1
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Quaglia F, Krishn SR, Sossey-Alaoui K, Rana PS, Pluskota E, Park PH, Shields CD, Lin S, McCue P, Kossenkov AV, Wang Y, Goodrich DW, Ku SY, Beltran H, Kelly WK, Corey E, Klose M, Bandtlow C, Liu Q, Altieri DC, Plow EF, Languino LR. The NOGO receptor NgR2, a novel αVβ3 integrin effector, induces neuroendocrine differentiation in prostate cancer. Sci Rep 2022; 12:18879. [PMID: 36344556 PMCID: PMC9640716 DOI: 10.1038/s41598-022-21711-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 09/30/2022] [Indexed: 11/09/2022] Open
Abstract
Androgen deprivation therapies aimed to target prostate cancer (PrCa) are only partially successful given the occurrence of neuroendocrine PrCa (NEPrCa), a highly aggressive and highly metastatic form of PrCa, for which there is no effective therapeutic approach. Our group has demonstrated that while absent in prostate adenocarcinoma, the αVβ3 integrin expression is increased during PrCa progression toward NEPrCa. Here, we show a novel pathway activated by αVβ3 that promotes NE differentiation (NED). This novel pathway requires the expression of a GPI-linked surface molecule, NgR2, also known as Nogo-66 receptor homolog 1. We show here that NgR2 is upregulated by αVβ3, to which it associates; we also show that it promotes NED and anchorage-independent growth, as well as a motile phenotype of PrCa cells. Given our observations that high levels of αVβ3 and, as shown here, of NgR2 are detected in human and mouse NEPrCa, our findings appear to be highly relevant to this aggressive and metastatic subtype of PrCa. This study is novel because NgR2 role has only minimally been investigated in cancer and has instead predominantly been analyzed in neurons. These data thus pave new avenues toward a comprehensive mechanistic understanding of integrin-directed signaling during PrCa progression toward a NE phenotype.
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Affiliation(s)
- Fabio Quaglia
- Prostate Cancer Discovery and Development Program, Thomas Jefferson University, Philadelphia, PA, USA
- Department of Pharmacology, Physiology, and Cancer Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Shiv Ram Krishn
- Prostate Cancer Discovery and Development Program, Thomas Jefferson University, Philadelphia, PA, USA
- Department of Pharmacology, Physiology, and Cancer Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Khalid Sossey-Alaoui
- Department of Medicine, School of Medicine, MetroHealth Medical Center, Rammelkamp Center for Research, Case Western Reserve University, Cleveland, OH, USA
| | - Priyanka Shailendra Rana
- Department of Medicine, School of Medicine, MetroHealth Medical Center, Rammelkamp Center for Research, Case Western Reserve University, Cleveland, OH, USA
| | - Elzbieta Pluskota
- Cardiovascular and Metabolic Sciences Department, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Pyung Hun Park
- Prostate Cancer Discovery and Development Program, Thomas Jefferson University, Philadelphia, PA, USA
- Department of Pharmacology, Physiology, and Cancer Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Christopher D Shields
- Prostate Cancer Discovery and Development Program, Thomas Jefferson University, Philadelphia, PA, USA
- Department of Pharmacology, Physiology, and Cancer Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Stephen Lin
- Prostate Cancer Discovery and Development Program, Thomas Jefferson University, Philadelphia, PA, USA
- Department of Pharmacology, Physiology, and Cancer Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Peter McCue
- Department of Pathology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Andrew V Kossenkov
- Center for Systems and Computational Biology, Wistar Institute, Philadelphia, PA, USA
| | - Yanqing Wang
- Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - David W Goodrich
- Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Sheng-Yu Ku
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - Himisha Beltran
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - William K Kelly
- Department of Medical Oncology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Eva Corey
- Department of Urology, University of Washington, Seattle, WA, USA
| | - Maja Klose
- Institute of Neurochemistry, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Christine Bandtlow
- Institute of Neurochemistry, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Qin Liu
- Molecular and Cellular Oncogenesis Program, The Wistar Institute, Philadelphia, PA, USA
| | - Dario C Altieri
- Immunology, Microenvironment and Metastasis Program, The Wistar Institute, Philadelphia, PA, USA
| | - Edward F Plow
- Cardiovascular and Metabolic Sciences Department, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Lucia R Languino
- Prostate Cancer Discovery and Development Program, Thomas Jefferson University, Philadelphia, PA, USA.
- Department of Pharmacology, Physiology, and Cancer Biology, Thomas Jefferson University, Philadelphia, PA, USA.
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2
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Gahmberg CG, Grönholm M, Madhavan S. Regulation of Dynamic Cell Adhesion by Integrin-Integrin Crosstalk. Cells 2022; 11:cells11101685. [PMID: 35626722 PMCID: PMC9140058 DOI: 10.3390/cells11101685] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 05/11/2022] [Accepted: 05/17/2022] [Indexed: 02/07/2023] Open
Abstract
Most cells express several integrins. The integrins are able to respond to various cellular functions and needs by modifying their own activation state, but in addition by their ability to regulate each other by activation or inhibition. This crosstalk or transdominant regulation is strictly controlled. The mechanisms resulting in integrin crosstalk are incompletely understood, but they often involve intracellular signalling routes also used by other cell surface receptors. Several studies show that the integrin cytoplasmic tails bind to a number of cytoskeletal and adaptor molecules in a regulated manner. Recent work has shown that phosphorylations of integrins and key intracellular molecules are of pivotal importance in integrin-cytoplasmic interactions, and these in turn affect integrin activity and crosstalk. The integrin β-chains play a central role in regulating crosstalk. In addition to Integrin-integrin crosstalk, crosstalk may also occur between integrins and related receptors, including other adhesion receptors, growth factor and SARS-CoV-2 receptors.
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Affiliation(s)
- Carl G. Gahmberg
- Molecular and Integrative Biosciences Research Program, Faculty of Biological and Environmental Sciences, University of Helsinki, Viikinkaari 9 C, 00014 Helsinki, Finland; (M.G.); (S.M.)
- Correspondence: ; Tel.: +358-50-539-9439
| | - Mikaela Grönholm
- Molecular and Integrative Biosciences Research Program, Faculty of Biological and Environmental Sciences, University of Helsinki, Viikinkaari 9 C, 00014 Helsinki, Finland; (M.G.); (S.M.)
- Drug Research Program, Faculty of Pharmacy, University of Helsinki, Viikinkaari 9 C, 00014 Helsinki, Finland
| | - Sudarrshan Madhavan
- Molecular and Integrative Biosciences Research Program, Faculty of Biological and Environmental Sciences, University of Helsinki, Viikinkaari 9 C, 00014 Helsinki, Finland; (M.G.); (S.M.)
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3
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Gahmberg CG, Grönholm M. How integrin phosphorylations regulate cell adhesion and signaling. Trends Biochem Sci 2021; 47:265-278. [PMID: 34872819 PMCID: PMC8642147 DOI: 10.1016/j.tibs.2021.11.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 11/08/2021] [Accepted: 11/08/2021] [Indexed: 12/13/2022]
Abstract
Cell adhesion is essential for the formation of organs, cellular migration, and interaction with target cells and the extracellular matrix. Integrins are large protein α/β-chain heterodimers and form a major family of cell adhesion molecules. Recent research has dramatically increased our knowledge of how integrin phosphorylations regulate integrin activity. Phosphorylations determine the signaling complexes formed on the cytoplasmic tails, regulating downstream signaling. α-Chain phosphorylation is necessary for inducing β-chain phosphorylation in LFA-1, and the crosstalk from one integrin to another activating or inactivating its function is in part mediated by phosphorylation of β-chains. The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virus receptor angiotensin-converting enzyme 2 (ACE2) and possible integrin coreceptors may crosstalk and induce a phosphorylation switch and autophagy.
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Affiliation(s)
- Carl G Gahmberg
- Molecular and Integrative Biosciences Research Programme, University of Helsinki, Viikinkaari 9 C, 00014 Helsinki, Finland.
| | - Mikaela Grönholm
- Molecular and Integrative Biosciences Research Programme, University of Helsinki, Viikinkaari 9 C, 00014 Helsinki, Finland; Faculty of Pharmacy, University of Helsinki, Viikinkaari 5E, 00014 Helsinki, Finland
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4
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Guzy R, Redente EF. Kindlin for the Fire: Targeting Proline Synthesis to Extinguish Matrix Production in Pulmonary Fibrosis. Am J Respir Cell Mol Biol 2021; 65:4-5. [PMID: 33844940 PMCID: PMC8320124 DOI: 10.1165/rcmb.2021-0137ed] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Affiliation(s)
- Robert Guzy
- Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Elizabeth F Redente
- Department of Pediatrics, National Jewish Health, Denver, Colorado and.,Department of Medicine University of Colorado School of Medicine, Aurora, Colorado
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5
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Mészáros B, Sámano-Sánchez H, Alvarado-Valverde J, Čalyševa J, Martínez-Pérez E, Alves R, Shields DC, Kumar M, Rippmann F, Chemes LB, Gibson TJ. Short linear motif candidates in the cell entry system used by SARS-CoV-2 and their potential therapeutic implications. Sci Signal 2021; 14:eabd0334. [PMID: 33436497 PMCID: PMC7928535 DOI: 10.1126/scisignal.abd0334] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 12/10/2020] [Indexed: 12/12/2022]
Abstract
The first reported receptor for SARS-CoV-2 on host cells was the angiotensin-converting enzyme 2 (ACE2). However, the viral spike protein also has an RGD motif, suggesting that cell surface integrins may be co-receptors. We examined the sequences of ACE2 and integrins with the Eukaryotic Linear Motif (ELM) resource and identified candidate short linear motifs (SLiMs) in their short, unstructured, cytosolic tails with potential roles in endocytosis, membrane dynamics, autophagy, cytoskeleton, and cell signaling. These SLiM candidates are highly conserved in vertebrates and may interact with the μ2 subunit of the endocytosis-associated AP2 adaptor complex, as well as with various protein domains (namely, I-BAR, LC3, PDZ, PTB, and SH2) found in human signaling and regulatory proteins. Several motifs overlap in the tail sequences, suggesting that they may act as molecular switches, such as in response to tyrosine phosphorylation status. Candidate LC3-interacting region (LIR) motifs are present in the tails of integrin β3 and ACE2, suggesting that these proteins could directly recruit autophagy components. Our findings identify several molecular links and testable hypotheses that could uncover mechanisms of SARS-CoV-2 attachment, entry, and replication against which it may be possible to develop host-directed therapies that dampen viral infection and disease progression. Several of these SLiMs have now been validated to mediate the predicted peptide interactions.
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Affiliation(s)
- Bálint Mészáros
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg 69117, Germany.
| | - Hugo Sámano-Sánchez
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg 69117, Germany
| | - Jesús Alvarado-Valverde
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg 69117, Germany
- Collaboration for joint PhD degree between EMBL and Heidelberg University, Faculty of Biosciences
| | - Jelena Čalyševa
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg 69117, Germany
- Collaboration for joint PhD degree between EMBL and Heidelberg University, Faculty of Biosciences
| | - Elizabeth Martínez-Pérez
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg 69117, Germany
- Laboratorio de bioinformática estructural, Fundación Instituto Leloir, C1405BWE Buenos Aires, Argentina
| | - Renato Alves
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg 69117, Germany
| | - Denis C Shields
- School of Medicine, University College Dublin, Dublin 4, Ireland
| | - Manjeet Kumar
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg 69117, Germany.
| | - Friedrich Rippmann
- Computational Chemistry & Biology, Merck KGaA, Frankfurter Str. 250, 64293 Darmstadt, Germany
| | - Lucía B Chemes
- Instituto de Investigaciones Biotecnológicas "Dr. Rodolfo A. Ugalde", IIB-UNSAM, IIBIO-CONICET, Universidad Nacional de San Martín, CP1650 San Martín, Buenos Aires, Argentina.
| | - Toby J Gibson
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg 69117, Germany.
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6
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Mechanosensing dysregulation in the fibroblast: A hallmark of the aging heart. Ageing Res Rev 2020; 63:101150. [PMID: 32846223 DOI: 10.1016/j.arr.2020.101150] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 08/03/2020] [Accepted: 08/14/2020] [Indexed: 12/16/2022]
Abstract
The myofibroblast is a specialized fibroblast that expresses α-smooth muscle actin (α-SMA) and participates in wound contraction and fibrosis. The fibroblast to myofibroblast transition depends on chemical and mechanical signals. A fibroblast senses the changes in the environment (extracellular matrix (ECM)) and transduces these changes to the cytoskeleton and the nucleus, resulting in activation or inhibition of α-SMA transcription in a process called mechanosensing. A stiff matrix greatly facilitates the transition from fibroblast to myofibroblast, and although the aging heart is much stiffer than the young one, the aging fibroblast has difficulties in transitioning into the contractile phenotype. This suggests that the events occurring downstream of the matrix, such as activation or changes in expression levels of various proteins participating in mechanotransduction can negatively alter the ability of the aging fibroblast to become a myofibroblast. In this review, we will discuss in detail the changes in ECM, receptors (integrin or non-integrin), focal adhesions, cytoskeleton, and transcription factors involved in mechanosensing that occur with aging.
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7
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Zhang Y, Lin Z, Fang Y, Wu J. Prediction of Catch-Slip Bond Transition of Kindlin2/β3 Integrin via Steered Molecular Dynamics Simulation. J Chem Inf Model 2020; 60:5132-5141. [PMID: 32877187 DOI: 10.1021/acs.jcim.0c00837] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Kindlin2 is believed to be crucial in integrin activation, which mediates the cell-extracellular matrix adhesion and signaling, but the mechanoregulation of the interaction between Kindlin2 and integrin remains unclear. Here, we performed the so-called "ramp-clamp" steered molecular dynamics simulation on the crystal structure of Kindlin2 bound with β3 integrin. The results showed that the complex had a better mechanical strength for its rupture force of about 200 pN under pulling with the velocity of 1 Å/ns, and was mechanostable for its conformational conservation under constant tensile force (≤60 pN). The catch-slip bond transition with a force threshold of 20 pN was demonstrated by the dissociation probability, the interaction energy, the interface H-bond number, and the force-induced allostery of the complex. This study might provide a novel insight into force-dependent Kindlin2/integrin-related signaling and its structural basis in cellular processes as well as a rational SMD-based computer strategy for predicting the structure-function relationship of the stretched complex.
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Affiliation(s)
- Yan Zhang
- Institute of Biomechanics, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
| | - Zhanyi Lin
- Department of Cardiology, Institute of Geriatric Medicine, Guangdong Academy of Medical Sciences, Guangdong General Hospital, Guangzhou 510080, China
| | - Ying Fang
- Institute of Biomechanics, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
| | - Jianhua Wu
- Institute of Biomechanics, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
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8
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Abstract
Integrins are heterodimeric cell surface receptors ensuring the mechanical connection between cells and the extracellular matrix. In addition to the anchorage of cells to the extracellular matrix, these receptors have critical functions in intracellular signaling, but are also taking center stage in many physiological and pathological conditions. In this review, we provide some historical, structural, and physiological notes so that the diverse functions of these receptors can be appreciated and put into the context of the emerging field of mechanobiology. We propose that the exciting journey of the exploration of these receptors will continue for at least another new generation of researchers.
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Affiliation(s)
- Michael Bachmann
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire , Geneva , Switzerland ; and Faculty of Medicine and Health Technology, Tampere University, and Fimlab Laboratories , Tampere , Finland
| | - Sampo Kukkurainen
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire , Geneva , Switzerland ; and Faculty of Medicine and Health Technology, Tampere University, and Fimlab Laboratories , Tampere , Finland
| | - Vesa P Hytönen
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire , Geneva , Switzerland ; and Faculty of Medicine and Health Technology, Tampere University, and Fimlab Laboratories , Tampere , Finland
| | - Bernhard Wehrle-Haller
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire , Geneva , Switzerland ; and Faculty of Medicine and Health Technology, Tampere University, and Fimlab Laboratories , Tampere , Finland
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9
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Huang J, Li X, Shi X, Zhu M, Wang J, Huang S, Huang X, Wang H, Li L, Deng H, Zhou Y, Mao J, Long Z, Ma Z, Ye W, Pan J, Xi X, Jin J. Platelet integrin αIIbβ3: signal transduction, regulation, and its therapeutic targeting. J Hematol Oncol 2019; 12:26. [PMID: 30845955 PMCID: PMC6407232 DOI: 10.1186/s13045-019-0709-6] [Citation(s) in RCA: 179] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Accepted: 02/21/2019] [Indexed: 12/18/2022] Open
Abstract
Integrins are a family of transmembrane glycoprotein signaling receptors that can transmit bioinformation bidirectionally across the plasma membrane. Integrin αIIbβ3 is expressed at a high level in platelets and their progenitors, where it plays a central role in platelet functions, hemostasis, and arterial thrombosis. Integrin αIIbβ3 also participates in cancer progression, such as tumor cell proliferation and metastasis. In resting platelets, integrin αIIbβ3 adopts an inactive conformation. Upon agonist stimulation, the transduction of inside-out signals leads integrin αIIbβ3 to switch from a low- to high-affinity state for fibrinogen and other ligands. Ligand binding causes integrin clustering and subsequently promotes outside-in signaling, which initiates and amplifies a range of cellular events to drive essential platelet functions such as spreading, aggregation, clot retraction, and thrombus consolidation. Regulation of the bidirectional signaling of integrin αIIbβ3 requires the involvement of numerous interacting proteins, which associate with the cytoplasmic tails of αIIbβ3 in particular. Integrin αIIbβ3 and its signaling pathways are considered promising targets for antithrombotic therapy. This review describes the bidirectional signal transduction of integrin αIIbβ3 in platelets, as well as the proteins responsible for its regulation and therapeutic agents that target integrin αIIbβ3 and its signaling pathways.
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Affiliation(s)
- Jiansong Huang
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.,Key Laboratory of Hematologic Malignancies, Diagnosis and Treatment, Hangzhou, Zhejiang, China.,Institute of Hematology, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Xia Li
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.,Key Laboratory of Hematologic Malignancies, Diagnosis and Treatment, Hangzhou, Zhejiang, China.,Institute of Hematology, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Xiaofeng Shi
- Department of Hematology, Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu, China
| | - Mark Zhu
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Jinghan Wang
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.,Key Laboratory of Hematologic Malignancies, Diagnosis and Treatment, Hangzhou, Zhejiang, China.,Institute of Hematology, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Shujuan Huang
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.,Key Laboratory of Hematologic Malignancies, Diagnosis and Treatment, Hangzhou, Zhejiang, China.,Institute of Hematology, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Xin Huang
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.,Key Laboratory of Hematologic Malignancies, Diagnosis and Treatment, Hangzhou, Zhejiang, China.,Institute of Hematology, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Huafeng Wang
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.,Key Laboratory of Hematologic Malignancies, Diagnosis and Treatment, Hangzhou, Zhejiang, China.,Institute of Hematology, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.,Department of Hematological Malignancies Translational Science, Gehr Family Center for Leukemia Research, Hematologic Malignancies and Stem Cell Transplantation Institute, Beckman Research Institute, City of Hope Medical Center, Duarte, CA, 91010, USA
| | - Ling Li
- Department of Hematological Malignancies Translational Science, Gehr Family Center for Leukemia Research, Hematologic Malignancies and Stem Cell Transplantation Institute, Beckman Research Institute, City of Hope Medical Center, Duarte, CA, 91010, USA
| | - Huan Deng
- Department of Pathology, The Fourth Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Yulan Zhou
- Department of Hematology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Jianhua Mao
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Sino-French Research Centre for Life Sciences and Genomics, Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhangbiao Long
- Department of Hematology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Zhixin Ma
- Clinical Prenatal Diagnosis Center, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Wenle Ye
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.,Key Laboratory of Hematologic Malignancies, Diagnosis and Treatment, Hangzhou, Zhejiang, China.,Institute of Hematology, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Jiajia Pan
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.,Key Laboratory of Hematologic Malignancies, Diagnosis and Treatment, Hangzhou, Zhejiang, China.,Institute of Hematology, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Xiaodong Xi
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China. .,Sino-French Research Centre for Life Sciences and Genomics, Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
| | - Jie Jin
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China. .,Key Laboratory of Hematologic Malignancies, Diagnosis and Treatment, Hangzhou, Zhejiang, China. .,Institute of Hematology, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.
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10
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Morikis VA, Simon SI. Neutrophil Mechanosignaling Promotes Integrin Engagement With Endothelial Cells and Motility Within Inflamed Vessels. Front Immunol 2018; 9:2774. [PMID: 30546362 PMCID: PMC6279920 DOI: 10.3389/fimmu.2018.02774] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 11/12/2018] [Indexed: 12/24/2022] Open
Abstract
Neutrophils are the most motile of mammalian cells, a feature that enables them to protect the host against the rapid spread of pathogens from tissue into the circulatory system. A critical process is the recruitment of neutrophils to inflamed endothelium within post-capillary venules. This occurs through cooperation between at least four families of adhesion molecules and G-protein coupled signaling receptors. These adhesion molecules convert the drag force induced by blood flow acting on the cell surface into bond tension that resists detachment. A common feature of selectin-glycoprotein tethering and integrin-ICAM bond formation is the mechanics by which force acting on these specific receptor-ligand pairs influences their longevity, strength, and topographic organization on the plasma membrane. Another distinctly mechanical aspect of neutrophil guidance is the capacity of adhesive bonds to convert external mechanical force into internal biochemical signals through the transmission of force from the outside-in at focal sites of adhesive traction on inflamed endothelium. Within this region of the plasma membrane, we denote the inflammatory synapse, Ca2+ release, and intracellular signaling provide directional cues that guide actin assembly and myosin driven motive force. This review provides an overview of how bond formation and outside-in signaling controls neutrophil recruitment and migration relative to the hydrodynamic shear force of blood flow.
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Affiliation(s)
- Vasilios A Morikis
- Simon Lab, Department of Biomedical Engineering, University of California, Davis, Davis, CA, United States
| | - Scott I Simon
- Simon Lab, Department of Biomedical Engineering, University of California, Davis, Davis, CA, United States
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11
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De Mets R, Wang I, Balland M, Oddou C, Moreau P, Fourcade B, Albiges-Rizo C, Delon A, Destaing O. Cellular tension encodes local Src-dependent differential β 1 and β 3 integrin mobility. Mol Biol Cell 2018; 30:181-190. [PMID: 30462575 PMCID: PMC6589565 DOI: 10.1091/mbc.e18-04-0253] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Integrins are transmembrane receptors that have a pivotal role in mechanotransduction processes by connecting the extracellular matrix to the cytoskeleton. Although it is well established that integrin activation/inhibition cycles are due to highly dynamic interactions, whether integrin mobility depends on local tension and cytoskeletal organization remains surprisingly unclear. Using an original approach combining micropatterning on glass substrates to induce standardized local mechanical constraints within a single cell with temporal image correlation spectroscopy, we measured the mechanosensitive response of integrin mobility at the whole cell level and in adhesion sites under different mechanical constraints. Contrary to β1 integrins, high tension increases β3 integrin residence time in adhesive regions. Chimeric integrins and structure–function studies revealed that the ability of β3 integrins to specifically sense local tensional organization is mostly encoded by its cytoplasmic domain and is regulated by tuning the affinity of its NPXY domains through phosphorylation by Src family kinases.
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Affiliation(s)
- Richard De Mets
- Laboratoire interdisciplinaire de Physique, Université Grenoble Alpes et CNRS, 38402 Grenoble, Cedex, France
| | - Irene Wang
- Laboratoire interdisciplinaire de Physique, Université Grenoble Alpes et CNRS, 38402 Grenoble, Cedex, France
| | - Martial Balland
- Laboratoire interdisciplinaire de Physique, Université Grenoble Alpes et CNRS, 38402 Grenoble, Cedex, France
| | - Christiane Oddou
- Institut Albert Bonniot, Université Joseph Fourier, INSERM U823, CNRS ERL 5284, Grenoble Alpessite Santé, F38042 Grenoble Cedex 09, France
| | - Philippe Moreau
- Laboratoire interdisciplinaire de Physique, Université Grenoble Alpes et CNRS, 38402 Grenoble, Cedex, France
| | - Bertrand Fourcade
- Laboratoire interdisciplinaire de Physique, Université Grenoble Alpes et CNRS, 38402 Grenoble, Cedex, France
| | - Corinne Albiges-Rizo
- Institut Albert Bonniot, Université Joseph Fourier, INSERM U823, CNRS ERL 5284, Grenoble Alpessite Santé, F38042 Grenoble Cedex 09, France
| | - Antoine Delon
- Laboratoire interdisciplinaire de Physique, Université Grenoble Alpes et CNRS, 38402 Grenoble, Cedex, France
| | - Olivier Destaing
- Institut Albert Bonniot, Université Joseph Fourier, INSERM U823, CNRS ERL 5284, Grenoble Alpessite Santé, F38042 Grenoble Cedex 09, France
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12
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Cao Z, Suo X, Chu Y, Xu Z, Bao Y, Miao C, Deng W, Mao K, Gao J, Xu Z, Ma YQ. Peptides derived from the integrin β cytoplasmic tails inhibit angiogenesis. Cell Commun Signal 2018; 16:38. [PMID: 29970081 PMCID: PMC6029062 DOI: 10.1186/s12964-018-0248-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 06/19/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Integrins are essential regulators of angiogenesis. However, the antiangiogenic potential of peptides derived from the integrin cytoplasmic tails (CT) remains mostly undetermined. METHODS Here we designed a panel of membrane-penetrating peptides (termed as mβCTPs), each comprising a C-terminal NxxY motif from one of the conserved integrin β CTs, and evaluated their antiangiogenic ability using both in vitro and in vivo approaches. RESULTS We found that mβ3CTP, mβ5CTP and mβ6CTP, derived respectively from the integrin β3, β5 and β6 CTs, but not others, exhibit antiangiogenic ability. Interestingly, we observed that the integrin β3, β5 and β6 CTs but not others are able to interact with β3-endonexin. In addition, the antiangiogenic core in mβ3CTP is identical to a previously identified β3-endonexin binding region in the integrin β3 CT, indicating that the antiangiogenic mβCTPs may function via their binding to β3-endonexin. Consistently, knockdown of endogenous β3-endonexin in HUVECs significantly suppresses tube formation, suggesting that β3-endonexin is proangiogenic. However, neither treatment with the antiangiogenic mβCTPs nor knockdown of endogenous β3-endonexin affects integrin-mediated HUVEC adhesion and migration, indicating that their antiangiogenic effect may not rely on directly regulating integrin activity. Importantly, both treatment with the antiangiogenic mβCTPs and knockdown of endogenous β3-endonexin in HUVECs inhibit VEGF expression and cell proliferation, thereby providing mechanistic explanations for the functional consequences. CONCLUSION Our results suggest that the antiangiogenic mβCTPs can interact with β3-endonexin in vascular endothelial cells and suppress its function in regulating VEGF expression and cell proliferation, thus disclosing a unique pathway that may be useful for developing novel antiangiogenic strategies.
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Affiliation(s)
- Zhongyuan Cao
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, China.,School of Life Sciences, Shanghai University, Shanghai, China
| | - Xinfeng Suo
- School of Life Sciences, Shanghai University, Shanghai, China
| | - Yudan Chu
- School of Life Sciences, Shanghai University, Shanghai, China
| | - Zhou Xu
- School of Life Sciences, Shanghai University, Shanghai, China
| | - Yun Bao
- School of Life Sciences, Shanghai University, Shanghai, China
| | - Chunxiao Miao
- School of Life Sciences, Shanghai University, Shanghai, China
| | - Wenfeng Deng
- School of Life Sciences, Shanghai University, Shanghai, China
| | - Kaijun Mao
- School of Life Sciences, Shanghai University, Shanghai, China
| | - Juan Gao
- School of Life Sciences, Shanghai University, Shanghai, China
| | - Zhen Xu
- School of Life Sciences, Shanghai University, Shanghai, China. .,Blood Research Institute, Blood Center of Wisconsin, part of Versiti, 8727 Watertown Plank Rd, Milwaukee, WI, 53226, USA.
| | - Yan-Qing Ma
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, China. .,School of Life Sciences, Shanghai University, Shanghai, China. .,Blood Research Institute, Blood Center of Wisconsin, part of Versiti, 8727 Watertown Plank Rd, Milwaukee, WI, 53226, USA.
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13
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Seetharaman S, Etienne-Manneville S. Integrin diversity brings specificity in mechanotransduction. Biol Cell 2018; 110:49-64. [DOI: 10.1111/boc.201700060] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 01/08/2018] [Indexed: 12/29/2022]
Affiliation(s)
- Shailaja Seetharaman
- Institut Pasteur Paris CNRS UMR3691; Cell Polarity; Migration and Cancer Unit; Equipe Labellisée Ligue Contre le Cancer; Paris Cedex 15 France
- Université Paris Descartes, Sorbonne Paris Cité; Paris 75006 France
| | - Sandrine Etienne-Manneville
- Institut Pasteur Paris CNRS UMR3691; Cell Polarity; Migration and Cancer Unit; Equipe Labellisée Ligue Contre le Cancer; Paris Cedex 15 France
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14
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Structural basis of kindlin-mediated integrin recognition and activation. Proc Natl Acad Sci U S A 2017; 114:9349-9354. [PMID: 28739949 DOI: 10.1073/pnas.1703064114] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Kindlins and talins are integrin-binding proteins that are critically involved in integrin activation, an essential process for many fundamental cellular activities including cell-matrix adhesion, migration, and proliferation. As FERM-domain-containing proteins, talins and kindlins, respectively, bind different regions of β-integrin cytoplasmic tails. However, compared with the extensively studied talin, little is known about how kindlins specifically interact with integrins and synergistically enhance their activation by talins. Here, we determined crystal structures of kindlin2 in the apo-form and the β1- and β3-integrin bound forms. The apo-structure shows an overall architecture distinct from talins. The complex structures reveal a unique integrin recognition mode of kindlins, which combines two binding motifs to provide specificity that is essential for integrin activation and signaling. Strikingly, our structures uncover an unexpected dimer formation of kindlins. Interrupting dimer formation impairs kindlin-mediated integrin activation. Collectively, the structural, biochemical, and cellular results provide mechanistic explanations that account for the effects of kindlins on integrin activation as well as for how kindlin mutations found in patients with Kindler syndrome and leukocyte-adhesion deficiency may impact integrin-mediated processes.
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15
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Zhang Z, Mu Y, Veevers J, Peter AK, Manso AM, Bradford WH, Dalton ND, Peterson KL, Knowlton KU, Ross RS, Zhou X, Chen J. Postnatal Loss of Kindlin-2 Leads to Progressive Heart Failure. Circ Heart Fail 2017; 9:CIRCHEARTFAILURE.116.003129. [PMID: 27502369 DOI: 10.1161/circheartfailure.116.003129] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 06/24/2016] [Indexed: 01/10/2023]
Abstract
BACKGROUND The striated muscle costamere, a multiprotein complex at the boundary between the sarcomere and the sarcolemma, plays an integral role in maintaining striated muscle structure and function. Multiple costamere-associated proteins, such as integrins and integrin-interacting proteins, have been identified and shown to play an increasingly important role in the pathogenesis of human cardiomyopathy. Kindlin-2 is an adaptor protein that binds to the integrin β cytoplasmic tail to promote integrin activation. Genetic deficiency of Kindlin-2 results in embryonic lethality, and knockdown of the Kindlin-2 homolog in Caenorhabditis elegans and Danio rerio suggests that it has an essential role in integrin function and normal muscle structure and function. The precise role of Kindlin-2 in the mammalian cardiac myocyte remains to be determined. METHODS AND RESULTS The current studies were designed to investigate the role of Kindlin-2 in the mammalian heart. We generated a series of cardiac myocyte-specific Kindlin-2 knockout mice with excision of the Kindlin-2 gene in either developing or adult cardiac myocytes. We found that mice lacking Kindlin-2 in the early developing heart are embryonic lethal. We demonstrate that deletion of Kindlin-2 at late gestation or in adult cardiac myocytes resulted in heart failure and premature death, which were associated with enlargement of the heart and extensive fibrosis. In addition, integrin β1D protein expression was significantly downregulated in the adult heart. CONCLUSIONS Kindlin-2 is required to maintain integrin β1D protein stability. Postnatal loss of Kindlin-2 from cardiac myocytes leads to progressive heart failure, showing the importance of costameric proteins like Kindlin-2 for homeostasis of normal heart function.
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Affiliation(s)
- Zhiyuan Zhang
- From the Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China (Z.Z., X.Z.); Department of Medicine-Cardiology, University of California San Diego, La Jolla (Z.Z., Y.M., J.V., A.K.P., A.M.M., W.H.B., N.D.D., K.L.P., K.U.K., R.S.R., J.C.); Veterans Administration Healthcare, Medicine/Cardiology, San Diego, CA (A.M.M., R.S.R.)
| | - Yongxin Mu
- From the Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China (Z.Z., X.Z.); Department of Medicine-Cardiology, University of California San Diego, La Jolla (Z.Z., Y.M., J.V., A.K.P., A.M.M., W.H.B., N.D.D., K.L.P., K.U.K., R.S.R., J.C.); Veterans Administration Healthcare, Medicine/Cardiology, San Diego, CA (A.M.M., R.S.R.)
| | - Jennifer Veevers
- From the Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China (Z.Z., X.Z.); Department of Medicine-Cardiology, University of California San Diego, La Jolla (Z.Z., Y.M., J.V., A.K.P., A.M.M., W.H.B., N.D.D., K.L.P., K.U.K., R.S.R., J.C.); Veterans Administration Healthcare, Medicine/Cardiology, San Diego, CA (A.M.M., R.S.R.)
| | - Angela K Peter
- From the Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China (Z.Z., X.Z.); Department of Medicine-Cardiology, University of California San Diego, La Jolla (Z.Z., Y.M., J.V., A.K.P., A.M.M., W.H.B., N.D.D., K.L.P., K.U.K., R.S.R., J.C.); Veterans Administration Healthcare, Medicine/Cardiology, San Diego, CA (A.M.M., R.S.R.)
| | - Ana Maria Manso
- From the Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China (Z.Z., X.Z.); Department of Medicine-Cardiology, University of California San Diego, La Jolla (Z.Z., Y.M., J.V., A.K.P., A.M.M., W.H.B., N.D.D., K.L.P., K.U.K., R.S.R., J.C.); Veterans Administration Healthcare, Medicine/Cardiology, San Diego, CA (A.M.M., R.S.R.)
| | - William H Bradford
- From the Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China (Z.Z., X.Z.); Department of Medicine-Cardiology, University of California San Diego, La Jolla (Z.Z., Y.M., J.V., A.K.P., A.M.M., W.H.B., N.D.D., K.L.P., K.U.K., R.S.R., J.C.); Veterans Administration Healthcare, Medicine/Cardiology, San Diego, CA (A.M.M., R.S.R.)
| | - Nancy D Dalton
- From the Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China (Z.Z., X.Z.); Department of Medicine-Cardiology, University of California San Diego, La Jolla (Z.Z., Y.M., J.V., A.K.P., A.M.M., W.H.B., N.D.D., K.L.P., K.U.K., R.S.R., J.C.); Veterans Administration Healthcare, Medicine/Cardiology, San Diego, CA (A.M.M., R.S.R.)
| | - Kirk L Peterson
- From the Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China (Z.Z., X.Z.); Department of Medicine-Cardiology, University of California San Diego, La Jolla (Z.Z., Y.M., J.V., A.K.P., A.M.M., W.H.B., N.D.D., K.L.P., K.U.K., R.S.R., J.C.); Veterans Administration Healthcare, Medicine/Cardiology, San Diego, CA (A.M.M., R.S.R.)
| | - Kirk U Knowlton
- From the Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China (Z.Z., X.Z.); Department of Medicine-Cardiology, University of California San Diego, La Jolla (Z.Z., Y.M., J.V., A.K.P., A.M.M., W.H.B., N.D.D., K.L.P., K.U.K., R.S.R., J.C.); Veterans Administration Healthcare, Medicine/Cardiology, San Diego, CA (A.M.M., R.S.R.)
| | - Robert S Ross
- From the Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China (Z.Z., X.Z.); Department of Medicine-Cardiology, University of California San Diego, La Jolla (Z.Z., Y.M., J.V., A.K.P., A.M.M., W.H.B., N.D.D., K.L.P., K.U.K., R.S.R., J.C.); Veterans Administration Healthcare, Medicine/Cardiology, San Diego, CA (A.M.M., R.S.R.)
| | - Xinmin Zhou
- From the Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China (Z.Z., X.Z.); Department of Medicine-Cardiology, University of California San Diego, La Jolla (Z.Z., Y.M., J.V., A.K.P., A.M.M., W.H.B., N.D.D., K.L.P., K.U.K., R.S.R., J.C.); Veterans Administration Healthcare, Medicine/Cardiology, San Diego, CA (A.M.M., R.S.R.)
| | - Ju Chen
- From the Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China (Z.Z., X.Z.); Department of Medicine-Cardiology, University of California San Diego, La Jolla (Z.Z., Y.M., J.V., A.K.P., A.M.M., W.H.B., N.D.D., K.L.P., K.U.K., R.S.R., J.C.); Veterans Administration Healthcare, Medicine/Cardiology, San Diego, CA (A.M.M., R.S.R.).
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16
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Hirbawi J, Bialkowska K, Bledzka KM, Liu J, Fukuda K, Qin J, Plow EF. The extreme C-terminal region of kindlin-2 is critical to its regulation of integrin activation. J Biol Chem 2017; 292:14258-14269. [PMID: 28652408 DOI: 10.1074/jbc.m117.776195] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 06/17/2017] [Indexed: 12/25/2022] Open
Abstract
Kindlin-2 (K2), a 4.1R-ezrin-radixin-moesin (FERM) domain adaptor protein, mediates numerous cellular responses, including integrin activation. The C-terminal 15-amino acid sequence of K2 is remarkably conserved across species but is absent in canonical FERM proteins, including talin. In CHO cells expressing integrin αIIbβ3, co-expression of K2 with talin head domain resulted in robust integrin activation, but this co-activation was lost after deletion of as few as seven amino acids from the K2 C terminus. This dependence on the C terminus was also observed in activation of endogenous αIIbβ3 in human erythroleukemia (HEL) cells and β1 integrin activation in macrophage-like RAW264.1 cells. Kindlin-1 (K1) exhibited a similar dependence on its C terminus for integrin activation. Expression of the K2 C terminus as an extension of membrane-anchored P-selectin glycoprotein ligand-1 (PSGL-1) inhibited integrin-dependent cell spreading. Deletion of the K2 C terminus did not affect its binding to the integrin β3 cytoplasmic tail, but combined biochemical and NMR analyses indicated that it can insert into the F2 subdomain. We suggest that this insertion determines the topology of the K2 FERM domain, and its deletion may affect the positioning of the membrane-binding functions of the F2 subdomain and the integrin-binding properties of its F3 subdomain. Free C-terminal peptide can still bind to K2 and displace the endogenous K2 C terminus but may not restore the conformation needed for integrin co-activation. Our findings indicate that the extreme C terminus of K2 is essential for integrin co-activation and highlight the importance of an atypical architecture of the K2 FERM domain in regulating integrin activation.
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Affiliation(s)
- Jamila Hirbawi
- From the Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195
| | - Katarzyna Bialkowska
- From the Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195
| | - Kamila M Bledzka
- From the Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195
| | - Jianmin Liu
- From the Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195
| | - Koichi Fukuda
- From the Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195
| | - Jun Qin
- From the Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195
| | - Edward F Plow
- From the Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195.
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17
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Kindlin-2 Modulates the Survival, Differentiation, and Migration of Induced Pluripotent Cell-Derived Mesenchymal Stromal Cells. Stem Cells Int 2017; 2017:7316354. [PMID: 28163724 PMCID: PMC5253493 DOI: 10.1155/2017/7316354] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 11/24/2016] [Accepted: 12/12/2016] [Indexed: 01/21/2023] Open
Abstract
Kindlin-2 is a multidomain intracellular protein that can be recruited to β-integrin domains to activate signaling, initiate transcriptional programs, and bind to E-cadherin. To explore its involvement in cell fate decisions in mesenchymal cells, we studied the effects of Kindlin-2 modification (overexpression/knockdown) in induced pluripotent cell-derived mesenchymal stromal cells (iPSC-MSCs). Kindlin-2 overexpression resulted in increased proliferation and reduced apoptosis of iPSC-MSCs, as well as inhibition of their differentiation towards osteocytes, adipocytes, and chondrocytes. In contrast, siRNA-mediated Kindlin-2 knockdown induced increased apoptosis and increased differentiation response in iPSC-MSCs. The ability of iPSC-MSCs to adhere to VCAM-1/SDF-1α under shear stress and to migrate in a wound scratch assay was significantly increased after Kindlin-2 overexpression. In contrast, inhibition of mixed lymphocyte reaction (MLR) was generally independent of Kindlin-2 modulation in iPSC-MSCs, except for decreased production of interleukin-2 (IL-2) after Kindlin-2 overexpression in iPS-MSCs. Thus, Kindlin-2 upregulates survival, proliferation, stemness, and migration potential in iPSC-MSCs and may therefore be beneficial in optimizing performance of iPSC-MSC in therapies.
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18
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Milloud R, Destaing O, de Mets R, Bourrin-Reynard I, Oddou C, Delon A, Wang I, Albigès-Rizo C, Balland M. αvβ3 integrins negatively regulate cellular forces by phosphorylation of its distal NPXY site. Biol Cell 2016; 109:127-137. [PMID: 27990663 DOI: 10.1111/boc.201600041] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 11/02/2016] [Accepted: 11/03/2016] [Indexed: 12/22/2022]
Abstract
BACKGROUND INFORMATION Integrins are key receptors that allow cells to sense and respond to their mechanical environment. Although they bind the same ligand, β1 and β3 integrins have distinct and cooperative roles in mechanotransduction. RESULTS Using traction force microscopy on unconstrained cells, we show that deleting β3 causes traction forces to increase, whereas the deletion of β1 integrin results in a strong decrease of contractile forces. Consistently, loss of β3 integrin also induces an increase in β1 integrin activation. Using a genetic approach, we identified the phosphorylation of the distal NPXY domain as an essential process for β3 integrin to be able to modulate traction forces. Loss of β3 integrins also impacted cell shape and the spatial distribution of traction forces, by causing forces to be generated closer to the cell edge, and the cell shape. CONCLUSIONS Our results emphasize the role of β3 integrin in spatial distribution of cellular forces. We speculate that, by modulating its affinity with kindlin, β3 integrins may be able to locate near the cell edge where it can control β1 integrin activation and clustering. SIGNIFICANCE Tensional homeostasis at the single cell level is performed by the ability of β3 adhesions to negatively regulate the activation degree and spatial localization of β1 integrins. By combining genetic approaches and new tools to analyze traction distribution and cell morphology on a population of cells we were able to identify the molecular partners involved in cellular forces regulation.
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Affiliation(s)
- Rachel Milloud
- Laboratoire Interdisciplinaire de Physique, UMR CNRS 5588, Université Grenoble Alpes, Grenoble, France
| | - Olivier Destaing
- Institute for Advanced Biosciences, Institut Albert Bonniot, Inserm U1209, CNRS 5309, Dynamique de l'adhérence cellulaire et de la différenciation, Université Grenoble Alpes, Grenoble, France
| | - Richard de Mets
- Laboratoire Interdisciplinaire de Physique, UMR CNRS 5588, Université Grenoble Alpes, Grenoble, France
| | - Ingrid Bourrin-Reynard
- Institute for Advanced Biosciences, Institut Albert Bonniot, Inserm U1209, CNRS 5309, Dynamique de l'adhérence cellulaire et de la différenciation, Université Grenoble Alpes, Grenoble, France
| | - Christiane Oddou
- Institute for Advanced Biosciences, Institut Albert Bonniot, Inserm U1209, CNRS 5309, Dynamique de l'adhérence cellulaire et de la différenciation, Université Grenoble Alpes, Grenoble, France
| | - Antoine Delon
- Laboratoire Interdisciplinaire de Physique, UMR CNRS 5588, Université Grenoble Alpes, Grenoble, France
| | - Irène Wang
- Laboratoire Interdisciplinaire de Physique, UMR CNRS 5588, Université Grenoble Alpes, Grenoble, France
| | - Corinne Albigès-Rizo
- Institute for Advanced Biosciences, Institut Albert Bonniot, Inserm U1209, CNRS 5309, Dynamique de l'adhérence cellulaire et de la différenciation, Université Grenoble Alpes, Grenoble, France
| | - Martial Balland
- Laboratoire Interdisciplinaire de Physique, UMR CNRS 5588, Université Grenoble Alpes, Grenoble, France
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19
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Shi X, Yang J, Cui X, Huang J, Long Z, Zhou Y, Liu P, Tao L, Ruan Z, Xiao B, Zhang W, Li D, Dai K, Mao J, Xi X. Functional Effect of the Mutations Similar to the Cleavage during Platelet Activation at Integrin β3 Cytoplasmic Tail when Expressed in Mouse Platelets. PLoS One 2016; 11:e0166136. [PMID: 27851790 PMCID: PMC5112943 DOI: 10.1371/journal.pone.0166136] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Accepted: 10/24/2016] [Indexed: 12/31/2022] Open
Abstract
Previous studies in Chinese hamster ovary cells showed that truncational mutations of β3 at sites of F754 and Y759 mimicking calpain cleavage regulate integrin signaling. The roles of the sequence from F754 to C-terminus and the conservative N756ITY759 motif in platelet function have yet to be elaborated. Mice expressing β3 with F754 and Y759 truncations, or NITY deletion (β3-ΔTNITYRGT, β3-ΔRGT, or β3-ΔNITY) were established through transplanting the homozygous β3-deficient mouse bone marrow cells infected by the GFP tagged MSCV MigR1 retroviral vector encoding different β3 mutants into lethally radiated wild-type mice. The platelets were harvested for soluble fibrinogen binding and platelet spreading on immobilized fibrinogen. Platelet adhesion on fibrinogen- and collagen-coated surface under flow was also tested to assess the ability of the platelets to resist hydrodynamic drag forces. Data showed a drastic inhibition of the β3-ΔTNITYRGT platelets to bind soluble fibrinogen and spread on immobilized fibrinogen in contrast to a partially impaired fibrinogen binding and an almost unaffected spreading exhibited in the β3-ΔNITY platelets. Behaviors of the β3-ΔRGT platelets were consistent with the previous observations in the β3-ΔRGT knock-in platelets. The adhesion impairment of platelets with the β3 mutants under flow was in different orders of magnitude shown as: β3-ΔTNITYRGT>β3-ΔRGT>β3-ΔNITY to fibrinogen-coated surface, and β3-ΔTNITYRGT>β3-ΔNITY>β3-ΔRGT to collagen-coated surface. To evaluate the interaction of the β3 mutants with signaling molecules, GST pull-down and immunofluorescent assays were performed. Results showed that β3-ΔRGT interacted with kindlin but not c-Src, β3-ΔNITY interacted with c-Src but not kindlin, while β3-ΔTNITYRGT did not interact with both proteins. This study provided evidence in platelets at both static and flow conditions that the calpain cleavage-related sequences of integrin β3, i.e. T755NITYRGT762, R760GT762, and N756ITY759 participate in bidirectional, outside-in, and inside-out signaling, respectively and the association of c-Src or kindlin with β3 integrin may regulate these processes.
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Affiliation(s)
- Xiaofeng Shi
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Sino-French Research Center for Life Sciences and Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
- Department of Hematology, Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Jichun Yang
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Sino-French Research Center for Life Sciences and Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Xiongying Cui
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Sino-French Research Center for Life Sciences and Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Jiansong Huang
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Sino-French Research Center for Life Sciences and Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
- Department of Hematology, Institute of Hematology, the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Zhangbiao Long
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Sino-French Research Center for Life Sciences and Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Yulan Zhou
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Sino-French Research Center for Life Sciences and Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Ping Liu
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Sino-French Research Center for Life Sciences and Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Lanlan Tao
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Sino-French Research Center for Life Sciences and Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Zheng Ruan
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Sino-French Research Center for Life Sciences and Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Bing Xiao
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Sino-French Research Center for Life Sciences and Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Wei Zhang
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Sino-French Research Center for Life Sciences and Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Dongya Li
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Sino-French Research Center for Life Sciences and Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
- Department of Hematology, Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Kesheng Dai
- Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, 215006, China
| | - Jianhua Mao
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Sino-French Research Center for Life Sciences and Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
- * E-mail: (JM); (XX)
| | - Xiaodong Xi
- State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Collaborative Innovation Center of Hematology, Sino-French Research Center for Life Sciences and Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
- * E-mail: (JM); (XX)
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20
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Rognoni E, Ruppert R, Fässler R. The kindlin family: functions, signaling properties and implications for human disease. J Cell Sci 2016; 129:17-27. [PMID: 26729028 DOI: 10.1242/jcs.161190] [Citation(s) in RCA: 153] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The kindlin (or fermitin) family of proteins comprises three members (kindlin-1,-2 and -3) of evolutionarily conserved focal adhesion (FA) proteins, whose best-known task is to increase integrin affinity for a ligand (also referred as integrin activation) through binding of β-integrin tails. The consequence of kindlin-mediated integrin activation and integrin-ligand binding is cell adhesion, spreading and migration, assembly of the extracellular matrix (ECM), cell survival, proliferation and differentiation. Another hallmark of kindlins is their involvement in disease. Mutations in the KINDLIN-1 (also known as FERMT1) gene cause Kindler syndrome (KS)--in which mainly skin and intestine are affected, whereas mutations in the KINDLIN-3 (also known as FERMT3) gene cause leukocyte adhesion deficiency type III (LAD III), which is characterized by impaired extravasation of blood effector cells and severe, spontaneous bleedings. Also, aberrant expression of kindlins in various forms of cancer and in tissue fibrosis has been reported. Although the malfunctioning of integrins represent a major cause leading to kindlin-associated diseases, increasing evidence also point to integrin-independent functions of kindlins that play an important role in the pathogenesis of certain disease aspects. Furthermore, isoform-specific kindlin functions have been discovered, explaining, for example, why loss of kindlins differentially affects tissue stem cell homeostasis or tumor development. This Commentary focuses on new and isoform-specific kindlin functions in different tissues and discusses their potential role in disease development and progression.
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Affiliation(s)
- Emanuel Rognoni
- Max Planck Institute of Biochemistry, Martinsried 82152, Germany
| | - Raphael Ruppert
- Max Planck Institute of Biochemistry, Martinsried 82152, Germany
| | - Reinhard Fässler
- Max Planck Institute of Biochemistry, Martinsried 82152, Germany
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21
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Roles of integrin β3 cytoplasmic tail in bidirectional signal transduction in a trans-dominant inhibition model. Front Med 2016; 10:311-9. [DOI: 10.1007/s11684-016-0460-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Accepted: 05/20/2016] [Indexed: 10/21/2022]
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22
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Chatterjee D, Zhiping LL, Tan SM, Bhattacharjya S. Interaction Analyses of the Integrin β2 Cytoplasmic Tail with the F3 FERM Domain of Talin and 14-3-3ζ Reveal a Ternary Complex with Phosphorylated Tail. J Mol Biol 2016; 428:4129-4142. [PMID: 27545410 DOI: 10.1016/j.jmb.2016.08.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 08/11/2016] [Accepted: 08/15/2016] [Indexed: 11/30/2022]
Abstract
Integrins, which are heterodimeric (α and β subunits) signal-transducer proteins, are essential for cell adhesion and migration. β cytosolic tails (β-CTs) of integrins interact with a number of cytosolic proteins including talin, Dok1, and 14-3-3ζ. The formation of multiprotein complexes with β-CTs is involved in the activation and regulation of integrins. The leukocyte-specific β2 integrins are essential for leukocyte trafficking, phagocytosis, antigen presentation, and proliferation. In this study, we examined the binding interactions between integrin β2-CT and T758-phosphorylated β2-CT with positive regulators talin and 14-3-3ζ and negative regulator Dok1. Residues of the F3 domain of talin belonging to the C-terminal helix, β-strand 5, and the adjacent loop were found to be involved in the binding interactions with β2-CT. The binding affinity between talin F3 and β2-CT was reduced when β2 T758 was phosphorylated, but this modification promoted 14-3-3ζ binding. However, we were able to detect stable ternary complex formation of T758-phosphorylated β2-CT, talin F3, and 14-3-3ζ that involved the repositioning of talin F3 on β2-CT. We showed that Dok1 binding to β2-CT was reduced in the presence of 14-3-3ζ and when β2 T758 was phosphorylated. Based on these data, we propose a sequential model of β2 integrin activation involving these molecules. Our study provides for the first time insights toward β2 integrin activation that involves a multiprotein complex.
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Affiliation(s)
- Deepak Chatterjee
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Lewis Lu Zhiping
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Suet-Mien Tan
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore.
| | - Surajit Bhattacharjya
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore.
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23
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Bledzka K, Bialkowska K, Sossey-Alaoui K, Vaynberg J, Pluskota E, Qin J, Plow EF. Kindlin-2 directly binds actin and regulates integrin outside-in signaling. J Cell Biol 2016; 213:97-108. [PMID: 27044892 PMCID: PMC4828686 DOI: 10.1083/jcb.201501006] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Accepted: 02/22/2016] [Indexed: 02/07/2023] Open
Abstract
Bledzka et al. show that kindlin-2 binds actin via its F0 domain, and mutation of this site diminishes cell spreading, revealing a new mechanism by which kindlin-2 regulates cellular responses. Reduced levels of kindlin-2 (K2) in endothelial cells derived from K2+/− mice or C2C12 myoblastoid cells treated with K2 siRNA showed disorganization of their actin cytoskeleton and decreased spreading. These marked changes led us to examine direct binding between K2 and actin. Purified K2 interacts with F-actin in cosedimentation and surface plasmon resonance analyses and induces actin aggregation. We further find that the F0 domain of K2 binds actin. A mutation, LK47/AA, within a predicted actin binding site (ABS) of F0 diminishes its interaction with actin by approximately fivefold. Wild-type K2 and K2 bearing the LK47/AA mutation were equivalent in their ability to coactivate integrin αIIbβ3 in a CHO cell system when coexpressed with talin. However, K2-LK47/AA exhibited a diminished ability to support cell spreading and actin organization compared with wild-type K2. The presence of an ABS in F0 of K2 that influences outside-in signaling across integrins establishes a new foundation for considering how kindlins might regulate cellular responses.
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Affiliation(s)
- Kamila Bledzka
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195
| | - Katarzyna Bialkowska
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195
| | - Khalid Sossey-Alaoui
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195
| | - Julia Vaynberg
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195
| | - Elzbieta Pluskota
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195
| | - Jun Qin
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195
| | - Edward F Plow
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195
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24
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Srinivasan S, Schiemer J, Zhang X, Chishti AH, Le Breton GC. Gα13 Switch Region 2 Binds to the Talin Head Domain and Activates αIIbβ3 Integrin in Human Platelets. J Biol Chem 2015; 290:25129-39. [PMID: 26292217 PMCID: PMC4599016 DOI: 10.1074/jbc.m115.650978] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 08/10/2015] [Indexed: 11/06/2022] Open
Abstract
Even though GPCR signaling in human platelets is directly involved in hemostasis and thrombus formation, the sequence of events by which G protein activation leads to αIIbβ3 integrin activation (inside-out signaling) is not clearly defined. We previously demonstrated that a conformationally sensitive domain of one G protein, i.e. Gα13 switch region 1 (Gα13SR1), can directly participate in the platelet inside-out signaling process. Interestingly however, the dependence on Gα13SR1 signaling was limited to PAR1 receptors, and did not involve signaling through other important platelet GPCRs. Based on the limited scope of this involvement, and the known importance of G13 in hemostasis and thrombosis, the present study examined whether signaling through another switch region of G13, i.e. Gα13 switch region 2 (Gα13SR2) may represent a more global mechanism of platelet activation. Using multiple experimental approaches, our results demonstrate that Gα13SR2 forms a bi-molecular complex with the head domain of talin and thereby promotes β3 integrin activation. Moreover, additional studies provided evidence that Gα13SR2 is not constitutively associated with talin in unactivated platelets, but becomes bound to talin in response to elevated intraplatelet calcium levels. Collectively, these findings provide evidence for a novel paradigm of inside-out signaling in platelets, whereby β3 integrin activation involves the direct binding of the talin head domain to the switch region 2 sequence of the Gα13 subunit.
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Affiliation(s)
- Subhashini Srinivasan
- From the Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612 and
| | - James Schiemer
- Department of Developmental, Molecular, and Chemical Biology, Sackler School of Graduate Biomedical Sciences, Programs in Cellular and Molecular Physiology, Pharmacology, and Microbiology, Tufts University School of Medicine, Boston, Massachusetts 02111
| | - Xiaowei Zhang
- From the Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612 and
| | - Athar H Chishti
- Department of Developmental, Molecular, and Chemical Biology, Sackler School of Graduate Biomedical Sciences, Programs in Cellular and Molecular Physiology, Pharmacology, and Microbiology, Tufts University School of Medicine, Boston, Massachusetts 02111
| | - Guy C Le Breton
- From the Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612 and
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25
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Zhan J, Song J, Wang P, Chi X, Wang Y, Guo Y, Fang W, Zhang H. Kindlin-2 induced by TGF-β signaling promotes pancreatic ductal adenocarcinoma progression through downregulation of transcriptional factor HOXB9. Cancer Lett 2015; 361:75-85. [PMID: 25724625 DOI: 10.1016/j.canlet.2015.02.039] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 01/14/2015] [Accepted: 02/17/2015] [Indexed: 11/17/2022]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is the fourth leading cause of cancer-related deaths with no effective therapeutics. Invasion and metastasis are the major characteristics of PDAC. However, mechanisms underlying PDAC invasion and metastasis are elusive. In this report, we found that Kindlin-2 is a target protein of transforming growth factor β (TGF-β) signaling and is upregulated by TGF-β1 in PDAC cells. TGF-β1-upregulated Kindlin-2 promotes PDAC cell growth, migration and invasion, whereas Kindlin-2 upregulates transforming growth factor receptor I (TβRI), a key component of TGF-β signaling. Thereby Kindlin-2 and TGF-β signaling constitute a positive feedback loop. Mechanistically, Kindlin-2 promotes PDAC progression by downregulation of HOXB9 and E-cadherin. For clinical relevance, enhanced expression of Kindlin-2 predicts a poor overall survival for PDAC patients. Gene expression levels of Kindlin-2, TGF-β, TβRI and HOXB9 are all correlated with the overall survival of PDAC patients in an Oncomine dataset. Taken together, our findings demonstrated that TGF-β1-induced Kindlin-2 expression promotes PDAC progression by downregulation of HOXB9 and E-cadherin.
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Affiliation(s)
- Jun Zhan
- Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education, and State Key Laboratory of Natural and Biomimetic Drugs, Health Science Center, Peking University, Beijing 100191, China; Department of Anatomy, Histology and Embryology, Laboratory of Molecular Cell Biology and Tumor Biology, Beijing 100191, China
| | - Jiagui Song
- Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education, and State Key Laboratory of Natural and Biomimetic Drugs, Health Science Center, Peking University, Beijing 100191, China; Department of Anatomy, Histology and Embryology, Laboratory of Molecular Cell Biology and Tumor Biology, Beijing 100191, China
| | - Peng Wang
- Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education, and State Key Laboratory of Natural and Biomimetic Drugs, Health Science Center, Peking University, Beijing 100191, China; Department of Anatomy, Histology and Embryology, Laboratory of Molecular Cell Biology and Tumor Biology, Beijing 100191, China
| | - Xiaochun Chi
- Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education, and State Key Laboratory of Natural and Biomimetic Drugs, Health Science Center, Peking University, Beijing 100191, China; Department of Anatomy, Histology and Embryology, Laboratory of Molecular Cell Biology and Tumor Biology, Beijing 100191, China
| | - Yunling Wang
- Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education, and State Key Laboratory of Natural and Biomimetic Drugs, Health Science Center, Peking University, Beijing 100191, China; Department of Anatomy, Histology and Embryology, Laboratory of Molecular Cell Biology and Tumor Biology, Beijing 100191, China
| | - Yongqing Guo
- Department of Thoracic Surgery, Sino-Japan Friendship Hospital, Beijing 100123, China
| | - Weigang Fang
- Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education, and State Key Laboratory of Natural and Biomimetic Drugs, Health Science Center, Peking University, Beijing 100191, China; Department of Pathology, Health Science Center, Peking University, Beijing 100191, China.
| | - Hongquan Zhang
- Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education, and State Key Laboratory of Natural and Biomimetic Drugs, Health Science Center, Peking University, Beijing 100191, China; Department of Anatomy, Histology and Embryology, Laboratory of Molecular Cell Biology and Tumor Biology, Beijing 100191, China.
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26
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Simpson MA, Bradley WD, Harburger D, Parsons M, Calderwood DA, Koleske AJ. Direct interactions with the integrin β1 cytoplasmic tail activate the Abl2/Arg kinase. J Biol Chem 2015; 290:8360-72. [PMID: 25694433 DOI: 10.1074/jbc.m115.638874] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Integrins are heterodimeric α/β extracellular matrix adhesion receptors that couple physically to the actin cytoskeleton and regulate kinase signaling pathways to control cytoskeletal remodeling and adhesion complex formation and disassembly. β1 integrins signal through the Abl2/Arg (Abl-related gene) nonreceptor tyrosine kinase to control fibroblast cell motility, neuronal dendrite morphogenesis and stability, and cancer cell invasiveness, but the molecular mechanisms by which integrin β1 activates Arg are unknown. We report here that the Arg kinase domain interacts directly with a lysine-rich membrane-proximal segment in the integrin β1 cytoplasmic tail, that Arg phosphorylates the membrane-proximal Tyr-783 in the β1 tail, and that the Arg Src homology domain then engages this phosphorylated region in the tail. We show that these interactions mediate direct binding between integrin β1 and Arg in vitro and in cells and activate Arg kinase activity. These findings provide a model for understanding how β1-containing integrins interact with and activate Abl family kinases.
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Affiliation(s)
- Mark A Simpson
- From the Departments of Molecular Biophysics and Biochemistry
| | | | | | - Maddy Parsons
- the Randall Division of Cell and Molecular Biophysics, Kings College, London WC2R 2LS, United Kingdom
| | | | - Anthony J Koleske
- From the Departments of Molecular Biophysics and Biochemistry, Neurobiology, Yale University, New Haven, Connecticut 06510 and
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27
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Bialkowska K, Byzova TV, Plow EF. Site-specific phosphorylation of kindlin-3 protein regulates its capacity to control cellular responses mediated by integrin αIIbβ3. J Biol Chem 2015; 290:6226-42. [PMID: 25609252 DOI: 10.1074/jbc.m114.634436] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The contributions of integrins to cellular responses depend upon their activation, which is regulated by binding of proteins to their cytoplasmic tails. Kindlins are integrin cytoplasmic tail binding partners and are essential for optimal integrin activation, and kindlin-3 fulfills this role in hematopoietic cells. Here, we used human platelets and human erythroleukemia (HEL) cells, which express integrin αIIbβ3, to investigate whether phosphorylation of kindlin-3 regulates integrin activation. When HEL cells were stimulated with thrombopoietin or phorbol 12-myristate 13-acetate (PMA), αIIbβ3 became activated as evidenced by binding of an activation-specific monoclonal antibody and soluble fibrinogen, adherence and spreading on fibrinogen, colocalization of β3 integrin and kindlin-3 in focal adhesions, and enhanced β3 integrin-kindlin-3 association in immunoprecipitates. Kindlin-3 knockdown impaired adhesion and spreading on fibrinogen. Stimulation of HEL cells with agonists significantly increased kindlin-3 phosphorylation as detected by mass spectrometric sequencing. Thr(482) or Ser(484) was identified as a phosphorylation site, which resides in a sequence not conserved in kindlin-1 or kindlin-2. These same residues were phosphorylated in kindlin-3 when platelets were stimulated with thrombin. When expressed in HEL cells, T482A/S484A kindlin-3 decreased soluble ligand binding and cell spreading on fibrinogen compared with wild-type kindlin-3. A membrane-permeable peptide containing residues 476-485 of kindlin-3 was introduced into HEL cells and platelets; adhesion and spreading of both cell types were blunted compared with a scrambled control peptide. These data identify a role of kindlin-3 phosphorylation in integrin β3 activation and provide a basis for functional differences between kindlin-3 and the two other kindlin paralogs.
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Affiliation(s)
- Katarzyna Bialkowska
- From the Joseph J. Jacobs Center for Thrombosis and Vascular Biology, Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195
| | - Tatiana V Byzova
- From the Joseph J. Jacobs Center for Thrombosis and Vascular Biology, Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195
| | - Edward F Plow
- From the Joseph J. Jacobs Center for Thrombosis and Vascular Biology, Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195
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28
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Interaction of kindlin-2 with integrin β3 promotes outside-in signaling responses by the αVβ3 vitronectin receptor. Blood 2015; 125:1995-2004. [PMID: 25587038 DOI: 10.1182/blood-2014-09-603035] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The bidirectional signaling and hemostatic functions of platelet αIIbβ3 are regulated by kindlin-3 through interactions with the β3 cytoplasmic tail. Little is known about kindlin regulation of the related "vitronectin receptor," αVβ3. These relationships were investigated in endothelial cells, which express αVβ3 and kindlin-2 endogenously. "β3ΔRGT" knock-in mice lack the 3 C-terminal β3 tail residues, whereas in "β3/β1(EGK)" mice, RGT is replaced by the corresponding residues of β1. The wild-type β3 tail pulled down kindlin-2 and c-Src in vitro, whereas β3ΔRGT bound neither protein and β3/β1(EGK) bound kindlin-2, but not c-Src. β3ΔRGT endothelial cells, but not β3/β1(EGK) endothelial cells, exhibited migration and spreading defects on vitronectin and reduced sprouting in 3-dimensional fibrin. Short hairpin RNA silencing of kindlin-2, but not c-Src, blocked sprouting by β3 wild-type endothelial cells. Moreover, defective sprouting by β3ΔRGT endothelial cells could be rescued by conditional, forced interaction of αVβ3ΔRGT with kindlin-2. Stimulation of β3ΔRGT endothelial cells led to normal extracellular ligand binding to αVβ3, pin-pointing their defect to one of outside-in αVβ3 signaling. β3ΔRGT mice, but not β3/β1(EGK) mice, exhibited defects in both developmental and tumor angiogenesis, responses that require endothelial cell function. Thus, the β3/kindlin-2 interaction promotes outside-in αVβ3 signaling selectively, with biological consequences in vivo.
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29
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Fukuda K, Bledzka K, Yang J, Perera HD, Plow EF, Qin J. Molecular basis of kindlin-2 binding to integrin-linked kinase pseudokinase for regulating cell adhesion. J Biol Chem 2014; 289:28363-75. [PMID: 25160619 DOI: 10.1074/jbc.m114.596692] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Integrin-linked kinase (ILK) is a distinct intracellular adaptor essential for integrin-mediated cell-extracellular matrix adhesion, cell spreading, and migration. Acting as a major docking platform in focal adhesions, ILK engages many proteins to dynamically link integrins with the cytoskeleton, but the underlying mechanism remains elusive. Here, we have characterized the interaction of ILK with kindlin-2, a key regulator for integrin bidirectional signaling. We show that human kindlin-2 binds to human ILK with high affinity. Using systematic mapping approaches, we have identified a major ILK binding site involving a 20-residue fragment (residues 339-358) in kindlin-2. NMR-based analysis reveals a helical conformation of this fragment that utilizes its leucine-rich surface to recognize the ILK pseudokinase domain in a mode that is distinct from another ILK pseudokinase domain binding protein, α-parvin. Structure-based mutational experiments further demonstrate that the kindlin-2 binding to ILK is crucial for the kindlin-2 localization to focal adhesions and cell spreading (integrin outside-in signaling) but dispensable for the kindlin-2-mediated integrin activation (integrin inside-out signaling). These data define a specific mode of the kindlin-2/ILK interaction with mechanistic implications as to how it spatiotemporally mediates integrin signaling and cell adhesion.
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Affiliation(s)
- Koichi Fukuda
- From the Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195
| | - Kamila Bledzka
- From the Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195
| | - Jun Yang
- From the Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195
| | - H Dhanuja Perera
- From the Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195
| | - Edward F Plow
- From the Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195
| | - Jun Qin
- From the Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195
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30
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Zhan J, Yang M, Chi X, Zhang J, Pei X, Ren C, Guo Y, Liu W, Zhang H. Kindlin-2 expression in adult tissues correlates with their embryonic origins. SCIENCE CHINA-LIFE SCIENCES 2014; 57:690-7. [PMID: 24907935 DOI: 10.1007/s11427-014-4676-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 05/06/2014] [Indexed: 11/30/2022]
Abstract
Kindlin-2 functions in the maintenance of homeostasis and in human diseases. This study investigated the interrelationship between Kindlin-2 expression in tissues and the corresponding germ layers from which these tissues originated. Kindlin-2 expression was examined in normal adult human organs and human cancer tissues by immunohistochemical analyses. Analysis of Kindlin-2 mRNA levels in adult human organs in the Oncomine dataset revealed Kindlin-2 is highly expressed in mesoderm-derived organs. However, Kindlin-2 was negative or weakly expressed in endoderm/ectoderm-derived organs. Interestingly, the abnormal expression of Kindlin-2 was observed in a variety of human cancers. In agreement with its expression profile in humans, Kindlin-2 was also highly expressed in mesoderm-derived organs in mouse embryos with the exception of strong Kindlin-2 expression in ectoderm-derived spinal cord and ganglia, tissues that are highly mobile during embryonic development. Importantly, we demonstrated the expression level of Kindlin-2 in adult organs correlated with their embryonic dermal origins and deregulation of Kindlin-2 in tissues is associated with tumor progression. This finding will help us understand the dual role of Kindlin-2 in the regulation of tumor progression and embryonic development.
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Affiliation(s)
- Jun Zhan
- Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education, Peking University Health Science Center, Beijing, 100191, China
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31
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Fitzpatrick P, Shattil SJ, Ablooglu AJ. C-terminal COOH of integrin β1 is necessary for β1 association with the kindlin-2 adapter protein. J Biol Chem 2014; 289:11183-11193. [PMID: 24599960 DOI: 10.1074/jbc.m113.535369] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Protein-protein interactions are driving forces in cellular processes. As a prime example, transmembrane integrins link extracellular matrix and intracellular proteins, resulting in bidirectional signaling that regulates cell migration, proliferation, differentiation, and survival. Here we provide the first evidence that interaction between the integrin β1 cytoplasmic tail and kindlin-2, a member of a family of adapters implicated in human disease pathogenesis, is mainly governed by the β1 C-terminal carboxylate moiety and is required for laterality organ development in zebrafish. Affinity measurements indicate that this unusual protein-protein interaction mode is coordinated by a putative carboxylate-binding motif in the kindlin-2 FERM subdomain F3. Contrary to the C terminus of proteins that engage PDZ domains, the C-terminal three residues of β1, per se, do not contribute to kindlin-2 binding or to laterality organ development. Thus, by employing zebrafish as an in situ physiological tool to correlate protein structure and function, we have discovered an unexpected association chemistry between an integrin and a key adapter involved in integrin signaling.
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Affiliation(s)
- Paul Fitzpatrick
- Department of Medicine, University of California San Diego, La Jolla, California 92093-0726
| | - Sanford J Shattil
- Department of Medicine, University of California San Diego, La Jolla, California 92093-0726
| | - Ararat J Ablooglu
- Department of Medicine, University of California San Diego, La Jolla, California 92093-0726.
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32
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Calderwood DA, Campbell ID, Critchley DR. Talins and kindlins: partners in integrin-mediated adhesion. Nat Rev Mol Cell Biol 2013; 14:503-17. [PMID: 23860236 DOI: 10.1038/nrm3624] [Citation(s) in RCA: 414] [Impact Index Per Article: 37.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Integrin receptors provide a dynamic, tightly-regulated link between the extracellular matrix (or cellular counter-receptors) and intracellular cytoskeletal and signalling networks, enabling cells to sense and respond to their chemical and physical environment. Talins and kindlins, two families of FERM-domain proteins, bind the cytoplasmic tail of integrins, recruit cytoskeletal and signalling proteins involved in mechanotransduction and synergize to activate integrin binding to extracellular ligands. New data reveal the domain structure of full-length talin, provide insights into talin-mediated integrin activation and show that RIAM recruits talin to the plasma membrane, whereas vinculin stabilizes talin in cell-matrix junctions. How kindlins act is less well-defined, but disease-causing mutations show that kindlins are also essential for integrin activation, adhesion, cell spreading and signalling.
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Affiliation(s)
- David A Calderwood
- Departments of Pharmacology and of Cell Biology, Yale University School of Medicine, New Haven, Connecticut 06520, USA. david.calderwood@ yale.edu
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Bouvard D, Pouwels J, De Franceschi N, Ivaska J. Integrin inactivators: balancing cellular functions in vitro and in vivo. Nat Rev Mol Cell Biol 2013; 14:430-42. [DOI: 10.1038/nrm3599] [Citation(s) in RCA: 173] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Xu Z, Gao J, Hong J, Ma YQ. Integrity of kindlin-2 FERM subdomains is required for supporting integrin activation. Biochem Biophys Res Commun 2013; 434:382-7. [PMID: 23578664 DOI: 10.1016/j.bbrc.2013.03.086] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Accepted: 03/31/2013] [Indexed: 11/19/2022]
Abstract
Kindlin family members are essential for supporting integrin activation by functionally cooperating with the talin head domain. Both the talin head and kindlin are FERM domain-containing proteins that can simultaneously interact with the integrin β cytoplasmic tails. While the talin head is well studied, the molecular basis of kindlin's interaction with integrin during integrin activation is still poorly understood. Here we defined the subdomain boundaries in kindlin-2 and evaluated their contribution to integrin activation and recognition. We found that each subdomain in kindlin-2 was required for co-activating the integrin αIIbβ3 together with the talin head (inside-out signaling) and for enhancing integrin αIIbβ3-mediated cell spreading (outside-in signaling). To evaluate the involvement of the kindlin-2 subdomains in integrin interaction, we developed a FACS-based binding assay and found that an intact FERM domain in kindlin-2 was required for the interaction. Taking all together, these findings suggest that the integrity of kindlin-2 subdomains is a prerequisite for supporting integrin recognition and for subsequent integrin activation.
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Affiliation(s)
- Zhen Xu
- Blood Research Institute, Blood Center of Wisconsin, Milwaukee, WI 53226, USA
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Yates LA, Füzéry AK, Bonet R, Campbell ID, Gilbert RJC. Biophysical analysis of Kindlin-3 reveals an elongated conformation and maps integrin binding to the membrane-distal β-subunit NPXY motif. J Biol Chem 2012; 287:37715-31. [PMID: 22989875 PMCID: PMC3488048 DOI: 10.1074/jbc.m112.415208] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 09/17/2012] [Indexed: 11/24/2022] Open
Abstract
Kindlin-3, a 75-kDa protein, has been shown to be critical for hemostasis, immunity, and bone metabolism via its role in integrin activation. The Kindlin family is hallmarked by a FERM domain comprised of F1, F2, and F3 subdomains together with an N-terminal F0 domain and a pleckstrin homology domain inserted in the F2 domain. Recombinant Kindlin-3 was cloned, expressed, and purified, and its domain organization was studied by x-ray scattering and other techniques to reveal an extended conformation. This unusual elongated structure is similar to that found in the paralogue Talin head domain. Analytical ultracentrifugation experiments indicated that Kindlin-3 forms a ternary complex with the Talin and β-integrin cytoplasmic tails. NMR showed that Kindlin-3 specifically recognizes the membrane-distal tail NPXY motif in both the β(1A) and β(1D) isoforms, although the interaction is stronger with β(1A). An upstream Ser/Thr cluster in the tails also plays a critical role. Overall these data support current biological, clinical, and mutational data on Kindlin-3/β-tail binding and provide novel insights into the overall conformation and interactions of Kindlin-3.
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Affiliation(s)
- Luke A. Yates
- From the Division of Structural Biology, Wellcome Trust Centre for Human Genetics, Roosevelt Drive, University of Oxford, Oxford OX3 7BN, United Kingdom and
| | - Anna K. Füzéry
- the Department of Biochemistry, South Parks Road, University of Oxford, Oxford OX1 3QU, United Kingdom
| | - Roman Bonet
- the Department of Biochemistry, South Parks Road, University of Oxford, Oxford OX1 3QU, United Kingdom
| | - Iain D. Campbell
- the Department of Biochemistry, South Parks Road, University of Oxford, Oxford OX1 3QU, United Kingdom
| | - Robert J. C. Gilbert
- From the Division of Structural Biology, Wellcome Trust Centre for Human Genetics, Roosevelt Drive, University of Oxford, Oxford OX3 7BN, United Kingdom and
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Tian W, Qu L, Meng L, Liu C, Wu J, Shou C. Phosphatase of regenerating liver-3 directly interacts with integrin β1 and regulates its phosphorylation at tyrosine 783. BMC BIOCHEMISTRY 2012; 13:22. [PMID: 23092334 PMCID: PMC3558359 DOI: 10.1186/1471-2091-13-22] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Accepted: 09/26/2012] [Indexed: 12/31/2022]
Abstract
Background Phosphatase of regenerating liver-3 (PRL-3 or PTP4A3) has been implicated in controlling cancer cell proliferation, motility, metastasis, and angiogenesis. Deregulated expression of PRL-3 is highly correlated with cancer progression and predicts poor survival. Although PRL-3 was categorized as a tyrosine phosphatase, its cellular substrates remain largely unknown. Results We demonstrated that PRL-3 interacts with integrin β1 in cancer cells. Recombinant PRL-3 associates with the intracellular domain of integrin β1 in vitro. Silencing of integrin α1 enhances PRL-3-integrin β1 interaction. Furthermore, PRL-3 diminishes tyrosine phosphorylation of integrin β1 in vitro and in vivo. With site-specific anti-phosphotyrosine antibodies against residues in the intracellular domain of integrin β1, tyrosine-783, but not tyrosine-795, is shown to be dephosphorylated by PRL-3 in a catalytic activity-dependant manner. Phosphorylation of Y783 is potentiated by ablation of PRL-3 or by treatment with a chemical inhibitor of PRL-3. Conversely, depletion of integrin α1 decreases the phosphorylation of this site. Conclusions Our results revealed a direct interaction between PRL-3 and integrin β1 and characterized Y783 of integrin β1 as a bona fide substrate of PRL-3, which is negatively regulated by integrin α1.
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Affiliation(s)
- Wei Tian
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Biochemistry and Molecular Biology, Peking University Cancer Hospital & Institute, Beijing, China
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Assembly and disassembly of cell matrix adhesions. Curr Opin Cell Biol 2012; 24:569-81. [DOI: 10.1016/j.ceb.2012.06.010] [Citation(s) in RCA: 160] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Revised: 06/12/2012] [Accepted: 06/28/2012] [Indexed: 11/22/2022]
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Abstract
PURPOSE OF REVIEW In the current review, we summarize recent progress on vasculature-specific function and regulation of integrins and integrin-associated proteins, including advances in our understanding of inside-out integrin activation. The studies on regulation of integrin activation received new impulse in 2009 with the identification of kindlin protein family members as crucial mediators of integrin inside-out signaling. In the current review, we outline the recent findings on the role of kindlins in the vascular system, as well as new studies that have begun shaping the mechanistic model of kindlins' function. RECENT FINDINGS Several tissue-specific knockout models for integrins and genes associated with the integrin functions have been recently presented, including smooth muscle-specific integrin-linked kinase and endothelial-specific focal adhesion kinase and talin-1 ablation. In the heterozygous animal knockout model, kindlin-2 has been demonstrated as a crucial modulator of angiogenesis and vascular permeability. As a number of articles have advanced our understanding of kindlin function, they are reviewed and discussed in further detail. New findings include an additional lipid-binding site within the kindlin molecule and preferential binding of the nonphosphorylated form of β-integrins. SUMMARY The role of integrins in angiogenesis has been demonstrated to include, in addition to cell adhesion and mechanotransduction, specific signaling functions. The importance of integrin inside-out pathway in vascular physiology has been unequivocally proven, and endothelial permeability is directly regulated by this process. Inhibition of kindlin-dependent steps in the inside-out pathway as an approach to block platelet aggregation should be paralog-specific, as it may have adverse effects on vascular permeability.
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Bledzka K, Liu J, Xu Z, Perera HD, Yadav SP, Bialkowska K, Qin J, Ma YQ, Plow EF. Spatial coordination of kindlin-2 with talin head domain in interaction with integrin β cytoplasmic tails. J Biol Chem 2012; 287:24585-94. [PMID: 22648415 PMCID: PMC3397883 DOI: 10.1074/jbc.m111.336743] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Revised: 05/29/2012] [Indexed: 12/20/2022] Open
Abstract
Both talin head domain and kindlin-2 interact with integrin β cytoplasmic tails, and they function in concert to induce integrin activation. Binding of talin head domain to β cytoplasmic tails has been characterized extensively, but information on the interaction of kindin-2 with this integrin segment is limited. In this study, we systematically examine the interactions of kindlin-2 with integrin β tails. Kindlin-2 interacted well with β(1) and β(3) tails but poorly with the β(2) cytoplasmic tail. This binding selectivity was determined by the non-conserved residues, primarily the three amino acids at the extreme C terminus of the β(3) tail, and the sequence in β(2) was non-permissive. The region at the C termini of integrin β(1) and β(3) tails recognized by kindlin-2 was a binding core of 12 amino acids. Kindlin-2 and talin head do not interact with one another but can bind simultaneously to the integrin β(3) tail without enhancing or inhibiting the interaction of the other binding partner. Kindlin-2 itself failed to directly unclasp integrin α/β tail complex, indicating that kindlin-2 must cooperate with talin to support the integrin activation mechanism.
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Affiliation(s)
- Kamila Bledzka
- From the Department of Molecular Cardiology, Joseph J. Jacobs Center for Thrombosis and Vascular Biology/NB-50 and
| | - Jianmin Liu
- From the Department of Molecular Cardiology, Joseph J. Jacobs Center for Thrombosis and Vascular Biology/NB-50 and
| | - Zhen Xu
- Blood Research Institute, Blood Center of Wisconsin, Milwaukee, Wisconsin 53226
| | - H. Dhanuja Perera
- From the Department of Molecular Cardiology, Joseph J. Jacobs Center for Thrombosis and Vascular Biology/NB-50 and
| | - Satya P. Yadav
- Research Core Services, Department of Molecular Biotechnology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195 and
| | - Katarzyna Bialkowska
- From the Department of Molecular Cardiology, Joseph J. Jacobs Center for Thrombosis and Vascular Biology/NB-50 and
| | - Jun Qin
- From the Department of Molecular Cardiology, Joseph J. Jacobs Center for Thrombosis and Vascular Biology/NB-50 and
| | - Yan-Qing Ma
- Blood Research Institute, Blood Center of Wisconsin, Milwaukee, Wisconsin 53226
| | - Edward F. Plow
- From the Department of Molecular Cardiology, Joseph J. Jacobs Center for Thrombosis and Vascular Biology/NB-50 and
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Kahner BN, Kato H, Banno A, Ginsberg MH, Shattil SJ, Ye F. Kindlins, integrin activation and the regulation of talin recruitment to αIIbβ3. PLoS One 2012; 7:e34056. [PMID: 22457811 PMCID: PMC3311585 DOI: 10.1371/journal.pone.0034056] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Accepted: 02/21/2012] [Indexed: 11/18/2022] Open
Abstract
Talins and kindlins bind to the integrin β3 cytoplasmic tail and both are required for effective activation of integrin αIIbβ3 and resulting high-affinity ligand binding in platelets. However, binding of the talin head domain alone to β3 is sufficient to activate purified integrin αIIbβ3 in vitro. Since talin is localized to the cytoplasm of unstimulated platelets, its re-localization to the plasma membrane and to the integrin is required for activation. Here we explored the mechanism whereby kindlins function as integrin co-activators. To test whether kindlins regulate talin recruitment to plasma membranes and to αIIbβ3, full-length talin and kindlin recruitment to β3 was studied using a reconstructed CHO cell model system that recapitulates agonist-induced αIIbβ3 activation. Over-expression of kindlin-2, the endogenous kindlin isoform in CHO cells, promoted PAR1-mediated and talin-dependent ligand binding. In contrast, shRNA knockdown of kindlin-2 inhibited ligand binding. However, depletion of kindlin-2 by shRNA did not affect talin recruitment to the plasma membrane, as assessed by sub-cellular fractionation, and neither over-expression of kindlins nor depletion of kindlin-2 affected talin interaction with αIIbβ3 in living cells, as monitored by bimolecular fluorescence complementation. Furthermore, talin failed to promote kindlin-2 association with αIIbβ3 in CHO cells. In addition, purified talin and kindlin-3, the kindlin isoform expressed in platelets, failed to promote each other's binding to the β3 cytoplasmic tail in vitro. Thus, kindlins do not promote initial talin recruitment to αIIbβ3, suggesting that they co-activate integrin through a mechanism independent of recruitment.
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Affiliation(s)
- Bryan N Kahner
- Department of Medicine, University of California San Diego, La Jolla, California, United States of America
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Grigoryan G, Moore DT, DeGrado WF. Transmembrane communication: general principles and lessons from the structure and function of the M2 proton channel, K⁺ channels, and integrin receptors. Annu Rev Biochem 2011; 80:211-37. [PMID: 21548783 DOI: 10.1146/annurev-biochem-091008-152423] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Signal transduction across biological membranes is central to life. This process generally happens through communication between different domains and hierarchical coupling of information. Here, we review structural and thermodynamic principles behind transmembrane (TM) signal transduction and discuss common themes. Communication between signaling domains can be understood in terms of thermodynamic and kinetic principles, and complex signaling patterns can arise from simple wiring of thermodynamically coupled domains. We relate this to functions of several signal transduction systems: the M2 proton channel from influenza A virus, potassium channels, integrin receptors, and bacterial kinases. We also discuss key features in the structural rearrangements responsible for signal transduction in these systems.
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Affiliation(s)
- Gevorg Grigoryan
- Department of Biochemistry and Biophysics, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
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Abstract
Integrins are integral membrane proteins that mediate cell-matrix and cell-cell adhesion. They are important for vascular development and hematopoiesis, immune and inflammatory responses, and hemostasis. Integrins are also signaling receptors that can transmit information bidirectionally across plasma membranes. Research in the past 2 decades has made progress in unraveling the mechanisms of integrin signaling and brings the field to the moment of attempting synthetic reconstruction of the signaling pathways in vitro. Reconstruction of biologic processes provides stringent tests of our understanding of the process, as evidenced by studies of other biologic machines, such as ATP synthase, lactose permease, and G-protein-coupled receptors. Here, we review recent progress in reconstructing integrin signaling and the insights that we have gained through these experiments.
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Beta1 integrin cytoplasmic tyrosines promote skin tumorigenesis independent of their phosphorylation. Proc Natl Acad Sci U S A 2011; 108:15213-8. [PMID: 21876123 DOI: 10.1073/pnas.1105689108] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
β1 integrin tyrosine phosphorylation by oncogenic kinases, such as Src, has been predicted to induce tumorigenesis by disrupting adhesion and modifying integrin signaling. We directly tested this hypothesis by subjecting mice with "nonphosphorylatable" tyrosine-to-phenylalanine substitutions in the conserved β1 cytoplasmic tail NPxY motifs to a model of cutaneous carcinogenesis in the presence or absence of elevated Src activity. We found that hydrophobic phenylalanine substitutions of both tyrosines diminished the binding of tail-interacting proteins, including talins and kindlins, resulting in reduced β1-mediated adhesion, focal adhesion kinase (FAK) signaling, and epidermal progenitor cell-derived skin tumors. However, increased Src activity drove tumor formation independent of the phenylalanine substitutions by enhancing FAK activity, which in turn maintained the epidermal progenitor state and blocked keratinocyte differentiation. We conclude that a Src/FAK signaling unit inhibits differentiation to promote tumorigenesis downstream of β1 integrin and independent of β1 integrin tyrosine phosphorylation.
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Holmes RS, Rout UK. Comparative studies of vertebrate Beta integrin genes and proteins: ancient genes in vertebrate evolution. Biomolecules 2011; 1:3-31. [PMID: 24970121 PMCID: PMC4030831 DOI: 10.3390/biom1010003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Revised: 08/14/2011] [Accepted: 08/15/2011] [Indexed: 12/31/2022] Open
Abstract
Intregins are heterodimeric α- and β-subunit containing membrane receptor proteins which serve various cell adhesion roles in tissue repair, hemostasis, immune response, embryogenesis and metastasis. At least 18 α- (ITA or ITGA) and 8 β-integrin subunits (ITB or ITGB) are encoded on mammalian genomes. Comparative ITB amino acid sequences and protein structures and ITB gene locations were examined using data from several vertebrate genome projects. Vertebrate ITB genes usually contained 13-16 coding exons and encoded protein subunits with ~800 amino acids, whereas vertebrate ITB4 genes contained 36-39 coding exons and encoded larger proteins with ~1800 amino acids. The ITB sequences exhibited several conserved domains including signal peptide, extracellular β-integrin, β-tail domain and integrin β-cytoplasmic domains. Sequence alignments of the integrin β-cytoplasmic domains revealed highly conserved regions possibly for performing essential functions and its maintenance during vertebrate evolution. With the exception of the human ITB8 sequence, the other ITB sequences shared a predicted 19 residue α-helix for this region. Potential sites for regulating human ITB gene expression were identified which included CpG islands, transcription factor binding sites and microRNA binding sites within the 3'-UTR of human ITB genes. Phylogenetic analyses examined the relationships of vertebrate beta-integrin genes which were consistent with four major groups: 1: ITB1, ITB2, ITB7; 2: ITB3, ITB5, ITB6; 3: ITB4; and 4: ITB8 and a common evolutionary origin from an ancestral gene, prior to the appearance of fish during vertebrate evolution. The phylogenetic analyses revealed that ITB4 is the most likely primordial form of the vertebrate β integrin subunit encoding genes, that is the only β subunit expressed as a constituent of the sole integrin receptor 'α6β4' in the hemidesmosomes of unicellular organisms.
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Affiliation(s)
- Roger S Holmes
- School of Biomolecular and Physical Sciences, Griffith University, Nathan, 4111QLD, Australia.
| | - Ujjwal K Rout
- Department of Surgery, University of Mississippi Medical Center, Jackson, MS 38677, USA.
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Abstract
Platelets are a remarkable mammalian adaptation that are required for human survival by virtue of their ability to prevent and arrest bleeding. Ironically, however, in the past century, the platelets' hemostatic activity became maladaptive for the increasingly large percentage of individuals who develop age-dependent progressive atherosclerosis. As a result, platelets also make a major contribution to ischemic thrombotic vascular disease, the leading cause of death worldwide. In this brief review, I provide historical descriptions of a highly selected group of topics to provide a framework for understanding our current knowledge and the trends that are likely to continue into the future of platelet research. For convenience, I separate the eras of platelet research into the "Descriptive Period" extending from ~1880-1960 and the "Mechanistic Period" encompassing the past ~50 years since 1960. We currently are reaching yet another inflection point, as there is a major shift from a focus on traditional biochemistry and cell and molecular biology to an era of single molecule biophysics, single cell biology, single cell molecular biology, structural biology, computational simulations, and the high-throughput, data-dense techniques collectively named with the "omics postfix". Given the progress made in understanding, diagnosing, and treating many rare and common platelet disorders during the past 50 years, I think it appropriate to consider it a Golden Age of Platelet Research and to recognize all of the investigators who have made important contributions to this remarkable achievement..
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Affiliation(s)
- Barry S. Coller
- Laboratory of Blood and Vascular Biology, Rockefeller University, 1230 York Avenue, New York, NY 10065, Tel: 212-327-7490, Fax: 212-327-7493
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Anthis NJ, Campbell ID. The tail of integrin activation. Trends Biochem Sci 2011; 36:191-8. [PMID: 21216149 DOI: 10.1016/j.tibs.2010.11.002] [Citation(s) in RCA: 132] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Revised: 11/29/2010] [Accepted: 11/30/2010] [Indexed: 12/13/2022]
Abstract
Integrins are essential adhesion receptors found on the surfaces of all metazoan cells. As regulators of cell migration and extracellular matrix assembly, these membrane-spanning heterodimers are critical for embryonic development, tissue repair and immune responses. Signals transmitted by integrins from outside to inside the cell promote cell survival and proliferation, but integrin affinity for extracellular ligands can also be controlled by intracellular cues. This bidirectional signaling is mediated by the short cytoplasmic tails of the two integrin subunits. Recent structural and functional studies of various integrin fragments and complexes between the cytoplasmic tails and intracellular proteins, such as talin, have provided new insight into the signaling processes centered around the tails, particularly inside-out integrin activation.
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Affiliation(s)
- Nicholas J Anthis
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0520, USA
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