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Virus and pulmonary fibrosis

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https://www.readbyqxmd.com/read/28860146/il-17-in-the-lung-the-good-the-bad-and-the-ugly
#1
Stephen James Gurczynski, Bethany B Moore
The IL-17 family of cytokines has emerged over the last two decades as a pleiotropic group of molecules that function in a wide variety of both beneficial and detrimental (pathologic) processes mainly in mucosal barrier tissue. The beneficial effects of IL-17 expression are especially important in the lung where exposure to foreign agents is abundant. IL-17A plays an important role in protection from both extracellular bacteria and fungi as well as viruses that infect cells of the mucosal tracts. IL-17 co-regulated cytokines such as IL-22 are involved in maintaining epithelial cell homeostasis and participate in epithelial cell repair / regeneration following inflammatory insults...
August 31, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28834662/human-immunodeficiency-virus-associated-heart-failure-in-sub-saharan-africa-evolution-in-the-epidemiology-pathophysiology-and-clinical-manifestations-in-the-antiretroviral-era
#2
REVIEW
Ntobeko A B Ntusi, Mpiko Ntsekhe
The survival of patients with human immunodeficiency virus (HIV)/acquired immunodeficiency syndrome (AIDS) who have access to highly active antiretroviral therapy (ART) has dramatically increased in recent times. This review focuses on HIV-associated heart failure in sub-Saharan Africa (SSA). In HIV infected persons, heart failure may be related to pathology of the pericardium, the myocardium, the valves, the conduction system, or the coronary and pulmonary vasculature. HIV-associated heart failure can be because of direct consequences of HIV infection, autoimmune reactions, pro-inflammatory cytokines, opportunistic infections (OIs) or neoplasms, use of ART or therapy for OIs and presence of traditional cardiovascular risk factors...
September 2016: ESC Heart Failure
https://www.readbyqxmd.com/read/28798254/oxygen-dependent-changes-in-lung-development-do-not-affect-epithelial-infection-with-influenza-a-virus
#3
William Domm, Min Yee, Ravi S Misra, Robert Gelein, Aitor Nogales, Luis Martinez Sobrido, Michael A O'Reilly
Infants born prematurely often require supplemental oxygen that contributes to aberrant lung development and increased pulmonary morbidity following a respiratory viral infection. We have been using a mouse model to understand how early-life hyperoxia affects the adult lung response to influenza A virus (IAV) infection. Prior studies showed how neonatal hyperoxia (100% oxygen) increased sensitivity of adult mice to infection with influenza A virus (IAV (A/Hong Kong/X31) H3N2) as defined by persistent inflammation, pulmonary fibrosis, and mortality...
August 10, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28775098/influenza-virus-infection-alters-ion-channel-function-of-airway-and-alveolar-cells-mechanisms-and-physiological-sequelae
#4
James D Londino, Ahmed Lazrak, James F Collawn, Zsuzsanna Bebok, Kevin S Harrod, Sadis Matalon
The cystic fibrosis transmembrane conductance regulator (CFTR) and the amiloride-sensitive epithelial sodium channels (ENaC) are located in the apical membranes of airway and alveolar epithelial cells. These transporters play an important role in the regulation of lung fluid balance across airway and alveolar epithelia by being the conduits for chloride (Cl(-)) and bicarbonate (HCO3(-)) secretion and sodium (Na(+)) ion absorption, respectively. The functional role of these channels in the respiratory tract is to maintain the optimum volume and ionic composition of the bronchial pericilary fluid (PCL) and alveolar lining fluid (ALF) layers...
August 3, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28656009/role-of-microbial-agents-in-pulmonary-fibrosis%C3%A2
#5
REVIEW
Ozioma S Chioma, Wonder P Drake
Pulmonary fibrosis is a form of lung disease that develops due to aberrant wound-healing following repeated alveoli injury in genetically susceptible individuals, resulting in chronic inflammation, excess deposition of the extracellular matrix components, mainly collagen, and scarring of lung tissue. In addition to irradiation, environmental agents such occupational inhalants, and chemotherapeutic agents, microbial agents also play a role in the etiology of the disease. While viruses have received the most attention, emerging evidence suggest that bacteria and fungi also play a part in the etiology of pulmonary fibrosis...
June 2017: Yale Journal of Biology and Medicine
https://www.readbyqxmd.com/read/28533489/sirtuin-6-inhibits-epithelial-to-mesenchymal-transition-during-idiopathic-pulmonary-fibrosis-via-inactivating-tgf-%C3%AE-1-smad3-signaling
#6
Kunming Tian, Panpan Chen, Zhiping Liu, Shutian Si, Qian Zhang, Yong Mou, Lianyong Han, Qin Wang, Xue Zhou
Sirt6 which is implicated in the control of aging, cancer, and metabolism, has been shown to have anti-fibrosis function in heart and liver. However, whether Sirt6 inhibits idiopathic pulmonary fibrosis remains elusive. Epithelial to mesenchymal transition has been found to be involved in the pathogenesis of idiopathic pulmonary fibrosis. In the present study, forced expression of Sirt6 significantly abrogated TGF-β1-induced epithelial to mesenchymal transition-like phenotype and cell behaviors in A549 cells...
May 9, 2017: Oncotarget
https://www.readbyqxmd.com/read/28507181/fli1-deficiency-induces-cxcl6-expression-in-dermal-fibroblasts-and-endothelial-cells-contributing-to-the-development-of-fibrosis-and-vasculopathy-in-systemic-sclerosis
#7
Takashi Taniguchi, Yoshihide Asano, Kouki Nakamura, Takashi Yamashita, Ryosuke Saigusa, Yohei Ichimura, Takehiro Takahashi, Tetsuo Toyama, Ayumi Yoshizaki, Shinichi Sato
OBJECTIVE: CXCL6, a chemokine with proangiogenic property, is reported to be involved in vasculopathy associated with systemic sclerosis (SSc). We investigated the contribution of CXCL6 to SSc development by focusing on the association of friend leukemia virus integration 1 (Fli1) deficiency, a potential predisposing factor of SSc, with CXCL6 expression and clinical correlation of serum CXCL6 levels. METHODS: mRNA levels of target genes and the binding of Fli1 to the CXCL6 promoter were evaluated by quantitative reverse transcription-PCR and chromatin immunoprecipitation, respectively...
May 15, 2017: Journal of Rheumatology
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
#8
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/28468623/acute-cigarette-smoke-exposure-activates-apoptotic-and-inflammatory-programs-but-a-second-stimulus-is-required-to-induce-epithelial-to-mesenchymal-transition-in-copd-epithelium
#9
Lynne A Murray, Rebecca Dunmore, Ana Camelo, Carla A Da Silva, Malin J Gustavsson, David M Habiel, Tillie L Hackett, Cory M Hogaboam, Matthew A Sleeman, Darryl A Knight
BACKGROUND: Smoking and aberrant epithelial responses are risk factors for lung cancer as well as chronic obstructive pulmonary disease and idiopathic pulmonary fibrosis. In these conditions, disease progression is associated with epithelial damage and fragility, airway remodelling and sub-epithelial fibrosis. The aim of this study was to assess the acute effects of cigarette smoke on epithelial cell phenotype and pro-fibrotic responses in vitro and in vivo. RESULTS: Apoptosis was significantly greater in unstimulated cells from COPD patients compared to control, but proliferation and CXCL8 release were not different...
May 3, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28458673/inflammatory-responses-regulating-alveolar-ion-transport-during-pulmonary-infections
#10
REVIEW
Christin Peteranderl, Jacob I Sznajder, Susanne Herold, Emilia Lecuona
The respiratory epithelium is lined by a tightly balanced fluid layer that allows normal O2 and CO2 exchange and maintains surface tension and host defense. To maintain alveolar fluid homeostasis, both the integrity of the alveolar-capillary barrier and the expression of epithelial ion channels and pumps are necessary to establish a vectorial ion gradient. However, during pulmonary infection, auto- and/or paracrine-acting mediators induce pathophysiological changes of the alveolar-capillary barrier, altered expression of epithelial Na,K-ATPase and of epithelial ion channels including epithelial sodium channel and cystic fibrosis membrane conductance regulator, leading to the accumulation of edema and impaired alveolar fluid clearance...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28452706/respiratory-viral-detection-in-the-paranasal-sinuses-of-patients-with-cystic-fibrosis
#11
Nicholas R Rowan, Eric W Wang, Alyssa Kanaan, Nivedita Sahu, John V Williams, Caleb D Phillips, Stella E Lee
BACKGROUND: Pulmonary colonization with antibiotic-resistant organisms in patients with cystic fibrosis (CF) is often preceded by upper-airway infections. Although there is a well-described relationship between pulmonary respiratory viral infections and overall disease progression of CF, the pathogenicity of respiratory viral infections in the paranasal sinuses of patients with CF remains unknown. With recent advances in respiratory virus detection techniques, this study sought to detect the presence of respiratory viruses in the paranasal sinuses of patients with CF in comparison with healthy controls and to correlate the viral presence with clinical measures of sinonasal disease...
March 1, 2017: American Journal of Rhinology & Allergy
https://www.readbyqxmd.com/read/28436965/a-three-dimensional-model-of-human-lung-development-and-disease-from-pluripotent-stem-cells
#12
Ya-Wen Chen, Sarah Xuelian Huang, Ana Luisa Rodrigues Toste de Carvalho, Siu-Hong Ho, Mohammad Naimul Islam, Stefano Volpi, Luigi D Notarangelo, Michael Ciancanelli, Jean-Laurent Casanova, Jahar Bhattacharya, Alice F Liang, Laura M Palermo, Matteo Porotto, Anne Moscona, Hans-Willem Snoeck
Recapitulation of lung development from human pluripotent stem cells (hPSCs) in three dimensions (3D) would allow deeper insight into human development, as well as the development of innovative strategies for disease modelling, drug discovery and regenerative medicine. We report here the generation from hPSCs of lung bud organoids (LBOs) that contain mesoderm and pulmonary endoderm and develop into branching airway and early alveolar structures after xenotransplantation and in Matrigel 3D culture. Expression analysis and structural features indicated that the branching structures reached the second trimester of human gestation...
May 2017: Nature Cell Biology
https://www.readbyqxmd.com/read/28404843/overactive-epidermal-growth-factor-receptor-signaling-leads-to-increased-fibrosis-after-severe-acute-respiratory-syndrome-coronavirus-infection
#13
Thiagarajan Venkataraman, Christopher M Coleman, Matthew B Frieman
Severe acute respiratory syndrome coronavirus (SARS-CoV) is a highly pathogenic respiratory virus that causes morbidity and mortality in humans. After infection with SARS-CoV, the acute lung injury caused by the virus must be repaired to regain lung function. A dysregulation in this wound healing process leads to fibrosis. Many survivors of SARS-CoV infection develop pulmonary fibrosis (PF), with higher prevalence in older patients. Using mouse models of SARS-CoV pathogenesis, we have identified that the wound repair pathway, controlled by the epidermal growth factor receptor (EGFR), is critical to recovery from SARS-CoV-induced tissue damage...
June 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28404649/the-microbiome-in-respiratory-medicine-current-challenges-and-future-perspectives
#14
REVIEW
Rosa Faner, Oriol Sibila, Alvar Agustí, Eric Bernasconi, James D Chalmers, Gary B Huffnagle, Chaysavanh Manichanh, Philip L Molyneaux, Roger Paredes, Vicente Pérez Brocal, Julia Ponomarenko, Sanjay Sethi, Jordi Dorca, Eduard Monsó
The healthy lung has previously been considered to be a sterile organ because standard microbiological culture techniques consistently yield negative results. However, culture-independent techniques report that large numbers of microorganisms coexist in the lung. There are many unknown aspects in the field, but available reports show that the lower respiratory tract microbiota: 1) is similar in healthy subjects to the oropharyngeal microbiota and dominated by members of the Firmicutes, Bacteroidetes and Proteobacteria phyla; 2) shows changes in smokers and well-defined differences in chronic respiratory diseases, although the temporal and spatial kinetics of these changes are only partially known; and 3) shows relatively abundant non-cultivable bacteria in chronic obstructive pulmonary disease, idiopathic pulmonary fibrosis, cystic fibrosis and bronchiectasis, with specific patterns for each disease...
April 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28390872/the-role-of-epidermal-growth-factor-receptor-egfr-signaling-in-sars-coronavirus-induced-pulmonary-fibrosis
#15
REVIEW
Thiagarajan Venkataraman, Matthew B Frieman
Many survivors of the 2003 outbreak of severe acute respiratory syndrome (SARS) developed residual pulmonary fibrosis with increased severity seen in older patients. Autopsies of patients that died from SARS also showed fibrosis to varying extents. Pulmonary fibrosis can be occasionally seen as a consequence to several respiratory viral infections but is much more common after a SARS coronavirus (SARS-CoV) infection. Given the threat of future outbreaks of severe coronavirus disease, including Middle East respiratory syndrome (MERS), it is important to understand the mechanisms responsible for pulmonary fibrosis, so as to support the development of therapeutic countermeasures and mitigate sequelae of infection...
July 2017: Antiviral Research
https://www.readbyqxmd.com/read/28387447/withdrawn-interventions-for-fatigue-and-weight-loss-in-adults-with-advanced-progressive-illness
#16
REVIEW
Cathy Payne, Philip J Wiffen, Suzanne Martin
BACKGROUND: Fatigue and unintentional weight loss are two of the commonest symptoms experienced by people with advanced progressive illness. Appropriate interventions may bring considerable improvements in function and quality of life to seriously ill people and their families, reducing physical, psychological and spiritual distress. OBJECTIVES: To conduct an overview of the evidence available on the efficacy of interventions used in the management of fatigue and/or unintentional weight loss in adults with advanced progressive illness by reviewing the evidence contained within Cochrane reviews...
April 7, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28361411/study-of-smad-dependent-signal-pathway-in-the-development-of-early-pulmonary-fibrosis-in-mice-infected-with-influenza-a-h1n1-virus
#17
E V Shatskaya, A V Kovner, O V Potapova, L A Cherdantseva, V A Shkurupy, A M Shestopalov
Early fibrosis of the visceral organs is one of the main complications of infection caused by influenza A virus. Structural manifestations and molecular regulators of the epithelialmesenchymal transformation as a possible mechanism of fibrosis progression were studied in mice infected with influenza A/H1N1 A/Tomsk/13/2010 virus. We found early fibrosis of the lungs against the background of minor changes in fibroblast count. However, enhanced expression of TGF-β and SMAD-2 by macrophages and alveolocytes attested to possible development of epithelial-mesenchymal transformation and its contribution to activation of fibrogenesis process in the lungs...
March 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28346434/optimization-of-adeno-associated-virus-vector-mediated-gene-transfer-to-the-respiratory-tract
#18
F Kurosaki, R Uchibori, N Mato, Y Sehara, Y Saga, M Urabe, H Mizukami, Y Sugiyama, A Kume
An efficient adeno-associated virus (AAV) vector was constructed for the treatment of respiratory diseases. AAV serotypes, promoters and routes of administration potentially influencing the efficiency of gene transfer to airway cells were examined in the present study. Among the nine AAV serotypes (AAV1-9) screened in vitro and four serotypes (AAV1, 2, 6, 9) evaluated in vivo, AAV6 showed the strongest transgene expression. As for promoters, the cytomegalovirus (CMV) early enhancer/chicken β-actin (CAG) promoter resulted in more robust transduction than the CMV promoter...
May 2017: Gene Therapy
https://www.readbyqxmd.com/read/28340310/viruses-in-cystic-fibrosis-patients-airways
#19
Lisa Billard, Rozenn Le Berre, Léa Pilorgé, Christopher Payan, Geneviève Héry-Arnaud, Sophie Vallet
Although bacteria have historically been considered to play a major role in cystic fibrosis (CF) airway damage, a strong impact of respiratory viral infections (RVI) is also now recognized. Emerging evidence confirms that respiratory viruses are associated with deterioration of pulmonary function and exacerbation and facilitation of bacterial colonization in CF patients. The aim of this review is to provide an overview of the current knowledge on respiratory viruses in CF airways, to discuss the resulting inflammation and RVI response, to determine how to detect the viruses, and to assess their clinical consequences, prevalence, and interactions with bacteria...
March 24, 2017: Critical Reviews in Microbiology
https://www.readbyqxmd.com/read/28332341/risk%C3%A2-factors-for-acute-exacerbation-of-idiopathic-pulmonary-fibrosis-a-systematic-review-and-meta-analysis
#20
Meihua Qiu, Yuqing Chen, Qiao Ye
BACKGROUND: Idiopathic pulmonary fibrosis (IPF) is a chronic and progressive fibrotic disease limited to the lungs. The course of disease varies widely, with some patients experiencing acute respiratory deterioration, a condition called acute exacerbations of IPF (AE-IPF). The risk factors contributing to AE-IPF are unclear. This systematic review and meta-analysis investigated the risk factors for AE-IPF. METHODS: Studies of risk factors for AE-IPF were identified in Medline, EMBASE and Cochrane databases...
March 23, 2017: Clinical Respiratory Journal
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