101
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Rognoni E, Walko G. The Roles of YAP/TAZ and the Hippo Pathway in Healthy and Diseased Skin. Cells 2019; 8:cells8050411. [PMID: 31058846 PMCID: PMC6562585 DOI: 10.3390/cells8050411] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 04/19/2019] [Accepted: 04/30/2019] [Indexed: 12/15/2022] Open
Abstract
Skin is the largest organ of the human body. Its architecture and physiological functions depend on diverse populations of epidermal cells and dermal fibroblasts. Reciprocal communication between the epidermis and dermis plays a key role in skin development, homeostasis and repair. While several stem cell populations have been identified in the epidermis with distinct locations and functions, there is additional heterogeneity within the mesenchymal cells of the dermis. Here, we discuss the current knowledge of how the Hippo pathway and its downstream effectors Yes-associated protein (YAP) and transcriptional coactivator with PDZ-binding motif (TAZ) contribute to the maintenance, activation and coordination of the epidermal and dermal cell populations during development, homeostasis, wound healing and cancer.
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Affiliation(s)
- Emanuel Rognoni
- Centre for Endocrinology, William Harvey Research Institute, Barts and The London School of Medicine, Queen Mary University of London, London EC1M 6BQ, UK.
| | - Gernot Walko
- Department of Biology and Biochemistry & Centre for Therapeutic Innovation, University of Bath, Claverton Down, Bath BA2 7AY, UK.
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102
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Boopathy GTK, Hong W. Role of Hippo Pathway-YAP/TAZ Signaling in Angiogenesis. Front Cell Dev Biol 2019; 7:49. [PMID: 31024911 PMCID: PMC6468149 DOI: 10.3389/fcell.2019.00049] [Citation(s) in RCA: 211] [Impact Index Per Article: 42.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 03/19/2019] [Indexed: 12/12/2022] Open
Abstract
Angiogenesis is a highly coordinated process of formation of new blood vessels from pre-existing blood vessels. The process of development of the proper vascular network is a complex process that is crucial for the vertebrate development. Several studies have defined essential roles of Hippo pathway-YAP/TAZ in organ size control, tissue regeneration, and self-renewal. Thus Hippo pathway is one of the central components in tissue homeostasis. There are mounting evidences on the eminence of Hippo pathway-YAP/TAZ in angiogenesis in multiple model organisms. Hippo pathway-YAP/TAZ is now demonstrated to regulate endothelial cell proliferation, migration and survival; subsequently regulating vascular sprouting, vascular barrier formation, and vascular remodeling. Major intracellular signaling programs that regulate angiogenesis concomitantly activate YAP/TAZ to regulate key events in angiogenesis. In this review, we provide a brief overview of the recent findings in the Hippo pathway and YAP/TAZ signaling in angiogenesis.
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Affiliation(s)
- Gandhi T K Boopathy
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore
| | - Wanjin Hong
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore
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103
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Mechanotransduction and Cytoskeleton Remodeling Shaping YAP1 in Gastric Tumorigenesis. Int J Mol Sci 2019; 20:ijms20071576. [PMID: 30934860 PMCID: PMC6480114 DOI: 10.3390/ijms20071576] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 03/14/2019] [Accepted: 03/26/2019] [Indexed: 02/07/2023] Open
Abstract
The essential role of Hippo signaling pathway in cancer development has been elucidated by recent studies. In the gastrointestinal tissues, deregulation of the Hippo pathway is one of the most important driving events for tumorigenesis. It is widely known that Yes-associated protein 1 (YAP1) and WW domain that contain transcription regulator 1 (TAZ), two transcriptional co-activators with a PDZ-binding motif, function as critical effectors negatively regulated by the Hippo pathway. Previous studies indicate the involvement of YAP1/TAZ in mechanotransduction by crosstalking with the extracellular matrix (ECM) and the F-actin cytoskeleton associated signaling network. In gastric cancer (GC), YAP1/TAZ functions as an oncogene and transcriptionally promotes tumor formation by cooperating with TEAD transcription factors. Apart from the classic role of Hippo-YAP1 cascade, in this review, we summarize the current investigations to highlight the prominent role of YAP1/TAZ as a mechanical sensor and responder under mechanical stress and address its potential prognostic and therapeutic value in GC.
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104
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Nguyen CDK, Yi C. YAP/TAZ Signaling and Resistance to Cancer Therapy. Trends Cancer 2019; 5:283-296. [PMID: 31174841 DOI: 10.1016/j.trecan.2019.02.010] [Citation(s) in RCA: 202] [Impact Index Per Article: 40.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 12/31/2018] [Accepted: 02/15/2019] [Indexed: 12/23/2022]
Abstract
Drug resistance is a major challenge in cancer treatment. Emerging evidence indicates that deregulation of YAP/TAZ signaling may be a major mechanism of intrinsic and acquired resistance to various targeted and chemotherapies. Moreover, YAP/TAZ-mediated expression of PD-L1 and multiple cytokines is pivotal for tumor immune evasion. While direct inhibitors of YAP/TAZ are still under development, FDA-approved drugs that indirectly block YAP/TAZ activation or critical downstream targets of YAP/TAZ have shown promise in the clinic in reducing therapy resistance. Finally, BET inhibitors, which reportedly block YAP/TAZ-mediated transcription, present another potential venue to overcome YAP/TAZ-induced drug resistance.
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Affiliation(s)
- Chan D K Nguyen
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA
| | - Chunling Yi
- Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA.
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105
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Feng X, Arang N, Rigiracciolo DC, Lee JS, Yeerna H, Wang Z, Lubrano S, Kishore A, Pachter JA, König GM, Maggiolini M, Kostenis E, Schlaepfer DD, Tamayo P, Chen Q, Ruppin E, Gutkind JS. A Platform of Synthetic Lethal Gene Interaction Networks Reveals that the GNAQ Uveal Melanoma Oncogene Controls the Hippo Pathway through FAK. Cancer Cell 2019; 35:457-472.e5. [PMID: 30773340 PMCID: PMC6737937 DOI: 10.1016/j.ccell.2019.01.009] [Citation(s) in RCA: 152] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 12/03/2018] [Accepted: 01/15/2019] [Indexed: 02/05/2023]
Abstract
Activating mutations in GNAQ/GNA11, encoding Gαq G proteins, are initiating oncogenic events in uveal melanoma (UM). However, there are no effective therapies for UM. Using an integrated bioinformatics pipeline, we found that PTK2, encoding focal adhesion kinase (FAK), represents a candidate synthetic lethal gene with GNAQ activation. We show that Gαq activates FAK through TRIO-RhoA non-canonical Gαq-signaling, and genetic ablation or pharmacological inhibition of FAK inhibits UM growth. Analysis of the FAK-regulated transcriptome demonstrated that GNAQ stimulates YAP through FAK. Dissection of the underlying mechanism revealed that FAK regulates YAP by tyrosine phosphorylation of MOB1, inhibiting core Hippo signaling. Our findings establish FAK as a potential therapeutic target for UM and other Gαq-driven pathophysiologies that involve unrestrained YAP function.
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Affiliation(s)
- Xiaodong Feng
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA; State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Nadia Arang
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA; Biomedical Sciences Graduate Program, University of California, San Diego, La Jolla, CA 92093, USA
| | - Damiano Cosimo Rigiracciolo
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA; Department of Pharmacy and Health and Nutritional Sciences, University of Calabria, Rende 87036, Italy
| | - Joo Sang Lee
- Cancer Data Science Laboratory, National Cancer Institute, National Institute of Health, Bethesda, MD 20892, USA; Center for Bioinformatics and Computational Biology & Department of Computer Sciences, University of Maryland, College Park, MD 20742, USA.
| | - Huwate Yeerna
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
| | - Zhiyong Wang
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA; Biomedical Sciences Graduate Program, University of California, San Diego, La Jolla, CA 92093, USA
| | - Simone Lubrano
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
| | - Ayush Kishore
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
| | | | - Gabriele M König
- Molecular, Cellular and Pharmacobiology Section, Institute of Pharmaceutical Biology, University of Bonn, Bonn 53115, Germany
| | - Marcello Maggiolini
- Department of Pharmacy and Health and Nutritional Sciences, University of Calabria, Rende 87036, Italy
| | - Evi Kostenis
- Molecular, Cellular and Pharmacobiology Section, Institute of Pharmaceutical Biology, University of Bonn, Bonn 53115, Germany
| | - David D Schlaepfer
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
| | - Pablo Tamayo
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA; Division of Medical Genetics, UC San Diego School of Medicine, La Jolla, CA 92093, USA
| | - Qianming Chen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
| | - Eytan Ruppin
- Cancer Data Science Laboratory, National Cancer Institute, National Institute of Health, Bethesda, MD 20892, USA; Center for Bioinformatics and Computational Biology & Department of Computer Sciences, University of Maryland, College Park, MD 20742, USA.
| | - J Silvio Gutkind
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA.
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106
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Abstract
The Hippo pathway utilizes a well-characterized Ser/Thr kinase cascade to control the downstream effectors, Yap and Taz. In addition, Yap/Taz and other Hippo pathway components are directly regulated by tyrosine kinases (TKs). The methodological strategies described here use the example of the c-Abl non-receptor TK and the Yap substrate to outline the steps used to identify and to validate tyrosine phosphorylation sites, including bioinformatic approaches, ectopic expression of proteins in transfected tissue culture cells, and mutagenesis of endogenous proteins by CRISPR-Cas9. These general strategies can be applied to investigate regulation of protein signaling moieties by tyrosine phosphorylation in the context of distinct TKs.
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Affiliation(s)
- Nina Reuven
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
| | - Matan Shanzer
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
| | - Yosef Shaul
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel.
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107
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Lamar JM, Xiao Y, Norton E, Jiang ZG, Gerhard GM, Kooner S, Warren JSA, Hynes RO. SRC tyrosine kinase activates the YAP/TAZ axis and thereby drives tumor growth and metastasis. J Biol Chem 2018; 294:2302-2317. [PMID: 30559289 PMCID: PMC6378979 DOI: 10.1074/jbc.ra118.004364] [Citation(s) in RCA: 111] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 11/27/2018] [Indexed: 01/02/2023] Open
Abstract
When properly employed, targeted therapies are effective cancer treatments. However, the development of such therapies requires the identification of targetable drivers of cancer development and metastasis. The expression and nuclear localization of the transcriptional coactivators Yes-associated protein (YAP) and transcriptional co-activator with PDZ-binding motif (TAZ) are increased in many human cancers, and experimental evidence indicates that aberrant YAP or TAZ activation drives tumor formation and metastasis. Although these findings make YAP and TAZ appealing therapeutic targets, both have important functions in adult tissues, so directly targeting them could cause adverse effects. The identification of pathways active in cancer cells and required for YAP/TAZ activity could provide a way to inhibit YAP and TAZ. Here, we show that SRC proto-oncogene, nonreceptor tyrosine kinase (SRC) is an important driver of YAP/TAZ activity in human breast cancer and melanoma cells. SRC activation increased YAP/TAZ activity and the expression of YAP/TAZ-regulated genes. In contrast, SRC inhibition or knockdown repressed both YAP/TAZ activity and the expression of YAP/TAZ-regulated genes. We also show that SRC increases the activity of YAP and TAZ by repressing large tumor suppressor homolog (LATS), and we identify the GTPase-activating protein GIT ArfGAP 1 (GIT1) as an SRC effector that regulates both YAP and TAZ. Importantly, we demonstrate that SRC-mediated YAP/TAZ activity promotes tumor growth and enhances metastasis and that SRC-dependent tumor progression depends, at least in part, on YAP and TAZ. Our findings suggest that therapies targeting SRC could help manage some YAP/TAZ-dependent cancers.
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Affiliation(s)
- John M Lamar
- From the Department of Molecular and Cellular Physiology, Albany Medical College, Albany, New York 12208 and .,the Koch Institute for Integrative Cancer Research
| | - Yuxuan Xiao
- From the Department of Molecular and Cellular Physiology, Albany Medical College, Albany, New York 12208 and
| | - Emily Norton
- From the Department of Molecular and Cellular Physiology, Albany Medical College, Albany, New York 12208 and
| | - Zhi-Gang Jiang
- the Koch Institute for Integrative Cancer Research.,Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Genevieve M Gerhard
- From the Department of Molecular and Cellular Physiology, Albany Medical College, Albany, New York 12208 and
| | - Simrin Kooner
- From the Department of Molecular and Cellular Physiology, Albany Medical College, Albany, New York 12208 and
| | - Janine S A Warren
- From the Department of Molecular and Cellular Physiology, Albany Medical College, Albany, New York 12208 and
| | - Richard O Hynes
- the Koch Institute for Integrative Cancer Research, .,Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139.,Department of Biology, and
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108
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Lay K, Yuan S, Gur-Cohen S, Miao Y, Han T, Naik S, Pasolli HA, Larsen SB, Fuchs E. Stem cells repurpose proliferation to contain a breach in their niche barrier. eLife 2018; 7:41661. [PMID: 30520726 PMCID: PMC6324878 DOI: 10.7554/elife.41661] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Accepted: 11/29/2018] [Indexed: 02/07/2023] Open
Abstract
Adult stem cells are responsible for life-long tissue maintenance. They reside in and interact with specialized tissue microenvironments (niches). Using murine hair follicle as a model, we show that when junctional perturbations in the niche disrupt barrier function, adjacent stem cells dramatically change their transcriptome independent of bacterial invasion and become capable of directly signaling to and recruiting immune cells. Additionally, these stem cells elevate cell cycle transcripts which reduce their quiescence threshold, enabling them to selectively proliferate within this microenvironment of immune distress cues. However, rather than mobilizing to fuel new tissue regeneration, these ectopically proliferative stem cells remain within their niche to contain the breach. Together, our findings expose a potential communication relay system that operates from the niche to the stem cells to the immune system and back. The repurposing of proliferation by these stem cells patch the breached barrier, stoke the immune response and restore niche integrity.
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Affiliation(s)
- Kenneth Lay
- Robin Neustein Laboratory of Mammalian Cell Biology and Development, Howard Hughes Medical Institute, The Rockefeller University, New York, United States
| | - Shaopeng Yuan
- Robin Neustein Laboratory of Mammalian Cell Biology and Development, Howard Hughes Medical Institute, The Rockefeller University, New York, United States
| | - Shiri Gur-Cohen
- Robin Neustein Laboratory of Mammalian Cell Biology and Development, Howard Hughes Medical Institute, The Rockefeller University, New York, United States
| | - Yuxuan Miao
- Robin Neustein Laboratory of Mammalian Cell Biology and Development, Howard Hughes Medical Institute, The Rockefeller University, New York, United States
| | - Tianxiao Han
- Robin Neustein Laboratory of Mammalian Cell Biology and Development, Howard Hughes Medical Institute, The Rockefeller University, New York, United States
| | - Shruti Naik
- Robin Neustein Laboratory of Mammalian Cell Biology and Development, Howard Hughes Medical Institute, The Rockefeller University, New York, United States
| | - H Amalia Pasolli
- Electron Microscopy Shared Resource, Howard Hughes Medical Institute, Janelia Research Campus, Virginia, United States
| | - Samantha B Larsen
- Robin Neustein Laboratory of Mammalian Cell Biology and Development, Howard Hughes Medical Institute, The Rockefeller University, New York, United States
| | - Elaine Fuchs
- Robin Neustein Laboratory of Mammalian Cell Biology and Development, Howard Hughes Medical Institute, The Rockefeller University, New York, United States
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109
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Abstract
Hippo signaling is an evolutionarily conserved network that has a central role in regulating cell proliferation and cell fate to control organ growth and regeneration. It promotes activation of the LATS kinases, which control gene expression by inhibiting the activity of the transcriptional coactivator proteins YAP and TAZ in mammals and Yorkie in Drosophila. Diverse upstream inputs, including both biochemical cues and biomechanical cues, regulate Hippo signaling and enable it to have a key role as a sensor of cells' physical environment and an integrator of growth control signals. Several components of this pathway localize to cell-cell junctions and contribute to regulation of Hippo signaling by cell polarity, cell contacts, and the cytoskeleton. Downregulation of Hippo signaling promotes uncontrolled cell proliferation, impairs differentiation, and is associated with cancer. We review the current understanding of Hippo signaling and highlight progress in the elucidation of its regulatory mechanisms and biological functions.
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Affiliation(s)
- Jyoti R Misra
- Waksman Institute and Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, New Jersey 08854, USA;
| | - Kenneth D Irvine
- Waksman Institute and Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, New Jersey 08854, USA;
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110
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Elbediwy A, Vanyai H, Diaz-de-la-Loza MDC, Frith D, Snijders AP, Thompson BJ. Enigma proteins regulate YAP mechanotransduction. J Cell Sci 2018; 131:jcs.221788. [PMID: 30404826 PMCID: PMC6262774 DOI: 10.1242/jcs.221788] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 10/16/2018] [Indexed: 12/16/2022] Open
Abstract
Human cells can sense mechanical stress acting upon integrin adhesions and respond by sending the YAP (also known as YAP1) and TAZ (also known as WWTR1) transcriptional co-activators to the nucleus to drive TEAD-dependent transcription of target genes. How integrin signaling activates YAP remains unclear. Here, we show that integrin-mediated mechanotransduction requires the Enigma and Enigma-like proteins (PDLIM7 and PDLIM5, respectively; denoted for the family of PDZ and LIM domain-containing proteins). YAP binds to PDLIM5 and PDLIM7 (hereafter PDLIM5/7) via its C-terminal PDZ-binding motif (PBM), which is essential for full nuclear localization and activity of YAP. Accordingly, silencing of PDLIM5/7 expression reduces YAP nuclear localization, tyrosine phosphorylation and transcriptional activity. The PDLIM5/7 proteins are recruited from the cytoplasm to integrin adhesions and F-actin stress fibers in response to force by binding directly to the key stress fiber component α-actinin. Thus, forces acting on integrins recruit Enigma family proteins to trigger YAP activation during mechanotransduction.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Ahmed Elbediwy
- Epithelial Biology Laboratory, The Francis Crick Institute, 1 Midland Rd, London NW1 1AT, UK
| | - Hannah Vanyai
- Epithelial Biology Laboratory, The Francis Crick Institute, 1 Midland Rd, London NW1 1AT, UK
| | | | - David Frith
- Mass Spectrometry Science Technology Platform, The Francis Crick Institute, 1 Midland Rd, London NW1 1AT, UK
| | - Ambrosius P Snijders
- Mass Spectrometry Science Technology Platform, The Francis Crick Institute, 1 Midland Rd, London NW1 1AT, UK
| | - Barry J Thompson
- Epithelial Biology Laboratory, The Francis Crick Institute, 1 Midland Rd, London NW1 1AT, UK
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111
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Camacho Leal MDP, Costamagna A, Tassone B, Saoncella S, Simoni M, Natalini D, Dadone A, Sciortino M, Turco E, Defilippi P, Calautti E, Cabodi S. Conditional ablation of p130Cas/BCAR1 adaptor protein impairs epidermal homeostasis by altering cell adhesion and differentiation. Cell Commun Signal 2018; 16:73. [PMID: 30390666 PMCID: PMC6215608 DOI: 10.1186/s12964-018-0289-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 10/25/2018] [Indexed: 12/20/2022] Open
Abstract
Background p130 Crk-associated substrate (p130CAS; also known as BCAR1) is a scaffold protein that modulates many essential cellular processes such as cell adhesion, proliferation, survival, cell migration, and intracellular signaling. p130Cas has been shown to be highly expressed in a variety of human cancers of epithelial origin. However, few data are available regarding the role of p130Cas during normal epithelial development and homeostasis. Methods To this end, we have generated a genetically modified mouse in which p130Cas protein was specifically ablated in the epidermal tissue. Results By using this murine model, we show that p130Cas loss results in increased cell proliferation and reduction of cell adhesion to extracellular matrix. In addition, epidermal deletion of p130Cas protein leads to premature expression of “late” epidermal differentiation markers, altered membrane E-cadherin/catenin proteins localization and aberrant tyrosine phosphorylation of E-cadherin/catenin complexes. Interestingly, these alterations in adhesive properties in absence of p130Cas correlate with abnormalities in progenitor cells balance resulting in the amplification of a more committed cell population. Conclusion Altogether, these results provide evidence that p130Cas is an important regulator of epidermal cell fate and homeostasis. Electronic supplementary material The online version of this article (10.1186/s12964-018-0289-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Maria Del Pilar Camacho Leal
- Department of Biotechnology and Health Science, Molecular Biotechnology Center, Università di Torino, Via Nizza 52, Torino, Italy
| | - Andrea Costamagna
- Department of Biotechnology and Health Science, Molecular Biotechnology Center, Università di Torino, Via Nizza 52, Torino, Italy
| | - Beatrice Tassone
- Department of Biotechnology and Health Science, Molecular Biotechnology Center, Università di Torino, Via Nizza 52, Torino, Italy
| | - Stefania Saoncella
- Department of Biotechnology and Health Science, Molecular Biotechnology Center, Università di Torino, Via Nizza 52, Torino, Italy
| | - Matilde Simoni
- Department of Biotechnology and Health Science, Molecular Biotechnology Center, Università di Torino, Via Nizza 52, Torino, Italy
| | - Dora Natalini
- Department of Biotechnology and Health Science, Molecular Biotechnology Center, Università di Torino, Via Nizza 52, Torino, Italy
| | - Aurora Dadone
- Department of Biotechnology and Health Science, Molecular Biotechnology Center, Università di Torino, Via Nizza 52, Torino, Italy
| | - Marianna Sciortino
- Department of Biotechnology and Health Science, Molecular Biotechnology Center, Università di Torino, Via Nizza 52, Torino, Italy
| | - Emilia Turco
- Department of Biotechnology and Health Science, Molecular Biotechnology Center, Università di Torino, Via Nizza 52, Torino, Italy
| | - Paola Defilippi
- Department of Biotechnology and Health Science, Molecular Biotechnology Center, Università di Torino, Via Nizza 52, Torino, Italy
| | - Enzo Calautti
- Department of Biotechnology and Health Science, Molecular Biotechnology Center, Università di Torino, Via Nizza 52, Torino, Italy
| | - Sara Cabodi
- Department of Biotechnology and Health Science, Molecular Biotechnology Center, Università di Torino, Via Nizza 52, Torino, Italy.
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112
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Rübsam M, Broussard JA, Wickström SA, Nekrasova O, Green KJ, Niessen CM. Adherens Junctions and Desmosomes Coordinate Mechanics and Signaling to Orchestrate Tissue Morphogenesis and Function: An Evolutionary Perspective. Cold Spring Harb Perspect Biol 2018; 10:a029207. [PMID: 28893859 PMCID: PMC6211388 DOI: 10.1101/cshperspect.a029207] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Cadherin-based adherens junctions (AJs) and desmosomes are crucial to couple intercellular adhesion to the actin or intermediate filament cytoskeletons, respectively. As such, these intercellular junctions are essential to provide not only integrity to epithelia and other tissues but also the mechanical machinery necessary to execute complex morphogenetic and homeostatic intercellular rearrangements. Moreover, these spatially defined junctions serve as signaling hubs that integrate mechanical and chemical pathways to coordinate tissue architecture with behavior. This review takes an evolutionary perspective on how the emergence of these two essential intercellular junctions at key points during the evolution of multicellular animals afforded metazoans with new opportunities to integrate adhesion, cytoskeletal dynamics, and signaling. We discuss known literature on cross-talk between the two junctions and, using the skin epidermis as an example, provide a model for how these two junctions function in concert to orchestrate tissue organization and function.
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Affiliation(s)
- Matthias Rübsam
- University of Cologne, Department of Dermatology, Cologne Excellence Cluster on Stress Responses in Aging Associated Diseases (CECAD), Center for Molecular Medicine Cologne (CMMC) at the CECAD Research Center, 50931 Cologne, Germany
| | - Joshua A Broussard
- Northwestern University Feinberg School of Medicine, Departments of Pathology and Dermatology, the Robert H Lurie Comprehensive Cancer Center of Northwestern University, Chicago, Illinois 60611
| | - Sara A Wickström
- Paul Gerson Unna Group, Skin Homeostasis and Ageing, Max Planck Institute for Biology of Ageing, 50931 Cologne, Germany
| | - Oxana Nekrasova
- Northwestern University Feinberg School of Medicine, Departments of Pathology and Dermatology, the Robert H Lurie Comprehensive Cancer Center of Northwestern University, Chicago, Illinois 60611
| | - Kathleen J Green
- Northwestern University Feinberg School of Medicine, Departments of Pathology and Dermatology, the Robert H Lurie Comprehensive Cancer Center of Northwestern University, Chicago, Illinois 60611
| | - Carien M Niessen
- University of Cologne, Department of Dermatology, Cologne Excellence Cluster on Stress Responses in Aging Associated Diseases (CECAD), Center for Molecular Medicine Cologne (CMMC) at the CECAD Research Center, 50931 Cologne, Germany
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113
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Ideno N, Yamaguchi H, Ghosh B, Gupta S, Okumura T, Steffen DJ, Fisher CG, Wood LD, Singhi AD, Nakamura M, Gutkind JS, Maitra A. GNAS R201C Induces Pancreatic Cystic Neoplasms in Mice That Express Activated KRAS by Inhibiting YAP1 Signaling. Gastroenterology 2018; 155:1593-1607.e12. [PMID: 30142336 PMCID: PMC6219919 DOI: 10.1053/j.gastro.2018.08.006] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 07/16/2018] [Accepted: 08/01/2018] [Indexed: 12/14/2022]
Abstract
BACKGROUND & AIMS Mutations at hotspots in GNAS, which encodes stimulatory G-protein, α subunits, are detected in approximately 60% of intraductal papillary mucinous neoplasms (IPMNs) of the pancreas. We generated mice with KRAS-induced IPMNs that also express a constitutively active form of GNAS in pancreas and studied tumor development. METHODS We generated p48-Cre; LSL-KrasG12D; Rosa26R-LSL-rtTA-TetO-GnasR201C mice (Kras;Gnas mice); pancreatic tissues of these mice express activated KRAS and also express a mutant form of GNAS (GNASR201C) upon doxycycline administration. Mice that were not given doxycycline were used as controls, and survival times were compared by Kaplan-Meier analysis. Pancreata were collected at different time points after doxycycline administration and analyzed by histology. Pancreatic ductal adenocarcinomas (PDACs) were isolated from mice and used to generate cell lines, which were analyzed by reverse transcription polymerase chain reaction, immunoblotting, immunohistochemistry, and colony formation and invasion assays. Full-length and mutant forms of yes-associated protein (YAP) were expressed in PDAC cells. IPMN specimens were obtained from 13 patients with IPMN undergoing surgery and analyzed by immunohistochemistry. RESULTS All Kras;Gnas mice developed pancreatic cystic lesions that resemble human IPMNs; the grade of epithelial dysplasia increased with time. None of the control mice developed cystic lesions. Approximately one third of Kras;Gnas mice developed PDACs at a median of 30 weeks after doxycycline administration, whereas 33% of control mice developed PDACs. Expression of GNASR201C did not accelerate the development of PDACs compared with control mice. However, the neoplasms observed in Kras;Gnas mice were more differentiated, and expressed more genes associated with ductal phenotypes, than in control mice. PDACs isolated from Kras;Gnas mice had activation of the Hippo pathway; in cells from these tumors, phosphorylated YAP1 was sequestered in the cytoplasm, and this was also observed in human IPMNs with GNAS mutations. Sequestration of YAP1 was not observed in PDAC cells from control mice. CONCLUSIONS In mice that express activated KRAS in the pancreas, we found expression of GNASR201C to cause development of more differentiated tumors, with gene expression pattern associated with the ductal phenotype. Expression of mutant GNAS caused phosphorylated YAP1 to be sequestered in the cytoplasm, altering tumor progression.
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Affiliation(s)
- Noboru Ideno
- Department of Translational Molecular Pathology, Sheikh Ahmed Center for Pancreatic Cancer Center, Houston, Texas.
| | - Hiroshi Yamaguchi
- Department of Translational Molecular Pathology, Houston, Texas 77030, USA,Sheikh Ahmed Center for Pancreatic Cancer Center, Houston, Texas 77030, USA
| | - Bidyut Ghosh
- Department of Translational Molecular Pathology, Houston, Texas 77030, USA,Sheikh Ahmed Center for Pancreatic Cancer Center, Houston, Texas 77030, USA
| | - Sonal Gupta
- Department of Translational Molecular Pathology, Houston, Texas 77030, USA,Sheikh Ahmed Center for Pancreatic Cancer Center, Houston, Texas 77030, USA
| | - Takashi Okumura
- Department of Translational Molecular Pathology, Houston, Texas 77030, USA,Sheikh Ahmed Center for Pancreatic Cancer Center, Houston, Texas 77030, USA
| | - Dana J Steffen
- Department of Pharmacology, University of California San Diego, La Jolla, California 92093, USA
| | - Catherine G Fisher
- Department of Pathology, Sol Goldman Pancreatic Cancer Research Center, Baltimore 21287, USA
| | - Laura D Wood
- Department of Pathology, Sol Goldman Pancreatic Cancer Research Center, Baltimore 21287, USA,Department of Oncology, Sol Goldman Pancreatic Cancer Research Center, Baltimore 21287, USA
| | - Aatur D. Singhi
- Department of Anatomic Pathology, University of Pittsburgh, Pittsburgh 15260, USA
| | - Masafumi Nakamura
- Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - J Silvio Gutkind
- Department of Pharmacology, University of California San Diego, La Jolla, California 92093, USA
| | - Anirban Maitra
- Department of Translational Molecular Pathology, Houston, Texas 77030, USA,Sheikh Ahmed Center for Pancreatic Cancer Center, Houston, Texas 77030, USA
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Chen C, Shenoy AK, Padia R, Fang D, Jing Q, Yang P, Su SB, Huang S. Suppression of lung cancer progression by isoliquiritigenin through its metabolite 2, 4, 2', 4'-Tetrahydroxychalcone. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2018; 37:243. [PMID: 30285892 PMCID: PMC6171243 DOI: 10.1186/s13046-018-0902-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 09/03/2018] [Indexed: 02/03/2023]
Abstract
Background Licorice is an herb extensively used for both culinary and medicinal purposes. Various constituents of licorice have been shown to exhibit anti-tumorigenic effect in diverse cancer types. However, majority of these studies focus on the aspect of their growth-suppressive role. In this study, we systematically analyzed known licorice’s constituents on the goal of identifying component(s) that can effectively suppress both cell migration and growth. Methods Effect of licorice’s constituents on cell growth was evaluated by MTT assay while cell migration was assessed by both wound-healing and Transwell assays. Cytoskeleton reorganization and focal adhesion assembly were visualized by immunofluorescence staining with labeled phalloidin and anti-paxillin antibody. Activity of Src in cells was judged by western blot using phosphor-Src416 antibody while Src kinase activity was measured using Promega Src kinase assay system. Anti-tumorigenic capabilities of isoliquiritigenin (ISL) and 2, 4, 2′, 4’-Tetrahydroxychalcone (THC) were investigated using lung cancer xenograft model. Results Using a panel of lung cancer cell lines, ISL was identified as the only licorice’s constituent capable of inhibiting both cell migration and growth. ISL-led inhibition in cell migration resulted from impaired cytoskeleton reorganization and focal adhesion assembly. Assessing the phosphorylation of 141 cytoskeleton dynamics-associated proteins revealed that ISL reduced the abundance of Tyr421-phosphorylation of cortactin, Tyr925- and Tyr861-phosphorylation of FAK, indicating the involvement of Src because these sites are known to be phosphorylated by Src. Enigmatically, ISL inhibited Src in cells while displayed no effect on Src activity in cell-free system. The discrepancy was explained by the observation that THC, one of the major ISL metabolite identified in lung cancer cells abrogated Src activity both in cells and cell-free system. Similar to ISL, THC deterred cell migration and abolished cytoskeleton reorganization/focal adhesion assembly. Furthermore, we showed both ISL and THC suppressed in vitro lung cancer cell invasion and in vivo tumor progression. Conclusion Our study suggests that ISL inhibits lung cancer cell migration and tumorigenesis by interfering with Src through its metabolite THC. As licorice is safely used for culinary purposes, our study suggests that ISL or THC may be safely used as a Src inhibitor. Electronic supplementary material The online version of this article (10.1186/s13046-018-0902-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Changliang Chen
- Research Center for Traditional Chinese Medicine Complexity System, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Anitha K Shenoy
- Department of Anatomy and Cell Biology, University of Florida College of Medicine, Gainesville, FL, 32610, USA.,Department of Pharmaceutics and Biomedical Sciences, California Health Sciences University, Clovis, CA, USA
| | - Ravi Padia
- Department of Anatomy and Cell Biology, University of Florida College of Medicine, Gainesville, FL, 32610, USA
| | - Dongdong Fang
- Research Center for Traditional Chinese Medicine Complexity System, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Qing Jing
- Department of Cardiology, Changhai Hospital, Shanghai, China
| | - Ping Yang
- Instrumental Analysis Center, School of Pharmacy, Fudan University, Shanghai, China
| | - Shi-Bing Su
- Research Center for Traditional Chinese Medicine Complexity System, Shanghai University of Traditional Chinese Medicine, Shanghai, China.
| | - Shuang Huang
- Research Center for Traditional Chinese Medicine Complexity System, Shanghai University of Traditional Chinese Medicine, Shanghai, China. .,Department of Anatomy and Cell Biology, University of Florida College of Medicine, Gainesville, FL, 32610, USA.
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116
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Vincent-Mistiaen Z, Elbediwy A, Vanyai H, Cotton J, Stamp G, Nye E, Spencer-Dene B, Thomas GJ, Mao J, Thompson B. YAP drives cutaneous squamous cell carcinoma formation and progression. eLife 2018; 7:e33304. [PMID: 30231971 PMCID: PMC6147738 DOI: 10.7554/elife.33304] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 06/29/2018] [Indexed: 01/14/2023] Open
Abstract
Squamous cell carcinoma (SCC) can progress to malignant metastatic cancer, including an aggressive subtype known as spindle cell carcinoma (spSCC). spSCC formation involves epithelial-to-mesenchymal transition (EMT), yet the molecular basis of this event remains unknown. The transcriptional co-activator YAP undergoes recurrent amplification in human SCC and overexpression of YAP drives SCC formation in mice. Here, we show that human spSCC tumours also feature strong nuclear localisation of YAP and overexpression of activated YAP (NLS-YAP-5SA) with Keratin-5 (K5-CreERt) is sufficient to induce rapid formation of both SCC and spSCC in mice. spSCC tumours arise at sites of epithelial scratch wounding, where tumour-initiating epithelial cells undergo EMT to generate spSCC. Expression of the EMT transcription factor ZEB1 arises upon wounding and is a defining characteristic of spSCC in mice and humans. Thus, the wound healing response synergises with YAP to drive metaplastic transformation of SCC to spSCC.
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Affiliation(s)
| | | | | | - Jennifer Cotton
- University of Massachusetts Medical SchoolWorcesterUnited States
| | | | - Emma Nye
- The Francis Crick InstituteLondonUnited Kingdom
| | | | - Gareth J Thomas
- Cancer Sciences Unit, Faculty of MedicineUniversity of SouthamptonSouthamptonUnited Kingdom
| | - Junhao Mao
- University of Massachusetts Medical SchoolWorcesterUnited States
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117
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Mechanoregulation and pathology of YAP/TAZ via Hippo and non-Hippo mechanisms. Clin Transl Med 2018; 7:23. [PMID: 30101371 PMCID: PMC6087706 DOI: 10.1186/s40169-018-0202-9] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Accepted: 07/06/2018] [Indexed: 01/01/2023] Open
Abstract
Yes-associated protein (YAP) and its paralog WW domain containing transcription regulator 1 (TAZ) are important regulators of multiple cellular functions such as proliferation, differentiation, and survival. On the tissue level, YAP/TAZ are essential for embryonic development, organ size control and regeneration, while their deregulation leads to carcinogenesis or other diseases. As an underlying principle for YAP/TAZ-mediated regulation of biological functions, a growing body of research reveals that YAP/TAZ play a central role in delivering information of mechanical environments surrounding cells to the nucleus transcriptional machinery. In this review, we discuss mechanical cue-dependent regulatory mechanisms for YAP/TAZ functions, as well as their clinical significance in cancer progression and treatment.
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118
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Dasatinib sensitises KRAS -mutant cancer cells to mitogen-activated protein kinase kinase inhibitor via inhibition of TAZ activity. Eur J Cancer 2018; 99:37-48. [DOI: 10.1016/j.ejca.2018.05.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 05/08/2018] [Accepted: 05/10/2018] [Indexed: 12/30/2022]
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119
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YAP/TAZ upstream signals and downstream responses. Nat Cell Biol 2018; 20:888-899. [PMID: 30050119 DOI: 10.1038/s41556-018-0142-z] [Citation(s) in RCA: 574] [Impact Index Per Article: 95.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 06/14/2018] [Indexed: 02/06/2023]
Abstract
Cell behaviour is strongly influenced by physical, mechanical contacts between cells and their extracellular matrix. We review how the transcriptional regulators YAP and TAZ integrate mechanical cues with the response to soluble signals and metabolic pathways to control multiple aspects of cell behaviour, including proliferation, cell plasticity and stemness essential for tissue regeneration. Corruption of cell-environment interplay leads to aberrant YAP and TAZ activation that is instrumental for multiple diseases, including cancer.
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120
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Ege N, Dowbaj AM, Jiang M, Howell M, Hooper S, Foster C, Jenkins RP, Sahai E. Quantitative Analysis Reveals that Actin and Src-Family Kinases Regulate Nuclear YAP1 and Its Export. Cell Syst 2018; 6:692-708.e13. [PMID: 29909276 PMCID: PMC6035388 DOI: 10.1016/j.cels.2018.05.006] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 02/08/2018] [Accepted: 05/08/2018] [Indexed: 12/12/2022]
Abstract
The transcriptional regulator YAP1 is critical for the pathological activation of fibroblasts. In normal fibroblasts, YAP1 is located in the cytoplasm, while in activated cancer-associated fibroblasts, it is nuclear and promotes the expression of genes required for pro-tumorigenic functions. Here, we investigate the dynamics of YAP1 shuttling in normal and activated fibroblasts, using EYFP-YAP1, quantitative photobleaching methods, and mathematical modeling. Imaging of migrating fibroblasts reveals the tight temporal coupling of cell shape change and altered YAP1 localization. Both 14-3-3 and TEAD binding modulate YAP1 shuttling, but neither affects nuclear import. Instead, we find that YAP1 nuclear accumulation in activated fibroblasts results from Src and actomyosin-dependent suppression of phosphorylated YAP1 export. Finally, we show that nuclear-constrained YAP1, upon XPO1 depletion, remains sensitive to blockade of actomyosin function. Together, these data place nuclear export at the center of YAP1 regulation and indicate that the cytoskeleton can regulate YAP1 within the nucleus.
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Affiliation(s)
- Nil Ege
- Tumour Cell Biology Laboratory, The Francis Crick Institute, London NW1 1AT, UK; Cell and Developmental Biology Department, University College London, London WC1E 6BT, UK
| | - Anna M Dowbaj
- Tumour Cell Biology Laboratory, The Francis Crick Institute, London NW1 1AT, UK
| | - Ming Jiang
- High Throughput Screening, The Francis Crick Institute, London NW1 1AT, UK
| | - Michael Howell
- High Throughput Screening, The Francis Crick Institute, London NW1 1AT, UK
| | - Steven Hooper
- Tumour Cell Biology Laboratory, The Francis Crick Institute, London NW1 1AT, UK
| | - Charles Foster
- Transcription Laboratory, The Francis Crick Institute, London NW1 1AT, UK
| | - Robert P Jenkins
- Tumour Cell Biology Laboratory, The Francis Crick Institute, London NW1 1AT, UK.
| | - Erik Sahai
- Tumour Cell Biology Laboratory, The Francis Crick Institute, London NW1 1AT, UK.
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121
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Sugihara T, Werneburg NW, Hernandez MC, Yang L, Kabashima A, Hirsova P, Yohanathan L, Sosa C, Truty MJ, Vasmatzis G, Gores GJ, Smoot RL. YAP Tyrosine Phosphorylation and Nuclear Localization in Cholangiocarcinoma Cells Are Regulated by LCK and Independent of LATS Activity. Mol Cancer Res 2018; 16:1556-1567. [PMID: 29903769 DOI: 10.1158/1541-7786.mcr-18-0158] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 04/18/2018] [Accepted: 05/30/2018] [Indexed: 12/28/2022]
Abstract
The Hippo pathway effector, Yes-associated protein (YAP), is a transcriptional coactivator implicated in cholangiocarcinoma (CCA) pathogenesis. YAP is known to be regulated by a serine/threonine kinase relay module (MST1/2-LATS1/2) culminating in phosphorylation of YAP at Serine 127 and cytoplasmic sequestration. However, YAP also undergoes tyrosine phosphorylation, and the role of tyrosine phosphorylation in YAP regulation remains unclear. Herein, YAP regulation by tyrosine phosphorylation was examined in human and mouse CCA cells, as well as patient-derived xenograft (PDX) models. YAP was phosphorylated on tyrosine 357 (Y357) in CCA cell lines and PDX models. SRC family kinase (SFK) inhibition with dasatinib resulted in loss of YAPY357 phosphorylation, promoted its translocation from the nucleus to the cytoplasm, and reduced YAP target gene expression, including cell lines expressing a LATS1/2-resistant YAP mutant in which all serine residues were mutated to alanine. Consistent with these observations, precluding YAPY357 phosphorylation by site-directed mutagenesis (YAPY357F) excluded YAP from the nucleus. Targeted siRNA experiments identified LCK as the SFK that most potently mediated YAPY357 phosphorylation. Likewise, inducible CRISPR/Cas9-targeted LCK deletion decreased YAPY357 phosphorylation and its nuclear localization. The importance of LCK in CCA biology was demonstrated by clinical observations suggesting LCK expression levels were associated with early tumor recurrence following resection of CCA. Finally, dasatinib displayed therapeutic efficacy in PDX models. Mol Cancer Res; 16(10); 1556-67. ©2018 AACR.
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Affiliation(s)
- Takaaki Sugihara
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
| | - Nathan W Werneburg
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
| | - Matthew C Hernandez
- Department of Surgery, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
| | - Lin Yang
- Center for Individualized Medicine, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
| | - Ayano Kabashima
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
| | - Petra Hirsova
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Science, Rochester, Minnesota.,Institute of Clinical Biochemistry and Diagnostics, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
| | - Lavanya Yohanathan
- Department of Surgery, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
| | - Carlos Sosa
- Division of Health Sciences Research, Biomedical Statistics and Informatics, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
| | - Mark J Truty
- Department of Surgery, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
| | - George Vasmatzis
- Department of Laboratory Medicine and Pathology, Molecular Medicine, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
| | - Gregory J Gores
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
| | - Rory L Smoot
- Department of Surgery, Mayo Clinic College of Medicine and Science, Rochester, Minnesota.
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Xiang L, Yu H, Zhang X, Wang B, Yuan Y, Zhang Q, Ye R, Gong P, Wu Y. The versatile hippo pathway in oral-maxillofacial development and bone remodeling. Dev Biol 2018; 440:53-63. [PMID: 29792855 DOI: 10.1016/j.ydbio.2018.05.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 05/20/2018] [Accepted: 05/20/2018] [Indexed: 02/05/2023]
Abstract
The Hippo signaling pathway is implicated in key aspects of cell proliferation, control of organ size, stem cell functions and tumor suppression. Its functions are primarily mediated either through direct effects on transcription factors to influence target gene expression or through crosstalk with other signaling pathways that regulate multiple physiological activities. Studies are revealing Hippo pathway involvement in diverse functions including renewal of intestinal epithelium, promotion of myocardial cell proliferation, cancer suppression, etc. In this review we discuss Hippo pathway signaling in oral-maxillofacial development and bone remodeling under normal and pathological conditions and highlight promising future research directions.
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Affiliation(s)
- Lin Xiang
- State Key Laboratory of Oral Diseases&National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Hui Yu
- State Key Laboratory of Oral Diseases&National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xinyuan Zhang
- State Key Laboratory of Oral Diseases&National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Bin Wang
- State Key Laboratory of Oral Diseases&National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ying Yuan
- State Key Laboratory of Oral Diseases&National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Qin Zhang
- State Key Laboratory of Oral Diseases&National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Rui Ye
- State Key Laboratory of Oral Diseases&National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ping Gong
- State Key Laboratory of Oral Diseases&National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
| | - Yingying Wu
- State Key Laboratory of Oral Diseases&National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
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Abstract
E-cadherin is a key component of the adherens junctions that are integral in cell adhesion and maintaining epithelial phenotype of cells. Homophilic E-cadherin binding between cells is important in mediating contact inhibition of proliferation when cells reach confluence. Loss of E-cadherin expression results in loss of contact inhibition and is associated with increased cell motility and advanced stages of cancer. In this review we discuss the role of E-cadherin and its downstream signaling in regulation of contact inhibition and the development and progression of cancer.
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124
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Yosefzon Y, Soteriou D, Feldman A, Kostic L, Koren E, Brown S, Ankawa R, Sedov E, Glaser F, Fuchs Y. Caspase-3 Regulates YAP-Dependent Cell Proliferation and Organ Size. Mol Cell 2018; 70:573-587.e4. [DOI: 10.1016/j.molcel.2018.04.019] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 03/20/2018] [Accepted: 04/19/2018] [Indexed: 12/17/2022]
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125
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Abstract
The Hippo signal transduction pathway is an important regulator of organ growth and cell differentiation, and its deregulation contributes to the development of cancer. The activity of the Hippo pathway is strongly dependent on cell junctions, cellular architecture, and the mechanical properties of the microenvironment. In this review, we discuss recent advances in our understanding of how cell junctions transduce signals from the microenvironment and control the activity of the Hippo pathway. We also discuss how these mechanisms may control organ growth during development and regeneration, and how defects in them deregulate Hippo signaling in cancer cells.
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Affiliation(s)
- Ruchan Karaman
- VIB Center for Cancer Biology, University of Leuven, 3000 Leuven, Belgium.,Department of Oncology, University of Leuven, 3000 Leuven, Belgium
| | - Georg Halder
- VIB Center for Cancer Biology, University of Leuven, 3000 Leuven, Belgium.,Department of Oncology, University of Leuven, 3000 Leuven, Belgium
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Warren JSA, Xiao Y, Lamar JM. YAP/TAZ Activation as a Target for Treating Metastatic Cancer. Cancers (Basel) 2018; 10:cancers10040115. [PMID: 29642615 PMCID: PMC5923370 DOI: 10.3390/cancers10040115] [Citation(s) in RCA: 108] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 04/01/2018] [Accepted: 04/03/2018] [Indexed: 12/20/2022] Open
Abstract
Yes-Associated Protein (YAP) and Transcriptional Co-activator with PDZ-binding Motif (TAZ) have both emerged as important drivers of cancer progression and metastasis. YAP and TAZ are often upregulated or nuclear localized in aggressive human cancers. There is abundant experimental evidence demonstrating that YAP or TAZ activation promotes cancer formation, tumor progression, and metastasis. In this review we summarize the evidence linking YAP/TAZ activation to metastasis, and discuss the roles of YAP and TAZ during each step of the metastatic cascade. Collectively, this evidence strongly suggests that inappropriate YAP or TAZ activity plays a causal role in cancer, and that targeting aberrant YAP/TAZ activation is a promising strategy for the treatment of metastatic disease. To this end, we also discuss several potential strategies for inhibiting YAP/TAZ activation in cancer and the challenges each strategy poses.
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Affiliation(s)
- Janine S A Warren
- Department of Molecular and Cellular Physiology, Albany Medical College, Albany, NY 12208, USA.
| | - Yuxuan Xiao
- Department of Molecular and Cellular Physiology, Albany Medical College, Albany, NY 12208, USA.
| | - John M Lamar
- Department of Molecular and Cellular Physiology, Albany Medical College, Albany, NY 12208, USA.
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127
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Fulford A, Tapon N, Ribeiro PS. Upstairs, downstairs: spatial regulation of Hippo signalling. Curr Opin Cell Biol 2018; 51:22-32. [PMID: 29154163 DOI: 10.1016/j.ceb.2017.10.006] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 10/13/2017] [Indexed: 12/31/2022]
Abstract
Cellular signalling lies at the heart of every decision involved in the development and homeostasis of multicellular organisms. The Hippo pathway was discovered nearly two decades ago through seminal work in Drosophila and rapidly emerged as a crucial signalling network implicated in developmental and oncogenic growth, tissue regeneration and stem cell biology. Here, we review recent advances in the field relating to the upstream regulation of Hippo signalling and the intracellular tug-of-war that tightly controls its main target, the transcriptional co-activator Yorkie/YAP.
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Affiliation(s)
- Alexander Fulford
- Centre for Tumour Biology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK
| | - Nicolas Tapon
- The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK.
| | - Paulo S Ribeiro
- Centre for Tumour Biology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK.
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128
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Chen H, Xu Z, Li X, Yang Y, Li B, Li Y, Xia K, Wang J, Li S, Wang M, Wu H. α-catenin SUMOylation increases IκBα stability and inhibits breast cancer progression. Oncogenesis 2018. [PMID: 29540699 PMCID: PMC5852976 DOI: 10.1038/s41389-018-0037-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
α-catenin has been demonstrated to suppress several different types of cancers. Here we demonstrate that α-catenin is modified by SUMO protein, which covalently binds α-catenin at the carboxy terminus at lysine 870. Substitution of lysine 870 with arginine completely abolishes α-catenin SUMOylation. This modification can be removed by SENP1. However, α-catenin SUMOylation does not affect its stability and subcellular localization. In addition, we observed that the SUMOylation-deficient α-catenin mutant has a reduced interaction with IκBα which prevents subsequent ubiquitination of IκBα, and therefore a reduced suppression of expression of the NF-κB target genes TNF-α, IL-8, VEGF, and uPA. In addition, the α-catenin SUMOylation mutant shows impaired suppression of tumor growth. These results demonstrate that SUMOylation at lysine 870 of α-catenin plays a key role in the suppression of the NF-κB pathway, which inhibits breast cancer tumor growth and migration.
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Affiliation(s)
- Huan Chen
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, China
| | - Zhaowei Xu
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, China
| | - Xiahui Li
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, China
| | - Yangyang Yang
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, China
| | - Bowen Li
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, China
| | - Yanan Li
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, China
| | - Kangkai Xia
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, China
| | - Jian Wang
- School of Life Science and Medicine, Dalian University of Technology, Panjin, China
| | - Shujing Li
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, China
| | - Miao Wang
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, China.
| | - Huijian Wu
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, China. .,School of Life Science and Medicine, Dalian University of Technology, Panjin, China.
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129
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Fletcher GC, Diaz-de-la-Loza MDC, Borreguero-Muñoz N, Holder M, Aguilar-Aragon M, Thompson BJ. Mechanical strain regulates the Hippo pathway in Drosophila. Development 2018; 145:dev159467. [PMID: 29440303 PMCID: PMC5868995 DOI: 10.1242/dev.159467] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 01/29/2018] [Indexed: 12/30/2022]
Abstract
Animal cells are thought to sense mechanical forces via the transcriptional co-activators YAP (or YAP1) and TAZ (or WWTR1), the sole Drosophila homolog of which is named Yorkie (Yki). In mammalian cells in culture, artificial mechanical forces induce nuclear translocation of YAP and TAZ. Here, we show that physiological mechanical strain can also drive nuclear localisation of Yki and activation of Yki target genes in the Drosophila follicular epithelium. Mechanical strain activates Yki by stretching the apical domain, reducing the concentration of apical Crumbs, Expanded, Kibra and Merlin, and reducing apical Hippo kinase dimerisation. Overexpressing Hippo kinase to induce ectopic activation in the cytoplasm is sufficient to prevent Yki nuclear localisation even in flattened follicle cells. Conversely, blocking Hippo signalling in warts clones causes Yki nuclear localisation even in columnar follicle cells. We find no evidence for involvement of other pathways, such as Src42A kinase, in regulation of Yki. Finally, our results in follicle cells appear generally applicable to other tissues, as nuclear translocation of Yki is also readily detectable in other flattened epithelial cells such as the peripodial epithelium of the wing imaginal disc, where it promotes cell flattening.
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Affiliation(s)
- Georgina C Fletcher
- Epithelial Biology Laboratory, The Francis Crick Institute, London NW1 1AT, UK
| | | | | | - Maxine Holder
- Apoptosis and Proliferation Control Laboratory, The Francis Crick Institute, London NW1 1AT, UK
| | | | - Barry J Thompson
- Epithelial Biology Laboratory, The Francis Crick Institute, London NW1 1AT, UK
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130
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Ibar C, Kirichenko E, Keepers B, Enners E, Fleisch K, Irvine KD. Tension-dependent regulation of mammalian Hippo signaling through LIMD1. J Cell Sci 2018; 131:jcs214700. [PMID: 29440237 PMCID: PMC5897721 DOI: 10.1242/jcs.214700] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 01/31/2018] [Indexed: 12/26/2022] Open
Abstract
Hippo signaling is regulated by biochemical and biomechanical cues that influence the cytoskeleton, but the mechanisms that mediate this have remained unclear. We show that all three mammalian Ajuba family proteins - AJUBA, LIMD1 and WTIP - exhibit tension-dependent localization to adherens junctions, and that both LATS family proteins, LATS1 and LATS2, exhibit an overlapping tension-dependent junctional localization. This localization of Ajuba and LATS family proteins is also influenced by cell density, and by Rho activation. We establish that junctional localization of LATS kinases requires LIMD1, and that LIMD1 is also specifically required for the regulation of LATS kinases and YAP1 by Rho. Our results identify a biomechanical pathway that contributes to regulation of mammalian Hippo signaling, establish that this occurs through tension-dependent LIMD1-mediated recruitment and inhibition of LATS kinases in junctional complexes, and identify roles for this pathway in both Rho-mediated and density-dependent regulation of Hippo signaling.
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Affiliation(s)
- Consuelo Ibar
- Waksman Institute and Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway NJ 08854, USA
| | - Elmira Kirichenko
- Waksman Institute and Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway NJ 08854, USA
| | - Benjamin Keepers
- Waksman Institute and Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway NJ 08854, USA
| | - Edward Enners
- Waksman Institute and Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway NJ 08854, USA
| | - Katelyn Fleisch
- Waksman Institute and Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway NJ 08854, USA
| | - Kenneth D Irvine
- Waksman Institute and Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway NJ 08854, USA
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131
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Elbediwy A, Thompson BJ. Evolution of mechanotransduction via YAP/TAZ in animal epithelia. Curr Opin Cell Biol 2018; 51:117-123. [PMID: 29477107 DOI: 10.1016/j.ceb.2018.02.003] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 02/07/2018] [Accepted: 02/07/2018] [Indexed: 10/18/2022]
Abstract
Mechanical stretch forces can control the growth of epithelial tissues such as mammalian skin, whose surface area is precisely coordinated with body size. In skin keratinocytes cultured in vitro, mechanical forces acting via Integrin adhesions and the actin cytoskeleton have been shown to induce nuclear translocation of YAP/TAZ co-activators to induce cell proliferation. Furthermore, conditional knockouts of both YAP (also called YAP1) and TAZ (also called WWTR1) in mouse skin resemble the phenotype of skin-specific loss of Integrin beta1 (ITGB1), indicating that this signalling mechanism is important in vivo. Curiously, Integrins are dispensable in Drosophila to activate the sole YAP/TAZ homolog Yorkie (Yki), which has lost the C-terminal PDZ-binding motif needed to promote nuclear localization of YAP/TAZ in mammalian cells. Differences in the structure of the epidermis between deuterostomes (e.g.: stratified squamous skin of mammals) and protostomes (e.g.: monolayered columnar epidermis of Drosophila) may explain this evolutionary divergence. Monolayered columnar epithelia feature a well-differentiated apical membrane domain, where proteins such as Crumbs, Expanded, Merlin and Kibra activate the Hippo pathway to repress Drosophila Yki. Stratified squamous epithelia lack an apical domain and thus depend primarily on basal Integrin adhesions to activate YAP/TAZ in basal layer stem cells via multiple postulated signalling mechanisms. Finally, YAP and TAZ retain the ability to sense the apical domain in the columnar epithelial cells lining internal organs such as the lung bronchus, where YAP/TAZ localize to the nucleus in proliferating basal layer stem cells but translocate to the cytoplasm in differentiated columnar cells.
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Affiliation(s)
- Ahmed Elbediwy
- Epithelial Biology Laboratory, The Francis Crick Institute, 1 Midland Rd, London NW1 1AT, United Kingdom
| | - Barry J Thompson
- Epithelial Biology Laboratory, The Francis Crick Institute, 1 Midland Rd, London NW1 1AT, United Kingdom.
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132
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Short SP, Kondo J, Smalley-Freed WG, Takeda H, Dohn MR, Powell AE, Carnahan RH, Washington MK, Tripathi M, Payne DM, Jenkins NA, Copeland NG, Coffey RJ, Reynolds AB. p120-Catenin is an obligate haploinsufficient tumor suppressor in intestinal neoplasia. J Clin Invest 2017; 127:4462-4476. [PMID: 29130932 PMCID: PMC5707165 DOI: 10.1172/jci77217] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 10/03/2017] [Indexed: 11/17/2022] Open
Abstract
p120-Catenin (p120) functions as a tumor suppressor in intestinal cancer, but the mechanism is unclear. Here, using conditional p120 knockout in Apc-sensitized mouse models of intestinal cancer, we have identified p120 as an "obligatory" haploinsufficient tumor suppressor. Whereas monoallelic loss of p120 was associated with a significant increase in tumor multiplicity, loss of both alleles was never observed in tumors from these mice. Moreover, forced ablation of the second allele did not further enhance tumorigenesis, but instead induced synthetic lethality in combination with Apc loss of heterozygosity. In tumor-derived organoid cultures, elimination of both p120 alleles resulted in caspase-3-dependent apoptosis that was blocked by inhibition of Rho kinase (ROCK). With ROCK inhibition, however, p120-ablated organoids exhibited a branching phenotype and a substantial increase in cell proliferation. Access to data from Sleeping Beauty mutagenesis screens afforded an opportunity to directly assess the tumorigenic impact of p120 haploinsufficiency relative to other candidate drivers. Remarkably, p120 ranked third among the 919 drivers identified. Cofactors α-catenin and epithelial cadherin (E-cadherin) were also among the highest scoring candidates, indicating a mechanism at the level of the intact complex that may play an important role at very early stages of of intestinal tumorigenesis while simultaneously restricting outright loss via synthetic lethality.
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Affiliation(s)
| | - Jumpei Kondo
- Department of Medicine, Vanderbilt University Medical School, Nashville, Tennessee, USA
| | | | - Haruna Takeda
- Division of Genetics and Genomics, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore
- Department of Oncologic Pathology, Kanazawa Medical University, Uchinada, Ishikawa, Japan
| | - Michael R. Dohn
- Department of Cancer Biology, and
- Department of Pharmacology, Vanderbilt University, Nashville, Tennessee, USA
| | - Anne E. Powell
- Department of Medicine, Vanderbilt University Medical School, Nashville, Tennessee, USA
| | | | - Mary K. Washington
- Department of Pathology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | | | - D. Michael Payne
- CU Systems Biology Center, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Nancy A. Jenkins
- Division of Genetics and Genomics, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore
- Cancer Research Program, The Methodist Hospital Research Institute, Houston, Texas, USA
| | - Neal G. Copeland
- Division of Genetics and Genomics, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore
- Cancer Research Program, The Methodist Hospital Research Institute, Houston, Texas, USA
| | - Robert J. Coffey
- Department of Medicine, Vanderbilt University Medical School, Nashville, Tennessee, USA
- Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, USA
- Veterans Affairs Medical Center, Tennessee Valley Healthcare System, Nashville, Tennessee, USA
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133
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Abstract
In his classic book On Growth and Form, D'Arcy Thompson discussed the necessity of a physical and mathematical approach to understanding the relationship between growth and form. The past century has seen extraordinary advances in our understanding of biological components and processes contributing to organismal morphogenesis, but the mathematical and physical principles involved have not received comparable attention. The most obvious entry of physics into morphogenesis is via tissue mechanics. In this Review, we discuss the fundamental role of mechanical interactions between cells induced by growth in shaping a tissue. Non-uniform growth can lead to accumulation of mechanical stress, which in the context of two-dimensional sheets of tissue can specify the shape it assumes in three dimensions. A special class of growth patterns - conformal growth - does not lead to the accumulation of stress and can generate a rich variety of planar tissue shapes. Conversely, mechanical stress can provide a regulatory feedback signal into the growth control circuit. Both theory and experiment support a key role for mechanical interactions in shaping tissues and, via mechanical feedback, controlling epithelial growth.
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Affiliation(s)
- Kenneth D Irvine
- Waksman Institute and Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway NJ 08854, USA
| | - Boris I Shraiman
- Department of Physics, Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93101, USA
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134
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Hicks-Berthet J, Varelas X. Integrin-FAK-CDC42-PP1A signaling gnaws at YAP/TAZ activity to control incisor stem cells. Bioessays 2017; 39. [PMID: 28891248 DOI: 10.1002/bies.201700116] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
How epithelial tissues are able to self-renew to maintain homeostasis and regenerate in response to injury remains a persistent question. The transcriptional effectors YAP and TAZ are increasingly being recognized as central mediators of epithelial stem cell biology, and a wealth of recent studies have been directed at understanding the control and activity of these factors. Recent work by Hu et al. has added to this knowledge, as they identify an Integrin-FAK-CDC42-PP1A signaling cascade that directs nuclear YAP/TAZ activity in stem cell populations of the mouse incisor, and define convergence on mTORC1 signaling as an important mediator of the proliferation of these cells. Here, we review recent studies on YAP/TAZ function and regulation in epithelial tissue-specific stem cells, merging the Hu et al. study together with our current knowledge of YAP/TAZ.
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Affiliation(s)
- Julia Hicks-Berthet
- Department of Biochemistry, Boston University School of Medicine, Boston, MA, USA
| | - Xaralabos Varelas
- Department of Biochemistry, Boston University School of Medicine, Boston, MA, USA
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135
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Jasplakinolide induces primary cilium formation through cell rounding and YAP inactivation. PLoS One 2017; 12:e0183030. [PMID: 28797107 PMCID: PMC5552318 DOI: 10.1371/journal.pone.0183030] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 07/30/2017] [Indexed: 11/19/2022] Open
Abstract
Primary cilia are non-motile cilia that serve as cellular antennae for sensing and transducing extracellular signals. In general, primary cilia are generated by cell quiescence signals. Recent studies have shown that manipulations to increase actin assembly suppress quiescence-induced ciliogenesis. To further examine the role of actin dynamics in ciliogenesis, we analyzed the effect of jasplakinolide (Jasp), a potent inducer of actin polymerization, on ciliogenesis. Unexpectedly, Jasp treatment induced ciliogenesis in serum-fed cells cultured at low density. In contrast, Jasp had no apparent effect on ciliogenesis in cells cultured at higher densities. Jasp-induced ciliogenesis was correlated with a change in cell morphology from a flat and adherent shape to a round and weakly adherent one. Jasp treatment also induced the phosphorylation and cytoplasmic localization of the YAP transcriptional co-activator and suppressed cell proliferation in low density-cultured cells. Overexpression of an active form of YAP suppressed Jasp-induced ciliogenesis. These results suggest that Jasp induces ciliogenesis through cell rounding and cytoplasmic localization and inactivation of YAP. Knockdown of LATS1/2 only faintly suppressed Jasp-induced YAP phosphorylation, indicating that LATS1/2 are not primarily responsible for Jasp-induced YAP phosphorylation. Furthermore, overexpression of active Src kinase suppressed Jasp-induced cytoplasmic localization of YAP and ciliogenesis, suggesting that down-regulation of Src activity is involved in Jasp-induced YAP inactivation and ciliogenesis. Our data suggest that actin polymerization does not suppress ciliogenesis per se but rather that cell rounding and reduced cell adhesion are more crucially involved in Jasp-induced ciliogenesis.
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136
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Si Y, Ji X, Cao X, Dai X, Xu L, Zhao H, Guo X, Yan H, Zhang H, Zhu C, Zhou Q, Tang M, Xia Z, Li L, Cong YS, Ye S, Liang T, Feng XH, Zhao B. Src Inhibits the Hippo Tumor Suppressor Pathway through Tyrosine Phosphorylation of Lats1. Cancer Res 2017; 77:4868-4880. [PMID: 28754671 DOI: 10.1158/0008-5472.can-17-0391] [Citation(s) in RCA: 110] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 06/13/2017] [Accepted: 07/19/2017] [Indexed: 12/25/2022]
Abstract
The Hippo pathway regulates cell proliferation, apoptosis, and stem cell self-renewal, and its inactivation in animal models causes organ enlargement followed by tumorigenesis. Hippo pathway deregulation occurs in many human cancers, but the underlying mechanisms are not fully understood. Here, we report tyrosine phosphorylation of the Hippo pathway tumor suppressor LATS1 as a mechanism underlying its regulation by cell adhesion. A tyrosine kinase library screen identified Src as the kinase to directly phosphorylate LATS1 on multiple residues, causing attenuated Mob kinase activator binding and structural alteration of the substrate-binding pocket in the kinase domain. Cell matrix adhesion activated the Hippo pathway effector transcription coactivator YAP partially through Src-mediated phosphorylation and inhibition of LATS1. Aberrant Src activation abolished the tumor suppressor activity of LATS1 and induced tumorigenesis in a YAP-dependent manner. Protein levels of Src in human breast cancer tissues correlated with accumulation of active YAP dephosphorylated on the LATS1 target site. These findings reveal tyrosine phosphorylation of LATS1 by Src as a novel mechanism of Hippo pathway regulation by cell adhesion and suggest Src activation as an underlying reason for YAP deregulation in tumorigenesis. Cancer Res; 77(18); 4868-80. ©2017 AACR.
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Affiliation(s)
- Yuan Si
- Life Sciences Institute and Innovation Center for Cell Signaling Network, Zhejiang University, Hangzhou, Zhejiang, China
| | - Xinyan Ji
- Life Sciences Institute and Innovation Center for Cell Signaling Network, Zhejiang University, Hangzhou, Zhejiang, China
| | - Xiaolei Cao
- Life Sciences Institute and Innovation Center for Cell Signaling Network, Zhejiang University, Hangzhou, Zhejiang, China
| | - Xiaoming Dai
- Life Sciences Institute and Innovation Center for Cell Signaling Network, Zhejiang University, Hangzhou, Zhejiang, China
| | - Lingyi Xu
- Life Sciences Institute and Innovation Center for Cell Signaling Network, Zhejiang University, Hangzhou, Zhejiang, China
| | - Hongxia Zhao
- Life Sciences Institute and Innovation Center for Cell Signaling Network, Zhejiang University, Hangzhou, Zhejiang, China
| | - Xiaocan Guo
- Life Sciences Institute and Innovation Center for Cell Signaling Network, Zhejiang University, Hangzhou, Zhejiang, China
| | - Huan Yan
- Life Sciences Institute and Innovation Center for Cell Signaling Network, Zhejiang University, Hangzhou, Zhejiang, China
| | - Haitao Zhang
- Life Sciences Institute and Innovation Center for Cell Signaling Network, Zhejiang University, Hangzhou, Zhejiang, China
| | - Chu Zhu
- Life Sciences Institute and Innovation Center for Cell Signaling Network, Zhejiang University, Hangzhou, Zhejiang, China
| | - Qi Zhou
- Life Sciences Institute and Innovation Center for Cell Signaling Network, Zhejiang University, Hangzhou, Zhejiang, China
| | - Mei Tang
- Life Sciences Institute and Innovation Center for Cell Signaling Network, Zhejiang University, Hangzhou, Zhejiang, China
| | - Zongping Xia
- Life Sciences Institute and Innovation Center for Cell Signaling Network, Zhejiang University, Hangzhou, Zhejiang, China
| | - Li Li
- Institute of Aging Research, Hangzhou Normal University, Hangzhou, Zhejiang, China
| | - Yu-Sheng Cong
- Institute of Aging Research, Hangzhou Normal University, Hangzhou, Zhejiang, China
| | - Sheng Ye
- Life Sciences Institute and Innovation Center for Cell Signaling Network, Zhejiang University, Hangzhou, Zhejiang, China
| | - Tingbo Liang
- Department of Hepatobiliary and Pancreatic Surgery and the Key Laboratory of Cancer Prevention and Intervention, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Xin-Hua Feng
- Life Sciences Institute and Innovation Center for Cell Signaling Network, Zhejiang University, Hangzhou, Zhejiang, China
| | - Bin Zhao
- Life Sciences Institute and Innovation Center for Cell Signaling Network, Zhejiang University, Hangzhou, Zhejiang, China. .,Institute of Aging Research, Hangzhou Normal University, Hangzhou, Zhejiang, China
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137
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Hu JKH, Du W, Shelton SJ, Oldham MC, DiPersio CM, Klein OD. An FAK-YAP-mTOR Signaling Axis Regulates Stem Cell-Based Tissue Renewal in Mice. Cell Stem Cell 2017; 21:91-106.e6. [PMID: 28457749 DOI: 10.1016/j.stem.2017.03.023] [Citation(s) in RCA: 170] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 02/07/2017] [Accepted: 03/26/2017] [Indexed: 02/05/2023]
Abstract
Tissue homeostasis requires the production of newly differentiated cells from resident adult stem cells. Central to this process is the expansion of undifferentiated intermediates known as transit-amplifying (TA) cells, but how stem cells are triggered to enter this proliferative TA state remains an important open question. Using the continuously growing mouse incisor as a model of stem cell-based tissue renewal, we found that the transcriptional cofactors YAP and TAZ are required both to maintain TA cell proliferation and to inhibit differentiation. Specifically, we identified a pathway involving activation of integrin α3 in TA cells that signals through an LATS-independent FAK/CDC42/PP1A cascade to control YAP-S397 phosphorylation and nuclear localization. This leads to Rheb expression and potentiates mTOR signaling to drive the proliferation of TA cells. These findings thus reveal a YAP/TAZ signaling mechanism that coordinates stem cell expansion and differentiation during organ renewal.
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Affiliation(s)
- Jimmy Kuang-Hsien Hu
- Department of Orofacial Sciences and Program in Craniofacial Biology, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Wei Du
- Department of Orofacial Sciences and Program in Craniofacial Biology, University of California, San Francisco, San Francisco, CA 94143, USA; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China
| | - Samuel J Shelton
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA 94143, USA; Brain Tumor Research Center, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Michael C Oldham
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA 94143, USA; Brain Tumor Research Center, University of California, San Francisco, San Francisco, CA 94143, USA
| | - C Michael DiPersio
- Center for Cell Biology and Cancer Research, Albany Medical College, Albany, NY 12208, USA
| | - Ophir D Klein
- Department of Orofacial Sciences and Program in Craniofacial Biology, University of California, San Francisco, San Francisco, CA 94143, USA; Department of Pediatrics and Institute for Human Genetics, University of California, San Francisco, San Francisco, CA 94143, USA.
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138
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Andl T, Zhou L, Yang K, Kadekaro AL, Zhang Y. YAP and WWTR1: New targets for skin cancer treatment. Cancer Lett 2017; 396:30-41. [PMID: 28279717 DOI: 10.1016/j.canlet.2017.03.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 01/11/2017] [Accepted: 03/01/2017] [Indexed: 12/26/2022]
Abstract
The core components of the Hippo signaling pathway are a cascade of kinases that govern the phosphorylation of downstream transcriptional co-activators, namely, YES-associated protein (YAP) and WW domain-containing transcription regulator protein 1 (WWTR1, also known as TAZ). The Hippo signaling pathway is considered an important tumor-suppressor pathway, and its dysregulation has been noted in a variety of human cancers, in which YAP/WWTR1 enable cancerous cells to overcome contact inhibition, and to grow and spread uncontrollably. Interestingly, however, recent studies have told a somewhat different but perhaps more intriguing YAP/WWTR1 story, as these studies found that YAP/WWTR1 function as a central hub that integrates signals from multiple upstream signaling pathways, cell-cell interactions and mechanical forces and then bind to and activate different downstream transcriptional factors to direct cell social behavior and cell-cell interactions. In this review, we present the latest findings on the role of YAP/WWTR1 in skin physiology, pathology and tumorigenesis and discuss the statuses of newly developed therapeutic interventions that target YAP/WWTR1 in human cancers, as well as their prospects for use as skin cancer treatments.
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Affiliation(s)
- Thomas Andl
- Burnett School of Biological Sciences, University of Central Florida, Orlando, FL 32816, USA
| | - Linli Zhou
- Division of Pharmaceutical Sciences, College of Pharmacy, University of Cincinnati, Cincinnati, OH 45267, USA
| | - Kun Yang
- Division of Pharmaceutical Sciences, College of Pharmacy, University of Cincinnati, Cincinnati, OH 45267, USA
| | - Ana Luisa Kadekaro
- Department of Dermatology, College of Medicine, University of Cincinnati, Cincinnati, OH 45267, USA
| | - Yuhang Zhang
- Division of Pharmaceutical Sciences, College of Pharmacy, University of Cincinnati, Cincinnati, OH 45267, USA.
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139
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YAP-IL-6ST autoregulatory loop activated on APC loss controls colonic tumorigenesis. Proc Natl Acad Sci U S A 2017; 114:1643-1648. [PMID: 28130546 PMCID: PMC5320959 DOI: 10.1073/pnas.1620290114] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Loss of tumor suppressor adenomatous polyposis coli (APC) activates β-catenin to initiate colorectal tumorigenesis. However, β-catenin (CTNNB1) activating mutations rarely occur in human colorectal cancer (CRC). We found that APC loss also results in up-regulation of IL-6 signal transducer (IL-6ST/gp130), thereby activating Src family kinases (SFKs), YAP, and STAT3, which are simultaneously up-regulated in the majority of human CRC. Although, initial YAP activation, which stimulates IL6ST gene transcription, may be caused by reduced serine phosphorylation, sustained YAP activation depends on tyrosine phosphorylation by SFKs, whose inhibition, along with STAT3-activating JAK kinases, causes regression of established colorectal tumors. These results explain why APC loss is a more potent initiating event than the mere activation of CTNNB1.
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140
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Zhubanchaliyev A, Temirbekuly A, Kongrtay K, Wanshura LC, Kunz J. Targeting Mechanotransduction at the Transcriptional Level: YAP and BRD4 Are Novel Therapeutic Targets for the Reversal of Liver Fibrosis. Front Pharmacol 2016; 7:462. [PMID: 27990121 PMCID: PMC5131002 DOI: 10.3389/fphar.2016.00462] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 11/16/2016] [Indexed: 12/14/2022] Open
Abstract
Liver fibrosis is the result of a deregulated wound healing process characterized by the excessive deposition of extracellular matrix. Hepatic stellate cells (HSCs), which are activated in response to liver injury, are the major source of extracellular matrix and drive the wound healing process. However, chronic liver damage leads to perpetual HSC activation, progressive formation of pathological scar tissue and ultimately, cirrhosis and organ failure. HSC activation is triggered largely in response to mechanosignaling from the microenvironment, which induces a profibrotic nuclear transcription program that promotes HSC proliferation and extracellular matrix secretion thereby setting up a positive feedback loop leading to matrix stiffening and self-sustained, pathological, HSC activation. Despite the significant progress in our understanding of liver fibrosis, the molecular mechanisms through which the extracellular matrix promotes HSC activation are not well understood and no effective therapies have been approved to date that can target this early, reversible, stage in liver fibrosis. Several new lines of investigation now provide important insight into this area of study and identify two nuclear targets whose inhibition has the potential of reversing liver fibrosis by interfering with HSC activation: Yes-associated protein (YAP), a transcriptional co-activator and effector of the mechanosensitive Hippo pathway, and bromodomain-containing protein 4 (BRD4), an epigenetic regulator of gene expression. YAP and BRD4 activity is induced in response to mechanical stimulation of HSCs and each protein independently controls waves of early gene expression necessary for HSC activation. Significantly, inhibition of either protein can revert the chronic activation of HSCs and impede pathological progression of liver fibrosis in clinically relevant model systems. In this review we will discuss the roles of these nuclear co-activators in HSC activation, their mechanism of action in the fibrotic process in the liver and other organs, and the potential of targeting their activity with small molecule drugs for fibrosis reversal.
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Affiliation(s)
- Altynbek Zhubanchaliyev
- Department of Biology, School of Science and Technology, Nazarbayev UniversityAstana, Kazakhstan; Department of Biotechnology and Microbiology, Faculty of Natural Sciences, L.N.Gumilyov Eurasian National UniversityAstana, Kazakhstan
| | - Aibar Temirbekuly
- Department of Biology, School of Science and Technology, Nazarbayev University Astana, Kazakhstan
| | - Kuralay Kongrtay
- Department of Biology, School of Science and Technology, Nazarbayev University Astana, Kazakhstan
| | | | - Jeannette Kunz
- Department of Biology, School of Science and Technology, Nazarbayev University Astana, Kazakhstan
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141
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Li H, Gumbiner BM. Deregulation of the Hippo pathway in mouse mammary stem cells promotes mammary tumorigenesis. Mamm Genome 2016; 27:556-564. [PMID: 27601049 DOI: 10.1007/s00335-016-9662-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 08/30/2016] [Indexed: 01/08/2023]
Abstract
The Hippo-YAP pathway mediates organ size control, contact inhibition, and tumorigenesis. It is a kinase cascade that inhibits the nuclear localization and transcriptional activities of YAP and TAZ. E-cadherin, cell junctions, polarity proteins, and the merlin/NF2 tumor suppressor activate the pathway to inhibit YAP/TAZ activity, while growth factor signaling inhibits the pathway to activate YAP/TAZ in the nucleus. We examined its role in the development of mouse mammary glands and tumor formation using gland reconstitution by transplantation of genetically modified mammary stem cells (MaSCs). Knockdown of YAP and TAZ with shRNA in MaSCs did not inhibit gland reconstitution. In contrast, knockdown of β-catenin blocked gland reconstitution, consistent with the known role of Wnt signaling in mammary gland development. However, we find that Hippo signaling is involved in mammary tumor formation. Expression of a constitutively active form of YAP caused rapid formation of large tumors. Moreover, knockdown of YAP/TAZ slowed the development of tumors in polyoma middle T transgenic mice, a well-studied mammary tumor model involving activation of several signaling pathways. YAP accumulated in nuclei of mammary glands in ErbB2/EGFR-transgenic mice, suggesting that EGFR signaling affects YAP in vivo similar to cell culture. ErbB2/EGFR-transgenic mice develop mammary tumors in 7-8 months, but surprisingly, MaSCs from these mice did not form tumors when transplanted into host mice. Nonetheless, expression of dominant-negative Lats, which inhibits Hippo signaling, leads to tumor formation in ErbB2-transgenic mice, suggesting that Hippo signaling is involved in EGFR-induced mammary tumorigenesis.
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Affiliation(s)
- Hongbin Li
- Department of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA, 22908, USA
| | - Barry M Gumbiner
- Department of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA, 22908, USA. .,Department of Pediatrics, Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute, University of Washington School of Medicine, 1900 9th Ave. Mailstop JMB-5, Seattle, WA, 98101, USA.
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142
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Li CY, Hu J, Lu H, Lan J, Du W, Galicia N, Klein OD. αE-catenin inhibits YAP/TAZ activity to regulate signalling centre formation during tooth development. Nat Commun 2016; 7:12133. [PMID: 27405641 PMCID: PMC4947177 DOI: 10.1038/ncomms12133] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2015] [Accepted: 06/03/2016] [Indexed: 01/01/2023] Open
Abstract
Embryonic signalling centres are specialized clusters of non-proliferating cells that direct the development of many organs. However, the mechanisms that establish these essential structures in mammals are not well understood. Here we report, using the murine incisor as a model, that αE-catenin is essential for inhibiting nuclear YAP localization and cell proliferation. This function of αE-catenin is required for formation of the tooth signalling centre, the enamel knot (EK), which maintains dental mesenchymal condensation and epithelial invagination. EK formation depends primarily on the signalling function of αE-catenin through YAP and its homologue TAZ, as opposed to its adhesive function, and combined deletion of Yap and Taz rescues the EK defects caused by loss of αE-catenin. These findings point to a developmental mechanism by which αE-catenin restricts YAP/TAZ activity to establish a group of non-dividing and specialized cells that constitute a signalling centre. It is unclear which signals regulate the establishment of the tooth signalling centre, the enamel knot (EK). Here, the authors show that EK formation depends on αE-catenin, which acts to restrict the Hippo pathway transcription factors Yes-associated protein (YAP) and TAZ.
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Affiliation(s)
- Chun-Ying Li
- The Research Center and Department of Pathology, Zhongshan Hospital of Dalian University, Dalian 116001, China.,Department of Orofacial Sciences and Program in Craniofacial Biology, University of California, San Francisco, California 94143, USA
| | - Jimmy Hu
- Department of Orofacial Sciences and Program in Craniofacial Biology, University of California, San Francisco, California 94143, USA
| | - Hongbing Lu
- Department of Orofacial Sciences and Program in Craniofacial Biology, University of California, San Francisco, California 94143, USA
| | - Jing Lan
- Department of Orofacial Sciences and Program in Craniofacial Biology, University of California, San Francisco, California 94143, USA
| | - Wei Du
- Department of Orofacial Sciences and Program in Craniofacial Biology, University of California, San Francisco, California 94143, USA
| | - Nicole Galicia
- Department of Orofacial Sciences and Program in Craniofacial Biology, University of California, San Francisco, California 94143, USA
| | - Ophir D Klein
- Department of Orofacial Sciences and Program in Craniofacial Biology, University of California, San Francisco, California 94143, USA.,Department of Pediatrics and Institute for Human Genetics, University of California, San Francisco, California 94143, USA
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143
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Zanconato F, Cordenonsi M, Piccolo S. YAP/TAZ at the Roots of Cancer. Cancer Cell 2016; 29:783-803. [PMID: 27300434 PMCID: PMC6186419 DOI: 10.1016/j.ccell.2016.05.005] [Citation(s) in RCA: 1287] [Impact Index Per Article: 160.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 04/26/2016] [Accepted: 05/16/2016] [Indexed: 02/06/2023]
Abstract
YAP and TAZ are highly related transcriptional regulators pervasively activated in human malignancies. Recent work indicates that, remarkably, YAP/TAZ are essential for cancer initiation or growth of most solid tumors. Their activation induces cancer stem cell attributes, proliferation, chemoresistance, and metastasis. YAP/TAZ are sensors of the structural and mechanical features of the cell microenvironment. A number of cancer-associated extrinsic and intrinsic cues conspire to overrule the YAP-inhibiting microenvironment of normal tissues, including changes in mechanotransduction, inflammation, oncogenic signaling, and regulation of the Hippo pathway. Addiction to YAP/TAZ thus potentially represents a central cancer vulnerability that may be exploited therapeutically.
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Affiliation(s)
- Francesca Zanconato
- Department of Molecular Medicine, University of Padua School of Medicine, viale Colombo 3, 35126 Padua, Italy
| | - Michelangelo Cordenonsi
- Department of Molecular Medicine, University of Padua School of Medicine, viale Colombo 3, 35126 Padua, Italy.
| | - Stefano Piccolo
- Department of Molecular Medicine, University of Padua School of Medicine, viale Colombo 3, 35126 Padua, Italy.
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144
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Sun S, Irvine KD. Cellular Organization and Cytoskeletal Regulation of the Hippo Signaling Network. Trends Cell Biol 2016; 26:694-704. [PMID: 27268910 DOI: 10.1016/j.tcb.2016.05.003] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 04/29/2016] [Accepted: 05/10/2016] [Indexed: 01/12/2023]
Abstract
The Hippo signaling network integrates diverse upstream signals to control cell fate decisions and regulate organ growth. Recent studies have provided new insights into the cellular organization of Hippo signaling, its relationship to cell-cell junctions, and how the cytoskeleton modulates Hippo signaling. Cell-cell junctions serve as platforms for Hippo signaling by localizing scaffolding proteins that interact with core components of the pathway. Interactions of Hippo pathway components with cell-cell junctions and the cytoskeleton also suggest potential mechanisms for the regulation of the pathway by cell contact and cell polarity. As our understanding of the complexity of Hippo signaling increases, a future challenge will be to understand how the diverse inputs into the pathway are integrated and to define their respective contributions in vivo.
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Affiliation(s)
- Shuguo Sun
- Howard Hughes Medical Institute, Waksman Institute, and Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, NJ 08854, USA
| | - Kenneth D Irvine
- Howard Hughes Medical Institute, Waksman Institute, and Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, NJ 08854, USA.
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Elbediwy A, Vincent-Mistiaen ZI, Thompson BJ. YAP and TAZ in epithelial stem cells: A sensor for cell polarity, mechanical forces and tissue damage. Bioessays 2016; 38:644-53. [PMID: 27173018 PMCID: PMC5031209 DOI: 10.1002/bies.201600037] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The YAP/TAZ family of transcriptional co‐activators drives cell proliferation in epithelial tissues and cancers. Yet, how YAP and TAZ are physiologically regulated remains unclear. Here we review recent reports that YAP and TAZ act primarily as sensors of epithelial cell polarity, being inhibited when cells differentiate an apical membrane domain, and being activated when cells contact the extracellular matrix via their basal membrane domain. Apical signalling occurs via the canonical Crumbs/CRB‐Hippo/MST‐Warts/LATS kinase cascade to phosphorylate and inhibit YAP/TAZ. Basal signalling occurs via Integrins and Src family kinases to phosphorylate and activate YAP/TAZ. Thus, YAP/TAZ is localised to the nucleus in basal stem/progenitor cells and cytoplasm in differentiated squamous cells or columnar cells. In addition, other signals such as mechanical forces, tissue damage and possibly receptor tyrosine kinases (RTKs) can influence MST‐LATS or Src family kinase activity to modulate YAP/TAZ activity.
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Affiliation(s)
- Ahmed Elbediwy
- Epithelial Biology Laboratory, Francis Crick Institute, London, UK
| | | | - Barry J Thompson
- Epithelial Biology Laboratory, Francis Crick Institute, London, UK
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