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Huo T, Wu H, Moussa Z, Sen M, Dalton V, Wang Z. Full-length αIIbβ3 cryo-EM structure reveals intact integrin initiate-activation intrinsic architecture. Structure 2024; 32:899-906.e3. [PMID: 38579706 PMCID: PMC11246237 DOI: 10.1016/j.str.2024.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 12/06/2023] [Accepted: 03/11/2024] [Indexed: 04/07/2024]
Abstract
Integrin αIIbβ3 is the key receptor regulating platelet retraction and accumulation and a proven drug-target for antithrombotic therapies. Here we resolve the cryo-EM structures of the full-length αIIbβ3, which covers three distinct states along the activation pathway. Firstly, we obtain the αIIbβ3 structure at 3 Å resolution in the inactive state, revealing the overall topology of the heterodimer with the transmembrane (TM) helices and the ligand-binding domain tucked in a specific angle proximity to the TM region. After the addition of a Mn2+ agonist, we resolve two coexisting structures representing two new states between inactive and active state. Our structures show conformational changes of the αIIbβ3 activating trajectory and a unique twisting of the integrin legs, which is required for platelets accumulation. Our structure provides direct structural evidence for how the lower legs are involved in full-length integrin activation mechanisms and offers a new strategy to target the αIIbβ3 lower leg.
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Affiliation(s)
- Tong Huo
- Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Hongjiang Wu
- Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Graduate School of Baylor College of Medicine, Baylor College of Medicine, Houston, TX 77030, USA
| | - Zeinab Moussa
- Department of Biology and Biochemistry, University of Houston, Houston, TX 77204, USA
| | - Mehmet Sen
- Department of Biology and Biochemistry, University of Houston, Houston, TX 77204, USA
| | - Valerie Dalton
- Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Zhao Wang
- Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Cryo-EM/ET CPRIT Core, Baylor College of Medicine, Houston, TX 77030, USA; Dan L Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA; Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA.
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2
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Litschel T, Kelley CF, Cheng X, Babl L, Mizuno N, Case LB, Schwille P. Membrane-induced 2D phase separation of the focal adhesion protein talin. Nat Commun 2024; 15:4986. [PMID: 38862544 PMCID: PMC11166923 DOI: 10.1038/s41467-024-49222-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 05/22/2024] [Indexed: 06/13/2024] Open
Abstract
Focal adhesions form liquid-like assemblies around activated integrin receptors at the plasma membrane. How they achieve their flexible properties is not well understood. Here, we use recombinant focal adhesion proteins to reconstitute the core structural machinery in vitro. We observe liquid-liquid phase separation of the core focal adhesion proteins talin and vinculin for a spectrum of conditions and interaction partners. Intriguingly, we show that binding to PI(4,5)P2-containing membranes triggers phase separation of these proteins on the membrane surface, which in turn induces the enrichment of integrin in the clusters. We suggest a mechanism by which 2-dimensional biomolecular condensates assemble on membranes from soluble proteins in the cytoplasm: lipid-binding triggers protein activation and thus, liquid-liquid phase separation of these membrane-bound proteins. This could explain how early focal adhesions maintain a structured and force-resistant organization into the cytoplasm, while still being highly dynamic and able to quickly assemble and disassemble.
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Affiliation(s)
- Thomas Litschel
- Department of Cellular and Molecular Biophysics, Max Planck Institute of Biochemistry, Martinsried, Germany.
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA.
| | - Charlotte F Kelley
- Department of Cellular and Molecular Biophysics, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Xiaohang Cheng
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Leon Babl
- Department of Cellular and Molecular Biophysics, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Naoko Mizuno
- Department of Structural Cell Biology, Max Planck Institute of Biochemistry, Martinsried, Germany
- Laboratory of Structural Cell Biology, National Institutes of Health, Bethesda, MD, USA
| | - Lindsay B Case
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Petra Schwille
- Department of Cellular and Molecular Biophysics, Max Planck Institute of Biochemistry, Martinsried, Germany.
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3
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Lee J, Lee M, Kim J, Cho EG, Kim C. Producing highly effective extracellular vesicles using IBAR and talin F3 domain fusion. Anim Cells Syst (Seoul) 2024; 28:283-293. [PMID: 38770055 PMCID: PMC11104707 DOI: 10.1080/19768354.2024.2353159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Accepted: 04/30/2024] [Indexed: 05/22/2024] Open
Abstract
Extracellular vesicles (EVs), transporting diverse cellular components, play a crucial role in intercellular communication in numerous physiological and pathological processes. EVs have also been recognized as a drug delivery platform for therapeutic purposes and cell-free regenerative medicine. While various approaches have focused on increasing EV production for efficient use therapeutic use of EVs, enhancing the quality of EVs, such as ensuring efficient uptake by their target cells, has not been widely explored. In this study, we linked a negative membrane curvature-forming inverse BAR (IBAR) domain with an integrin β tail-binding talin F3 domain to create the IBAR-F3 fusion protein. We observed that IBAR-F3 can trigger filopodia-like membrane protrusions and attract integrins to those protrusion-rich regions, when expressed in Chinese hamster ovary cells expressing integrin αIIbβ3. Surprisingly, the expression of IBAR-F3 also induced a robust production of EVs, which were then efficiently taken up by nearby cells in an integrin-dependent manner. Moreover, IBAR triggered integrin activation, presumably by inducing negative membrane curvature that likely disrupts the interaction between the integrin α and β transmembrane domain. Therefore, we suggest that IBAR-F3 should be utilized to promote both EV production and efficient uptake mediated by integrins. Furthermore, the negative curvature-inducing integrin activation suggests that integrins on EVs can be activated by the nanoscale change in the curvature of the EV without the need for conventional machinery to activate integrin inside the EVs.
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Affiliation(s)
- Joonha Lee
- Department of Life Sciences, Korea University, Seoul, Republic of Korea
| | - MinHyeong Lee
- Department of Life Sciences, Korea University, Seoul, Republic of Korea
| | - Jiyoon Kim
- Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Eun-Gyung Cho
- Consumer Health 2 Center, CHA Advanced Research Institute, Bundang CHA Medical Center, Seongnam, Republic of Korea
| | - Chungho Kim
- Department of Life Sciences, Korea University, Seoul, Republic of Korea
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4
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Mandal K, Wicaksono G, Yu C, Adams JJ, Hoopmann MR, Temple WC, Izgutdina A, Escobar BP, Gorelik M, Ihling CH, Nix MA, Naik A, Xie WH, Hübner J, Rollins LA, Reid SM, Ramos E, Kasap C, Steri V, Serrano JAC, Salangsang F, Phojanakong P, McMillan M, Gavallos V, Leavitt AD, Logan AC, Rooney CM, Eyquem J, Sinz A, Huang BJ, Stieglitz E, Smith CC, Moritz RL, Sidhu SS, Huang L, Wiita AP. Structural surfaceomics reveals an AML-specific conformation of integrin β 2 as a CAR T cellular therapy target. NATURE CANCER 2023; 4:1592-1609. [PMID: 37904046 PMCID: PMC10663162 DOI: 10.1038/s43018-023-00652-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 09/12/2023] [Indexed: 11/01/2023]
Abstract
Safely expanding indications for cellular therapies has been challenging given a lack of highly cancer-specific surface markers. Here we explore the hypothesis that tumor cells express cancer-specific surface protein conformations that are invisible to standard target discovery pipelines evaluating gene or protein expression, and these conformations can be identified and immunotherapeutically targeted. We term this strategy integrating cross-linking mass spectrometry with glycoprotein surface capture 'structural surfaceomics'. As a proof of principle, we apply this technology to acute myeloid leukemia (AML), a hematologic malignancy with dismal outcomes and no known optimal immunotherapy target. We identify the activated conformation of integrin β2 as a structurally defined, widely expressed AML-specific target. We develop and characterize recombinant antibodies to this protein conformation and show that chimeric antigen receptor T cells eliminate AML cells and patient-derived xenografts without notable toxicity toward normal hematopoietic cells. Our findings validate an AML conformation-specific target antigen and demonstrate a tool kit for applying these strategies more broadly.
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Affiliation(s)
- Kamal Mandal
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Gianina Wicaksono
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Clinton Yu
- Department of Physiology and Biophysics, University of California Irvine, Irvine, CA, USA
| | - Jarrett J Adams
- The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada
- School of Pharmacy, University of Waterloo, Kitchener, Ontario, Canada
| | | | - William C Temple
- Department of Pediatrics, Division of Hematology/Oncology, University of California San Francisco, San Francisco, CA, USA
- Department of Pediatrics, Division of Allergy, Immunology, and Bone Marrow Transplantation, University of California San Francisco, San Francisco, CA, USA
| | - Adila Izgutdina
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Bonell Patiño Escobar
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Maryna Gorelik
- The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada
| | - Christian H Ihling
- Department of Pharmaceutical Chemistry and Bioanalytics, Institute of Pharmacy, Martin-Luther University Halle-Wittenberg, Halle, Germany
| | - Matthew A Nix
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Akul Naik
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA
| | - William H Xie
- UCSF/Gladstone Institute for Genomic Immunology, San Francisco, CA, USA
| | - Juwita Hübner
- Department of Pediatrics, Division of Hematology/Oncology, University of California San Francisco, San Francisco, CA, USA
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - Lisa A Rollins
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital-Texas Children's Hospital, Houston, TX, USA
| | - Sandy M Reid
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital-Texas Children's Hospital, Houston, TX, USA
| | - Emilio Ramos
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Corynn Kasap
- Department of Medicine, Division of Hematology/Oncology, University of California San Francisco, San Francisco, CA, USA
| | - Veronica Steri
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - Juan Antonio Camara Serrano
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - Fernando Salangsang
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - Paul Phojanakong
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - Melanie McMillan
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Victor Gavallos
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Andrew D Leavitt
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Aaron C Logan
- Department of Medicine, Division of Hematology/Oncology, University of California San Francisco, San Francisco, CA, USA
| | - Cliona M Rooney
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital-Texas Children's Hospital, Houston, TX, USA
| | - Justin Eyquem
- UCSF/Gladstone Institute for Genomic Immunology, San Francisco, CA, USA
- Department of Medicine, Division of Hematology/Oncology, University of California San Francisco, San Francisco, CA, USA
| | - Andrea Sinz
- Department of Pharmaceutical Chemistry and Bioanalytics, Institute of Pharmacy, Martin-Luther University Halle-Wittenberg, Halle, Germany
| | - Benjamin J Huang
- Department of Pediatrics, Division of Hematology/Oncology, University of California San Francisco, San Francisco, CA, USA
| | - Elliot Stieglitz
- Department of Pediatrics, Division of Hematology/Oncology, University of California San Francisco, San Francisco, CA, USA
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - Catherine C Smith
- Department of Medicine, Division of Hematology/Oncology, University of California San Francisco, San Francisco, CA, USA
| | | | - Sachdev S Sidhu
- The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada
- School of Pharmacy, University of Waterloo, Kitchener, Ontario, Canada
| | - Lan Huang
- Department of Physiology and Biophysics, University of California Irvine, Irvine, CA, USA
| | - Arun P Wiita
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA.
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA.
- Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, San Francisco, CA, USA.
- Chan Zuckerberg Biohub San Francisco, San Francisco, CA, USA.
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5
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Schönichen C, Montague SJ, Brouns SL, Burston JJ, Cosemans JM, Jurk K, Kehrel BE, Koenen RR, Ní Áinle F, O’Donnell VB, Soehnlein O, Watson SP, Kuijpers MJ, Heemskerk JW, Nagy M. Antagonistic Roles of Human Platelet Integrin αIIbβ3 and Chemokines in Regulating Neutrophil Activation and Fate on Arterial Thrombi Under Flow. Arterioscler Thromb Vasc Biol 2023; 43:1700-1712. [PMID: 37409530 PMCID: PMC10443630 DOI: 10.1161/atvbaha.122.318767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 06/14/2023] [Indexed: 07/07/2023]
Abstract
BACKGROUND Platelets and neutrophils are the first blood cells accumulating at sites of arterial thrombus formation, and both cell types contribute to the pathology of thrombotic events. We aimed to identify key interaction mechanisms between these cells using microfluidic approaches. METHODS Whole-blood perfusion was performed over a collagen surface at arterial shear rate. Platelet and leukocyte (in majority neutrophil) activation were microscopically visualized using fluorescent markers. The contributions of platelet-adhesive receptors (integrin, P-selectin, CD40L) and chemokines were studied by using inhibitors or antibodies and using blood from patients with GT (Glanzmann thrombasthenia) lacking platelet-expressed αIIbβ3. RESULTS We observed (1) an unknown role of activated platelet integrin αIIbß3 preventing leukocyte adhesion, which was overcome by short-term flow disturbance provoking massive adhesion; (2) that platelet-expressed CD40L controls the crawling pattern and thrombus fidelity of the cells on a thrombus; (3) that continued secretion of platelet substances promotes activation of identified neutrophils, as assessed by (fMLP [N-formylmethionyl-leucyl-phenylalanine, a potent chemotactic agent and leukocyte activator] induced) [Ca2+]i rises and antigen expression; (4) and that platelet-released chemokines activate the adhered cells in the order of CXCL7>CCL5>CXCL4. Furthermore, postsilencing of the platelets in a thrombus suppressed the leukocyte activation. However, the leukocytes on thrombi did no more than limitedly form neutrophil extracellular traps, unless stimulated with phorbol ester or lipopolysaccharide. CONCLUSIONS Together, these findings reveal a multifaceted regulation of adhesion and activation of neutrophils by platelets in a thrombus, with a balanced role of several platelet-adhesive receptors and a promoting role of platelet-released substances. This multivalent nature of neutrophil-thrombus interactions offers novel prospects for pharmacological intervention.
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Affiliation(s)
- Claudia Schönichen
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, the Netherlands (C.S., S.L.N.B., J.M.E.M.C., R.R.K., S.P.W., M.J.E.K., J.W.M.H., M.N.)
- Center for Thrombosis and Hemostasis, University Medical Center of the Johannes Gutenberg-University of Mainz, Germany (C.S., K.J.)
| | - Samantha J. Montague
- Institute of Cardiovascular Sciences, The Medical School, University of Birmingham, United Kingdom (S.J.M., S.P.W.)
| | - Sanne L.N. Brouns
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, the Netherlands (C.S., S.L.N.B., J.M.E.M.C., R.R.K., S.P.W., M.J.E.K., J.W.M.H., M.N.)
| | - James J. Burston
- Systems Immunity Research Institute, School of Medicine, Cardiff University, United Kingdom (J.J.B., V.B.O.)
| | - Judith M.E.M. Cosemans
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, the Netherlands (C.S., S.L.N.B., J.M.E.M.C., R.R.K., S.P.W., M.J.E.K., J.W.M.H., M.N.)
| | - Kerstin Jurk
- Center for Thrombosis and Hemostasis, University Medical Center of the Johannes Gutenberg-University of Mainz, Germany (C.S., K.J.)
- Department of Anaesthesiology and Intensive Care, University Hospital Muenster, Germany (K.J., B.E.K.)
| | - Beate E. Kehrel
- Department of Anaesthesiology and Intensive Care, University Hospital Muenster, Germany (K.J., B.E.K.)
| | - Rory R. Koenen
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, the Netherlands (C.S., S.L.N.B., J.M.E.M.C., R.R.K., S.P.W., M.J.E.K., J.W.M.H., M.N.)
| | - Fionnuala Ní Áinle
- School of Medicine, University College Dublin, Ireland (F.N.Á.)
- Department of Haematology, Mater Misericordiae University Hospital and Rotunda Hospital, Dublin, Ireland (F.N.Á.)
| | - Valerie B. O’Donnell
- Systems Immunity Research Institute, School of Medicine, Cardiff University, United Kingdom (J.J.B., V.B.O.)
| | - Oliver Soehnlein
- Institute for Cardiovascular Prevention, Ludwig-Maximilians-Universität München, Germany (O.S.)
- Institute for Experimental Pathology, Center for Molecular Biology of Inflammation, Westfälische Wilhelms Universität, Münster, Germany (O.S.)
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden (O.S.)
| | - Steve P. Watson
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, the Netherlands (C.S., S.L.N.B., J.M.E.M.C., R.R.K., S.P.W., M.J.E.K., J.W.M.H., M.N.)
- Institute of Cardiovascular Sciences, The Medical School, University of Birmingham, United Kingdom (S.J.M., S.P.W.)
- Centre of Membrane Proteins and Receptors (COMPARE), Universities of Birmingham and Nottingham, the Midlands, United Kingdom (S.P.W.)
| | - Marijke J.E. Kuijpers
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, the Netherlands (C.S., S.L.N.B., J.M.E.M.C., R.R.K., S.P.W., M.J.E.K., J.W.M.H., M.N.)
- Thrombosis Expertise Centre, Heart and Vascular Centre, Maastricht University Medical Centre, the Netherlands (M.J.E.K.)
| | - Johan W.M. Heemskerk
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, the Netherlands (C.S., S.L.N.B., J.M.E.M.C., R.R.K., S.P.W., M.J.E.K., J.W.M.H., M.N.)
- Synapse Research Institute, Maastricht, the Netherlands (J.W.M.H.)
| | - Magdolna Nagy
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, the Netherlands (C.S., S.L.N.B., J.M.E.M.C., R.R.K., S.P.W., M.J.E.K., J.W.M.H., M.N.)
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6
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Urquiza M, Benavides-Rubio D, Jimenez-Camacho S. Structural analysis of peptide binding to integrins for cancer detection and treatment. Biophys Rev 2023; 15:699-708. [PMID: 37681100 PMCID: PMC10480133 DOI: 10.1007/s12551-023-01084-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 06/20/2023] [Indexed: 09/09/2023] Open
Abstract
Integrins are cell receptors involved in several metabolic pathways often associated with cell proliferation. Some of these integrins are downregulated during human physical development, but when these integrins are overexpressed in adult humans, they can be associated with several diseases, such as cancer. Molecules that specifically bind to these integrins are useful for cancer detection, diagnosis, and treatment. This review focuses on the structures of integrin-peptidic ligand complexes to dissect how the binding occurs and the molecular basis of the specificity and affinity of these peptidic ligands. Understanding these interactions at the molecular level is fundamental to be able to design new peptides that are more specific and more sensitive to a particular integrin. The integrin complexes covered in this review are α5β1, αIIbβ3, αvβ3, αvβ6, and αvβ8, because the molecular structures of the complex have been experimentally determined and their presence on tumor cancer cells are associated with a poor prognosis, making them targets for cancer detection and treatment.
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Affiliation(s)
- Mauricio Urquiza
- Chemistry Department, Faculty of Sciences, Universidad Nacional de Colombia, Carrera 30# 45-03, Ciudad Universitaria, Bogotá, Colombia
| | - Daniela Benavides-Rubio
- Chemistry Department, Faculty of Sciences, Universidad Nacional de Colombia, Carrera 30# 45-03, Ciudad Universitaria, Bogotá, Colombia
| | - Silvia Jimenez-Camacho
- Chemistry Department, Faculty of Sciences, Universidad Nacional de Colombia, Carrera 30# 45-03, Ciudad Universitaria, Bogotá, Colombia
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7
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Gu Y, Dong B, He X, Qiu Z, Zhang J, Zhang M, Liu H, Pang X, Cui Y. The challenges and opportunities of αvβ3-based therapeutics in cancer: From bench to clinical trials. Pharmacol Res 2023; 189:106694. [PMID: 36775082 DOI: 10.1016/j.phrs.2023.106694] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 02/04/2023] [Accepted: 02/09/2023] [Indexed: 02/12/2023]
Abstract
Integrins are main cell adhesion receptors serving as linker attaching cells to extracellular matrix (ECM) and bidirectional hubs transmitting biochemical and mechanical signals between cells and their environment. Integrin αvβ3 is a critical family member of integrins and interacts with ECM proteins containing RGD tripeptide sequence. Accumulating evidence indicated that the abnormal expression of integrin αvβ3 was associated with various tumor progressions, including tumor initiation, sustained tumor growth, distant metastasis, drug resistance development, maintenance of stemness in cancer cells. Therefore, αvβ3 has been explored as a therapeutic target in various types of cancers, but there is no αvβ3 antagonist approved for human therapy. Targeting-integrin αvβ3 therapeutics has been a challenge, but lessons from the past are valuable to the development of innovative targeting approaches. This review systematically summarized the structure, signal transduction, regulatory role in cancer, and drug development history of integrin αvβ3, and also provided new insights into αvβ3-based therapeutics in cancer from bench to clinical trials, which would contribute to developing effective targeting αvβ3 agents for cancer treatment.
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Affiliation(s)
- Yanlun Gu
- Department of Pharmacy, Peking University First Hospital, Xishiku Street, Xicheng District, 100034 Beijing, China; Institute of Clinical Pharmacology, Peking University First Hospital, Xueyuan Road 38, Haidian District, 100191 Beijing, China; Department of Pharmacy Administration and Clinical Pharmacy, School of Pharmaceutical Sciences, Peking University, Xueyuan Road 38, Haidian District, 100191 Beijing, China
| | - Bingqi Dong
- Department of General Surgery, Peking University First Hospital, Xishiku street, Xicheng District, 100034 Beijing, China
| | - Xu He
- Department of Pharmacy, Peking University First Hospital, Xishiku Street, Xicheng District, 100034 Beijing, China; Institute of Clinical Pharmacology, Peking University First Hospital, Xueyuan Road 38, Haidian District, 100191 Beijing, China
| | - Zhiwei Qiu
- Department of Pharmacy, Peking University First Hospital, Xishiku Street, Xicheng District, 100034 Beijing, China; Institute of Clinical Pharmacology, Peking University First Hospital, Xueyuan Road 38, Haidian District, 100191 Beijing, China
| | - Juqi Zhang
- Department of Pharmacy, Peking University First Hospital, Xishiku Street, Xicheng District, 100034 Beijing, China; Institute of Clinical Pharmacology, Peking University First Hospital, Xueyuan Road 38, Haidian District, 100191 Beijing, China
| | - Mo Zhang
- Department of traditional Chinese and Western medicine,Peking University Of First Hospital, Xishiku street 8th,Xicheng District,10034 Beijing, China
| | - Haitao Liu
- Institute of Clinical Pharmacology, Peking University First Hospital, Xueyuan Road 38, Haidian District, 100191 Beijing, China
| | - Xiaocong Pang
- Department of Pharmacy, Peking University First Hospital, Xishiku Street, Xicheng District, 100034 Beijing, China; Institute of Clinical Pharmacology, Peking University First Hospital, Xueyuan Road 38, Haidian District, 100191 Beijing, China.
| | - Yimin Cui
- Department of Pharmacy, Peking University First Hospital, Xishiku Street, Xicheng District, 100034 Beijing, China; Institute of Clinical Pharmacology, Peking University First Hospital, Xueyuan Road 38, Haidian District, 100191 Beijing, China; Department of Pharmacy Administration and Clinical Pharmacy, School of Pharmaceutical Sciences, Peking University, Xueyuan Road 38, Haidian District, 100191 Beijing, China.
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8
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Wang Z, Huo T, Wu H, Moussa Z, Sen M, Dalton V. Full-length αIIbβ3 CryoEM structure reveals intact integrin initiate-activation intrinsic architecture. RESEARCH SQUARE 2023:rs.3.rs-2394542. [PMID: 36865117 PMCID: PMC9980189 DOI: 10.21203/rs.3.rs-2394542/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
Integrin αIIbβ3 is the key receptor regulating platelet retraction and accumulation, thus pivotal for hemostasis, and arterial thrombosis as well as a proven drug-target for antithrombotic therapies. Here we resolve the cryoEM structures of the intact full-length αIIbβ3, which covers three distinct states along the activation pathway. Here, we resolve intact αIIbβ3 structure at 3Å resolution, revealing the overall topology of the heterodimer with the transmembrane (TM) helices and the head region ligand-binding domain tucked in a specific angle proximity to the TM region. In response to the addition of an Mn2+ agonist, we resolved two coexisting states, "intermediate" and "pre-active". Our structures show conformational changes of the intact αIIbβ3 activating trajectory, as well as a unique twisting of the lower integrin legs representing intermediate state (TM region at a twisting conformation) integrin and a coexisting pre-active state (bent and opening in leg), which is required for inducing the transitioning platelets to accumulate. Our structure provides for the first time direct structural evidence for the lower legs' involvement in full-length integrin activation mechanisms. Additionally, our structure offers a new strategy to target the αIIbβ3 lower leg allosterically instead of modulating the affinity of the αIIbβ3 head region.
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9
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Gao Q, Sun Z, Fang D. Integrins in human hepatocellular carcinoma tumorigenesis and therapy. Chin Med J (Engl) 2023; 136:253-268. [PMID: 36848180 PMCID: PMC10106235 DOI: 10.1097/cm9.0000000000002459] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Indexed: 03/01/2023] Open
Abstract
ABSTRACT Integrins are a family of transmembrane receptors that connect the extracellular matrix and actin skeleton, which mediate cell adhesion, migration, signal transduction, and gene transcription. As a bi-directional signaling molecule, integrins can modulate many aspects of tumorigenesis, including tumor growth, invasion, angiogenesis, metastasis, and therapeutic resistance. Therefore, integrins have a great potential as antitumor therapeutic targets. In this review, we summarize the recent reports of integrins in human hepatocellular carcinoma (HCC), focusing on the abnormal expression, activation, and signaling of integrins in cancer cells as well as their roles in other cells in the tumor microenvironment. We also discuss the regulation and functions of integrins in hepatitis B virus-related HCC. Finally, we update the clinical and preclinical studies of integrin-related drugs in the treatment of HCC.
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Affiliation(s)
- Qiong Gao
- College of Basic Medical Sciences, Dalian Medical University, Dalian, Liaoning 116044, China
| | - Zhaolin Sun
- College of Basic Medical Sciences, Dalian Medical University, Dalian, Liaoning 116044, China
| | - Deyu Fang
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
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10
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Pang X, He X, Qiu Z, Zhang H, Xie R, Liu Z, Gu Y, Zhao N, Xiang Q, Cui Y. Targeting integrin pathways: mechanisms and advances in therapy. Signal Transduct Target Ther 2023; 8:1. [PMID: 36588107 PMCID: PMC9805914 DOI: 10.1038/s41392-022-01259-6] [Citation(s) in RCA: 146] [Impact Index Per Article: 146.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 11/14/2022] [Accepted: 11/21/2022] [Indexed: 01/03/2023] Open
Abstract
Integrins are considered the main cell-adhesion transmembrane receptors that play multifaceted roles as extracellular matrix (ECM)-cytoskeletal linkers and transducers in biochemical and mechanical signals between cells and their environment in a wide range of states in health and diseases. Integrin functions are dependable on a delicate balance between active and inactive status via multiple mechanisms, including protein-protein interactions, conformational changes, and trafficking. Due to their exposure on the cell surface and sensitivity to the molecular blockade, integrins have been investigated as pharmacological targets for nearly 40 years, but given the complexity of integrins and sometimes opposite characteristics, targeting integrin therapeutics has been a challenge. To date, only seven drugs targeting integrins have been successfully marketed, including abciximab, eptifibatide, tirofiban, natalizumab, vedolizumab, lifitegrast, and carotegrast. Currently, there are approximately 90 kinds of integrin-based therapeutic drugs or imaging agents in clinical studies, including small molecules, antibodies, synthetic mimic peptides, antibody-drug conjugates (ADCs), chimeric antigen receptor (CAR) T-cell therapy, imaging agents, etc. A serious lesson from past integrin drug discovery and research efforts is that successes rely on both a deep understanding of integrin-regulatory mechanisms and unmet clinical needs. Herein, we provide a systematic and complete review of all integrin family members and integrin-mediated downstream signal transduction to highlight ongoing efforts to develop new therapies/diagnoses from bench to clinic. In addition, we further discuss the trend of drug development, how to improve the success rate of clinical trials targeting integrin therapies, and the key points for clinical research, basic research, and translational research.
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Affiliation(s)
- Xiaocong Pang
- grid.411472.50000 0004 1764 1621Department of Pharmacy, Peking University First Hospital, Xishiku Street, Xicheng District, 100034 Beijing, China ,grid.411472.50000 0004 1764 1621Institute of Clinical Pharmacology, Peking University First Hospital, Xueyuan Road 38, Haidian District, 100191 Beijing, China
| | - Xu He
- grid.411472.50000 0004 1764 1621Department of Pharmacy, Peking University First Hospital, Xishiku Street, Xicheng District, 100034 Beijing, China ,grid.411472.50000 0004 1764 1621Institute of Clinical Pharmacology, Peking University First Hospital, Xueyuan Road 38, Haidian District, 100191 Beijing, China
| | - Zhiwei Qiu
- grid.411472.50000 0004 1764 1621Department of Pharmacy, Peking University First Hospital, Xishiku Street, Xicheng District, 100034 Beijing, China ,grid.411472.50000 0004 1764 1621Institute of Clinical Pharmacology, Peking University First Hospital, Xueyuan Road 38, Haidian District, 100191 Beijing, China
| | - Hanxu Zhang
- grid.411472.50000 0004 1764 1621Department of Pharmacy, Peking University First Hospital, Xishiku Street, Xicheng District, 100034 Beijing, China ,grid.411472.50000 0004 1764 1621Institute of Clinical Pharmacology, Peking University First Hospital, Xueyuan Road 38, Haidian District, 100191 Beijing, China
| | - Ran Xie
- grid.411472.50000 0004 1764 1621Department of Pharmacy, Peking University First Hospital, Xishiku Street, Xicheng District, 100034 Beijing, China ,grid.411472.50000 0004 1764 1621Institute of Clinical Pharmacology, Peking University First Hospital, Xueyuan Road 38, Haidian District, 100191 Beijing, China
| | - Zhiyan Liu
- grid.411472.50000 0004 1764 1621Department of Pharmacy, Peking University First Hospital, Xishiku Street, Xicheng District, 100034 Beijing, China ,grid.411472.50000 0004 1764 1621Institute of Clinical Pharmacology, Peking University First Hospital, Xueyuan Road 38, Haidian District, 100191 Beijing, China
| | - Yanlun Gu
- grid.411472.50000 0004 1764 1621Department of Pharmacy, Peking University First Hospital, Xishiku Street, Xicheng District, 100034 Beijing, China ,grid.411472.50000 0004 1764 1621Institute of Clinical Pharmacology, Peking University First Hospital, Xueyuan Road 38, Haidian District, 100191 Beijing, China
| | - Nan Zhao
- grid.411472.50000 0004 1764 1621Department of Pharmacy, Peking University First Hospital, Xishiku Street, Xicheng District, 100034 Beijing, China ,grid.411472.50000 0004 1764 1621Institute of Clinical Pharmacology, Peking University First Hospital, Xueyuan Road 38, Haidian District, 100191 Beijing, China
| | - Qian Xiang
- Department of Pharmacy, Peking University First Hospital, Xishiku Street, Xicheng District, 100034, Beijing, China. .,Institute of Clinical Pharmacology, Peking University First Hospital, Xueyuan Road 38, Haidian District, 100191, Beijing, China.
| | - Yimin Cui
- Department of Pharmacy, Peking University First Hospital, Xishiku Street, Xicheng District, 100034, Beijing, China. .,Institute of Clinical Pharmacology, Peking University First Hospital, Xueyuan Road 38, Haidian District, 100191, Beijing, China.
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11
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Andreani V, Ramamoorthy S, Fässler R, Grosschedl R. Integrin β1 regulates marginal zone B cell differentiation and PI3K signaling. J Exp Med 2022; 220:213672. [PMID: 36350325 PMCID: PMC9814157 DOI: 10.1084/jem.20220342] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 08/03/2022] [Accepted: 09/23/2022] [Indexed: 11/10/2022] Open
Abstract
Marginal zone (MZ) B cells represent innate-like B cells that mediate a fast immune response. The adhesion of MZ B cells to the marginal sinus of the spleen is governed by integrins. Here, we address the question of whether β1-integrin has additional functions by analyzing Itgb1fl/flCD21Cre mice in which the β1-integrin gene is deleted in mature B cells. We find that integrin β1-deficient mice have a defect in the differentiation of MZ B cells and plasma cells. We show that integrin β1-deficient transitional B cells, representing the precursors of MZ B cells, have enhanced B cell receptor (BCR) signaling, altered PI3K and Ras/ERK pathways, and an enhanced interaction of integrin-linked kinase (ILK) with the adaptor protein Grb2. Moreover, the MZ B cell defect of integrin β1-deficient mice could, at least in part, be restored by a pharmacological inhibition of the PI3K pathway. Thus, β1-integrin has an unexpected function in the differentiation and function of MZ B cells.
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Affiliation(s)
- Virginia Andreani
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany,Institute for Immunodeficiency, Center for Chronic Immunodeficiency, Medical Center, University of Freiburg, Freiburg, Germany,Virginia Andreani:
| | - Senthilkumar Ramamoorthy
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany,Institute of Medical Bioinformatics and Systems Medicine, Medical Center, University of Freiburg, Freiburg, Germany,Division of Pediatric Hematology and Oncology, Department of Pediatrics and Adolescent Medicine, Medical Center, University of Freiburg, Freiburg, Germany
| | | | - Rudolf Grosschedl
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany,Correspondence to Rudolf Grosschedl:
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12
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Takada YK, Fujita M, Takada Y. Pro-Inflammatory Chemokines CCL5, CXCL12, and CX3CL1 Bind to and Activate Platelet Integrin αIIbβ3 in an Allosteric Manner. Cells 2022; 11:cells11193059. [PMID: 36231020 PMCID: PMC9563052 DOI: 10.3390/cells11193059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 09/23/2022] [Accepted: 09/24/2022] [Indexed: 11/16/2022] Open
Abstract
Activation of platelet integrin αIIbβ3, a key event for hemostasis and thrombus formation, is known to be mediated exclusively by inside-out signaling. We showed that inflammatory chemokines CX3CL1 and CXCL12 in previous studies, and CCL5 in this study, bound to the allosteric binding site (site 2) of vascular integrin αvβ3, in addition to the classical ligand binding site (site 1), and allosterically activated integrins independent of inside-out signaling. Since αIIbβ3 is exposed to inflammatory chemokines at increased concentrations during inflammation (e.g., cytokine/chemokine storm) and platelet activation, we hypothesized that these chemokines bind to and activate αIIbβ3 in an allosteric activation mechanism. We found that these chemokines bound to αIIbβ3. Notably, they activated soluble αIIbβ3 in 1 mM Ca2+ by binding to site 2. They activated cell-surface αIIbβ3 on CHO cells, which lack machinery for inside-out signaling or chemokine receptors, quickly (<1 min) and at low concentrations (1–10 ng/mL) compared to activation of soluble αIIbβ3, probably because chemokines bind to cell surface proteoglycans. Furthermore, activation of αIIbβ3 by the chemokines was several times more potent than 1 mM Mn2+. We propose that CCL5 and CXCL12 (stored in platelet granules) may allosterically activate αIIbβ3 upon platelet activation and trigger platelet aggregation. Transmembrane CX3CL1 on activated endothelial cells may mediate platelet–endothelial interaction by binding to and activating αIIbβ3. Additionally, these chemokines in circulation over-produced during inflammation may trigger αIIbβ3 activation, which is a possible missing link between inflammation and thrombosis.
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Affiliation(s)
- Yoko K. Takada
- Department of Dermatology, School of Medicine, University of California–Davis, 4645 Second Ave., Research III Suite 3300, Sacramento, CA 95817, USA
- Department of Biochemistry and Molecular Medicine, University of California Davis School of Medicine, Sacramento, CA 95817, USA
| | - Masaaki Fujita
- Department of Dermatology, School of Medicine, University of California–Davis, 4645 Second Ave., Research III Suite 3300, Sacramento, CA 95817, USA
| | - Yoshikazu Takada
- Department of Dermatology, School of Medicine, University of California–Davis, 4645 Second Ave., Research III Suite 3300, Sacramento, CA 95817, USA
- Department of Biochemistry and Molecular Medicine, University of California Davis School of Medicine, Sacramento, CA 95817, USA
- Correspondence:
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13
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Adherens junctions stimulate and spatially guide integrin activation and extracellular matrix deposition. Cell Rep 2022; 40:111091. [PMID: 35858563 DOI: 10.1016/j.celrep.2022.111091] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 05/04/2022] [Accepted: 06/22/2022] [Indexed: 11/03/2022] Open
Abstract
Cadherins and integrins are intrinsically linked through the actin cytoskeleton and are largely responsible for the mechanical integrity and organization of tissues. We show that cadherin clustering stimulates and spatially guides integrin activation. Adherens junction (AJ)-associated integrin activation depends on locally generated tension and does not require extracellular matrix ligands. It leads to the creation of primed integrin clusters, which spatially determine where focal adhesions will form if ligands are present and where ligands will be deposited. AJs that display integrin activation are targeted by microtubules facilitating their disassembly via caveolin-based endocytosis, showing that integrin activation impacts the stability of the core cadherin complex. Thus, the interplay between cadherins and integrins is more intimate than what was once believed and is rooted in the capacity of active integrins to be stabilized via AJ-generated tension. Altogether, our data establish a mechanism of cross-regulation between cadherins and integrins.
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14
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Rodriguez JE, Naigeon M, Goldschmidt V, Roulleaux Dugage M, Seknazi L, Danlos FX, Champiat S, Marabelle A, Michot JM, Massard C, Besse B, Ferrara R, Chaput N, Baldini C. Immunosenescence, inflammaging, and cancer immunotherapy efficacy. Expert Rev Anticancer Ther 2022; 22:915-926. [PMID: 35815381 DOI: 10.1080/14737140.2022.2098718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION Immunosenescence is a progressive remodeling of immune functions associated with a decreased ability of the immune system to set up an efficient immune response, both innate and adaptive, with an increase of highly differentiated T cells at the expense of naive T cells. The incidence and prevalence of most cancers increase with age, which can partly be explained by tumor escape mechanisms and decreased immunosurveillance. Aging is also associated with inflammaging, a low-grade proinflammatory state characterized by an increase in inflammatory mediators. Anti-cancer immunotherapy has profoundly changed the landscape of oncology therapy in the last 10 years. Modern T-cell targeted therapies such as bispecific T cell engagers, CAR-T cells, or immune checkpoint blockers may be theoretically affected by immunosenescence or inflammaging. AREAS COVERED A bibliographic review through PubMed and Embase was carried out using the following search terms: 'immunosenescence,' 'immunotherapy,' 'inflammaging,' 'bispecific antibodies,' 'CAR-T cells,' 'immune checkpoint blockers,' and 'older patients.' EXPERT OPINION This review explores the potential impact of immunosenescence and inflammaging on anti-cancer immunotherapy and therapeutic strategies that could counter immune senescence. A more dedicated research on immunosenescence biomarkers in future clinical trials is warranted for the development of new, more effective and safer therapies.
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Affiliation(s)
- Julieta E Rodriguez
- Drug Development Department, Gustave Roussy Cancer Campus, Villejuif, France
| | - Marie Naigeon
- Laboratory of Immunomonitoring in Oncology, Gustave Roussy Cancer Campus, Villejuif, France.,School of Medicine, Paris-Saclay university, Kremlin Bicêtre, France.,School of Pharmacy, Paris-Saclay University, Chatenay, France
| | - Vincent Goldschmidt
- Drug Development Department, Gustave Roussy Cancer Campus, Villejuif, France
| | - Matthieu Roulleaux Dugage
- Drug Development Department, Gustave Roussy Cancer Campus, Villejuif, France.,Laboratory of Immunomonitoring in Oncology, Gustave Roussy Cancer Campus, Villejuif, France.,Department of Cancer Medicine, Gustave Roussy Cancer Campus, Villejuif, France
| | - Lauren Seknazi
- Drug Development Department, Gustave Roussy Cancer Campus, Villejuif, France
| | - Francois X Danlos
- Drug Development Department, Gustave Roussy Cancer Campus, Villejuif, France
| | - Stephane Champiat
- Drug Development Department, Gustave Roussy Cancer Campus, Villejuif, France
| | - Aurélien Marabelle
- Drug Development Department, Gustave Roussy Cancer Campus, Villejuif, France
| | - Jean-Marie Michot
- Drug Development Department, Gustave Roussy Cancer Campus, Villejuif, France
| | - Christophe Massard
- Drug Development Department, Gustave Roussy Cancer Campus, Villejuif, France
| | - Benjamin Besse
- School of Medicine, Paris-Saclay university, Kremlin Bicêtre, France.,Department of Cancer Medicine, Gustave Roussy Cancer Campus, Villejuif, France
| | - Roberto Ferrara
- Department of Cancer Medicine, Gustave Roussy Cancer Campus, Villejuif, France.,Department of Medical Oncology, Thoracic Oncology Unit, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Italy.,Department of Research, Molecular Immunology Unit, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Italy
| | - Nathalie Chaput
- Laboratory of Immunomonitoring in Oncology, Gustave Roussy Cancer Campus, Villejuif, France.,School of Pharmacy, Paris-Saclay University, Chatenay, France
| | - Capucine Baldini
- Drug Development Department, Gustave Roussy Cancer Campus, Villejuif, France.,Laboratory of Immunomonitoring in Oncology, Gustave Roussy Cancer Campus, Villejuif, France
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15
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Solubilization and Purification of α 5β 1 Integrin from Rat Liver for Reconstitution into Nanodiscs. METHODS IN MOLECULAR BIOLOGY (CLIFTON, N.J.) 2022; 2507:1-18. [PMID: 35773574 DOI: 10.1007/978-1-0716-2368-8_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Transmembrane proteins (or integral membrane proteins) are synthesized in the endoplasmic reticulum where most of them are core glycosylated prior to folding and in some cases assembly into quaternary structures. Correctly glycosylated, folded, and assembled transmembrane proteins are then shuttled to the Golgi apparatus for additional posttranslational modifications such as complex-type glycosylations, sulfation or proteolytic clipping. At the plasma membrane, the glycosylated extracellular domains are key to communicate with the cellular environment for a variety of functions, such as binding to the extracellular matrix for cell adhesion and migration, to neighboring cells for cell-cell interaction, or to extracellular components for nutrient uptake and cell signaling. Intracellular domains are essential to mediate signaling cascades, or to connect to cytosolic adaptors for internalization and intracellular compartmentalization. Despite its importance for the understanding of molecular mechanisms of transmembrane protein function, the determination of their structures has remained a challenging task. In recent years, their reconstitution in lipid nanodiscs in combination with high resolution cryo-electron microscopy has provided novel avenues to render this process more accessible. Here, we describe detailed protocols for the solubilization of heavily glycosylated α5β1 integrin from rat livers, its purification and reconstitution into nanodiscs. At the plasma membrane of many cells, including tumor metastases, this essential heterodimeric transmembrane protein mediates the communication between extracellular matrix and cytosolic cytoskeleton in processes of cell adhesion and migration. We expect that the protocols that are described here will provide new opportunities for the determination of the full structure of α5β1 integrin, as well as for the understanding of how interacting partners can regulate function and activity of this transmembrane protein.
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16
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Lu F, Zhu L, Bromberger T, Yang J, Yang Q, Liu J, Plow EF, Moser M, Qin J. Mechanism of integrin activation by talin and its cooperation with kindlin. Nat Commun 2022; 13:2362. [PMID: 35488005 PMCID: PMC9054839 DOI: 10.1038/s41467-022-30117-w] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 04/15/2022] [Indexed: 12/12/2022] Open
Abstract
Talin-induced integrin binding to extracellular matrix ligands (integrin activation) is the key step to trigger many fundamental cellular processes including cell adhesion, cell migration, and spreading. Talin is widely known to use its N-terminal head domain (talin-H) to bind and activate integrin, but how talin-H operates in the context of full-length talin and its surrounding remains unknown. Here we show that while being capable of inducing integrin activation, talin-H alone exhibits unexpectedly low potency versus a constitutively activated full-length talin. We find that the large C-terminal rod domain of talin (talin-R), which otherwise masks the integrin binding site on talin-H in inactive talin, dramatically enhances the talin-H potency by dimerizing activated talin and bridging it to the integrin co-activator kindlin-2 via the adaptor protein paxillin. These data provide crucial insight into the mechanism of talin and its cooperation with kindlin to promote potent integrin activation, cell adhesion, and signaling.
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Affiliation(s)
- Fan Lu
- Department of Cardiovascular & Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Ave., Cleveland, OH, 44195, USA
- Department of Biochemistry, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Liang Zhu
- Department of Cardiovascular & Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Ave., Cleveland, OH, 44195, USA
| | - Thomas Bromberger
- Institute of Experimental Hematology, School of Medicine, Technische Universität München, Munich, D-81675, Germany
| | - Jun Yang
- Department of Cardiovascular & Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Ave., Cleveland, OH, 44195, USA
| | - Qiannan Yang
- Department of Cardiovascular & Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Ave., Cleveland, OH, 44195, USA
| | - Jianmin Liu
- Department of Cardiovascular & Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Ave., Cleveland, OH, 44195, USA
| | - Edward F Plow
- Department of Cardiovascular & Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Ave., Cleveland, OH, 44195, USA
| | - Markus Moser
- Institute of Experimental Hematology, School of Medicine, Technische Universität München, Munich, D-81675, Germany.
| | - Jun Qin
- Department of Cardiovascular & Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Ave., Cleveland, OH, 44195, USA.
- Department of Biochemistry, Case Western Reserve University, Cleveland, OH, 44106, USA.
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17
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Ripamonti M, Wehrle-Haller B, de Curtis I. Paxillin: A Hub for Mechano-Transduction from the β3 Integrin-Talin-Kindlin Axis. Front Cell Dev Biol 2022; 10:852016. [PMID: 35450290 PMCID: PMC9016114 DOI: 10.3389/fcell.2022.852016] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 03/14/2022] [Indexed: 01/11/2023] Open
Abstract
Focal adhesions are specialized integrin-dependent adhesion complexes, which ensure cell anchoring to the extracellular matrix. Focal adhesions also function as mechano-signaling platforms by perceiving and integrating diverse physical and (bio)chemical cues of their microenvironment, and by transducing them into intracellular signaling for the control of cell behavior. The fundamental biological mechanism of creating intracellular signaling in response to changes in tensional forces appears to be tightly linked to paxillin recruitment and binding to focal adhesions. Interestingly, the tension-dependent nature of the paxillin binding to adhesions, combined with its scaffolding function, suggests a major role of this protein in integrating multiple signals from the microenvironment, and accordingly activating diverse molecular responses. This minireview offers an overview of the molecular bases of the mechano-sensitivity and mechano-signaling capacity of core focal adhesion proteins, and highlights the role of paxillin as a key component of the mechano-transducing machinery based on the interaction of cells to substrates activating the β3 integrin-talin1-kindlin.
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Affiliation(s)
- Marta Ripamonti
- Division of Neuroscience, San Raffaele Scientific Institute and Vita-Salute San Raffaele University, Milano, Italy
| | - Bernhard Wehrle-Haller
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire, Geneva, Switzerland
| | - Ivan de Curtis
- Division of Neuroscience, San Raffaele Scientific Institute and Vita-Salute San Raffaele University, Milano, Italy
- *Correspondence: Ivan de Curtis,
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18
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Zhang B, Fan M, Fan J, Luo Y, Wang J, Wang Y, Liu B, Sun Y, Zhao Q, Hiscox JA, Nan Y, Zhou EM. Avian Hepatitis E Virus ORF2 Protein Interacts with Rap1b to Induce Cytoskeleton Rearrangement That Facilitates Virus Internalization. Microbiol Spectr 2022; 10:e0226521. [PMID: 35138149 PMCID: PMC8826821 DOI: 10.1128/spectrum.02265-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 01/05/2022] [Indexed: 12/31/2022] Open
Abstract
Avian hepatitis E virus (HEV) causes liver diseases and multiple extrahepatic disorders in chickens. However, the mechanisms involved in avian HEV entry remain elusive. Herein, we identified the RAS-related protein 1b (Rap1b) as a potential HEV-ORF2 protein interacting candidate. Experimental infection of chickens and cells with an avian HEV isolate from China (CaHEV) led to upregulated expression and activation of Rap1b both in vivo and in vitro. By using CaHEV capsid as mimic of virion to treat cell in vitro, it appears that the interaction between the viral capsid and Rap1b promoted cell membrane recruitment of the downstream effector Rap1-interacting molecule (RIAM). In turn, RIAM further enhanced Talin-1 membrane recruitment and retention, which led to the activation of integrin α5/β1, as well as integrin-associated membrane protein kinases, including focal adhesion kinase (FAK). Meanwhile, FAK activation triggered activation of downstream signaling molecules, such as Ras-related C3 botulinum toxin substrate 1 RAC1 cell division cycle 42 (CDC42), p21-activated kinase 1 (PAK1), and LIM domain kinase 1 (LIMK1). Finally, F-actin rearrangement induced by Cofilin led to the formation of lamellipodia, filopodia, and stress fibers, contributes to plasma membrane remodeling, and might enhance CaHEV virion internalization. In conclusion, our data suggested that Rap1b activation was triggered during CaHEV infection and appeared to require interaction between CaHEV-ORF2 and Rap1b, thereby further inducing membrane recruitment of Talin-1. Membrane-bound Talin-1 then activates key Integrin-FAK-Cofilin cascades involved in modulation of actin kinetics, and finally leads to F-actin rearrangement and membrane remodeling to potentially facilitate internalization of CaHEV virions into permissive cells. IMPORTANCE Rap1b is a multifunctional protein that is responsible for cell adhesion, growth, and differentiation. The inactive form of Rap1b is phosphorylated and distributed in the cytoplasm, while active Rap1b is prenylated and loaded with GTP to the cell membrane. In this study, the activation of Rap1b was induced during the early stage of avian HEV infection under the regulation of PKA and SmgGDS. Continuously activated Rap1b recruited its effector RIAM to the membrane, thereby inducing the membrane recruitment of Talin-1 that led to the activation of membrane α5/β1 integrins. The triggering of the signaling pathway-associated Integrin α5/β1-FAK-CDC42&RAC1-PAK1-LIMK1-Cofilin culminated in F-actin polymerization and membrane remodeling that might promote avian HEV virion internalization. These findings suggested a novel mechanism that is potentially utilized by avian HEV to invade susceptible cells.
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Affiliation(s)
- Beibei Zhang
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Mengnan Fan
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Jie Fan
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Yuhang Luo
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Jie Wang
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Yajing Wang
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Baoyuan Liu
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Yani Sun
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Qin Zhao
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Julian A. Hiscox
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Yuchen Nan
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - En-Min Zhou
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
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19
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Benk LT, Benk AS, Lira RB, Cavalcanti-Adam EA, Dimova R, Lipowsky R, Geiger B, Spatz JP. Integrin α
IIb
β
3
Activation and Clustering in Minimal Synthetic Cells. ADVANCED NANOBIOMED RESEARCH 2022. [DOI: 10.1002/anbr.202100094] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Affiliation(s)
- Lucia T. Benk
- Department of Cellular Biophysics Max Planck Institute for Medical Research Jahnstr. 29 69120 Heidelberg Germany
| | - Amelie S. Benk
- Department of Cellular Biophysics Max Planck Institute for Medical Research Jahnstr. 29 69120 Heidelberg Germany
| | - Rafael B. Lira
- Theory & Bio-Systems Max Planck Institute of Colloids and Interfaces 14424 Potsdam Germany
- Faculty of Science and Engineering Molecular Biophysics Zernike Institute for Advanced Materials 9747 AG Groningen The Netherlands
| | - Elisabetta Ada Cavalcanti-Adam
- Department of Cellular Biophysics Max Planck Institute for Medical Research Jahnstr. 29 69120 Heidelberg Germany
- Max Planck School Matter to Life Jahnstr. 29 69120 Heidelberg Germany
| | - Rumiana Dimova
- Theory & Bio-Systems Max Planck Institute of Colloids and Interfaces 14424 Potsdam Germany
| | - Reinhard Lipowsky
- Theory & Bio-Systems Max Planck Institute of Colloids and Interfaces 14424 Potsdam Germany
- Max Planck School Matter to Life Jahnstr. 29 69120 Heidelberg Germany
| | - Benjamin Geiger
- Department of Molecular Cell Biology Weizmann Institute of Science Rehovot 76100 Israel
| | - Joachim P. Spatz
- Department of Cellular Biophysics Max Planck Institute for Medical Research Jahnstr. 29 69120 Heidelberg Germany
- Max Planck School Matter to Life Jahnstr. 29 69120 Heidelberg Germany
- Institute for Molecular Systems Engineering (IMSE) Heidelberg University 69120 Heidelberg Germany
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20
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Li Q, Lan T, Xie J, Lu Y, Zheng D, Su B. Integrin-Mediated Tumorigenesis and Its Therapeutic Applications. Front Oncol 2022; 12:812480. [PMID: 35223494 PMCID: PMC8873568 DOI: 10.3389/fonc.2022.812480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 01/17/2022] [Indexed: 11/13/2022] Open
Abstract
Integrins, a family of adhesion molecules generally exist on the cell surface, are essential for regulating cell growth and its function. As a bi-directional signaling molecule, they mediate cell-cell and cell-extracellular matrix interaction. The recognitions of their key roles in many human pathologies, including autoimmunity, thrombosis and neoplasia, have revealed their great potential as a therapeutic target. This paper focuses on the activation of integrins, the role of integrins in tumorigenesis and progression, and advances of integrin-dependent tumor therapeutics in recent years. It is expected that understanding function and signaling transmission will fully exploit potentialities of integrin as a novel target for tumors.
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Affiliation(s)
- Qingling Li
- Fujian Key Laboratory of Oral Diseases, Fujian Provincial Engineering Research Center of Oral Biomaterial, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
- Department of Preventive Dentistry, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Ting Lan
- Fujian Key Laboratory of Oral Diseases, Fujian Provincial Engineering Research Center of Oral Biomaterial, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Jian Xie
- Fujian Key Laboratory of Oral Diseases, Fujian Provincial Engineering Research Center of Oral Biomaterial, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
- Department of Preventive Dentistry, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Youguang Lu
- Fujian Key Laboratory of Oral Diseases, Fujian Provincial Engineering Research Center of Oral Biomaterial, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
- Department of Preventive Dentistry, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Dali Zheng
- Fujian Key Laboratory of Oral Diseases, Fujian Provincial Engineering Research Center of Oral Biomaterial, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
- *Correspondence: Dali Zheng, ; Bohua Su,
| | - Bohua Su
- Fujian Key Laboratory of Oral Diseases, Fujian Provincial Engineering Research Center of Oral Biomaterial, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
- Department of Preventive Dentistry, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
- *Correspondence: Dali Zheng, ; Bohua Su,
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21
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Anderson JM, Li J, Springer TA. Regulation by metal ions and the ADMIDAS of integrin α5β1 conformational states and intrinsic affinities. Mol Biol Cell 2022; 33:ar56. [PMID: 35108026 PMCID: PMC9265148 DOI: 10.1091/mbc.e21-11-0536] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Activation of integrins by Mn2+ is a benchmark in the integrin field, but how Mn2+ works and whether it reproduces physiological activation is unknown. We show that Mn2+ and high Mg2+ concentrations compete with Ca2+ at the ADMIDAS and shift the conformational equilibrium toward the open state, but the shift is far from complete. Additionally, replacement of Mg2+ by Mn2+ at the MIDAS increases the intrinsic affinities of both the high-affinity open and low-affinity closed states of integrins, in agreement with stronger binding of Mn2+ than Mg2+ to oxygen atoms. Mutation of the ADMIDAS increases the affinity of closed states and decreases the affinity of the open state and thus reduces the difference in affinity between the open and closed states. An important biological function of the ADMIDAS may be to stabilize integrins in highly discrete states, so that when integrins support cell adhesion and migration, their high and low affinity correspond to discrete on and off states, respectively.
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Affiliation(s)
- Jordan M Anderson
- Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston MA 02115.,Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston MA 02115
| | - Jing Li
- Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston MA 02115.,Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston MA 02115
| | - Timothy A Springer
- Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston MA 02115.,Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston MA 02115
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22
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Simons P, Rinaldi DA, Bondu V, Kell AM, Bradfute S, Lidke DS, Buranda T. Integrin activation is an essential component of SARS-CoV-2 infection. Sci Rep 2021; 11:20398. [PMID: 34650161 PMCID: PMC8516859 DOI: 10.1038/s41598-021-99893-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 09/30/2021] [Indexed: 02/07/2023] Open
Abstract
SARS-CoV-2 infection depends on binding its spike (S) protein to angiotensin-converting enzyme 2 (ACE2). The S protein expresses an RGD motif, suggesting that integrins may be co-receptors. Here, we UV-inactivated SARS-CoV-2 and fluorescently labeled the envelope membrane with octadecyl rhodamine B (R18) to explore the role of integrin activation in mediating cell entry and productive infection. We used flow cytometry and confocal microscopy to show that SARS-CoV-2R18 particles engage basal-state integrins. Furthermore, we demonstrate that Mn2+, which induces integrin extension, enhances cell entry of SARS-CoV-2R18. We also show that one class of integrin antagonist, which binds to the αI MIDAS site and stabilizes the inactive, closed conformation, selectively inhibits the engagement of SARS-CoV-2R18 with basal state integrins, but is ineffective against Mn2+-activated integrins. RGD-integrin antagonists inhibited SARS-CoV-2R18 binding regardless of integrin activation status. Integrins transmit signals bidirectionally: 'inside-out' signaling primes the ligand-binding function of integrins via a talin-dependent mechanism, and 'outside-in' signaling occurs downstream of integrin binding to macromolecular ligands. Outside-in signaling is mediated by Gα13. Using cell-permeable peptide inhibitors of talin and Gα13 binding to the cytoplasmic tail of an integrin's β subunit, we demonstrate that talin-mediated signaling is essential for productive infection.
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Affiliation(s)
- Peter Simons
- Department of Pathology, University of New Mexico School of Medicine, Albuquerque, NM, 87131, USA
| | - Derek A Rinaldi
- Department of Pathology, University of New Mexico School of Medicine, Albuquerque, NM, 87131, USA
| | - Virginie Bondu
- Molecular Genetics and Microbiology, University of New Mexico School of Medicine, Albuquerque, NM, 87131, USA
| | - Alison M Kell
- Molecular Genetics and Microbiology, University of New Mexico School of Medicine, Albuquerque, NM, 87131, USA
- Center for Infectious Diseases and Immunity, University of New Mexico School of Medicine, Albuquerque, NM, 87131, USA
| | - Steven Bradfute
- Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, NM, 87131, USA
- Center for Infectious Diseases and Immunity, University of New Mexico School of Medicine, Albuquerque, NM, 87131, USA
| | - Diane S Lidke
- Department of Pathology, University of New Mexico School of Medicine, Albuquerque, NM, 87131, USA
- Comprehensive Cancer Center, University of New Mexico Health Sciences Center, Albuquerque, NM, 87131, USA
| | - Tione Buranda
- Department of Pathology, University of New Mexico School of Medicine, Albuquerque, NM, 87131, USA.
- Center for Infectious Diseases and Immunity, University of New Mexico School of Medicine, Albuquerque, NM, 87131, USA.
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23
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Peterson RJ, Koval M. Above the Matrix: Functional Roles for Apically Localized Integrins. Front Cell Dev Biol 2021; 9:699407. [PMID: 34485286 PMCID: PMC8414885 DOI: 10.3389/fcell.2021.699407] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 07/23/2021] [Indexed: 12/14/2022] Open
Abstract
Integrins are transmembrane proteins that are most typically thought of as integrating adhesion to the extracellular matrix with intracellular signaling and cell regulation. Traditionally, integrins are found at basolateral and lateral cell surfaces where they facilitate binding to the ECM and intercellular adhesion through cytosolic binding partners that regulate organization of actin microfilaments. However, evidence is accumulating that integrins also are apically localized, either endogenously or due to an exogenous stimulus. Apically localized integrins have been shown to regulate several processes by interacting with proteins such as connexins, tight junction proteins, and polarity complex proteins. Integrins can also act as receptors to mediate endocytosis. Here we review these newly appreciated roles for integrins localized to the apical cell surface.
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Affiliation(s)
- Raven J Peterson
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA, United States
| | - Michael Koval
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA, United States.,Department of Cell Biology, Emory University School of Medicine, Atlanta, GA, United States
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24
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Nguyen GT, Xu S, Adams W, Leong JM, Bunnell SC, Mansour MK, Sykes DB, Mecsas J. Neutrophils require SKAP2 for reactive oxygen species production following C-type lectin and Candida stimulation. iScience 2021; 24:102871. [PMID: 34386732 PMCID: PMC8346660 DOI: 10.1016/j.isci.2021.102871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 06/03/2021] [Accepted: 07/14/2021] [Indexed: 11/29/2022] Open
Abstract
Signaling cascades converting the recognition of pathogens to efficient inflammatory responses by neutrophils are critical for host survival. SKAP2, an adaptor protein, is required for reactive oxygen species (ROS) generation following neutrophil stimulation by integrins, formyl peptide receptors, and for host defense against the Gram-negative bacterial pathogens, Klebsiella pneumoniae and Yersinia pseudotuberculosis. Using neutrophils from murine HoxB8-immortalized progenitors, we show that SKAP2 in neutrophils is crucial for maximal ROS response to purified C-type lectin receptor agonists and to the fungal pathogens, Candida glabrata and Candida albicans, and for robust killing of C. glabrata. Inside-out signaling to integrin and Syk phosphorylation occurred independently of SKAP2 after Candida infection. However, Pyk2, ERK1/2, and p38 phosphorylation were significantly reduced after infection with C. glabrata and K. pneumoniae in Skap2-/- neutrophils. These data demonstrate the importance of SKAP2 in ROS generation and host defense beyond antibacterial immunity to include CLRs and Candida species.
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Affiliation(s)
- Giang T. Nguyen
- Graduate Program in Immunology, Tufts Graduate School of Biomedical Sciences, Boston, MA 02111, USA
| | - Shuying Xu
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Walter Adams
- Department of Molecular Biology and Microbiology, School of Medicine, Tufts University, Boston, MA 02111, USA
| | - John M. Leong
- Graduate Program in Immunology, Tufts Graduate School of Biomedical Sciences, Boston, MA 02111, USA
- Department of Molecular Biology and Microbiology, School of Medicine, Tufts University, Boston, MA 02111, USA
| | - Stephen C. Bunnell
- Graduate Program in Immunology, Tufts Graduate School of Biomedical Sciences, Boston, MA 02111, USA
- Department of Immunology, School of Medicine, Tufts University, Boston, MA 02111, USA
| | - Michael K. Mansour
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA 02114, USA
- Department of Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
- Harvard Medical School, Boston, MA 02115, USA
| | - David B. Sykes
- Department of Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
- Harvard Medical School, Boston, MA 02115, USA
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
- Harvard Stem Cell Institute, Cambridge, MA 02115, USA
| | - Joan Mecsas
- Graduate Program in Immunology, Tufts Graduate School of Biomedical Sciences, Boston, MA 02111, USA
- Department of Molecular Biology and Microbiology, School of Medicine, Tufts University, Boston, MA 02111, USA
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25
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Simons P, Rinaldi DA, Bondu V, Kell AM, Bradfute S, Lidke D, Buranda T. Integrin activation is an essential component of SARS-CoV-2 infection. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2021. [PMID: 34312625 DOI: 10.1101/2021.07.20.453118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Cellular entry of coronaviruses depends on binding of the viral spike (S) protein to a specific cellular receptor, the angiotensin-converting enzyme 2 (ACE2). Furthermore, the viral spike protein expresses an RGD motif, suggesting that cell surface integrins may be attachment co-receptors. However, using infectious SARS-CoV-2 requires a biosafety level 3 laboratory (BSL-3), which limits the techniques that can be used to study the mechanism of cell entry. Here, we UV-inactivated SARS-CoV-2 and fluorescently labeled the envelope membrane with octadecyl rhodamine B (R18) to explore the role of integrin activation in mediating both cell entry and productive infection. We used flow cytometry and confocal fluorescence microscopy to show that fluorescently labeled SARS-CoV-2 R18 particles engage basal-state integrins. Furthermore, we demonstrate that Mn 2+ , which activates integrins and induces integrin extension, enhances cell binding and entry of SARS-CoV-2 R18 in proportion to the fraction of integrins activated. We also show that one class of integrin antagonist, which binds to the αI MIDAS site and stabilizes the inactive, closed conformation, selectively inhibits the engagement of SARS-CoV-2 R18 with basal state integrins, but is ineffective against Mn 2+ -activated integrins. At the same time, RGD-integrin antagonists inhibited SARS-CoV-2 R18 binding regardless of integrin activity state. Integrins transmit signals bidirectionally: 'inside-out' signaling primes the ligand binding function of integrins via a talin dependent mechanism and 'outside-in' signaling occurs downstream of integrin binding to macromolecular ligands. Outside-in signaling is mediated by Gα 13 and induces cell spreading, retraction, migration, and proliferation. Using cell-permeable peptide inhibitors of talin, and Gα 13 binding to the cytoplasmic tail of an integrin's β subunit, we further demonstrate that talin-mediated signaling is essential for productive infection by SARS-CoV-2.
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26
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Morcillo P, Cordero H, Ijomone OM, Ayodele A, Bornhorst J, Gunther L, Macaluso FP, Bowman AB, Aschner M. Defective Mitochondrial Dynamics Underlie Manganese-Induced Neurotoxicity. Mol Neurobiol 2021; 58:3270-3289. [PMID: 33666854 PMCID: PMC9009155 DOI: 10.1007/s12035-021-02341-w] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 02/23/2021] [Indexed: 12/17/2022]
Abstract
Perturbations in mitochondrial dynamics have been observed in most neurodegenerative diseases. Here, we focus on manganese (Mn)-induced Parkinsonism-like neurodegeneration, a disorder associated with the preferential of Mn in the basal ganglia where the mitochondria are considered an early target. Despite the extensive characterization of the clinical presentation of manganism, the mechanism by which Mn mediated mitochondrial toxicity is unclear. In this study we hypothesized whether Mn exposure alters mitochondrial activity, including axonal transport of mitochondria and mitochondrial dynamics, morphology, and network. Using primary neuron cultures exposed to 100 μM Mn (which is considered the threshold of Mn toxicity in vitro) and intraperitoneal injections of MnCl2 (25mg/kg) in rat, we observed that Mn increased mitochondrial fission mediated by phosphorylation of dynamin-related protein-1 at serine 616 (p-s616-DRP1) and decreased mitochondrial fusion proteins (MFN1 and MFN2) leading to mitochondrial fragmentation, defects in mitochondrial respiratory capacity, and mitochondrial ultrastructural damage in vivo and in vitro. Furthermore, Mn exposure impaired mitochondrial trafficking by decreasing dynactin (DCTN1) and kinesin-1 (KIF5B) motor proteins and increasing destabilization of the cytoskeleton at protein and gene levels. In addition, mitochondrial communication may also be altered by Mn exposure, increasing the length of nanotunnels to reach out distal mitochondria. These findings revealed an unrecognized role of Mn in dysregulation of mitochondrial dynamics providing a potential explanation of early hallmarks of the disorder, as well as a possible common pathway with neurological disorders arising upon chronic Mn exposure.
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Affiliation(s)
- Patricia Morcillo
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA.
| | - Hector Cordero
- Columbia Center for Translational Immunology, Columbia University Medical Center, New York, NY, USA
| | - Omamuyovwi M Ijomone
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA
- The Neuro-Lab, School of Health and Health Technology, Federal University of Technology, Akure, Nigeria
| | - Akinyemi Ayodele
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Julia Bornhorst
- Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
| | - Leslie Gunther
- Analytical Imaging Facility, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Frank P Macaluso
- Analytical Imaging Facility, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Aaron B Bowman
- School of Health Sciences, Purdue University, West Lafayette, IN, USA
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA.
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27
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Sun H, Zhi K, Hu L, Fan Z. The Activation and Regulation of β2 Integrins in Phagocytes and Phagocytosis. Front Immunol 2021; 12:633639. [PMID: 33868253 PMCID: PMC8044391 DOI: 10.3389/fimmu.2021.633639] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 03/11/2021] [Indexed: 01/10/2023] Open
Abstract
Phagocytes, which include neutrophils, monocytes, macrophages, and dendritic cells, protect the body by removing foreign particles, bacteria, and dead or dying cells. Phagocytic integrins are greatly involved in the recognition of and adhesion to specific antigens on cells and pathogens during phagocytosis as well as the recruitment of immune cells. β2 integrins, including αLβ2, αMβ2, αXβ2, and αDβ2, are the major integrins presented on the phagocyte surface. The activation of β2 integrins is essential to the recruitment and phagocytic function of these phagocytes and is critical for the regulation of inflammation and immune defense. However, aberrant activation of β2 integrins aggravates auto-immune diseases, such as psoriasis, arthritis, and multiple sclerosis, and facilitates tumor metastasis, making them double-edged swords as candidates for therapeutic intervention. Therefore, precise regulation of phagocyte activities by targeting β2 integrins should promote their host defense functions with minimal side effects on other cells. Here, we reviewed advances in the regulatory mechanisms underlying β2 integrin inside-out signaling, as well as the roles of β2 integrin activation in phagocyte functions.
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Affiliation(s)
- Hao Sun
- Department of Medicine, University of California, San Diego, La Jolla, CA, United States
| | - Kangkang Zhi
- Department of Vascular Surgery, Changzheng Hospital, Shanghai, China
| | - Liang Hu
- Department of Cardiology, Cardiovascular Institute of Zhengzhou University, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Zhichao Fan
- Department of Immunology, School of Medicine, UConn Health, Farmington, CT, United States
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28
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Exogenous Integrin αIIbβ3 Inhibitors Revisited: Past, Present and Future Applications. Int J Mol Sci 2021; 22:ijms22073366. [PMID: 33806083 PMCID: PMC8036306 DOI: 10.3390/ijms22073366] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/22/2021] [Accepted: 03/23/2021] [Indexed: 12/15/2022] Open
Abstract
The integrin αIIbβ3 is the most abundant integrin on platelets. Upon platelet activation, the integrin changes its conformation (inside-out signalling) and outside-in signalling takes place leading to platelet spreading, platelet aggregation and thrombus formation. Bloodsucking parasites such as mosquitoes, leeches and ticks express anticoagulant and antiplatelet proteins, which represent major sources of lead compounds for the development of useful therapeutic agents for the treatment of haemostatic disorders or cardiovascular diseases. In addition to hematophagous parasites, snakes also possess anticoagulant and antiplatelet proteins in their salivary glands. Two snake venom proteins have been developed into two antiplatelet drugs that are currently used in the clinic. The group of proteins discussed in this review are disintegrins, low molecular weight integrin-binding cysteine-rich proteins, found in snakes, ticks, leeches, worms and horseflies. Finally, we highlight various oral antagonists, which have been tested in clinical trials but were discontinued due to an increase in mortality. No new αIIbβ3 inhibitors are developed since the approval of current platelet antagonists, and structure-function analysis of exogenous disintegrins could help find platelet antagonists with fewer adverse side effects.
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29
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Siegel PM, Bojti I, Bassler N, Holien J, Flierl U, Wang X, Waggershauser P, Tonnar X, Vedecnik C, Lamprecht C, Stankova I, Li T, Helbing T, Wolf D, Anto-Michel N, Mitre LS, Ehrlich J, Orlean L, Bender I, Przewosnik A, Mauler M, Hollederer L, Moser M, Bode C, Parker MW, Peter K, Diehl P. A DARPin targeting activated Mac-1 is a novel diagnostic tool and potential anti-inflammatory agent in myocarditis, sepsis and myocardial infarction. Basic Res Cardiol 2021; 116:17. [PMID: 33721106 PMCID: PMC7960600 DOI: 10.1007/s00395-021-00849-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 01/18/2021] [Indexed: 12/15/2022]
Abstract
The monocyte β2-integrin Mac-1 is crucial for leukocyte–endothelium interaction, rendering it an attractive therapeutic target for acute and chronic inflammation. Using phage display, a Designed-Ankyrin-Repeat-Protein (DARPin) was selected as a novel binding protein targeting and blocking the αM I-domain, an activation-specific epitope of Mac-1. This DARPin, named F7, specifically binds to activated Mac-1 on mouse and human monocytes as determined by flow cytometry. Homology modelling and docking studies defined distinct interaction sites which were verified by mutagenesis. Intravital microscopy showed reduced leukocyte–endothelium adhesion in mice treated with this DARPin. Using mouse models of sepsis, myocarditis and ischaemia/reperfusion injury, we demonstrate therapeutic anti-inflammatory effects. Finally, the activated Mac-1-specific DARPin is established as a tool to detect monocyte activation in patients receiving extra-corporeal membrane oxygenation, as well as suffering from sepsis and ST-elevation myocardial infarction. The activated Mac-1-specific DARPin F7 binds preferentially to activated monocytes, detects inflammation in critically ill patients, and inhibits monocyte and neutrophil function as an efficient new anti-inflammatory agent.
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Affiliation(s)
- Patrick M Siegel
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Australia
| | - István Bojti
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Nicole Bassler
- Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Australia
| | - Jessica Holien
- ACRF Rational Drug Discovery Centre, St. Vincent's Institute of Medical Research, Melbourne, Australia
| | - Ulrike Flierl
- Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Australia
| | - Xiaowei Wang
- Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Australia.,Baker Department of Cardiometabolic Health, University of Melbourne, Melbourne, Australia.,Department of Medicine, Central Clinical School, Monash University, Melbourne, Australia
| | - Philipp Waggershauser
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Xavier Tonnar
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Christopher Vedecnik
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Constanze Lamprecht
- BIOSS Centre for Biological Signalling Studies/Synthetic Biology of Signalling Processes, University of Freiburg, Freiburg, Germany
| | - Ivana Stankova
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Tian Li
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Thomas Helbing
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Dennis Wolf
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Nathaly Anto-Michel
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Lucia Sol Mitre
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Julia Ehrlich
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Lukas Orlean
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Ileana Bender
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Anne Przewosnik
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Maximilian Mauler
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Laura Hollederer
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Martin Moser
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Christoph Bode
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Michael W Parker
- ACRF Rational Drug Discovery Centre, St. Vincent's Institute of Medical Research, Melbourne, Australia.,Baker Department of Cardiometabolic Health, University of Melbourne, Melbourne, Australia.,Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Melbourne, Australia
| | - Karlheinz Peter
- Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Australia. .,Baker Department of Cardiometabolic Health, University of Melbourne, Melbourne, Australia. .,Department of Medicine, Central Clinical School, Monash University, Melbourne, Australia. .,Baker Heart and Diabetes Institute, 75 Commercial Road, Melbourne, VIC, 3004, Australia.
| | - Philipp Diehl
- Cardiology and Angiology I, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Atherothrombosis and Vascular Biology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Australia.,Department of Medicine, Central Clinical School, Monash University, Melbourne, Australia
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30
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Henning Stumpf B, Ambriović-Ristov A, Radenovic A, Smith AS. Recent Advances and Prospects in the Research of Nascent Adhesions. Front Physiol 2020; 11:574371. [PMID: 33343382 PMCID: PMC7746844 DOI: 10.3389/fphys.2020.574371] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Accepted: 11/09/2020] [Indexed: 01/08/2023] Open
Abstract
Nascent adhesions are submicron transient structures promoting the early adhesion of cells to the extracellular matrix. Nascent adhesions typically consist of several tens of integrins, and serve as platforms for the recruitment and activation of proteins to build mature focal adhesions. They are also associated with early stage signaling and the mechanoresponse. Despite their crucial role in sampling the local extracellular matrix, very little is known about the mechanism of their formation. Consequently, there is a strong scientific activity focused on elucidating the physical and biochemical foundation of their development and function. Precisely the results of this effort will be summarized in this article.
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Affiliation(s)
- Bernd Henning Stumpf
- PULS Group, Institute for Theoretical Physics, Interdisciplinary Center for Nanostructured Films, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Andreja Ambriović-Ristov
- Laboratory for Cell Biology and Signalling, Division of Molecular Biology, Ruđer Bošković Institute, Zagreb, Croatia
| | - Aleksandra Radenovic
- Laboratory of Nanoscale Biology, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Ana-Sunčana Smith
- PULS Group, Institute for Theoretical Physics, Interdisciplinary Center for Nanostructured Films, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
- Group for Computational Life Sciences, Division of Physical Chemistry, Ruđer Bošković Institute, Zagreb, Croatia
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31
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Itagaki K, Sasada M, Miyazaki S, Iyoda T, Imaizumi T, Haga M, Kuga A, Inomata H, Kondo Y, Osada S, Kodama H, Higami Y, Fukai F. Exposure of the cryptic de-adhesive site FNIII14 in fibronectin molecule and its binding to membrane-type eEF1A induce migration and invasion of cancer cells via β1-integrin inactivation. Am J Cancer Res 2020; 10:3990-4004. [PMID: 33294281 PMCID: PMC7716165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Accepted: 10/13/2020] [Indexed: 06/12/2023] Open
Abstract
Cell migration is a highly coordinated process that involves not only integrin-mediated adhesion but also de-adhesion. We previously found that a cryptic de-adhesive site within fibronectin molecule, termed FNIII14, weakens cell adhesion to the extracellular matrix by inactivating β1-integrins. Surprisingly, eukaryotic translation elongation factor-1A (eEF1A), an essential factor during protein biosynthesis, was identified as a membrane receptor that mediates the de-adhesive effect of FNIII14. Here, we demonstrate that FNIII14-mediated de-adhesion causes enhanced migration and invasion in two types of highly invasive/metastatic cancer cells, resulting in the initiation of metastasis. Both in vitro migration and invasion of highly invasive human melanoma cell line, Mum2B, were inhibited by a matrix metalloproteinase (MMP)-2/9 inhibitor or a function-blocking antibody against FNIII14 (anti-FNIII14 Ab), suggesting that MMP-mediated exposure of the cryptic de-adhesive site FNIII14 was responsible for Mum2B cell migration and invasion. The MMP-induced FNIII14 exposure was also shown to be functional in the migration and invasion of highly metastatic mouse breast cancer cell line 4T1. Overexpression and knockdown experiments of eEF1A in Mum2B cells revealed that the migration and invasion were dependent on the membrane levels of eEF1A. In vivo experiments using tumor xenograft mouse models derived from Mum2B and 4T1 cell lines showed that the anti-FNIII14 Ab has a significant anti-metastatic effect. Thus, these results provide novel insights into the regulation of cancer cell migration and invasion and suggest promising targets for anti-metastasis strategies.
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Affiliation(s)
- Keisuke Itagaki
- Department of Molecular Pathophysiology, Faculty of Pharmaceutical Sciences, Tokyo University of Science2641 Yamazaki, Noda-Shi, Chiba 278-8510, Japan
| | - Manabu Sasada
- Department of Molecular Pathophysiology, Faculty of Pharmaceutical Sciences, Tokyo University of Science2641 Yamazaki, Noda-Shi, Chiba 278-8510, Japan
| | - Satoru Miyazaki
- Department of Medical and Life Science, Faculty of Pharmaceutical Sciences, Tokyo University of Science2641 Yamazaki, Noda-Shi, Chiba 278-8510, Japan
| | - Takuya Iyoda
- Department of Molecular Pathophysiology, Faculty of Pharmaceutical Sciences, Tokyo University of Science2641 Yamazaki, Noda-Shi, Chiba 278-8510, Japan
| | - Takahiro Imaizumi
- Department of Molecular Pathophysiology, Faculty of Pharmaceutical Sciences, Tokyo University of Science2641 Yamazaki, Noda-Shi, Chiba 278-8510, Japan
| | - Makoto Haga
- Department of Molecular Pathophysiology, Faculty of Pharmaceutical Sciences, Tokyo University of Science2641 Yamazaki, Noda-Shi, Chiba 278-8510, Japan
| | - Akira Kuga
- Department of Molecular Pathophysiology, Faculty of Pharmaceutical Sciences, Tokyo University of Science2641 Yamazaki, Noda-Shi, Chiba 278-8510, Japan
| | - Hiroki Inomata
- Department of Molecular Pathophysiology, Faculty of Pharmaceutical Sciences, Tokyo University of Science2641 Yamazaki, Noda-Shi, Chiba 278-8510, Japan
| | - Yosuke Kondo
- Department of Medical and Life Science, Faculty of Pharmaceutical Sciences, Tokyo University of Science2641 Yamazaki, Noda-Shi, Chiba 278-8510, Japan
| | - Satoshi Osada
- Department of Biochemistry, Faculty of Science and Engineering, Saga University1 Honjo-machi, Saga 840-8502, Japan
| | - Hiroaki Kodama
- Department of Biochemistry, Faculty of Science and Engineering, Saga University1 Honjo-machi, Saga 840-8502, Japan
| | - Yoshikazu Higami
- Department of Molecular Pathology and Metabolic Disease, Faculty of Pharmaceutical Sciences, Tokyo University of Science2641 Yamazaki, Noda-Shi, Chiba 278-8510, Japan
| | - Fumio Fukai
- Department of Molecular Pathophysiology, Faculty of Pharmaceutical Sciences, Tokyo University of Science2641 Yamazaki, Noda-Shi, Chiba 278-8510, Japan
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32
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Martens U, Janke U, Möller S, Talbot D, Abou-Hassan A, Delcea M. Interaction of fibrinogen-magnetic nanoparticle bioconjugates with integrin reconstituted into artificial membranes. NANOSCALE 2020; 12:19918-19930. [PMID: 32986054 DOI: 10.1039/d0nr04181e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Magnetic nanoparticles have a broad spectrum of biomedical applications including cell separation, diagnostics and therapy. One key issue is little explored: how do the engineered nanoparticles interact with blood components after injection? The formation of bioconjugates in the bloodstream and subsequent reactions are potentially toxic due to the ability to induce an immune response. The understanding of the underlying processes is of major relevance to design not only efficient, but also safe nanoparticles for e.g. targeted drug delivery applications. In this study, we report on maghemite nanoparticles functionalized with citrate-, dextran- and polyethylene glycol coatings and their interaction with the clotting protein fibrinogen. Further, we investigate using biophysical tools (e.g. dynamic light scattering, circular dichroism spectroscopy and quartz crystal microbalance) the interaction of the magnetic nanoparticles-fibrinogen bioconjugates with artificial cell membranes as a model system for blood platelets. We found that fibrinogen corona formation provides colloidal stability to maghemite nanoparticles. In addition, bioconjugates of fibrinogen with dextran- and citrate-coated NPs interact with integrin-containing lipid bilayer, especially upon treatment with divalent ions, whereas PEG-coating reveals minor interaction. Our study at the interface of protein-conjugated nanoparticles and artificial cell membranes is essential for engineering safe nanoparticles for drug delivery applications.
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Affiliation(s)
- Ulrike Martens
- Institute of Biochemistry, University of Greifswald, 17489 Greifswald, Germany.
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Fujita M, Sasada M, Iyoda T, Fukai F. Involvement of Integrin-Activating Peptides Derived from Tenascin-C in Cancer Aggression and New Anticancer Strategy Using the Fibronectin-Derived Integrin-Inactivating Peptide. Molecules 2020; 25:E3239. [PMID: 32708610 PMCID: PMC7396993 DOI: 10.3390/molecules25143239] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 07/11/2020] [Accepted: 07/13/2020] [Indexed: 02/07/2023] Open
Abstract
Matricellular proteins, which exist in association with the extracellular matrix (ECM) and ECM protein molecules, harbor functional sites within their molecular structures. These functional sites are released through proteolytic cleavage by inflammatory proteinases, such as matrix metalloproteinases (MMPs) and a disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS), and the peptides containing these functional sites have unique biological activities that are often not detected in the parent molecules. We previously showed that tenascin-C (TNC) and plasma fibronectin (pFN), examples of matricellular proteins, have cryptic bioactive sites that have opposite effects on cell adhesion to the ECM. A peptide containing the bioactive site of TNC, termed TNIIIA2, which is highly released at sites of inflammation and in the tumor microenvironment (TME), has the ability to potently and persistently activate β1-integrins. In the opposite manner, the peptide FNIII14 containing the bioactive site of pFN has the ability to inactivate β1-integrins. This review highlights that peptide TNIIIA2 can act as a procancer factor and peptide FNIII14 can act as an anticancer agent, based on the regulation on β1-integrin activation. Notably, the detrimental effects of TNIIIA2 can be inhibited by FNIII14. These findings open the possibility for new therapeutic strategies based on the inactivation of β1-integrin by FNIII14.
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Affiliation(s)
- Motomichi Fujita
- Department of Molecular Patho-Physiology, Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan; (M.F.); (M.S.)
| | - Manabu Sasada
- Department of Molecular Patho-Physiology, Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan; (M.F.); (M.S.)
- Clinical Research Center in Hiroshima, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-Ku, Hiroshima 734-8551, Japan
| | - Takuya Iyoda
- Department of Pharmacy, Faculty of Pharmaceutical Sciences, Sanyo-Onoda City University, 1-1-1 Daigaku-Doori, Sanyo-Onoda, Yamaguchi 756-0884, Japan
| | - Fumio Fukai
- Department of Molecular Patho-Physiology, Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan; (M.F.); (M.S.)
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34
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Chen Y, Ju LA. Biomechanical thrombosis: the dark side of force and dawn of mechano-medicine. Stroke Vasc Neurol 2020; 5:185-197. [PMID: 32606086 PMCID: PMC7337368 DOI: 10.1136/svn-2019-000302] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 11/14/2019] [Indexed: 12/19/2022] Open
Abstract
Arterial thrombosis is in part contributed by excessive platelet aggregation, which can lead to blood clotting and subsequent heart attack and stroke. Platelets are sensitive to the haemodynamic environment. Rapid haemodynamcis and disturbed blood flow, which occur in vessels with growing thrombi and atherosclerotic plaques or is caused by medical device implantation and intervention, promotes platelet aggregation and thrombus formation. In such situations, conventional antiplatelet drugs often have suboptimal efficacy and a serious side effect of excessive bleeding. Investigating the mechanisms of platelet biomechanical activation provides insights distinct from the classic views of agonist-stimulated platelet thrombus formation. In this work, we review the recent discoveries underlying haemodynamic force-reinforced platelet binding and mechanosensing primarily mediated by three platelet receptors: glycoprotein Ib (GPIb), glycoprotein IIb/IIIa (GPIIb/IIIa) and glycoprotein VI (GPVI), and their implications for development of antithrombotic 'mechano-medicine' .
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Affiliation(s)
- Yunfeng Chen
- Molecular Medicine, Scripps Research Institute, La Jolla, California, USA
| | - Lining Arnold Ju
- School of Biomedical Engineering, Heart Research Institute and Charles Perkins Centre, The University of Sydney, Camperdown, New South Wales, Australia
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35
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Haydari Z, Shams H, Jahed Z, Mofrad MRK. Kindlin Assists Talin to Promote Integrin Activation. Biophys J 2020; 118:1977-1991. [PMID: 32191864 DOI: 10.1016/j.bpj.2020.02.023] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 01/14/2020] [Accepted: 02/03/2020] [Indexed: 12/31/2022] Open
Abstract
Integrin αIIbβ3 is a predominant type of integrin abundantly expressed on the surface of platelets and its activation regulates the process of thrombosis. Talin and kindlin are cytoplasmic proteins that bind to integrin and modulate its affinity for extracellular ligands. Although the molecular details of talin-mediated integrin activation are known, the mechanism of kindlin involvement in this process remains elusive. Here, we demonstrate that the interplay between talin and kindlin promotes integrin activation. Our all-atomic molecular dynamics simulations on complete transmembrane and cytoplasmic domains of integrin αIIbβ3, talin1 F2/F3 subdomains, and the kindlin2 FERM domain in an explicit lipid-water environment over a microsecond timescale unraveled the role of kindlin as an enhancer of the talin interaction with the membrane proximal region of β-integrin. The cooperation of kindlin with talin results in a complete disruption of salt bridges between R995 on αIIb and D723/E726 on β3. Furthermore, kindlin modifies the molecular mechanisms of inside-out activation by decreasing the crossing angle between transmembrane helices of integrin αIIbβ3, which eventually results in parallelization of integrin dimer. In addition, our control simulation featuring integrin in complex with kindlin reveals that kindlin binding is not sufficient for unclasping the inner-membrane and outer-membrane interactions of integrin dimer, thus ruling out the possibility of solitary action of kindlin in integrin activation.
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Affiliation(s)
- Zainab Haydari
- Molecular Cell Biomechanics Laboratory, Departments of Bioengineering and Mechanical Engineering, University of California, Berkeley, California
| | - Hengameh Shams
- Molecular Cell Biomechanics Laboratory, Departments of Bioengineering and Mechanical Engineering, University of California, Berkeley, California
| | - Zeinab Jahed
- Molecular Cell Biomechanics Laboratory, Departments of Bioengineering and Mechanical Engineering, University of California, Berkeley, California
| | - Mohammad R K Mofrad
- Molecular Cell Biomechanics Laboratory, Departments of Bioengineering and Mechanical Engineering, University of California, Berkeley, California; Molecular Biophysics and Integrative Bioimaging Division, Lawrence Berkeley National Lab, Berkeley, California.
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36
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Baltes F, Pfeifer V, Silbermann K, Caspers J, Wantoch von Rekowski K, Schlesinger M, Bendas G. β 1-Integrin binding to collagen type 1 transmits breast cancer cells into chemoresistance by activating ABC efflux transporters. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2020; 1867:118663. [PMID: 31987794 DOI: 10.1016/j.bbamcr.2020.118663] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 01/20/2020] [Accepted: 01/23/2020] [Indexed: 12/13/2022]
Abstract
Molecular interactions of tumor cells with the microenvironment are regarded as onset of chemotherapy resistance, referred to as cell adhesion mediated drug resistance (CAM-DR). Here we elucidate a mechanism of CAM-DR in breast cancer cells in vitro. We show that human MCF-7 and MDA-MB-231 breast cancer cells decrease their sensitivity towards cisplatin, doxorubicin, and mitoxantrone cytotoxicity upon binding to collagen type 1 (COL1) or fibronectin (FN). The intracellular concentrations of doxorubicin and mitoxantrone were decreased upon cell cultivation on COL1, while cellular cisplatin levels remained unaffected. Since doxorubicin and mitoxantrone are transporter substrates, this refers to ATP binding cassette (ABC) efflux transporter activities. The activation of the transporters BCRP, P-gp and MRP1 was shown by fluorescence assays to distinguish the individual input of these transporters to resistance in presence of COL1 and related to their expression levels by western blot. An ABC transporter inhibitor was able to re-sensitize COL1-treated cells for doxorubicin and mitoxantrone toxicity. Antibody-blocking of β1-integrin (ITGB1) induced sensitization towards the indicated cytostatic drugs by attenuating the increased ABC efflux activity. This refers to a key role of ITGB1 for matrix binding and subsequent transporter activation. A downregulation of α2β1 integrin following COL1 binding appears as clear indication for the relationship between ITGB1 and ABC transporters in regulating resistance formation, while knockdown of ITGB1 leads to a significant upregulation of all three transporters. Our data provide evidence for a role of CAM-DR in breast cancer via an ITGB1 - transporter axis and offer promising therapeutic targets for cancer sensitization.
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Affiliation(s)
| | | | | | | | | | | | - Gerd Bendas
- Department of Pharmacy, University of Bonn, Germany.
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37
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Bye AP, Gibbins JM, Mahaut-Smith MP. Ca 2+ waves coordinate purinergic receptor-evoked integrin activation and polarization. Sci Signal 2020; 13:13/615/eaav7354. [PMID: 31964805 DOI: 10.1126/scisignal.aav7354] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Cells sense extracellular nucleotides through the P2Y class of purinergic G protein-coupled receptors (GPCRs), which stimulate integrin activation through signaling events, including intracellular Ca2+ mobilization. We investigated the relationship between P2Y-stimulated repetitive Ca2+ waves and fibrinogen binding to the platelet integrin αIIbβ3 (GPIIb/IIIa) through confocal fluorescence imaging of primary rat megakaryocytes. Costimulation of the receptors P2Y1 and P2Y12 generated a series of Ca2+ transients that each induced a rapid, discrete increase in fibrinogen binding. The peak and net increase of individual fibrinogen binding events correlated with the Ca2+ transient amplitude and frequency, respectively. Using BAPTA loading and selective receptor antagonists, we found that Ca2+ mobilization downstream of P2Y1 was essential for ADP-evoked fibrinogen binding, whereas P2Y12 and the kinase PI3K were also required for αIIbβ3 activation and enhanced the number of Ca2+ transients. ADP-evoked fibrinogen binding was initially uniform over the cell periphery but subsequently redistributed with a polarity that correlated with the direction of the Ca2+ waves. Polarization of αIIbβ3 may be mediated by the actin cytoskeleton, because surface-bound fibrinogen is highly immobile, and its motility was enhanced by cytoskeletal disruption. In conclusion, spatial and temporal patterns of Ca2+ increase enable fine control of αIIbβ3 activation after cellular stimulation. P2Y1-stimulated Ca2+ transients coupled to αIIbβ3 activation only in the context of P2Y12 coactivation, thereby providing an additional temporal mechanism of synergy between these Gq- and Gi-coupled GPCRs.
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Affiliation(s)
- Alexander P Bye
- Institute for Cardiovascular and Metabolic Research, University of Reading, Reading RG6 6AS, UK.
| | - Jonathan M Gibbins
- Institute for Cardiovascular and Metabolic Research, University of Reading, Reading RG6 6AS, UK
| | - Martyn P Mahaut-Smith
- Department of Molecular and Cell Biology, University of Leicester, Leicester LE1 7RH, UK.
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Lim IR, Kim C, Jung JW, Kim JH, Hong SJ. Inhibition of Smooth Muscle Cell Proliferation and Migration by a Talin Modulator Attenuates Neointimal Formation after Femoral Arterial Injury. Korean Circ J 2020; 50:613-624. [PMID: 32588569 PMCID: PMC7321761 DOI: 10.4070/kcj.2019.0421] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 02/19/2020] [Accepted: 03/17/2020] [Indexed: 11/11/2022] Open
Abstract
Background and Objectives Vascular smooth muscle cell (SMC) proliferation and migration play a critical role in neointimal formation. Focal adhesion is involved in cell proliferation and migration, and talin is known to be a key regulator of these processes. We synthesized a new talin modulator that binds to the talin protein, and investigated its effects on SMCs and neointimal formation after vascular injury. Methods Human aortic SMCs (HAoSMCs) were treated with a newly synthesized talin modulator. Apolipoprotein E knockout (ApoE KO) mice were subjected to left femoral arterial injury and orally administered with the talin modulator daily. Laser Doppler imager was used to compare the blood flow, and injured femoral arteries and blood serum were analyzed after 28 days. Results The talin modulator significantly inhibited cell proliferation in a concentration-dependent manner and suppressed the migration of HAoSMCs. Treatment with a talin modulator resulted in a significant reduction in the phosphorylation of focal adhesion molecules and downstream signaling molecules related to cell proliferation and migration. The effects of the talin modulator in HAoSMCs were found to be reversible, as evidenced by the reactivation of signaling pathways upon its removal. After 28 days of administration of the talin modulator, an improvement in the blood flow and reduction in neointimal formation in the injured femoral arteries were observed. Conclusions We demonstrated the inhibitory effects of a talin modulator on SMC proliferation and migration, and that were associated with downregulation of signaling pathways, resulting in the attenuation of neointimal formation in ApoE KO mice.
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Affiliation(s)
- I Rang Lim
- Department of Cardiology, Cardiovascular Center, Korea University College of Medicine, Seoul, Korea
| | - Chungho Kim
- Department of Life Sciences, Korea University College of Life Sciences and Biotechnology, Seoul, Korea
| | - Jong Wha Jung
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Kyungpook National University, Daegu, Korea
| | - Jong Ho Kim
- Department of Cardiology, Cardiovascular Center, Korea University College of Medicine, Seoul, Korea.
| | - Soon Jun Hong
- Department of Cardiology, Cardiovascular Center, Korea University College of Medicine, Seoul, Korea
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Khan RB, Goult BT. Adhesions Assemble!-Autoinhibition as a Major Regulatory Mechanism of Integrin-Mediated Adhesion. Front Mol Biosci 2019; 6:144. [PMID: 31921890 PMCID: PMC6927945 DOI: 10.3389/fmolb.2019.00144] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 11/26/2019] [Indexed: 01/14/2023] Open
Abstract
The advent of cell-cell and cell-extracellular adhesion enabled cells to interact in a coherent manner, forming larger structures and giving rise to the development of tissues, organs and complex multicellular life forms. The development of such organisms required tight regulation of dynamic adhesive structures by signaling pathways that coordinate cell attachment. Integrin-mediated adhesion to the extracellular matrix provides cells with support, survival signals and context-dependent cues that enable cells to run different cellular programs. One mysterious aspect of the process is how hundreds of proteins assemble seemingly spontaneously onto the activated integrin. An emerging concept is that adhesion assembly is regulated by autoinhibition of key proteins, a highly dynamic event that is modulated by a variety of signaling events. By enabling precise control of the activation state of proteins, autoinhibition enables localization of inactive proteins and the formation of pre-complexes. In response to the correct signals, these proteins become active and interact with other proteins, ultimately leading to development of cell-matrix junctions. Autoinhibition of key components of such adhesion complexes—including core components integrin, talin, vinculin, and FAK and important peripheral regulators such as RIAM, Src, and DLC1—leads to a view that the majority of proteins involved in complex assembly might be regulated by intramolecular interactions. Autoinhibition is relieved via multiple different signals including post-translation modification and proteolysis. More recently, mechanical forces have been shown to stabilize and increase the lifetimes of active conformations, identifying autoinhibition as a means of encoding mechanosensitivity. The complexity and scope for nuanced adhesion dynamics facilitated via autoinhibition provides numerous points of regulation. In this review, we discuss what is known about this mode of regulation and how it leads to rapid and tightly controlled assembly and disassembly of cell-matrix adhesion.
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Affiliation(s)
- Rejina B Khan
- School of Biosciences, University of Kent, Canterbury, United Kingdom
| | - Benjamin T Goult
- School of Biosciences, University of Kent, Canterbury, United Kingdom
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40
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Hwang D, Tsuji K, Park H, Burke TR, Rader C. Site-Specific Lysine Arylation as an Alternative Bioconjugation Strategy for Chemically Programmed Antibodies and Antibody-Drug Conjugates. Bioconjug Chem 2019; 30:2889-2896. [PMID: 31675216 DOI: 10.1021/acs.bioconjchem.9b00609] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
By exploiting a uniquely reactive lysine residue (Lys99) for site-specific attachment of small molecules, the humanized catalytic antibody h38C2 has been used as bioconjugation module in the assembly of chemically programmed antibodies and antibody-drug conjugates. Treatment of h38C2 with β-lactam-functionalized small molecules has been previously shown to result in covalent conjugation by selective formation of a stable amide bond with the ε-amino group of the Lys99 residue. Here we report that heteroaryl methylsulfonyl (MS-PODA)-functionalized small molecules represent an alternative bioconjugation strategy through highly efficient, site-specific, and stable arylation of the Lys99 residue. A set of chemically programmed antibodies and antibody-drug conjugates assembled by Lys99 arylation provided proof-of-concept for the therapeutic utility of this alternative bioconjugation strategy. While being equally effective as β-lactam-functionalized ligands for bioconjugation with catalytic antibody h38C2, the MS-PODA moiety offers distinct synthetic advantages, making it highly attractive.
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Affiliation(s)
| | - Kohei Tsuji
- Chemical Biology Laboratory, Center for Cancer Research , National Cancer Institute, National Institutes of Health , Frederick , Maryland 21702 , United States
| | | | - Terrence R Burke
- Chemical Biology Laboratory, Center for Cancer Research , National Cancer Institute, National Institutes of Health , Frederick , Maryland 21702 , United States
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41
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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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42
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Song EK, Jeon J, Jang DG, Kim HE, Sim HJ, Kwon KY, Medina-Ruiz S, Jang HJ, Lee AR, Rho JG, Lee HS, Kim SJ, Park CY, Myung K, Kim W, Kwon T, Yang S, Park TJ. ITGBL1 modulates integrin activity to promote cartilage formation and protect against arthritis. Sci Transl Med 2019; 10:10/462/eaam7486. [PMID: 30305454 DOI: 10.1126/scitranslmed.aam7486] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 09/20/2018] [Indexed: 11/02/2022]
Abstract
Developing and mature chondrocytes constantly interact with and remodel the surrounding extracellular matrix (ECM). Recent research indicates that integrin-ECM interaction is differentially regulated during cartilage formation (chondrogenesis). Integrin signaling is also a key source of the catabolic reactions responsible for joint destruction in both rheumatoid arthritis and osteoarthritis. However, we do not understand how chondrocytes dynamically regulate integrin signaling in such an ECM-rich environment. Here, we found that developing chondrocytes express integrin-β-like 1 (Itgbl1) at specific stages, inhibiting integrin signaling and promoting chondrogenesis. Unlike cytosolic integrin inhibitors, ITGBL1 is secreted and physically interacts with integrins to down-regulate activity. We observed that Itgbl1 expression was strongly reduced in the damaged articular cartilage of patients with osteoarthritis (OA). Ectopic expression of Itgbl1 protected joint cartilage against OA development in the destabilization of the medial meniscus-induced OA mouse model. Our results reveal ITGBL1 signaling as an underlying mechanism of protection against destructive cartilage disorders and suggest the potential therapeutic utility of targeting ITGBL1 to modulate integrin signaling in human disease.
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Affiliation(s)
- Eun Kyung Song
- School of Life Sciences, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea.,Center for Genomic Integrity, Institute for Basic Science, Ulsan 44919, Republic of Korea
| | - Jimin Jeon
- Department of Pharmacology, Ajou University School of Medicine, Suwon 16499, Republic of Korea.,Department of Biomedical Sciences, Graduate School, Ajou University, Suwon 16499, Republic of Korea.,CIRNO, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Dong Gil Jang
- School of Life Sciences, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Ha Eun Kim
- School of Life Sciences, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Hyo Jung Sim
- School of Life Sciences, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Keun Yeong Kwon
- School of Life Sciences, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Sofia Medina-Ruiz
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
| | - Hyun-Jun Jang
- School of Life Sciences, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Ah Reum Lee
- School of Life Sciences, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Jun Gi Rho
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Republic of Korea
| | - Hyun-Shik Lee
- KNU-Center for Nonlinear Dynamics, CMRI, School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Seok Jung Kim
- Department of Orthopaedic Surgery, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Chan Young Park
- School of Life Sciences, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Kyungjae Myung
- Center for Genomic Integrity, Institute for Basic Science, Ulsan 44919, Republic of Korea
| | - Wook Kim
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Republic of Korea
| | - Taejoon Kwon
- School of Life Sciences, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Siyoung Yang
- Department of Pharmacology, Ajou University School of Medicine, Suwon 16499, Republic of Korea. .,Department of Biomedical Sciences, Graduate School, Ajou University, Suwon 16499, Republic of Korea.,CIRNO, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Tae Joo Park
- School of Life Sciences, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea. .,Center for Genomic Integrity, Institute for Basic Science, Ulsan 44919, Republic of Korea
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Chen Y, Ju LA, Zhou F, Liao J, Xue L, Su QP, Jin D, Yuan Y, Lu H, Jackson SP, Zhu C. An integrin α IIbβ 3 intermediate affinity state mediates biomechanical platelet aggregation. NATURE MATERIALS 2019; 18:760-769. [PMID: 30911119 PMCID: PMC6586518 DOI: 10.1038/s41563-019-0323-6] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Accepted: 02/19/2019] [Indexed: 05/20/2023]
Abstract
Integrins are membrane receptors that mediate cell adhesion and mechanosensing. The structure-function relationship of integrins remains incompletely understood, despite the extensive studies carried out because of its importance to basic cell biology and translational medicine. Using a fluorescence dual biomembrane force probe, microfluidics and cone-and-plate rheometry, we applied precisely controlled mechanical stimulations to platelets and identified an intermediate state of integrin αIIbβ3 that is characterized by an ectodomain conformation, ligand affinity and bond lifetimes that are all intermediate between the well-known inactive and active states. This intermediate state is induced by ligand engagement of glycoprotein (GP) Ibα via a mechanosignalling pathway and potentiates the outside-in mechanosignalling of αIIbβ3 for further transition to the active state during integrin mechanical affinity maturation. Our work reveals distinct αIIbβ3 state transitions in response to biomechanical and biochemical stimuli, and identifies a role for the αIIbβ3 intermediate state in promoting biomechanical platelet aggregation.
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Affiliation(s)
- Yunfeng Chen
- Woodruff School of Mechanical Engineering and Georgia Institute of Technology, Atlanta, GA, USA
- Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA, USA
- Department of Molecular Medicine, MERU-Roon Research Center on Vascular Biology, The Scripps Research Institute, La Jolla, CA, USA
| | - Lining Arnold Ju
- Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA, USA
- Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
- Heart Research Institute, The University of Sydney, Camperdown, New South Wales, Australia
- Charles Perkins Centre, The University of Sydney, Camperdown, New South Wales, Australia
- School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Camperdown, New South Wales, Australia
| | - Fangyuan Zhou
- Woodruff School of Mechanical Engineering and Georgia Institute of Technology, Atlanta, GA, USA
- Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA, USA
| | - Jiexi Liao
- Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA, USA
- Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Lingzhou Xue
- Department of Statistics, Pennsylvania State University, University Park, PA, USA
| | - Qian Peter Su
- Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, New South Wales, Australia
| | - Dayong Jin
- Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, New South Wales, Australia
| | - Yuping Yuan
- Heart Research Institute, The University of Sydney, Camperdown, New South Wales, Australia
- Charles Perkins Centre, The University of Sydney, Camperdown, New South Wales, Australia
| | - Hang Lu
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Shaun P Jackson
- Department of Molecular Medicine, MERU-Roon Research Center on Vascular Biology, The Scripps Research Institute, La Jolla, CA, USA.
- Heart Research Institute, The University of Sydney, Camperdown, New South Wales, Australia.
- Charles Perkins Centre, The University of Sydney, Camperdown, New South Wales, Australia.
| | - Cheng Zhu
- Woodruff School of Mechanical Engineering and Georgia Institute of Technology, Atlanta, GA, USA.
- Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA, USA.
- Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA.
- Heart Research Institute, The University of Sydney, Camperdown, New South Wales, Australia.
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Janke U, Kulke M, Buchholz I, Geist N, Langel W, Delcea M. Drug-induced activation of integrin alpha IIb beta 3 leads to minor localized structural changes. PLoS One 2019; 14:e0214969. [PMID: 30978226 PMCID: PMC6461286 DOI: 10.1371/journal.pone.0214969] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 03/22/2019] [Indexed: 12/20/2022] Open
Abstract
Integrins are transmembrane proteins involved in hemostasis, wound healing, immunity and cancer. In response to intracellular signals and ligand binding, integrins adopt different conformations: the bent (resting) form; the intermediate extended form; and the ligand-occupied active form. An integrin undergoing such conformational dynamics is the heterodimeric platelet receptor αIIbβ3. Although the dramatic rearrangement of the overall structure of αIIbβ3 during the activation process is potentially related to changes in the protein secondary structure, this has not been investigated so far in a membrane environment. Here we examine the Mn2+- and drug-induced activation of αIIbβ3 and the impact on the structure of this protein reconstituted into liposomes. By quartz crystal microbalance with dissipation monitoring and activation assays we show that Mn2+ induces binding of the conformation-specific antibody PAC-1, which only recognizes the extended, active integrin. Circular dichroism spectroscopy reveals, however, that Mn2+-treatment does not induce major secondary structural changes of αIIbβ3. Similarly, we found that treatment with clinically relevant drugs (e.g. quinine) led to the activation of αIIbβ3 without significant changes in protein secondary structure. Molecular dynamics simulation studies revealed minor local changes in the beta-sheet probability of several extracellular domains of the integrin. Our experimental setup represents a new approach to study transmembrane proteins, especially integrins, in a membrane environment and opens a new way for testing drug binding to integrins under clinically relevant conditions.
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Affiliation(s)
- Una Janke
- Institute of Biochemistry, University of Greifswald, Felix-Hausdorff-Straße 4, Greifswald, Germany
- ZIK HIKE- Zentrum für Innovationskompetenz "Humorale Immunreaktionen bei kardiovaskulären Erkrankungen“, University of Greifswald, Fleischmannstraße 42,Greifswald, Germany
| | - Martin Kulke
- Institute of Biochemistry, University of Greifswald, Felix-Hausdorff-Straße 4, Greifswald, Germany
| | - Ina Buchholz
- Institute of Biochemistry, University of Greifswald, Felix-Hausdorff-Straße 4, Greifswald, Germany
- ZIK HIKE- Zentrum für Innovationskompetenz "Humorale Immunreaktionen bei kardiovaskulären Erkrankungen“, University of Greifswald, Fleischmannstraße 42,Greifswald, Germany
| | - Norman Geist
- Institute of Biochemistry, University of Greifswald, Felix-Hausdorff-Straße 4, Greifswald, Germany
| | - Walter Langel
- Institute of Biochemistry, University of Greifswald, Felix-Hausdorff-Straße 4, Greifswald, Germany
| | - Mihaela Delcea
- Institute of Biochemistry, University of Greifswald, Felix-Hausdorff-Straße 4, Greifswald, Germany
- ZIK HIKE- Zentrum für Innovationskompetenz "Humorale Immunreaktionen bei kardiovaskulären Erkrankungen“, University of Greifswald, Fleischmannstraße 42,Greifswald, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Greifswald, Germany
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Ngwenyama N, Salvador AM, Velázquez F, Nevers T, Levy A, Aronovitz M, Luster AD, Huggins GS, Alcaide P. CXCR3 regulates CD4+ T cell cardiotropism in pressure overload-induced cardiac dysfunction. JCI Insight 2019; 4:125527. [PMID: 30779709 DOI: 10.1172/jci.insight.125527] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 02/14/2019] [Indexed: 12/13/2022] Open
Abstract
Heart failure (HF) is associated in humans and mice with increased circulating levels of CXCL9 and CXCL10, chemokine ligands of the CXCR3 receptor, predominantly expressed on CD4+ Th1 cells. Chemokine engagement of receptors is required for T cell integrin activation and recruitment to sites of inflammation. Th1 cells drive adverse cardiac remodeling in pressure overload-induced cardiac dysfunction, and mice lacking the integrin ligand ICAM-1 show defective T cell recruitment to the heart. Here, we show that CXCR3+ T cells infiltrate the heart in humans and mice with pressure overload-induced cardiac dysfunction. Genetic deletion of CXCR3 disrupts CD4+ T cell heart infiltration and prevents adverse cardiac remodeling. We demonstrate that cardiac fibroblasts and cardiac myeloid cells that include resident and infiltrated macrophages are the source of CXCL9 and CXCL10, which mechanistically promote Th1 cell adhesion to ICAM-1 under shear conditions in a CXCR3-dependent manner. To our knowledge, our findings identify a previously unrecognized role for CXCR3 in Th1 cell recruitment into the heart in pressure overload-induced cardiac dysfunction.
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Affiliation(s)
| | | | | | | | - Alexander Levy
- Molecular Cardiology Research Institute Tufts University, Boston, Massachusetts, USA
| | - Mark Aronovitz
- Molecular Cardiology Research Institute Tufts University, Boston, Massachusetts, USA
| | - Andrew D Luster
- Division of Rheumatology, Allergy and Immunology, Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Gordon S Huggins
- Molecular Cardiology Research Institute Tufts University, Boston, Massachusetts, USA
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Bidone TC, Polley A, Jin J, Driscoll T, Iwamoto DV, Calderwood DA, Schwartz MA, Voth GA. Coarse-Grained Simulation of Full-Length Integrin Activation. Biophys J 2019; 116:1000-1010. [PMID: 30851876 DOI: 10.1016/j.bpj.2019.02.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 12/25/2018] [Accepted: 02/13/2019] [Indexed: 01/01/2023] Open
Abstract
Integrin conformational dynamics are critical to their receptor and signaling functions in many cellular processes, including spreading, adhesion, and migration. However, assessing integrin conformations is both experimentally and computationally challenging because of limitations in resolution and dynamic sampling. Thus, structural changes that underlie transitions between conformations are largely unknown. Here, focusing on integrin αvβ3, we developed a modified form of the coarse-grained heterogeneous elastic network model (hENM), which allows sampling conformations at the onset of activation by formally separating local fluctuations from global motions. Both local fluctuations and global motions are extracted from all-atom molecular dynamics simulations of the full-length αvβ3 bent integrin conformer, but whereas the former are incorporated in the hENM as effective harmonic interactions between groups of residues, the latter emerge by systematically identifying and treating weak interactions between long-distance domains with flexible and anharmonic connections. The new hENM model allows integrins and single-point mutant integrins to explore various conformational states, including the initiation of separation between α- and β-subunit cytoplasmic regions, headpiece extension, and legs opening.
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Affiliation(s)
- Tamara C Bidone
- Department of Chemistry, Institute for Biophysical Dynamics, and James Franck Institute, The University of Chicago, Chicago, Illinois
| | - Anirban Polley
- Department of Chemistry, Institute for Biophysical Dynamics, and James Franck Institute, The University of Chicago, Chicago, Illinois
| | - Jaehyeok Jin
- Department of Chemistry, Institute for Biophysical Dynamics, and James Franck Institute, The University of Chicago, Chicago, Illinois
| | - Tristan Driscoll
- Yale Cardiovascular Research Center and Department of Internal Medicine (Section of Cardiovascular Medicine), Yale School of Medicine, New Haven, Connecticut
| | | | - David A Calderwood
- Department of Pharmacology, New Haven, Connecticut; Department of Cell Biology, Yale University, New Haven, Connecticut
| | - Martin A Schwartz
- Departments of Cell Biology and Biomedical Engineering, Yale University, New Haven, Connecticut; Yale Cardiovascular Research Center and Department of Internal Medicine (Section of Cardiovascular Medicine), Yale School of Medicine, New Haven, Connecticut
| | - Gregory A Voth
- Department of Chemistry, Institute for Biophysical Dynamics, and James Franck Institute, The University of Chicago, Chicago, Illinois.
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Swain S, Roe MM, Sebrell TA, Sidar B, Dankoff J, VanAusdol R, Smythies LE, Smith PD, Bimczok D. CD103 (αE Integrin) Undergoes Endosomal Trafficking in Human Dendritic Cells, but Does Not Mediate Epithelial Adhesion. Front Immunol 2018; 9:2989. [PMID: 30622531 PMCID: PMC6308147 DOI: 10.3389/fimmu.2018.02989] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 12/04/2018] [Indexed: 12/20/2022] Open
Abstract
Dendritic cell (DC) expression of CD103, the α subunit of αEβ7 integrin, is thought to enable DC interactions with E-cadherin-expressing gastrointestinal epithelia for improved mucosal immunosurveillance. In the stomach, efficient DC surveillance of the epithelial barrier is crucial for the induction of immune responses to H. pylori, the causative agent of peptic ulcers and gastric cancer. However, gastric DCs express only low levels of surface CD103, as we previously showed. We here tested the hypothesis that intracellular pools of CD103 in human gastric DCs can be redistributed to the cell surface for engagement of epithelial cell-expressed E-cadherin to promote DC-epithelial cell adhesion. In support of our hypothesis, immunofluorescence analysis of tissue sections showed that CD103+ gastric DCs were preferentially localized within the gastric epithelial layer. Flow cytometry and imaging cytometry revealed that human gastric DCs expressed intracellular CD103, corroborating our previous findings in monocyte-derived DCs (MoDCs). Using confocal microscopy, we show that CD103 was present in endosomal compartments, where CD103 partially co-localized with clathrin, early endosome antigen-1 and Rab11, suggesting that CD103 undergoes endosomal trafficking similar to β1 integrins. Dynamic expression of CD103 on human MoDCs was confirmed by internalization assay. To analyze whether DC-expressed CD103 promotes adhesion to E-cadherin, we performed adhesion and spreading assays on E-cadherin-coated glass slides. In MoDCs generated in the presence of retinoic acid, which express increased CD103, intracellular CD103 significantly redistributed toward the E-cadherin-coated glass surface. However, DCs spreading and adhesion did not differ between E-cadherin-coated slides and slides coated with serum alone. In adhesion assays using E-cadherin-positive HT-29 cells, DC binding was significantly improved by addition of Mn2+ and decreased in the presence of EGTA, consistent with the dependence of integrin-based interactions on divalent cations. However, retinoic acid failed to increase DC adhesion, and a CD103 neutralizing antibody was unable to inhibit DC binding to the E-cadherin positive cells. In contrast, a blocking antibody to DC-expressed E-cadherin significantly reduced DC binding to the epithelium. Overall, these data indicate that CD103 engages in DC-epithelial cell interactions upon contact with epithelial E-cadherin, but is not a major driver of DC adhesion to gastrointestinal epithelia.
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Affiliation(s)
- Steve Swain
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, United States
| | - Mandi M. Roe
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, United States
| | - Thomas A. Sebrell
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, United States
| | - Barkan Sidar
- Chemical and Biological Engineering Department, Montana State University, Bozeman, MT, United States
| | - Jennifer Dankoff
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, United States
| | - Rachel VanAusdol
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, United States
| | - Lesley E. Smythies
- Division of Gastroenterology and Hepatology, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Phillip D. Smith
- Division of Gastroenterology and Hepatology, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Diane Bimczok
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, United States
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Mechanisms of Matrix-Induced Chemoresistance of Breast Cancer Cells-Deciphering Novel Potential Targets for a Cell Sensitization. Cancers (Basel) 2018; 10:cancers10120495. [PMID: 30563275 PMCID: PMC6315379 DOI: 10.3390/cancers10120495] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 11/23/2018] [Accepted: 12/04/2018] [Indexed: 12/12/2022] Open
Abstract
Tumor cell binding to microenvironment components such as collagen type 1 (COL1) attenuates the sensitivity to cytotoxic drugs like cisplatin (CDDP) or mitoxantrone (MX), referred to as cell adhesion mediated drug resistance (CAM-DR). CAM-DR is considered as the onset for resistance mutations, but underlying mechanisms remain elusive. To evaluate CAM-DR as target for sensitization strategies, we analyzed signaling pathways in human estrogen-positive MCF-7 and triple-negative MDA-MB-231 breast cancer cells by western blot, proteome profiler array and TOP-flash assay in presence of COL1. β1-Integrins, known to bind COL1, appear as key for mediating COL1-related resistance in both cell lines that primarily follows FAK/PI3K/AKT pathway in MCF-7, and MAPK pathway in MDA-MB-231 cells. Notably, pCREB is highly elevated in both cell lines. Consequently, blocking these pathways sensitizes the cells evidently to CDDP and MX treatment. Wnt signaling is not relevant in this context. A β1-integrin knockdown of MCF-7 cells (MCF-7-β1-kd) reveals a signaling shift from FAK/PI3K/AKT to MAPK pathway, thus CREB emerges as a promising primary target for sensitization in MDA-MB-231, and secondary target in MCF-7 cells. Concluding, we provide evidence for importance of CAM-DR in breast cancer cells and identify intracellular signaling pathways as targets to sensitize cells for cytotoxicity treatment regimes.
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Singh V, Erady C, Balasubramanian N. Cell-matrix adhesion controls Golgi organization and function through Arf1 activation in anchorage-dependent cells. J Cell Sci 2018; 131:jcs.215855. [PMID: 30054383 PMCID: PMC6127727 DOI: 10.1242/jcs.215855] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 06/27/2018] [Indexed: 12/15/2022] Open
Abstract
Cell-matrix adhesion regulates membrane trafficking controlling anchorage-dependent signaling. While a dynamic Golgi complex can contribute to this pathway, its regulation by adhesion remains unclear. Here we report that loss of adhesion dramatically disorganized the Golgi in mouse and human fibroblast cells. Golgi integrity is restored rapidly upon integrin-mediated re-adhesion to FN and is disrupted by integrin blocking antibody. In suspended cells, the cis, cis-medial and trans-Golgi networks differentially disorganize along the microtubule network but show no overlap with the ER, making this disorganization distinct from known Golgi fragmentation. This pathway is regulated by an adhesion-dependent reduction and recovery of Arf1 activation. Constitutively active Arf1 disrupts this regulation and prevents Golgi disorganization due to loss of adhesion. Adhesion-dependent Arf1 activation regulates its binding to the microtubule minus-end motor protein dynein to control Golgi reorganization, which is blocked by ciliobrevin. Adhesion-dependent Golgi organization controls its function, regulating cell surface glycosylation due to loss of adhesion, which is blocked by constitutively active Arf1. This study, hence, identified integrin-dependent cell-matrix adhesion to be a novel regulator of Arf1 activation, controlling Golgi organization and function in anchorage-dependent cells.
This article has an associated First Person interview with the first author of the paper. Summary: Integrin-dependent cell-matrix adhesion activates Arf1, which then recruits dynein to regulate Golgi organization and function along the microtubule network.
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Affiliation(s)
- Vibha Singh
- Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pune, Maharashtra 411008, India
| | - Chaitanya Erady
- Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pune, Maharashtra 411008, India
| | - Nagaraj Balasubramanian
- Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pune, Maharashtra 411008, India
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50
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Kindlin-1 Regulates Astrocyte Activation and Pain Sensitivity in Rats With Neuropathic Pain. Reg Anesth Pain Med 2018; 43:547-553. [PMID: 29677029 DOI: 10.1097/aap.0000000000000780] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND OBJECTIVES Astrocyte activation has been implicated in the pathogenesis of neuropathic pain, but the involvement of kindlin-1 in astrocyte activation and neuropathic pain has not yet been illustrated. Using a chronic constriction injury (CCI) rat model of neuropathic pain, we investigated the expression levels of kindlin-1 during neuropathic pain and the influences of kindlin-1 on regulating pain sensitivity. METHODS Neuropathic pain was induced in rats by CCI of the sciatic nerve. Rats were randomly assigned to 4 groups: sham operation, CCI, CCI + kindlin-1 short hairpin RNA (shRNA), and CCI + kindlin-1 groups. Animals in the CCI + kindling-1 shRNA and CCI + kindlin-1 groups were given kindlin-1 shRNA or kindlin-1 virus infection to reduce or overexpress kindlin-1, respectively. Kindlin-1 expression was persistently increased in rats 10 days after CCI. A large proportion of glial fibrillary acidic protein (GFAP)-positive astrocytes expressed kindlin-1 in spinal cord tissues of rats after CCI. RESULTS Compared with the sham operation group, CCI animals exhibited increased GFAP expression and GFAP-positive astrocytes in the spinal cord. Down-regulation of kindlin-1 reduced the up-regulation of GFAP in the spinal cord, whereas overexpression of kindlin-1 promoted elevation of GFAP levels. Kindlin-1 silencing elevated the mechanical and thermal pain thresholds of CCI rats (P < 0.05). However, overexpression of kindlin-1 aggravated CCI-induced pain sensitivity. CONCLUSIONS Kindlin-1 may regulate pain sensitivity by affecting activated astrocytes in the spinal cord. Inhibition of kindlin-1 may provide a novel paradigm for the management of neuropathic pain.
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