1
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Wang W, Deng M, Li M, Liu L, Zou J, Qian Y. Exploring Corneal Neovascularization: An Integrated Approach Using Transcriptomics and Proteomics in an Alkali Burn Mouse Model. Invest Ophthalmol Vis Sci 2024; 65:21. [PMID: 38190126 PMCID: PMC10777872 DOI: 10.1167/iovs.65.1.21] [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: 09/27/2023] [Accepted: 12/19/2023] [Indexed: 01/09/2024] Open
Abstract
Purpose Corneal neovascularization (CNV) impairs corneal transparency and visual acuity. The study aims to deepen our understanding of the molecules involved in CNV induced by alkali burns, facilitate a better grasp of CNV mechanisms, and uncover potential therapeutic targets. Methods Eighty-four mice were selected for establishing CNV models via alkali burns. On days 3, 7, and 14 after the burns, corneal observations and histological investigations were conducted. An integrated analysis of RNA sequencing (RNA-seq)-based transcriptomics and label-free quantitative proteomics was performed in both normal and burned corneas. Bioinformatics approaches, encompassing Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis, were applied to discern differentially expressed genes (DEGs) and crucial signaling pathways. Four potentially CNV-related genes were validated using quantitative real-time PCR (qRT-PCR) and Western blot. Results Significant CNV was observed on the seventh day. Forty-one genes were differentially expressed in neovascularized corneas, with 15 upregulated and 26 downregulated at both mRNA and protein levels. Bioinformatics analysis revealed that these DEGs participated in diverse biological processes, encompassing retinol and retinoic acid metabolism, neutrophil chemotaxis, and actin filament assembly, along with significant enrichment pathways like cytochrome P450, tyrosine, and phenylalanine metabolism. The upregulation of lymphocyte cytosolic protein 1 (LCP1) and cysteine and glycine-rich protein 2 (CSRP2) genes and the downregulation of transglutaminase 2 (TGM2) and transforming growth factor-beta-induced (TGFBI) genes were confirmed. Conclusions We analyzed gene expression differences in mouse corneas 7 days after alkali burns, finding 41 genes with altered expression. The exact role of these genes in CNV is not fully understood, but exploring angiogenesis-related molecules offers potential for CNV treatment or prevention.
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Affiliation(s)
- Wei Wang
- Department of Ophthalmology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Manli Deng
- Department of Ophthalmology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Min Li
- Department of Ophthalmology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Lin Liu
- Department of Ophthalmology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Jun Zou
- Department of Ophthalmology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yiyong Qian
- Department of Ophthalmology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
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2
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Aretz J, Aziz M, Strohmeyer N, Sattler M, Fässler R. Talin and kindlin use integrin tail allostery and direct binding to activate integrins. Nat Struct Mol Biol 2023; 30:1913-1924. [PMID: 38087085 PMCID: PMC10716038 DOI: 10.1038/s41594-023-01139-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 09/26/2023] [Indexed: 12/18/2023]
Abstract
Integrin affinity regulation, also termed integrin activation, is essential for metazoan life. Although talin and kindlin binding to the β-integrin cytoplasmic tail is indispensable for integrin activation, it is unknown how they achieve this function. By combining NMR, biochemistry and cell biology techniques, we found that talin and kindlin binding to the β-tail can induce a conformational change that increases talin affinity and decreases kindlin affinity toward it. We also discovered that this asymmetric affinity regulation is accompanied by a direct interaction between talin and kindlin, which promotes simultaneous binding of talin and kindlin to β-tails. Disrupting allosteric communication between the β-tail-binding sites of talin and kindlin or their direct interaction in cells severely compromised integrin functions. These data show how talin and kindlin cooperate to generate a small but critical population of ternary talin-β-integrin-kindlin complexes with high talin-integrin affinity and high dynamics.
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Affiliation(s)
- Jonas Aretz
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Masood Aziz
- Department of Bioscience, Technical University of Munich, TUM School of Natural Sciences, Garching, Germany
- Helmholtz Munich, Institute of Structural Biology, Neuherberg, Germany
| | - Nico Strohmeyer
- Department of Biosystems Science and Engineering, Eidgenössische Technische Hochschule Zürich, Basel, Switzerland
| | - Michael Sattler
- Department of Bioscience, Technical University of Munich, TUM School of Natural Sciences, Garching, Germany
- Helmholtz Munich, Institute of Structural Biology, Neuherberg, Germany
| | - Reinhard Fässler
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany.
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3
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Joshi H, Morley SC. Efficient T Cell Migration and Activation Require L-Plastin. Front Immunol 2022; 13:916137. [PMID: 35844504 PMCID: PMC9277003 DOI: 10.3389/fimmu.2022.916137] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 06/02/2022] [Indexed: 11/28/2022] Open
Abstract
Rapid re-organization of the actin cytoskeleton supports T-cell trafficking towards immune sites and interaction with antigen presenting cells (APCs). F-actin rearrangement enables T-cell trafficking by stabilizing adhesion to vascular endothelial cells and promoting transendothelial migration. T-cell/APC immune synapse (IS) maturation also relies upon f-actin-anchored LFA-1:ICAM-1 ligation. Therefore, efficient T-cell responses require tight regulation of f-actin dynamics. In this review, we summarize how the actin-bundling protein L-plastin (LPL) regulates T-cell activation and migration. LPL enhances f-actin polymerization and also directly binds to the β2 chain of the integrin LFA-1 to support intercellular adhesion and IS formation in human and murine T cells. LPL- deficient T cells migrate slowly in response to chemo-attractants such as CXCL12, CCL19, and poorly polarize towards ICAM-1. Loss of LPL impairs thymic egress and intranodal motility. LPL is also required for T-cell IS maturation with APCs, and therefore for efficient cytokine production and proliferation. LPL-/- mice are less susceptible to T-cell mediated pathologies, such as allograft rejection and experimental autoimmune encephalomyelitis (EAE). LPL activity is regulated by its N-terminal “headpiece”, which contains serine and threonine phosphorylation and calcium- and calmodulin-binding sites. LPL phosphorylation is required for lamellipodia formation during adhesion and migration, and also for LFA-1 clustering during IS formation. However, the precise molecular interactions by which LPL supports T-cell functional responses remain unclear. Future studies elucidating LPL-mediated regulation of T-cell migration and/or activation may illuminate pathways for therapeutic targeting in T-cell-mediated diseases.
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Affiliation(s)
- Hemant Joshi
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, MO, United States
- Division of Immunobiology, Department of Immunology and Pathology, Washington University School of Medicine, St. Louis, MO, United States
| | - Sharon Celeste Morley
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, MO, United States
- Division of Immunobiology, Department of Immunology and Pathology, Washington University School of Medicine, St. Louis, MO, United States
- *Correspondence: Sharon Celeste Morley,
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4
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Allosteric regulation controls actin-bundling properties of human plastins. Nat Struct Mol Biol 2022; 29:519-528. [PMID: 35589838 DOI: 10.1038/s41594-022-00771-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 04/05/2022] [Indexed: 11/08/2022]
Abstract
Plastins/fimbrins are conserved actin-bundling proteins contributing to motility, cytokinesis and other cellular processes by organizing strikingly different actin assemblies as in aligned bundles and branched networks. We propose that this ability of human plastins stems from an allosteric communication between their actin-binding domains (ABD1/2) engaged in a tight spatial association. Here we show that ABD2 can bind actin three orders of magnitude stronger than ABD1, unless the domains are involved in an equally strong inhibitory engagement. A mutation mimicking physiologically relevant phosphorylation at the ABD1-ABD2 interface greatly weakened their association, dramatically potentiating actin cross-linking. Cryo-EM reconstruction revealed the ABD1-actin interface and enabled modeling of the plastin bridge and domain separation in parallel bundles. We predict that a strong and tunable allosteric inhibition between the domains allows plastins to modulate the cross-linking strength, contributing to remodeling of actin assemblies of different morphologies defining the unique place of plastins in actin organization.
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Beckman EJ, Martins F, Suzuki TA, Bi K, Keeble S, Good JM, Chavez AS, Ballinger MA, Agwamba K, Nachman MW. The genomic basis of high-elevation adaptation in wild house mice (Mus musculus domesticus) from South America. Genetics 2022; 220:iyab226. [PMID: 34897431 PMCID: PMC9097263 DOI: 10.1093/genetics/iyab226] [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: 09/29/2021] [Accepted: 12/04/2021] [Indexed: 11/14/2022] Open
Abstract
Understanding the genetic basis of environmental adaptation in natural populations is a central goal in evolutionary biology. The conditions at high elevation, particularly the low oxygen available in the ambient air, impose a significant and chronic environmental challenge to metabolically active animals with lowland ancestry. To understand the process of adaptation to these novel conditions and to assess the repeatability of evolution over short timescales, we examined the signature of selection from complete exome sequences of house mice (Mus musculus domesticus) sampled across two elevational transects in the Andes of South America. Using phylogenetic analysis, we show that house mice colonized high elevations independently in Ecuador and Bolivia. Overall, we found distinct responses to selection in each transect and largely nonoverlapping sets of candidate genes, consistent with the complex nature of traits that underlie adaptation to low oxygen availability (hypoxia) in other species. Nonetheless, we also identified a small subset of the genome that appears to be under parallel selection at the gene and SNP levels. In particular, three genes (Col22a1, Fgf14, and srGAP1) bore strong signatures of selection in both transects. Finally, we observed several patterns that were common to both transects, including an excess of derived alleles at high elevation, and a number of hypoxia-associated genes exhibiting a threshold effect, with a large allele frequency change only at the highest elevations. This threshold effect suggests that selection pressures may increase disproportionately at high elevations in mammals, consistent with observations of some high-elevation diseases in humans.
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Affiliation(s)
- Elizabeth J Beckman
- Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Felipe Martins
- Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Taichi A Suzuki
- Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, Berkeley, CA 94720, USA
- Department of Microbiome Science, Max Planck Institute for Developmental Biology, Tübingen 72076, Germany
| | - Ke Bi
- Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Sara Keeble
- Division of Biological Sciences, University of Montana, Missoula, MT 59812, USA
| | - Jeffrey M Good
- Division of Biological Sciences, University of Montana, Missoula, MT 59812, USA
- Wildlife Biology Program, University of Montana, Missoula, MT 59812, USA
| | - Andreas S Chavez
- Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, Berkeley, CA 94720, USA
- Department of Evolution, Ecology, and Organismal Biology and the Translational Data Analytics Institute, The Ohio State University, Columbus, OH 43210, USA
| | - Mallory A Ballinger
- Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Kennedy Agwamba
- Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Michael W Nachman
- Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, Berkeley, CA 94720, USA
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Böttcher RT, Strohmeyer N, Aretz J, Fässler R. New insights into the phosphorylation of the threonine motif of the β1 integrin cytoplasmic domain. Life Sci Alliance 2022; 5:5/4/e202101301. [PMID: 34996844 PMCID: PMC8761493 DOI: 10.26508/lsa.202101301] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 12/23/2021] [Accepted: 12/23/2021] [Indexed: 01/18/2023] Open
Abstract
Integrins require an activation step before ligand binding and signaling that is mediated by talin and kindlin binding to the β integrin cytosolic domain (β-tail). Conflicting reports exist about the contribution of phosphorylation of a conserved threonine motif in the β1-tail (β1-pT788/pT789) to integrin activation. We show that widely used and commercially available antibodies against β1-pT788/pT789 integrin do not detect specific β1-pT788/pT789 integrin signals in immunoblots of several human and mouse cell lysates but bind bi-phosphorylated threonine residues in numerous proteins, which were identified by mass spectrometry experiments. Furthermore, we found that fibroblasts and epithelial cells expressing the phospho-mimicking β1-TT788/789DD integrin failed to activate β1 integrins and displayed reduced integrin ligand binding, adhesion initiation and cell spreading. These cellular defects are specifically caused by the inability of kindlin to bind β1-tail polypeptides carrying a phosphorylated threonine motif or phospho-mimicking TT788/789DD substitutions. Our findings indicate that the double-threonine motif in β1-class integrins is not a major phosphorylation site but if phosphorylated would curb integrin function.
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Affiliation(s)
- Ralph T Böttcher
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Nico Strohmeyer
- Department of Biosystems Science and Engineering, Eidgenössische Technische Hochschule Zurich, Basel, Switzerland
| | - Jonas Aretz
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Reinhard Fässler
- Department of Molecular Medicine, Max Planck Institute of Biochemistry, Martinsried, Germany
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7
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Wu J, Cao J, Fan Y, Li C, Hu X. Comprehensive analysis of miRNA-mRNA regulatory network and potential drugs in chronic chagasic cardiomyopathy across human and mouse. BMC Med Genomics 2021; 14:283. [PMID: 34844599 PMCID: PMC8628461 DOI: 10.1186/s12920-021-01134-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Accepted: 11/18/2021] [Indexed: 02/07/2023] Open
Abstract
Background Chronic chagasic cardiomyopathy (CCC) is the leading cause of heart failure in Latin America and often causes severe inflammation and fibrosis in the heart. Studies on myocardial function and its molecular mechanisms in patients with Chronic chagasic cardiomyopathy are very limited. In order to understand the development and progression of Chronic chagasic cardiomyopathy and find targets for its diagnosis and treatment, the field needs to better understand the exact molecular mechanisms involved in these processes. Methods The mRNA microarray datasets GSE84796 (human) and GSE24088 (mouse) were obtained from the Gene Expression Omnibus (GEO) database. Homologous genes between the two species were identified using the online database mining tool Biomart, followed by differential expression analysis, gene enrichment analysis and protein–protein interaction (PPI) network construction. Cytohubba plug-in of Cytoscape software was used to identify Hub gene, and miRNet was used to construct the corresponding miRNA–mRNA regulatory network. miRNA-related databases: miRDB, Targetscan and miRWalk were used to further evaluate miRNAs in the miRNA–mRNA network. Furthermore, Comparative Toxicogenomics Database (CTD) and L1000 Platform were used to identify hub gene-related drugs. Results A total of 86 homologous genes were significantly differentially expressed in the two datasets, including 73 genes with high expression and 13 genes with low expression. These differentially expressed genes were mainly enriched in the terms of innate immune response, signal transduction, protein binding, Natural killer cell mediated cytotoxicity, Tuberculosis, Chemokine signaling pathway, Chagas disease and PI3K−Akt signaling pathway. The top 10 hub genes LAPTM5, LCP1, HCLS1, CORO1A, CD48, TYROBP, RAC2, ARHGDIB, FERMT3 and NCF4 were identified from the PPI network. A total of 122 miRNAs were identified to target these hub genes and 30 of them regulated two or more hub genes at the same time. miRDB, Targetscan and miRWalk were further analyzed and screened out hsa-miR-34c-5p, hsa-miR-34a-5p and hsa-miR-16-5p as miRNAs regulating these hub genes. Finally, Progesterone, Flutamide, Nimesulide, Methotrexate and Temozolomide were identified to target these hub genes and might be targeted therapies for Chronic chagasic cardiomyopathy. Conclusions In this study, the potential genes associated with Chronic chagasic cardiomyopathy are identified and a miRNA–mRNA regulatory network is constructed. This study explores the molecular mechanisms of Chronic chagasic cardiomyopathy and provides important clues for finding new therapeutic targets. Supplementary Information The online version contains supplementary material available at 10.1186/s12920-021-01134-3.
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Affiliation(s)
- Jiahe Wu
- Department of Cardiology, Zhongnan Hospital of Wuhan University, No. 169 Donghu Road, Wuchang District, Wuhan, 430071, China.,Institute of Myocardial Injury and Repair, Wuhan University, Wuhan, China
| | - Jianlei Cao
- Department of Cardiology, Zhongnan Hospital of Wuhan University, No. 169 Donghu Road, Wuchang District, Wuhan, 430071, China. .,Institute of Myocardial Injury and Repair, Wuhan University, Wuhan, China.
| | - Yongzhen Fan
- Department of Cardiology, Zhongnan Hospital of Wuhan University, No. 169 Donghu Road, Wuchang District, Wuhan, 430071, China.,Institute of Myocardial Injury and Repair, Wuhan University, Wuhan, China
| | - Chenze Li
- Department of Cardiology, Zhongnan Hospital of Wuhan University, No. 169 Donghu Road, Wuchang District, Wuhan, 430071, China.,Institute of Myocardial Injury and Repair, Wuhan University, Wuhan, China
| | - Xiaorong Hu
- Department of Cardiology, Zhongnan Hospital of Wuhan University, No. 169 Donghu Road, Wuchang District, Wuhan, 430071, China. .,Institute of Myocardial Injury and Repair, Wuhan University, Wuhan, China.
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8
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Sáinz-Jaspeado M, Smith RO, Plunde O, Pawelzik SC, Jin Y, Nordling S, Ding Y, Aspenström P, Hedlund M, Bastianello G, Ascione F, Li Q, Demir CS, Fernando D, Daniel G, Franco-Cereceda A, Kroon J, Foiani M, Petrova TV, Kilimann MW, Bäck M, Claesson-Welsh L. Palmdelphin Regulates Nuclear Resilience to Mechanical Stress in the Endothelium. Circulation 2021; 144:1629-1645. [PMID: 34636652 PMCID: PMC8589083 DOI: 10.1161/circulationaha.121.054182] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Supplemental Digital Content is available in the text. PALMD (palmdelphin) belongs to the family of paralemmin proteins implicated in cytoskeletal regulation. Single nucleotide polymorphisms in the PALMD locus that result in reduced expression are strong risk factors for development of calcific aortic valve stenosis and predict severity of the disease.
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Affiliation(s)
- Miguel Sáinz-Jaspeado
- Rudbeck, Beijer and SciLifeLab Laboratories, Department of Immunology, Genetics and Pathology (M.S.-J., R.O.S., Y.J., S.N., Y.D., P.A., M.H., L.C.-W.), Uppsala University, Sweden
| | - Ross O Smith
- Rudbeck, Beijer and SciLifeLab Laboratories, Department of Immunology, Genetics and Pathology (M.S.-J., R.O.S., Y.J., S.N., Y.D., P.A., M.H., L.C.-W.), Uppsala University, Sweden
| | - Oscar Plunde
- Department of Medicine Solna, Karolinska Institutet and Department of Cardiology, Karolinska University Hospital Stockholm, Sweden (O.P., S.-C.P., M.B.)
| | - Sven-Christian Pawelzik
- Department of Medicine Solna, Karolinska Institutet and Department of Cardiology, Karolinska University Hospital Stockholm, Sweden (O.P., S.-C.P., M.B.)
| | - Yi Jin
- Rudbeck, Beijer and SciLifeLab Laboratories, Department of Immunology, Genetics and Pathology (M.S.-J., R.O.S., Y.J., S.N., Y.D., P.A., M.H., L.C.-W.), Uppsala University, Sweden
| | - Sofia Nordling
- Rudbeck, Beijer and SciLifeLab Laboratories, Department of Immunology, Genetics and Pathology (M.S.-J., R.O.S., Y.J., S.N., Y.D., P.A., M.H., L.C.-W.), Uppsala University, Sweden
| | - Yindi Ding
- Rudbeck, Beijer and SciLifeLab Laboratories, Department of Immunology, Genetics and Pathology (M.S.-J., R.O.S., Y.J., S.N., Y.D., P.A., M.H., L.C.-W.), Uppsala University, Sweden
| | - Pontus Aspenström
- Rudbeck, Beijer and SciLifeLab Laboratories, Department of Immunology, Genetics and Pathology (M.S.-J., R.O.S., Y.J., S.N., Y.D., P.A., M.H., L.C.-W.), Uppsala University, Sweden
| | - Marie Hedlund
- Rudbeck, Beijer and SciLifeLab Laboratories, Department of Immunology, Genetics and Pathology (M.S.-J., R.O.S., Y.J., S.N., Y.D., P.A., M.H., L.C.-W.), Uppsala University, Sweden
| | - Giulia Bastianello
- IFOM-FIRC (institute of molecular oncology - Fondazione italiana per la ricerca sul cancro), Milano, Italy (G.B., F.A., Q.L., M.F.).,University of Milan, Italy (G.B., M.F.)
| | - Flora Ascione
- IFOM-FIRC (institute of molecular oncology - Fondazione italiana per la ricerca sul cancro), Milano, Italy (G.B., F.A., Q.L., M.F.)
| | - Qingsen Li
- IFOM-FIRC (institute of molecular oncology - Fondazione italiana per la ricerca sul cancro), Milano, Italy (G.B., F.A., Q.L., M.F.)
| | - Cansaran Saygili Demir
- Department of Oncology, University of Lausanne, Switzerland (C.S.D., T.V.P.).,Ludwig Institute for Cancer Research Lausanne, Switzerland (C.S.D., T.V.P.)
| | - Dinesh Fernando
- Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences, Uppsala (D.F., G.D.)
| | - Geoffrey Daniel
- Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences, Uppsala (D.F., G.D.)
| | - Anders Franco-Cereceda
- Department of Molecular Medicine and Surgery, Karolinska Institutet, and Department of Cardiothoracic Surgery, Karolinska University Hospital, Stockholm, Sweden (A.F.-C.)
| | - Jeffrey Kroon
- Department of Experimental Vascular Medicine, Amsterdam Cardiovascular Sciences, University of Amsterdam, Amsterdam University Medical Center, The Netherlands (J.K.)
| | - Marco Foiani
- IFOM-FIRC (institute of molecular oncology - Fondazione italiana per la ricerca sul cancro), Milano, Italy (G.B., F.A., Q.L., M.F.).,University of Milan, Italy (G.B., M.F.)
| | - Tatiana V Petrova
- Department of Oncology, University of Lausanne, Switzerland (C.S.D., T.V.P.).,Ludwig Institute for Cancer Research Lausanne, Switzerland (C.S.D., T.V.P.)
| | - Manfred W Kilimann
- Department of Neuroscience (M.W.K.), Uppsala University, Sweden.,Department of Molecular Neurobiology, Max Planck Institute for Experimental Medicine, Göttingen, Germany (M.W.K.)
| | - Magnus Bäck
- Department of Medicine Solna, Karolinska Institutet and Department of Cardiology, Karolinska University Hospital Stockholm, Sweden (O.P., S.-C.P., M.B.)
| | - Lena Claesson-Welsh
- Rudbeck, Beijer and SciLifeLab Laboratories, Department of Immunology, Genetics and Pathology (M.S.-J., R.O.S., Y.J., S.N., Y.D., P.A., M.H., L.C.-W.), Uppsala University, Sweden
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9
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Rung S, Zhao X, Chu C, Yang R, Qu Y, Man Y. Application of Epigallocatechin-3-gallate (EGCG) Modified 1-Ethyl-3-(3-dimethylaminopropylcarbodiimide hydrochloride/N-hydroxy-succinimide (EDC/NHS) Cross-Linked Collagen Membrane to Promote Macrophage Adhesion. MATERIALS 2021; 14:ma14164660. [PMID: 34443183 PMCID: PMC8398046 DOI: 10.3390/ma14164660] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 07/23/2021] [Accepted: 08/10/2021] [Indexed: 02/05/2023]
Abstract
The chemically cross-linking 1-ethyl-3-(3-dimethylaminopropylcarbodiimide hydrochloride/N-hydroxy-succinimide (EDC/NHS) collagen membrane endows such natural polymers with promising mechanical properties. Nevertheless, it is inadequate to advance the modulation of foreign body response (FBR) after implantation or guidance of tissue regeneration. In previous research, macrophages have a strong regulatory effect on regeneration, and such enhanced membranes underwent the modification with Epigallocatechin-3-gallate (EGCG) could adjust the recruitment and phenotypes of macrophages. Accordingly, we develop EGCG-EDC/NHS membranes, prepared with physical immersion, while focusing on the surface morphology through SEM, the biological activity of collagen was determined by FTIR, the activity and adhesion of cell culture in vitro, angiogenesis and monocyte/macrophage recruitment after subcutaneous implantation in vivo, are characterized. It could be concluded that it is hopeful EGCG-EDC/NHS collagen membrane can be used in implant dentistry for it not only retains the advantages of the collagen membrane itself, but also improves cell viability, adhesion, vascularization, and immunoregulation tendency.
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Affiliation(s)
- Shengan Rung
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; (S.R.); (X.Z.); (C.C.); (R.Y.)
- Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xiwen Zhao
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; (S.R.); (X.Z.); (C.C.); (R.Y.)
- Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Chenyu Chu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; (S.R.); (X.Z.); (C.C.); (R.Y.)
- Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Renli Yang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; (S.R.); (X.Z.); (C.C.); (R.Y.)
- Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Yili Qu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; (S.R.); (X.Z.); (C.C.); (R.Y.)
- Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
- Correspondence: (Y.Q.); (Y.M.)
| | - Yi Man
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China; (S.R.); (X.Z.); (C.C.); (R.Y.)
- Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
- Correspondence: (Y.Q.); (Y.M.)
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Activation and suppression of hematopoietic integrins in hemostasis and immunity. Blood 2020; 135:7-16. [DOI: 10.1182/blood.2019003336] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 10/31/2019] [Indexed: 12/15/2022] Open
Abstract
Nolte and Margadant review the current understanding of the activation and inactivation of integrin receptors expressed by hematopoietic cells and the role of these conformational changes in modulating platelet and leukocyte function.
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Regulation of cell adhesion: a collaborative effort of integrins, their ligands, cytoplasmic actors, and phosphorylation. Q Rev Biophys 2019; 52:e10. [PMID: 31709962 DOI: 10.1017/s0033583519000088] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Integrins are large heterodimeric type 1 membrane proteins expressed in all nucleated mammalian cells. Eighteen α-chains and eight β-chains can combine to form 24 different integrins. They are cell adhesion proteins, which bind to a large variety of cellular and extracellular ligands. Integrins are required for cell migration, hemostasis, translocation of cells out from the blood stream and further movement into tissues, but also for the immune response and tissue morphogenesis. Importantly, integrins are not usually active as such, but need activation to become adhesive. Integrins are activated by outside-in activation through integrin ligand binding, or by inside-out activation through intracellular signaling. An important question is how integrin activity is regulated, and this topic has recently drawn much attention. Changes in integrin affinity for ligand binding are due to allosteric structural alterations, but equally important are avidity changes due to integrin clustering in the plane of the plasma membrane. Recent studies have partially solved how integrin cell surface structures change during activation. The integrin cytoplasmic domains are relatively short, but by interacting with a variety of cytoplasmic proteins in a regulated manner, the integrins acquire a number of properties important not only for cell adhesion and movement, but also for cellular signaling. Recent work has shown that specific integrin phosphorylations play pivotal roles in the regulation of integrin activity. Our purpose in this review is to integrate the present knowledge to enable an understanding of how cell adhesion is dynamically regulated.
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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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13
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Soto-Ribeiro M, Kastberger B, Bachmann M, Azizi L, Fouad K, Jacquier MC, Boettiger D, Bouvard D, Bastmeyer M, Hytönen VP, Wehrle-Haller B. β1D integrin splice variant stabilizes integrin dynamics and reduces integrin signaling by limiting paxillin recruitment. J Cell Sci 2019; 132:jcs.224493. [PMID: 30890648 DOI: 10.1242/jcs.224493] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 03/08/2019] [Indexed: 12/30/2022] Open
Abstract
Heterodimeric integrin receptors control cell adhesion, migration and extracellular matrix assembly. While the α integrin subunit determines extracellular ligand specificity, the β integrin chain binds to an acidic residue of the ligand, and cytoplasmic adapter protein families such as talins, kindlins and paxillin, to form mechanosensing cell matrix adhesions. Alternative splicing of the β1 integrin cytoplasmic tail creates ubiquitously expressed β1A, and the heart and skeletal muscle-specific β1D form. To study the physiological difference between these forms, we developed fluorescent β1 integrins and analyzed their dynamics, localization, and cytoplasmic adapter recruitment and effects on cell proliferation. On fibronectin, GFP-tagged β1A integrin showed dynamic exchange in peripheral focal adhesions, and long, central fibrillar adhesions. In contrast, GFP-β1D integrins exchanged slowly, forming immobile and short central adhesions. While adhesion recruitment of GFP-β1A integrin was sensitive to C-terminal tail mutagenesis, GFP-β1D integrin was recruited independently of the distal NPXY motif. In addition, a P786A mutation in the proximal, talin-binding NPXY783 motif switched β1D to a highly dynamic integrin. In contrast, the inverse A786P mutation in β1A integrin interfered with paxillin recruitment and proliferation. Thus, differential β1 integrin splicing controls integrin-dependent adhesion signaling, to adapt to the specific physiological needs of differentiated muscle cells.
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Affiliation(s)
- Martinho Soto-Ribeiro
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, 1211 Geneva 4, Switzerland
| | - Birgit Kastberger
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, 1211 Geneva 4, Switzerland
| | - Michael Bachmann
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, 1211 Geneva 4, Switzerland.,Zoological Institute, Cell- and Neurobiology, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Latifeh Azizi
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, FI-33520 Tampere, Finland.,Fimlab Laboratories, Biokatu 4, FI-33520 Tampere, Finland
| | - Kenza Fouad
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, 1211 Geneva 4, Switzerland
| | - Marie-Claude Jacquier
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, 1211 Geneva 4, Switzerland
| | - David Boettiger
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, 1211 Geneva 4, Switzerland
| | - Daniel Bouvard
- Université Grenoble Alpes, Institute for Advanced Bioscience, INSERM U823, F-38042 Grenoble, France
| | - Martin Bastmeyer
- Zoological Institute, Cell- and Neurobiology, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Vesa P Hytönen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, FI-33520 Tampere, Finland.,Fimlab Laboratories, Biokatu 4, FI-33520 Tampere, Finland
| | - Bernhard Wehrle-Haller
- Department of Cell Physiology and Metabolism, University of Geneva, Centre Médical Universitaire, Rue Michel-Servet 1, 1211 Geneva 4, Switzerland
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