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Pathogenesis of viral infection of the lungs

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https://www.readbyqxmd.com/read/28702128/a-novel-host-factor-for-human-respiratory-syncytial-virus
#1
COMMENT
Masfique Mehedi, Peter L Collins, Ursula J Buchholz
Human respiratory syncytial virus (RSV) is the leading viral cause of severe lower respiratory disease in young children worldwide. As part of a genome-wide siRNA screen, we recently discovered that actin-related protein 2 (ARP2) is a host factor in the RSV replication cycle. ARP2 is a major constituent of the ARP2/3 complex, which catalyzes actin polymerization involved in cell morphology and motility. In the course of investigating this finding, we also found that RSV infection of human lung epithelial A459 cells induced filopodia formation and stimulated cell motility...
2017: Communicative & Integrative Biology
https://www.readbyqxmd.com/read/28694795/modulation-of-host-mirnas-transcriptome-in-lung-and-spleen-of-peste-des-petits-ruminants-virus-infected-sheep-and-goats
#2
Aruna Pandey, Amit R Sahu, Sajad A Wani, Shikha Saxena, Sonam Kanchan, Vaishali Sah, Kaushal K Rajak, Alok Khanduri, Aditya P Sahoo, Ashok K Tiwari, Bina Mishra, D Muthuchelvan, Bishnu P Mishra, Raj K Singh, Ravi K Gandham
Peste des petits ruminants (PPR) is one of the highly contagious viral disease, characterized by fever, sore mouth, conjunctivitis, gastroenteritis, and pneumonia, primarily affecting sheep and goats. Reports suggested variable host response in goats and sheep and this host response vis-a-vis the expression of microRNAs (miRNAs) has not been investigated. Here, miRNAs were sequenced and proteomics data were generated to identify the role of differentially expressed miRNA (DEmiRNA) in PPR virus (PPRV) infected lung and spleen tissues of sheep and goats...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28694521/genome-wide-analysis-of-long-noncoding-rna-profiling-in-prrsv-infected-pam-cells-by-rna-sequencing
#3
Jing Zhang, Pu Sun, Lipeng Gan, Weijie Bai, Zhijia Wang, Dong Li, Yimei Cao, Yuanfang Fu, Pinghua Li, Xingwen Bai, Xueqing Ma, Huifang Bao, Yingli Chen, Zaixin Liu, Zengjun Lu
Porcine reproductive and respiratory syndrome (PRRS) is a major threat to the global swine industry and causes tremendous economic losses. Its causative agent, porcine reproductive and respiratory syndrome virus (PRRSV), primarily infects immune cells, such as porcine alveolar macrophages and dendritic cells. PRRSV infection results in immune suppression, antibody-dependent enhancement, and persistent infection. Highly pathogenic strains in China cause high fever and severe inflammatory responses in the lungs...
July 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28659436/broad-spectrum-antiviral-gs-5734-inhibits-both-epidemic-and-zoonotic-coronaviruses
#4
Timothy P Sheahan, Amy C Sims, Rachel L Graham, Vineet D Menachery, Lisa E Gralinski, James B Case, Sarah R Leist, Krzysztof Pyrc, Joy Y Feng, Iva Trantcheva, Roy Bannister, Yeojin Park, Darius Babusis, Michael O Clarke, Richard L Mackman, Jamie E Spahn, Christopher A Palmiotti, Dustin Siegel, Adrian S Ray, Tomas Cihlar, Robert Jordan, Mark R Denison, Ralph S Baric
Emerging viral infections are difficult to control because heterogeneous members periodically cycle in and out of humans and zoonotic hosts, complicating the development of specific antiviral therapies and vaccines. Coronaviruses (CoVs) have a proclivity to spread rapidly into new host species causing severe disease. Severe acute respiratory syndrome CoV (SARS-CoV) and Middle East respiratory syndrome CoV (MERS-CoV) successively emerged, causing severe epidemic respiratory disease in immunologically naïve human populations throughout the globe...
June 28, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28654007/susceptibility-and-lethality-of-western-equine-encephalitis-virus-in-balb-c-mice-when-infected-by-the-aerosol-route
#5
Amanda L Phelps, Lyn M O'Brien, Lin S Eastaugh, Carwyn Davies, Mark S Lever, Jane Ennis, Larry Zeitlin, Alejandro Nunez, David O Ulaeto
Western equine encephalitis virus (WEEV) naturally cycles between mosquitos and birds or rodents, with a case fatality rate of up to 15% in humans during epizootic outbreaks. There are no medical countermeasures to treat WEEV infection, and accidental aerosol exposure increases the case fatality rate up to 40%. Understanding the pathogenesis of infection is required to develop and assess medical countermeasures. This study describes the clinical and pathological findings of mice infected with WEEV by the aerosol route, and use as a model for WEEV infection in humans...
June 27, 2017: Viruses
https://www.readbyqxmd.com/read/28650258/helper-t-cell-responses-to-respiratory-viruses-in-the-lung-development-virus-suppression-and-pathogenesis
#6
Kosuke Miyauchi
The lung is an important line of defense that is exposed to respiratory infectious pathogens, including viruses. Lung epithelial cells and/or alveolar macrophages are initially targeted by respiratory viruses. Once respiratory viruses invade the cells of the lung, innate immunity is activated to inhibit viral replication. Innate immune signaling also activates virus-specific adaptive immune responses. The helper T cells play pivotal roles in the humoral and cellular adaptive immune responses. Helper T cells are categorized into several distinct subsets (e...
July 2017: Viral Immunology
https://www.readbyqxmd.com/read/28637754/functional-evolution-of-influenza-ns1-protein-in-currently-circulating-human-2009-pandemic-h1n1-viruses
#7
Amelia M Clark, Aitor Nogales, Luis Martinez-Sobrido, David J Topham, Marta L DeDiego
In 2009, a novel H1N1 influenza virus emerged in humans, causing a global pandemic. It was previously shown that the NS1 protein from this human 2009 pandemic H1N1 (pH1N1) virus was an effective interferon (IFN) antagonist, but could not inhibit general host gene expression, unlike other NS1 proteins from seasonal human H1N1 and H3N2 viruses. Here, we show that the NS1 protein from currently circulating pH1N1 viruses has evolved to encode 6 amino acid changes (E55K, L90I, I123V, E125D, K131E, and N205S) with respect to the original protein...
June 21, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28575086/lung-epithelial-cells-have-virus-specific-and-shared-gene-expression-responses-to-infection-by-diverse-respiratory-viruses
#8
James T VanLeuven, Benjamin J Ridenhour, Andres J Gonzalez, Craig R Miller, Tanya A Miura
The severity of respiratory viral infections is partially determined by the cellular response mounted by infected lung epithelial cells. Disease prevention and treatment is dependent on our understanding of the shared and unique responses elicited by diverse viruses, yet few studies compare host responses to viruses from different families while controlling other experimental parameters. Murine models are commonly used to study the pathogenesis of respiratory viral infections, and in vitro studies using murine cells provide mechanistic insight into the pathogenesis observed in vivo...
2017: PloS One
https://www.readbyqxmd.com/read/28566378/a-critical-role-for-monocytes-macrophages-in-the-rapid-progression-to-aids-in-pediatric-siv-infected-rhesus-macaques
#9
Chie Sugimoto, Kristen M Merino, Atsuhiko Hasegawa, Xiaolei Wang, Xavier A Alvarez, Hiroshi Wakao, Kazuyasu Mori, Woong-Ki Kim, Ronald S Veazey, Elizabeth S Didier, Marcelo J Kuroda
Infant humans and rhesus macaques infected with the human or simian immunodeficiency virus (HIV, SIV) respectively, express higher viral loads and progress more rapidly to AIDS than infected adults. Activated memory CD4+ T cells in intestinal tissues are major primary target cells for SIV/HIV infection and massive depletion of these cells is considered a major cause of immunodeficiency. Monocytes and macrophages are important cells of innate immunity and also are targets of HIV/SIV infection. We reported previously that high peripheral blood monocyte turnover rate was predictive for the onset of disease progression to AIDS in SIV-infected adult macaques...
May 31, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28566367/heme-oxygenase-1-modulates-human-respiratory-syncytial-virus-replication-and-lung-pathogenesis-during-infection
#10
Janyra A Espinoza, Miguel A León, Pablo F Céspedes, Roberto S Gómez, Gisela Canedo-Marroquín, Sebastían A Riquelme, Francisco J Salazar-Echegarai, Phillipe Blancou, Thomas Simon, Ignacio Anegon, Margarita K Lay, Pablo A González, Claudia A Riedel, Susan M Bueno, Alexis M Kalergis
Human respiratory syncytial virus (hRSV) is the leading cause of severe lower respiratory tract infections in children. The development of novel prophylactic and therapeutic antiviral drugs against hRSV is imperative to control the burden of disease in the susceptible population. In this study, we examined the effects of inducing the activity of the host enzyme heme oxygenase-1 (HO-1) on hRSV replication and pathogenesis on lung inflammation induced by this virus. Our results show that after hRSV infection, HO-1 induction with metalloporphyrin cobalt protoporphyrin IX significantly reduces the loss of body weight due to hRSV-induced disease...
May 31, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28553293/a-role-for-neutrophils-in-viral-respiratory-disease
#11
REVIEW
Jeremy V Camp, Colleen B Jonsson
Neutrophils are immune cells that are well known to be present during many types of lung diseases associated with acute respiratory distress syndrome (ARDS) and may contribute to acute lung injury. Neutrophils are poorly studied with respect to viral infection, and specifically to respiratory viral disease. Influenza A virus (IAV) infection is the cause of a respiratory disease that poses a significant global public health concern. Influenza disease presents as a relatively mild and self-limiting although highly pathogenic forms exist...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28539439/contribution-of-human-lung-parenchyma-and-leukocyte-influx-to-oxidative-stress-and-immune-mediated-pathology-following-nipah-infection
#12
Olivier Escaffre, Tais B Saito, Terry L Juelich, Tetsuro Ikegami, Jennifer K Smith, David D Perez, Colm Atkins, Corri B Levine, Matthew B Huante, Rebecca J Nusbaum, Janice J Endsley, Alexander N Freiberg, Barry Rockx
Nipah virus (NiV) is a zoonotic emerging paramyxovirus that can cause a fatal respiratory illness or encephalitis in humans. Despite many efforts, the molecular mechanisms of NiV-induced acute lung injury (ALI) remain unclear. We previously showed that NiV replicates to high titers in human lung grafts in NOD scid gamma mice, resulting in a robust inflammatory response. Interestingly, these mice can undergo human immune system reconstitution by the Bone marrow, Liver, and Thymus (BLT) reconstitution method, in addition to lung tissue engraftment, giving altogether a realistic model to study human respiratory viral infections...
May 24, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28513592/ifn-%C3%AE-increases-susceptibility-to-influenza-a-infection-through-suppression-of-group-ii-innate-lymphoid-cells
#13
D Califano, Y Furuya, S Roberts, D Avram, A N J McKenzie, D W Metzger
Increased levels of interferon-γ (IFN-γ) are routinely observed in the respiratory tract following influenza virus infection, yet its potential role remains unclear. We now demonstrate that influenza-induced IFN-γ restricts protective innate lymphoid cell group II (ILC2) function in the lung following challenge with the pandemic H1N1 A/CA/04/2009 (CA04) influenza virus. Specifically, IFN-γ deficiency resulted in enhanced ILC2 activity, characterized by increased production of interleukin (IL)-5 and amphiregulin, and improved tissue integrity, yet no change in ILC2 numbers, viral load or clearance...
May 17, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28498407/respiratory-syncytial-virus-infection-accelerates-lung-fibrosis-through-the-unfolded-protein-response-in-a-bleomycin-induced-pulmonary-fibrosis-animal-model
#14
Lina Wang, Wei Cheng, Zhimin Zhang
Emerging evidence has demonstrated that endoplasmic reticulum stress (ER) is involved in the pathogenesis of idiopathic pulmonary fibrosis, however, the underlying mechanism remains unclear. Viral infection often triggers a hyperinflammatory response by an expansion of the ER. The present study was designed to observe the role of respiratory syncytial virus infection (RSV)‑induced ER stress on lung fibrosis. In order to determine the role of ER stress on the onset and progression of pulmonary fibrosis, mice received an intratracheal combined injection of RSV and bleomycin on day 0...
July 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28489053/nasal-infection-of-enterovirus-d68-leading-to-lower-respiratory-tract-pathogenesis-in-ferrets-mustela-putorius-furo
#15
Hui-Wen Zheng, Ming Sun, Lei Guo, Jing-Jing Wang, Jie Song, Jia-Qi Li, Hong-Zhe Li, Ruo-Tong Ning, Ze-Ning Yang, Hai-Tao Fan, Zhan-Long He, Long-Ding Liu
Data from EV-D68-infected patients demonstrate that pathological changes in the lower respiratory tract are principally characterized by severe respiratory illness in children and acute flaccid myelitis. However, lack of a suitable animal model for EV-D68 infection has limited the study on the pathogenesis of this critical pathogen, and the development of a vaccine. Ferrets have been widely used to evaluate respiratory virus infections. In the current study, we used EV-D68-infected ferrets as a potential animal to identify impersonal indices, involving clinical features and histopathological changes in the upper and lower respiratory tract (URT and LRT)...
May 10, 2017: Viruses
https://www.readbyqxmd.com/read/28481637/hydrogen-sulfide-a-novel-player-in-airway-development-pathophysiology-of-respiratory-diseases-and-antiviral-defenses
#16
Nikolay Bazhanov, Maria Ansar, Teodora Ivanciuc, Roberto P Garofalo, Antonella Casola
Hydrogen sulfide (H2S) is a biologically relevant signaling molecule in mammals. Together with the volatile substances nitric oxide (NO) and carbon monoxide (CO), H2S is defined as a gasotransmitter, playing a physiological role in a variety of functions such as synaptic transmission, vascular tone, angiogenesis, inflammation and cellular signaling. The generation of H2S is catalyzed by cystathionine β-synthase (CBS), cystathionine γ-lyase (CSE) and 3 mercaptopyruvate sulfurtransferase (3-MST). The expression of CBS and CSE is tissue-specific with CBS being expressed predominantly in the brain and CSE in peripheral tissues, including lungs...
May 8, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28473895/pathogenicity-study-of-iranian-genotype-of-avian-infectious-bronchitis-virus-ir-1
#17
Hamideh Najafi, Arash Ghalyanchi Langeroudi, Masoud Hashemzadeh, Vahid Karimi, Omid Madadgar, Reza Khaltabadi Farahani, Seyed Ali Ghafouri, Hossein Maghsoudloo, Parvaneh Seifouri, Ali Madhi
Avian infectious bronchitis (IB) is a major cause of economic losses in poultry industry. The IB virus primarily affects respiratory tract, but various strains differ in their tropism for other target organs such as kidney and alimentary tract. The objective of this study was to estimate the pathogenicity of Iranian IBV variant (IR-1), which is limited exclusively to Iran. Specific pathogen free chicks were inoculated intranasally. Sera, fecal swabs and different tissue samples were collected on different days post infection (DPI)...
2017: Veterinary Research Forum
https://www.readbyqxmd.com/read/28446669/salivary-blockade-protects-the-lower-respiratory-tract-of-mice-from-lethal-influenza-virus-infection
#18
Karen Ivinson, Georgia Deliyannis, Leanne McNabb, Lara Grollo, Brad Gilbertson, David Jackson, Lorena E Brown
It is possible to model the progression of influenza virus from the upper respiratory tract to the lower respiratory tract in the mouse using viral inoculum delivered in a restricted manner to the nose. In this model, infection with the A/Udorn/307/72 (Udorn) strain of virus results ultimately in high viral titers in both the trachea and lungs. In contrast, the A/Puerto Rico/8/34 (PR8) strain causes an infection that is almost entirely limited to the nasal passages. The factors that govern the progression of virus down the respiratory tract are not well understood...
July 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28446666/mouse-saliva-inhibits-transit-of-influenza-virus-to-the-lower-respiratory-tract-by-efficiently-blocking-influenza-virus-neuraminidase-activity
#19
Brad Gilbertson, Wy Ching Ng, Simon Crawford, Jenny L McKimm-Breschkin, Lorena E Brown
We previously identified a novel inhibitor of influenza virus in mouse saliva that halts the progression of susceptible viruses from the upper to the lower respiratory tract of mice in vivo and neutralizes viral infectivity in MDCK cells. Here, we investigated the viral target of the salivary inhibitor by using reverse genetics to create hybrid viruses with some surface proteins derived from an inhibitor-sensitive strain and others from an inhibitor-resistant strain. These viruses demonstrated that the origin of the viral neuraminidase (NA), but not the hemagglutinin or matrix protein, was the determinant of susceptibility to the inhibitor...
July 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28438110/temporal-progression-of-lesions-in-guinea-pigs-infected-with-lassa-virus
#20
T M Bell, C I Shaia, J J Bearss, M E Mattix, K A Koistinen, S P Honnold, X Zeng, C D Blancett, G C Donnelly, J D Shamblin, E R Wilkinson, K A Cashman
Lassa virus (LASV) infection causes an acute, multisystemic viral hemorrhagic fever that annually infects an estimated 100 000 to 300 000 persons in West Africa. This pathogenesis study evaluated the temporal progression of disease in guinea pigs following aerosol and subcutaneous inoculation of the Josiah strain of LASV as well as the usefulness of Strain 13 guinea pigs as an animal model for Lassa fever. After experimental infection, guinea pigs ( Cavia porcellus; n = 67) were serially sampled to evaluate the temporal progression of infection, gross and histologic lesions, and serum chemistry and hematologic changes...
May 2017: Veterinary Pathology
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