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Isayama K, Rini DM, Yamamoto Y, Suzuki T. Propionate regulates tight junction barrier by increasing endothelial-cell selective adhesion molecule in human intestinal Caco-2 cells. Exp Cell Res 2023; 425:113528. [PMID: 36842619 DOI: 10.1016/j.yexcr.2023.113528] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/02/2023] [Accepted: 02/23/2023] [Indexed: 02/26/2023]
Abstract
Regulation of the intestinal barrier is closely associated with intestinal microbial metabolism. This study investigated the role of propionate, a major short-chain fatty acid produced by intestinal microorganisms, in the regulation of the tight junction (TJ) barrier in human intestinal Caco-2 cells. Propionate strengthened TJ barrier integrity, as indicated by decreased permeability to macromolecules and increased transepithelial electrical resistance in Caco-2 cells. DNA microarray analysis revealed that propionate upregulated endothelial cell-selective adhesion molecule (ESAM), a TJ-associated protein, without any increase in other TJ proteins. The upregulation of ESAM was confirmed using quantitative reverse transcription-PCR, immunoblotting, and immunofluorescence analyses. Luciferase promoter analysis demonstrated that propionate induced the transcriptional activation of ESAM. The effects of propionate were sensitive to nilotinib inhibition of NR2C2. Overexpression of human ESAM (hESAM) in canine kidney epithelial MDCK-II cells lowered the permeability to macromolecules in a manner similar to that of propionate-treated Caco-2 cells. hESAM overexpression facilitated calcium-induced assembly of the TJ complex in MDCK-II cells. Taken together, propionate strengthened the intestinal TJ barrier by increasing ESAM levels in Caco-2 cells.
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Affiliation(s)
- Kana Isayama
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, 739-8528, Japan
| | - Dina Mustika Rini
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, 739-8528, Japan; Department of Food Technology, Faculty of Engineering, Universitas Pembangunan Nasional "Veteran", Surabaya, Jawa Timur, 60294, Indonesia
| | - Yoshinari Yamamoto
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, 739-8528, Japan
| | - Takuya Suzuki
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, 739-8528, Japan.
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2
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Excoffon KJDA, Avila CL, Alghamri MS, Kolawole AO. The magic of MAGI-1: A scaffolding protein with multi signalosomes and functional plasticity. Biol Cell 2022; 114:185-198. [PMID: 35389514 DOI: 10.1111/boc.202200014] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 04/01/2022] [Accepted: 04/04/2022] [Indexed: 11/29/2022]
Abstract
MAGI-1 is a critical cellular scaffolding protein with over 110 different cellular and microbial protein interactors. Since the discovery of MAGI-1 in 1997, MAGI-1 has been implicated in diverse cellular functions such as polarity, cell-cell communication, neurological processes, kidney function, and a host of diseases including cancer and microbial infection. Additionally, MAGI-1 has undergone nomenclature changes in response to the discovery of an additional PDZ domain, leading to lack of continuity in the literature. We address the nomenclature of MAGI-1 as well as summarize many of the critical functions of the known interactions. Given the importance of many of the interactors, such as human papillomavirus E6, the Coxsackievirus and adenovirus receptor (CAR), and PTEN, the enhancement or disruption of MAGI-based interactions has the potential to affect cellular functions that can potentially be harnessed as a therapeutic strategy for a variety of diseases.
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Affiliation(s)
| | - Christina L Avila
- Department of Biological Sciences, Wright State University, Dayton, Ohio, USA
| | - Mahmoud S Alghamri
- Department of Biological Sciences, Wright State University, Dayton, Ohio, USA
| | - Abimbola O Kolawole
- Department of Biological Sciences, Wright State University, Dayton, Ohio, USA
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3
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Liu Z, Chen L, Gao X, Zou R, Meng Q, Fu Q, Xie Y, Miao Q, Chen L, Tang X, Zhang S, Zhang H, Schroyen M. Quantitative proteomics reveals tissue-specific toxic mechanisms for acute hydrogen sulfide-induced injury of diverse organs in pig. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:150365. [PMID: 34555611 DOI: 10.1016/j.scitotenv.2021.150365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 09/09/2021] [Accepted: 09/12/2021] [Indexed: 06/13/2023]
Abstract
Hydrogen sulfide (H2S) is a highly toxic gas in many environmental and occupational places. It can induce multiple organ injuries particularly in lung, trachea and liver, but the relevant mechanisms remain poorly understood. In this study, we used a TMT-based discovery proteomics to identify key proteins and correlated molecular pathways involved in the pathogenesis of acute H2S-induced toxicity in porcine lung, trachea and liver tissues. Pigs were subjected to acute inhalation exposure of up to 250 ppm of H2S for 5 h for the first time. Changes in hematology and biochemical indexes, serum inflammatory cytokines and histopathology demonstrated that acute H2S exposure induced organs inflammatory injury and dysfunction in the porcine lung, trachea and liver. The proteomic data showed 51, 99 and 84 proteins that were significantly altered in lung, trachea and liver, respectively. Gene ontology (GO) annotation, KEGG pathway and protein-protein interaction (PPI) network analysis revealed that acute H2S exposure affected the three organs via different mechanisms that were relatively similar between lung and trachea. Further analysis showed that acute H2S exposure caused inflammatory damages in the porcine lung and trachea through activating complement and coagulation cascades, and regulating the hyaluronan metabolic process. Whereas antigen presentation was found in the lung but oxidative stress and cell apoptosis was observed exclusively in the trachea. In the liver, an induced dysfunction was associated with protein processing in the endoplasmic reticulum and lipid metabolism. Further validation of some H2S responsive proteins using western blotting indicated that our proteomics data were highly reliable. Collectively, these findings provide insight into toxic molecular mechanisms that could potentially be targeted for therapeutic intervention for acute H2S intoxication.
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Affiliation(s)
- Zhen Liu
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; Precision Livestock and Nutrition Unit, Gembloux Agro-Bio Tech, TERRA Teaching and Research Centre, University of Liège, Passage des Déportés 2, Gembloux 5030, Belgium
| | - Liang Chen
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Xin Gao
- State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
| | - Ruixia Zou
- Graduate School, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Qingshi Meng
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Qin Fu
- Proteomics and Metabolomics Facility, Institute of Biotechnology, Cornell University, Ithaca, NY 14853, USA
| | - Yanjiao Xie
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Qixiang Miao
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Lei Chen
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Xiangfang Tang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Sheng Zhang
- Proteomics and Metabolomics Facility, Institute of Biotechnology, Cornell University, Ithaca, NY 14853, USA
| | - Hongfu Zhang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Martine Schroyen
- Precision Livestock and Nutrition Unit, Gembloux Agro-Bio Tech, TERRA Teaching and Research Centre, University of Liège, Passage des Déportés 2, Gembloux 5030, Belgium
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4
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Rahmani A, Chew YL. Investigating the molecular mechanisms of learning and memory using Caenorhabditis elegans. J Neurochem 2021; 159:417-451. [PMID: 34528252 DOI: 10.1111/jnc.15510] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 08/15/2021] [Accepted: 09/08/2021] [Indexed: 11/30/2022]
Abstract
Learning is an essential biological process for survival since it facilitates behavioural plasticity in response to environmental changes. This process is mediated by a wide variety of genes, mostly expressed in the nervous system. Many studies have extensively explored the molecular and cellular mechanisms underlying learning and memory. This review will focus on the advances gained through the study of the nematode Caenorhabditis elegans. C. elegans provides an excellent system to study learning because of its genetic tractability, in addition to its invariant, compact nervous system (~300 neurons) that is well-characterised at the structural level. Importantly, despite its compact nature, the nematode nervous system possesses a high level of conservation with mammalian systems. These features allow the study of genes within specific sensory-, inter- and motor neurons, facilitating the interrogation of signalling pathways that mediate learning via defined neural circuits. This review will detail how learning and memory can be studied in C. elegans through behavioural paradigms that target distinct sensory modalities. We will also summarise recent studies describing mechanisms through which key molecular and cellular pathways are proposed to affect associative and non-associative forms of learning.
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Affiliation(s)
- Aelon Rahmani
- Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia, Australia
| | - Yee Lian Chew
- Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia, Australia
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5
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MAGI1, a Scaffold Protein with Tumor Suppressive and Vascular Functions. Cells 2021; 10:cells10061494. [PMID: 34198584 PMCID: PMC8231924 DOI: 10.3390/cells10061494] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/04/2021] [Accepted: 06/08/2021] [Indexed: 12/13/2022] Open
Abstract
MAGI1 is a cytoplasmic scaffolding protein initially identified as a component of cell-to-cell contacts stabilizing cadherin-mediated cell–cell adhesion in epithelial and endothelial cells. Clinical-pathological and experimental evidence indicates that MAGI1 expression is decreased in some inflammatory diseases, and also in several cancers, including hepatocellular carcinoma, colorectal, cervical, breast, brain, and gastric cancers and appears to act as a tumor suppressor, modulating the activity of oncogenic pathways such as the PI3K/AKT and the Wnt/β-catenin pathways. Genomic mutations and other mechanisms such as mechanical stress or inflammation have been described to regulate MAGI1 expression. Intriguingly, in breast and colorectal cancers, MAGI1 expression is induced by non-steroidal anti-inflammatory drugs (NSAIDs), suggesting a role in mediating the tumor suppressive activity of NSAIDs. More recently, MAGI1 was found to localize at mature focal adhesion and to regulate integrin-mediated adhesion and signaling in endothelial cells. Here, we review MAGI1′s role as scaffolding protein, recent developments in the understanding of MAGI1 function as tumor suppressor gene, its role in endothelial cells and its implication in cancer and vascular biology. We also discuss outstanding questions about its regulation and potential translational implications in oncology.
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Hartmann C, Schwietzer YA, Otani T, Furuse M, Ebnet K. Physiological functions of junctional adhesion molecules (JAMs) in tight junctions. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1862:183299. [DOI: 10.1016/j.bbamem.2020.183299] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 03/25/2020] [Accepted: 03/28/2020] [Indexed: 12/24/2022]
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Ghimire K, Zaric J, Alday-Parejo B, Seebach J, Bousquenaud M, Stalin J, Bieler G, Schnittler HJ, Rüegg C. MAGI1 Mediates eNOS Activation and NO Production in Endothelial Cells in Response to Fluid Shear Stress. Cells 2019; 8:cells8050388. [PMID: 31035633 PMCID: PMC6562810 DOI: 10.3390/cells8050388] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 04/24/2019] [Accepted: 04/26/2019] [Indexed: 12/24/2022] Open
Abstract
Fluid shear stress stimulates endothelial nitric oxide synthase (eNOS) activation and nitric oxide (NO) production through multiple kinases, including protein kinase A (PKA), AMP-activated protein kinase (AMPK), AKT and Ca2+/calmodulin-dependent protein kinase II (CaMKII). Membrane-associated guanylate kinase (MAGUK) with inverted domain structure-1 (MAGI1) is an adaptor protein that stabilizes epithelial and endothelial cell-cell contacts. The aim of this study was to assess the unknown role of endothelial cell MAGI1 in response to fluid shear stress. We show constitutive expression and co-localization of MAGI1 with vascular endothelial cadherin (VE-cadherin) in endothelial cells at cellular junctions under static and laminar flow conditions. Fluid shear stress increases MAGI1 expression. MAGI1 silencing perturbed flow-dependent responses, specifically, Krüppel-like factor 4 (KLF4) expression, endothelial cell alignment, eNOS phosphorylation and NO production. MAGI1 overexpression had opposite effects and induced phosphorylation of PKA, AMPK, and CAMKII. Pharmacological inhibition of PKA and AMPK prevented MAGI1-mediated eNOS phosphorylation. Consistently, MAGI1 silencing and PKA inhibition suppressed the flow-induced NO production. Endothelial cell-specific transgenic expression of MAGI1 induced PKA and eNOS phosphorylation in vivo and increased NO production ex vivo in isolated endothelial cells. In conclusion, we have identified endothelial cell MAGI1 as a previously unrecognized mediator of fluid shear stress-induced and PKA/AMPK dependent eNOS activation and NO production.
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Affiliation(s)
- Kedar Ghimire
- Pathology, Department of Oncology, Microbiology and Immunology, Section of Medicine, Faculty of Science and Medicine, University of Fribourg, Chemin du Musée 18, CH-1700 Fribourg, Switzerland.
| | - Jelena Zaric
- Pathology, Department of Oncology, Microbiology and Immunology, Section of Medicine, Faculty of Science and Medicine, University of Fribourg, Chemin du Musée 18, CH-1700 Fribourg, Switzerland.
| | - Begoña Alday-Parejo
- Pathology, Department of Oncology, Microbiology and Immunology, Section of Medicine, Faculty of Science and Medicine, University of Fribourg, Chemin du Musée 18, CH-1700 Fribourg, Switzerland.
| | - Jochen Seebach
- Institute of Anatomy and Vascular Biology, Westfälische, Wilhelms-Universität Münster, Vesaliusweg 2-4, D-48149 Münster, Germany.
- Cells-in-Motion Cluster of Excellence (EXC 1003-CiM), University of Muenster, D-48149 Muenster, Germany.
| | - Mélanie Bousquenaud
- Pathology, Department of Oncology, Microbiology and Immunology, Section of Medicine, Faculty of Science and Medicine, University of Fribourg, Chemin du Musée 18, CH-1700 Fribourg, Switzerland.
| | - Jimmy Stalin
- Pathology, Department of Oncology, Microbiology and Immunology, Section of Medicine, Faculty of Science and Medicine, University of Fribourg, Chemin du Musée 18, CH-1700 Fribourg, Switzerland.
| | - Grégory Bieler
- Pathology, Department of Oncology, Microbiology and Immunology, Section of Medicine, Faculty of Science and Medicine, University of Fribourg, Chemin du Musée 18, CH-1700 Fribourg, Switzerland.
| | - Hans-Joachim Schnittler
- Institute of Anatomy and Vascular Biology, Westfälische, Wilhelms-Universität Münster, Vesaliusweg 2-4, D-48149 Münster, Germany.
- Cells-in-Motion Cluster of Excellence (EXC 1003-CiM), University of Muenster, D-48149 Muenster, Germany.
| | - Curzio Rüegg
- Pathology, Department of Oncology, Microbiology and Immunology, Section of Medicine, Faculty of Science and Medicine, University of Fribourg, Chemin du Musée 18, CH-1700 Fribourg, Switzerland.
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8
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Sauteur L, Affolter M, Belting HG. Distinct and redundant functions of Esama and VE-cadherin during vascular morphogenesis. Development 2017; 144:1554-1565. [PMID: 28264837 DOI: 10.1242/dev.140038] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 02/28/2017] [Indexed: 01/08/2023]
Abstract
The cardiovascular system forms during early embryogenesis and adapts to embryonic growth by sprouting angiogenesis and vascular remodeling. These processes require fine-tuning of cell-cell adhesion to maintain and re-establish endothelial contacts, while allowing cell motility. We have compared the contribution of two endothelial cell-specific adhesion proteins, VE-cadherin (VE-cad/Cdh5) and Esama (endothelial cell-selective adhesion molecule a), during angiogenic sprouting and blood vessel fusion (anastomosis) in the zebrafish embryo by genetic analyses. Different combinations of mutant alleles can be placed into a phenotypic series with increasing defects in filopodial contact formation. Contact formation in esama mutants appears similar to wild type, whereas esama-/-; ve-cad+/- and ve-cad single mutants exhibit intermediate phenotypes. The lack of both proteins interrupts filopodial interaction completely. Furthermore, double mutants do not form a stable endothelial monolayer, and display intrajunctional gaps, dislocalization of Zo-1 and defects in apical-basal polarization. In summary, VE-cadherin and Esama have distinct and redundant functions during blood vessel morphogenesis, and both adhesion proteins are central to endothelial cell recognition during anastomosis.
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Affiliation(s)
- Loïc Sauteur
- Biozentrum der Universität Basel, Klingelbergstrasse 70, Basel CH-4056, Switzerland
| | - Markus Affolter
- Biozentrum der Universität Basel, Klingelbergstrasse 70, Basel CH-4056, Switzerland
| | - Heinz-Georg Belting
- Biozentrum der Universität Basel, Klingelbergstrasse 70, Basel CH-4056, Switzerland
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9
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Sudo T, Yokota T, Okuzaki D, Ueda T, Ichii M, Ishibashi T, Isono T, Habuchi Y, Oritani K, Kanakura Y. Endothelial Cell-Selective Adhesion Molecule Expression in Hematopoietic Stem/Progenitor Cells Is Essential for Erythropoiesis Recovery after Bone Marrow Injury. PLoS One 2016; 11:e0154189. [PMID: 27111450 PMCID: PMC4844162 DOI: 10.1371/journal.pone.0154189] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 04/11/2016] [Indexed: 02/01/2023] Open
Abstract
Numerous red blood cells are generated every second from proliferative progenitor cells under a homeostatic state. Increased erythropoietic activity is required after myelo-suppression as a result of chemo-radio therapies. Our previous study revealed that the endothelial cell-selective adhesion molecule (ESAM), an authentic hematopoietic stem cell marker, plays essential roles in stress-induced hematopoiesis. To determine the physiological importance of ESAM in erythroid recovery, ESAM-knockout (KO) mice were treated with the anti-cancer drug, 5-fluorouracil (5-FU). ESAM-KO mice experienced severe and prolonged anemia after 5-FU treatment compared to wild-type (WT) mice. Eight days after the 5-FU injection, compared to WT mice, ESAM-KO mice showed reduced numbers of erythroid progenitors in bone marrow (BM) and spleen, and reticulocytes in peripheral blood. Megakaryocyte-erythrocyte progenitors (MEPs) from the BM of 5-FU-treated ESAM-KO mice showed reduced burst forming unit-erythrocyte (BFU-E) capacities than those from WT mice. BM transplantation revealed that hematopoietic stem/progenitor cells from ESAM-KO donors were more sensitive to 5-FU treatment than that from WT donors in the WT host mice. However, hematopoietic cells from WT donors transplanted into ESAM-KO host mice could normally reconstitute the erythroid lineage after a BM injury. These results suggested that ESAM expression in hematopoietic cells, but not environmental cells, is critical for hematopoietic recovery. We also found that 5-FU treatment induces the up-regulation of ESAM in primitive erythroid progenitors and macrophages that do not express ESAM under homeostatic conditions. The phenotypic change seen in macrophages might be functionally involved in the interaction between erythroid progenitors and their niche components during stress-induced acute erythropoiesis. Microarray analyses of primitive erythroid progenitors from 5-FU-treated WT and ESAM-KO mice revealed that various signaling pathways, including the GATA1 system, were impaired in ESAM-KO mice. Thus, our data demonstrate that ESAM expression in hematopoietic progenitors is essential for erythroid recovery after a BM injury.
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Affiliation(s)
- Takao Sudo
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Takafumi Yokota
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
- * E-mail:
| | - Daisuke Okuzaki
- DNA Chip Development Center, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Tomoaki Ueda
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Michiko Ichii
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Tomohiko Ishibashi
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Tomomi Isono
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yoko Habuchi
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Kenji Oritani
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yuzuru Kanakura
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
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10
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Yan R, Sharma P, Kolawole AO, Martin SCT, Readler JM, Kotha PLN, Hostetler HA, Excoffon KJDA. The PDZ3 domain of the cellular scaffolding protein MAGI-1 interacts with the Coxsackievirus and adenovirus receptor (CAR). Int J Biochem Cell Biol 2015; 61:29-34. [PMID: 25622559 DOI: 10.1016/j.biocel.2015.01.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 12/31/2014] [Accepted: 01/16/2015] [Indexed: 10/24/2022]
Abstract
The Coxsackievirus and adenovirus receptor (CAR) is an essential cellular protein that is involved in cell-cell adhesion, protein trafficking, and viral infection. The major isoform of CAR is selectively sorted to the basolateral membrane of polarized epithelial cells where it co-localizes with the cellular scaffolding protein membrane-associated guanylate kinase with inverted domain structure-1 (MAGI-1). Previously, we demonstrated CAR interacts with MAGI-1 through a PDZ-domain dependent interaction. Here, we show that the PDZ3 domain of MAGI-1 is exclusively responsible for the high affinity interaction between the seven exon isoform of CAR and MAGI-1 using yeast-two-hybrid analysis and confirming this interaction biochemically and in cellular lysates by in vitro pull down assay and co-immunoprecipitation. The high affinity interaction between the PDZ3 domain and CAR C-terminus was measured by fluorescence resonance energy transfer. Further, we investigated the biological relevance of this high affinity interaction between CAR and the PDZ3 domain of MAGI-1 and found that it does not alter CAR-mediated adenovirus infection. By contrast, interruption of this high affinity interaction altered the localization of MAGI-1 indicating that CAR is able to traffic MAGI-1 to cell junctions. These data deepen the molecular understanding of the interaction between CAR and MAGI-1 and indicate that although CAR plays a role in trafficking PDZ-based scaffolding proteins to cellular junctions, association with a high affinity intracellular binding partner does not significantly alter adenovirus binding and entry via CAR.
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Affiliation(s)
- Ran Yan
- Department of Biological Sciences, Wright State University, Dayton, OH 45435, USA
| | - Priyanka Sharma
- Department of Biological Sciences, Wright State University, Dayton, OH 45435, USA
| | - Abimbola O Kolawole
- Department of Biological Sciences, Wright State University, Dayton, OH 45435, USA
| | - Sterling C T Martin
- Department of Biological Sciences, Wright State University, Dayton, OH 45435, USA
| | - James M Readler
- Department of Biological Sciences, Wright State University, Dayton, OH 45435, USA
| | - Poornima L N Kotha
- Department of Biological Sciences, Wright State University, Dayton, OH 45435, USA
| | - Heather A Hostetler
- Department of Biochemistry and Molecular Biology, Wright State University, Dayton, OH 45435, USA.
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11
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Bauer HC, Krizbai IA, Bauer H, Traweger A. "You Shall Not Pass"-tight junctions of the blood brain barrier. Front Neurosci 2014; 8:392. [PMID: 25520612 PMCID: PMC4253952 DOI: 10.3389/fnins.2014.00392] [Citation(s) in RCA: 165] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Accepted: 11/14/2014] [Indexed: 12/31/2022] Open
Abstract
The structure and function of the barrier layers restricting the free diffusion of substances between the central nervous system (brain and spinal cord) and the systemic circulation is of great medical interest as various pathological conditions often lead to their impairment. Excessive leakage of blood-borne molecules into the parenchyma and the concomitant fluctuations in the microenvironment following a transient breakdown of the blood-brain barrier (BBB) during ischemic/hypoxic conditions or because of an autoimmune disease are detrimental to the physiological functioning of nervous tissue. On the other hand, the treatment of neurological disorders is often hampered as only minimal amounts of therapeutic agents are able to penetrate a fully functional BBB or blood cerebrospinal fluid barrier. An in-depth understanding of the molecular machinery governing the establishment and maintenance of these barriers is necessary to develop rational strategies allowing a controlled delivery of appropriate drugs to the CNS. At the basis of such tissue barriers are intimate cell-cell contacts (zonulae occludentes, tight junctions) which are present in all polarized epithelia and endothelia. By creating a paracellular diffusion constraint TJs enable the vectorial transport across cell monolayers. More recent findings indicate that functional barriers are already established during development, protecting the fetal brain. As an understanding of the biogenesis of TJs might reveal the underlying mechanisms of barrier formation during ontogenic development numerous in vitro systems have been developed to study the assembly and disassembly of TJs. In addition, monitoring the stage-specific expression of TJ-associated proteins during development has brought much insight into the “developmental tightening” of tissue barriers. Over the last two decades a detailed molecular map of transmembrane and cytoplasmic TJ-proteins has been identified. These proteins not only form a cell-cell adhesion structure, but integrate various signaling pathways, thereby directly or indirectly impacting upon processes such as cell-cell adhesion, cytoskeletal rearrangement, and transcriptional control. This review will provide a brief overview on the establishment of the BBB during embryonic development in mammals and a detailed description of the ultrastructure, biogenesis, and molecular composition of epithelial and endothelial TJs will be given.
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Affiliation(s)
- Hans-Christian Bauer
- Institute of Tendon and Bone Regeneration, Paracelsus Medical University - Spinal Cord Injury and Tissue Regeneration Center Salzburg Salzburg, Austria ; Department of Traumatology and Sports Injuries, Paracelsus Medical University Salzburg, Austria ; Austrian Cluster for Tissue Regeneration Vienna, Austria
| | - István A Krizbai
- Biological Research Centre, Institute of Biophysics, Hungarian Academy of Sciences Szeged, Hungary ; Institute of Life Sciences, Vasile Goldis Western University of Arad Arad, Romania
| | - Hannelore Bauer
- Department of Organismic Biology, University of Salzburg Salzburg, Austria
| | - Andreas Traweger
- Institute of Tendon and Bone Regeneration, Paracelsus Medical University - Spinal Cord Injury and Tissue Regeneration Center Salzburg Salzburg, Austria ; Austrian Cluster for Tissue Regeneration Vienna, Austria
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12
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Daniel AE, van Buul JD. Endothelial junction regulation: a prerequisite for leukocytes crossing the vessel wall. J Innate Immun 2013; 5:324-35. [PMID: 23571667 DOI: 10.1159/000348828] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Accepted: 02/12/2013] [Indexed: 12/13/2022] Open
Abstract
The leukocytes of the innate immune system, especially neutrophils and monocytes, exit the circulation early in the response to local inflammation and infection. This is necessary to control and prevent the spread of infections before an adaptive immune response can be raised. The endothelial cells and the intercellular junctions that connect them form a barrier that leukocytes need to pass in order to get to the site of inflammation. The junctions are tightly regulated which ensures that leukocytes only exit when and where they are needed. This regulation is disturbed in many chronic inflammatory diseases which are characterized by ongoing recruitment and interstitial accumulation of leukocytes. In this review, we summarize the molecular mechanisms that regulate endothelial cell-cell junctions and prevent or permit leukocyte transendothelial migration.
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Affiliation(s)
- Anna E Daniel
- Department of Molecular Cell Biology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
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Schulz S, Steinberg T, Beck D, Tomakidi P, Accardi R, Tommasino M, Reinhard T, Eberwein P. Generation and evaluation of a human corneal model cell system for ophthalmologic issues using the HPV16 E6/E7 oncogenes as uniform immortalization platform. Differentiation 2013; 85:161-72. [DOI: 10.1016/j.diff.2013.06.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Accepted: 06/02/2013] [Indexed: 10/26/2022]
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Kacso IM, Bondor CI, Kacso G. Low serum endothelial cell-selective adhesion molecule predicts increase in albuminuria in type 2 diabetes patients. Int Urol Nephrol 2013; 45:1319-26. [PMID: 23292509 DOI: 10.1007/s11255-012-0365-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2012] [Accepted: 12/12/2012] [Indexed: 01/18/2023]
Abstract
PURPOSE The newly discovered endothelial cell-selective adhesion molecule (ESAM) stabilizes the interendothelial tight junction; it circulates in serum as a soluble fraction. In experimental diabetes, reduced ESAM expression in the kidney is associated with albuminuria. We investigated, for the first time, serum ESAM as a predictor of progression of kidney disease in type 2 diabetes (T2D). METHODS T2D non-nephrotic patients with glomerular filtration rate (GFR) > 30 ml/min were included. History, medication and laboratory evaluation were assessed at inclusion and the end of study; ESAM was determined at baseline. RESULTS Eighty-eight patients--mean age 63 ± 10.84 years, 49 (55.68 %) males--were prospectively followed up for 20 months. Baseline GFR was 76.37 ± 29.56 ml/min, and urinary albumin/creatinine ratio (UACR) 21.63(7.08-94.52) mg/g; ESAM was 12.85(6.13-19.83) ng/ml. Difference (Δ) in UACR between end of study and baseline was inversely related to serum albumin (r = -0.27, p = 0.017) and ESAM (r = -0.21, p = 0.047); ΔGFR correlated to glycated hemoglobin (r = 0.22, p = 0.05). In multiple regression, introducing variables susceptible to influence progression of kidney disease, ΔUACR was significantly related to log ESAM (p = 0.005) and ΔGFR to glycated hemoglobin (p = 0.016). CONCLUSION Serum ESAM is a predictor of worsening of albuminuria in T2D patients without advanced kidney disease.
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Affiliation(s)
- Ina Maria Kacso
- University of Medicine and Pharmacy "Iuliu Hatieganu" Cluj Napoca, Dornei 47 street, 400171, Cluj Napoca, Romania
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Abstract
BACKGROUND Endothelial cell-selective adhesion molecule (ESAM) contributes to the integrity of tight junctions and modulates endothelial function. ESAM has been linked to experimental diabetic nephropathy; its soluble fraction is related to atherosclerosis in humans. In this cross-sectional observational study, we describe for the first time serum ESAM in type 2 diabetic patients with different stages of chronic kidney disease (CKD) and its relationship to vascular endothelial growth factor-A (VEGF-A). Materials and methods We included diabetic patients with different stages of CKD and controls. History, laboratory evaluation, serum ESAM and VEGF-A and urinary albumin/creatinine ratio were obtained. RESULTS Endothelial cell-selective adhesion molecule was higher in non-CKD diabetic patients 13.80 (6.15-18.70) ng/mL (n=45) than controls 7.30 (4.60-9.40) ng/mL (n=48), P=0.001. VEGF-A had a similar pattern: 71.3 (54.75-120.70) vs. 43.20 (30.1-65.90) pg/mL, P<0.0001. ESAM was 10.4 (5.6-17.4) ng/mL in predialysis CKD patients (n=59) and 22.35 (8.55-29.95) ng/mL in dialysis patients (n=36), P<0.001. Patients with glomerular filtration rate (GFR)<15 mL/min had the highest ESAM (P=0.003). ESAM was similar in normoalbuminuric, microalbuminuric and proteinuric patients. ESAM was directly correlated with the duration of diabetes (r(2)=0.048, P=0.009), C-reactive protein (r(2)=0.028, P=0.05), VEGF-A (r(2)=0.040, P=0.01) and inversely with HbA1C (r(2)=0.036, P=0.03), haemoglobin (r(2)=0.062, P=0.005) and albumin (r(2)=0.0·40, P=0.026). In multiple regression diabetes duration, HbA1C and VEGF-A were significant predictors of ESAM. In controls, ESAM was inversely related to VEGF (r(2)=037, P=0.01). CONCLUSION Endothelial cell-selective adhesion molecule and VEGF-A are higher in patients with diabetes than in controls. The highest ESAM is found in dialysis patients. ESAM correlates with diabetes duration and control, inflammation and VEGF-A in patients with diabetes, but not in controls.
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Affiliation(s)
- Ina M Kacso
- Departments of Nephrology Oncology, University of Medicine and Pharmacy 'Iuliu Hatieganu' Cluj, Cluj Napoca, Romania
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Coisne C, Engelhardt B. Tight junctions in brain barriers during central nervous system inflammation. Antioxid Redox Signal 2011; 15:1285-303. [PMID: 21338320 DOI: 10.1089/ars.2011.3929] [Citation(s) in RCA: 136] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Homeostasis within the central nervous system (CNS) is a prerequisite to elicit proper neuronal function. The CNS is tightly sealed from the changeable milieu of the blood stream by the blood-brain barrier (BBB) and the blood-cerebrospinal fluid (CSF) barrier (BCSFB). Whereas the BBB is established by specialized endothelial cells of CNS microvessels, the BCSFB is formed by the epithelial cells of the choroid plexus. Both constitute physical barriers by a complex network of tight junctions (TJs) between adjacent cells. During many CNS inflammatory disorders, such as multiple sclerosis, human immunodeficiency virus infection, or Alzheimer's disease, production of pro-inflammatory cytokines, matrix metalloproteases, and reactive oxygen species are responsible for alterations of CNS barriers. Barrier dysfunction can contribute to neurological disorders in a passive way by vascular leakage of blood-borne molecules into the CNS and in an active way by guiding the migration of inflammatory cells into the CNS. Both ways may directly be linked to alterations in molecular composition, function, and dynamics of the TJ proteins. This review summarizes current knowledge on the cellular and molecular aspects of the functional and dysfunctional TJ complexes at the BBB and the BCSFB, with a particular emphasis on CNS inflammation and the role of reactive oxygen species.
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Affiliation(s)
- Caroline Coisne
- Theodor Kocher Institute, University of Bern, Bern, Switzerland.
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A systematic analysis of human papillomavirus (HPV) E6 PDZ substrates identifies MAGI-1 as a major target of HPV type 16 (HPV-16) and HPV-18 whose loss accompanies disruption of tight junctions. J Virol 2010; 85:1757-64. [PMID: 21123374 DOI: 10.1128/jvi.01756-10] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The E6 proteins from high-risk, cancer-causing types of human papillomavirus (HPV) are characterized by the presence of a PDZ (PSD95/Dlg/ZO-1) binding motif in their extreme carboxy termini, through which they interact with a number of cellular PDZ domain-containing substrates. In order to ascertain how many of these are degraded by E6 in vivo, we performed an extensive analysis of the effects of E6 ablation on the expression levels of a number of previously reported E6 PDZ substrates. Using HPV type 16 (HPV-16)-positive CaSKi cells and HPV-18-positive HeLa cells, we have found that MAGI-1 is a major degradation target of both HPV-16 and HPV-18 E6. In contrast, hDlg, hScrib, PTPN3, TIP2, FAP1, and PSD95 all exhibit various degrees of susceptibility to E6-induced degradation, and a high degree of HPV type specificity is observed for certain substrates. We also show that E6 preferentially targets MAGI-1 within the nucleus and at membrane sites. One of the direct consequences of MAGI-1 degradation is a loss of tight-junction integrity, as determined by mislocalization of the tight-junction protein ZO-1. Ablation of E6 expression restores tight junctions, and this restoration is dependent on the presence of MAGI-1. These results demonstrate that oncogenic HPV E6 proteins disrupt cellular tight junctions through the degradation of MAGI-1, and they provide further evidence of how the PDZ binding potential of E6 can contribute to HPV-induced malignancy.
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Cangara HM, Ishida T, Hara T, Sun L, Toh R, Rikitake Y, Kundu RK, Quertermous T, Hirata KI, Hayashi Y. Role of endothelial cell-selective adhesion molecule in hematogeneous metastasis. Microvasc Res 2010; 80:133-41. [PMID: 20153339 PMCID: PMC5316236 DOI: 10.1016/j.mvr.2010.02.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2009] [Revised: 02/04/2010] [Accepted: 02/04/2010] [Indexed: 01/01/2023]
Abstract
The spread of malignant cells from a localized tumor is thought to be directly related to the number of microvessels in the tumor. The endothelial cell-selective adhesion molecule (ESAM) is a member of the immunoglobulin superfamily that mediates homophilic interactions between endothelial cells. Previous studies have indicated that ESAM regulates angiogenesis in the primary tumor growth and endothelial permeability. In this study, we aimed to further elucidate the role of ESAM in tumor metastasis through angiogenic processes. ESAM expression was higher in hypervascular metastatic tumor tissues than in normal tissues in human lungs. Cell culture studies found that conditioned medium from B16F10 melanoma cells increased ESAM expression in endothelial cells and promoted endothelial migration and tube formation. The B16F10 medium-induced endothelial migration and tube formation were significantly attenuated when ESAM was downregulated by siRNA transfection. Intravenous injection of B16F10 cells into ESAM+/+ and ESAM-/- mice for comparison of metastatic potential resulted in the number of metastatic lung nodules in ESAM-/- mice being 83% lower than of those in ESAM+/+ mice. The microvascular density in the tumor was also lower in ESAM-/- than in ESAM+/+ mice. These findings indicate that ESAM regulates tumor metastasis through endothelial cell migration and tube formation in metastatic nodules. Inhibition of ESAM may therefore inhibit tumor metastasis by inhibiting the angiogenic processes.
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Affiliation(s)
- Husni M. Cangara
- Division of Molecular Medicine and Genetics, Department of Pathology, Kobe University Graduate School of Medicine, Kobe, Japan
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan
- Department of Pathology, Medical Faculty of Hasanuddin University, Makassar, Indonesia
| | - Tatsuro Ishida
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan
| | - Tetsuya Hara
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan
| | - Li Sun
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan
| | - Ryuji Toh
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan
| | - Yoshiyuki Rikitake
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan
| | - Ramendra K. Kundu
- Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Thomas Quertermous
- Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Ken-ichi Hirata
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan
| | - Yoshitake Hayashi
- Division of Molecular Medicine and Genetics, Department of Pathology, Kobe University Graduate School of Medicine, Kobe, Japan
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