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Interferon regulatory factor

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https://www.readbyqxmd.com/read/29143896/modulation-of-stimulator-of-interferon-genes-sting-expression-by-interferon-%C3%AE-in-human-keratinocytes
#1
Yohei Nishikawa, Yasushi Matsuzaki, Kazuyuki Kimura, Akiko Rokunohe, Hajime Nakano, Daisuke Sawamura
Infection of microbial pathogen triggers the innate immune system, and the induction of interferons (IFNs) play a vital role in host antiviral response. Stimulator of interferon genes (STING) was identified as a crucial regulator of the DNA sensing pathway, and activates both nuclear factor-κB and interferon regulatory factor 3 transcription pathways to evoke IFNs production. In this study, we studied the upregulation of STING mRNA expression, induced by IFN-γ in human keratinocytes (HaCaT). STING promoter assays clarified that a gamma-activated sequence (GAS), located at - 7 to - 15-bp, is required for IFN-γ-upregulated promoter activity...
November 16, 2017: Biochemical Genetics
https://www.readbyqxmd.com/read/29137229/activation-of-vip-signaling-enhances-immunosuppressive-effect-of-mdscs-on-cmv-induced-adaptive-immunity
#2
Parvin Forghani, Christopher T Petersen, Edmund K Waller
Vasoactive intestinal peptide (VIP) is recognized as a potent anti-inflammatory factor which affects both the innate and adaptive arms of the immune system. These effects include, but are not limited to, inhibition of T cell proliferation and disruption of immune homeostasis. Myeloid-derived suppressor cells (MDSC) are an immune regulatory cell type that has been described in settings of cancer and infectious disease._Here we demonstrate a reduced circulating monocytic MDSCs in the VIP (-/-)vs. wild type MCMV...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29136005/a-17-molecule-set-as-a-predictor-of-complete-response-to-neoadjuvant-chemotherapy-with-docetaxel-cisplatin-and-5-fluorouracil-in-esophageal-cancer
#3
Hajime Fujishima, Shoichi Fumoto, Tomotaka Shibata, Kohei Nishiki, Yoshiyuki Tsukamoto, Tsuyoshi Etoh, Masatsugu Moriyama, Norio Shiraishi, Masafumi Inomata
BACKGROUND: Recently, neoadjuvant chemotherapy with docetaxel/cisplatin/5-fluorouracil (NAC-DCF) was identified as a novel strong regimen with a high rate of pathological complete response (pCR) in advanced esophageal cancer in Japan. Predicting pCR will contribute to the therapeutic strategy and the prevention of surgical invasion. However, a predictor of pCR after NAC-DCF has not yet been developed. The aim of this study was to identify a novel predictor of pCR in locally advanced esophageal cancer treated with NAC-DCF...
2017: PloS One
https://www.readbyqxmd.com/read/29135372/first-study-on-interferon-regulatory-factor-in-sturgeon-expression-pattern-of-interferon-regulatory-factor-in-dabry-s-sturgeon-acipenser-dabryanus
#4
Youshen Li, Shuhuan Zhang, Kai Luo, Lihai Xia, Wei Hu, Guangming Tian, Zhitao Qi, Qiaoqing Xu, Qiwei Wei
Interferon regulatory factors (IRFs) are crucial regulators in initiating the host innate immune response against pathogen invasions. Dabry's sturgeon (Acipenser dabryanus) is particularly a valuable fish species found in the Yangtze River, China for which there is scarce immunological data. In the present study, we investigated the expression profile of sturgeon IRF genes. All adIRFs were composed of 8 exons and 7 introns, except adIRF1, which possessed 9 exons interrupted by 8 introns. Moreover, the predicted protein sequence has a DNA-binding domain (DBD) sharing high identity with spotted gar (Lepisosteus oculatus)...
November 2017: Journal of Interferon & Cytokine Research
https://www.readbyqxmd.com/read/29132684/interactions-between-lactobacilli-and-chicken-macrophages-induce-antiviral-responses-against-avian-influenza-virus
#5
Bahram Shojadoost, Raveendra R Kulkarni, Jennifer T Brisbin, Wanderley Quinteiro-Filho, Tamiru N Alkie, Shayan Sharif
Macrophages are an important cell type of the innate immune system that upon activation, can exert antiviral functions and also can induce virus-specific adaptive immune responses. Macrophage interaction with certain probiotic bacteria such as lactobacilli can enhance antiviral functions of these cells. We have previously shown that administration of lactobacilli to chickens can effectively augment immune response to vaccine antigens. Here, we investigated the effects of representative strains of three Lactobacillus species, L...
October 31, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/29131464/interferon-regulatory-factor-4-5-signaling-impacts-on-microglial-activation-after-ischemic-stroke-in-mice
#6
Abdullah Al Mamun, Anjali Chauhan, Haifu Yu, Yan Xu, Romana Sharmeen, Fudong Liu
Microglial activation is a key element in initiating and perpetuating inflammatory responses to stroke. Interferon regulatory factor 5 (IRF5) and IRF4 signaling have been found critical in mediating macrophage pro-inflammatory (M1) and anti-inflammatory (M2) phenotypes respectively in peripheral inflammation. We hypothesize that the IRF5/4 regulatory axis also mediates microglial activation after stroke. C57BL6 mice of 8-12 weeks were subject to a 90-minute middle cerebral artery occlusion and the brains evaluated at 24h, 3d, 10d and 30d after reperfusion...
November 13, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29129223/infectious-pancreatic-necrosis-virus-infection-of-fish-cell-lines-preliminary-analysis-of-gene-expressions-related-to-extracellular-matrix-remodeling-and-immunity
#7
Melina Villalba, Valeria Pérez, Laura Herrera, Cristopher Stepke, Nicolas Maldonado, Fernanda Fredericksen, Alejandro Yáñez, Víctor H Olavarría
The pathogenic infectious pancreatic necrosis virus (IPNV) causes high economic losses in fish farming. This virus can modulate several cellular processes during infection, but little is known about the infection mechanism. To investigate gene activation in response to IPNV, CHSE/F and SHK-1 cell line were infected with a cytopathic Sp field isolate of IPNV, and the expression profiles of proinflammatory, antiviral cytokine, and extracellular matrix markers were analyzed. IPNV induced the production of perlecan, fibulin-1, matrix metalloproteinase-2, 14-3-3β, interleukin-1β, Mx1, and interferon regulatory factors-1, -3, and -9...
December 2017: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/29128673/bi-allelic-irf8-mutation-a-complex-immunodeficiency-syndrome-with-dendritic-cell-deficiency-monocytopenia-and-immune-dysregulation
#8
Venetia Bigley, Sheetal Maisuria, Urszula Cytlak, Laura Jardine, Matthew A Care, Kile Green, Merry Gunawan, Paul Milne, Rachel Dickinson, Sarah Wiscombe, David Parry, Rainer Doffinger, Arian Laurence, Claudia Fonseca Lic, Oda Stoevesandt, Andrew Gennery, Andrew Cant, Reuben Tooze, A John Simpson, Sophie Hambleton, Sinisa Savic, Gina Doody, Matthew Collin
BACKGROUND: Homozygous K108E mutation of interferon regulatory factor 8 (IRF8) is reported to cause dendritic cell and monocyte deficiency. However, more widespread immune dysfunction is predicted from the multiple roles ascribed to IRF8 in immune cell development and function. OBJECTIVE: We sought to describe the effect on hematopoiesis and immunity of compound heterozygous R83C/ R291Q mutation of IRF8, present in a patient with recurrent viral infection, granulo-proliferation and intracerebral calcification...
November 8, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29117564/an-irf-3-irf-5-and-irf-7-independent-pathway-of-dengue-viral-resistance-utilizes-irf-1-to-stimulate-type-i-and-ii-interferon-responses
#9
Aaron F Carlin, Emily M Plummer, Edward A Vizcarra, Nicholas Sheets, Yunichel Joo, William Tang, Jeremy Day, Jay Greenbaum, Christopher K Glass, Michael S Diamond, Sujan Shresta
Interferon-regulatory factors (IRFs) are a family of transcription factors (TFs) that translate viral recognition into antiviral responses, including type I interferon (IFN) production. Dengue virus (DENV) and other clinically important flaviviruses are suppressed by type I IFN. While mice lacking the type I IFN receptor (Ifnar1(-/-)) succumb to DENV infection, we found that mice deficient in three transcription factors controlling type I IFN production (Irf3(-/-)Irf5(-/-)Irf7(-/-) triple knockout [TKO]) survive DENV challenge...
November 7, 2017: Cell Reports
https://www.readbyqxmd.com/read/29115498/association-between-genotype-and-phenotype-of-virulence-gene-in-van-der-woude-syndrome-families
#10
Shouxia Li, Xueqiang Zhang, Dingli Chen, Wei Zhao, Xiaofang Zhang, Jianjun Jiao, Lili Guo, Lei Yin, Xuedong Song, Chun Liang, Caixia Sun
Members from two Van der Woude syndrome (VWS) families were screened to determine the prevalence of interferon regulatory factor 6 (IRF6) as a disease‑causing gene and to analyze the interrelationships between patient genotype and phenotype. The peripheral blood of 24 members from two VWS families and 200 control samples were collected. The family members were interviewed for medical histories and other clinical abnormalities using questionnaires. Polymerase chain reaction was directly performed on the peripheral blood to screen for the coding region of the IRF6 gene...
November 6, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29115392/the-inhibition-of-myd88-and-trif-signaling-serve-equivalent-roles-in-attenuating-myocardial-deterioration-due-to-acute-severe-inflammation
#11
Min-Zhi Ouyang, Dan Zhou, Yun Zhu, Ming Zhang, Ling Li
Myeloid differentiation factor 88 (MyD88) and Toll or interleukin-1 receptor-domain-containing adaptor-inducing interferon-β (IFN-β) (TRIF) are two pivotal downstream adaptors of Toll-like receptors. Activation of MyD88 or TRIF signaling in cardiac immune pathology of severe inflammation negatively influences heart function. In the present study, severe septic cardiac injury was induced in C57BL/6 mice by cecum ligation and puncture (CLP). A total of 64 mice were divided randomly into the following four groups (n=16/group; 8 for observation of survival rate, 8 for heart sample analysis): Sham, CLP, anti-MyD88-CLP and anti-TRIF-CLP...
November 7, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29113177/potential-role-of-indoleamine-2-3-dioxygenase-in-primary-biliary-cirrhosis
#12
Kashif Asghar, John Brain, Jeremy M Palmer, Stephen Douglass, Fatmah M A Naemi, Graeme O'Boyle, John Kirby, Simi Ali
Indoleamine 2,3-dioxygenase (IDO)-induced immunosuppression can be clinically beneficial for autoimmune diseases. Primary biliary cirrhosis (PBC) is characterized by autoimmune lesions of intrahepatic bile duct epithelial cells that may lead to irreversible cirrhosis or hepatocellular carcinoma. The present study assessed the expression and function of IDO in a cell culture model and in PBC patients. IDO expression was monitored in a human immortalized but non-malignant biliary epithelial cell (iBEC) line. Increased expression of IDO1/2 was observed in the iBECs following stimulation with interferon-γ (IFN-γ)...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29112686/interferon-regulatory-factor-1-priming-of-tumour-derived-exosomes-enhances-the-antitumour-immune-response
#13
Mu-Qing Yang, Qiang Du, Patrick R Varley, Julie Goswami, Zhihai Liang, Ronghua Wang, Hui Li, Donna B Stolz, David A Geller
BACKGROUND: Tumour-derived exosomes (TEXs) have a potential for application in cancer vaccines. Whether TEXs after induction by interferon regulatory factor 1 (IRF-1) are capable of enhancing the antitumour response remains to be determined. METHODS: Exosomes released by tumour cells infected with IRF-1-expressing adenovirus (IRF-1-Exo) or treated with interferon-γ (IFN-Exo) were isolated via ultracentrifugation. The IRF-1 target proteins IL-15Rα and MHC class I (MHC-I) were analysed by western blot...
November 7, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/29111349/the-developmental-transcription-factor-irf6-attenuates-abcg2-gene-expression-and-distinctively-reverses-stemness-phenotype-in-nasoparyngeal-carcinoma
#14
Liang Xu, Tie-Jun Huang, Hao Hu, Meng-Yao Wang, Si-Mei Shi, Qin Yang, Fen Lin, Yuan-Yuan Qiang, Yan Mei, Yan-Hong Lang, Chang-Zhi Li, Li-Xia Peng, Li-Sheng Zheng, Jia-Ling Huang, Xin-Jian Li, Shi-Jun Zhang, Chao-Nan Qian, Bi-Jun Huang
Nasopharyngeal carcinoma (NPC), which originates from the nasopharynx, is highly prevalent in Southern China and Southeast Asia, and more than 90% of all NPCs are non-keratinizing undifferentiated cells or poorly differentiated squamous cells. Cancer stem cells (CSCs) are capable of self-renewal and have differentiation potential. These properties form the basis of cancer initiation, development, and radiochemoresistance. However, the molecular mechanisms underlying NPC CSC maintenance remain poorly understood...
October 27, 2017: Cancer Letters
https://www.readbyqxmd.com/read/29107934/the-clinical-significance-and-biological-function-of-interferon-regulatory-factor-1-in-cholangiocarcinoma
#15
Peiqi Wan, Junhong Zhang, Qiang Du, David A Geller
Interferon regulatory factor 1 (IRF1) has been suggested to act as a tumor suppressor in human cancers. However, the clinical significance and biological function of IRF1 in cholangiocarcinoma is poorly understood. In our results, IRF1 mRNA and protein expressions were decreased in cholangiocarcinoma tissues and cell lines compared with paired normal hepatic tissues and intrahepatic bile duct epithelial cell line. IRF1 protein low-expression was associated with tumor stage, tumor size, vascular invasion and metastasis and served as a poor independent prognostic parameter in cholangiocarcinoma patients...
November 3, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29106945/activation-of-the-sting-irf3-pathway-promotes-hepatocyte-inflammation-apoptosis-and-induces-metabolic-disorders-in-nonalcoholic-fatty-liver-disease
#16
J T Qiao, C Cui, L Qing, L S Wang, T Y He, F Yan, F Q Liu, Y H Shen, X G Hou, L Chen
BACKGROUND: Nonalcoholic fatty liver disease (NAFLD) is a common result of obesity and metabolic syndrome. Hepatocyte injury and metabolic disorders are hallmarks of NAFLD. Stimulator of interferon genes (STING) and its downstream factor interferon regulatory factor 3 (IRF3) trigger inflammatory reaction in response to the presence of cytosolic DNA. STING has recently been shown to play an important role in early alcoholic liver disease. However, little is known about the role of STING-IRF3 pathway in hepatocyte injury...
October 26, 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29106401/irf3-and-type-i-interferons-fuel-a-fatal-response-to-myocardial-infarction
#17
Kevin R King, Aaron D Aguirre, Yu-Xiang Ye, Yuan Sun, Jason D Roh, Richard P Ng, Rainer H Kohler, Sean P Arlauckas, Yoshiko Iwamoto, Andrej Savol, Ruslan I Sadreyev, Mark Kelly, Timothy P Fitzgibbons, Katherine A Fitzgerald, Timothy Mitchison, Peter Libby, Matthias Nahrendorf, Ralph Weissleder
Interferon regulatory factor 3 (IRF3) and type I interferons (IFNs) protect against infections and cancer, but excessive IRF3 activation and type I IFN production cause autoinflammatory conditions such as Aicardi-Goutières syndrome and STING-associated vasculopathy of infancy (SAVI). Myocardial infarction (MI) elicits inflammation, but the dominant molecular drivers of MI-associated inflammation remain unclear. Here we show that ischemic cell death and uptake of cell debris by macrophages in the heart fuel a fatal response to MI by activating IRF3 and type I IFN production...
November 6, 2017: Nature Medicine
https://www.readbyqxmd.com/read/29102119/rig-1-and-mda-5-signaling-pathways-contribute-to-ifn-%C3%AE-production-and-viral-replication-in-porcine-circovirus-virus-type-2-infected-pk-15-cells-in-vitro
#18
Bei Huang, Jiansheng Li, Xinchen Zhang, Qiling Zhao, Mingqing Lu, Yingjun Lv
Type I Interferons (IFNs) is known for its antiviral activity; however, it is surprising that in vitro treatment of IFN-α and IFN-γ enhanced the replication of porcine circovirus type 2 (PCV2), indicating a complex relationship between interferon and PCV2. To date, it remains poorly understood how the interferon is produced during PCV2 infection and whether the interferon induced by PCV2 itself can promote viral replication. In this study, PCV2 induced the up-regulation of IFN-β in PK-15 cells, while treatment of PCV2-infected cells with the interferon regulatory factor-3 (IRF3) inhibitor, BX795, decreased the expression of IFN-β, whereas treatment with the nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) inhibitor, BAY11-7082, did not...
November 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/29101251/the-methyltransferase-nsd3-promotes-antiviral-innate-immunity-via-direct-lysine-methylation-of-irf3
#19
Chunmei Wang, Qinlan Wang, Xiaoqing Xu, Bin Xie, Yong Zhao, Nan Li, Xuetao Cao
Lysine methylation is an important posttranslational modification, implicated in various biological pathological conditions. The transcription factor interferon regulatory factor 3 (IRF3) is essential for antiviral innate immunity, yet the mechanism for methylation control of IRF3 activation remains unclear. In this paper, we discovered monomethylation of IRF3 at K366 is critical for IRF3 transcription activity in antiviral innate immunity. By mass spectrometry analysis of IRF3-associated proteins, we identified nuclear receptor-binding SET domain 3 (NSD3) as the lysine methyltransferase that directly binds to the IRF3 C-terminal region through its PWWP1 domain and methylates IRF3 at K366 via its SET domain...
November 3, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29100282/up-regulation-of-irf-3-expression-through-gata-1-acetylation-by-histone-deacetylase-inhibitor-in-lung-adenocarcinoma-a549-cells
#20
Lu-Lu Wang, Lan-Bo Zhou, Jin Shu, Nan-Nan Li, Hui-Wen Zhang, Rui Jin, Li-Li Zhuang, Guo-Ping Zhou
Interferon regulatory factor 3 (IRF-3) is an important transcription factor for interferon genes. Although its functional activation by viral infection has been widely explicated, the regulatory mechanism of IRF-3 gene expression in cancer cells is poorly understood. In this study, we demonstrated treatment of lung adenocarcinoma A549 cells with trichostatin A (TSA) and valproic acid (VPA), two different classes of histone deacetylase inhibitors, strongly stimulated IRF-3 gene expression. Truncated and mutated IRF-3 promoter indicated that a specific GATA-1 element was responsible for TSA-induced activation of IRF-3 promoter...
September 29, 2017: Oncotarget
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