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type I interferon

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https://www.readbyqxmd.com/read/28318807/microrna-302d-targets-irf9-to-regulate-the-ifn-induced-gene-expression-in-sle
#1
Siobhán Smith, Thilini Fernando, Pei Wen Wu, Jane Seo, Joan Ní Gabhann, Olga Piskareva, Eoghan McCarthy, Donough Howard, Paul O'Connell, Richard Conway, Phil Gallagher, Eamonn Molloy, Raymond L Stallings, Grainne Kearns, Lindsy Forbess, Mariko Ishimori, Swamy Venuturupalli, Daniel Wallace, Michael Weisman, Caroline A Jefferies
Systemic lupus erythematosus (SLE) is a complex disease targeting multiple organs as a result of overactivation of the type I interferon (IFN) system, a feature currently being targeted by multiple biologic therapies against IFN-α. We have identified an estrogen-regulated microRNA, miR-302d, whose expression is decreased in SLE patient monocytes and identify its target as interferon regulatory factor (IRF)-9, a critical component of the transcriptional complex that regulates expression of interferon-stimulated genes (ISGs)...
March 17, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28317911/chimeric-viruses-between-rocio-and-west-nile-the-role-for-rocio-prm-e-proteins-in-virulence-and-inhibition-of-interferon-%C3%AE-%C3%AE-signaling
#2
Alberto A Amarilla, Yin X Setoh, Parthiban Periasamy, Nias Y Peng, Gabor Pali, Luiz T Figueiredo, Alexander A Khromykh, Victor H Aquino
Mosquito-transmitted flavivirus Rocio (ROCV) was responsible for an outbreak of encephalitis in the Ribeira Valley, located in the south coast of Sao Paulo State, Brazil, in 1975-1976. ROCV also causes fatal encephalitis in adult mice. Seroprevalence studies in humans, horses and water buffaloes in different regions of Brazil have suggested that ROCV is still circulating in the country, indicating the risk of re-emergence of this virus. West Nile virus (WNV) is also a mosquito-transmitted encephalitic flavivirus, however, WNV strains circulating in Australia have not been associated with outbreaks of disease in humans and exhibit low virulence in adult mice...
March 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28315707/combined-administration-of-synthetic-rna-and-a-conventional-vaccine-improves-immune-responses-and-protection-against-foot-and-mouth-disease-virus-in-swine
#3
Belén Borrego, Esther Blanco, Miguel Rodríguez Pulido, Francisco Mateos, Gema Lorenzo, Sabrina Cardillo, Eliana Smitsaart, Francisco Sobrino, Margarita Sáiz
Foot-and-mouth disease virus (FMDV) is the causative agent of a highly contagious disease and a major concern in animal health worldwide. We have previously reported the use of RNA transcripts mimicking structural domains in the non-coding regions of the FMDV RNA as potent type-I interferon (IFN) inducers showing antiviral effect in vivo, as well as their immunomodulatory properties in combination with an FMD vaccine in mice. Here, we describe the enhancing effect of RNA delivery on the immunogenicity and protection induced by a suboptimal dose of a conventional FMD vaccine in pigs...
March 15, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28314590/inflammasome-activation-triggers-caspase-1-mediated-cleavage-of-cgas-to-regulate-responses-to-dna-virus-infection
#4
Yutao Wang, Xiaohan Ning, Pengfei Gao, Shuxian Wu, Mengyin Sha, Mengze Lv, Xiang Zhou, Juyi Gao, Run Fang, Guangxun Meng, Xiaodong Su, Zhengfan Jiang
Viral infection triggers host innate immune responses that result in the production of various cytokines including type I interferons (IFN), activation of inflammasomes, and programmed cell death of the infected cells. Tight control of inflammatory cytokine production is crucial for the triggering of an effective immune response that can resolve the infection without causing host pathology. In examining the inflammatory response of Asc(-/-) and Casp1(-/-) macrophages, we found that deficiency in these molecules resulted in increased IFN production upon DNA virus infection, but not RNA virus challenge...
March 8, 2017: Immunity
https://www.readbyqxmd.com/read/28303157/tangshen-formula-attenuates-colonic-structure-remodeling-in-type-2-diabetic-rats
#5
Pengmin Chen, Jingbo Zhao, Haojun Zhang, Xin Yang, Tingting Zhao, Huicun Zhang, Meihua Yan, Lin Pan, Xin Li, Yun Zhang, Ping Li
Aim. This study investigated the effect and mechanism of the Chinese herbal medicine Tangshen Formula (TSF) on GI structure remodeling in the rat model of diabetes. Methods. Type 2 diabetic rats were used. Wet weight per unit length, layer thicknesses, levels of collagens I and III, nuclear factor kappa B (NF-κB), interferon-γ (IFN-γ), interleukin-6 (IL-6), transforming growth factor-β1 (TGF-β1), and Smad2/3 expression in the rat colon were measured. Results. Compared with the control group animals, wet weight and layer thicknesses of the colon increased, and expressions of collagens I and III, NF-κB, IFN-γ, IL-6, TGF-β1, and Smad2/3 increased significantly in the diabetic animals...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28303139/evolution-of-interferons-and-interferon-receptors
#6
REVIEW
Chris J Secombes, Jun Zou
The earliest jawed vertebrates (Gnathostomes) would likely have had interferon (IFN) genes, since they are present in extant cartilaginous fish (sharks and rays) and bony fish (lobe-finned and ray-finned fish, the latter consisting of the chondrostei, holostei, and teleostei), as well as in tetrapods. They are thought to have evolved from a class II helical cytokine ancestor, along with the interleukin (IL)-10 cytokine family. The two rounds of whole genome duplication (WGD) that occurred between invertebrates and vertebrates (1) may have given rise to additional loci, initially containing an IL-10 ancestor and IFN ancestor, which have duplicated further to give rise to the two loci containing the IL-10 family genes, and potentially the IFN type I and IFN type III loci (2)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28300196/recombinant-mycobacterium-smegmatis-with-a-pmyong2-vector-expressing-human-immunodeficiency-virus-type-i-gag-can-induce-enhanced-virus-specific-immune-responses
#7
Byoung-Jun Kim, Jeong-Ryeol Gong, Ga-Na Kim, Bo-Ram Kim, So-Young Lee, Yoon-Hoh Kook, Bum-Joon Kim
Recently, we have developed a novel Mycobacterium-Escherichia coli shuttle vector system using pMyong2, which can provide an enhanced expression of heterologous genes in recombinant Mycobacterium smegmatis (rSmeg). To investigate the usefulness of rSmeg using pMyong2 in vaccine application, we vaccinated M. smegmatis with pMyong2 system expressing Human Immunodeficiency Virus Type I (HIV-1) Gag p24 antigen (rSmeg-pMyong2-p24) into mice and examined its cellular and humoral immune responses against HIV gag protein...
March 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28297747/enterococcus-faecium-fc-k-derived-from-kimchi-is-a-probiotc-lactic-acid-bacteria-that-shows-anti-allergic-activity
#8
Man-Kwang Rho, Young-Eun Kim, Hyun-In Rho, Tae-Rahk Kim, Yoon-Bum Kim, Won-Kyung Sung, Taw-Woo Kim, Dae-Ok Kim, Hee Kang
A rise in the occurrence of allergic diseases is attributed to the dysregulated balance of type 1/type 2 immunity, where type 2 T helper (Th2) cells predominate over type 1 T helper (Th1) cells, leading to an abnormally increased production of IgE in response to unharmful antigens. Kimchi, a traditional Korean fermented food, is a rich source of beneficial lactic acid bacteria. In this study, we investigated the ability of Enterococcus faecium FC-K derived from kimchi to induce type I immunity in the presence of Th2 polarizing conditions in vitro and in vivo...
March 15, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28297677/recombinant-bcg-expressing-esx-1-of-mycobacterium-marinum-combines-low-virulence-with-cytosolic-immune-signaling-and-improved-tb-protection
#9
Matthias I Gröschel, Fadel Sayes, Sung Jae Shin, Wafa Frigui, Alexandre Pawlik, Mickael Orgeur, Robin Canetti, Nadine Honoré, Roxane Simeone, Tjip S van der Werf, Wilbert Bitter, Sang-Nae Cho, Laleh Majlessi, Roland Brosch
Recent insights into the mechanisms by which Mycobacterium tuberculosis, the etiologic agent of human tuberculosis, is recognized by cytosolic nucleotide sensors have opened new avenues for rational vaccine design. The only licensed anti-tuberculosis vaccine, Mycobacterium bovis BCG, provides limited protection. A feature of BCG is the partial deletion of the ESX-1 type VII secretion system, which governs phagosomal rupture and cytosolic pattern recognition, key intracellular phenotypes linked to increased immune signaling...
March 14, 2017: Cell Reports
https://www.readbyqxmd.com/read/28295835/type-i-interferons-modulate-methotrexate-resistance-in-gestational-trophoblastic-neoplasia
#10
Kevin M Elias, Richard A Harvey, Kathleen T Hasselblatt, Michael J Seckl, Ross S Berkowitz
PROBLEM: Resistance to methotrexate is a leading clinical problem in gestational trophoblastic neoplasia (GTN), but there are limited laboratory models for this condition. METHOD OF STUDY: We created isogenic trophoblastic cell lines resistant to methotrexate and compared these to the parent cell lines using gene expression microarrays and qRT-PCR followed by mechanistic studies using recombinant cytokines, pathway inhibitors, and patient sera. RESULTS: Gene expression microarrays and focused analysis by qRT-PCR revealed methotrexate led to type I interferon upregulation, in particular interferon alpha 2 (IFNA2), and methotrexate resistance was associated with chronic low level increases in type I interferon expression...
March 14, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28295214/negative-regulators-of-the-rig-i-like-receptor-signaling-pathway
#11
REVIEW
Kendra M Quicke, Michael S Diamond, Mehul S Suthar
Upon recognition of specific molecular patterns on microbes, host cells trigger an innate immune response, which culminates in the production of type I interferons (IFNs), pro-inflammatory cytokines and chemokines, and restricts pathogen replication and spread within the host. At each stage of this response, there are stimulatory and inhibitory signals that regulate the magnitude, quality, and character of the response. Positive regulation promotes an antiviral state to control and eventually clear infection, whereas negative regulation dampens inflammation and prevents immune-mediated tissue damage...
March 10, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28289719/type-i-interferons-regulate-susceptibility-to-inflammation-induced-preterm-birth
#12
Monica Cappelletti, Pietro Presicce, Matthew J Lawson, Vandana Chaturvedi, Traci E Stankiewicz, Simone Vanoni, Isaac T W Harley, Jaclyn W McAlees, Daniel A Giles, Maria E Moreno-Fernandez, Cesar M Rueda, Paranth Senthamaraikannan, Xiaofei Sun, Rebekah Karns, Kasper Hoebe, Edith M Janssen, Christopher L Karp, David A Hildeman, Simon P Hogan, Suhas G Kallapur, Claire A Chougnet, Sing Sing Way, Senad Divanovic
Preterm birth (PTB) is a leading worldwide cause of morbidity and mortality in infants. Maternal inflammation induced by microbial infection is a critical predisposing factor for PTB. However, biological processes associated with competency of pathogens, including viruses, to induce PTB or sensitize for secondary bacterial infection-driven PTB are unknown. We show that pathogen/pathogen-associated molecular pattern-driven activation of type I IFN/IFN receptor (IFNAR) was sufficient to prime for systemic and uterine proinflammatory chemokine and cytokine production and induction of PTB...
March 9, 2017: JCI Insight
https://www.readbyqxmd.com/read/28289098/molecular-mechanisms-governing-differential-type-i-interferons-signaling
#13
Gideon Schreiber
Type I interferons (IFN-I) are cytokines that affect the expression of thousands of genes, resulting in profound cellular changes. IFN-I activates the cell by dimerizing its two-receptor chains, IFNAR1 and IFNAR2, which are expressed on all nucleated cells. Despite a similar mode of binding, the different IFN-Is activate a variety of outcomes. The causes for differential activation may stem from differences in IFN-I binding affinity, duration of binding, number of surface receptors, induction of feedback loops and cell-type specific variations...
March 13, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28289095/contribution-of-type-iii-interferons-to-antiviral-immunity-location-location-location
#14
Sergei V Kotenko, Joan E Durbin
Type I interferons (IFN-α/β) and the more recently identified type III IFNs (IFN-λ) function as the first line of defense against virus infection, and regulate the development of both innate and adaptive immune responses. Type III IFNs were originally identified as a novel ligand-receptor system acting in parallel with type I IFNs, but subsequent studies have provided increasing evidence for distinct roles for each IFN family. In addition to their compartmentalized antiviral actions, these two systems appear to have multiple levels of cross-regulation, and act coordinately to achieve effective anti-microbial protection with minimal collateral damage to the host...
March 13, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28288457/interferon-dependent-induction-of-clr-b-during-mouse-cytomegalovirus-infection-protects-bystander-cells-from-natural-killer-cells-via-nkr-p1b-mediated-inhibition
#15
Christina L Kirkham, Oscar A Aguilar, Tao Yu, Miho Tanaka, Aruz Mesci, Kuan-Lun Chu, Jason H Fine, Karen L Mossman, Rod Bremner, David S J Allan, James R Carlyle
Natural killer (NK) cells are innate lymphocytes that aid in self-nonself discrimination by recognizing cells undergoing pathological alterations. The NKR-P1B inhibitory receptor recognizes Clr-b, a self-encoded marker of cell health downregulated during viral infection. Here, we show that Clr-b loss during mouse cytomegalovirus (MCMV) infection is predicated by a loss of Clr-b (Clec2d) promoter activity and nascent transcripts, driven in part by MCMV ie3 (M122) activity. In contrast, uninfected bystander cells near MCMV-infected fibroblasts reciprocally upregulate Clr-b expression due to paracrine type-I interferon (IFN) signaling...
March 14, 2017: Journal of Innate Immunity
https://www.readbyqxmd.com/read/28287082/e3-ligase-fbxw7-is-critical-for-rig-i-stabilization-during-antiviral-responses
#16
Yinjing Song, Lihua Lai, Zhenlu Chong, Jia He, Yuanyuan Zhang, Yue Xue, Yiwei Xie, Songchang Chen, Ping Dong, Luoquan Chen, Zhimin Chen, Feng Dai, Xiaopeng Wan, Peng Xiao, Xuetao Cao, Yang Liu, Qingqing Wang
Viruses can escape from host recognition by degradation of RIG-I or interference with the RIG-I signalling to establish persistent infections. However, the mechanisms by which host cells stabilize RIG-I protein for avoiding its degradation are largely unknown. We report here that, upon virus infection, the E3 ubiquitin ligase FBXW7 translocates from the nucleus into the cytoplasm and stabilizes RIG-I. FBXW7 interacts with SHP2 and mediates the degradation and ubiquitination of SHP2, thus disrupting the SHP2/c-Cbl complex, which mediates RIG-I degradation...
March 13, 2017: Nature Communications
https://www.readbyqxmd.com/read/28286505/mda5-induces-a-stronger-interferon-response-than-rig-i-to-gcrv-infection-through-a-mechanism-involving-the-phosphorylation-and-dimerization-of-irf3-and-irf7-in-cik-cells
#17
Quanyuan Wan, Chunrong Yang, Youliang Rao, Zhiwei Liao, Jianguo Su
Retinoic acid-inducible gene I (RIG-I) and melanoma differentiation-associated gene 5 (MDA5) are critical cytosolic sensors that trigger the production of interferons (IFNs). Though their recognition functions are well identified, their unique roles in the downstream signal transduction remain to be elucidated. Herein, we report the differential effect between grass carp (Ctenopharyngodon idella) MDA5 (CiMDA5) and CiRIG-I on the production of various IFNs upon grass carp reovirus (GCRV) infection in C. idella kidney (CIK) cell line...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28286234/cellular-protein-gltscr2-a-valuable-target-for-the-development-of-broad-spectrum-antivirals
#18
Cui-Cui Li, Hui-Jun Dong, Peng Wang, Wen Meng, Xiao-Jing Chi, Shi-Chong Han, Shuo Ning, Chuang Wang, Xiao-Jia Wang
Viral infection induces translocation of the nucleolar protein GLTSCR2 from the nucleus to the cytoplasm, resulting in attenuation of the type I interferon IFN-β. Addressing the role of GLTSCR2 in viral replication, we detect that knocking down GLTSCR2 by shRNAs results in significant suppression of viral replication in mammalian and chicken cells. Injection of chicken embryo with the GLTSCR2-specific shRNA-1370 simultaneously or 24 h prior to infection with Newcastle disease virus (NDV) substantially reduces viral replication in chicken embryo fibroblasts...
March 7, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28285909/interferon-i-the-pi%C3%A3-ce-de-r%C3%A3-sistance-of-hiv-1-transmission
#19
Damien C Tully, Daniel T Claiborne, Todd M Allen
Despite the extensive viral quasispecies that develops in an individual during the course of HIV-1 infection, transmission is typically established by a single donor viral variant. Recent studies now provide insight into the phenotypic properties influencing this selection process at transmission, including the contribution of resistance to type I interferons.
March 9, 2017: Trends in Microbiology
https://www.readbyqxmd.com/read/28284594/orally-administered-live-attenuated-salmonella-typhimurium-protects-mice-against-lethal-infection-with-h1n1-influenza-virus
#20
Nitin Machindra Kamble, Irshad Ahmed Hajam, John Hwa Lee
Pre-stimulation of toll-like receptors (TLRs) by agonists has been shown to increase protection against influenza virus infection. In this study, we evaluated the protective response generated against influenza A/Puerto Rico/8/1934 (PR8; H1N1) virus by oral and nasal administration of live attenuated Salmonella enterica serovar Typhimurium, JOL911 strain, in mice. Oral and nasal inoculation of JOL911 significantly increased the mRNA copy number of TLR-2, TLR4 and TLR5, and downstream type I interferon (IFN) molecules, IFN-α and IFN-β, both in peripheral blood mononuclear cells (PBMCs) and in lung tissue...
March 2017: Veterinary Microbiology
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