keyword
MENU ▼
Read by QxMD icon Read
search

virus cell entry

keyword
https://www.readbyqxmd.com/read/29778184/interaction-of-prrs-virus-with-bone-marrow-monocyte-subsets
#1
Teresa Fernández-Caballero, Belén Álvarez, Fernando Alonso, Concepción Revilla, Javier Martínez-Lobo, Cinta Prieto, Ángel Ezquerra, Javier Domínguez
PRRSV can replicate for months in lymphoid organs leading to persistent host infections. Porcine bone marrow comprises two major monocyte subsets, one of which expresses CD163 and CD169, two receptors involved in the entry of PRRSV in macrophages. In this study, we investigate the permissiveness of these subsets to PRRSV infection. PRRSV replicates efficiently in BM CD163+ monocytes reaching titers similar to those obtained in alveolar macrophages, but with a delayed kinetics. Infection of BM CD163- monocytes was variable and yielded lower titers...
June 2018: Veterinary Microbiology
https://www.readbyqxmd.com/read/29777397/telomeres-and-telomerase-during-human-papillomavirus-induced-carcinogenesis
#2
REVIEW
Anna Pańczyszyn, Ewa Boniewska-Bernacka, Grzegorz Głąb
Human papillomaviruses (HPVs) belong to a small spherical virus family and are transmitted through direct contact, most often through sexual behavior. More than 200 types of HPV are known, a dozen or so of which are classified as high-risk viruses (HR HPV) and may contribute to the development of cervical cancer. HPV is a small virus with a capsid composed of L1 and L2 proteins, which are crucial for entry to the cell. The infection begins at the basal cell layer and progresses to involve cells from higher layers of the cervical epithelium...
May 18, 2018: Molecular Diagnosis & Therapy
https://www.readbyqxmd.com/read/29772704/lateral-membrane-heterogeneity-regulates-viral-induced-membrane-fusion-during-hiv-entry
#3
Rodion J Molotkovsky, Veronika V Alexandrova, Timur R Galimzyanov, Irene Jiménez-Munguía, Konstantin V Pavlov, Oleg V Batishchev, Sergey A Akimov
Sphingomyelin- and cholesterol- enriched membrane domains, commonly referred to as "rafts" play a crucial role in a large number of intra- and intercellular processes. Recent experiments suggest that not only the volumetric inhomogeneity of lipid distribution in rafts, but also the arrangement of the 1D boundary between the raft and the surrounding membrane is important for the membrane-associated processes. The reason is that the boundary preferentially recruits different peptides, such as HIV (human immunodeficiency virus) fusion peptide...
May 16, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29769725/mxra8-is-a-receptor-for-multiple-arthritogenic-alphaviruses
#4
Rong Zhang, Arthur S Kim, Julie M Fox, Sharmila Nair, Katherine Basore, William B Klimstra, Rebecca Rimkunas, Rachel H Fong, Hueylie Lin, Subhajit Poddar, James E Crowe, Benjamin J Doranz, Daved H Fremont, Michael S Diamond
Arthritogenic alphaviruses comprise a group of enveloped RNA viruses that are transmitted to humans by mosquitoes and cause debilitating acute and chronic musculoskeletal disease 1 . The host factors required for alphavirus entry remain poorly characterized 2 . Here we use a genome-wide CRISPR-Cas9-based screen to identify the cell adhesion molecule Mxra8 as an entry mediator for multiple emerging arthritogenic alphaviruses, including chikungunya, Ross River, Mayaro and O'nyong nyong viruses. Gene editing of mouse Mxra8 or human MXRA8 resulted in reduced levels of viral infection of cells and, reciprocally, ectopic expression of these genes resulted in increased infection...
May 16, 2018: Nature
https://www.readbyqxmd.com/read/29769350/rab5-rab7-and-rab11-are-required-for-caveolae-dependent-endocytosis-of-classic-swine-fever-virus-in-porcine-alveolar-macrophages
#5
Yun-Na Zhang, Ya-Yun Liu, Fu-Chuan Xiao, Chun-Chun Liu, Xiao-Dong Liang, Jing Chen, Jing Zhou, Abdul Sattar Baloch, Lin Kan, Bin Zhou, Hua-Ji Qiu
The members of Flaviviridae utilize several endocytic pathways to enter a variety of host cells. Our previous work showed that classical swine fever virus (CSFV) enters porcine kidney (PK-15) cells through a clathrin-dependent pathway that requires Rab5 and Rab7. The entry mechanism for CSFV into other cell lines remains unclear, for instance, porcine alveolar macrophages (3D4/21 cells). More importantly, the trafficking of CSFV within endosomes controlled by Rab GTPases is unknown in 3D4/21 cells. In this study, entry and post-internalization of CSFV were analyzed using chemical inhibitors, RNA interference, and dominant negative (DN) mutants...
May 16, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29769341/mutational-analysis-of-the-bovine-hepacivirus-internal-ribosome-entry-site
#6
A L Baron, A Schoeniger, P Becher, C Baechlein
In recent years, hepatitis C virus (HCV)-related viruses were identified in several species including dogs, horses, bats and rodents. Additionally, a novel virus of the genus Hepacivirus has been discovered in bovine samples and was termed bovine hepacivirus (BovHepV). Prediction of the BovHepV IRES (internal ribosome entry site) structure revealed strong similarities to the HCV IRES structure comprising domains II, IIIabcde, pseudoknot IIIf and domain IV with the initiation codon AUG. Unlike HCV, only one microRNA-122 (miR-122) binding site could be identified in the BovHepV 5' NTR...
May 16, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29769337/entry-of-herpes-simplex-virus-1-into-epidermis-and-dermal-fibroblasts-is-independent-of-the-scavenger-receptor-marco
#7
Katharina Thier, Maureen Möckel, Katja Palitzsch, Katinka Döhner, Beate Sodeik, Dagmar Knebel-Mörsdorf
To enter host cells, herpes simplex virus 1 (HSV-1) initially attaches to cell surface glycosaminoglycans followed by requisite binding to one of several cellular receptors leading to viral internalization. Although virus-receptor interactions have been studied in various cell lines, the contributions of individual receptors to uptake into target tissues such as mucosa, skin or cornea are not well understood. We demonstrated that nectin-1 acts as major receptor for HSV-1 entry into murine epidermis, while HVEM can serve as alternative receptor...
May 16, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29769335/bag2-is-a-component-of-a-cytosolic-extraction-machinery-that-promotes-membrane-penetration-of-a-nonenveloped-virus
#8
Allison Dupzyk, Billy Tsai
During entry, the nonenveloped polyomavirus (PyV) SV40 traffics from the cell surface to the endoplasmic reticulum (ER) where it penetrates the ER membrane to reach the cytosol; the virus then transports into the nucleus to cause infection. Although a coherent understanding of SV40's host entry is emerging, how the virus is ejected from the ER into the cytosol remains mysterious. Our previous analyses revealed that the cytosolic Hsc70-SGTA-Hsp105 complex binds to and extracts SV40 from the ER into the cytosol...
May 16, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29765366/evolutionary-analysis-provides-insight-into-the-origin-and-adaptation-of-hcv
#9
Diego Forni, Rachele Cagliani, Chiara Pontremoli, Uberto Pozzoli, Jacopo Vertemara, Luca De Gioia, Mario Clerici, Manuela Sironi
Hepatitis C virus (HCV) belongs to the Hepacivirus genus and is genetically heterogeneous, with seven major genotypes further divided into several recognized subtypes. HCV origin was previously dated in a range between ∼200 and 1000 years ago. Hepaciviruses have been identified in several domestic and wild mammals, the largest viral diversity being observed in bats and rodents. The closest relatives of HCV were found in horses/donkeys (equine hepaciviruses, EHV). However, the origin of HCV as a human pathogen is still an unsolved puzzle...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29760102/broad-receptor-engagement-of-an-emerging-global-coronavirus-may-potentiate-its-diverse-cross-species-transmissibility
#10
Wentao Li, Ruben J G Hulswit, Scott P Kenney, Ivy Widjaja, Kwonil Jung, Moyasar A Alhamo, Brenda van Dieren, Frank J M van Kuppeveld, Linda J Saif, Berend-Jan Bosch
Porcine deltacoronavirus (PDCoV), identified in 2012, is a common enteropathogen of swine with worldwide distribution. The source and evolutionary history of this virus is, however, unknown. PDCoV belongs to the Deltacoronavirus genus that comprises predominantly avian CoV. Phylogenetic analysis suggests that PDCoV originated relatively recently from a host-switching event between birds and mammals. Insight into receptor engagement by PDCoV may shed light into such an exceptional phenomenon. Here we report that PDCoV employs host aminopeptidase N (APN) as an entry receptor and interacts with APN via domain B of its spike (S) protein...
May 14, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29759080/zika-virus-crosses-an-in-vitro-human-blood-brain-barrier-model
#11
Judie B Alimonti, Maria Ribecco-Lutkiewicz, Caroline Sodja, Anna Jezierski, Danica B Stanimirovic, Qing Liu, Arsalan S Haqqani, Wayne Conlan, Mahmud Bani-Yaghoub
Zika virus (ZIKV) is a flavivirus that is highly neurotropic causing congenital abnormalities and neurological damage to the central nervous systems (CNS). In this study, we used a human induced pluripotent stem cell (iPSC)-derived blood brain barrier (BBB) model to demonstrate that ZIKV can infect brain endothelial cells (i-BECs) without compromising the BBB barrier integrity or permeability. Although no disruption to the BBB was observed post-infection, ZIKV particles were released on the abluminal side of the BBB model and infected underlying iPSC-derived neural progenitor cells (i-NPs)...
May 15, 2018: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/29749721/characterization-of-novel-piperidine-based-inhibitor-of-cathepsin-b-dependent-bacterial-toxins-and-viruses
#12
Stella Hartmann, Renae Lopez Cruz, Saleem Alameh, Chi-Lee C Ho, Amy Rabideau, Bradley L Pentelute, Kenneth A Bradley, Mikhail Martchenko
Exploiting the host endocytic trafficking pathway is a common mechanism by which bacterial exotoxins gain entry to exert virulent effects upon the host cells. A previous study identified a small-molecule, 1-(2,6-dimethyl-1-piperidinyl)-3-[(2-isopropyl-5-methylcyclohexyl)oxy]-2-propanol, that blocks the process of anthrax lethal toxin (LT) cytotoxicity. Here, we report the characterization of the bioactivity of this compound, which we named RC1. We found that RC1 protected host cells independently of LT concentration and also blocked intoxication by other bacterial exotoxins, suggesting that the target of the compound is a host factor...
May 18, 2018: ACS Infectious Diseases
https://www.readbyqxmd.com/read/29748487/structural-transition-and-antibody-binding-of-ebov-gp-and-zikv-e-proteins-from-pre-fusion-to-fusion-initiation-state
#13
Anna Lappala, Wataru Nishima, Jacob Miner, Paul Fenimore, Will Fischer, Peter Hraber, Ming Zhang, Benjamin McMahon, Chang-Shung Tung
Membrane fusion proteins are responsible for viral entry into host cells—a crucial first step in viral infection. These proteins undergo large conformational changes from pre-fusion to fusion-initiation structures, and, despite differences in viral genomes and disease etiology, many fusion proteins are arranged as trimers. Structural information for both pre-fusion and fusion-initiation states is critical for understanding virus neutralization by the host immune system. In the case of Ebola virus glycoprotein (EBOV GP) and Zika virus envelope protein (ZIKV E), pre-fusion state structures have been identified experimentally, but only partial structures of fusion-initiation states have been described...
May 10, 2018: Biomolecules
https://www.readbyqxmd.com/read/29746851/glycomics-and-proteomics-approaches-to-investigate-early-adenovirus-host-cell-interactions
#14
REVIEW
Lisa Lasswitz, Naresh Chandra, Niklas Arnberg, Gisa Gerold
Adenoviruses as most viruses rely on glycan and protein interactions to attach to and enter susceptible host cells. The Adenoviridae family comprises more than 80 human types and they differ in their attachment factor and receptor usage, which likely contributes to the diverse tropism of the different types. In the past years methods to systematically identify glycan and protein interactions have advanced. In particular sensitivity, speed and coverage of mass spectrometric analyses allows high-throughput identification of glycans and peptides separated by liquid chromatography...
May 7, 2018: Journal of Molecular Biology
https://www.readbyqxmd.com/read/29746834/characterization-of-bk-polyomaviruses-from-kidney-transplant-recipients-suggests-a-role-for-apobec3-in-driving-in-host-virus-evolution
#15
Alberto Peretti, Eileen M Geoghegan, Diana V Pastrana, Sigrun Smola, Pascal Feld, Marlies Sauter, Stefan Lohse, Mayur Ramesh, Efrem S Lim, David Wang, Cinzia Borgogna, Peter C FitzGerald, Valery Bliskovsky, Gabriel J Starrett, Emily K Law, Reuben S Harris, J Keith Killian, Jack Zhu, Marbin Pineda, Paul S Meltzer, Renzo Boldorini, Marisa Gariglio, Christopher B Buck
BK polyomavirus (BKV) frequently causes nephropathy (BKVN) in kidney transplant recipients (KTRs). BKV has also been implicated in the etiology of bladder and kidney cancers. We characterized BKV variants from two KTRs who developed BKVN followed by renal carcinoma. Both patients showed a swarm of BKV sequence variants encoding non-silent mutations in surface loops of the viral major capsid protein. The temporal appearance and disappearance of these mutations highlights the intra-patient evolution of BKV. Some of the observed mutations conferred resistance to antibody-mediated neutralization...
May 9, 2018: Cell Host & Microbe
https://www.readbyqxmd.com/read/29743363/comparative-characterization-of-the-sindbis-virus-proteome-from-mammalian-and-invertebrate-hosts-identifies-nsp2-as-a-component-of-the-virus-nucleocapsid-and-sorting-nexin-5-as-a-significant-host-factor-for-alphavirus-replication
#16
Ryan Schuchman, Andy Kilianski, Amanda Piper, Ricardo Vancini, José M C Ribeiro, Thomas R Sprague, Farooq Nasar, Gabrielle Boyd, Raquel Hernandez, Trevor Glaros
Recent advances in mass spectrometry methods and instrumentation now allow for more accurate identification of proteins in low abundance. This technology was applied to Sindbis virus, the prototypical alphavirus to investigate the viral proteome. To determine if host proteins are specifically packaged into alphavirus virions, Sindbis virus (SINV) was grown in multiple host cells representing vertebrate and mosquito hosts and total protein content of purified virions was determined. This analysis identified host factors not previously associated with alphavirus entry, replication, or egress...
May 9, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29742434/live-imaging-of-hiv-1-transfer-across-t-cell-virological-synapse-to-epithelial-cells-that-promotes-stromal-macrophage-infection
#17
Fernando Real, Alexis Sennepin, Yonatan Ganor, Alain Schmitt, Morgane Bomsel
During sexual intercourse, HIV-1 crosses epithelial barriers composing the genital mucosa, a poorly understood feature that requires an HIV-1-infected cell vectoring efficient mucosal HIV-1 entry. Therefore, urethral mucosa comprising a polarized epithelium and a stroma composed of fibroblasts and macrophages were reconstructed in vitro. Using this system, we demonstrate by live imaging that efficient HIV-1 transmission to stromal macrophages depends on cell-mediated transfer of the virus through virological synapses formed between HIV-1-infected CD4+ T cells and the epithelial cell mucosal surface...
May 8, 2018: Cell Reports
https://www.readbyqxmd.com/read/29742433/tim-1-ubiquitination-mediates-dengue-virus-entry
#18
Ophélie Dejarnac, Mohamed Lamine Hafirassou, Maxime Chazal, Margaux Versapuech, Julien Gaillard, Manuel Perera-Lecoin, Claudia Umana-Diaz, Lucie Bonnet-Madin, Xavier Carnec, Jean-Yves Tinevez, Constance Delaugerre, Olivier Schwartz, Philippe Roingeard, Nolwenn Jouvenet, Clarisse Berlioz-Torrent, Laurent Meertens, Ali Amara
Dengue virus (DENV) is a major human pathogen causing millions of infections yearly. Despite intensive investigations, a DENV receptor that directly participates in virus internalization has not yet been characterized. Here, we report that the phosphatidylserine receptor TIM-1 is an authentic DENV entry receptor that plays an active role in virus endocytosis. Genetic ablation of TIM-1 strongly impaired DENV infection. Total internal reflection fluorescence microscopy analyses of live infected cells show that TIM-1 is mostly confined in clathrin-coated pits and is co-internalized with DENV during viral entry...
May 8, 2018: Cell Reports
https://www.readbyqxmd.com/read/29742155/the-hsv-1-mechanisms-of-cell-to-cell-spread-and-fusion-are-critically-dependent-on-host-ptp1b
#19
Jillian C Carmichael, Hiroki Yokota, Rebecca C Craven, Anthony Schmitt, John W Wills
All herpesviruses have mechanisms for passing through cell junctions, which exclude neutralizing antibodies and offer a clear path to neighboring, uninfected cells. In the case of herpes simplex virus type 1 (HSV-1), direct cell-to-cell transmission takes place between epithelial cells and sensory neurons, where latency is established. The spreading mechanism is poorly understood, but mutations in four different HSV-1 genes can dysregulate it, causing neighboring cells to fuse to produce syncytia. Because the host proteins involved are largely unknown (other than the virus entry receptor), we were intrigued by an earlier discovery that cells infected with wild-type HSV-1 will form syncytia when treated with salubrinal...
May 9, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29741894/structures-of-ebolavirus-glycoprotein-complexes-with-tricyclic-antidepressant-and-antipsychotic-drugs
#20
Yuguang Zhao, Jingshan Ren, Elizabeth Evelyn Fry, Julia Xiao, Alain R Townsend, David I Stuart
A large number of Food and Drug Administration (FDA) approved drugs have been found to inhibit cell entry of Ebola virus (EBOV). However, since these drugs have various primary pharmacological targets their mechanisms of action against EBOV remain largely unknown. We have previously shown that six FDA approved drugs inhibit EBOV infection by interacting with and destabilizing the viral glycoprotein (GP). Here we show that the antidepressants imipramine and clomipramine, and antipsychotic drug thioridazine also directly interact with EBOV GP, and determine the mode of interaction by crystallographic analysis of the complexes...
May 9, 2018: Journal of Medicinal Chemistry
keyword
keyword
56323
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"