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Buranda T, Gineste C, Wu Y, Bondu V, Perez D, Lake KR, Edwards BS, Sklar LA. A High-Throughput Flow Cytometry Screen Identifies Molecules That Inhibit Hantavirus Cell Entry. SLAS DISCOVERY 2018; 23:634-645. [PMID: 29608398 DOI: 10.1177/2472555218766623] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Hantaviruses cause hemorrhagic fever with renal syndrome (HFRS) and hantavirus cardiopulmonary syndrome (HCPS), which infects more than 200,000 people worldwide. Sin Nombre virus (SNV) and Andes virus (ANDV) cause the most severe form of HCPS, with case fatality ratios of 30%-40%. There are no specific therapies or vaccines for SNV. Using high-throughput flow cytometry, we screened the Prestwick Chemical Library for small-molecule inhibitors of the binding interaction between UV-inactivated and fluorescently labeled SNVR18 particles, and decay-accelerating factor (DAF) expressed on Tanoue B cells. Eight confirmed hit compounds from the primary screen were investigated further in secondary screens that included infection inhibition, cytotoxicity, and probe interference. Antimycin emerged as a bona fide hit compound that inhibited cellular infection of the major HCPS (SNV)- and HCPS (Hantaan)-causing viruses. Confirming our assay's ability to detect active compounds, orthogonal testing of the hit compound showed that antimycin binds directly to the virus particle and blocks recapitulation of physiologic integrin activation caused by SNV binding to the integrin PSI domain.
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Affiliation(s)
- Tione Buranda
- 1 Department of Pathology, University of New Mexico School of Medicine, Albuquerque, NM, USA, and in revised form Feb 15, 2018. Accepted for publication Mar 1, 2018.,2 Center for Infectious Diseases and Immunity, University of New Mexico School of Medicine, Albuquerque, NM, USA
| | - Catherine Gineste
- 3 University of New Mexico Center for Molecular Discovery, University of New Mexico School of Medicine, Albuquerque, NM, USA
| | - Yang Wu
- 1 Department of Pathology, University of New Mexico School of Medicine, Albuquerque, NM, USA, and in revised form Feb 15, 2018. Accepted for publication Mar 1, 2018
| | - Virginie Bondu
- 1 Department of Pathology, University of New Mexico School of Medicine, Albuquerque, NM, USA, and in revised form Feb 15, 2018. Accepted for publication Mar 1, 2018
| | - Dominique Perez
- 1 Department of Pathology, University of New Mexico School of Medicine, Albuquerque, NM, USA, and in revised form Feb 15, 2018. Accepted for publication Mar 1, 2018.,4 Department of Cancer Center, University of New Mexico School of Medicine, Albuquerque, NM, USA
| | - Kaylin R Lake
- 5 Department of Biochemistry, University of New Mexico, Albuquerque, NM, USA
| | - Bruce S Edwards
- 1 Department of Pathology, University of New Mexico School of Medicine, Albuquerque, NM, USA, and in revised form Feb 15, 2018. Accepted for publication Mar 1, 2018.,3 University of New Mexico Center for Molecular Discovery, University of New Mexico School of Medicine, Albuquerque, NM, USA.,4 Department of Cancer Center, University of New Mexico School of Medicine, Albuquerque, NM, USA
| | - Larry A Sklar
- 1 Department of Pathology, University of New Mexico School of Medicine, Albuquerque, NM, USA, and in revised form Feb 15, 2018. Accepted for publication Mar 1, 2018.,3 University of New Mexico Center for Molecular Discovery, University of New Mexico School of Medicine, Albuquerque, NM, USA.,4 Department of Cancer Center, University of New Mexico School of Medicine, Albuquerque, NM, USA
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Clathrin adaptor AP1B controls adenovirus infectivity of epithelial cells. Proc Natl Acad Sci U S A 2009; 106:11143-8. [PMID: 19549835 DOI: 10.1073/pnas.0811227106] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Adenoviruses invading the organism via normal digestive or respiratory routes require the Coxsackie-adenovirus receptor (CAR) to infect the epithelial barrier cells. Because CAR is a component of tight junctions and the basolateral membrane and is normally excluded from the apical membrane, most epithelia are resistant to adenoviruses. However, we discovered that a specialized epithelium, the retinal pigment epithelium (RPE), anomalously expressed CAR at the apical surface and was highly susceptible to adenovirus infection. These properties of RPE cells correlated with the absence of the epithelial-specific clathrin adaptor AP1B. Furthermore, knockdown of this basolateral sorting adaptor in adenovirus-resistant MDCK cells promoted apical localization of CAR and increased dramatically Adenovirus infectivity. Targeting assays showed that AP1B is required for accurate basolateral recycling of CAR after internalization. AP1B knock down MDCK cells missorted CAR from recycling endosomes to the apical surface. In summary, we have characterized the cellular machinery responsible for normal sorting of an adenovirus receptor and illustrated how tissue-specific variations in such machinery result in drastic changes in tissue-susceptibility to adenoviruses.
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Chiba H, Osanai M, Murata M, Kojima T, Sawada N. Transmembrane proteins of tight junctions. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2007; 1778:588-600. [PMID: 17916321 DOI: 10.1016/j.bbamem.2007.08.017] [Citation(s) in RCA: 324] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2007] [Revised: 08/09/2007] [Accepted: 08/16/2007] [Indexed: 12/13/2022]
Abstract
Tight junctions contribute to the paracellular barrier, the fence dividing plasma membranes, and signal transduction, acting as a multifunctional complex in vertebrate epithelial and endothelial cells. The identification and characterization of the transmembrane proteins of tight junctions, claudins, junctional adhesion molecules (JAMs), occludin and tricellulin, have led to insights into the molecular nature of tight junctions. We provide an overview of recent progress in studies on these proteins and highlight their roles and regulation, as well as their functional significance in human diseases.
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Affiliation(s)
- Hideki Chiba
- Department of Pathology, Sapporo Medical University School of Medicine, South-1, West-17, Chuo-ku, Sapporo 060-8556, Japan.
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