1
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Liaqat K, Treat K, Wilson TE, Conboy E, Vetrini F. Further evidence of involvement of ITSN1 in autosomal dominant neurodevelopmental disorder. Clin Genet 2024; 105:455-456. [PMID: 38346866 DOI: 10.1111/cge.14497] [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: 12/20/2023] [Revised: 01/23/2024] [Accepted: 01/25/2024] [Indexed: 03/07/2024]
Abstract
A 5-year-old affected male had following phenotypes: autism, motor stereotypy, developmental regression, staring gaze, absent speech, and behavioral abnormality. The biochemical testing was normal and genetic testing identified a de novo pathogenic variant in ITSN1 gene in the proband. To our knowledge, this is the second report that elucidates the role of ITSN1 gene in an autosomal dominant neurodevelopmental disorder.
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Affiliation(s)
- Khurram Liaqat
- Department of Medical and Molecular Genetics, Undiagnosed Rare Disease Clinic (URDC), Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Kayla Treat
- Department of Medical and Molecular Genetics, Undiagnosed Rare Disease Clinic (URDC), Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Theodore E Wilson
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Erin Conboy
- Department of Medical and Molecular Genetics, Undiagnosed Rare Disease Clinic (URDC), Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Francesco Vetrini
- Department of Medical and Molecular Genetics, Undiagnosed Rare Disease Clinic (URDC), Indiana University School of Medicine, Indianapolis, Indiana, USA
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2
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Mintoo M, Rajagopalan V, O'Bryan JP. Intersectin - many facets of a scaffold protein. Biochem Soc Trans 2024; 52:1-13. [PMID: 38174740 DOI: 10.1042/bst20211241] [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: 08/15/2023] [Revised: 12/04/2023] [Accepted: 12/18/2023] [Indexed: 01/05/2024]
Abstract
Intersectin (ITSN) is a multi-domain scaffold protein with a diverse array of functions including regulation of endocytosis, vesicle transport, and activation of various signal transduction pathways. There are two ITSN genes located on chromosomes 21 and 2 encoding for proteins ITSN1 and ITSN2, respectively. Each ITSN gene encodes two major isoforms, ITSN-Long (ITSN-L) and ITSN-Short (ITSN-S), due to alternative splicing. ITSN1 and 2, collectively referred to as ITSN, are implicated in many physiological and pathological processes, such as neuronal maintenance, actin cytoskeletal rearrangement, and tumor progression. ITSN is mis-regulated in many tumors, such as breast, lung, neuroblastomas, and gliomas. Altered expression of ITSN is also found in several neurodegenerative diseases, such as Down Syndrome and Alzheimer's disease. This review summarizes recent studies on ITSN and provides an overview of the function of this important family of scaffold proteins in various biological processes.
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Affiliation(s)
- Mubashir Mintoo
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, U.S.A
| | - Vinodh Rajagopalan
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, U.S.A
| | - John P O'Bryan
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, U.S.A
- Ralph H. Johnson VA Medical Center, Charleston, SC 29401, U.S.A
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3
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Edwards NA, Kashyap A, Warren A, Agricola ZN, Kenny AP, Shen Y, Chung WK, Zorn AM. Disrupted endosomal trafficking of the Vangl-Celsr polarity complex underlies congenital anomalies in trachea-esophageal morphogenesis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.10.11.561909. [PMID: 37873300 PMCID: PMC10592723 DOI: 10.1101/2023.10.11.561909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
Disruptions in foregut morphogenesis can result in life-threatening conditions where the trachea and esophagus fail to separate properly, such as esophageal atresia (EA) and tracheoesophageal fistulas (TEF). The developmental basis of these congenital anomalies is poorly understood, but recent genome sequencing reveals that de novo variants in intracellular trafficking genes are enriched in EA/TEF patients. Here we show that mutation of orthologous genes in Xenopus disrupts trachea-esophageal separation similar to EA/TEF patients. We show that the Rab11a recycling endosome pathway is required to localize Vangl-Celsr polarity complexes at the cell surface where opposite sides of the common foregut tube fuse. Partial loss of endosome trafficking or the Vangl/Celsr complex disrupts epithelial polarity and cell division orientation. Mutant cells accumulate at the fusion point, fail to downregulate cadherin, and do not separate into distinct trachea and esophagus. These data provide new insights into the mechanisms of congenital anomalies and general paradigms of tissue fusion during organogenesis.
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4
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Zhong G, Ahimaz P, Edwards NA, Hagen JJ, Faure C, Lu Q, Kingma P, Middlesworth W, Khlevner J, El Fiky M, Schindel D, Fialkowski E, Kashyap A, Forlenza S, Kenny AP, Zorn AM, Shen Y, Chung WK. Identification and validation of candidate risk genes in endocytic vesicular trafficking associated with esophageal atresia and tracheoesophageal fistulas. HGG ADVANCES 2022; 3:100107. [PMID: 35519826 PMCID: PMC9065433 DOI: 10.1016/j.xhgg.2022.100107] [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: 08/24/2021] [Accepted: 04/06/2022] [Indexed: 11/15/2022] Open
Abstract
Esophageal atresias/tracheoesophageal fistulas (EA/TEF) are rare congenital anomalies caused by aberrant development of the foregut. Previous studies indicate that rare or de novo genetic variants significantly contribute to EA/TEF risk, and most individuals with EA/TEF do not have pathogenic genetic variants in established risk genes. To identify the genetic contributions to EA/TEF, we performed whole genome sequencing of 185 trios (probands and parents) with EA/TEF, including 59 isolated and 126 complex cases with additional congenital anomalies and/or neurodevelopmental disorders. There was a significant burden of protein-altering de novo coding variants in complex cases (p = 3.3 × 10-4), especially in genes that are intolerant of loss-of-function variants in the population. We performed simulation analysis of pathway enrichment based on background mutation rate and identified a number of pathways related to endocytosis and intracellular trafficking that as a group have a significant burden of protein-altering de novo variants. We assessed 18 variants for disease causality using CRISPR-Cas9 mutagenesis in Xenopus and confirmed 13 with tracheoesophageal phenotypes. Our results implicate disruption of endosome-mediated epithelial remodeling as a potential mechanism of foregut developmental defects. Our results suggest significant genetic heterogeneity of EA/TEF and may have implications for the mechanisms of other rare congenital anomalies.
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Affiliation(s)
- Guojie Zhong
- Department of Systems Biology, Columbia University Irving Medical Center, New York, NY, USA
- Integrated Program in Cellular, Molecular, and Biomedical Studies, Columbia University, New York, NY, USA
| | - Priyanka Ahimaz
- Department of Pediatrics, Columbia University Irving Medical Center, New York, NY, USA
| | - Nicole A. Edwards
- Center for Stem Cell & Organoid Medicine (CuSTOM), Division of Developmental Biology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati, College of Medicine, Cincinnati, OH, USA
| | - Jacob J. Hagen
- Department of Systems Biology, Columbia University Irving Medical Center, New York, NY, USA
- Department of Pediatrics, Columbia University Irving Medical Center, New York, NY, USA
| | - Christophe Faure
- Division of Pediatric Gastroenterology, CHU Sainte-Justine, Montreal, QC, Canada
| | - Qiao Lu
- Department of Systems Biology, Columbia University Irving Medical Center, New York, NY, USA
- Department of Pediatrics, Columbia University Irving Medical Center, New York, NY, USA
| | - Paul Kingma
- Division of Neonatology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - William Middlesworth
- Division of Pediatric Surgery, Columbia University Irving Medical Center, New York, NY, USA
| | - Julie Khlevner
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Columbia University Irving Medical Center, New York, NY, USA
| | - Mahmoud El Fiky
- Pediatric Surgery, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - David Schindel
- Division of Pediatric Surgery, UT Southwestern School of Medicine Dallas, Texas, USA
| | - Elizabeth Fialkowski
- Division of Pediatric Surgery, Oregon Health and Science University, Portland, OR, USA
| | - Adhish Kashyap
- Center for Stem Cell & Organoid Medicine (CuSTOM), Division of Developmental Biology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati, College of Medicine, Cincinnati, OH, USA
| | - Sophia Forlenza
- Division of Neonatology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
- Division of Pulmonary Biology, Cincinnati Children’s Hospital Medical Center, University of Cincinnati, Cincinnati, OH, USA
| | - Alan P. Kenny
- Division of Neonatology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
- Division of Pulmonary Biology, Cincinnati Children’s Hospital Medical Center, University of Cincinnati, Cincinnati, OH, USA
| | - Aaron M. Zorn
- Center for Stem Cell & Organoid Medicine (CuSTOM), Division of Developmental Biology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati, College of Medicine, Cincinnati, OH, USA
| | - Yufeng Shen
- Department of Systems Biology, Columbia University Irving Medical Center, New York, NY, USA
- Department of Biomedical Informatics, Columbia University Irving Medical Center, New York, NY, USA
| | - Wendy K. Chung
- Department of Pediatrics, Columbia University Irving Medical Center, New York, NY, USA
- Department of Medicine, Columbia University Irving Medical Center, New York, NY, USA
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5
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Bruel AL, Vitobello A, Thiffault I, Manwaring L, Willing M, Agrawal PB, Bayat A, Kitzler TM, Brownstein CA, Genetti CA, Gonzalez-Heydrich J, Jayakar P, Zyskind JW, Zhu Z, Vachet C, Wilson GR, Pruniski B, Goyette AM, Duffourd Y, Thauvin-Robinet C, Philippe C, Faivre L. ITSN1: a novel candidate gene involved in autosomal dominant neurodevelopmental disorder spectrum. Eur J Hum Genet 2022; 30:111-116. [PMID: 34707297 PMCID: PMC8738743 DOI: 10.1038/s41431-021-00985-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 09/21/2021] [Accepted: 10/05/2021] [Indexed: 01/03/2023] Open
Abstract
ITSN1 plays an important role in brain development. Recent studies in large cohorts of subjects with neurodevelopmental disorders have identified de novo variants in ITSN1 gene thereby suggesting that this gene is involved in the development of such disorders. The aim of this study is to provide further proof of such a link. We performed trio exome sequencing in a patient presenting autism, intellectual disability, and severe behavioral difficulties. Additional affected patients with a neurodevelopmental disorder harboring a heterozygous variant in ITSN1 (NM_003024.2) were collected through a worldwide collaboration. All patients underwent detailed phenotypic and genetic assessment and data was collected and shared by healthcare givers. We identified ten novel patients from eight families with heterozygous truncating or missense variants in ITSN1 gene. In addition, four previously published patients from large meta-analysis studies were included. In total, 7/14 patients presented a de novo variant in ITSN1. All patients showed neurodevelopmental disorders from autism spectrum disorders (90%), intellectual disability (86%), and epilepsy (30%). We demonstrated that truncating variants are in the first half of ITSN1 whereas missense variants are clustered in C-terminal region. We suggest ITSN1 gene is involved in development of an autism spectrum disorder with variable additional neurodevelopmental deficiency, thus confirming the hypothesis that ITSN1 is important for brain development.
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Affiliation(s)
- Ange-Line Bruel
- grid.493090.70000 0004 4910 6615UMR1231 GAD, Inserm - Université Bourgogne-Franche Comté, Dijon, France ,grid.31151.37Unité Fonctionnelle Innovation en Diagnostic génomique des maladies rares, FHU-TRANSLAD, CHU Dijon Bourgogne, Dijon, France
| | - Antonio Vitobello
- grid.493090.70000 0004 4910 6615UMR1231 GAD, Inserm - Université Bourgogne-Franche Comté, Dijon, France ,grid.31151.37Unité Fonctionnelle Innovation en Diagnostic génomique des maladies rares, FHU-TRANSLAD, CHU Dijon Bourgogne, Dijon, France
| | - Isabelle Thiffault
- grid.239559.10000 0004 0415 5050Center for Pediatric Genomic Medicine, Children’s Mercy Hospital, Kansas City, MO USA
| | - Linda Manwaring
- grid.4367.60000 0001 2355 7002Department of Pediatrics, Division of Genetics and Genomic Medicine, Washington University School of Medicine, St. Louis, MO USA
| | - Marcia Willing
- grid.4367.60000 0001 2355 7002Department of Pediatrics, Division of Genetics and Genomic Medicine, Washington University School of Medicine, St. Louis, MO USA
| | - Pankaj B. Agrawal
- grid.2515.30000 0004 0378 8438Divisions of Newborn Medicine, Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA USA ,grid.38142.3c000000041936754XDepartment of Pediatrics, Harvard Medical School, Boston, MA USA
| | - Allan Bayat
- grid.452376.1Department of Genetics and Precision Medicine, Danish Epilepsy Centre, Dianalund, Denmark
| | - Thomas M. Kitzler
- grid.63984.300000 0000 9064 4811Research Institute, McGill University Health Centre, Montreal, QC Canada ,grid.63984.300000 0000 9064 4811Division of Medical Genetics, Department of Medicine, McGill University Health Centre, Montreal, QC Canada ,grid.14709.3b0000 0004 1936 8649Department of Human Genetics, McGill University, Montreal, QC Canada
| | - Catherine A. Brownstein
- grid.2515.30000 0004 0378 8438Divisions of Newborn Medicine, Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA USA
| | - Casie A. Genetti
- grid.2515.30000 0004 0378 8438Divisions of Newborn Medicine, Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children’s Hospital, Boston, MA USA
| | - Joseph Gonzalez-Heydrich
- grid.2515.30000 0004 0378 8438Department of Psychiatry, Boston Children’s Hospital, Manton Center for Orphan Disease Research, Division of Genetics and Genomics, Boston Children’s Hospital, Department of Pediatrics, Harvard Medical School, Boston, MA USA
| | - Parul Jayakar
- grid.415486.a0000 0000 9682 6720Division of Genetics and Metabolism, Nicklaus Children’s Hospital, Miami, FL USA
| | | | - Zehua Zhu
- grid.428467.b0000 0004 0409 2707GeneDX, Gaitherburg, MD USA
| | - Clemence Vachet
- grid.411158.80000 0004 0638 9213Service de néphrologie pédiatrique, Centre Hospitalier Régional Universitaire Besançon, Besançon, France
| | - Gena R. Wilson
- Division of Genetics and Metabolism, Phoenix Children’s Medical Group, Phoenix, AZ USA
| | - Brianna Pruniski
- Division of Genetics and Metabolism, Phoenix Children’s Medical Group, Phoenix, AZ USA
| | - Anne-Marie Goyette
- FRCPC, Developmental Pediatrician, Montreal Children’s Hospital, McGill University Health Center, Montreal, QC Canada
| | - Yannis Duffourd
- grid.493090.70000 0004 4910 6615UMR1231 GAD, Inserm - Université Bourgogne-Franche Comté, Dijon, France ,grid.31151.37Unité Fonctionnelle Innovation en Diagnostic génomique des maladies rares, FHU-TRANSLAD, CHU Dijon Bourgogne, Dijon, France
| | - Christel Thauvin-Robinet
- grid.493090.70000 0004 4910 6615UMR1231 GAD, Inserm - Université Bourgogne-Franche Comté, Dijon, France ,grid.31151.37Unité Fonctionnelle Innovation en Diagnostic génomique des maladies rares, FHU-TRANSLAD, CHU Dijon Bourgogne, Dijon, France ,grid.31151.37Fédération Hospitalo-Universitaire Médecine Translationnelle et Anomalies du Développement (TRANSLAD), Centre Hospitalier Universitaire Dijon, Dijon, France
| | - Christophe Philippe
- grid.493090.70000 0004 4910 6615UMR1231 GAD, Inserm - Université Bourgogne-Franche Comté, Dijon, France ,grid.31151.37Unité Fonctionnelle Innovation en Diagnostic génomique des maladies rares, FHU-TRANSLAD, CHU Dijon Bourgogne, Dijon, France ,grid.31151.37Fédération Hospitalo-Universitaire Médecine Translationnelle et Anomalies du Développement (TRANSLAD), Centre Hospitalier Universitaire Dijon, Dijon, France
| | - Laurence Faivre
- grid.493090.70000 0004 4910 6615UMR1231 GAD, Inserm - Université Bourgogne-Franche Comté, Dijon, France ,grid.31151.37Unité Fonctionnelle Innovation en Diagnostic génomique des maladies rares, FHU-TRANSLAD, CHU Dijon Bourgogne, Dijon, France ,grid.31151.37Fédération Hospitalo-Universitaire Médecine Translationnelle et Anomalies du Développement (TRANSLAD), Centre Hospitalier Universitaire Dijon, Dijon, France
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6
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Gerasymchuk D, Hubiernatorova A, Domanskyi A. MicroRNAs Regulating Cytoskeleton Dynamics, Endocytosis, and Cell Motility-A Link Between Neurodegeneration and Cancer? Front Neurol 2020; 11:549006. [PMID: 33240194 PMCID: PMC7680873 DOI: 10.3389/fneur.2020.549006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Accepted: 10/06/2020] [Indexed: 12/13/2022] Open
Abstract
The cytoskeleton is one of the most mobile and complex cell structures. It is involved in cellular transport, cell division, cell shape formation and adaptation in response to extra- and intracellular stimuli, endo- and exocytosis, migration, and invasion. These processes are crucial for normal cellular physiology and are affected in several pathological processes, including neurodegenerative diseases, and cancer. Some proteins, participating in clathrin-mediated endocytosis (CME), play an important role in actin cytoskeleton reorganization, and formation of invadopodia in cancer cells and are also deregulated in neurodegenerative disorders. However, there is still limited information about the factors contributing to the regulation of their expression. MicroRNAs are potent negative regulators of gene expression mediating crosstalk between different cellular pathways in cellular homeostasis and stress responses. These molecules regulate numerous genes involved in neuronal differentiation, plasticity, and degeneration. Growing evidence suggests the role of microRNAs in the regulation of endocytosis, cell motility, and invasiveness. By modulating the levels of such microRNAs, it may be possible to interfere with CME or other processes to normalize their function. In malignancy, the role of microRNAs is undoubtful, and therefore changing their levels can attenuate the carcinogenic process. Here we review the current advances in our understanding of microRNAs regulating actin cytoskeleton dynamics, CME and cell motility with a special focus on neurodegenerative diseases, and cancer. We investigate whether current literature provides an evidence that microRNA-mediated regulation of essential cellular processes, such as CME and cell motility, is conserved in neurons, and cancer cells. We argue that more research effort should be addressed to study the neuron-specific functions on microRNAs. Disease-associated microRNAs affecting essential cellular processes deserve special attention both from the view of fundamental science and as future neurorestorative or anti-cancer therapies.
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Affiliation(s)
- Dmytro Gerasymchuk
- Institute of Biotechnology, Helsinki Institute of Life Science (HiLIFE), University of Helsinki, Helsinki, Finland
- Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine
| | | | - Andrii Domanskyi
- Institute of Biotechnology, Helsinki Institute of Life Science (HiLIFE), University of Helsinki, Helsinki, Finland
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7
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Gubar O, Croisé P, Kropyvko S, Gryaznova T, Tóth P, Blangy A, Vitale N, Rynditch A, Gasman S, Ory S. The atypical Rho GTPase RhoU interacts with intersectin-2 to regulate endosomal recycling pathways. J Cell Sci 2020; 133:jcs234104. [PMID: 32737221 DOI: 10.1242/jcs.234104] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 07/21/2020] [Indexed: 01/22/2023] Open
Abstract
Rho GTPases play a key role in various membrane trafficking processes. RhoU is an atypical small Rho GTPase related to Rac/Cdc42, which possesses unique N- and C-terminal domains that regulate its function and its subcellular localization. RhoU localizes at the plasma membrane, on endosomes and in cell adhesion structures where it governs cell signaling, differentiation and migration. However, despite its endomembrane localization, RhoU function in vesicular trafficking has been unexplored. Here, we identified intersectins (ITSNs) as new binding partners for RhoU and showed that the second PxxP motif at the N terminus of RhoU mediated interactions with the SH3 domains of ITSNs. To evaluate the function of RhoU and ITSNs in vesicular trafficking, we used fluorescent transferrin as a cargo for uptake experiments. We showed that silencing of either RhoU or ITSN2, but not ITSN1, increased transferrin accumulation in early endosomes, resulting from a defect in fast vesicle recycling. Concomitantly, RhoU and ITSN2 colocalized to a subset of Rab4-positive vesicles, suggesting that a RhoU-ITSN2 interaction may occur on fast recycling endosomes to regulate the fate of vesicular cargos.
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Affiliation(s)
- Olga Gubar
- Centre National de la Recherche Scientifique, Université de Strasbourg, Institut des Neurosciences Cellulaires et Intégratives, F-67000 Strasbourg, France
- Institute of Molecular Biology and Genetics NASU, 150 Zabolotnogo Street, Kyiv 03680, Ukraine
| | - Pauline Croisé
- Centre National de la Recherche Scientifique, Université de Strasbourg, Institut des Neurosciences Cellulaires et Intégratives, F-67000 Strasbourg, France
| | - Sergii Kropyvko
- Institute of Molecular Biology and Genetics NASU, 150 Zabolotnogo Street, Kyiv 03680, Ukraine
| | - Tetyana Gryaznova
- Institute of Molecular Biology and Genetics NASU, 150 Zabolotnogo Street, Kyiv 03680, Ukraine
| | - Petra Tóth
- Centre National de la Recherche Scientifique, Université de Strasbourg, Institut des Neurosciences Cellulaires et Intégratives, F-67000 Strasbourg, France
| | - Anne Blangy
- Centre de Recherche en Biologie Cellulaire de Montpellier (CRBM), Univ. Montpellier, CNRS, 34000 Montpellier, France
| | - Nicolas Vitale
- Centre National de la Recherche Scientifique, Université de Strasbourg, Institut des Neurosciences Cellulaires et Intégratives, F-67000 Strasbourg, France
| | - Alla Rynditch
- Institute of Molecular Biology and Genetics NASU, 150 Zabolotnogo Street, Kyiv 03680, Ukraine
| | - Stéphane Gasman
- Centre National de la Recherche Scientifique, Université de Strasbourg, Institut des Neurosciences Cellulaires et Intégratives, F-67000 Strasbourg, France
| | - Stéphane Ory
- Centre National de la Recherche Scientifique, Université de Strasbourg, Institut des Neurosciences Cellulaires et Intégratives, F-67000 Strasbourg, France
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8
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Sokolik CG, Qassem N, Chill JH. The Disordered Cellular Multi-Tasker WIP and Its Protein-Protein Interactions: A Structural View. Biomolecules 2020; 10:biom10071084. [PMID: 32708183 PMCID: PMC7407642 DOI: 10.3390/biom10071084] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/16/2020] [Accepted: 07/18/2020] [Indexed: 01/21/2023] Open
Abstract
WASp-interacting protein (WIP), a regulator of actin cytoskeleton assembly and remodeling, is a cellular multi-tasker and a key member of a network of protein-protein interactions, with significant impact on health and disease. Here, we attempt to complement the well-established understanding of WIP function from cell biology studies, summarized in several reviews, with a structural description of WIP interactions, highlighting works that present a molecular view of WIP's protein-protein interactions. This provides a deeper understanding of the mechanisms by which WIP mediates its biological functions. The fully disordered WIP also serves as an intriguing example of how intrinsically disordered proteins (IDPs) exert their function. WIP consists of consecutive small functional domains and motifs that interact with a host of cellular partners, with a striking preponderance of proline-rich motif capable of interactions with several well-recognized binding partners; indeed, over 30% of the WIP primary structure are proline residues. We focus on the binding motifs and binding interfaces of three important WIP segments, the actin-binding N-terminal domain, the central domain that binds SH3 domains of various interaction partners, and the WASp-binding C-terminal domain. Beyond the obvious importance of a more fundamental understanding of the biology of this central cellular player, this approach carries an immediate and highly beneficial effect on drug-design efforts targeting WIP and its binding partners. These factors make the value of such structural studies, challenging as they are, readily apparent.
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9
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Xie C, Xiong W, Li J, Wang X, Xu C, Yang L. Intersectin 1 (ITSN1) identified by comprehensive bioinformatic analysis and experimental validation as a key candidate biological target in breast cancer. Onco Targets Ther 2019; 12:7079-7093. [PMID: 31564893 PMCID: PMC6722439 DOI: 10.2147/ott.s216286] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Accepted: 08/09/2019] [Indexed: 12/28/2022] Open
Abstract
Background As one of the most common cancers, breast carcinoma is the most common disease in women. Intersectin 1 (ITSN1) contributes to the actin cytoskeleton reconstruction in breast cancer. Purpose The objective of this study to explore the functions of ITSN1 in breast carcinoma. Methods We downloaded microarray datasets GSE8087, GSE50697, and GSE98238 from the Gene Expression Omnibus database. Differentially expressed genes (DEGs) were used to construct a protein–protein interaction (PPI) network using STRING database, and the modules from PPI network were verified by Cytoscape software. Gene ontology terms and Kyoto Encyclopedia of Gene and Genome pathway were used to analyze the biological functions using the DAVID database. ONCOMINE, GEPIA, UALCAN, and Human Protein Atlas databases were used to investigate the characteristics of ITSN1 for the prognosis of breast carcinoma. Cell counting kit-8, flow cytometry, and colony formation assays were used to detect cell viability, cell apoptosis, and cell proliferation. RT-PCR and Western blot assays were used to detect ITSN1, Ki67, and cleaved caspase-3 expressions. Results Low expressions of ITSN1 were significantly associated with clinical cancer stages. RT-PCR and Western blot analysis showed low expression of ITSN1 in breast cancer tissues and cell lines. ITSN1 inhibition could promote cell proliferation and inhibit cell apoptosis, while ITSN1 overexpression could inhibit cell proliferation and increase cell apoptosis by regulating the levels of expression of Ki67 and cleaved-caspase-3. Conclusion The results indicated that ITSN1 could be a prognostic biomarker for survivals of breast cancer patients.
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Affiliation(s)
- Chen Xie
- Department of Radiotherapy, Jiangxi Cancer Hospital, NanChang City, Jiangxi Province 330029, People's Republic of China
| | - Wenmin Xiong
- Department of Radiotherapy, Jiangxi Cancer Hospital, NanChang City, Jiangxi Province 330029, People's Republic of China
| | - Junyu Li
- Department of Radiotherapy, Jiangxi Cancer Hospital, NanChang City, Jiangxi Province 330029, People's Republic of China
| | - Xia Wang
- Department of Radiotherapy, Jiangxi Cancer Hospital, NanChang City, Jiangxi Province 330029, People's Republic of China
| | - Chen Xu
- Department of Radiotherapy, Jiangxi Cancer Hospital, NanChang City, Jiangxi Province 330029, People's Republic of China
| | - Liping Yang
- Department of Breast Tumor Surgery, Jiangxi Cancer Hospital, NanChang City, Jiangxi Province 330029, People's Republic of China
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Feliciano P, Zhou X, Astrovskaya I, Turner TN, Wang T, Brueggeman L, Barnard R, Hsieh A, Snyder LG, Muzny DM, Sabo A, Gibbs RA, Eichler EE, O’Roak BJ, Michaelson JJ, Volfovsky N, Shen Y, Chung WK. Exome sequencing of 457 autism families recruited online provides evidence for autism risk genes. NPJ Genom Med 2019; 4:19. [PMID: 31452935 PMCID: PMC6707204 DOI: 10.1038/s41525-019-0093-8] [Citation(s) in RCA: 131] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 07/11/2019] [Indexed: 12/30/2022] Open
Abstract
Autism spectrum disorder (ASD) is a genetically heterogeneous condition, caused by a combination of rare de novo and inherited variants as well as common variants in at least several hundred genes. However, significantly larger sample sizes are needed to identify the complete set of genetic risk factors. We conducted a pilot study for SPARK (SPARKForAutism.org) of 457 families with ASD, all consented online. Whole exome sequencing (WES) and genotyping data were generated for each family using DNA from saliva. We identified variants in genes and loci that are clinically recognized causes or significant contributors to ASD in 10.4% of families without previous genetic findings. In addition, we identified variants that are possibly associated with ASD in an additional 3.4% of families. A meta-analysis using the TADA framework at a false discovery rate (FDR) of 0.1 provides statistical support for 26 ASD risk genes. While most of these genes are already known ASD risk genes, BRSK2 has the strongest statistical support and reaches genome-wide significance as a risk gene for ASD (p-value = 2.3e-06). Future studies leveraging the thousands of individuals with ASD who have enrolled in SPARK are likely to further clarify the genetic risk factors associated with ASD as well as allow accelerate ASD research that incorporates genetic etiology.
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Affiliation(s)
| | - Xueya Zhou
- Department of Systems Biology, Columbia University, New York, NY 10032 USA
| | | | - Tychele N. Turner
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, WA 98195 USA
| | - Tianyun Wang
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, WA 98195 USA
| | - Leo Brueggeman
- Department of Psychiatry, University of Iowa Carver College of Medicine, Iowa City, IA 52242 USA
| | - Rebecca Barnard
- Department of Molecular and Medical Genetics, Oregon Health & Science University, Portland, OR 97239 USA
| | - Alexander Hsieh
- Department of Systems Biology, Columbia University, New York, NY 10032 USA
| | | | - Donna M. Muzny
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX 77030 USA
| | - Aniko Sabo
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX 77030 USA
| | - Richard A. Gibbs
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX 77030 USA
| | - Evan E. Eichler
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, WA 98195 USA
- Howard Hughes Medical Institute, University of Washington, Seattle, WA 98195 USA
| | - Brian J. O’Roak
- Department of Molecular and Medical Genetics, Oregon Health & Science University, Portland, OR 97239 USA
| | - Jacob J. Michaelson
- Department of Psychiatry, University of Iowa Carver College of Medicine, Iowa City, IA 52242 USA
| | | | - Yufeng Shen
- Department of Systems Biology, Columbia University, New York, NY 10032 USA
| | - Wendy K. Chung
- Simons Foundation, New York, NY 10010 USA
- Department of Pediatrics, Columbia University Medical Center, New York, NY 10032 USA
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Shi X, Duan F, Lin L, Xu Q, Xu T, Zhang R. WIP-1 and DBN-1 promote scission of endocytic vesicles by bridging actin and Dynamin-1 in the C. elegans intestine. J Cell Sci 2019; 132:jcs.228023. [PMID: 31118234 DOI: 10.1242/jcs.228023] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 05/13/2019] [Indexed: 01/13/2023] Open
Abstract
There has been a consensus that actin plays an important role in scission of the clathrin-coated pits (CCPs) together with large GTPases of the dynamin family in metazoan cells. However, the recruitment, regulation and functional interdependence of actin and dynamin during this process remain inadequately understood. Here, based on small-scale screening and in vivo live-imaging techniques, we identified a novel set of molecules underlying CCP scission in the multicellular organism Caenorhabditis elegans We found that loss of Wiskott-Aldrich syndrome protein (WASP)-interacting protein (WIP-1) impaired CCP scission in a manner that is independent of the C. elegans homolog of WASP/N-WASP (WSP-1) and is mediated by direct binding to G-actin. Moreover, the cortactin-binding domain of WIP-1 serves as the binding interface for DBN-1 (also known in other organisms as Abp1), another actin-binding protein. We demonstrate that the interaction between DBN-1 and F-actin is essential for Dynamin-1 (DYN-1) recruitment at endocytic sites. In addition, the recycling regulator RME-1, a homolog of mammalian Eps15 homology (EH) domain-containing proteins, is increasingly recruited at the arrested endocytic intermediates induced by F-actin loss or DYN-1 inactivation, which further stabilizes the tubular endocytic intermediates. Our study provides new insights into the molecular network underlying F-actin participation in the scission of CCPs.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Xuemeng Shi
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Fengyun Duan
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Long Lin
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Qifeng Xu
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Tao Xu
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China .,National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Rongying Zhang
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
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