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Aretz J, Aziz M, Strohmeyer N, Sattler M, Fässler R. Talin and kindlin use integrin tail allostery and direct binding to activate integrins. Nat Struct Mol Biol 2023; 30:1913-1924. [PMID: 38087085 PMCID: PMC10716038 DOI: 10.1038/s41594-023-01139-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 09/26/2023] [Indexed: 12/18/2023]
Abstract
Integrin affinity regulation, also termed integrin activation, is essential for metazoan life. Although talin and kindlin binding to the β-integrin cytoplasmic tail is indispensable for integrin activation, it is unknown how they achieve this function. By combining NMR, biochemistry and cell biology techniques, we found that talin and kindlin binding to the β-tail can induce a conformational change that increases talin affinity and decreases kindlin affinity toward it. We also discovered that this asymmetric affinity regulation is accompanied by a direct interaction between talin and kindlin, which promotes simultaneous binding of talin and kindlin to β-tails. Disrupting allosteric communication between the β-tail-binding sites of talin and kindlin or their direct interaction in cells severely compromised integrin functions. These data show how talin and kindlin cooperate to generate a small but critical population of ternary talin-β-integrin-kindlin complexes with high talin-integrin affinity and high dynamics.
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Affiliation(s)
- Jonas Aretz
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Masood Aziz
- Department of Bioscience, Technical University of Munich, TUM School of Natural Sciences, Garching, Germany
- Helmholtz Munich, Institute of Structural Biology, Neuherberg, Germany
| | - Nico Strohmeyer
- Department of Biosystems Science and Engineering, Eidgenössische Technische Hochschule Zürich, Basel, Switzerland
| | - Michael Sattler
- Department of Bioscience, Technical University of Munich, TUM School of Natural Sciences, Garching, Germany
- Helmholtz Munich, Institute of Structural Biology, Neuherberg, Germany
| | - Reinhard Fässler
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany.
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2
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Haake SM, Plosa EJ, Kropski JA, Venton LA, Reddy A, Bock F, Chang BT, Luna AJ, Nabukhotna K, Xu ZQ, Prather RA, Lee S, Tanjore H, Polosukhin VV, Viquez OM, Jones A, Luo W, Wilson MH, Rathmell WK, Massion PP, Pozzi A, Blackwell TS, Zent R. Ligand-independent integrin β1 signaling supports lung adenocarcinoma development. JCI Insight 2022; 7:154098. [PMID: 35763345 PMCID: PMC9462485 DOI: 10.1172/jci.insight.154098] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 06/24/2022] [Indexed: 11/17/2022] Open
Abstract
Integrins - the principal extracellular matrix (ECM) receptors of the cell - promote cell adhesion, migration, and proliferation, which are key events for cancer growth and metastasis. To date, most integrin-targeted cancer therapeutics have disrupted integrin-ECM interactions, which are viewed as critical for integrin functions. However, such agents have failed to improve cancer patient outcomes. We show that the highly expressed integrin β1 subunit is required for lung adenocarcinoma development in a carcinogen-induced mouse model. Likewise, human lung adenocarcinoma cell lines with integrin β1 deletion failed to form colonies in soft agar and tumors in mice. Mechanistically, we demonstrate that these effects do not require integrin β1-mediated adhesion to ECM but are dependent on integrin β1 cytoplasmic tail-mediated activation of focal adhesion kinase (FAK). These studies support a critical role for integrin β1 in lung tumorigenesis that is mediated through constitutive, ECM binding-independent signaling involving the cytoplasmic tail.
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Affiliation(s)
- Scott M. Haake
- Division of Hematology/Oncology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA.,Department of Veterans Affairs, Nashville, Tennessee, USA.,Vanderbilt-Ingram Cancer Center, Nashville, Tennessee, USA
| | - Erin J. Plosa
- Division of Neonatology, Department of Pediatrics, Nashville, Tennessee, USA
| | - Jonathan A. Kropski
- Department of Veterans Affairs, Nashville, Tennessee, USA.,Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA.,Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, USA
| | - Lindsay A. Venton
- Division of Hematology/Oncology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Anupama Reddy
- Vindhya Data Science, Morrisville, North Carolina, USA
| | - Fabian Bock
- Division of Nephrology and Hypertension, Department of Medicine, and
| | - Betty T. Chang
- Division of Hematology/Oncology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Allen J. Luna
- Division of Nephrology and Hypertension, Department of Medicine, and
| | | | - Zhi-Qi Xu
- Division of Hematology/Oncology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Rebecca A. Prather
- Division of Hematology/Oncology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Sharon Lee
- Division of Nephrology and Hypertension, Department of Medicine, and
| | - Harikrishna Tanjore
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Vasiliy V. Polosukhin
- Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Olga M. Viquez
- Division of Nephrology and Hypertension, Department of Medicine, and
| | - Angela Jones
- Vanderbilt Technologies for Advanced Genomics (VANTAGE), Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Wentian Luo
- Division of Nephrology and Hypertension, Department of Medicine, and
| | - Matthew H. Wilson
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, USA.,Division of Nephrology and Hypertension, Department of Medicine, and
| | - W. Kimryn Rathmell
- Division of Hematology/Oncology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA.,Vanderbilt-Ingram Cancer Center, Nashville, Tennessee, USA
| | - Pierre P. Massion
- Department of Veterans Affairs, Nashville, Tennessee, USA.,Vanderbilt-Ingram Cancer Center, Nashville, Tennessee, USA.,Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Ambra Pozzi
- Department of Veterans Affairs, Nashville, Tennessee, USA.,Vanderbilt-Ingram Cancer Center, Nashville, Tennessee, USA.,Division of Nephrology and Hypertension, Department of Medicine, and
| | - Timothy S. Blackwell
- Department of Veterans Affairs, Nashville, Tennessee, USA.,Vanderbilt-Ingram Cancer Center, Nashville, Tennessee, USA.,Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA.,Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, USA
| | - Roy Zent
- Department of Veterans Affairs, Nashville, Tennessee, USA.,Vanderbilt-Ingram Cancer Center, Nashville, Tennessee, USA.,Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, USA.,Division of Nephrology and Hypertension, Department of Medicine, and
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3
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Zhao B, Pan Y, Xu H, Song X. Wnt10a/β-catenin signalling is involved in kindlin-1-mediated astrocyte activation in a chronic construction injury rat model. Eur J Neurosci 2021; 54:7409-7421. [PMID: 34618385 DOI: 10.1111/ejn.15488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 09/23/2021] [Accepted: 09/27/2021] [Indexed: 11/28/2022]
Abstract
The activation of spinal astrocytes and release of neuroinflammatory mediators are important events in neuropathic pain (NP) pathogenesis. In this study, we investigated the role of Wnt10a/β-catenin signalling in kindlin-1-mediated astrocyte activation using a chronic constriction injury (CCI) NP rat model. Using kindlin-1 overexpression and knockdown plasmids, we assessed hyperalgesia, changes in spinal astrocyte activation and the release of inflammatory mediators in a NP rat model. We also performed coimmunoprecipitation, Western blotting and real-time polymerase chain reaction (PCR) to characterize the underlying mechanisms of kindlin-1 in astrocyte cultures in vitro. Kindlin-1 was significantly upregulated in CCI rats and promoted hyperalgesia. Moreover, we observed increased kindlin-1, Wnt10a and glial fibrillary acidic protein (GFAP; biomarker for astroglial injury) levels and the release of inflammatory mediators in NP rats (p < 0.05). Inhibiting GFAP in vitro led to decreased kindlin-1 levels, prevented astrocyte activation, decreased Wnt10a level and the release of inflammatory mediators (p < 0.05). Coimmunoprecipitation showed that kindlin-1 can interact with Wnt10a. We showed that kindlin-1-mediated astrocyte activation was associated with Wnt10a/β-catenin signalling and the downstream release of inflammatory mediators in a CCI NP rat model. Our findings provide novel insights into the molecular mechanisms of kindlin-1-mediated astrocyte activation after CCI.
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Affiliation(s)
- Baisong Zhao
- Department of Anesthesiology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Yongying Pan
- Department of Anesthesiology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Haiping Xu
- Department of Anesthesiology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Xingrong Song
- Department of Anesthesiology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
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4
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Sahana J, Corydon TJ, Wehland M, Krüger M, Kopp S, Melnik D, Kahlert S, Relja B, Infanger M, Grimm D. Alterations of Growth and Focal Adhesion Molecules in Human Breast Cancer Cells Exposed to the Random Positioning Machine. Front Cell Dev Biol 2021; 9:672098. [PMID: 34277614 PMCID: PMC8278480 DOI: 10.3389/fcell.2021.672098] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 05/27/2021] [Indexed: 01/03/2023] Open
Abstract
In this study, we evaluated changes in focal adhesions (FAs) in two types of breast cancer cell (BCC) lines (differentiated MCF-7 and the triple-negative MDA-MB-231 cell line) exposed to simulated microgravity (s-μg) created by a random positioning machine (RPM) for 24 h. After exposure, the BCC changed their growth behavior and exhibited two phenotypes in RPM samples: one portion of the cells grew as a normal two-dimensional monolayer [adherent (AD) BCC], while the other portion formed three-dimensional (3D) multicellular spheroids (MCS). After 1 h and 30 min (MDA-MB-231) and 1 h 40 min (MCF-7), the MCS adhered completely to the slide flask bottom. After 2 h, MDA-MB-231 MCS cells started to migrate, and after 6 h, a large number of the cells had left the MCS and continued to grow in a scattered pattern, whereas MCF-7 cells were growing as a confluent monolayer after 6 h and 24 h. We investigated the genes associated with the cytoskeleton, the extracellular matrix and FAs. ACTB, TUBB, FN1, FAK1, and PXN gene expression patterns were not significantly changed in MDA-MB-231 cells, but we observed a down-regulation of LAMA3, ITGB1 mRNAs in AD cells and of ITGB1, TLN1 and VCL mRNAs in MDA-MB-231 MCS. RPM-exposed MCF-7 cells revealed a down-regulation in the gene expression of FAK1, PXN, TLN1, VCL and CDH1 in AD cells and PXN, TLN and CDH1 in MCS. An interaction analysis of the examined genes involved in 3D growth and adhesion indicated a central role of fibronectin, vinculin, and E-cadherin. Live cell imaging of eGFP-vinculin in MCF-7 cells confirmed these findings. β-catenin-transfected MCF-7 cells revealed a nuclear expression in 1g and RPM-AD cells. The target genes BCL9, MYC and JUN of the Wnt/β-catenin signaling pathway were differentially expressed in RPM-exposed MCF-7 cells. These findings suggest that vinculin and β-catenin are key mediators of BCC to form MCS during 24 h of RPM-exposure.
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Affiliation(s)
| | - Thomas J Corydon
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Department of Ophthalmology, Aarhus University Hospital, Aarhus, Denmark
| | - Markus Wehland
- Department of Microgravity and Translational Regenerative Medicine, Clinic for Plastic, Aesthetic and Hand Surgery, Otto von Guericke University, Magdeburg, Germany.,Research Group "Magdeburger Arbeitsgemeinschaft für Forschung unter Raumfahrt- und Schwerelosigkeitsbedingungen" (MARS), Otto von Guericke University, Magdeburg, Germany
| | - Marcus Krüger
- Department of Microgravity and Translational Regenerative Medicine, Clinic for Plastic, Aesthetic and Hand Surgery, Otto von Guericke University, Magdeburg, Germany.,Research Group "Magdeburger Arbeitsgemeinschaft für Forschung unter Raumfahrt- und Schwerelosigkeitsbedingungen" (MARS), Otto von Guericke University, Magdeburg, Germany
| | - Sascha Kopp
- Department of Microgravity and Translational Regenerative Medicine, Clinic for Plastic, Aesthetic and Hand Surgery, Otto von Guericke University, Magdeburg, Germany.,Research Group "Magdeburger Arbeitsgemeinschaft für Forschung unter Raumfahrt- und Schwerelosigkeitsbedingungen" (MARS), Otto von Guericke University, Magdeburg, Germany
| | - Daniela Melnik
- Department of Microgravity and Translational Regenerative Medicine, Clinic for Plastic, Aesthetic and Hand Surgery, Otto von Guericke University, Magdeburg, Germany
| | - Stefan Kahlert
- Institute of Anatomy, Otto von Guericke University, Magdeburg, Germany
| | - Borna Relja
- Department of Radiology and Nuclear Medicine, Experimental Radiology, Otto von Guericke University, Magdeburg, Germany
| | - Manfred Infanger
- Department of Microgravity and Translational Regenerative Medicine, Clinic for Plastic, Aesthetic and Hand Surgery, Otto von Guericke University, Magdeburg, Germany.,Research Group "Magdeburger Arbeitsgemeinschaft für Forschung unter Raumfahrt- und Schwerelosigkeitsbedingungen" (MARS), Otto von Guericke University, Magdeburg, Germany
| | - Daniela Grimm
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Department of Microgravity and Translational Regenerative Medicine, Clinic for Plastic, Aesthetic and Hand Surgery, Otto von Guericke University, Magdeburg, Germany.,Research Group "Magdeburger Arbeitsgemeinschaft für Forschung unter Raumfahrt- und Schwerelosigkeitsbedingungen" (MARS), Otto von Guericke University, Magdeburg, Germany
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5
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Grimm TM, Dierdorf NI, Betz K, Paone C, Hauck CR. PPM1F controls integrin activity via a conserved phospho-switch. J Cell Biol 2020; 219:211512. [PMID: 33119040 PMCID: PMC7604772 DOI: 10.1083/jcb.202001057] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 07/20/2020] [Accepted: 09/11/2020] [Indexed: 01/04/2023] Open
Abstract
Control of integrin activity is vital during development and tissue homeostasis, while derailment of integrin function contributes to pathophysiological processes. Phosphorylation of a conserved threonine motif (T788/T789) in the integrin β cytoplasmic domain increases integrin activity. Here, we report that T788/T789 functions as a phospho-switch, which determines the association with either talin and kindlin-2, the major integrin activators, or filaminA, an integrin activity suppressor. A genetic screen identifies the phosphatase PPM1F as the critical enzyme, which selectively and directly dephosphorylates the T788/T789 motif. PPM1F-deficient cell lines show constitutive integrin phosphorylation, exaggerated talin binding, increased integrin activity, and enhanced cell adhesion. These gain-of-function phenotypes are reverted by reexpression of active PPM1F, but not a phosphatase-dead mutant. Disruption of the ppm1f gene in mice results in early embryonic death at day E10.5. Together, PPM1F controls the T788/T789 phospho-switch in the integrin β1 cytoplasmic tail and constitutes a novel target to modulate integrin activity.
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Affiliation(s)
- Tanja M. Grimm
- Lehrstuhl Zellbiologie, Fachbereich Biologie, Universität Konstanz, Konstanz, Germany,Konstanz Research School Chemical Biology, Universität Konstanz, Konstanz, Germany
| | - Nina I. Dierdorf
- Lehrstuhl Zellbiologie, Fachbereich Biologie, Universität Konstanz, Konstanz, Germany,Konstanz Research School Chemical Biology, Universität Konstanz, Konstanz, Germany
| | - Karin Betz
- Konstanz Research School Chemical Biology, Universität Konstanz, Konstanz, Germany,Lehrstuhl Zelluläre Chemie, Fachbereich Chemie, Universität Konstanz, Konstanz, Germany
| | - Christoph Paone
- Lehrstuhl Zellbiologie, Fachbereich Biologie, Universität Konstanz, Konstanz, Germany,Konstanz Research School Chemical Biology, Universität Konstanz, Konstanz, Germany
| | - Christof R. Hauck
- Lehrstuhl Zellbiologie, Fachbereich Biologie, Universität Konstanz, Konstanz, Germany,Konstanz Research School Chemical Biology, Universität Konstanz, Konstanz, Germany,Correspondence to Christof R. Hauck:
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6
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Integrins Control Vesicular Trafficking; New Tricks for Old Dogs. Trends Biochem Sci 2020; 46:124-137. [PMID: 33020011 PMCID: PMC7531435 DOI: 10.1016/j.tibs.2020.09.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 08/24/2020] [Accepted: 09/04/2020] [Indexed: 02/07/2023]
Abstract
Integrins are transmembrane receptors that transduce biochemical and mechanical signals across the plasma membrane and promote cell adhesion and migration. In addition, integrin adhesion complexes are functionally and structurally linked to components of the intracellular trafficking machinery and accumulating data now reveal that they are key regulators of endocytosis and exocytosis in a variety of cell types. Here, we highlight recent insights into integrin control of intracellular trafficking in processes such as degranulation, mechanotransduction, cell–cell communication, antibody production, virus entry, Toll-like receptor signaling, autophagy, and phagocytosis, as well as the release and uptake of extracellular vesicles. We discuss the underlying molecular mechanisms and the implications for a range of pathophysiological contexts, including hemostasis, immunity, tissue repair, cancer, and viral infection. Integrin adhesion complexes control polarized targeting of the intracellular trafficking machinery via microtubules. Integrin adhesions are exocytic hubs for a variety of vesicles, including lytic and dense granules, lysosome-related organelles, and biosynthetic vesicles. Integrin-dependent adhesion and signaling is required for degranulation of platelets and leukocytes and controls hemostasis and immunity. Specialized adhesion complexes containing integrin αvβ5 and clathrin are sites of frustrated endocytosis and hubs for mechanotransduction. Integrin control of endocytosis regulates Toll-like receptor signaling and autophagy in immune cells. Integrins control intercellular communication and viral transfer through extracellular vesicles.
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7
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Samarelli AV, Ziegler T, Meves A, Fässler R, Böttcher RT. Rabgap1 promotes recycling of active β1 integrins to support effective cell migration. J Cell Sci 2020; 133:jcs243683. [PMID: 32843574 PMCID: PMC7522031 DOI: 10.1242/jcs.243683] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 08/13/2020] [Indexed: 12/13/2022] Open
Abstract
Integrin function depends on the continuous internalization of integrins and their subsequent endosomal recycling to the plasma membrane to drive adhesion dynamics, cell migration and invasion. Here we assign a pivotal role for Rabgap1 (GAPCenA) in the recycling of endocytosed active β1 integrins to the plasma membrane. The phosphotyrosine-binding (PTB) domain of Rabgap1 binds to the membrane-proximal NPxY motif in the cytoplasmic domain of β1 integrin subunits on endosomes. Silencing Rabgap1 in mouse fibroblasts leads to the intracellular accumulation of active β1 integrins, alters focal adhesion formation, and decreases cell migration and cancer cell invasion. Functionally, Rabgap1 facilitates active β1 integrin recycling to the plasma membrane through attenuation of Rab11 activity. Taken together, our results identify Rabgap1 as an important factor for conformation-specific integrin trafficking and define the role of Rabgap1 in β1-integrin-mediated cell migration in mouse fibroblasts and breast cancer cells.
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Affiliation(s)
- Anna V Samarelli
- Department of Molecular Medicine, Max Planck Institute for Biochemistry, 82152 Martinsried, Germany
| | - Tilman Ziegler
- Department of Molecular Medicine, Max Planck Institute for Biochemistry, 82152 Martinsried, Germany
| | - Alexander Meves
- Department of Molecular Medicine, Max Planck Institute for Biochemistry, 82152 Martinsried, Germany
- Department of Dermatology, Mayo Clinic, Rochester, MN 55905, USA
| | - Reinhard Fässler
- Department of Molecular Medicine, Max Planck Institute for Biochemistry, 82152 Martinsried, Germany
| | - Ralph T Böttcher
- Department of Molecular Medicine, Max Planck Institute for Biochemistry, 82152 Martinsried, Germany
- DZHK - German Centre for Cardiovascular Research, partner site Munich Heart Alliance, 80802 Munich, Germany
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8
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Morphological and Molecular Changes in Juvenile Normal Human Fibroblasts Exposed to Simulated Microgravity. Sci Rep 2019; 9:11882. [PMID: 31417174 PMCID: PMC6695420 DOI: 10.1038/s41598-019-48378-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 08/05/2019] [Indexed: 02/07/2023] Open
Abstract
The literature suggests morphological alterations and molecular biological changes within the cellular milieu of human cells, exposed to microgravity (µg), as many cell types assemble to multicellular spheroids (MCS). In this study we investigated juvenile normal human dermal fibroblasts (NHDF) grown in simulated µg (s-µg) on a random positioning machine (RPM), aiming to study changes in cell morphology, cytoskeleton, extracellular matrix (ECM), focal adhesion and growth factors. On the RPM, NHDF formed an adherent monolayer and compact MCS. For the two cell populations we found a differential regulation of fibronectin, laminin, collagen-IV, aggrecan, osteopontin, TIMP-1, integrin-β1, caveolin-1, E-cadherin, talin-1, vimentin, α-SM actin, TGF-β1, IL-8, MCP-1, MMP-1, and MMP-14 both on the transcriptional and/or translational level. Immunofluorescence staining revealed only slight structural changes in cytoskeletal components. Flow cytometry showed various membrane-bound proteins with considerable variations. In silico analyses of the regulated proteins revealed an interaction network, contributing to MCS growth via signals mediated by integrin-β1, E-cadherin, caveolin-1 and talin-1. In conclusion, s-µg-conditions induced changes in the cytoskeleton, ECM, focal adhesion and growth behavior of NHDF and we identified for the first time factors involved in fibroblast 3D-assembly. This new knowledge might be of importance in tissue engineering, wound healing and cancer metastasis.
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Mathew S, Palamuttam RJ, Mernaugh G, Ramalingam H, Lu Z, Zhang MZ, Ishibe S, Critchley DR, Fässler R, Pozzi A, Sanders CR, Carroll TJ, Zent R. Talin regulates integrin β1-dependent and -independent cell functions in ureteric bud development. Development 2017; 144:4148-4158. [PMID: 28993400 DOI: 10.1242/dev.149914] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 09/28/2017] [Indexed: 12/20/2022]
Abstract
Kidney collecting system development requires integrin-dependent cell-extracellular matrix interactions. Integrins are heterodimeric transmembrane receptors consisting of α and β subunits; crucial integrins in the kidney collecting system express the β1 subunit. The β1 cytoplasmic tail has two NPxY motifs that mediate functions by binding to cytoplasmic signaling and scaffolding molecules. Talins, scaffolding proteins that bind to the membrane proximal NPxY motif, are proposed to activate integrins and to link them to the actin cytoskeleton. We have defined the role of talin binding to the β1 proximal NPxY motif in the developing kidney collecting system in mice that selectively express a Y-to-A mutation in this motif. The mice developed a hypoplastic dysplastic collecting system. Collecting duct cells expressing this mutation had moderate abnormalities in cell adhesion, migration, proliferation and growth factor-dependent signaling. In contrast, mice lacking talins in the developing ureteric bud developed kidney agenesis and collecting duct cells had severe cytoskeletal, adhesion and polarity defects. Thus, talins are essential for kidney collecting duct development through mechanisms that extend beyond those requiring binding to the β1 integrin subunit NPxY motif.
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Affiliation(s)
- Sijo Mathew
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Riya J Palamuttam
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Glenda Mernaugh
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Harini Ramalingam
- Department of Medicine and Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Zhenwei Lu
- Center for Structure Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA.,Department of Molecular Physiology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Ming-Zhi Zhang
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Shuta Ishibe
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06510, USA
| | - David R Critchley
- Department of Biochemistry, University of Leicester, Leicester LE1 7RH, UK
| | - Reinhard Fässler
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried 82152, Germany
| | - Ambra Pozzi
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA.,Department of Molecular Physiology, Vanderbilt University Medical Center, Nashville, TN 37232, USA.,Veteran Affairs Hospital Nashville, TN 37212, USA
| | - Charles R Sanders
- Department of Biochemistry, Vanderbilt University Medical Center, Nashville, TN 37232, USA.,Center for Structure Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Thomas J Carroll
- Department of Medicine and Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Roy Zent
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA .,Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA.,Veteran Affairs Hospital Nashville, TN 37212, USA
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10
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Meves A, Nikolova E, Heim JB, Squirewell EJ, Cappel MA, Pittelkow MR, Otley CC, Behrendt N, Saunte DM, Lock-Andersen J, Schenck LA, Weaver AL, Suman VJ. Tumor Cell Adhesion As a Risk Factor for Sentinel Lymph Node Metastasis in Primary Cutaneous Melanoma. J Clin Oncol 2015; 33:2509-15. [PMID: 26150443 DOI: 10.1200/jco.2014.60.7002] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
PURPOSE Less than 20% of patients with melanoma who undergo sentinel lymph node (SLN) biopsy based on American Society of Clinical Oncology/Society of Surgical Oncology recommendations are SLN positive. We present a multi-institutional study to discover new molecular risk factors associated with SLN positivity in thin and intermediate-thickness melanoma. PATIENTS AND METHODS Gene clusters with functional roles in melanoma metastasis were discovered by next-generation sequencing and validated by quantitative polymerase chain reaction using a discovery set of 73 benign nevi, 76 primary cutaneous melanoma, and 11 in-transit melanoma metastases. We then used polymerase chain reaction to quantify gene expression in a model development cohort of 360 consecutive thin and intermediate-thickness melanomas and a validation cohort of 146 melanomas. Outcome of interest was SLN biopsy metastasis within 90 days of melanoma diagnosis. Logic and logistic regression analyses were used to develop a model for the likelihood of SLN metastasis from molecular, clinical, and histologic variables. RESULTS ITGB3, LAMB1, PLAT, and TP53 expression were associated with SLN metastasis. The predictive ability of a model that included these molecular variables in combination with clinicopathologic variables (patient age, Breslow depth, and tumor ulceration) was significantly greater than a model that only considered clinicopathologic variables and also performed well in the validation cohort (area under the curve, 0.93; 95% CI, 0.87 to 0.97; false-positive and false-negative rates of 22% and 0%, respectively, using a 10% cutoff for predicted SLN metastasis risk). CONCLUSION The addition of cell adhesion-linked gene expression variables to clinicopathologic variables improves the identification of patients with SLN metastases within 90 days of melanoma diagnosis.
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Affiliation(s)
- Alexander Meves
- Alexander Meves, Ekaterina Nikolova, Joel B. Heim, Edwin J. Squirewell, Clark C. Otley, Louis A. Schenck, Amy L. Weaver, and Vera J. Suman, Mayo Clinic, Rochester, MN; Mark A. Cappel, Mayo Clinic, Jacksonville, FL; Mark R. Pittelkow, Mayo Clinic, Scottsdale, AZ; and Nille Behrendt, Ditte M. Saunte, and Jorgen Lock-Andersen, Hospital Roskilde, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - Ekaterina Nikolova
- Alexander Meves, Ekaterina Nikolova, Joel B. Heim, Edwin J. Squirewell, Clark C. Otley, Louis A. Schenck, Amy L. Weaver, and Vera J. Suman, Mayo Clinic, Rochester, MN; Mark A. Cappel, Mayo Clinic, Jacksonville, FL; Mark R. Pittelkow, Mayo Clinic, Scottsdale, AZ; and Nille Behrendt, Ditte M. Saunte, and Jorgen Lock-Andersen, Hospital Roskilde, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Joel B Heim
- Alexander Meves, Ekaterina Nikolova, Joel B. Heim, Edwin J. Squirewell, Clark C. Otley, Louis A. Schenck, Amy L. Weaver, and Vera J. Suman, Mayo Clinic, Rochester, MN; Mark A. Cappel, Mayo Clinic, Jacksonville, FL; Mark R. Pittelkow, Mayo Clinic, Scottsdale, AZ; and Nille Behrendt, Ditte M. Saunte, and Jorgen Lock-Andersen, Hospital Roskilde, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Edwin J Squirewell
- Alexander Meves, Ekaterina Nikolova, Joel B. Heim, Edwin J. Squirewell, Clark C. Otley, Louis A. Schenck, Amy L. Weaver, and Vera J. Suman, Mayo Clinic, Rochester, MN; Mark A. Cappel, Mayo Clinic, Jacksonville, FL; Mark R. Pittelkow, Mayo Clinic, Scottsdale, AZ; and Nille Behrendt, Ditte M. Saunte, and Jorgen Lock-Andersen, Hospital Roskilde, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Mark A Cappel
- Alexander Meves, Ekaterina Nikolova, Joel B. Heim, Edwin J. Squirewell, Clark C. Otley, Louis A. Schenck, Amy L. Weaver, and Vera J. Suman, Mayo Clinic, Rochester, MN; Mark A. Cappel, Mayo Clinic, Jacksonville, FL; Mark R. Pittelkow, Mayo Clinic, Scottsdale, AZ; and Nille Behrendt, Ditte M. Saunte, and Jorgen Lock-Andersen, Hospital Roskilde, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Mark R Pittelkow
- Alexander Meves, Ekaterina Nikolova, Joel B. Heim, Edwin J. Squirewell, Clark C. Otley, Louis A. Schenck, Amy L. Weaver, and Vera J. Suman, Mayo Clinic, Rochester, MN; Mark A. Cappel, Mayo Clinic, Jacksonville, FL; Mark R. Pittelkow, Mayo Clinic, Scottsdale, AZ; and Nille Behrendt, Ditte M. Saunte, and Jorgen Lock-Andersen, Hospital Roskilde, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Clark C Otley
- Alexander Meves, Ekaterina Nikolova, Joel B. Heim, Edwin J. Squirewell, Clark C. Otley, Louis A. Schenck, Amy L. Weaver, and Vera J. Suman, Mayo Clinic, Rochester, MN; Mark A. Cappel, Mayo Clinic, Jacksonville, FL; Mark R. Pittelkow, Mayo Clinic, Scottsdale, AZ; and Nille Behrendt, Ditte M. Saunte, and Jorgen Lock-Andersen, Hospital Roskilde, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Nille Behrendt
- Alexander Meves, Ekaterina Nikolova, Joel B. Heim, Edwin J. Squirewell, Clark C. Otley, Louis A. Schenck, Amy L. Weaver, and Vera J. Suman, Mayo Clinic, Rochester, MN; Mark A. Cappel, Mayo Clinic, Jacksonville, FL; Mark R. Pittelkow, Mayo Clinic, Scottsdale, AZ; and Nille Behrendt, Ditte M. Saunte, and Jorgen Lock-Andersen, Hospital Roskilde, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Ditte M Saunte
- Alexander Meves, Ekaterina Nikolova, Joel B. Heim, Edwin J. Squirewell, Clark C. Otley, Louis A. Schenck, Amy L. Weaver, and Vera J. Suman, Mayo Clinic, Rochester, MN; Mark A. Cappel, Mayo Clinic, Jacksonville, FL; Mark R. Pittelkow, Mayo Clinic, Scottsdale, AZ; and Nille Behrendt, Ditte M. Saunte, and Jorgen Lock-Andersen, Hospital Roskilde, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jorgen Lock-Andersen
- Alexander Meves, Ekaterina Nikolova, Joel B. Heim, Edwin J. Squirewell, Clark C. Otley, Louis A. Schenck, Amy L. Weaver, and Vera J. Suman, Mayo Clinic, Rochester, MN; Mark A. Cappel, Mayo Clinic, Jacksonville, FL; Mark R. Pittelkow, Mayo Clinic, Scottsdale, AZ; and Nille Behrendt, Ditte M. Saunte, and Jorgen Lock-Andersen, Hospital Roskilde, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Louis A Schenck
- Alexander Meves, Ekaterina Nikolova, Joel B. Heim, Edwin J. Squirewell, Clark C. Otley, Louis A. Schenck, Amy L. Weaver, and Vera J. Suman, Mayo Clinic, Rochester, MN; Mark A. Cappel, Mayo Clinic, Jacksonville, FL; Mark R. Pittelkow, Mayo Clinic, Scottsdale, AZ; and Nille Behrendt, Ditte M. Saunte, and Jorgen Lock-Andersen, Hospital Roskilde, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Amy L Weaver
- Alexander Meves, Ekaterina Nikolova, Joel B. Heim, Edwin J. Squirewell, Clark C. Otley, Louis A. Schenck, Amy L. Weaver, and Vera J. Suman, Mayo Clinic, Rochester, MN; Mark A. Cappel, Mayo Clinic, Jacksonville, FL; Mark R. Pittelkow, Mayo Clinic, Scottsdale, AZ; and Nille Behrendt, Ditte M. Saunte, and Jorgen Lock-Andersen, Hospital Roskilde, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Vera J Suman
- Alexander Meves, Ekaterina Nikolova, Joel B. Heim, Edwin J. Squirewell, Clark C. Otley, Louis A. Schenck, Amy L. Weaver, and Vera J. Suman, Mayo Clinic, Rochester, MN; Mark A. Cappel, Mayo Clinic, Jacksonville, FL; Mark R. Pittelkow, Mayo Clinic, Scottsdale, AZ; and Nille Behrendt, Ditte M. Saunte, and Jorgen Lock-Andersen, Hospital Roskilde, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Tseng HY, Thorausch N, Ziegler T, Meves A, Fässler R, Böttcher RT. Sorting Nexin 31 Binds Multiple β Integrin Cytoplasmic Domains and Regulates β1 Integrin Surface Levels and Stability. J Mol Biol 2014; 426:3180-3194. [DOI: 10.1016/j.jmb.2014.07.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 06/17/2014] [Accepted: 07/03/2014] [Indexed: 11/24/2022]
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Abstract
Kindler syndrome (KS) in humans is a severe skin blistering disease associated with inflammation and increased risk of epidermal squamous cell carcinoma (SCC). This disease is known to be caused by loss-of-function mutations in Kindlin-1, a focal adhesion β-integrin binding protein. Thus far, it has been unclear what specific signaling events occur in KS keratinocytes to promote tumorigenesis, especially since loss of β-integrins and focal adhesion complexes has been previously shown to prevent or delay tumor formation. In the April issue of Nature Medicine, Rognoni and colleagues generate a transgenic mouse lacking Kindlin-1 in the epidermis to model the key features of KS, and show that Kindlin-1 regulates Wnt and TGFβ signaling independent of β-integrins. These β1-integrin-independent functions of Kindlin-1 may contribute to the increased SCC risk in KS patients.
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Affiliation(s)
| | - Todd W Ridky
- Department of Dermatology; University of Pennsylvania; Philadelphia, PA USA
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Ernst N, Yay A, Bíró T, Tiede S, Humphries M, Paus R, Kloepper JE. β1 integrin signaling maintains human epithelial progenitor cell survival in situ and controls proliferation, apoptosis and migration of their progeny. PLoS One 2013; 8:e84356. [PMID: 24386370 PMCID: PMC3874009 DOI: 10.1371/journal.pone.0084356] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Accepted: 11/14/2013] [Indexed: 01/05/2023] Open
Abstract
β1 integrin regulates multiple epithelial cell functions by connecting cells with the extracellular matrix (ECM). While β1 integrin-mediated signaling in murine epithelial stem cells is well-studied, its role in human adult epithelial progenitor cells (ePCs) in situ remains to be defined. Using microdissected, organ-cultured human scalp hair follicles (HFs) as a clinically relevant model for studying human ePCs within their natural topobiological habitat, β1 integrin-mediated signaling in ePC biology was explored by β1 integrin siRNA silencing, specific β1 integrin-binding antibodies and pharmacological inhibition of integrin-linked kinase (ILK), a key component of the integrin-induced signaling cascade. β1 integrin knock down reduced keratin 15 (K15) expression as well as the proliferation of outer root sheath keratinocytes (ORSKs). Embedding of HF epithelium into an ECM rich in β1 integrin ligands that mimic the HF mesenchyme significantly enhanced proliferation and migration of ORSKs, while K15 and CD200 gene and protein expression were inhibited. Employing ECM-embedded β1 integrin-activating or -inhibiting antibodies allowed to identify functionally distinct human ePC subpopulations in different compartments of the HF epithelium. The β1 integrin-inhibitory antibody reduced β1 integrin expression in situ and selectively enhanced proliferation of bulge ePCs, while the β1 integrin-stimulating antibody decreased hair matrix keratinocyte apoptosis and enhanced transferrin receptor (CD71) immunoreactivity, a marker of transit amplifying cells, but did not affect bulge ePC proliferation. That the putative ILK inhibitor QLT0267 significantly reduced ORSK migration and proliferation and induced massive ORSK apoptosis suggests a key role for ILK in mediating the ß1 integrin effects. Taken together, these findings demonstrate that ePCs in human HFs require β1 integrin-mediated signaling for survival, adhesion, and migration, and that different human HF ePC subpopulations differ in their response to β1 integrin signaling. These insights may be exploited for cell-based regenerative medicine strategies that employ human HF-derived ePCs.
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Affiliation(s)
- Nancy Ernst
- Department of Dermatology, University of Luebeck, Luebeck, Germany
| | - Arzu Yay
- Department of Histology and Embryology, University of Erciyes, Kayseri, Turkey
| | - Tamás Bíró
- DE-MTA ‘‘Lendület’’ Cellular Physiology Group, Department of Physiology, University of Debrecen, Debrecen, Hungary
| | - Stephan Tiede
- Institute of Experimental Immunology, Euroimmun AG, Luebeck, Germany
| | - Martin Humphries
- Faculty of Life Sciences, University of Manchester, Manchester, United Kingdom
| | - Ralf Paus
- Department of Dermatology, University of Luebeck, Luebeck, Germany
- Institute of Inflammation and Repair, University of Manchester, Manchester, United Kingdom
- * E-mail:
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14
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Duperret EK, Ridky TW. Focal adhesion complex proteins in epidermis and squamous cell carcinoma. Cell Cycle 2013; 12:3272-85. [PMID: 24036537 DOI: 10.4161/cc.26385] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Focal adhesions (FAs) are large, integrin-containing, multi-protein assemblies spanning the plasma membrane that link the cellular cytoskeleton to surrounding extracellular matrix. They play critical roles in adhesion and cell signaling and are major regulators of epithelial homeostasis, tissue response to injury, and tumorigenesis. Most integrin subunits and their associated FA proteins are expressed in skin, and murine genetic models have provided insight into the functional roles of FAs in normal and neoplastic epidermis. Here, we discuss the roles of these proteins in normal epidermal proliferation, adhesion, wound healing, and cancer. While many downstream signaling mechanisms remain unclear, the critically important roles of FAs are highlighted by the development of therapeutics targeting FAs for human cancer.
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