keyword
MENU ▼
Read by QxMD icon Read
search

Immunopathology of viral

keyword
https://www.readbyqxmd.com/read/29145733/harnessing-novel-imaging-approaches-to-guide-hiv-prevention-and-cure-discoveries-a-national-institutes-of-health-and-global-hiv-vaccine-enterprise-2017-meeting-report
#1
Brigitte Elisabeth Sanders-Beer, Yegor Voronin, David McDonald, Anjali Singh
Advances in imaging technologies have greatly increased our understanding of cellular and molecular interactions in humans and their corresponding animal models of infectious diseases. In the HIV/SIV field, imaging has provided key insights into mucosal viral transmission, local and systemic virus spread, host-virus dynamics, and chronic inflammation/immune activation and the resultant immunopathology. Recent developments in imaging applications are yielding physical, spatial, and temporal measurements to enhance insight into biological functions and disease processes, while retaining important cellular, microenvironmental, organ and intact organism contextual details...
November 16, 2017: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/29127663/poly-i-c-priming-exacerbates-cecal-ligation-and-puncture-induced-polymicrobial-sepsis-in-mice
#2
Deepika Sharma, Ankit Malik, Nandakumar Packiriswamy, Michael D Steury, Narayanan Parameswaran
Sepsis continues to be a major healthcare issue with one of the highest mortality rates in intensive care units. Toll-like receptors are pattern recognition receptors that are intricately involved in the pathogenesis of sepsis. TLR3 is a major receptor for double-stranded RNA and is largely associated with immunity to viral infection. In this study, we examined the role of TLR3 priming in the immunopathology of sepsis using cecal-ligation and puncture (CLP) model of sepsis in mice. Mice injected with vehicle or poly(I:C) were subjected to sham or CLP surgery and various parameters of sepsis, including mortality, inflammation, and bacterial clearance were assessed...
November 10, 2017: Inflammation
https://www.readbyqxmd.com/read/29108855/hiv-patients-healthy-aging-and-transplant-recipients-can-reveal-the-hidden-footprints-of-cmv
#3
REVIEW
Shelley Waters, Emily Brook, Silvia Lee, Riwanti Estiasari, Ibnu Ariyanto, Patricia Price
Cytomegalovirus (CMV) is a β-herpesvirus. Latent infections are common in all populations. However age-associated increases in levels of CMV-reactive antibody are testament to a repeated reactivations and periods of viral replication. CMV has been associated with several diseases of aging, including vasculopathy and neurocognitive impairment. These conditions occur at a younger age in persons with particularly high burdens of CMV - transplant recipients and people living with HIV. Here we define the "clinical footprints" as immunopathologies triggered by CMV that develop over many years...
November 3, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/29103421/a-neuroprimer-principles-of-central-nervous-system-immunity
#4
Gregory P Owens
Despite longstanding perceptions, robust innate and adaptive immune responses occur within the central nervous system (CNS) in response to infection and tissue damage. Although necessary to control infection, immune responses can lead to severe CNS pathology in the context of both viral infection and autoimmunity. Research into how the central nervous and immune systems communicate has accelerated over the past 20 years leading to a better understanding of pathways controlling immune activation and neuroinflammation that have guided the approval of new disease-modifying therapies to treat CNS immunopathology, particularly the inflammatory demyelinating disease multiple sclerosis...
August 2017: Seminars in Pediatric Neurology
https://www.readbyqxmd.com/read/29076066/recombinant-baculovirus-based-vaccine-expressing-m2-protein-induces-protective-cd8-t-cell-immunity-against-respiratory-syncytial-virus-infection
#5
Jeong-Yoon Lee, Jun Chang
Respiratory syncytial virus (RSV) is an important cause of acute lower respiratory tract disease in infants, young children, immunocompromised individuals, and the elderly. However, despite ongoing efforts to develop an RSV vaccine, there is still no authorized RSV vaccine for humans. Baculovirus has attracted attention as a vaccine vector because of its ability to induce a high level of humoral and cellular immunity, low cytotoxicity against various antigens, and biological safety for humans. In this study, we constructed a recombinant baculovirus- based vaccine expressing the M2 protein of RSV under the control of cytomegalovirus promoter (Bac_RSVM2) to induce CD8(+) T-cell responses which play an important role in viral clearance, and investigated its protective efficacy against RSV infection...
November 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29033936/coinhibitory-receptor-expression-and-immune-checkpoint-blockade-maintaining-a-balance-in-cd8-t-cell-responses-to-chronic-viral-infections-and-cancer
#6
REVIEW
Isobel S Okoye, Michael Houghton, Lorne Tyrrell, Khaled Barakat, Shokrollah Elahi
In cancer and chronic viral infections, T cells are exposed to persistent antigen stimulation. This results in expression of multiple inhibitory receptors also called "immune checkpoints" by T cells. Although these inhibitory receptors under normal conditions maintain self-tolerance and prevent immunopathology, their sustained expression deteriorates T cell function: a phenomenon called exhaustion. Recent advances in cancer immunotherapy involve blockade of cytotoxic T lymphocyte antigen-4 and programmed cell death 1 in order to reverse T cell exhaustion and reinvigorate immunity, which has translated to dramatic clinical remission in many cases of metastatic melanoma and lung cancer...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29033929/immunity-and-fibrogenesis-the-role-of-th17-il-17-axis-in-hbv-and-hcv-induced-chronic-hepatitis-and-progression-to-cirrhosis
#7
REVIEW
Feliciano Chanana Paquissi
Cirrhosis is a common final pathway for most chronic liver diseases; representing an increasing burden worldwide and is associated with increased morbidity and mortality. Current evidence has shown that, after an initial injury, the immune response has a significant participation in the ongoing damage, and progression from chronic viral hepatitis (CVH) to cirrhosis, driving the activation and maintenance of main fibrogenic pathways. Among immune deregulations, those related to the subtype 17 of T helper lymphocytes (Th17)/interleukin-17 (IL-17) axis have been recognized as key immunopathological and prognostic elements in patients with CVH...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28992427/effects-of-cannabinoid-receptor-type-2-in-respiratory-syncytial-virus-infection-in-human-subjects-and-mice
#8
Alireza Tahamtan, Yazdan Samieipoor, Fatemeh Sadat Nayeri, Ali Akbar Rahbarimanesh, Anahita Izadi, Ali Rashidi-Nezhad, Masoumeh Tavakoli-Yaraki, Mohammad Farahmand, Louis Bont, Fazel Shokri, Talat Mokhatri-Azad, Vahid Salimi
An accumulating body of evidence suggests that the endocannabinoid system plays a significant role in pathophysiological processes and impacts disease severity. Here we investigate the possible role of a cannabinoid receptor type 2 (CB2) functional variant in determining disease severity and the potential pharmacological therapeutic effects of CB2 activation in viral respiratory infection. The common missense variant (CAA/CGG; Q63R) of the gene-encoding CB2 receptor (CNR2) was evaluated in 90 inpatient and 90 outpatient children with acute respiratory tract infection (ARTI)...
October 9, 2017: Virulence
https://www.readbyqxmd.com/read/28953978/early-il-6-signalling-promotes-il-27-dependent-maturation-of-regulatory-t-cells-in-the-lungs-and-resolution-of-viral-immunopathology
#9
Chloe J Pyle, Faith I Uwadiae, David P Swieboda, James A Harker
Interleukin-6 is a pleiotropic, pro-inflammatory cytokine that can promote both innate and adaptive immune responses. In humans with respiratory virus infections, such as Respiratory Syncytial Virus (RSV), elevated concentrations of IL-6 are associated with more severe disease. In contrast the polymorphisms in the Il6 promoter which favour lower IL-6 production are associated with increased risk of both RSV and Rhinovirus infections. To determine the precise contribution of IL-6 to protection and pathology we used murine models of respiratory virus infection...
September 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28915405/hepatic-immunopathology-during-occult-hepacivirus-re-infection
#10
Cordelia Manickam, Amanda J Martinot, Rhianna A Jones, Valerie Varner, R Keith Reeves
Despite drug advances for Hepatitis C virus (HCV), re-infections remain prevalent in high-risk populations. Unfortunately, the role of preexisting viral immunity and how it modulates re-infection is unclear. GBV-B infection of common marmosets is a useful model to study tissue immune responses in hepacivirus infections, and in this study we re-challenged 4 animals after clearance of primary viremia. Although only low-to-absent viremia was observed following re-challenge, GBV-B viral RNA was detectable in liver, confirming re-infection...
December 2017: Virology
https://www.readbyqxmd.com/read/28905526/transmission-and-immunopathology-of-the-avian-influenza-virus-a-anhui-1-2013-h7n9-human-isolate-in-three-commonly-commercialized-avian-species
#11
B Vidaña, R Dolz, N Busquets, A Ramis, R Sánchez, R Rivas, R Valle, I Cordón, D Solanes, J Martínez, N Majó
H7N9 virus infection is a global concern, given that it can cause severe infection and mortality in humans. However, the understanding of H7N9 epidemiology, animal reservoir species and zoonotic risk remains limited. This work evaluates the pathogenicity, transmissibility and local innate immune response of three avian species harbouring different respiratory distribution of α2,6 and α2,3 SA receptors. Muscovy ducks, European quails and SPF chickens were intranasally inoculated with 10(5) embryo infectious dose (EID)50 of the human H7N9 (A/Anhui/1/2013) influenza isolate...
September 14, 2017: Zoonoses and Public Health
https://www.readbyqxmd.com/read/28886201/extrinsically-derived-tnf-is-primarily-responsible-for-limiting-antiviral-cd8-t-cell-response-magnitude
#12
Kylie M Quinn, Wan-Ting Kan, Katherine A Watson, Brian J Liddicoat, Natasha G Swan, Hayley McQuilten, Alice E Denton, Jasmine Li, Weisan Chen, Lorena E Brown, David C Jackson, Patrick C Reading, Peter C Doherty, Katherine Kedzierska, Lukasz Kedzierski, Stephen J Turner, Nicole L La Gruta
TNF is a pro-inflammatory cytokine produced by both lymphoid and non-lymphoid cells. As a consequence of the widespread expression of its receptors (TNFR1 and 2), TNF plays a role in many important biological processes. In the context of influenza A virus (IAV) infection, TNF has variably been implicated in mediating immunopathology as well as suppression of the immune response. Although a number of cell types are able to produce TNF, the ability of CD8+ T cells to produce TNF following viral infection is a hallmark of their effector function...
2017: PloS One
https://www.readbyqxmd.com/read/28859129/rhinovirus-induction-of-fractalkine-cx3cl1-in-airway-and-peripheral-blood-mononuclear-cells-in-asthma
#13
Nadine Upton, David J Jackson, Alexandra A Nikonova, Suzie Hingley-Wilson, Musa Khaitov, Ajerico Del Rosario, Stephanie Traub, Maria-Belen Trujillo-Torralbo, Max Habibi, Sarah L Elkin, Onn M Kon, Michael R Edwards, Patrick Mallia, Joseph Footitt, Jonathan Macintyre, Luminita A Stanciu, Sebastian L Johnston, Annemarie Sykes
Rhinovirus infection is associated with the majority of asthma exacerbations. The role of fractalkine in anti-viral (type 1) and pathogenic (type 2) responses to rhinovirus infection in allergic asthma is unknown. To determine whether (1) fractalkine is produced in airway cells and in peripheral blood leucocytes, (2) rhinovirus infection increases production of fractalkine and (3) levels of fractalkine differ in asthmatic compared to non-asthmatic subjects. Fractalkine protein and mRNA levels were measured in bronchoalveolar lavage (BAL) cells and peripheral blood mononuclear cells (PBMCs) from non-asthmatic controls (n = 15) and mild allergic asthmatic (n = 15) subjects...
2017: PloS One
https://www.readbyqxmd.com/read/28851562/viral-load-affects-the-immune-response-to-hbv-in-mice-with-humanized-immune-system-and-liver
#14
Mathilde Dusséaux, Guillemette Masse-Ranson, Sylvie Darche, James Ahodantin, Yan Li, Oriane Fiquet, Elodie Beaumont, Pierrick Moreau, Lise Rivière, Christine Neuveut, Patrick Soussan, Philippe Roingeard, Dina Kremsdorf, James P Di Santo, Helene Strick-Marchand
BACKGROUND & AIMS: Hepatitis B virus (HBV) infects hepatocytes, but the mechanisms of the immune response against the virus, and how it affects disease progression, are unclear. METHODS: We performed studies with BALB/c Rag2(-/-)Il2rg(-/-)Sirpa(NOD)Alb-uPA(tg/tg) mice, stably engrafted with human hepatocytes (HUHEP) with or without a human immune system (HIS). HUHEP and HIS-HUHEP mice were given an intraperitoneal injection of HBV. Mononuclear cells were isolated from spleen and liver for analysis by flow cytometry...
August 26, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28835505/interferon-regulatory-factor-1-irf-1-protects-against-chikungunya-virus-induced-immunopathology-by-restricting-infection-in-muscle-cells
#15
Sharmila Nair, Subhajit Poddar, Raeann M Shimak, Michael S Diamond
The innate immune system protects cells against viral pathogens in part through the autocrine and paracrine actions of interferons (IFN)-α/β (type I), -γ (type II), and -λ (type III). The transcription factor interferon regulatory factor (IRF)-1 has a demonstrated role in shaping innate and adaptive antiviral immunity by inducing the expression of IFN stimulated genes (ISGs) and mediating signals downstream of IFN-γ. Although ectopic expression experiments have suggested an inhibitory function of IRF-1 against infection of alphaviruses in cell culture, its role in vivo remains unknown...
August 23, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28818789/immune-mechanisms-of-respiratory-viral-infections-in-asthma
#16
REVIEW
Hugo A Farne, Sebastian L Johnston
The more severe pathology respiratory viral infections produce in asthma sufferers is a result of a dysregulated immune response. Excess type 2 inflammation is a well-described feature of virally induced asthma exacerbations, with growing evidence that production of antiviral interferons may also be impaired. However, the mechanisms underlying these are little understood. This review summarizes the current understanding and recent discoveries of the cellular and molecular events that follow viral infections in asthma...
October 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28808975/isolation-of-group-2-innate-lymphoid-cells-from-mouse-lungs
#17
Claudia U Duerr, Jörg H Fritz
The recently described group 2 innate lymphoid cells (ILC2) exert critical roles in type 2 immune responses, epithelial repair at mucosal tissues and metabolic homeostasis. ILC2 release large amounts of type 2 cytokines such as interleukin 4 (IL-4), IL-5, and IL-13, driving type 2 immunity such as the defense against helminths. However, if not tightly regulated ILC2 can trigger unwanted type 2 immunopathologies including allergic airway inflammation, airway hyper-responsiveness, and atopic dermatitis. Viral respiratory tract infections, archetypal triggers of type 1 immune responses, often give rise to pulmonary type 2 immunopathologies such as asthma and asthma exacerbations...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28774302/airway-and-parenchyma-immune-cells-in-influenza-a-h1n1-pdm09-viral-and-non-viral-diffuse-alveolar-damage
#18
Monique Buttignol, Ruy Camargo Pires-Neto, Renata Calciolari Rossi E Silva, Marina Ballarin Albino, Marisa Dolhnikoff, Thais Mauad
BACKGROUND: Diffuse alveolar damage (DAD), which is the histological surrogate for acute respiratory distress syndrome (ARDS), has a multifactorial aetiology. Therefore it is possible that the immunopathology differs among the various presentations of DAD. The aim of this study is to compare lung immunopathology of viral (influenza A(H1N1)pdm09) to non-viral, extrapulmonary aetiologies in autopsy cases with DAD. METHODS: The lung tissue of 44 patients, was divided in the H1N1 group (n = 15) characterized by severe pulmonary injury due to influenza A(H1N1)pdm09 infection; the ARDS group (n = 13), characterized by patients with DAD due to non-pulmonary causes; and the Control group (n = 16), consisting of patients with non-pulmonary causes of death...
August 3, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28765225/b-cell-requirement-for-robust-regulatory-t-cell-responses-to-friend-retrovirus-infection
#19
Tyler C Moore, Lorena M Gonzaga, Jennifer M Mather, Ronald J Messer, Kim J Hasenkrug
Regulatory T cells (Tregs) are immunosuppressive cells of the immune system that control autoimmune reactivity. Tregs also respond during immune reactions to infectious agents in order to limit immunopathological damage from potent effectors such as CD8(+) cytolytic T lymphocytes. We have used the Friend virus (FV) model of retroviral infection in mice to investigate how viral infections induce Tregs. During acute FV infection, there is significant activation and expansion of thymus-derived (natural) Tregs that suppress virus-specific CD8(+) T cell responses...
August 1, 2017: MBio
https://www.readbyqxmd.com/read/28749409/host-response-comparison-of-h1n1-and-h5n1-infected-mice-identifies-two-potential-death-mechanisms
#20
Olivier Leymarie, Léa Meyer, Pierre-Louis Hervé, Bruno Da Costa, Bernard Delmas, Christophe Chevalier, Ronan Le Goffic
Highly pathogenic influenza A viruses (IAV) infections represent a serious threat to humans due to their considerable morbidity and mortality capacities. A good understanding of the molecular mechanisms responsible for the acute lung injury observed during this kind of infection is essential to design adapted therapies. In the current study, using an unbiased transcriptomic approach, we compared the host-responses of mice infected with two different subtypes of IAV: H1N1 vs. H5N1. The host-response comparison demonstrated a clear difference between the transcriptomic profiles of H1N1- and H5N1-infected mice despite identical survival kinetics and similar viral replications...
July 27, 2017: International Journal of Molecular Sciences
keyword
keyword
104888
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"