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Acharya BR, Fang JS, Jeffery ED, Chavkin NW, Genet G, Vasavada H, Nelson EA, Sheynkman GM, Humphries MJ, Hirschi KK. Connexin 37 sequestering of activated-ERK in the cytoplasm promotes p27-mediated endothelial cell cycle arrest. Life Sci Alliance 2023; 6:e202201685. [PMID: 37197981 PMCID: PMC10192821 DOI: 10.26508/lsa.202201685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 05/03/2023] [Accepted: 05/04/2023] [Indexed: 05/19/2023] Open
Abstract
Connexin37-mediated regulation of cell cycle modulators and, consequently, growth arrest lack mechanistic understanding. We previously showed that arterial shear stress up-regulates Cx37 in endothelial cells and activates a Notch/Cx37/p27 signaling axis to promote G1 cell cycle arrest, and this is required to enable arterial gene expression. However, how induced expression of a gap junction protein, Cx37, up-regulates cyclin-dependent kinase inhibitor p27 to enable endothelial growth suppression and arterial specification is unclear. Herein, we fill this knowledge gap by expressing wild-type and regulatory domain mutants of Cx37 in cultured endothelial cells expressing the Fucci cell cycle reporter. We determined that both the channel-forming and cytoplasmic tail domains of Cx37 are required for p27 up-regulation and late G1 arrest. Mechanistically, the cytoplasmic tail domain of Cx37 interacts with, and sequesters, activated ERK in the cytoplasm. This then stabilizes pERK nuclear target Foxo3a, which up-regulates p27 transcription. Consistent with previous studies, we found this Cx37/pERK/Foxo3a/p27 signaling axis functions downstream of arterial shear stress to promote endothelial late G1 state and enable up-regulation of arterial genes.
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Affiliation(s)
- Bipul R Acharya
- Department of Cell Biology, Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
- Wellcome Centre for Cell-Matrix Research, Faculty of Biology, Medicine & Health, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - Jennifer S Fang
- Department of Molecular Biology & Biochemistry, University of California at Irvine, Irvine, CA, USA
| | - Erin D Jeffery
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Nicholas W Chavkin
- Department of Cell Biology, Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Gael Genet
- Department of Cell Biology, Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Hema Vasavada
- Departments of Medicine and Genetics, Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT, USA
| | - Elizabeth A Nelson
- Department of Cell Biology, Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Gloria M Sheynkman
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA, USA
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA, USA
- UVA Comprehensive Cancer Center, University of Virginia, Charlottesville, VA, USA
| | - Martin J Humphries
- Wellcome Centre for Cell-Matrix Research, Faculty of Biology, Medicine & Health, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - Karen K Hirschi
- Department of Cell Biology, Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
- Departments of Medicine and Genetics, Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT, USA
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2
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Genet N, Genet G, Chavkin NW, Paila U, Fang JS, Vasavada HH, Goldberg JS, Acharya BR, Bhatt NS, Baker K, McDonnell SP, Huba M, Sankaranarayanan D, Ma GZM, Eichmann A, Thomas JL, Ffrench-Constant C, Hirschi KK. Connexin 43-mediated neurovascular interactions regulate neurogenesis in the adult brain subventricular zone. Cell Rep 2023; 42:112371. [PMID: 37043357 PMCID: PMC10564973 DOI: 10.1016/j.celrep.2023.112371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 02/20/2023] [Accepted: 03/22/2023] [Indexed: 04/13/2023] Open
Abstract
The subventricular zone (SVZ) is the largest neural stem cell (NSC) niche in the adult brain; herein, the blood-brain barrier is leaky, allowing direct interactions between NSCs and endothelial cells (ECs). Mechanisms by which direct NSC-EC interactions in the adult SVZ control NSC behavior are unclear. We found that Cx43 is highly expressed by SVZ NSCs and ECs, and its deletion in either leads to increased NSC proliferation and neuroblast generation, suggesting that Cx43-mediated NSC-EC interactions maintain NSC quiescence. This is further supported by single-cell RNA sequencing and in vitro studies showing that ECs control NSC proliferation by regulating expression of genes associated with NSC quiescence and/or activation in a Cx43-dependent manner. Cx43 mediates these effects in a channel-independent manner involving its cytoplasmic tail and ERK activation. Such insights inform adult NSC regulation and maintenance aimed at stem cell therapies for neurodegenerative disorders.
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Affiliation(s)
- Nafiisha Genet
- Department of Cell Biology, Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA; Departments of Medicine and Genetics, Yale University School of Medicine, New Haven, CT 06511, USA; Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT 06511, USA.
| | - Gael Genet
- Department of Cell Biology, Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Nicholas W Chavkin
- Department of Cell Biology, Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Umadevi Paila
- Department of Cell Biology, Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Jennifer S Fang
- Departments of Medicine and Genetics, Yale University School of Medicine, New Haven, CT 06511, USA; Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT 06511, USA
| | - Hema H Vasavada
- Department of Cell Biology, Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA; Departments of Medicine and Genetics, Yale University School of Medicine, New Haven, CT 06511, USA; Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT 06511, USA
| | - Joshua S Goldberg
- Departments of Medicine and Genetics, Yale University School of Medicine, New Haven, CT 06511, USA; Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT 06511, USA
| | - Bipul R Acharya
- Department of Cell Biology, Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Neha S Bhatt
- Departments of Medicine and Genetics, Yale University School of Medicine, New Haven, CT 06511, USA; Department of Cellular and Molecular Physiology, Yale University School of Medicine, New Haven, CT 06511, USA
| | - Kasey Baker
- Departments of Medicine and Genetics, Yale University School of Medicine, New Haven, CT 06511, USA; Department of Cellular and Molecular Physiology, Yale University School of Medicine, New Haven, CT 06511, USA; Departments of Neuroscience and Cell Biology, Yale University School of Medicine, New Haven, CT 06511, USA; Department of Neurology, Yale University School of Medicine, New Haven, CT 06511, USA; Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT 06511, USA
| | - Stephanie P McDonnell
- Department of Cell Biology, Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Mahalia Huba
- Department of Cell Biology, Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Danya Sankaranarayanan
- Department of Cell Biology, Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Gerry Z M Ma
- MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh, UK; Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, UK
| | - Anne Eichmann
- Department of Cellular and Molecular Physiology, Yale University School of Medicine, New Haven, CT 06511, USA; Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT 06511, USA
| | - Jean-Leon Thomas
- Departments of Neuroscience and Cell Biology, Yale University School of Medicine, New Haven, CT 06511, USA; Department of Neurology, Yale University School of Medicine, New Haven, CT 06511, USA; Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT 06511, USA
| | - Charles Ffrench-Constant
- MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh, UK; Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, UK
| | - Karen K Hirschi
- Department of Cell Biology, Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA; Departments of Medicine and Genetics, Yale University School of Medicine, New Haven, CT 06511, USA; Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT 06511, USA.
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3
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Wu SK, Gomez GA, Stehbens S, Acharya BR, Ratheesh A, Priya R, Lagendijk A, Bershadsky A. Editorial: Forces in biology - Cell and developmental mechanobiology and its implications in disease - Volume II. Front Cell Dev Biol 2022; 10:1082857. [PMID: 36531943 PMCID: PMC9753567 DOI: 10.3389/fcell.2022.1082857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 11/07/2022] [Indexed: 09/17/2023] Open
Affiliation(s)
- Selwin K. Wu
- Mechanobiology Institute, National University of Singapore, Singapore, Singapore
- Department of Biological Sciences, National University of Singapore, Singapore, Singapore
| | - Guillermo A. Gomez
- Centre for Cancer Biology, SA Pathology and University of South Australia, Adelaide, SA, Australia
| | - Samantha Stehbens
- Cell and Developmental Biology Division, Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Bipul R. Acharya
- Wellcome Centre for Cell-Matrix Research, Faculty of Biology, Medicine & Health, Manchester Academic Health Science Centre, University of Manchester, Manchester, United Kingdom
| | - Aparna Ratheesh
- Warwick Medical School, University of Warwick, Coventry, United Kingdom
| | | | - Anne Lagendijk
- Cell and Developmental Biology Division, Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
- School of Biomedical Sciences, The University of Queensland, Brisbane, QLD, Australia
| | - Alexander Bershadsky
- Mechanobiology Institute, National University of Singapore, Singapore, Singapore
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
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4
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Chavkin NW, Genet G, Poulet M, Jeffery ED, Marziano C, Genet N, Vasavada H, Nelson EA, Acharya BR, Kour A, Aragon J, McDonnell SP, Huba M, Sheynkman GM, Walsh K, Hirschi KK. Endothelial cell cycle state determines propensity for arterial-venous fate. Nat Commun 2022; 13:5891. [PMID: 36202789 PMCID: PMC9537338 DOI: 10.1038/s41467-022-33324-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Accepted: 09/09/2022] [Indexed: 12/15/2022] Open
Abstract
During blood vessel development, endothelial cells become specified toward arterial or venous fates to generate a circulatory network that provides nutrients and oxygen to, and removes metabolic waste from, all tissues. Arterial-venous specification occurs in conjunction with suppression of endothelial cell cycle progression; however, the mechanistic role of cell cycle state is unknown. Herein, using Cdh5-CreERT2;R26FUCCI2aR reporter mice, we find that venous endothelial cells are enriched for the FUCCI-Negative state (early G1) and BMP signaling, while arterial endothelial cells are enriched for the FUCCI-Red state (late G1) and TGF-β signaling. Furthermore, early G1 state is essential for BMP4-induced venous gene expression, whereas late G1 state is essential for TGF-β1-induced arterial gene expression. Pharmacologically induced cell cycle arrest prevents arterial-venous specification defects in mice with endothelial hyperproliferation. Collectively, our results show that distinct endothelial cell cycle states provide distinct windows of opportunity for the molecular induction of arterial vs. venous fate.
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Affiliation(s)
- Nicholas W. Chavkin
- grid.27755.320000 0000 9136 933XDepartment of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA 22908 USA ,grid.27755.320000 0000 9136 933XRobert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908 USA
| | - Gael Genet
- grid.27755.320000 0000 9136 933XDepartment of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA 22908 USA
| | - Mathilde Poulet
- grid.47100.320000000419368710Department of Medicine, Yale Cardiovascular Research Center Yale University School of Medicine, New Haven, CT 06520 USA
| | - Erin D. Jeffery
- grid.27755.320000 0000 9136 933XDepartment of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA 22908 USA
| | - Corina Marziano
- grid.27755.320000 0000 9136 933XDepartment of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA 22908 USA ,grid.27755.320000 0000 9136 933XRobert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908 USA
| | - Nafiisha Genet
- grid.27755.320000 0000 9136 933XDepartment of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA 22908 USA
| | - Hema Vasavada
- grid.47100.320000000419368710Department of Medicine, Yale Cardiovascular Research Center Yale University School of Medicine, New Haven, CT 06520 USA
| | - Elizabeth A. Nelson
- grid.27755.320000 0000 9136 933XDepartment of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA 22908 USA
| | - Bipul R. Acharya
- grid.27755.320000 0000 9136 933XDepartment of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA 22908 USA
| | - Anupreet Kour
- grid.27755.320000 0000 9136 933XRobert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908 USA
| | - Jordon Aragon
- grid.27755.320000 0000 9136 933XDepartment of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA 22908 USA
| | - Stephanie P. McDonnell
- grid.27755.320000 0000 9136 933XDepartment of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA 22908 USA
| | - Mahalia Huba
- grid.27755.320000 0000 9136 933XDepartment of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA 22908 USA
| | - Gloria M. Sheynkman
- grid.27755.320000 0000 9136 933XDepartment of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA 22908 USA ,grid.27755.320000 0000 9136 933XDepartment of Biochemistry and Molecular Genetics, University of Virginia School of Medicine, Charlottesville, VA 22908 USA ,grid.27755.320000 0000 9136 933XCenter for Public Health Genomics, University of Virginia School of Medicine, Charlottesville, VA 22908 USA ,grid.27755.320000 0000 9136 933XUVA Comprehensive Cancer Center, University of Virginia, Charlottesville, VA 22908 USA
| | - Kenneth Walsh
- grid.27755.320000 0000 9136 933XRobert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908 USA ,grid.27755.320000 0000 9136 933XHematovascular Biology Center, University of Virginia School of Medicine, Charlottesville, VA 22908 USA
| | - Karen K. Hirschi
- grid.27755.320000 0000 9136 933XDepartment of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA 22908 USA ,grid.27755.320000 0000 9136 933XRobert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908 USA ,grid.47100.320000000419368710Department of Medicine, Yale Cardiovascular Research Center Yale University School of Medicine, New Haven, CT 06520 USA
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5
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Mehlferber MM, Jeffery ED, Saquing J, Jordan BT, Sheynkman L, Murali M, Genet G, Acharya BR, Hirschi KK, Sheynkman GM. Characterization of protein isoform diversity in human umbilical vein endothelial cells via long-read proteogenomics. RNA Biol 2022; 19:1228-1243. [PMID: 36457147 PMCID: PMC9721438 DOI: 10.1080/15476286.2022.2141938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Endothelial cells (ECs) comprise the lumenal lining of all blood vessels and are critical for the functioning of the cardiovascular system. Their phenotypes can be modulated by alternative splicing of RNA to produce distinct protein isoforms. To characterize the RNA and protein isoform landscape within ECs, we applied a long read proteogenomics approach to analyse human umbilical vein endothelial cells (HUVECs). Transcripts delineated from PacBio sequencing serve as the basis for a sample-specific protein database used for downstream mass-spectrometry (MS) analysis to infer protein isoform expression. We detected 53,863 transcript isoforms from 10,426 genes, with 22,195 of those transcripts being novel. Furthermore, the predominant isoform in HUVECs does not correspond with the accepted "reference isoform" 25% of the time, with vascular pathway-related genes among this group. We found 2,597 protein isoforms supported through unique peptides, with an additional 2,280 isoforms nominated upon incorporation of long-read transcript evidence. We characterized a novel alternative acceptor for endothelial-related gene CDH5, suggesting potential changes in its associated signalling pathways. Finally, we identified novel protein isoforms arising from a diversity of RNA splicing mechanisms supported by uniquely mapped novel peptides. Our results represent a high-resolution atlas of known and novel isoforms of potential relevance to endothelial phenotypes and function.[Figure: see text].
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Affiliation(s)
- Madison M. Mehlferber
- Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA, USA,Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA
| | - Erin D. Jeffery
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA
| | - Jamie Saquing
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA
| | - Ben T. Jordan
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA
| | - Leon Sheynkman
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA
| | - Mayank Murali
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA
| | - Gael Genet
- Department of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Bipul R. Acharya
- Department of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA, USA,Cardiovascular Research Center, University of Virginia, Charlottesville, VA, USA,Wellcome Centre for Cell-Matrix Research, Faculty of Biology, Medicine and Health, the University of Manchester, UK
| | - Karen K. Hirschi
- Department of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA, USA,Cardiovascular Research Center, University of Virginia, Charlottesville, VA, USA
| | - Gloria M. Sheynkman
- Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA, USA,Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA,Center for Public Health Genomics, University of Virginia, Charlottesville, VA, USA,UVA Comprehensive Cancer Center, University of Virginia, Charlottesville, Virginia, USA,CONTACT Gloria M. Sheynkman The Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA, USA
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6
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Acharya BR. Can mechanical forces attune heterotypic cell-cell communications? J Biomech 2021; 121:110409. [PMID: 33845355 DOI: 10.1016/j.jbiomech.2021.110409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 02/18/2021] [Accepted: 02/22/2021] [Indexed: 10/21/2022]
Abstract
Heterotypic cell lineages relentlessly exchange biomechanical signals among themselves in metazoan organs. Hence, cell-cell communications are pivotal for organ physiology and pathogenesis. Every cell lineage of an organ responds differently to a specific signal due to its unique receptibility and signal interpretation capacity. These distinct cellular responses generate a system-scale signaling network that helps in generating a specific organ phenotype. Although the reciprocal biochemical signal exchange between non-identical neighboring cells is known to be an essential factor for organ functioning, if, then how, mechanical cues incite these signals is not yet quite explored. Cells within organ tissues experience multiple mechanical forces, such as stretching, bending, compression, and shear stress. Forms and magnitudes of mechanical forces influence biochemical signaling in a cell-specific manner. Additionally, the biophysical state of acellular extracellular matrix (ECM) can transmit exclusive mechanical cues to specific cells of an organ. As it scaffolds heterotypic cells and tissues in close proximities, therefore, ECM can easily be contemplated as a mechanical conduit for signal exchange among them. However, force-stimulated signal transduction is not always physiological, aberrant force sensing by tissue-resident cells can transduce anomalous signals to each other, and potentially can promote pathological phenotypes. Herein, I attempt to put forward a perspective on how mechanical forces may influence signal transductions among heterotypic cell populations and how they feedback each other to achieve a transient or perpetual alteration in metazoan organs. A mechanistic insight of organ scale mechanotransduction can emanate the possibility of finding potential biomarkers and novel therapeutic strategies to deal with pathogenesis and organ regeneration.
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Affiliation(s)
- Bipul R Acharya
- Department of Cell Biology, School of Medicine, University of Virginia, USA.
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7
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Teo JL, Gomez GA, Weeratunga S, Davies EM, Noordstra I, Budnar S, Katsuno-Kambe H, McGrath MJ, Verma S, Tomatis V, Acharya BR, Balasubramaniam L, Templin RM, McMahon KA, Lee YS, Ju RJ, Stebhens SJ, Ladoux B, Mitchell CA, Collins BM, Parton RG, Yap AS. Caveolae Control Contractile Tension for Epithelia to Eliminate Tumor Cells. Dev Cell 2020; 54:75-91.e7. [PMID: 32485139 DOI: 10.1016/j.devcel.2020.05.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 03/17/2020] [Accepted: 05/01/2020] [Indexed: 01/24/2023]
Abstract
Epithelia are active materials where mechanical tension governs morphogenesis and homeostasis. But how that tension is regulated remains incompletely understood. We now report that caveolae control epithelial tension and show that this is necessary for oncogene-transfected cells to be eliminated by apical extrusion. Depletion of caveolin-1 (CAV1) increased steady-state tensile stresses in epithelial monolayers. As a result, loss of CAV1 in the epithelial cells surrounding oncogene-expressing cells prevented their apical extrusion. Epithelial tension in CAV1-depleted monolayers was increased by cortical contractility at adherens junctions. This reflected a signaling pathway, where elevated levels of phosphoinositide-4,5-bisphosphate (PtdIns(4,5)P2) recruited the formin, FMNL2, to promote F-actin bundling. Steady-state monolayer tension and oncogenic extrusion were restored to CAV1-depleted monolayers when tension was corrected by depleting FMNL2, blocking PtdIns(4,5)P2, or disabling the interaction between FMNL2 and PtdIns(4,5)P2. Thus, caveolae can regulate active mechanical tension for epithelial homeostasis by controlling lipid signaling to the actin cytoskeleton.
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Affiliation(s)
- Jessica L Teo
- Division of Cell and Developmental Biology, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Guillermo A Gomez
- Division of Cell and Developmental Biology, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia; Centre for Cancer Biology, SA Pathology and University of South Australia, Adelaide, SA 5000, Australia
| | - Saroja Weeratunga
- Division of Cell and Developmental Biology, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Elizabeth M Davies
- Cancer Program, Monash Biomedicine Discovery Institute, Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia
| | - Ivar Noordstra
- Division of Cell and Developmental Biology, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Srikanth Budnar
- Division of Cell and Developmental Biology, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Hiroko Katsuno-Kambe
- Division of Cell and Developmental Biology, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Meagan J McGrath
- Cancer Program, Monash Biomedicine Discovery Institute, Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia
| | - Suzie Verma
- Division of Cell and Developmental Biology, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Vanesa Tomatis
- Division of Cell and Developmental Biology, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Bipul R Acharya
- Division of Cell and Developmental Biology, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | | | - Rachel M Templin
- Division of Cell and Developmental Biology, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Kerrie-Ann McMahon
- Division of Cell and Developmental Biology, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Yoke Seng Lee
- Mater Research Institute, The University of Queensland, Translational Research Institute, Woolloongabba, Brisbane, QLD 4102, Australia
| | - Robert J Ju
- The University of Queensland Diamantina Institute, Translational Research Institute, Woolloongabba, Brisbane, QLD 4102, Australia
| | - Samantha J Stebhens
- The University of Queensland Diamantina Institute, Translational Research Institute, Woolloongabba, Brisbane, QLD 4102, Australia
| | - Benoit Ladoux
- Institut Jacques Monod, Université de Paris, CNRS UMR 7592, 75013 Paris, France
| | - Christina A Mitchell
- Cancer Program, Monash Biomedicine Discovery Institute, Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia
| | - Brett M Collins
- Division of Cell and Developmental Biology, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Robert G Parton
- Division of Cell and Developmental Biology, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia; Centre for Microscopy and Microanalysis, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia.
| | - Alpha S Yap
- Division of Cell and Developmental Biology, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia.
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Acharya BR, Nestor-Bergmann A, Liang X, Gupta S, Duszyc K, Gauquelin E, Gomez GA, Budnar S, Marcq P, Jensen OE, Bryant Z, Yap AS. A Mechanosensitive RhoA Pathway that Protects Epithelia against Acute Tensile Stress. Dev Cell 2018; 47:439-452.e6. [PMID: 30318244 DOI: 10.1016/j.devcel.2018.09.016] [Citation(s) in RCA: 88] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 07/16/2018] [Accepted: 09/15/2018] [Indexed: 12/22/2022]
Abstract
Adherens junctions are tensile structures that couple epithelial cells together. Junctional tension can arise from cell-intrinsic application of contractility or from the cell-extrinsic forces of tissue movement. Here, we report a mechanosensitive signaling pathway that activates RhoA at adherens junctions to preserve epithelial integrity in response to acute tensile stress. We identify Myosin VI as the force sensor, whose association with E-cadherin is enhanced when junctional tension is increased by mechanical monolayer stress. Myosin VI promotes recruitment of the heterotrimeric Gα12 protein to E-cadherin, where it signals for p114 RhoGEF to activate RhoA. Despite its potential to stimulate junctional actomyosin and further increase contractility, tension-activated RhoA signaling is necessary to preserve epithelial integrity. This is explained by an increase in tensile strength, especially at the multicellular vertices of junctions, that is due to mDia1-mediated actin assembly.
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Affiliation(s)
- Bipul R Acharya
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Alexander Nestor-Bergmann
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 3DY, UK
| | - Xuan Liang
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Shafali Gupta
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Kinga Duszyc
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Estelle Gauquelin
- Institut Jacques Monod, CNRS, UMR 7592, Universite Paris Diderot, Sorbonne Paris Cité, Paris 75205, France
| | - Guillermo A Gomez
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Srikanth Budnar
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Philippe Marcq
- Physico Chimie Curie, Institut Curie, Sorbonne Universite, PSL Research University, Paris and CNRS UMR 168, Paris 75005, France
| | - Oliver E Jensen
- School of Mathematics, University of Manchester, Manchester M13 9PL, UK
| | - Zev Bryant
- Department of Bioengineering, Stanford University and Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Alpha S Yap
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia.
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Gao X, Acharya BR, Engl WCO, De Mets R, Thiery JP, Yap AS, Viasnoff V. Probing compression versus stretch activated recruitment of cortical actin and apical junction proteins using mechanical stimulations of suspended doublets. APL Bioeng 2018; 2:026111. [PMID: 31069308 PMCID: PMC6481720 DOI: 10.1063/1.5025216] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 05/14/2018] [Indexed: 11/25/2022] Open
Abstract
We report an experimental approach to study the mechanosensitivity of cell-cell contact upon mechanical stimulation in suspended cell-doublets. The doublet is placed astride an hourglass aperture, and a hydrodynamic force is selectively exerted on only one of the cells. The geometry of the device concentrates the mechanical shear over the junction area. Together with mechanical shear, the system also allows confocal quantitative live imaging of the recruitment of junction proteins (e.g., E-cadherin, ZO-1, occludin, and actin). We observed the time sequence over which proteins were recruited to the stretched region of the contact. The compressed side of the contact showed no response. We demonstrated how this mechanism polarizes the stress-induced recruitment of junctional components within one single junction. Finally, we demonstrated that stabilizing the actin cortex dynamics abolishes the mechanosensitive response of the junction. Our experimental design provides an original approach to study the role of mechanical force at a cell-cell contact with unprecedented control over stress application and quantitative optical analysis.
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Affiliation(s)
- Xumei Gao
- Mechanobiology Institute, Singapore, Level 5, T-Lab Building, 5A Engineering Drive 1, Singapore 117411
| | - Bipul R Acharya
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Wilfried Claude Otto Engl
- Mechanobiology Institute, Singapore, Level 5, T-Lab Building, 5A Engineering Drive 1, Singapore 117411
| | - Richard De Mets
- Mechanobiology Institute, Singapore, Level 5, T-Lab Building, 5A Engineering Drive 1, Singapore 117411
| | - Jean Paul Thiery
- Institute of Molecular and Cell Biology, 61 Biopolis Drive, Proteos building, Singapore 138673
| | - Alpha S Yap
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland 4072, Australia
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10
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Choi W, Acharya BR, Peyret G, Fardin MA, Mège RM, Ladoux B, Yap AS, Fanning AS, Peifer M. Remodeling the zonula adherens in response to tension and the role of afadin in this response. J Cell Biol 2017; 213:243-60. [PMID: 27114502 PMCID: PMC5084271 DOI: 10.1083/jcb.201506115] [Citation(s) in RCA: 125] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 03/21/2016] [Indexed: 12/31/2022] Open
Abstract
During development, epithelial cells must generate and respond to tension without disrupting epithelial barrier function. The authors use superresolution microscopy in MDCK cells to examine how the zonula adherens (ZA) is remodeled in response to elevated contractility while maintain tissue integrity. They define key roles for zonula occludens family proteins in regulating contractility and for the scaffolding protein afadin in maintaining ZA architecture at tricellular junctions. Morphogenesis requires dynamic coordination between cell–cell adhesion and the cytoskeleton to allow cells to change shape and move without losing tissue integrity. We used genetic tools and superresolution microscopy in a simple model epithelial cell line to define how the molecular architecture of cell–cell zonula adherens (ZA) is modified in response to elevated contractility, and how these cells maintain tissue integrity. We previously found that depleting zonula occludens 1 (ZO-1) family proteins in MDCK cells induces a highly organized contractile actomyosin array at the ZA. We find that ZO knockdown elevates contractility via a Shroom3/Rho-associated, coiled-coil containing protein kinase (ROCK) pathway. Our data suggest that each bicellular border is an independent contractile unit, with actin cables anchored end-on to cadherin complexes at tricellular junctions. Cells respond to elevated contractility by increasing junctional afadin. Although ZO/afadin knockdown did not prevent contractile array assembly, it dramatically altered cell shape and barrier function in response to elevated contractility. We propose that afadin acts as a robust protein scaffold that maintains ZA architecture at tricellular junctions.
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Affiliation(s)
- Wangsun Choi
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Bipul R Acharya
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland, Australia 4072
| | - Grégoire Peyret
- Institut Jacques Monod, Centre National de la Recherche Scientifique UMR 7592 and Université Paris Diderot, 75013 Paris, France
| | - Marc-Antoine Fardin
- Institut Jacques Monod, Centre National de la Recherche Scientifique UMR 7592 and Université Paris Diderot, 75013 Paris, France
| | - René-Marc Mège
- Institut Jacques Monod, Centre National de la Recherche Scientifique UMR 7592 and Université Paris Diderot, 75013 Paris, France
| | - Benoit Ladoux
- Institut Jacques Monod, Centre National de la Recherche Scientifique UMR 7592 and Université Paris Diderot, 75013 Paris, France Mechanobiology Institute, National University of Singapore, Singapore 117411, Singapore
| | - Alpha S Yap
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland, Australia 4072
| | - Alan S Fanning
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Mark Peifer
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
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Priya R, Gomez GA, Budnar S, Acharya BR, Czirok A, Yap AS, Neufeld Z. Bistable front dynamics in a contractile medium: Travelling wave fronts and cortical advection define stable zones of RhoA signaling at epithelial adherens junctions. PLoS Comput Biol 2017; 13:e1005411. [PMID: 28273072 PMCID: PMC5362241 DOI: 10.1371/journal.pcbi.1005411] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 03/22/2017] [Accepted: 02/07/2017] [Indexed: 12/24/2022] Open
Abstract
Mechanical coherence of cell layers is essential for epithelia to function as tissue barriers and to control active tissue dynamics during morphogenesis. RhoA signaling at adherens junctions plays a key role in this process by coupling cadherin-based cell-cell adhesion together with actomyosin contractility. Here we propose and analyze a mathematical model representing core interactions involved in the spatial localization of junctional RhoA signaling. We demonstrate how the interplay between biochemical signaling through positive feedback, combined with diffusion on the cell membrane and mechanical forces generated in the cortex, can determine the spatial distribution of RhoA signaling at cell-cell junctions. This dynamical mechanism relies on the balance between a propagating bistable signal that is opposed by an advective flow generated by an actomyosin stress gradient. Experimental observations on the behavior of the system when contractility is inhibited are in qualitative agreement with the predictions of the model.
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Affiliation(s)
- Rashmi Priya
- Institute for Molecular Bioscience, Division of Cell Biology and Molecular Medicine, The University of Queensland, St. Lucia, Brisbane, Queensland, Australia
| | - Guillermo A. Gomez
- Institute for Molecular Bioscience, Division of Cell Biology and Molecular Medicine, The University of Queensland, St. Lucia, Brisbane, Queensland, Australia
| | - Srikanth Budnar
- Institute for Molecular Bioscience, Division of Cell Biology and Molecular Medicine, The University of Queensland, St. Lucia, Brisbane, Queensland, Australia
| | - Bipul R. Acharya
- Institute for Molecular Bioscience, Division of Cell Biology and Molecular Medicine, The University of Queensland, St. Lucia, Brisbane, Queensland, Australia
| | - Andras Czirok
- Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, Kansas, United States of America
| | - Alpha S. Yap
- Institute for Molecular Bioscience, Division of Cell Biology and Molecular Medicine, The University of Queensland, St. Lucia, Brisbane, Queensland, Australia
| | - Zoltan Neufeld
- School of Mathematics and Physics, The University of Queensland, St. Lucia, Brisbane, Queensland, Australia
- * E-mail:
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12
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Acharya BR, Wu SK, Lieu ZZ, Parton RG, Grill SW, Bershadsky AD, Gomez GA, Yap AS. Mammalian Diaphanous 1 Mediates a Pathway for E-cadherin to Stabilize Epithelial Barriers through Junctional Contractility. Cell Rep 2017; 18:2854-2867. [DOI: 10.1016/j.celrep.2017.02.078] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Revised: 01/19/2017] [Accepted: 02/27/2017] [Indexed: 01/08/2023] Open
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13
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Michael M, Meiring JCM, Acharya BR, Matthews DR, Verma S, Han SP, Hill MM, Parton RG, Gomez GA, Yap AS. Coronin 1B Reorganizes the Architecture of F-Actin Networks for Contractility at Steady-State and Apoptotic Adherens Junctions. Dev Cell 2016; 37:58-71. [PMID: 27046832 DOI: 10.1016/j.devcel.2016.03.008] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 02/19/2016] [Accepted: 03/08/2016] [Indexed: 01/21/2023]
Abstract
In this study we sought to identify how contractility at adherens junctions influences apoptotic cell extrusion. We first found that the generation of effective contractility at steady-state junctions entails a process of architectural reorganization whereby filaments that are initially generated as poorly organized networks of short bundles are then converted into co-aligned perijunctional bundles. Reorganization requires coronin 1B, which is recruited to junctions by E-cadherin adhesion and is necessary to establish contractile tension at the zonula adherens. When cells undergo apoptosis within an epithelial monolayer, coronin 1B is also recruited to the junctional cortex at the apoptotic/neighbor cell interface in an E-cadherin-dependent fashion to support actin architectural reorganization, contractility, and extrusion. We propose that contractile stress transmitted from the apoptotic cell through E-cadherin adhesions elicits a mechanosensitive response in neighbor cells that is necessary for the morphogenetic event of apoptotic extrusion to occur.
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Affiliation(s)
- Magdalene Michael
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia; Randall Division of Cell and Molecular Biophysics, King's College London, Guy's Campus, London SE1 1UL, UK
| | - Joyce C M Meiring
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Bipul R Acharya
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Daniel R Matthews
- Queensland Brain Institute, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Suzie Verma
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Siew Ping Han
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Michelle M Hill
- University of Queensland Diamantina Institute, Translational Research Institute, The University of Queensland, Woolloongabba, Brisbane, QLD 4102, Australia
| | - Robert G Parton
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia; NHMRC Program in Membrane Interface Biology, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia; Centre for Microscopy and Microanalysis, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Guillermo A Gomez
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Alpha S Yap
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia; NHMRC Program in Membrane Interface Biology, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia.
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14
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Oh TG, Wang SCM, Acharya BR, Goode JM, Graham JD, Clarke CL, Yap AS, Muscat GEO. The Nuclear Receptor, RORγ, Regulates Pathways Necessary for Breast Cancer Metastasis. EBioMedicine 2016; 6:59-72. [PMID: 27211549 PMCID: PMC4856749 DOI: 10.1016/j.ebiom.2016.02.028] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 02/09/2016] [Accepted: 02/16/2016] [Indexed: 12/11/2022] Open
Abstract
We have previously reported that RORγ expression was decreased in ER-ve breast cancer, and increased expression improves clinical outcomes. However, the underlying RORγ dependent mechanisms that repress breast carcinogenesis have not been elucidated. Here we report that RORγ negatively regulates the oncogenic TGF-β/EMT and mammary stem cell (MaSC) pathways, whereas RORγ positively regulates DNA-repair. We demonstrate that RORγ expression is: (i) decreased in basal-like subtype cancers, and (ii) inversely correlated with histological grade and drivers of carcinogenesis in breast cancer cohorts. Furthermore, integration of RNA-seq and ChIP-chip data reveals that RORγ regulates the expression of many genes involved in TGF-β/EMT-signaling, DNA-repair and MaSC pathways (including the non-coding RNA, LINC00511). In accordance, pharmacological studies demonstrate that an RORγ agonist suppresses breast cancer cell viability, migration, the EMT transition (microsphere outgrowth) and mammosphere-growth. In contrast, RNA-seq demonstrates an RORγ inverse agonist induces TGF-β/EMT-signaling. These findings suggest pharmacological modulation of RORγ activity may have utility in breast cancer.
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Affiliation(s)
- Tae Gyu Oh
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Shu-Ching M Wang
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Bipul R Acharya
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Joel M Goode
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - J Dinny Graham
- Westmead Millennium Institute, Sydney Medical School, The University of Sydney, Sydney, NSW 2006, Australia
| | - Christine L Clarke
- Westmead Millennium Institute, Sydney Medical School, The University of Sydney, Sydney, NSW 2006, Australia
| | - Alpha S Yap
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - George E O Muscat
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia.
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15
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Acharya BR, Espenel C, Libanje F, Raingeaud J, Morgan J, Jaulin F, Kreitzer G. KIF17 regulates RhoA-dependent actin remodeling at epithelial cell-cell adhesions. J Cell Sci 2016; 129:957-70. [PMID: 26759174 DOI: 10.1242/jcs.173674] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 12/31/2015] [Indexed: 12/18/2022] Open
Abstract
The kinesin KIF17 localizes at microtubule plus-ends where it contributes to regulation of microtubule stabilization and epithelial polarization. We now show that KIF17 localizes at cell-cell adhesions and that KIF17 depletion inhibits accumulation of actin at the apical pole of cells grown in 3D organotypic cultures and alters the distribution of actin and E-cadherin in cells cultured in 2D on solid supports. Overexpression of full-length KIF17 constructs or truncation mutants containing the N-terminal motor domain resulted in accumulation of newly incorporated GFP-actin into junctional actin foci, cleared E-cadherin from cytoplasmic vesicles and stabilized cell-cell adhesions to challenge with calcium depletion. Expression of these KIF17 constructs also increased cellular levels of active RhoA, whereas active RhoA was diminished in KIF17-depleted cells. Inhibition of RhoA or its effector ROCK, or expression of LIMK1 kinase-dead or activated cofilin(S3A) inhibited KIF17-induced junctional actin accumulation. Interestingly, KIF17 activity toward actin depends on the motor domain but is independent of microtubule binding. Together, these data show that KIF17 can modify RhoA-GTPase signaling to influence junctional actin and the stability of the apical junctional complex of epithelial cells.
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Affiliation(s)
- Bipul R Acharya
- Department of Cell and Developmental Biology, Weill Cornell Medical College of Cornell University, New York, NY, USA
| | - Cedric Espenel
- Department of Cell and Developmental Biology, Weill Cornell Medical College of Cornell University, New York, NY, USA
| | - Fotine Libanje
- Gustave Roussy Institute, UMR-8126, 114 rue Edouard Vaillant, Villejuif 94805, France
| | - Joel Raingeaud
- Gustave Roussy Institute, UMR-8126, 114 rue Edouard Vaillant, Villejuif 94805, France
| | - Jessica Morgan
- Department of Cell and Developmental Biology, Weill Cornell Medical College of Cornell University, New York, NY, USA
| | - Fanny Jaulin
- Gustave Roussy Institute, UMR-8126, 114 rue Edouard Vaillant, Villejuif 94805, France
| | - Geri Kreitzer
- Department of Cell and Developmental Biology, Weill Cornell Medical College of Cornell University, New York, NY, USA
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17
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Acharya BR, Chatterjee A, Ganguli A, Bhattacharya S, Chakrabarti G. Thymoquinone inhibits microtubule polymerization by tubulin binding and causes mitotic arrest following apoptosis in A549 cells. Biochimie 2014; 97:78-91. [DOI: 10.1016/j.biochi.2013.09.025] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Accepted: 09/26/2013] [Indexed: 10/26/2022]
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18
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Abstract
We showed previously that the kinesin-2 motor KIF17 regulates microtubule (MT) dynamics and organization to promote epithelial differentiation. How KIF17 activity is regulated during this process remains unclear. Several kinesins, including KIF17, adopt compact and extended conformations that reflect autoinhibited and active states, respectively. We designed biosensors of KIF17 to monitor its activity directly in single cells using fluorescence lifetime imaging to detect Förster resonance energy transfer. Lifetime data are mapped on a phasor plot, allowing us to resolve populations of active and inactive motors in individual cells. Using this biosensor, we demonstrate that PKC contributes to the activation of KIF17 and that this is required for KIF17 to stabilize MTs in epithelia. Furthermore, we show that EB1 recruits KIF17 to dynamic MTs, enabling its accumulation at MT ends and thus promoting MT stabilization at discrete cellular domains.
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Affiliation(s)
- Cedric Espenel
- Department of Cell and Developmental Biology, Weill Cornell Medical College of Cornell University, New York, NY 10021
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19
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Abstract
KIF17 is a kinesin-2 family motor that interacts with EB1 at microtubule (MT) plus-ends and contributes to MT stabilization in epithelial cells. The mechanism by which KIF17 affects MTs and how its activity is regulated are not yet known. Here, we show that EB1 and the KIF17 autoinhibitory tail domain (KIF17-Tail) interacted competitively with the KIF17 catalytic motor domain (K370). Both EB1 and KIF17-Tail decreased the K0.5MT of K370, with opposing effects on MT-stimulated ATPase activity. Importantly, K370 had independent effects on MT dynamic instability, resulting in formation of long MTs without affecting polymerization rate or total polymer mass. K370 also inhibited MT depolymerization induced by dilution in vitro and by nocodazole in cells, suggesting that it acts by protecting MT plus-ends. Interestingly, KIF17-Tail bound MTs and tubulin dimers, delaying initial MT polymerization in vitro and MT regrowth in cells. However, neither EB1 nor KIF17-Tail affected K370-mediated MT polymerization or stabilization significantly in vitro, and EB1 was dispensable for MT stabilization by K370 in cells. Thus, although EB1 and KIF17-Tail may coordinate KIF17 catalytic activity, our data reveal a novel and direct role for KIF17 in regulating MT dynamics.
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Affiliation(s)
- Bipul R Acharya
- From the Department of Cell and Developmental Biology, Weill Medical College of Cornell University, New York, New York 10065
| | - Cedric Espenel
- From the Department of Cell and Developmental Biology, Weill Medical College of Cornell University, New York, New York 10065
| | - Geri Kreitzer
- From the Department of Cell and Developmental Biology, Weill Medical College of Cornell University, New York, New York 10065.
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Choudhury D, Ganguli A, Dastidar DG, Acharya BR, Das A, Chakrabarti G. Apigenin shows synergistic anticancer activity with curcumin by binding at different sites of tubulin. Biochimie 2013; 95:1297-309. [DOI: 10.1016/j.biochi.2013.02.010] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Accepted: 02/15/2013] [Indexed: 02/05/2023]
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21
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Acharya BR, Bhattacharyya S, Choudhury D, Chakrabarti G. The microtubule depolymerizing agent naphthazarin induces both apoptosis and autophagy in A549 lung cancer cells. Apoptosis 2011; 16:924-39. [PMID: 21667044 DOI: 10.1007/s10495-011-0613-1] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Naphthazarin (DHNQ, 5,8-dihydroxy-l,4-naphthoquinone) is a naturally available 1,4-naphthoquinone derivatives. In this study, we focused on elucidating the cytotoxic mechanism of naphthazarin in A549 non-small cell lung carcinoma cells. Naphthazarin reduced the A549 cell viability considerably with an IC(50) of 16.4 ± 1.6 μM. Naphthazarin induced cell death in a dose- and time-dependent manner by activating apoptosis and autophagy pathways. Specifically, we found naphthazarin inhibited the PI3K/Akt cell survival signalling pathway, measured by p53 and caspase-3 activation, and PARP cleavage. It also resulted in an increase in the ratio of Bax/Bcl2 protein levels, indicating activation of the mitochondrial apoptotic pathway. Similarly naphthazarin triggered LC3II expression and induced autophagic flux in A549 cells. We demonstrated further that naphthazarin is a microtubule inhibitor in cell-free system and in A549 cells. Naphthazarin treatment depolymerized interphase microtubules and disorganised spindle microtubules and the majority of cells arrested at the G(2)/M transition. Together, these data suggest that naphthazarin, a microtubule depolymerizer which activates dual cell death machineries, could be a potential novel chemotherapeutic agent.
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Affiliation(s)
- Bipul R Acharya
- Department of Biotechnology and Dr. B.C. Guha Centre for Genetic Engineering and Biotechnology, University of Calcutta, Kolkata, WB, India
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Acharya BR, Choudhury D, Das A, Chakrabarti G. Vitamin K3 Disrupts the Microtubule Networks by Binding to Tubulin: A Novel Mechanism of Its Antiproliferative Activity. Biochemistry 2009; 48:6963-74. [DOI: 10.1021/bi900152k] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bipul R. Acharya
- Department of Biotechnology and Dr. B. C. Guha Centre for Genetic Engineering and Biotechnology, University of Calcutta, 35 Ballygunge Circular Road Kolkata, WB 700019, India
| | - Diptiman Choudhury
- Department of Biotechnology and Dr. B. C. Guha Centre for Genetic Engineering and Biotechnology, University of Calcutta, 35 Ballygunge Circular Road Kolkata, WB 700019, India
| | - Amlan Das
- Department of Biotechnology and Dr. B. C. Guha Centre for Genetic Engineering and Biotechnology, University of Calcutta, 35 Ballygunge Circular Road Kolkata, WB 700019, India
| | - Gopal Chakrabarti
- Department of Biotechnology and Dr. B. C. Guha Centre for Genetic Engineering and Biotechnology, University of Calcutta, 35 Ballygunge Circular Road Kolkata, WB 700019, India
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Acharya BR, Bhattacharyya B, Chakrabarti G. The Natural Naphthoquinone Plumbagin Exhibits Antiproliferative Activity and Disrupts the Microtubule Network through Tubulin Binding. Biochemistry 2008; 47:7838-45. [DOI: 10.1021/bi800730q] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Bipul R. Acharya
- Dr. B. C. Guha Centre for Genetic Engineering and Biotechnology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, WB 700019, India, and Department of Biochemistry, Bose Institute, Kolkata, WB 700054, India
| | - Bhabatarak Bhattacharyya
- Dr. B. C. Guha Centre for Genetic Engineering and Biotechnology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, WB 700019, India, and Department of Biochemistry, Bose Institute, Kolkata, WB 700054, India
| | - Gopal Chakrabarti
- Dr. B. C. Guha Centre for Genetic Engineering and Biotechnology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, WB 700019, India, and Department of Biochemistry, Bose Institute, Kolkata, WB 700054, India
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Das A, Sinha S, Acharya BR, Paul P, Bhattacharyya B, Chakrabarti G. Deuterium oxide stabilizes conformation of tubulin:a biophysical and biochemical study. BMB Rep 2008; 41:62-7. [PMID: 18304452 DOI: 10.5483/bmbrep.2008.41.1.062] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The present study was aimed to elucidate the mechanism of stabilization of tubulin by deuterium oxide (D(2)O). Rate of decrease of tryptophan fluorescence during aging of tubulin at 4 degrees C and 37 degrees C was significantly lower in D(2)O than in H(2)O. Circular dichroism spectra of tubulin after incubation at 4 degrees C, suggested that complete stabilization of the secondary structure in D(2)O during the first 24 hours of incubation. The number of available cysteine measured by DTNB reaction was decreased to a lesser extent in D(2)O than in H(2)O. During the increase in temperature of tubulin, the rate of decrease of fluorescence at 335 nm and change of CD value at 222 nm was lesser in D(2)O. Differential Scanning calorimetric experiments showed that the T(m) values for tubulin unfolding in D(2)O were 58.6 degrees C and 62.17 degrees C, and in H(2)O those values were 55.4 degrees C and 59.35 degrees C.
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Affiliation(s)
- Amlan Das
- Dr. B.C. Guha Centre for Genetic Engineering and Biotechnology, University of Calcutta, Kolkata, India
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Acharya BR, Kim JH, Kumar S. Material-independent determination of anchoring properties on rubbed polyimide surfaces. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1999; 60:6841-6. [PMID: 11970604 DOI: 10.1103/physreve.60.6841] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/1999] [Indexed: 04/18/2023]
Abstract
A material-independent method for determining liquid-crystal (LC) anchoring energy on rubbed polyimide (PI) surfaces has been devised. This method exploits the changes in the easy axis of rubbed PI film induced by exposure to linearly polarized UV (LPUV) light. The distribution of PI chains in a rubbed film is approximated by a Gaussian function and its width determined from the measured rotation of the LC easy axis as a function of exposure time. A quasimicroscopic free energy of the LC-substrate interface is used to model LC anchoring properties. The experimental and calculated values of the azimuthal anchoring energy are in good agreement and found to depend inversely on the width of the distribution function. The measurements of the width of the chain distribution function provide a simple LC material-independent method for determining the LC anchoring properties. With this method, it is also possible to calculate the strength of the interaction between PI chains and LC molecules.
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Affiliation(s)
- B R Acharya
- Department of Physics, Kent State University, Kent, Ohio 44242, USA
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