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https://www.readbyqxmd.com/read/27903798/lubac-modulates-lmp1-activation-of-nf%C3%AE%C2%BAb-and-irf7
#1
Ling Wang, Yujia Wang, Juan Zhao, Junping Ren, Kenton H Hall, Jonathan P Moorman, Zhi Q Yao, Shunbin Ning
: Recently, Linear Ubiquitin Assembly Complex (LUBAC)-mediated linear ubiquitination has come into focus due to its emerging role in activation of NFκB in different biological contexts. However, the role of LUBAC in LMP1 signaling leading to NFκB and IRF7 activation has not been investigated. We have shown here that RNF31, the key component of LUBAC complex, interacts with LMP1 and IRF7 in EBV-transformed cells, and that LUBAC stimualtes linear ubiquitination of NEMO and IRF7. Consequently, LUBAC is required for LMP1 signaling to full activation of NFκB, but inhibits LMP1-stimulated IRF7 transcriptional activity...
November 30, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27864558/prospective-study-of-the-innate-cellular-immune-response-in-low-vaccine-responder-children
#2
Naveen Surendran, Ted Nicolosi, Ravinder Kaur, Matthew Morris, Michael Pichichero
We recently reported our findings from a longitudinal, prospective study where we identified 10% infants who were low vaccine responders (LVR) at age 9-12 mo following routine primary series vaccine schedule. We found multiple cellular deficiencies in LVR children, including low number of memory B cells, reduced polyclonal stimulation of naïve/memory T cell response and suboptimal APC response. These children outgrew their poor vaccine response by the time they received booster doses of vaccine. Studies in human infant innate immunity are rare because of the unique challenges in specimen collection...
November 18, 2016: Innate Immunity
https://www.readbyqxmd.com/read/27847343/fish-trim32-functions-as-a-critical-antiviral-molecule-against-iridovirus-and-nodavirus
#3
Yepin Yu, Xiaohong Huang, Jiaxin Liu, Jingcheng Zhang, Yin Hu, Ying Yang, Youhua Huang, Qiwei Qin
Tripartite motif-containing 32 (TRIM32) has been demonstrated to pay vital roles in cancer, genetic disorders and antiviral immunity. However, the molecular functions of fish TRIM32 still remained largely unknown. Here, a novel TRIM32 gene from orange spotted grouper (EcTRIM32) was cloned and characterized. EcTRIM32 encoded a 685-aa protein which showed 93%, and 60% identity to large yellow croaker (Larimichthys crocea) and human (Homo sapiens), respectively. Amino acid alignment showed that EcTRIM32 contained a conserved RING-finger domain, a BBOX domain and NHL domain...
November 12, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27822537/a-simple-screening-approach-to-prioritize-genes-for-functional-analysis-identifies-a-role-for-interferon-regulatory-factor-7-in-the-control-of-respiratory-syncytial-virus-disease
#4
Jacqueline U McDonald, Myrsini Kaforou, Simon Clare, Christine Hale, Maria Ivanova, Derek Huntley, Marcus Dorner, Victoria J Wright, Michael Levin, Federico Martinon-Torres, Jethro A Herberg, John S Tregoning
Greater understanding of the functions of host gene products in response to infection is required. While many of these genes enable pathogen clearance, some enhance pathogen growth or contribute to disease symptoms. Many studies have profiled transcriptomic and proteomic responses to infection, generating large data sets, but selecting targets for further study is challenging. Here we propose a novel data-mining approach combining multiple heterogeneous data sets to prioritize genes for further study by using respiratory syncytial virus (RSV) infection as a model pathogen with a significant health care impact...
May 2016: MSystems
https://www.readbyqxmd.com/read/27815423/zebrafish-foxo3b-negatively-regulates-antiviral-response-through-suppressing-the-transactivity-of-irf3-and-irf7
#5
Xing Liu, Xiaolian Cai, Dawei Zhang, Chenxi Xu, Wuhan Xiao
Forkhead box O (FOXO)3, a member of the FOXO family of transcription factors, plays key roles in various cellular processes, including development, longevity, reproduction, and metabolism. Recently, FOXO3 has also been shown to be involved in modulating the immune response. However, how FOXO3 regulates immunity and the underlying mechanisms are still largely unknown. In this study, we show that zebrafish (Danio rerio) foxo3b, an ortholog of mammalian FOXO3, is induced by polyinosinic-polycytidylic acid stimulation and spring viremia of carp virus (SVCV) infection...
December 15, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27815200/fish-trim16l-exerts-negative-regulation-on-antiviral-immune-response-against-grouper-iridoviruses
#6
Yepin Yu, Xiaohong Huang, Jingcheng Zhang, Jiaxi Liu, Yin Hu, Ying Yang, Jia Cai, Youhua Huang, Qiwei Qin
Tripartite motif 16 (TRIM16), has been demonstrated to act as a tumor suppressor through affecting cell proliferation and migration or tumorigenicity in carcigenesis. However, the roles of TRIM16 in immune response were unknown up to now. Here, we cloned a TRIM16-like gene (TRIM16L) from orange spotted grouper (EcTRIM16L) and investigated its roles in response to virus infection. EcTRIM16L encoded a 478 amino acid peptide which showed 72% and 29% identity to large yellow croaker (Larimichthys crocea) and human (Homo sapiens), respectively...
December 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27811478/deletion-of-irf3-and-irf7-genes-in-mice-results-in-altered-interferon-pathway-activation-and-granulocyte-dominated-inflammatory-responses-to-influenza-a-infection
#7
Bastian Hatesuer, Hang Thi Thu Hoang, Peggy Riese, Stephanie Trittel, Ingo Gerhauser, Husni Elbahesh, Robert Geffers, Esther Wilk, Klaus Schughart
The interferon (IFN) pathway plays an essential role in the innate immune response following viral infections and subsequent shaping of adaptive immunity. Infections with influenza A viruses (IAV) activate the IFN pathway after the recognition of pathogen-specific molecular patterns by respective pattern recognition receptors. The IFN regulatory factors IRF3 and IRF7 are key players in the regulation of type I and III IFN genes. In this study, we analyzed the role of IRF3 and IRF7 for the host response to IAV infections in Irf3-/-, Irf7-/-, and Irf3-/-Irf7-/- knockout mice...
November 4, 2016: Journal of Innate Immunity
https://www.readbyqxmd.com/read/27793594/cross-regulation-of-two-type-i-interferon-signaling-pathways-in-plasmacytoid-dendritic-cells-controls-anti-malaria-immunity-and-host-mortality
#8
Xiao Yu, Baowei Cai, Mingjun Wang, Peng Tan, Xilai Ding, Jian Wu, Jian Li, Qingtian Li, Pinghua Liu, Changsheng Xing, Helen Y Wang, Xin-Zhuan Su, Rong-Fu Wang
Type I interferon (IFN) is critical for controlling pathogen infection; however, its regulatory mechanisms in plasmacytoid cells (pDCs) still remain unclear. Here, we have shown that nucleic acid sensors cGAS-, STING-, MDA5-, MAVS-, or transcription factor IRF3-deficient mice produced high amounts of type I IFN-α and IFN-β (IFN-α/β) in the serum and were resistant to lethal plasmodium yoelii YM infection. Robust IFN-α/β production was abolished when gene encoding nucleic acid sensor TLR7, signaling adaptor MyD88, or transcription factor IRF7 was ablated or pDCs were depleted...
November 15, 2016: Immunity
https://www.readbyqxmd.com/read/27763806/rnaseq-reveals-hypervirulence-specific-host-responses-to-m-tuberculosis-infection
#9
Gina Leisching, Ray-Dean Pietersen, Carel van Heerden, Paul van Helden, Ian Wiid, Bienyameen Baker
The distinguishing factors that characterize the host response to infection with virulent Mycobacterium tuberculosis (M.tb) are largely confounding. We present an infection study with two genetically closely related M.tb strains that have vastly different pathogenic characteristics. The early host response to infection with these detergent-free cultured strains was analysed through RNAseq in an attempt to provide information on the subtleties which may ultimately contribute to the virulent phenotype. Murine bone marrow derived macrophages (BMDMs) were infected with either a hyper- (R5527) or hypovirulent (R1507) Beijing M...
October 20, 2016: Virulence
https://www.readbyqxmd.com/read/27733217/overexpression-of-interferon-regulatory-factor-7-irf7-reduces-bone-metastasis-of-prostate-cancer-cells-in-mice
#10
Yang Zhao, Wenxia Chen, Weiliang Zhu, Hui Meng, Jie Chen, Jian Zhang
The purpose of this study was to identify the role of interferon regulatory factor 7 (IRF7) in the bone metastasis of prostate cancer. Herein, we demonstrated the lower expression of IRF7 in bone metastases of prostate cancer. Overexpression of IRF7 in prostate cancer cells had a marked effect on inhibiting bone metastases but not on tumor growth in xenograft nude mice. While in vitro, up-regulation of IRF7 had little effect on the malignant phenotype of prostate cancer cells including proliferation, apoptosis, migration, and invasion...
October 11, 2016: Oncology Research
https://www.readbyqxmd.com/read/27697837/nfatc3-promotes-irf7-transcriptional-activity-in-plasmacy-toid-dendritic-cells
#11
Musheng Bao, York Wang, Ying Liu, Peiqing Shi, Hongbo Lu, Wenwen Sha, Leiyun Weng, Shino Hanabuchi, Jun Qin, Joel Plumas, Laurence Chaperot, Zhiqiang Zhang, Yong-Jun Liu
Plasmacytoid dendritic cells (pDCs) rapidly produce large amounts of type 1 interferon (IFN) after Toll-like receptor 7 and 9 engagements. This specialized function of type 1 IFN production is directly linked to the constitutive expression of IRF7, the master transcription factor for type 1 IFN production. However, the IRF7 regulatory network in pDCs remains largely unknown. In this study, we identify that the transcription factor NFATC3 specifically binds to IRF7 and enhances IRF7-mediated IFN production. Furthermore, knockout of NFATC3 greatly reduced the CpG DNA-induced nuclear translocation of IRF7, which resulted in impaired type 1 IFN production in vitro and in vivo...
October 17, 2016: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/27688705/lps-induced-expression-of-cd14-in-the-trif-pathway-is-epigenetically-regulated-by-sulforaphane-in-porcine-pulmonary-alveolar-macrophages
#12
Qin Yang, Maren J Pröll, Dessie Salilew-Wondim, Rui Zhang, Dawit Tesfaye, Huitao Fan, Mehmet U Cinar, Christine Große-Brinkhaus, Ernst Tholen, Mohammad A Islam, Michael Hölker, Karl Schellander, Muhammad J Uddin, Christiane Neuhoff
Pulmonary alveolar macrophages (AMs) are important in defense against bacterial lung inflammation. Cluster of differentiation 14 (CD14) is involved in recognizing bacterial lipopolysaccharide (LPS) through MyD88-dependent and TRIF pathways of innate immunity. Sulforaphane (SFN) shows anti-inflammatory activity and suppresses DNA methylation. To identify CD14 epigenetic changes by SFN in the LPS-induced TRIF pathway, an AMs model was investigated in vitro CD14 gene expression was induced by 5 µg/ml LPS at the time point of 12 h and suppressed by 5 µM SFN...
September 29, 2016: Innate Immunity
https://www.readbyqxmd.com/read/27677680/expression-and-functional-characterization-of-interferon-regulatory-factors-irf2-irf7-and-irf9-in-the-blunt-snout-bream-megalobrama-amblycephala
#13
Fan-Bin Zhan, Han Liu, Rui-Fang Lai, Ivan Jakovlić, Wei-Min Wang
Interferon regulatory factors (irfs) are a family of genes that encode transcription factors with important roles in regulating the expression of Type I interferons (IFNs) and other genes associated with related pathways. irfs have multitudinous functions in growth, development and regulation of oncogenesis. In this study, three irf family members (irf2, irf7, irf9) were identified and characterized in Megalobrama amblycephala at the mRNA and amino acid levels. M. amblycephala irfs share a high sequence homology with other vertebrate irfs...
February 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/27667736/impaired-virus-replication-and-decreased-innate-immune-responses-to-viral-infections-in-nasal-epithelial-cells-from-patients-with-allergic-rhinitis
#14
A Głobińska, M Pawełczyk, A Piechota-Polańczyk, A Olszewska-Ziąber, S Moskwa, A Mikołajczyk, A Jabłońska, P Zakrzewski, M Brauncajs, M Jarzębska, S Taka, N G Papadopoulos, M L Kowalski
PURPOSE: The aim of the study was to assess the immune response to parainfluenza virus type 3 (PIV3), rhinovirus 1B (RV1B) and intracellular Toll-like receptors (TLR) agonists in nasal epithelial cells (NECs) from patients with allergic rhinitis and healthy controls. METHODS: NECs were obtained from 8 patients with allergic rhinitis (AR) and 11 non-atopic healthy controls (HC) by nasal scraping, grown to confluence and exposed to PIV3, RV1B infection or TLR3 and TLR7/8 agonists...
September 26, 2016: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/27656183/identification-of-two-subgroups-of-type-i-ifns-in-perciforme-fish-large-yellow-croaker-larimichthys-crocea-provides-novel-insights-into-function-and-regulation-of-fish-type-i-ifns
#15
Yang Ding, Jingqun Ao, Xiaohong Huang, Xinhua Chen
Like mammals, fish possess an interferon regulatory factor (IRF) 3/IRF7-dependent type I IFN responses, but the exact mechanism by which IRF3/IRF7 regulate the type I IFNs remains largely unknown. In this study, we identified two type I IFNs in the Perciforme fish large yellow croaker Larimichthys crocea, one of which belongs to the fish IFNd subgroup and the other is assigned to a novel subgroup of group I IFNs in fish, tentatively termed IFNh. The two IFN genes are constitutively expressed in all examined tissues, but with varied expression levels...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27630164/transcriptional-repression-of-ifn-regulatory-factor-7-by-myc-is-critical-for-type-i-ifn-production-in-human-plasmacytoid-dendritic-cells
#16
Tae Whan Kim, Seunghee Hong, Yin Lin, Elise Murat, HyeMee Joo, Taeil Kim, Virginia Pascual, Yong-Jun Liu
Type I IFNs are crucial mediators of human innate and adaptive immunity and are massively produced from plasmacytoid dendritic cells (pDCs). IFN regulatory factor (IRF)7 is a critical regulator of type I IFN production when pathogens are detected by TLR 7/9 in pDC. However, hyperactivation of pDC can cause life-threatening autoimmune diseases. To avoid the deleterious effects of aberrant pDC activation, tight regulation of IRF7 is required. Nonetheless, the detailed mechanisms of how IRF7 transcription is regulated in pDC are still elusive...
October 15, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27606466/raidd-mediates-tlr3-and-irf7-driven-type-i-interferon-production
#17
Sathish Kumar Maney, Haifeng C Xu, Jun Huang, Aleksandra A Pandyra, Christian Ehlting, Renan Aguilar-Valenzuela, Vitaly I Pozdeev, David R McIlwain, Albert Zimmermann, Johannes G Bode, Hartmut Hengel, Carsten J Kirschning, Ira R Kim, John Hiscott, Dirk Brenner, Dieter Häussinger, Pamela S Ohashi, Tak W Mak, Karl S Lang, Philipp A Lang
BACKGROUND/AIMS: Viral infections represent a global health problem with the need for new viral therapies and better understanding of the immune response during infection. The most immediate and potent anti-viral defense mechanism is the production of type I interferon (IFN-I) which are activated rapidly following recognition of viral infection by host pathogen recognition receptors (PRR). The mechanisms of innate cellular signaling downstream of PRR activation remain to be fully understood...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27565347/vaginal-exposure-to-zika-virus-during-pregnancy-leads-to-fetal-brain-infection
#18
Laura J Yockey, Luis Varela, Tasfia Rakib, William Khoury-Hanold, Susan L Fink, Bernardo Stutz, Klara Szigeti-Buck, Anthony Van den Pol, Brett D Lindenbach, Tamas L Horvath, Akiko Iwasaki
Zika virus (ZIKV) can be transmitted sexually between humans. However, it is unknown whether ZIKV replicates in the vagina and impacts the unborn fetus. Here, we establish a mouse model of vaginal ZIKV infection and demonstrate that, unlike other routes, ZIKV replicates within the genital mucosa even in wild-type (WT) mice. Mice lacking RNA sensors or transcription factors IRF3 and IRF7 resulted in higher levels of local viral replication. Furthermore, mice lacking the type I interferon (IFN) receptor (IFNAR) became viremic and died of infection after a high-dose vaginal ZIKV challenge...
August 25, 2016: Cell
https://www.readbyqxmd.com/read/27527596/essential-requirement-for-ifn-regulatory-factor-7-in-autoantibody-production-but-not-development-of-nephritis-in-murine-lupus
#19
Fumi Miyagawa, Yutaka Tagaya, Keiko Ozato, Hideo Asada
Systemic lupus erythematosus (SLE) is a prototypic systemic autoimmune disease characterized by the production of autoantibodies against nuclear components. Recent genetic studies of SLE patients have revealed that IFN regulatory factor (IRF) 7 gene polymorphisms are associated with an increased risk of SLE, but the precise role of IRF7 in SLE development is not fully understood. We investigated the role of IRF7 in the pathogenesis of SLE using a mouse model and saw a curious dissociation of autoantibody production and development of glomerulonephritis...
September 15, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27496972/zebrafish-irf1-irf3-and-irf7-differentially-regulate-ifn%C3%AE-1-and-ifn%C3%AE-3-expression-through-assembly-of-homo-or-heteroprotein-complexes
#20
Hui Feng, Qi-Min Zhang, Yi-Bing Zhang, Zhi Li, Jun Zhang, Ya-Wei Xiong, Min Wu, Jian-Fang Gui
In mammals, IFN regulatory factor (IRF)1, IRF3, and IRF7 are three critical transcription factors that are pivotal for cooperative regulation of the type I IFN response. In this study, we explored the relative contribution of zebrafish (Danio rerio) IRF1 (DrIRF1), IRF3 (DrIRF3), and IRF7 (DrIRF7) (DrIRF1/3/7) to zebrafish IFNΦ1 (DrIFNΦ1) and IFNΦ3 (DrIFNΦ3) (DrIFNΦ1/3) activation. Following spring viremia of carp virus infection, DrIFNΦ1/3 and DrIRF1/3/7 transcripts are significantly induced in zebrafish tissues, which correlates with the replication of spring viremia of carp virus...
September 1, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
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