, focusing on the mechanosensitive system as a therapeutic approach could potentially result in more effective treatments for osteosarcoma in the future.
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Affiliation(s)
- Giuseppina Fanelli
- Department of Ecological and Biological Sciences (DEB), University of Tuscia, Viterbo, Italy
| | - Giulia Alloisio
- Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Rome, Italy
| | - Veronica Lelli
- Department of Ecological and Biological Sciences (DEB), University of Tuscia, Viterbo, Italy
| | - Stefano Marini
- Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Rome, Italy
| | - Sara Rinalducci
- Department of Ecological and Biological Sciences (DEB), University of Tuscia, Viterbo, Italy
| | - Magda Gioia
- Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Rome, Italy
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Stommen A, Ghodsi M, Cloos AS, Conrard L, Dumitru AC, Henriet P, Pierreux CE, Alsteens D, Tyteca D. Piezo1 Regulation Involves Lipid Domains and the Cytoskeleton and Is Favored by the Stomatocyte-Discocyte-Echinocyte Transformation. Biomolecules 2023; 14:51. [PMID: 38254651 PMCID: PMC10813235 DOI: 10.3390/biom14010051] [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: 11/15/2023] [Revised: 12/22/2023] [Accepted: 12/23/2023] [Indexed: 01/24/2024] Open
Abstract
Piezo1 is a mechanosensitive ion channel required for various biological processes, but its regulation remains poorly understood. Here, we used erythrocytes to address this question since they display Piezo1 clusters, a strong and dynamic cytoskeleton and three types of submicrometric lipid domains, respectively enriched in cholesterol, GM1 ganglioside/cholesterol and sphingomyelin/cholesterol. We revealed that Piezo1 clusters were present in both the rim and the dimple erythrocyte regions. Upon Piezo1 chemical activation by Yoda1, the Piezo1 cluster proportion mainly increased in the dimple area. This increase was accompanied by Ca2+ influx and a rise in echinocytes, in GM1/cholesterol-enriched domains in the dimple and in cholesterol-enriched domains in the rim. Conversely, the effects of Piezo1 activation were abrogated upon membrane cholesterol depletion. Furthermore, upon Piezo1-independent Ca2+ influx, the above changes were not observed. In healthy donors with a high echinocyte proportion, Ca2+ influx, lipid domains and Piezo1 fluorescence were high even at resting state, whereas the cytoskeleton membrane occupancy was lower. Accordingly, upon decreases in cytoskeleton membrane occupancy and stiffness in erythrocytes from patients with hereditary spherocytosis, Piezo1 fluorescence was increased. Altogether, we showed that Piezo1 was differentially controlled by lipid domains and the cytoskeleton and was favored by the stomatocyte-discocyte-echinocyte transformation.
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Affiliation(s)
- Amaury Stommen
- CELL Unit and PICT Platform, de Duve Institute, UCLouvain, 1200 Brussels, Belgium; (A.S.); (M.G.); (A.-S.C.); (P.H.); (C.E.P.)
| | - Marine Ghodsi
- CELL Unit and PICT Platform, de Duve Institute, UCLouvain, 1200 Brussels, Belgium; (A.S.); (M.G.); (A.-S.C.); (P.H.); (C.E.P.)
| | - Anne-Sophie Cloos
- CELL Unit and PICT Platform, de Duve Institute, UCLouvain, 1200 Brussels, Belgium; (A.S.); (M.G.); (A.-S.C.); (P.H.); (C.E.P.)
| | - Louise Conrard
- Center for Microscopy and Molecular Imaging (CMMI), Biopark Charleroi, Université Libre de Bruxelles, 6041 Gosselies, Belgium;
| | - Andra C. Dumitru
- Louvain Institute of Biomolecular Science and Technology, UCLouvain, 1348 Louvain-la-Neuve, Belgium (D.A.)
| | - Patrick Henriet
- CELL Unit and PICT Platform, de Duve Institute, UCLouvain, 1200 Brussels, Belgium; (A.S.); (M.G.); (A.-S.C.); (P.H.); (C.E.P.)
| | - Christophe E. Pierreux
- CELL Unit and PICT Platform, de Duve Institute, UCLouvain, 1200 Brussels, Belgium; (A.S.); (M.G.); (A.-S.C.); (P.H.); (C.E.P.)
| | - David Alsteens
- Louvain Institute of Biomolecular Science and Technology, UCLouvain, 1348 Louvain-la-Neuve, Belgium (D.A.)
| | - Donatienne Tyteca
- CELL Unit and PICT Platform, de Duve Institute, UCLouvain, 1200 Brussels, Belgium; (A.S.); (M.G.); (A.-S.C.); (P.H.); (C.E.P.)
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7
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Ambattu LA, Yeo LY. Sonomechanobiology: Vibrational stimulation of cells and its therapeutic implications. BIOPHYSICS REVIEWS 2023; 4:021301. [PMID: 38504927 PMCID: PMC10903386 DOI: 10.1063/5.0127122] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 02/27/2023] [Indexed: 03/21/2024]
Abstract
All cells possess an innate ability to respond to a range of mechanical stimuli through their complex internal machinery. This comprises various mechanosensory elements that detect these mechanical cues and diverse cytoskeletal structures that transmit the force to different parts of the cell, where they are transcribed into complex transcriptomic and signaling events that determine their response and fate. In contrast to static (or steady) mechanostimuli primarily involving constant-force loading such as compression, tension, and shear (or forces applied at very low oscillatory frequencies (≤ 1 Hz) that essentially render their effects quasi-static), dynamic mechanostimuli comprising more complex vibrational forms (e.g., time-dependent, i.e., periodic, forcing) at higher frequencies are less well understood in comparison. We review the mechanotransductive processes associated with such acoustic forcing, typically at ultrasonic frequencies (> 20 kHz), and discuss the various applications that arise from the cellular responses that are generated, particularly for regenerative therapeutics, such as exosome biogenesis, stem cell differentiation, and endothelial barrier modulation. Finally, we offer perspectives on the possible existence of a universal mechanism that is common across all forms of acoustically driven mechanostimuli that underscores the central role of the cell membrane as the key effector, and calcium as the dominant second messenger, in the mechanotransduction process.
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Affiliation(s)
- Lizebona August Ambattu
- Micro/Nanophysics Research Laboratory, School of Engineering, RMIT University, Melbourne VIC 3000, Australia
| | - Leslie Y. Yeo
- Micro/Nanophysics Research Laboratory, School of Engineering, RMIT University, Melbourne VIC 3000, Australia
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Hagelaars MJ, Rijns L, Dankers PYW, Loerakker S, Bouten CVC. Engineering Strategies to Move from Understanding to Steering Renal Tubulogenesis. TISSUE ENGINEERING. PART B, REVIEWS 2023; 29:203-216. [PMID: 36173101 DOI: 10.1089/ten.teb.2022.0120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Rebuilding the kidney in the context of tissue engineering offers a major challenge as the organ is structurally complex and has a high variety of specific functions. Recreation of kidney function is inherently connected to the formation of tubules since the functional subunit of the kidney, the nephron, is based on tubular structures. In vivo, tubulogenesis culminates in a perfectly shaped, patterned, and functional renal tubule via different morphogenic processes that depend on delicately orchestrated chemical, physical, and mechanical interactions between cells and between cells and their microenvironment. This review summarizes the current understanding of the role of the microenvironment in the morphogenic processes involved in in vivo renal tubulogenesis. We highlight the current state-of-the-art of renal tubular engineering and provide a view on the design elements that can be extracted from these studies. Next, we discuss how computational modeling can aid in specifying and identifying design parameters and provide directions on how these design parameters can be incorporated in biomaterials for the purpose of engineering renal tubulogenesis. Finally, we propose that a step-by-step reciprocal interaction between understanding and engineering is necessary to effectively guide renal tubulogenesis. Impact statement Tubular tissue engineering lies at the foundation of regenerating kidney tissue function, as the functional subunit of the kidney, the nephron, is based on tubular structures. Guiding renal tubulogenesis toward functional renal tubules requires in-depth knowledge of the developmental processes that lead to the formation of native tubules as well as engineering approaches to steer these processes. In this study, we review the role of the microenvironment in the developmental processes that lead to functional renal tubules and give directions how this knowledge can be harnessed for biomaterial-based tubular engineering using computational models.
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Affiliation(s)
- Maria J Hagelaars
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
- Institute for Complex Molecular Systems (ICMS), Eindhoven, The Netherlands
| | - Laura Rijns
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
- Institute for Complex Molecular Systems (ICMS), Eindhoven, The Netherlands
| | - Patricia Y W Dankers
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
- Institute for Complex Molecular Systems (ICMS), Eindhoven, The Netherlands
| | - Sandra Loerakker
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
- Institute for Complex Molecular Systems (ICMS), Eindhoven, The Netherlands
| | - Carlijn V C Bouten
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
- Institute for Complex Molecular Systems (ICMS), Eindhoven, The Netherlands
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9
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Alloisio G, Rodriguez DB, Luce M, Ciaccio C, Marini S, Cricenti A, Gioia M. Cyclic Stretch-Induced Mechanical Stress Applied at 1 Hz Frequency Can Alter the Metastatic Potential Properties of SAOS-2 Osteosarcoma Cells. Int J Mol Sci 2023; 24:ijms24097686. [PMID: 37175397 PMCID: PMC10178551 DOI: 10.3390/ijms24097686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/18/2023] [Accepted: 04/20/2023] [Indexed: 05/15/2023] Open
Abstract
Recently, there has been an increasing focus on cellular morphology and mechanical behavior in order to gain a better understanding of the modulation of cell malignancy. This study used uniaxial-stretching technology to select a mechanical regimen able to elevate SAOS-2 cell migration, which is crucial in osteosarcoma cell pathology. Using confocal and atomic force microscopy, we demonstrated that a 24 h 0.5% cyclic elongation applied at 1 Hz induces morphological changes in cells. Following mechanical stimulation, the cell area enlarged, developing a more elongated shape, which disrupted the initial nuclear-to-cytoplasm ratio. The peripheral cell surface also increased its roughness. Cell-based biochemical assays and real-time PCR quantification showed that these morphologically induced changes are unrelated to the osteoblastic differentiative grade. Interestingly, two essential cell-motility properties in the modulation of the metastatic process changed following the 24 h 1 Hz mechanical stimulation. These were cell adhesion and cell migration, which, in fact, were dampened and enhanced, respectively. Notably, our results showed that the stretch-induced up-regulation of cell motility occurs through a mechanism that does not depend on matrix metalloproteinase (MMP) activity, while the inhibition of ion-stretch channels could counteract it. Overall, our results suggest that further research on mechanobiology could represent an alternative approach for the identification of novel molecular targets of osteosarcoma cell malignancy.
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Affiliation(s)
- Giulia Alloisio
- Department of Clinical Sciences and Translational Medicine, University of Rome 'Tor Vergata', Via Montpellier 1, I-00133 Rome, Italy
| | - David Becerril Rodriguez
- Institute of Structure Matter del Consiglio Nazionale delle Ricerche ISM-CNR, Via del Fosso del Cavaliere 100, I-00133 Rome, Italy
| | - Marco Luce
- Institute of Structure Matter del Consiglio Nazionale delle Ricerche ISM-CNR, Via del Fosso del Cavaliere 100, I-00133 Rome, Italy
| | - Chiara Ciaccio
- Department of Clinical Sciences and Translational Medicine, University of Rome 'Tor Vergata', Via Montpellier 1, I-00133 Rome, Italy
| | - Stefano Marini
- Department of Clinical Sciences and Translational Medicine, University of Rome 'Tor Vergata', Via Montpellier 1, I-00133 Rome, Italy
| | - Antonio Cricenti
- Institute of Structure Matter del Consiglio Nazionale delle Ricerche ISM-CNR, Via del Fosso del Cavaliere 100, I-00133 Rome, Italy
| | - Magda Gioia
- Department of Clinical Sciences and Translational Medicine, University of Rome 'Tor Vergata', Via Montpellier 1, I-00133 Rome, Italy
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10
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Liao X, Li X, Liu R. Extracellular-matrix mechanics regulate cellular metabolism: A ninja warrior behind mechano-chemo signaling crosstalk. Rev Endocr Metab Disord 2023; 24:207-220. [PMID: 36385696 DOI: 10.1007/s11154-022-09768-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/21/2022] [Indexed: 11/18/2022]
Abstract
Mechanical forces are the indispensable constituent of environmental cues, such as gravity, barometric pressure, vibration, and contact with bodies, which are involved in pattern and organogenesis, providing mechanical input to tissues and determining the ultimate fate of cells. Extracellular matrix (ECM) stiffness, the slow elastic force, carries the external physical force load onto the cell or outputs the internal force exerted by the cell and its neighbors into the environment. Accumulating evidence illustrates the pivotal role of ECM stiffness in the regulation of organogenesis, maintenance of tissue homeostasis, and the development of multiple diseases, which is largely fulfilled through its systematical impact on cellular metabolism. This review summarizes the establishment and regulation of ECM stiffness, the mechanisms underlying how ECM stiffness is sensed by cells and signals to modulate diverse cell metabolic pathways, and the physiological and pathological significance of the ECM stiffness-cell metabolism axis.
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Affiliation(s)
- Xiaoyu Liao
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, 14, Section 3, Renminnan Road, Chengdu, 610041, Sichuan, China
| | - Xin Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, 14, Section 3, Renminnan Road, Chengdu, 610041, Sichuan, China
| | - Rui Liu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, 14, Section 3, Renminnan Road, Chengdu, 610041, Sichuan, China.
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11
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Haage A, Dhasarathy A. Working a second job: Cell adhesion proteins that moonlight in the nucleus. Front Cell Dev Biol 2023; 11:1163553. [PMID: 37169022 PMCID: PMC10164977 DOI: 10.3389/fcell.2023.1163553] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 04/12/2023] [Indexed: 05/13/2023] Open
Abstract
Cells are adept at sensing changes in their environment, transmitting signals internally to coordinate responses to external stimuli, and thereby influencing adaptive changes in cell states and behavior. Often, this response involves modulation of gene expression in the nucleus, which is seen largely as a physically separated process from the rest of the cell. Mechanosensing, whereby a cell senses physical stimuli, and integrates and converts these inputs into downstream responses including signaling cascades and gene regulatory changes, involves the participation of several macromolecular structures. Of note, the extracellular matrix (ECM) and its constituent macromolecules comprise an essential part of the cellular microenvironment, allowing cells to interact with each other, and providing both structural and biochemical stimuli sensed by adhesion transmembrane receptors. This highway of information between the ECM, cell adhesion proteins, and the cytoskeleton regulates cellular behavior, the disruption of which results in disease. Emerging evidence suggests a more direct role for some of these adhesion proteins in chromatin structure and gene regulation, RNA maturation and other non-canonical functions. While many of these discoveries were previously limited to observations of cytoplasmic-nuclear transport, recent advances in microscopy, and biochemical, proteomic and genomic technologies have begun to significantly enhance our understanding of the impact of nuclear localization of these proteins. This review will briefly cover known cell adhesion proteins that migrate to the nucleus, and their downstream functions. We will outline recent advances in this very exciting yet still emerging field, with impact ranging from basic biology to disease states like cancer.
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Affiliation(s)
- Amanda Haage
- *Correspondence: Amanda Haage, ; Archana Dhasarathy,
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12
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Zhang Y, Habibovic P. Delivering Mechanical Stimulation to Cells: State of the Art in Materials and Devices Design. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2110267. [PMID: 35385176 DOI: 10.1002/adma.202110267] [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: 12/16/2021] [Revised: 03/19/2022] [Indexed: 06/14/2023]
Abstract
Biochemical signals, such as growth factors, cytokines, and transcription factors are known to play a crucial role in regulating a variety of cellular activities as well as maintaining the normal function of different tissues and organs. If the biochemical signals are assumed to be one side of the coin, the other side comprises biophysical cues. There is growing evidence showing that biophysical signals, and in particular mechanical cues, also play an important role in different stages of human life ranging from morphogenesis during embryonic development to maturation and maintenance of tissue and organ function throughout life. In order to investigate how mechanical signals influence cell and tissue function, tremendous efforts have been devoted to fabricating various materials and devices for delivering mechanical stimuli to cells and tissues. Here, an overview of the current state of the art in the design and development of such materials and devices is provided, with a focus on their design principles, and challenges and perspectives for future research directions are highlighted.
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Affiliation(s)
- Yonggang Zhang
- Department of Instructive Biomaterials Engineering, Maastricht University, MERLN Institute for Technology-Inspired Regenerative Medicine, Universiteitssingel 40, Maastricht, 6229 ER, The Netherlands
| | - Pamela Habibovic
- Department of Instructive Biomaterials Engineering, Maastricht University, MERLN Institute for Technology-Inspired Regenerative Medicine, Universiteitssingel 40, Maastricht, 6229 ER, The Netherlands
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13
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So CL, Meinert C, Xia Q, Robitaille M, Roberts-Thomson SJ, Monteith GR. Increased matrix stiffness suppresses ATP-induced sustained Ca2+ influx in MDA-MB-231 breast cancer cells. Cell Calcium 2022; 104:102569. [DOI: 10.1016/j.ceca.2022.102569] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 02/07/2022] [Accepted: 03/01/2022] [Indexed: 12/13/2022]
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14
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Morsczeck C. Mechanisms during Osteogenic Differentiation in Human Dental Follicle Cells. Int J Mol Sci 2022; 23:ijms23115945. [PMID: 35682637 PMCID: PMC9180518 DOI: 10.3390/ijms23115945] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 05/19/2022] [Accepted: 05/23/2022] [Indexed: 12/22/2022] Open
Abstract
Human dental follicle cells (DFCs) as periodontal progenitor cells are used for studies and research in regenerative medicine and not only in dentistry. Even if innovative regenerative therapies in medicine are often considered the main research area for dental stem cells, these cells are also very useful in basic research and here, for example, for the elucidation of molecular processes in the differentiation into mineralizing cells. This article summarizes the molecular mechanisms driving osteogenic differentiation of DFCs. The positive feedback loop of bone morphogenetic protein (BMP) 2 and homeobox protein DLX3 and a signaling pathway associated with protein kinase B (AKT) and protein kinase C (PKC) are presented and further insights related to other signaling pathways such as the WNT signaling pathway are explained. Subsequently, some works are presented that have investigated epigenetic modifications and non-coding ncRNAs and their connection with the osteogenic differentiation of DFCs. In addition, studies are presented that have shown the influence of extracellular matrix molecules or fundamental biological processes such as cellular senescence on osteogenic differentiation. The putative role of factors associated with inflammatory processes, such as interleukin 8, in osteogenic differentiation is also briefly discussed. This article summarizes the most important insights into the mechanisms of osteogenic differentiation in DFCs and is intended to be a small help in the direction of new research projects in this area.
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Affiliation(s)
- Christian Morsczeck
- Department of Oral and Maxillofacial Surgery, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany
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15
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Vakhrusheva A, Murashko A, Trifonova E, Efremov Y, Timashev P, Sokolova O. Role of Actin-binding Proteins in the Regulation of Cellular Mechanics. Eur J Cell Biol 2022; 101:151241. [DOI: 10.1016/j.ejcb.2022.151241] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 04/18/2022] [Accepted: 05/19/2022] [Indexed: 12/25/2022] Open
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16
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Li H, Matsunaga D, Matsui TS, Aosaki H, Kinoshita G, Inoue K, Doostmohammadi A, Deguchi S. Wrinkle force microscopy: a machine learning based approach to predict cell mechanics from images. Commun Biol 2022; 5:361. [PMID: 35422083 PMCID: PMC9010416 DOI: 10.1038/s42003-022-03288-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 03/17/2022] [Indexed: 11/10/2022] Open
Abstract
Combining experiments with artificial intelligence algorithms, we propose a machine learning based approach called wrinkle force microscopy (WFM) to extract the cellular force distributions from the microscope images. The full process can be divided into three steps. First, we culture the cells on a special substrate allowing to measure both the cellular traction force on the substrate and the corresponding substrate wrinkles simultaneously. The cellular forces are obtained using the traction force microscopy (TFM), at the same time that cell-generated contractile forces wrinkle their underlying substrate. Second, the wrinkle positions are extracted from the microscope images. Third, we train the machine learning system with GAN (generative adversarial network) by using sets of corresponding two images, the traction field and the input images (raw microscope images or extracted wrinkle images), as the training data. The network understands the way to convert the input images of the substrate wrinkles to the traction distribution from the training. After sufficient training, the network is utilized to predict the cellular forces just from the input images. Our system provides a powerful tool to evaluate the cellular forces efficiently because the forces can be predicted just by observing the cells under the microscope, which is much simpler method compared to the TFM experiment. Additionally, the machine learning based approach presented here has the profound potential for being applied to diverse cellular assays for studying mechanobiology of cells. A deep learning approach, termed wrinkle force microscopy, allows for conducting traction force microscopy by observing bright-field cell images but without using its conventional requirements such as fluorescent microbeads and confocal microscopy.
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17
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Aprile P, Whelan IT, Sathy BN, Carroll SF, Kelly DJ. Soft Hydrogel Environments that Facilitate Cell Spreading and Aggregation Preferentially Support Chondrogenesis of Adult Stem Cells. Macromol Biosci 2022; 22:e2100365. [PMID: 35171524 DOI: 10.1002/mabi.202100365] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 01/14/2022] [Indexed: 11/10/2022]
Abstract
Mesenchymal stem/stromal cells (MSCs) represent a promising cell type for treating damaged and diseased synovial joints. The therapeutic potential of MSCs will be facilitated by the engineering of biomaterial environments capable of directing their fate. Here we explored the interplay between matrix elasticity and cell morphology in regulating the chondrogenic differentiation of MSCs when seeded onto or encapsulated within hydrogels made of interpenetrating networks (IPN) of alginate and collagen type I. This IPN system enabled the independent control of substrate stiffness (in 2D and in 3D) and cell morphology (3D only). In a 2D culture environment, the expression of chondrogenic markers SOX9, ACAN and COL2 increased on a soft substrate, which correlated with increased SMAD2/3 nuclear localization, enhanced MSCs condensation and the formation of larger cellular aggregates. The encapsulation of spread MSCs within a soft IPN dramatically increased the expression of cartilage-specific genes, which was linked to higher levels of cellular condensation and nuclear SMAD2/3 localization. Surprisingly, cells forced to adopt a more rounded morphology within the same soft IPNs expressed higher levels of the osteogenic markers RUNX2 and COL1. The insight provided by this study suggests that a mechanobiology informed approach to biomaterial development will be integral to the development of successful cartilage tissue engineering strategies. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Paola Aprile
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.,Department of Mechanical, Manufacturing and Biomedical Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland
| | - Ian T Whelan
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.,Department of Mechanical, Manufacturing and Biomedical Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland.,CÚRAM Center for Research in Medical Devices, National University of Ireland, Galway, Ireland
| | - Binulal N Sathy
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.,Department of Mechanical, Manufacturing and Biomedical Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland.,Centre for Nanoscience and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi, India
| | - Simon F Carroll
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.,Department of Mechanical, Manufacturing and Biomedical Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland
| | - Daniel J Kelly
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.,Department of Mechanical, Manufacturing and Biomedical Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland.,CÚRAM Center for Research in Medical Devices, National University of Ireland, Galway, Ireland.,The Department of Anatomy and Regenerative Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland.,Advanced Materials and Bioengineering Research (AMBER) Centre, Trinity College Dublin, Ireland
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18
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Mechanical Regulation of Limb Bud Formation. Cells 2022; 11:cells11030420. [PMID: 35159230 PMCID: PMC8834596 DOI: 10.3390/cells11030420] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/20/2022] [Accepted: 01/23/2022] [Indexed: 12/28/2022] Open
Abstract
Early limb bud development has been of considerable interest for the study of embryological development and especially morphogenesis. The focus has long been on biochemical signalling and less on cell biomechanics and mechanobiology. However, their importance cannot be understated since tissue shape changes are ultimately controlled by active forces and bulk tissue rheological properties that in turn depend on cell-cell interactions as well as extracellular matrix composition. Moreover, the feedback between gene regulation and the biomechanical environment is still poorly understood. In recent years, novel experimental techniques and computational models have reinvigorated research on this biomechanical and mechanobiological side of embryological development. In this review, we consider three stages of early limb development, namely: outgrowth, elongation, and condensation. For each of these stages, we summarize basic biological regulation and examine the role of cellular and tissue mechanics in the morphogenetic process.
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Xie T, St Pierre SR, Olaranont N, Brown LE, Wu M, Sun Y. Condensation tendency and planar isotropic actin gradient induce radial alignment in confined monolayers. eLife 2021; 10:e60381. [PMID: 34542405 PMCID: PMC8478414 DOI: 10.7554/elife.60381] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 09/09/2021] [Indexed: 02/01/2023] Open
Abstract
A monolayer of highly motile cells can establish long-range orientational order, which can be explained by hydrodynamic theory of active gels and fluids. However, it is less clear how cell shape changes and rearrangement are governed when the monolayer is in mechanical equilibrium states when cell motility diminishes. In this work, we report that rat embryonic fibroblasts (REF), when confined in circular mesoscale patterns on rigid substrates, can transition from the spindle shapes to more compact morphologies. Cells align radially only at the pattern boundary when they are in the mechanical equilibrium. This radial alignment disappears when cell contractility or cell-cell adhesion is reduced. Unlike monolayers of spindle-like cells such as NIH-3T3 fibroblasts with minimal intercellular interactions or epithelial cells like Madin-Darby canine kidney (MDCK) with strong cortical actin network, confined REF monolayers present an actin gradient with isotropic meshwork, suggesting the existence of a stiffness gradient. In addition, the REF cells tend to condense on soft substrates, a collective cell behavior we refer to as the 'condensation tendency'. This condensation tendency, together with geometrical confinement, induces tensile prestretch (i.e. an isotropic stretch that causes tissue to contract when released) to the confined monolayer. By developing a Voronoi-cell model, we demonstrate that the combined global tissue prestretch and cell stiffness differential between the inner and boundary cells can sufficiently define the cell radial alignment at the pattern boundary.
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Affiliation(s)
- Tianfa Xie
- Department of Mechanical and Industrial Engineering, University of MassachusettsAmherstUnited States
| | - Sarah R St Pierre
- Department of Mechanical and Industrial Engineering, University of MassachusettsAmherstUnited States
| | - Nonthakorn Olaranont
- Department of Mathematical Sciences, Worcester Polytechnic InstituteWorcesterUnited States
| | - Lauren E Brown
- Department of Biomedical Engineering, University of MassachusettsAmherstUnited States
| | - Min Wu
- Department of Mathematical Sciences, Worcester Polytechnic InstituteWorcesterUnited States
| | - Yubing Sun
- Department of Mechanical and Industrial Engineering, University of MassachusettsAmherstUnited States
- Department of Biomedical Engineering, University of MassachusettsAmherstUnited States
- Department of Chemical Engineering, University of MassachusettsAmherstUnited States
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20
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Effects of Extracellular Osteoanabolic Agents on the Endogenous Response of Osteoblastic Cells. Cells 2021; 10:cells10092383. [PMID: 34572032 PMCID: PMC8471159 DOI: 10.3390/cells10092383] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 08/31/2021] [Accepted: 09/07/2021] [Indexed: 12/27/2022] Open
Abstract
The complex multidimensional skeletal organization can adapt its structure in accordance with external contexts, demonstrating excellent self-renewal capacity. Thus, optimal extracellular environmental properties are critical for bone regeneration and inextricably linked to the mechanical and biological states of bone. It is interesting to note that the microstructure of bone depends not only on genetic determinants (which control the bone remodeling loop through autocrine and paracrine signals) but also, more importantly, on the continuous response of cells to external mechanical cues. In particular, bone cells sense mechanical signals such as shear, tensile, loading and vibration, and once activated, they react by regulating bone anabolism. Although several specific surrounding conditions needed for osteoblast cells to specifically augment bone formation have been empirically discovered, most of the underlying biomechanical cellular processes underneath remain largely unknown. Nevertheless, exogenous stimuli of endogenous osteogenesis can be applied to promote the mineral apposition rate, bone formation, bone mass and bone strength, as well as expediting fracture repair and bone regeneration. The following review summarizes the latest studies related to the proliferation and differentiation of osteoblastic cells, enhanced by mechanical forces or supplemental signaling factors (such as trace metals, nutraceuticals, vitamins and exosomes), providing a thorough overview of the exogenous osteogenic agents which can be exploited to modulate and influence the mechanically induced anabolism of bone. Furthermore, this review aims to discuss the emerging role of extracellular stimuli in skeletal metabolism as well as their potential roles and provide new perspectives for the treatment of bone disorders.
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21
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Kong M, Zhang Y, Song M, Cong W, Gao C, Zhang J, Han S, Tu Q, Ma X. Myocardin‑related transcription factor A nuclear translocation contributes to mechanical overload‑induced nucleus pulposus fibrosis in rats with intervertebral disc degeneration. Int J Mol Med 2021; 48:123. [PMID: 33982787 PMCID: PMC8121555 DOI: 10.3892/ijmm.2021.4956] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Accepted: 04/16/2021] [Indexed: 01/22/2023] Open
Abstract
Previous studies have reported that the Ras homolog family member A (RhoA)/myocardin‑related transcription factor A (MRTF‑A) nuclear translocation axis positively regulates fibrogenesis induced by mechanical forces in various organ systems. The aim of the present study was to determine whether this signaling pathway was involved in the pathogenesis of nucleus pulposus (NP) fibrosis induced by mechanical overload during the progression of intervertebral disc degeneration (IVDD) and to confirm the alleviating effect of an MRTF‑A inhibitor in the treatment of IVDD. NP cells (NPCs) were cultured on substrates of different stiffness (2.9 and 41.7 KPa), which mimicked normal and overloaded microenvironments, and were treated with an inhibitor of MRTF‑A nuclear import, CCG‑1423. In addition, bipedal rats were established by clipping the forelimbs of rats at 1 month and gradually elevating the feeding trough, and in order to establish a long‑term overload‑induced model of IVDD, and their intervertebral discs were injected with CCG‑1423 in situ. Cell viability was determined by Cell Counting Kit‑8 assay, and protein expression was determined by western blotting, immunofluorescence and immunohistochemical staining. The results demonstrated that the viability of NPCs was not affected by the application of force or the inhibitor. In NPCs cultured on stiff matrices, MRTF‑A was mostly localized in the nucleus, and the expression levels of fibrotic proteins, including type I collagen, connective tissue growth factor and α‑smooth muscle cell actin, were upregulated compared with those in NPCs cultured on soft matrices. The levels of these proteins were reduced by CCG‑1423 treatment. In rats, 6 months of upright posture activated MRTF‑A nuclear‑cytoplasmic trafficking and fibrogenesis in the NP and induced IVDD; these effects were alleviated by CCG‑1423 treatment. In conclusion, the results of the present study demonstrated that the RhoA/MRTF‑A translocation pathway may promote mechanical overload‑induced fibrogenic activity in NP tissue and partially elucidated the molecular mechanisms underlying the occurrence of IVDD.
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Affiliation(s)
- Meng Kong
- Department of Spinal Surgery, The Affiliated Hospital of Qingdao University, Qing'dao, Shandong 266000, P.R. China
| | - Yiran Zhang
- Department of Spinal Surgery, The Affiliated Hospital of Qingdao University, Qing'dao, Shandong 266000, P.R. China
| | - Mengxiong Song
- Department of Spinal Surgery, The Affiliated Hospital of Qingdao University, Qing'dao, Shandong 266000, P.R. China
| | - Wenbin Cong
- Department of Radiology, The Affiliated Hospital of Qingdao University, Qing'dao, Shandong 266000, P.R. China
| | - Changtong Gao
- Minimally Invasive Interventional Therapy Center, Qingdao Municipal Hospital, Qing'dao, Shandong 266000, P.R. China
| | - Jiajun Zhang
- Department of Spinal Surgery, The Affiliated Hospital of Qingdao University, Qing'dao, Shandong 266000, P.R. China
| | - Shuo Han
- Department of Spinal Surgery, The Affiliated Hospital of Qingdao University, Qing'dao, Shandong 266000, P.R. China
| | - Qihao Tu
- Department of Spinal Surgery, The Affiliated Hospital of Qingdao University, Qing'dao, Shandong 266000, P.R. China
| | - Xuexiao Ma
- Department of Spinal Surgery, The Affiliated Hospital of Qingdao University, Qing'dao, Shandong 266000, P.R. China
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22
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Hernández-Cáceres MP, Munoz L, Pradenas JM, Pena F, Lagos P, Aceiton P, Owen GI, Morselli E, Criollo A, Ravasio A, Bertocchi C. Mechanobiology of Autophagy: The Unexplored Side of Cancer. Front Oncol 2021; 11:632956. [PMID: 33718218 PMCID: PMC7952994 DOI: 10.3389/fonc.2021.632956] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 02/01/2021] [Indexed: 12/12/2022] Open
Abstract
Proper execution of cellular function, maintenance of cellular homeostasis and cell survival depend on functional integration of cellular processes and correct orchestration of cellular responses to stresses. Cancer transformation is a common negative consequence of mismanagement of coordinated response by the cell. In this scenario, by maintaining the balance among synthesis, degradation, and recycling of cytosolic components including proteins, lipids, and organelles the process of autophagy plays a central role. Several environmental stresses activate autophagy, among those hypoxia, DNA damage, inflammation, and metabolic challenges such as starvation. In addition to these chemical challenges, there is a requirement for cells to cope with mechanical stresses stemming from their microenvironment. Cells accomplish this task by activating an intrinsic mechanical response mediated by cytoskeleton active processes and through mechanosensitive protein complexes which interface the cells with their mechano-environment. Despite autophagy and cell mechanics being known to play crucial transforming roles during oncogenesis and malignant progression their interplay is largely overlooked. In this review, we highlight the role of physical forces in autophagy regulation and their potential implications in both physiological as well as pathological conditions. By taking a mechanical perspective, we wish to stimulate novel questions to further the investigation of the mechanical requirements of autophagy and appreciate the extent to which mechanical signals affect this process.
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Affiliation(s)
- Maria Paz Hernández-Cáceres
- Laboratory of Autophagy and Metabolism, Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica De Chile, Santiago, Chile
| | - Leslie Munoz
- Laboratory for Mechanobiology of Transforming Systems, Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
- Laboratory for Molecular Mechanics of Cell Adhesion, Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica De Chile, Santiago, Chile
| | - Javiera M. Pradenas
- Advanced Center for Chronic Diseases (ACCDiS), Santiago, Chile
- Laboratory of Investigation in Oncology, Faculty of Biological Sciences Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Francisco Pena
- Laboratory for Mechanobiology of Transforming Systems, Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
- Laboratory for Molecular Mechanics of Cell Adhesion, Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica De Chile, Santiago, Chile
| | - Pablo Lagos
- Laboratory of Autophagy and Metabolism, Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica De Chile, Santiago, Chile
| | - Pablo Aceiton
- Laboratory for Mechanobiology of Transforming Systems, Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
- Laboratory for Molecular Mechanics of Cell Adhesion, Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica De Chile, Santiago, Chile
| | - Gareth I. Owen
- Advanced Center for Chronic Diseases (ACCDiS), Santiago, Chile
- Laboratory of Investigation in Oncology, Faculty of Biological Sciences Pontificia Universidad Católica de Chile, Santiago, Chile
- Millennium Institute on Immunology and Immunotherapy, Santiago, Chile
| | - Eugenia Morselli
- Laboratory of Autophagy and Metabolism, Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica De Chile, Santiago, Chile
- Autophagy Research Center, Santiago de Chile, Chile
| | - Alfredo Criollo
- Advanced Center for Chronic Diseases (ACCDiS), Santiago, Chile
- Autophagy Research Center, Santiago de Chile, Chile
- Facultad De Odontología, Instituto De Investigación En Ciencias Odontológicas (ICOD), Universidad De Chile, Santiago, Chile
| | - Andrea Ravasio
- Laboratory for Mechanobiology of Transforming Systems, Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Cristina Bertocchi
- Laboratory for Molecular Mechanics of Cell Adhesion, Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica De Chile, Santiago, Chile
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23
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Aprile P, Kelly DJ. Hydrostatic Pressure Regulates the Volume, Aggregation and Chondrogenic Differentiation of Bone Marrow Derived Stromal Cells. Front Bioeng Biotechnol 2021; 8:619914. [PMID: 33520969 PMCID: PMC7844310 DOI: 10.3389/fbioe.2020.619914] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 12/15/2020] [Indexed: 01/17/2023] Open
Abstract
The limited ability of articular cartilage to self-repair has motivated the development of tissue engineering strategies that aim to harness the regenerative potential of mesenchymal stem/marrow stromal cells (MSCs). Understanding how environmental factors regulate the phenotype of MSCs will be central to unlocking their regenerative potential. The biophysical environment is known to regulate the phenotype of stem cells, with factors such as substrate stiffness and externally applied mechanical loads known to regulate chondrogenesis of MSCs. In particular, hydrostatic pressure (HP) has been shown to play a key role in the development and maintenance of articular cartilage. Using a collagen-alginate interpenetrating network (IPN) hydrogel as a model system to tune matrix stiffness, this study sought to investigate how HP and substrate stiffness interact to regulate chondrogenesis of MSCs. If applied during early chondrogenesis in soft IPN hydrogels, HP was found to downregulate the expression of ACAN, COL2, CDH2 and COLX, but to increase the expression of the osteogenic factors RUNX2 and COL1. This correlated with a reduction in SMAD 2/3, HDAC4 nuclear localization and the expression of NCAD. It was also associated with a reduction in cell volume, an increase in the average distance between MSCs in the hydrogels and a decrease in their tendency to form aggregates. In contrast, the delayed application of HP to MSCs grown in soft hydrogels was associated with increased cellular volume and aggregation and the maintenance of a chondrogenic phenotype. Together these findings demonstrate how tailoring the stiffness and the timing of HP exposure can be leveraged to regulate chondrogenesis of MSCs and opens alternative avenues for developmentally inspired strategies for cartilage tissue regeneration.
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Affiliation(s)
- Paola Aprile
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.,Department of Mechanical, Manufacturing and Biomedical Engineering, Trinity College Dublin, Dublin, Ireland
| | - Daniel J Kelly
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.,Department of Mechanical, Manufacturing and Biomedical Engineering, Trinity College Dublin, Dublin, Ireland.,Advanced Materials and Bioengineering Research Centre, Royal College of Surgeons in Ireland and Trinity College Dublin, Dublin, Ireland
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24
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Zhao J, Manuchehrfar F, Liang J. Cell-substrate mechanics guide collective cell migration through intercellular adhesion: a dynamic finite element cellular model. Biomech Model Mechanobiol 2020; 19:1781-1796. [PMID: 32108272 PMCID: PMC7990038 DOI: 10.1007/s10237-020-01308-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 02/13/2020] [Indexed: 01/23/2023]
Abstract
During the process of tissue formation and regeneration, cells migrate collectively while remaining connected through intercellular adhesions. However, the roles of cell-substrate and cell-cell mechanical interactions in regulating collective cell migration are still unclear. In this study, we employ a newly developed finite element cellular model to study collective cell migration by exploring the effects of mechanical feedback between cell and substrate and mechanical signal transmission between adjacent cells. Our viscoelastic model of cells consists many triangular elements and is of high resolution. Cadherin adhesion between cells is modeled explicitly as linear springs at subcellular level. In addition, we incorporate a mechano-chemical feedback loop between cell-substrate mechanics and Rac-mediated cell protrusion. Our model can reproduce a number of experimentally observed patterns of collective cell migration during wound healing, including cell migration persistence, separation distance between cell pairs and migration direction. Moreover, we demonstrate that cell protrusion determined by the cell-substrate mechanics plays an important role in guiding persistent and oriented collective cell migration. Furthermore, this guidance cue can be maintained and transmitted to submarginal cells of long distance through intercellular adhesions. Our study illustrates that our finite element cellular model can be employed to study broad problems of complex tissue in dynamic changes at subcellular level.
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Affiliation(s)
- Jieling Zhao
- INRIA de Paris and Sorbonne Universités UPMC, LJLL Team Mamba, Paris, France.
| | - Farid Manuchehrfar
- Department of Bioengineering, University of Illinois at Chicago, Chicago, USA
| | - Jie Liang
- Department of Bioengineering, University of Illinois at Chicago, Chicago, USA
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25
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Young J, Hua X, Somsel H, Reichart F, Kessler H, Spatz JP. Integrin Subtypes and Nanoscale Ligand Presentation Influence Drug Sensitivity in Cancer Cells. NANO LETTERS 2020; 20:1183-1191. [PMID: 31908168 PMCID: PMC7020138 DOI: 10.1021/acs.nanolett.9b04607] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Cancer cell-matrix interactions have been shown to enhance cancer cell survival via the activation of pro-survival signaling pathways. These pathways are initiated at the site of interaction, i.e., integrins, and thus, their inhibition has been the target of therapeutic strategies. Individual roles for fibronectin-binding integrin subtypes αvβ3 and α5β1 have been shown for various cellular processes; however, a systematic comparison of their function in adhesion-dependent chemoresistance is lacking. Here, we utilize integrin subtype-specific peptidomimetics for αvβ3 and α5β1, both as blocking agents on fibronectin-coated surfaces and as surface-immobilized adhesion sites, in order to parse out their role in breast cancer cell survival. Block copolymer micelle nanolithography is utilized to immobilize peptidomimetics onto highly ordered gold nanoparticle arrays with biologically relevant interparticle spacings (35, 50, or 70 nm), thereby providing a platform for ascertaining the dependence of ligand spacing in chemoprotection. We show that several cellular properties-morphology, focal adhesion formation, and migration-are intricately linked to both the integrin subtype and their nanospacing. Importantly, we show that chemotherapeutic drug sensitivity is highly dependent on both parameters, with smaller ligand spacing generally hindering survival. Furthermore, we identify ligand type-specific patterns of drug sensitivity, with enhanced chemosurvival when cells engage αvβ3 vs α5β1 on fibronectin; however, this is heavily reliant on nanoscale spacing, as the opposite is observed when ligands are spaced at 70 nm. These data imply that even nanoscale alterations in extracellular matrix properties have profound effects on cancer cell survival and can thus inform future therapies and drug testing platforms.
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Affiliation(s)
- Jennifer
L. Young
- Department
of Cellular Biophysics, Max Planck Institute
for Medical Research, 69120 Heidelberg, Germany
- Department
of Biophysical Chemistry, Heidelberg University, 69120 Heidelberg, Germany
| | - Ximeng Hua
- Department
of Cellular Biophysics, Max Planck Institute
for Medical Research, 69120 Heidelberg, Germany
- Department
of Biophysical Chemistry, Heidelberg University, 69120 Heidelberg, Germany
| | - Heidi Somsel
- Department
of Cellular Biophysics, Max Planck Institute
for Medical Research, 69120 Heidelberg, Germany
- Department
of Biophysical Chemistry, Heidelberg University, 69120 Heidelberg, Germany
| | - Florian Reichart
- Department
of Chemistry, Technical University of Munich, 85748 Garching, Germany
| | - Horst Kessler
- Department
of Chemistry, Technical University of Munich, 85748 Garching, Germany
| | - Joachim P. Spatz
- Department
of Cellular Biophysics, Max Planck Institute
for Medical Research, 69120 Heidelberg, Germany
- Department
of Biophysical Chemistry, Heidelberg University, 69120 Heidelberg, Germany
- E-mail: . Phone: +49 6221 486-420
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26
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Multi-well plate cell contraction assay detects negatively correlated cellular responses to pharmacological inhibitors in contractility and migration. Biochem Biophys Res Commun 2020; 521:527-532. [DOI: 10.1016/j.bbrc.2019.10.160] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 10/22/2019] [Indexed: 12/28/2022]
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27
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Setayeshmehr M, Esfandiari E, Rafieinia M, Hashemibeni B, Taheri-Kafrani A, Samadikuchaksaraei A, Kaplan DL, Moroni L, Joghataei MT. Hybrid and Composite Scaffolds Based on Extracellular Matrices for Cartilage Tissue Engineering. TISSUE ENGINEERING PART B-REVIEWS 2019; 25:202-224. [PMID: 30648478 DOI: 10.1089/ten.teb.2018.0245] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
IMPACT STATEMENT Scaffolds fabricated from extracellular matrix (ECM) derivatives are composed of conducive structures for cell attachment, proliferation, and differentiation, but generally do not have proper mechanical properties and load-bearing capacity. In contrast, scaffolds based on synthetic biomaterials demonstrate appropriate mechanical strength, but the absence of desirable biological properties is one of their main disadvantages. To integrate mechanical strength and biological cues, these ECM derivatives can be conjugated with synthetic biomaterials. Hence, hybrid scaffolds comprising both advantages of synthetic polymers and ECM derivatives can be considered a robust vehicle for tissue engineering applications.
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Affiliation(s)
- Mohsen Setayeshmehr
- 1 Department of Tissue Engineering and Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences (IUMS), Tehran, Iran.,2 Biomaterials Nanotechnology and Tissue Engineering Group, Department of Advanced Medical Technology, Isfahan University of Medical Sciences, Isfahan, Iran.,3 MERLN Institute for Technology Inspired Regenerative Medicine, Complex Tissue Regeneration, Maastricht University, Maastricht, The Netherlands
| | - Ebrahim Esfandiari
- 4 Department of Anatomical Sciences and Molecular Biology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohammad Rafieinia
- 2 Biomaterials Nanotechnology and Tissue Engineering Group, Department of Advanced Medical Technology, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Batool Hashemibeni
- 4 Department of Anatomical Sciences and Molecular Biology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Asghar Taheri-Kafrani
- 5 Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan, Isfahan, Iran
| | - Ali Samadikuchaksaraei
- 1 Department of Tissue Engineering and Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences (IUMS), Tehran, Iran.,6 Cellular and Molecular Research Center, Iran University of Medical Sciences (IUMS), Tehran, Iran
| | - David L Kaplan
- 7 Department of Biomedical Engineering, Tufts University, Medford, Massachusetts
| | - Lorenzo Moroni
- 3 MERLN Institute for Technology Inspired Regenerative Medicine, Complex Tissue Regeneration, Maastricht University, Maastricht, The Netherlands.,8 CNR Nanotec-Institute of Nanotechnology, c/o Campus Ecotekne, Università del Salento, Lecce, Italy
| | - Mohammad T Joghataei
- 1 Department of Tissue Engineering and Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences (IUMS), Tehran, Iran.,6 Cellular and Molecular Research Center, Iran University of Medical Sciences (IUMS), Tehran, Iran
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28
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Bavi N, Richardson J, Heu C, Martinac B, Poole K. PIEZO1-Mediated Currents Are Modulated by Substrate Mechanics. ACS NANO 2019; 13:13545-13559. [PMID: 31689081 DOI: 10.1021/acsnano.9b07499] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
PIEZO1 is a bona fide mammalian mechanically activated channel that has recently been shown to provide instructive cues during neuronal specification, texture sensing, and cell migration where mechanical inputs arise at the interface between the cells and their substrate. Here, we have investigated whether the mechanical properties of the substrate alone can modulate PIEZO1 activity, in response to exogenously applied stimuli, using elastomeric pillar arrays as force transducers. This methodology enables application of mechanical stimuli at cell-substrate contact points by deflecting individual pili. We found that PIEZO1 is more sensitive to substrate deflections with increased spacing between pili (reducing surface roughness) but not on more stiff substrates. Cellular contractility was required for the sensitization of PIEZO1 but was not essential for PIEZO1 activation. Computational modeling suggested that the membrane tension changes generated by pillar deflections were below the membrane tension changes that arise from cellular indentation or high-speed pressure clamp assays. We conclude that the mechanics of the microenvironment can modulate PIEZO1 signaling, highlighting the importance of studying channel activation directly at the cell-substrate interface. We propose that forces arising from actin-mediated contractility and within the lipid bilayer act synergistically to regulate PIEZO1 activation by stimuli applied at contacts between cells and their surroundings.
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Affiliation(s)
- Navid Bavi
- EMBL Australia Node in Single Molecule Science, School of Medical Sciences , University of New South Wales , Sydney , NSW 2052 , Australia
- Institute for Biophysical Dynamics , The University of Chicago , Chicago , Illinois 60637 , United States
- Cellular and Systems Physiology, School of Medical Sciences , University of New South Wales , Sydney , NSW 2052 , Australia
| | - Jessica Richardson
- EMBL Australia Node in Single Molecule Science, School of Medical Sciences , University of New South Wales , Sydney , NSW 2052 , Australia
- Cellular and Systems Physiology, School of Medical Sciences , University of New South Wales , Sydney , NSW 2052 , Australia
| | - Celine Heu
- Biomedical Imaging Facility , University of New South Wales , Sydney , NSW 2052 , Australia
| | - Boris Martinac
- Molecular Cardiology and Biophysics Division , Victor Chang Cardiac Research Institute , Darlinghurst , NSW 2010 , Australia
- St Vincent's Clinical School, Faculty of Medicine , University of New South Wales , Darlinghurst , NSW 2010 , Australia
| | - Kate Poole
- EMBL Australia Node in Single Molecule Science, School of Medical Sciences , University of New South Wales , Sydney , NSW 2052 , Australia
- Cellular and Systems Physiology, School of Medical Sciences , University of New South Wales , Sydney , NSW 2052 , Australia
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29
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Paddillaya N, Mishra A, Kondaiah P, Pullarkat P, Menon GI, Gundiah N. Biophysics of Cell-Substrate Interactions Under Shear. Front Cell Dev Biol 2019; 7:251. [PMID: 31781558 PMCID: PMC6857480 DOI: 10.3389/fcell.2019.00251] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 10/10/2019] [Indexed: 12/31/2022] Open
Abstract
Cells adhere to substrates through mechanosensitive focal adhesion complexes. Measurements that probe how cells detach from substrates when they experience an applied force connect molecular-scale aspects of cell adhesion with the biophysical properties of adherent cells. Such forces can be applied through shear devices that flow fluid in a controlled manner across cells. The signaling pathways associated with focal adhesions, in particular those that involve integrins and receptor tyrosine kinases, are complex, receiving mechano-chemical feedback from the sensing of substrate stiffness as well as of external forces. This article reviews the signaling processes involved in mechanosensing and mechanotransduction during cell-substrate interactions, describing the role such signaling plays in cancer metastasis. We examine some recent progress in quantifying the strength of these interactions, describing a novel fluid shear device that allows for the visualization of the cell and its sub-cellular structures under a shear flow. We also summarize related results from a biophysical model for cellular de-adhesion induced by applied forces. Quantifying cell-substrate adhesions under shear should aid in the development of mechano-diagnostic techniques for diseases in which cell-adhesion is mis-regulated, such as cancers.
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Affiliation(s)
- Neha Paddillaya
- Centre for Biosystems Science and Engineering, Indian Institute of Science, Bangalore, India
| | - Ashish Mishra
- Soft Condensed Matter Group, Raman Research Institute, Bangalore, India
| | - Paturu Kondaiah
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore, India
| | - Pramod Pullarkat
- Soft Condensed Matter Group, Raman Research Institute, Bangalore, India
| | - Gautam I Menon
- The Institute of Mathematical Sciences, Chennai, India.,Homi Bhabha National Institute, Mumbai, India.,Department of Physics, Ashoka University, Sonepat, India
| | - Namrata Gundiah
- Centre for Biosystems Science and Engineering, Indian Institute of Science, Bangalore, India.,Department of Mechanical Engineering, Indian Institute of Science, Bangalore, India
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30
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Hong H, Park SM, Kim D, Park SJ, Kim DS. Grayscale mask‐assisted photochemical crosslinking for a dense collagen construct with stiffness gradient. J Biomed Mater Res B Appl Biomater 2019; 108:1000-1009. [DOI: 10.1002/jbm.b.34452] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 06/12/2019] [Accepted: 07/17/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Hyeonjun Hong
- Department of Mechanical EngineeringPohang University of Science and Technology (POSTECH) 77 Cheongam‐ro, Pohang Gyeongbuk 37673 South Korea
| | - Sang Min Park
- Department of Mechanical EngineeringPohang University of Science and Technology (POSTECH) 77 Cheongam‐ro, Pohang Gyeongbuk 37673 South Korea
| | - Dohui Kim
- Department of Mechanical EngineeringPohang University of Science and Technology (POSTECH) 77 Cheongam‐ro, Pohang Gyeongbuk 37673 South Korea
| | - Sung Jea Park
- Advanced Technology Research Center & School of Mechanical EngineeringKorea University of Technology and Education (KOREATECH) Cheonan Chungnam 31253 South Korea
| | - Dong Sung Kim
- Department of Mechanical EngineeringPohang University of Science and Technology (POSTECH) 77 Cheongam‐ro, Pohang Gyeongbuk 37673 South Korea
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31
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Baek S, Liu C, Gou K, Kim J, Gharahi H, Chan C. Utilization of the Theory of Small on Large Deformation for Studying Mechanosensitive Cellular Behaviors. JOURNAL OF ELASTICITY 2019; 136:137-157. [PMID: 31598031 PMCID: PMC6785204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Recent studies suggest that cells routinely probe their mechanical environments and that this mechanosensitive behavior regulates some of their cellular activities. The finite elasticity theory of small-on-large deformation (SoL) has been shown to be effective in interpreting the mechanosensitive behavior of cells on a substrate that has been subjected to a prior large static stretch before the culturing of the cells. Small on large deformation is the superposition of a small deformation onto a prior large deformation that serves as the new reference configuration. This article aims to refine SoL theory to develop a theoretical framework for improved physical interpretation of mechanosensing. Given the initial large deformation in SoL, the stress generated by the small deformation is linearized, and the linearized elasticity tensor is taken to be a significant factor facilitating prediction of cellular behavior. The pre-stretch is shown to produce direction-based, effective elastic moduli for cellular mechanosensing. The utility of this SoL theory is illustrated by culturing of two different cell types grown on uniaxially pre-stretched surfaces that induce changes to the cell orientation and behavior.
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Affiliation(s)
- Seungik Baek
- Department of Mechanical Engineering, 428 S. Shaw Lane, Michigan State University, East Lansing, MI 48824, US, Tel.: +1-517-432-3161
| | - Chun Liu
- Department of Chemical Engineering, Michigan State University, East Lansing, MI 48824, US
| | - Kun Gou
- Department of Science and Mathematics, Texas A&M University-San Antonio, San Antonio, TX 78224, US
| | - Jungsil Kim
- Department of Mechanical Engineering and Materials Science, Washington University-St. Louis, MO 63130, US
| | - Hamidreza Gharahi
- Department of Mechanical Engineering, 428 S. Shaw Lane, Michigan State University, East Lansing, MI 48824, US
| | - Christina Chan
- Department of Chemical Engineering, Michigan State University, East Lansing, MI 48824, US
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32
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Genkel VV, Kuznetcova AS, Shaposhnik II. Biomechanical Forces and Atherosclerosis: From Mechanism to Diagnosis and Treatment. Curr Cardiol Rev 2019; 16:187-197. [PMID: 31362692 PMCID: PMC7536809 DOI: 10.2174/1573403x15666190730095153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 07/16/2019] [Accepted: 07/17/2019] [Indexed: 11/22/2022] Open
Abstract
The article provides an overview of current views on the role of biomechanical forces in the pathogenesis of atherosclerosis. The importance of biomechanical forces in maintaining vascular homeostasis is considered. We provide descriptions of mechanosensing and mechanotransduction. The roles of wall shear stress and circumferential wall stress in the initiation, progression and destabilization of atherosclerotic plaque are described. The data on the possibilities of assessing biomechanical factors in clinical practice and the clinical significance of this approach are presented. The article concludes with a discussion on current therapeutic approaches based on the modulation of biomechanical forces.
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Affiliation(s)
- Vadim V Genkel
- Department of Internal Medicine, Federal State Budgetary Educational Institution of Higher Education "South-Ural State Medical University" of the Ministry of Healthcare of the Russian Federation, Chelyabinsk, Russian Federation
| | - Alla S Kuznetcova
- Department of Hospital Therapy Federal State Budgetary Educational Institution of Higher Education "South-Ural State Medical University" of the Ministry of Healthcare of the Russian Federation, Chelyabinsk, Russian Federation
| | - Igor I Shaposhnik
- Department of Internal Medicine, Federal State Budgetary Educational Institution of Higher Education "South-Ural State Medical University" of the Ministry of Healthcare of the Russian Federation, Chelyabinsk, Russian Federation
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33
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Moghaddam MM, Bonakdar S, Shariatpanahi MR, Shokrgozar MA, Faghihi S. The Effect of Physical Cues on the Stem Cell Differentiation. Curr Stem Cell Res Ther 2019; 14:268-277. [DOI: 10.2174/1574888x14666181227120706] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 11/05/2018] [Accepted: 12/13/2018] [Indexed: 12/21/2022]
Abstract
Development of multicellular organisms is a very complex and organized process during which cells respond to various factors and features in extracellular environments. It has been demonstrated that during embryonic evolvement, under certain physiological or experimental conditions, unspecialized cells or stem cells can be induced to become tissue or organ-specific cells with special functions. Considering the importance of physical cues in stem cell fate, the present study reviews the role of physical factors in stem cells differentiation and discusses the molecular mechanisms associated with these factors.
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Affiliation(s)
- Mehrdad M. Moghaddam
- Stem Cell and Regenerative Medicine Group, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, 14965/161, Iran
| | - Shahin Bonakdar
- National Cell Bank, Pasteur Institute of Iran, Tehran 3159915111, Iran
| | | | | | - Shahab Faghihi
- Stem Cell and Regenerative Medicine Group, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, 14965/161, Iran
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34
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Hickey RJ, Pelling AE. Cellulose Biomaterials for Tissue Engineering. Front Bioeng Biotechnol 2019; 7:45. [PMID: 30968018 PMCID: PMC6438900 DOI: 10.3389/fbioe.2019.00045] [Citation(s) in RCA: 192] [Impact Index Per Article: 38.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Accepted: 02/25/2019] [Indexed: 12/26/2022] Open
Abstract
In this review, we highlight the importance of nanostructure of cellulose-based biomaterials to allow cellular adhesion, the contribution of nanostructure to macroscale mechanical properties, and several key applications of these materials for fundamental scientific research and biomedical engineering. Different features on the nanoscale can have macroscale impacts on tissue function. Cellulose is a diverse material with tunable properties and is a promising platform for biomaterial development and tissue engineering. Cellulose-based biomaterials offer some important advantages over conventional synthetic materials. Here we provide an up-to-date summary of the status of the field of cellulose-based biomaterials in the context of bottom-up approaches for tissue engineering. We anticipate that cellulose-based material research will continue to expand because of the diversity and versatility of biochemical and biophysical characteristics highlighted in this review.
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Affiliation(s)
- Ryan J. Hickey
- Department of Physics, STEM Complex, University of Ottawa, Ottawa, ON, Canada
| | - Andrew E. Pelling
- Department of Physics, STEM Complex, University of Ottawa, Ottawa, ON, Canada
- Department of Biology, University of Ottawa, Ottawa, ON, Canada
- Institute for Science Society and Policy, University of Ottawa, Ottawa, ON, Canada
- SymbioticA, School of Human Sciences, University of Western Australia, Perth, WA, Australia
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35
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Xie H, Cao T, Franco-Obregón A, Rosa V. Graphene-Induced Osteogenic Differentiation Is Mediated by the Integrin/FAK Axis. Int J Mol Sci 2019; 20:ijms20030574. [PMID: 30699966 PMCID: PMC6387117 DOI: 10.3390/ijms20030574] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 01/22/2019] [Accepted: 01/23/2019] [Indexed: 12/22/2022] Open
Abstract
Graphene is capable of promoting osteogenesis without chemical induction. Nevertheless, the underlying mechanism(s) remain largely unknown. The objectives here were: (i) to assess whether graphene scaffolds are capable of supporting osteogenesis in vivo and; (ii) to ascertain the participation of the integrin/FAK mechanotransduction axis during the osteogenic differentiation induced by graphene. MSC-impregnated graphene scaffolds (n = 6) were implanted into immunocompromised mice (28 days). Alternatively, MSCs were seeded onto PDMS substrates (modulus of elasticity = 130, 830 and 1300 kPa) coated with a single monomolecular layer of graphene and cultured in basal medium (10 days). The ensuing expressions of FAK-p397, integrin, ROCK1, F-actin, Smad p1/5, RUNX2, OCN and OPN were evaluated by Western blot (n = 3). As controls, MSCs were plated onto uncoated PDMS in the presence of mechanotransduction inhibitors (echistatin, Y27632 and DMH1). MSC-impregnated graphene scaffolds exhibited positive immunoexpression of bone-related markers (RUNX2 and OPN) without the assistance of osteogenic inducers. In vitro, regardless of the stiffness of the underlying PDMS substrate, MSCs seeded onto graphene-coated PDMS substrates demonstrated higher expressions of all tested osteogenic and integrin/FAK proteins tested compared to MSCs seeded onto PDMS alone. Hence, graphene promotes osteogenesis via the activation of the mechanosensitive integrin/FAK axis.
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Affiliation(s)
- Han Xie
- Faculty of Dentistry, National University of Singapore, 9 Lower Kent Ridge Road, Singapore 119085, Singapore.
| | - Tong Cao
- Faculty of Dentistry, National University of Singapore, 9 Lower Kent Ridge Road, Singapore 119085, Singapore.
| | - Alfredo Franco-Obregón
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, NUHS Tower Block, Level 8, IE Kent Ridge Road, Singapore 119228, Singapore.
- BioIonic Currents Electromagnetic Pulsing Systems Laboratory, BICEPS, National University of Singapore, MD6, 14 medical Drive, #14-01, Singapore 117599, Singapore.
| | - Vinicius Rosa
- Faculty of Dentistry, National University of Singapore, 9 Lower Kent Ridge Road, Singapore 119085, Singapore.
- Department of Materials Science and Engineering, National University of Singapore, Blk EA, #03-09 9 Engineering Drive 1, Singapore 117575, Singapore.
- Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, Singapore 117546, Singapore.
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36
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Matte BF, Kumar A, Placone JK, Zanella VG, Martins MD, Engler AJ, Lamers ML. Matrix stiffness mechanically conditions EMT and migratory behavior of oral squamous cell carcinoma. J Cell Sci 2019; 132:jcs.224360. [PMID: 30559248 DOI: 10.1242/jcs.224360] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 12/09/2018] [Indexed: 12/29/2022] Open
Abstract
Tumors are composed of heterogeneous phenotypes, each having different sensitivities to the microenvironment. One microenvironment characteristic - matrix stiffness - helps to regulate malignant transformation and invasion in mammary tumors, but its influence on oral squamous cell carcinoma (OSCC) is unclear. We observed that, on stiff matrices, a highly invasive OSCC cell line (SCC25) comprising a low E-cad to N-cad ratio (InvH/E:NL; SCC25) had increased migration velocity and decreased adhesion strength compared to a less invasive OSCC cell line (Cal27) with high E-cad to N-cad ratio (InvL/E:NH; Cal27). However, InvL/E:NH cells acquire a mesenchymal signature and begin to migrate faster when exposed to prolonged time on a stiff niche, suggesting that cells can be mechanically conditioned. Owing to increased focal adhesion assembly, InvL/E:NH cells migrated faster, which could be reduced when increasing integrin affinity with high divalent cation concentrations. Mirroring these data in human patients, we observed that collagen organization, an indicator of matrix stiffness, was increased with advanced disease and correlated with early recurrence. Consistent with epithelial tumors, our data suggest that OSCC cells are mechanically sensitive and that their contribution to tumor progression is mediated in part by this sensitivity.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Bibiana F Matte
- Department of Oral Pathology, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.,Department of Bioengineering, University of California, San Diego; La Jolla, CA 92093, USA
| | - Aditya Kumar
- Department of Bioengineering, University of California, San Diego; La Jolla, CA 92093, USA.,Sanford Consortium for Regenerative Medicine, La Jolla, CA 92037, USA
| | - Jesse K Placone
- Department of Bioengineering, University of California, San Diego; La Jolla, CA 92093, USA.,Sanford Consortium for Regenerative Medicine, La Jolla, CA 92037, USA
| | - Virgílio G Zanella
- Department of Oral Pathology, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.,Head and Neck Surgery Department, Santa Rita Hospital, Santa Casa de Misericórdia de Porto Alegre, Porto Alegre, RS, Brazil
| | - Manoela D Martins
- Department of Oral Pathology, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Adam J Engler
- Department of Bioengineering, University of California, San Diego; La Jolla, CA 92093, USA .,Sanford Consortium for Regenerative Medicine, La Jolla, CA 92037, USA
| | - Marcelo L Lamers
- Department of Oral Pathology, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil .,Department of Morphological Sciences, Institute of Basic Health Sciences, Universidade Federal of Rio Grande do Sul, Porto Alegre, RS, Brazil
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37
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Choi A, Seo KD, Yoon H, Han SJ, Kim DS. Bulk poly(N-isopropylacrylamide) (PNIPAAm) thermoresponsive cell culture platform: toward a new horizon in cell sheet engineering. Biomater Sci 2019; 7:2277-2287. [DOI: 10.1039/c8bm01664j] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
In contrast to the conventional ‘grafting’-based thermoresponsive cell culture platform, we first developed a bulk form of thermoresponsive cell culture platform for attaching/detaching diverse types and origins of the cell sheets in different shape.
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Affiliation(s)
- Andrew Choi
- Department of Mechanical Engineering
- Pohang University of Science and Technology (POSTECH)
- Pohang 37673
- Republic of Korea
| | - Kyoung Duck Seo
- Department of Mechanical Engineering
- Pohang University of Science and Technology (POSTECH)
- Pohang 37673
- Republic of Korea
| | - Hyungjun Yoon
- Department of Mechanical Engineering
- Pohang University of Science and Technology (POSTECH)
- Pohang 37673
- Republic of Korea
| | - Seon Jin Han
- Department of Mechanical Engineering
- Pohang University of Science and Technology (POSTECH)
- Pohang 37673
- Republic of Korea
| | - Dong Sung Kim
- Department of Mechanical Engineering
- Pohang University of Science and Technology (POSTECH)
- Pohang 37673
- Republic of Korea
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38
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Abd Emami B, Mahmoudi E, Shokrgozar MA, Dehghan MM, Farzad Mohajeri S, Haghighipour N, Marjanmehr SH, Molazem M, Amin S, Gholami H. Mechanical and Chemical Predifferentiation of Mesenchymal Stem Cells Into Cardiomyocytes and Their Effectiveness on Acute Myocardial Infarction. Artif Organs 2018; 42:E114-E126. [PMID: 29508429 DOI: 10.1111/aor.13091] [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: 07/14/2017] [Revised: 10/16/2017] [Accepted: 11/09/2017] [Indexed: 12/13/2022]
Abstract
Myocardial infarction is one of the leading causes of death all over the world. Mesenchymal stem cells (MSCs) transplantation has shown a promising potential to recovery of ischemic heart disease due to their capability in differentiating into cardiac cells. However, various investigations have been performed to optimize the efficacy of cardiac cell therapy in recent years. Here, we sought to interrogate the effect of autologous transplantation of undifferentiated and predifferentiated adipose and bone marrow-derived MSCs in a rabbit model of myocardial infarction and also to investigate whether cardiac function could be improved by mechanically induced MSCs via equiaxial cyclic strain. The two sources of MSCs were induced toward cardiomyocyte phenotype using mechanical loading and chemical factors and thereafter injected into the infarcted myocardium of 35 rabbits. Echocardiography and histopathology studies were used to evaluate cardiac function after 2 months. The results demonstrated significant scar size reduction and greater recovery of left ventricle ejection fraction after transplantation of predifferentiated cells, though the differences were not significant when comparing mechanically with chemically predifferentiated MSCs. Thus, although there was no significant improvement in infarcted myocardium between chemically and mechanically predifferentiated MSCs, mechanically induced cells are more preferred due to lack of any chemical intervention and cost reasonableness in their preparation method. Outcomes of this study may be useful for developing future therapeutic strategies, however long-term assessments are still required to further examine their effectiveness.
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Affiliation(s)
| | - Elena Mahmoudi
- Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.,Rajaei Cardiovascular Medical and Research Center, Iran University of Medical Science, Tehran, Iran
| | | | - Mohammad Mehdi Dehghan
- Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.,Institute of Biomedical Research, University of Tehran, Tehran, Iran
| | - Saeed Farzad Mohajeri
- Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | | | | | - Mohammad Molazem
- Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Susan Amin
- National Cell Bank, Pasteur Institute of Iran, Tehran, Iran
| | - Hossein Gholami
- Department of Pathology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
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39
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Rose JC, De Laporte L. Hierarchical Design of Tissue Regenerative Constructs. Adv Healthc Mater 2018; 7:e1701067. [PMID: 29369541 DOI: 10.1002/adhm.201701067] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 12/01/2017] [Indexed: 02/05/2023]
Abstract
The worldwide shortage of organs fosters significant advancements in regenerative therapies. Tissue engineering and regeneration aim to supply or repair organs or tissues by combining material scaffolds, biochemical signals, and cells. The greatest challenge entails the creation of a suitable implantable or injectable 3D macroenvironment and microenvironment to allow for ex vivo or in vivo cell-induced tissue formation. This review gives an overview of the essential components of tissue regenerating scaffolds, ranging from the molecular to the macroscopic scale in a hierarchical manner. Further, this review elaborates about recent pivotal technologies, such as photopatterning, electrospinning, 3D bioprinting, or the assembly of micrometer-scale building blocks, which enable the incorporation of local heterogeneities, similar to most native extracellular matrices. These methods are applied to mimic a vast number of different tissues, including cartilage, bone, nerves, muscle, heart, and blood vessels. Despite the tremendous progress that has been made in the last decade, it remains a hurdle to build biomaterial constructs in vitro or in vivo with a native-like structure and architecture, including spatiotemporal control of biofunctional domains and mechanical properties. New chemistries and assembly methods in water will be crucial to develop therapies that are clinically translatable and can evolve into organized and functional tissues.
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Affiliation(s)
- Jonas C. Rose
- DWI—Leibniz Institute for Interactive Materials Forckenbeckstr. 50 Aachen D‐52074 Germany
| | - Laura De Laporte
- DWI—Leibniz Institute for Interactive Materials Forckenbeckstr. 50 Aachen D‐52074 Germany
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40
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Kumar A, Placone JK, Engler AJ. Understanding the extracellular forces that determine cell fate and maintenance. Development 2017; 144:4261-4270. [PMID: 29183939 DOI: 10.1242/dev.158469] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Stem cells interpret signals from their microenvironment while simultaneously modifying the niche through secreting factors and exerting mechanical forces. Many soluble stem cell cues have been determined over the past century, but in the past decade, our molecular understanding of mechanobiology has advanced to explain how passive and active forces induce similar signaling cascades that drive self-renewal, migration, differentiation or a combination of these outcomes. Improvements in stem cell culture methods, materials and biophysical tools that assess function have improved our understanding of these cascades. Here, we summarize these advances and offer perspective on ongoing challenges.
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Affiliation(s)
- Aditya Kumar
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA.,Sanford Consortium for Regenerative Medicine, La Jolla, CA 92037, USA
| | - Jesse K Placone
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA.,Sanford Consortium for Regenerative Medicine, La Jolla, CA 92037, USA
| | - Adam J Engler
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA .,Sanford Consortium for Regenerative Medicine, La Jolla, CA 92037, USA
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41
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Carroll SF, Buckley CT, Kelly DJ. Cyclic Tensile Strain Can Play a Role in Directing both Intramembranous and Endochondral Ossification of Mesenchymal Stem Cells. Front Bioeng Biotechnol 2017; 5:73. [PMID: 29230389 PMCID: PMC5712005 DOI: 10.3389/fbioe.2017.00073] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 11/02/2017] [Indexed: 01/13/2023] Open
Abstract
Successfully regenerating damaged or diseased bone and other joint tissues will require a detailed understanding of how joint specific environmental cues regulate the fate of progenitor cells that are recruited or delivered to the site of injury. The goal of this study was to explore the role of cyclic tensile strain (CTS) in regulating the initiation of mesenchymal stem cell/multipotent stromal cell (MSC) differentiation, and specifically their progression along the endochondral pathway. To this end, we first explored the influence of CTS on the differentiation of MSCs in the absence of any specific growth factor, and secondly, we examined the influence of the long-term application of this mechanical stimulus on markers of endochondral ossification in MSCs maintained in chondrogenic culture conditions. A custom bioreactor was developed to apply uniaxial tensile deformation to bone marrow-derived MSCs encapsulated within physiological relevant 3D fibrin hydrogels. Mechanical loading, applied in the absence of soluble differentiation factors, was found to enhance the expression of both tenogenic (COL1A1) and osteogenic markers (BMP2, RUNX2, and ALPL), while suppressing markers of adipogenesis. No evidence of chondrogenesis was observed, suggesting that CTS can play a role in initiating direct intramembranous ossification. During long-term culture in the presence of a chondrogenic growth factor, CTS was shown to induce MSC re-organization and alignment, increase proteoglycan and collagen production, and to enhance the expression of markers associated with endochondral ossification (BMP2, RUNX2, ALPL, OPN, and COL10A1) in a strain magnitude-dependent manner. Taken together, these findings indicate that tensile loading may play a key role in promoting both intramembranous and endochondral ossification of MSCs in a context-dependent manner. In both cases, this loading-induced promotion of osteogenesis was correlated with an increase in the expression of the osteogenic growth factor BMP2. The results of this study demonstrate the potent role that extrinsic mechanical loading plays in guiding stem cell fate, which must be carefully considered when designing cell and tissue-engineering therapies if they are to realize their clinical potential.
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Affiliation(s)
- Simon F. Carroll
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
- Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland
| | - Conor T. Buckley
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
- Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland
- Advanced Materials and Bioengineering Research Centre (AMBER), Royal College of Surgeons in Ireland and Trinity College Dublin, Dublin, Ireland
| | - Daniel J. Kelly
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
- Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland
- Department of Anatomy, Royal College of Surgeons in Ireland, Dublin, Ireland
- Advanced Materials and Bioengineering Research Centre (AMBER), Royal College of Surgeons in Ireland and Trinity College Dublin, Dublin, Ireland
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42
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Piezos thrive under pressure: mechanically activated ion channels in health and disease. Nat Rev Mol Cell Biol 2017; 18:771-783. [PMID: 28974772 DOI: 10.1038/nrm.2017.92] [Citation(s) in RCA: 281] [Impact Index Per Article: 40.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Cellular mechanotransduction, the process of translating mechanical forces into biological signals, is crucial for a wide range of physiological processes. A role for ion channels in sensing mechanical forces has been proposed for decades, but their identity in mammals remained largely elusive until the discovery of Piezos. Recent research on Piezos has underscored their importance in somatosensation (touch perception, proprioception and pulmonary respiration), red blood cell volume regulation, vascular physiology and various human genetic disorders.
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43
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Chen Y, Ju L, Rushdi M, Ge C, Zhu C. Receptor-mediated cell mechanosensing. Mol Biol Cell 2017; 28:3134-3155. [PMID: 28954860 PMCID: PMC5687017 DOI: 10.1091/mbc.e17-04-0228] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 09/06/2017] [Accepted: 09/19/2017] [Indexed: 12/22/2022] Open
Abstract
Mechanosensing depicts the ability of a cell to sense mechanical cues, which under some circumstances is mediated by the surface receptors. In this review, a four-step model is described for receptor-mediated mechanosensing. Platelet GPIb, T-cell receptor, and integrins are used as examples to illustrate the key concepts and players in this process. Mechanosensing describes the ability of a cell to sense mechanical cues of its microenvironment, including not only all components of force, stress, and strain but also substrate rigidity, topology, and adhesiveness. This ability is crucial for the cell to respond to the surrounding mechanical cues and adapt to the changing environment. Examples of responses and adaptation include (de)activation, proliferation/apoptosis, and (de)differentiation. Receptor-mediated cell mechanosensing is a multistep process that is initiated by binding of cell surface receptors to their ligands on the extracellular matrix or the surface of adjacent cells. Mechanical cues are presented by the ligand and received by the receptor at the binding interface; but their transmission over space and time and their conversion into biochemical signals may involve other domains and additional molecules. In this review, a four-step model is described for the receptor-mediated cell mechanosensing process. Platelet glycoprotein Ib, T-cell receptor, and integrins are used as examples to illustrate the key concepts and players in this process.
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Affiliation(s)
- Yunfeng Chen
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332.,Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332
| | - Lining Ju
- Charles Perkins Centre and Heart Research Institute, University of Sydney, Camperdown, NSW 2006, Australia
| | - Muaz Rushdi
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332.,Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332
| | - Chenghao Ge
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332.,Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332
| | - Cheng Zhu
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332 .,Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332.,Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332
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44
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Ernandez T, Udwan K, Chassot A, Martin PY, Feraille E. Uninephrectomy and apical fluid shear stress decrease ENaC abundance in collecting duct principal cells. Am J Physiol Renal Physiol 2017; 314:F763-F772. [PMID: 28877879 DOI: 10.1152/ajprenal.00200.2017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Acute nephron reduction such as after living kidney donation may increase the risk of hypertension. Uninephrectomy induces major hemodynamic changes in the remaining kidney, resulting in rapid increase of single-nephron glomerular filtration rate (GFR) and fluid delivery in the distal nephron. Decreased sodium (Na) fractional reabsorption after the distal tubule has been reported after uninephrectomy in animals preserving volume homeostasis. In the present study, we thought to specifically explore the effect of unilateral nephrectomy on epithelial Na channel (ENaC) subunit expression in mice. We show that γ-ENaC subunit surface expression was specifically downregulated after uninephrectomy, whereas the expression of the aldosterone-sensitive α-ENaC and α1-Na-K-ATPase subunits as well as of kidney-specific Na-K-Cl cotransporter isoform and Na-Cl cotransporter were not significantly altered. Because acute nephron reduction induces a rapid increase of single-nephron GFR, resulting in a higher tubular fluid flow, we speculated that local mechanical factors such as fluid shear stress (FSS) were involved in Na reabsorption regulation after uninephrectomy. We further explore such hypothesis in an in vitro model of FSS applied on highly differentiated collecting duct principal cells. We found that FSS specifically downregulates β-ENaC and γ-ENaC subunits at the transcriptional level through an unidentified heat-insensitive paracrine basolateral factor. The primary cilium as a potential mechanosensor was not required. In contrast, protein kinase A and calcium-sensitive cytosolic phospholipase A2 were involved, but we could not demonstrate a role for cyclooxygenase or epoxygenase metabolites.
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Affiliation(s)
- T Ernandez
- Service of Nephrology, University Hospital of Geneva , Geneva , Switzerland.,Department of Cell Physiology and Metabolism, University Medical Center , Geneva , Switzerland
| | - K Udwan
- Department of Cell Physiology and Metabolism, University Medical Center , Geneva , Switzerland
| | - A Chassot
- Department of Cell Physiology and Metabolism, University Medical Center , Geneva , Switzerland
| | - P-Y Martin
- Service of Nephrology, University Hospital of Geneva , Geneva , Switzerland
| | - E Feraille
- Department of Cell Physiology and Metabolism, University Medical Center , Geneva , Switzerland
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45
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Nourse JL, Pathak MM. How cells channel their stress: Interplay between Piezo1 and the cytoskeleton. Semin Cell Dev Biol 2017; 71:3-12. [PMID: 28676421 DOI: 10.1016/j.semcdb.2017.06.018] [Citation(s) in RCA: 135] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 06/23/2017] [Accepted: 06/25/2017] [Indexed: 11/17/2022]
Abstract
Cells constantly encounter mechanical stimuli in their environment, such as dynamic forces and mechanical features of the extracellular matrix. These mechanical cues are transduced into biochemical signals, and integrated with genetic and chemical signals to modulate diverse physiological processes. Cells also actively generate forces to internally transport cargo, to explore the physical properties of their environment and to spatially position themselves and other cells during development. Mechanical forces are therefore central to development, homeostasis, and repair. Several molecular and biophysical strategies are utilized by cells for detecting and generating mechanical forces. Here we discuss an important class of molecules involved in sensing and transducing mechanical forces - mechanically-activated ion channels. We focus primarily on the Piezo1 ion channel, and examine its relationship with the cellular cytoskeleton.
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Affiliation(s)
- Jamison L Nourse
- Department of Physiology & Biophysics, Sue & Bill Gross Stem Cell Research Center, 835 Health Sciences Road, Room 275B, UC Irvine, Irvine, CA 92697, United States
| | - Medha M Pathak
- Department of Physiology & Biophysics, Sue & Bill Gross Stem Cell Research Center, 835 Health Sciences Road, Room 275B, UC Irvine, Irvine, CA 92697, United States.
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46
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Lembong J, Sabass B, Stone HA. Calcium oscillations in wounded fibroblast monolayers are spatially regulated through substrate mechanics. Phys Biol 2017; 14:045006. [PMID: 28378710 DOI: 10.1088/1478-3975/aa6b67] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The maintenance of tissue integrity is essential for the life of multicellular organisms. Healing of a skin wound is a paradigm for how various cell types localize and repair tissue perturbations in an orchestrated fashion. To investigate biophysical mechanisms associated with wound localization, we focus on a model system consisting of a fibroblast monolayer on an elastic substrate. We find that the creation of an edge in the monolayer causes cytosolic calcium oscillations throughout the monolayer. The oscillation frequency increases with cell density, which shows that wound-induced calcium oscillations occur collectively. Inhibition of myosin II reduces the number of oscillating cells, demonstrating a coupling between actomyosin activity and calcium response. The spatial distribution of oscillating cells depends on the stiffness of the substrate. For soft substrates with a Young's modulus E ~ 360 Pa, oscillations occur on average within 0.2 mm distance from the wound edge. Increasing substrate stiffness leads to an average localization of oscillations away from the edge (up to ~0.6 mm). In addition, we use traction force microscopy to determine stresses between cells and substrate. We find that an increase of substrate rigidity leads to a higher traction magnitude. For E < ~2 kPa, the traction magnitude is strongly concentrated at the monolayer edge, while for E > ~8 kPa, traction magnitude is on average almost uniform beneath the monolayer. Thus, the spatial occurrence of calcium oscillations correlates with the cell-substrate traction. Overall, the experiments with fibroblasts demonstrate a collective, chemomechanical localization mechanism at the edge of a wound with a potential physiological role.
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Affiliation(s)
- Josephine Lembong
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544, United States of America. Current address: Department of Bioengineering, University of Maryland, College Park, MD 20742, United States of America. These authors contributed equally to this work
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47
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Sheets K, Wang J, Zhao W, Kapania R, Nain AS. Nanonet Force Microscopy for Measuring Cell Forces. Biophys J 2017; 111:197-207. [PMID: 27410747 DOI: 10.1016/j.bpj.2016.05.031] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 05/11/2016] [Accepted: 05/16/2016] [Indexed: 01/03/2023] Open
Abstract
The influence of physical forces exerted by or felt by cells on cell shape, migration, and cytoskeleton arrangement is now widely acknowledged and hypothesized to occur due to modulation of cellular inside-out forces in response to changes in the external fibrous environment (outside-in). Our previous work using the non-electrospinning Spinneret-based Tunable Engineered Parameters' suspended fibers has revealed that cells are able to sense and respond to changes in fiber curvature and structural stiffness as evidenced by alterations to focal adhesion cluster lengths. Here, we present the development and application of a suspended nanonet platform for measuring C2C12 mouse myoblast forces attached to fibers of three diameters (250, 400, and 800 nm) representing a wide range of structural stiffness (3-50 nN/μm). The nanonet force microscopy platform measures cell adhesion forces in response to symmetric and asymmetric external perturbation in single and cyclic modes. We find that contractility-based, inside-out forces are evenly distributed at the edges of the cell, and that forces are dependent on fiber structural stiffness. Additionally, external perturbation in symmetric and asymmetric modes biases cell-fiber failure location without affecting the outside-in forces of cell-fiber adhesion. We then extend the platform to measure forces of (1) cell-cell junctions, (2) single cells undergoing cyclic perturbation in the presence of drugs, and (3) cancerous single-cells transitioning from a blebbing to a pseudopodial morphology.
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Affiliation(s)
- Kevin Sheets
- Departments of Biomedical Engineering and Sciences, Virginia Tech, Blacksburg, Virginia
| | - Ji Wang
- Departments of Biomedical Engineering and Sciences, Virginia Tech, Blacksburg, Virginia
| | - Wei Zhao
- Aerospace and Ocean Engineering, Virginia Tech, Blacksburg, Virginia
| | - Rakesh Kapania
- Aerospace and Ocean Engineering, Virginia Tech, Blacksburg, Virginia
| | - Amrinder S Nain
- Departments of Biomedical Engineering and Sciences, Virginia Tech, Blacksburg, Virginia; Mechanical Engineering, Virginia Tech, Blacksburg, Virginia.
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48
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Eberwein P, Reinhard T. [New biomaterials and alternative stem cell sources for the reconstruction of the limbal stem cell niche]. Ophthalmologe 2017; 114:318-326. [PMID: 28378048 DOI: 10.1007/s00347-017-0463-5] [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] [Indexed: 11/26/2022]
Abstract
Reconstruction of the limbal stem cell niche in patients with limbal stem cell insufficiency remains one of the most challenging tasks in the treatment of ocular surface diseases. Ex vivo expansion of limbal stem cells still has potential for optimization despite positive reports in centers worldwide. New biomaterials as well as alternative cell sources for the reconstruction of the limbal stem cell niche have been published in recent years. The aim of this review is to provide insight into new biomaterials and cell sources which may find their way into clinical routine in the upcoming decades.
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Affiliation(s)
- P Eberwein
- Klinik für Augenheilkunde, Uniklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Deutschland.
| | - T Reinhard
- Klinik für Augenheilkunde, Uniklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Deutschland
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49
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Intermediate filament reorganization dynamically influences cancer cell alignment and migration. Sci Rep 2017; 7:45152. [PMID: 28338091 PMCID: PMC5364536 DOI: 10.1038/srep45152] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 02/20/2017] [Indexed: 01/24/2023] Open
Abstract
The interactions between a cancer cell and its extracellular matrix (ECM) have been the focus of an increasing amount of investigation. The role of the intermediate filament keratin in cancer has also been coming into focus of late, but more research is needed to understand how this piece fits in the puzzle of cytoskeleton-mediated invasion and metastasis. In Panc-1 invasive pancreatic cancer cells, keratin phosphorylation in conjunction with actin inhibition was found to be sufficient to reduce cell area below either treatment alone. We then analyzed intersecting keratin and actin fibers in the cytoskeleton of cyclically stretched cells and found no directional correlation. The role of keratin organization in Panc-1 cellular morphological adaptation and directed migration was then analyzed by culturing cells on cyclically stretched polydimethylsiloxane (PDMS) substrates, nanoscale grates, and rigid pillars. In general, the reorganization of the keratin cytoskeleton allows the cell to become more ‘mobile’- exhibiting faster and more directed migration and orientation in response to external stimuli. By combining keratin network perturbation with a variety of physical ECM signals, we demonstrate the interconnected nature of the architecture inside the cell and the scaffolding outside of it, and highlight the key elements facilitating cancer cell-ECM interactions.
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50
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Swain MV, Nohava J, Eberwein P. A simple basis for determination of the modulus and hydraulic conductivity of human ocular surface using nano-indentation. Acta Biomater 2017; 50:312-321. [PMID: 28003145 DOI: 10.1016/j.actbio.2016.12.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 12/05/2016] [Accepted: 12/05/2016] [Indexed: 12/23/2022]
Abstract
This paper presents a simple analysis based upon Darcy's Law and indentation contact mechanics to determine the effective hydraulic conductivity and elastic modulus of fluid filled tissues. The approach is illustrated with the mechanical response of the human ocular surface using a 500μm radius spherical tipped indenter. Indentations of various regions of the ocular surface including the corneal stroma, limbal region and sclera have been conducted. Force-control indentations were made to a maximum force, which was maintained before unloading. Measurements of the indentation response of cornea at three different loading rates were also made. Elastic like response was observed during loading, which was followed by extensive creep prior to unloading. STATEMENT OF SIGNIFICANCE This manuscript attempts to provide a relatively simply model for the contact loading of fluid containing tissues and materials. It shows that the response of such materials provides a basis for determining the effective modulus and effective hydraulic conductivity (permeability) in much the same manner that hardness and modulus do for the indentation of elastic-plastic materials. Eye tissue with its anisotropic elastic and permeability properties is used to illustrate the approach.
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Affiliation(s)
- M V Swain
- Bioclinical Sciences, Faculty of Dentistry, Kuwait University, Kuwait.
| | - J Nohava
- Anton Paar, Rue de la Gare 4, 2034 Peseux, Switzerland
| | - P Eberwein
- Eye Medical Center, University of Freiburg, Germany
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