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Innate immunity

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https://www.readbyqxmd.com/read/28531376/immune-cell-signaling-in-autoimmune-diseases
#1
REVIEW
George C Tsokos, Noel R Rose
On September 20, 2016 the American Autoimmune Related Disease Association convened a selected group of 16 experts in Washington DC to discuss current issues and future directions of research in autoimmune diseases from the cell signaling perspective. The major topics considered included new findings on the follicular T cell cells in mice, their metabolic patterns and their control by the newly discovered T follicular regulatory cells. Current work on the metabolic pathways deemed important for the function of T cells was presented...
May 19, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28531216/impact-of-mutations-in-toll-like-receptor-pathway-genes-on-esophageal-carcinogenesis
#2
Daffolyn Rachael Fels Elliott, Juliane Perner, Xiaodun Li, Martyn F Symmons, Brett Verstak, Matthew Eldridge, Lawrence Bower, Maria O'Donovan, Nick J Gay, Rebecca C Fitzgerald
Esophageal adenocarcinoma (EAC) develops in an inflammatory microenvironment with reduced microbial diversity, but mechanisms for these influences remain poorly characterized. We hypothesized that mutations targeting the Toll-like receptor (TLR) pathway could disrupt innate immune signaling and promote a microenvironment that favors tumorigenesis. Through interrogating whole genome sequencing data from 171 EAC patients, we showed that non-synonymous mutations collectively affect the TLR pathway in 25/171 (14...
May 22, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28531130/comparative-safety-and-efficacy-profile-of-a-novel-oil-in-water-vaccine-adjuvant-comprising-vitamins-a-and-e-and-a-catechin-in-protective-anti-influenza-immunity
#3
Sapna Patel, Yasser Faraj, Debra K Duso, William W Reiley, Erik A Karlsson, Stacey Schultz-Cherry, Michael Vajdy
Non-replicating vaccines, such as those based on recombinant proteins, require adjuvants and delivery systems, which have thus far depended on mimicking pathogen danger signals and strong pro-inflammatory responses. In search of a safer and more efficacious alternative, we tested whether vaccinations with influenza recombinant hemagglutinin (HA) mixed with a novel vegetable oil in water emulsion adjuvant (Natural Immune-enhancing Delivery System, NIDS), based on the immune-enhancing synergy of vitamins A and E and a catechin, could protect against intra-nasal challenge with live influenza virus...
May 21, 2017: Nutrients
https://www.readbyqxmd.com/read/28530841/the-increased-expression-of-toll-like-receptor-4-in-renal-and-skin-lesions-in-lupus-erythematosus
#4
Nesrine Elloumi, Raouia Fakhfakh, Lobna Ayadi, Khadija Sellami, Olfa Abida, Mariem Ben Jmaa, Tahya Sellami, Khawla Kammoun, Hatem Masmoudi
Toll-like receptor 4 (TLR-4), a bacterial lipopolysaccharide sensor, is an innate immunity essential modulator. It is expressed on both immune and non-immune cells and may contribute to the cutaneous and renal manifestations during lupus erythematosus (LE). Our purpose is to evaluate TLR-4 expression and analyzing its role in lupus nephritis (LN) and chronic cutaneous lupus erythematosus (CLE) pathogenesis. TLR-4 immunohistochemical staining was performed on 30 LN renal biopsies compared with 11 healthy renal tissues and 30 skin biopsies from CLE patients compared with 15 normal individuals...
May 1, 2017: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/28530643/danger-signals-in-regulating-the-immune-response-to-solid-organ-transplantation
#5
Jamie L Todd, Scott M Palmer
Endogenous danger signals, or damage-associated molecular patterns (DAMPs), are generated in response to cell stress and activate innate immunity to provide a pivotal mechanism by which an organism can respond to damaged self. Accumulating experimental and clinical data have established the importance of DAMPs, which signal through innate pattern recognition receptors (PRRs) or DAMP-specific receptors, in regulating the alloresponse to solid organ transplantation (SOT). Moreover, DAMPs may incite distinct downstream cellular responses that could specifically contribute to the development of allograft fibrosis and chronic graft dysfunction...
May 22, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28530548/critical-role-of-rig-i-and-mda5-in-early-and-late-stages-of-tulane-virus-infection
#6
Preeti Chhabra, Priya Ranjan, Theresa Cromeans, Suryaprakash Sambhara, Jan Vinjé
Human noroviruses are a major cause of acute gastroenteritis worldwide, but the lack of a robust cell culture system or small animal model have hampered a better understanding of innate immunity against these viruses. Tulane virus (TV) is the prototype virus of a tentative new genus, Recovirus, in the family Caliciviridae. Its epidemiology and biological properties most closely resemble human norovirus. The host innate immune response to RNA virus infection primarily involves pathogen-sensing toll-like receptors (TLRs) TLR3 and TLR7 and retinoic acid-inducible gene I-like receptor RIG-I and melanoma differentiation associated gene 5 (MDA5)...
May 22, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28530443/association-of-single-nucleotide-polymorphism-in-the-hepcidin-promoter-gene-with-susceptibility-to-extrapulmonary-tuberculosis
#7
Li Liang, Huijuan Liu, Jun Yue, Li-Rong Liu, Min Han, Liu-Lin Luo, Yan-Lin Zhao, Heping Xiao
BACKGROUND: Hepcidin is a 25-amino acid peptide produced by the liver in response to inflammation and iron overload. It is encoded by the hepcidin antimicrobial peptide (HAMP) gene and plays a key role in innate immunity. Previous studies have reported that a -582 A>G polymorphism in the HAMP promoter (HAMP-P) affects hepcidin expression, causing susceptibility to various bacterial and viral pathogens. However, it is not known whether the HAMP-P -582 A>G polymorphism is associated with tuberculosis (TB) susceptibility...
May 22, 2017: Genetic Testing and Molecular Biomarkers
https://www.readbyqxmd.com/read/28530057/-hansen-s-disease-in-israel
#8
REVIEW
Leon Gilead, Ruth Wexler
Hansen's disease (HD) is an anthropophylic, infectious, chronic disease, caused by Mycobacterium leprae. The systemic disease, affecting both males and females at any age, involves mainly the skin and the peripheral nerves located in the limbs close to the skin. Traditionally the treatment of HD patients was entrusted to dermatologists. Current drug therapy given at an early stage can prevent many of the complications, and enables patients to go on with life. In 95% of the population there is an innate immunity, which following exposure, enables the development of an effective immune response preventing the development of overt clinical disease...
October 2016: Harefuah
https://www.readbyqxmd.com/read/28529959/getting-inside-type-i-ifns-type-i-ifns-in-intracellular-bacterial-infections
#9
REVIEW
Deann T Snyder, Jodi F Hedges, Mark A Jutila
Type I interferons represent a unique and complex group of cytokines, serving many purposes during innate and adaptive immunity. Discovered in the context of viral infections, type I IFNs are now known to have myriad effects in infectious and autoimmune disease settings. Type I IFN signaling during bacterial infections is dependent on many factors including whether the infecting bacterium is intracellular or extracellular, as different signaling pathways are activated. As such, the repercussions of type I IFN induction can positively or negatively impact the disease outcome...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28529938/senescence-inflammatory-regulation-of-reparative-cellular-reprogramming-in-aging-and-cancer
#10
Javier A Menendez, Tomás Alarcón
The inability of adult tissues to transitorily generate cells with functional stem cell-like properties is a major obstacle to tissue self-repair. Nuclear reprogramming-like phenomena that induce a transient acquisition of epigenetic plasticity and phenotype malleability may constitute a reparative route through which human tissues respond to injury, stress, and disease. However, tissue rejuvenation should involve not only the transient epigenetic reprogramming of differentiated cells, but also the committed re-acquisition of the original or alternative committed cell fate...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28529930/the-central-role-of-ifi204-in-ifn-%C3%AE-release-and-autophagy-activation-during-mycobacterium-bovis-infection
#11
Liu Chunfa, Sun Xin, Li Qiang, Srinand Sreevatsan, Lifeng Yang, Deming Zhao, Xiangmei Zhou
Mycobacterium bovis (M. bovis) is the pathogen of animals and humans that can replicate in the phagosomes of myeloid cells. Cytosolic detection of bacterial products plays a crucial role in initiating the innate immune response, including autophagy activation and interferon-β (IFN-β) release. Although IFN-β release and autophagy activation have been reported during mycobacterium infection, the mechanisms underlying remains poorly defined. Here, we demonstrated that IFN-β release increases in macrophages exposed to M...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28529928/the-probiotic-compound-vsl-3-modulates-mucosal-peripheral-and-systemic-immunity-following-murine-broad-spectrum-antibiotic-treatment
#12
Ira Ekmekciu, Eliane von Klitzing, Ulrike Fiebiger, Christian Neumann, Petra Bacher, Alexander Scheffold, Stefan Bereswill, Markus M Heimesaat
There is compelling evidence linking the commensal intestinal microbiota with host health and, in turn, antibiotic induced perturbations of microbiota composition with distinct pathologies. Despite the attractiveness of probiotic therapy as a tool to beneficially alter the intestinal microbiota, its immunological effects are still incompletely understood. The aim of the present study was to assess the efficacy of the probiotic formulation VSL#3 consisting of eight distinct bacterial species (including Streptococcus thermophilus, Bifidobacterium breve, B...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28529927/staphylococcus-aureus-manipulates-innate-immunity-through-own-and-host-expressed-proteases
#13
REVIEW
Giampiero Pietrocola, Giulia Nobile, Simonetta Rindi, Pietro Speziale
Neutrophils, complement system and skin collectively represent the main elements of the innate immune system, the first line of defense of the host against many common microorganisms. Bacterial pathogens have evolved strategies to counteract all these defense activities. Specifically, Staphylococcus aureus, a major human pathogen, secretes a variety of immune evasion molecules including proteases, which cleave components of the innate immune system or disrupt the integrity of extracellular matrix and intercellular connections of tissues...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28529904/mini-review-of-conventional-and-hypofractionated-radiation-therapy-combined-with-immunotherapy-for-non-small-cell-lung-cancer
#14
REVIEW
Allison M Campbell, Roy H Decker
A successful antitumoral response requires immunological activation as well as an antigenic pool capable of stimulating both the innate and the adaptive immune system. Recent advances in immunotherapy have been aimed at boosting the activation status of the innate and adaptive immune system, including cytokine administration, monoclonal antibodies engineered to target high yield elements in oncogenic signaling pathways, cancer vaccines, and checkpoint inhibitors. Herein, we examine the ways that radiation therapy induced cell death provides a pool of stimulus antigen, and draw parallels from the immunobiology of autoimmunity to explore how the immunogenicity of antigen derived from radiation-induced cell death might augment the antitumoral response...
April 2017: Translational Lung Cancer Research
https://www.readbyqxmd.com/read/28529900/immunotherapy-and-radiation-therapy-for-operable-early-stage-and-locally-advanced-non-small-cell-lung-cancer
#15
REVIEW
Neil K Taunk, Andreas Rimner, Melissa Culligan, Joseph S Friedberg, Julie Brahmer, Jamie Chaft
Non-small cell lung cancer (NSCLC) is the most common cause of cancer mortality. Although a significant proportion of patients can be cured with surgery, with or without adjuvant or neoadjuvant chemotherapy and radiation, a significant proportion of patients will fail, particularly distantly. Over fifty percent of patients present with stage IV disease. There are multiple forms of immunotherapy available including T-cell transfer, cytokine therapy, and oncolytic viruses. Checkpoint inhibitors have shown tremendous activity in NSCLC and are currently under intense study given promising data on response...
April 2017: Translational Lung Cancer Research
https://www.readbyqxmd.com/read/28529509/a-novel-esat-6-secretion-system-secreted-protein-esxx-of-community-associated-staphylococcus-aureus-lineage-st398-contributes-to-immune-evasion-and-virulence
#16
Yingxin Dai, Yanan Wang, Qian Liu, Qianqian Gao, Huiying Lu, Hongwei Meng, Juanxiu Qin, Mo Hu, Min Li
The ESAT-6 secretion system (ESS) has been reported to contribute to the virulence and pathogenicity of several Staphylococcus aureus strains such as USA300 and Newman. However, the role of the ESS in community-associated S. aureus (CA-SA) lineage ST398 in China is not well understood. By comparing the ess locus of ST398 with the published S. aureus sequence in the NCBI database, we found one gene in the ess locus encoding a novel WXG superfamily protein that is highly conserved only in ST398. LC-MS/MS and Western blot analysis revealed that this protein is a novel secreted protein controlled by the ST398 ESS, and we named the protein EsxX...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28528860/purifying-selection-and-concerted-evolution-of-rna-sensing-toll-like-receptors-in-migratory-waders
#17
Nynke Raven, Simeon Lisovski, Marcel Klaassen, Nathan Lo, Thomas Madsen, Simon Y W Ho, Beata Ujvari
Migratory birds encounter a broad range of pathogens during their journeys, making them ideal models for studying immune gene evolution. Despite the potential value of these species to immunoecology and disease epidemiology, previous studies have typically focused on their adaptive immune gene repertoires. In this study, we examined the evolution of innate immune genes in three long-distance migratory waders (order Charadriiformes). We analysed two parts of the extracellular domains of two Toll-like receptors (TLR3 and TLR7) involved in virus recognition in the Sanderling (Calidris alba), Red-necked Stint (Calidris ruficollis), and Ruddy Turnstone (Arenaria interpres)...
May 18, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28528707/molecular-transcriptional-and-functional-insights-into-duplicated-goose-type-lysozymes-from-sebastes-schlegelii-and-their-potential-immunological-role
#18
Jehanathan Nilojan, S D N K Bathige, Roopasingam Kugapreethan, W S Thulasitha, Bo-Hye Nam, Jehee Lee
Black rockfish (Sebastes schlegelii), an important aquaculture species in Korea, has been affected by bacterial diseases leading to a drastic decline in production. Goose-type lysozyme (LysG) is a key enzyme of the innate immune system to eradicate bacterial infections. In this study, two isoforms of LysG from black rockfish, designated as RfLysG1 and RfLysG2, have been identified and characterized at the molecular, transcriptional, and functional levels. The deduced amino acid sequences had the LysG family characteristics and exhibited conserved properties, including active residues and domains...
May 18, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28528647/transition-metal-homeostasis-in-streptococcus-pyogenes-and-streptococcus-pneumoniae
#19
Andrew G Turner, Cheryl-Lynn Y Ong, Mark J Walker, Karrera Y Djoko, Alastair G McEwan
Trace metals such as Fe, Mn, Zn and Cu are essential for various biological functions including proper innate immune function. The host immune system has complicated and coordinated mechanisms in place to either starve and/or overload invading pathogens with various metals to combat the infection. Here, we discuss the roles of Fe, Mn and Zn in terms of nutritional immunity, and also the roles of Cu and Zn in metal overload in relation to the physiology and pathogenesis of two human streptococcal species, Streptococcus pneumoniae and Streptococcus pyogenes...
2017: Advances in Microbial Physiology
https://www.readbyqxmd.com/read/28528521/myeloid-populations-in-systemic-autoimmune-diseases
#20
REVIEW
María Morell, Nieves Varela, Concepción Marañón
Systemic autoimmune diseases (SADs) encompass a wide spectrum of clinical signs as a reflection of their complex physiopathology. A variety of mechanisms related with the innate immune system are in the origin of the loss of self-tolerance in these diseases, and for most of them, the myeloid leukocytes are key actors. Monocytes, macrophages, dendritic cells, and neutrophils are first-line immune effectors located in the interface between innate and adaptive immunity. They are crucial in the organization of the local and systemic responses to damage-associated molecular patterns (DAMPs) and determine the intensity, orientation, and duration of the local immune response through the expression of chemokines, costimulatory or protolerogenic factors...
May 20, 2017: Clinical Reviews in Allergy & Immunology
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