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https://www.readbyqxmd.com/read/29717152/chicken-interferon-induced-protein-with-tetratricopeptide-repeats-5-antagonizes-replication-of-rna-viruses
#1
Diwakar Santhakumar, Mohammed Abdel Mohsen Shahaat Rohaim, Hussein A Hussein, Pippa Hawes, Helena Lage Ferreira, Shahriar Behboudi, Munir Iqbal, Venugopal Nair, Clarice W Arns, Muhammad Munir
The intracellular actions of interferon (IFN)-regulated proteins, including IFN-induced proteins with tetratricopeptide repeats (IFITs), attribute a major component of the protective antiviral host defense. Here we applied genomics approaches to annotate the chicken IFIT locus and currently identified a single IFIT (chIFIT5) gene. The profound transcriptional level of this effector of innate immunity was mapped within its unique cis-acting elements. This highly virus- and IFN-responsive chIFIT5 protein interacted with negative sense viral RNA structures that carried a triphosphate group on its 5' terminus (ppp-RNA)...
May 1, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29672716/mir-122-does-not-impact-recognition-of-the-hcv-genome-by-innate-sensors-of-rna-but-rather-protects-the-5-end-from-the-cellular-pyrophosphatases-dom3z-and-dusp11
#2
Yalena Amador-Cañizares, Annie Bernier, Joyce A Wilson, Selena M Sagan
Hepatitis C virus (HCV) recruits two molecules of the liver-specific microRNA-122 (miR-122) to the 5' end of its genome. This interaction promotes viral RNA accumulation, but the precise mechanism(s) remain incompletely understood. Previous studies suggest that miR-122 is able to protect the HCV genome from 5' exonucleases (Xrn1/2), but this protection is not sufficient to account for the effect of miR-122 on HCV RNA accumulation. Thus, we investigated whether miR-122 was also able to protect the viral genome from innate sensors of RNA or cellular pyrophosphatases...
April 17, 2018: Nucleic Acids Research
https://www.readbyqxmd.com/read/29629559/ifit1-expression-patterns-induced-by-h9n2-virus-and-inactivated-viral-particle-in-human-umbilical-vein-endothelial-cells-and-bronchus-epithelial-cells
#3
Bo Feng, Qian Zhang, Jianfang Wang, Hong Dong, Xiang Mu, Ge Hu, Tao Zhang
IFIT1 (also known as ISG56) is a member of the interferoninducible protein with tetratricopeptide repeats (IFITs) family. IFITs are strongly induced by type I interferon (IFN), doublestranded RNA and virus infection. Here, we investigated IFIT1 expression in human umbilical vein endothelial cells (HUVECs) and in human bronchus epithelial cells (BEAS-2Bs) induced by the H9N2 virus and inactivated viral particle at different time points. We also investigated the effect of H9N2 virus and viral particle infection on IFN-α/β production, and assessed whether hemagglutinin or neuraminidase protein induced IFIT1 expression...
April 5, 2018: Molecules and Cells
https://www.readbyqxmd.com/read/29562196/a-talented-duo-ifit1-and-ifit3-patrol-viral-rna-caps
#4
Youn Jung Choi, James W Bowman, Jae U Jung
Hosts respond to viral infection by expressing interferon-stimulated genes, of which IFITs are potent inhibitors of viral RNA translation. Johnson et al. (2018) solved the structure of the IFIT1-IFIT3 complex bound cap 0 RNA and explored their concerted antiviral activity.
March 20, 2018: Immunity
https://www.readbyqxmd.com/read/29554348/ifit3-and-ifit2-3-promote-ifit1-mediated-translation-inhibition-by-enhancing-binding-to-non-self-rna
#5
Renata C Fleith, Harriet V Mears, Xin Yun Leong, Thomas J Sanford, Edward Emmott, Stephen C Graham, Daniel S Mansur, Trevor R Sweeney
Interferon-induced proteins with tetratricopeptide repeats (IFITs) are highly expressed during the cell-intrinsic immune response to viral infection. IFIT1 inhibits translation by binding directly to the 5' end of foreign RNAs, particularly those with non-self cap structures, precluding the recruitment of the cap-binding eukaryotic translation initiation factor 4F and ribosome recruitment. The presence of IFIT1 imposes a requirement on viruses that replicate in the cytoplasm to maintain mechanisms to avoid its restrictive effects...
March 15, 2018: Nucleic Acids Research
https://www.readbyqxmd.com/read/29525521/human-ifit3-modulates-ifit1-rna-binding-specificity-and-protein-stability
#6
Britney Johnson, Laura A VanBlargan, Wei Xu, James P White, Chao Shan, Pei-Yong Shi, Rong Zhang, Jagat Adhikari, Michael L Gross, Daisy W Leung, Michael S Diamond, Gaya K Amarasinghe
Although interferon-induced proteins with tetratricopeptide repeats (IFIT proteins) inhibit infection of many viruses by recognizing their RNA, the regulatory mechanisms involved remain unclear. Here we report a crystal structure of cap 0 (m7 GpppN) RNA bound to human IFIT1 in complex with the C-terminal domain of human IFIT3. Structural, biochemical, and genetic studies suggest that IFIT3 binding to IFIT1 has dual regulatory functions: (1) extending the half-life of IFIT1 and thereby increasing its steady-state amounts in cells; and (2) allosterically regulating the IFIT1 RNA-binding channel, thereby enhancing the specificity of recognition for cap 0 but not cap 1 (m7 GpppNm) or 5'-ppp RNA...
March 20, 2018: Immunity
https://www.readbyqxmd.com/read/29508616/proteomic-identification-of-interferon-induced-proteins-with-tetratricopeptide-repeats-as-markers-of-m1-macrophage-polarization
#7
Cheng Huang, Caitlin Lewis, Natalie A Borg, Meritxell Canals, Henry Diep, Grant R Drummond, Robert J Goode, Ralf B Schittenhelm, Antony Vinh, Mingyu Zhu, Barbara Kemp-Harper, Oded Kleifeld, Martin J Stone
Macrophages, which accumulate in tissues during inflammation, may be polarized toward pro-inflammatory (M1) or tissue reparative (M2) phenotypes. The balance between these phenotypes can have a substantial influence on the outcome of inflammatory diseases such as atherosclerosis. Improved biomarkers of M1 and M2 macrophages would be beneficial for research, diagnosis, and monitoring the effects of trial therapeutics in such diseases. To identify novel biomarkers, we have characterized the global proteomes of THP-1 macrophages polarized to M1 and M2 states in comparison with unpolarized (M0) macrophages...
April 6, 2018: Journal of Proteome Research
https://www.readbyqxmd.com/read/29434723/screening-for-key-genes-and-transcription-factors-in-ankylosing-spondylitis-by-rna-seq
#8
Zhongyang Xu, Xiuyu Wang, Yanping Zheng
Ankylosing spondylitis (AS) is a chronic inflammatory arthritis and autoimmune disease, the etiology and pathogenesis of which remain largely unknown. In the present study, blood samples were harvested from patients with AS and from healthy volunteers as a normal control (NC) for RNA-sequencing. Differentially expressed genes (DEGs) in the AS group compared with the NC group were identified, and gene ontology (GO) term and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses were subsequently performed...
February 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29428489/broad-spectrum-antiviral-functions-of-duck-interferon-induced-protein-with-tetratricopeptide-repeats-avifit
#9
Enguang Rong, Jiaxiang Hu, Chenghuai Yang, Hualan Chen, Zeng Wang, Xiaojuan Liu, Wenjie Liu, Chang Lu, Penghua He, Xiaoxue Wang, Xiaoyun Chen, Jinhua Liu, Ning Li, Yinhua Huang
Mammalian interferon-induced proteins with tetratricopeptide repeats (IFITs) play important roles in many cellular processes and host innate immune response to viruses. However, the functions of IFIT proteins in birds are largely unknown. Here, we first describe that the only one avian IFIT protein is orthologous to ancestor of mammalian IFITs. We find that the predicted structure of duck AvIFIT protein is similar to that of human IFIT5. We also find that duck AvIFIT protein shows antiviral activity to a broad range of specific RNA and DNA viruses like mammalian IFIT proteins...
July 2018: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/29322931/differential-responses-of-innate-immunity-triggered-by-different-subtypes-of-influenza-a-viruses-in-human-and-avian-hosts
#10
Yingying Cao, Yaowei Huang, Ke Xu, Yuanhua Liu, Xuan Li, Ye Xu, Wu Zhong, Pei Hao
BACKGROUND: Innate immunity provides first line of defense against viral infections. The interactions between hosts and influenza A virus and the response of host innate immunity to viral infection are critical determinants for the pathogenicity or virulence of influenza A viruses. This study was designed to investigate global changes of gene expression and detailed responses of innate immune systems in human and avian hosts during the course of infection with various subtypes of influenza A viruses, using collected and self-generated transcriptome sequencing data from human bronchial epithelial (HBE), human tracheobronchial epithelial (HTBE), and A549 cells infected with influenza A virus subtypes, namely H1N1, H3N2, H5N1 HALo mutant, and H7N9, and from ileum and lung of chicken and quail infected with H5N1, or H5N2...
December 21, 2017: BMC Medical Genomics
https://www.readbyqxmd.com/read/29273069/single-walled-carbon-nanotubes-modulate-pulmonary-immune-responses-and-increase-pandemic-influenza-a-virus-titers-in-mice
#11
Hao Chen, Xiao Zheng, Justine Nicholas, Sara T Humes, Julia C Loeb, Sarah E Robinson, Joseph H Bisesi, Dipesh Das, Navid B Saleh, William L Castleman, John A Lednicky, Tara Sabo-Attwood
BACKGROUND: Numerous toxicological studies have focused on injury caused by exposure to single types of nanoparticles, but few have investigated how such exposures impact a host's immune response to pathogen challenge. Few studies have shown that nanoparticles can alter a host's response to pathogens (chiefly bacteria) but there is even less knowledge of the impact of such particles on viral infections. In this study, we performed experiments to investigate if exposure of mice to single-walled carbon nanotubes (SWCNT) alters immune mechanisms and viral titers following subsequent influenza A virus (IAV) infection...
December 22, 2017: Virology Journal
https://www.readbyqxmd.com/read/29152578/middle-east-respiratory-syndrome-coronavirus-nonstructural-protein-16-is-necessary-for-interferon-resistance-and-viral-pathogenesis
#12
Vineet D Menachery, Lisa E Gralinski, Hugh D Mitchell, Kenneth H Dinnon, Sarah R Leist, Boyd L Yount, Rachel L Graham, Eileen T McAnarney, Kelly G Stratton, Adam S Cockrell, Kari Debbink, Amy C Sims, Katrina M Waters, Ralph S Baric
Coronaviruses (CoVs) encode a mixture of highly conserved and novel genes, as well as genetic elements necessary for infection and pathogenesis, raising the possibility of common targets for attenuation and therapeutic design. In this study, we focused on highly conserved nonstructural protein 16 (NSP16), a viral 2' O -methyltransferase (2' O -MTase) that encodes critical functions in immune modulation and infection. Using reverse genetics, we disrupted a key motif in the conserved KDKE motif of Middle East respiratory syndrome CoV (MERS-CoV) NSP16 (D130A) and evaluated the effect on viral infection and pathogenesis...
November 2017: MSphere
https://www.readbyqxmd.com/read/29064427/the-mek-inhibitors-trametinib-and-cobimetinib-induce-a-type-i-interferon-response-in-human-keratinocytes
#13
Daniela Lulli, Maria Luigia Carbone, Saveria Pastore
Mitogen-activated protein kinase kinases (MEK) 1 and 2 have crucial roles in tumorigenesis, cell proliferation, and protection from apoptosis, and their inhibition is therefore an attractive therapeutic strategy in cancer. Orally available and highly selective MEK inhibitors have been developed and assessed in numerous clinical trials, either alone or in combination with cytotoxic chemotherapy and/or other targeted agents. Of note, a complex picture of class-specific adverse effects associates with these drugs, frequently including inflammatory skin rash...
October 24, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29059831/real-time-gait-analysis-with-accelerometer-based-smart-shoes
#14
R Delgado-Gonzalo, J Hubbard, Ph Renevey, A Lemkaddem, Q Vellinga, D Ashby, J Willardson, M Bertschi
In this paper, we present the evaluation of a new smart shoe capable of performing gait analysis in real time. The system is exclusively based on accelerometers which minimizes the power consumption. The estimated parameters are activity class (rest/walk/run), step cadence, ground contact time, foot impact (zone, strength, and balance), forward distance, and speed. The different parameters have been validated with a customized database of 26 subjects on a treadmill and video data labeled manually. Key measures for running analysis such as the cadence is retrieved with a maximum error of 2%, and the ground contact time with an average error of 3...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29023988/molecular-dynamics-simulation-binding-free-energy-calculation-and-unbinding-pathway-analysis-on-selectivity-difference-between-fkbp51-and-fkbp52-insight-into-the-molecular-mechanism-of-isoform-selectivity
#15
Danfeng Shi, Qifeng Bai, Shuangyan Zhou, Xuewei Liu, Huanxiang Liu, Xiaojun Yao
As co-chaperones of the 90-kDa heat shock protein(HSP90), FK506 binding protein 51 (FKBP51) and FK506 binding protein 52 (FKBP52) modulate the maturation of steroid hormone receptor through their specific FK1 domains (FKBP12-like domain 1). The inhibitors targeting FK1 domains are potential therapies for endocrine-related physiological disorders. However, the structural conservation of the FK1 domains between FKBP51 and FKBP52 make it difficult to obtain satisfactory selectivity in FK506-based drug design. Fortunately, a series of iFit ligands synthesized by Hausch et al exhibited excellent selectivity for FKBP51, providing new opportunity for design selective inhibitors...
October 12, 2017: Proteins
https://www.readbyqxmd.com/read/28806906/age-associated-mrna-expression-changes-in-bovine-endometrial-cells-in-vitro
#16
Nao Tanikawa, Ayaka Ohtsu, Ryouka Kawahara-Miki, Koji Kimura, Shuichi Matsuyama, Hisataka Iwata, Takehito Kuwayama, Koumei Shirasuna
BACKGROUND: Endometrial cells secrete various cytokines and the dysfunction of endometrial cells may directly lead to infertility. Interferon tau (IFNT) secreted by trophoblast cells, a well-known pregnancy recognition signal in ruminants, acts on the uterus to prepare for pregnancy. Aging causes cellular and organ dysfunction, and advanced maternal age is associated with reduced fertility. However, few studies have investigated age-dependent changes in the uterus. METHODS: Using next generation sequencing and real-time PCR, we examined mRNA expression in bovine endometrial cells in vitro obtained from young (mean 45...
August 14, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/28768867/mechanism-of-interferon-stimulated-gene-induction-in-hiv-1-infected-macrophages
#17
Najla Nasr, Abdullateef A Alshehri, Thomas K Wright, Maryam Shahid, Bonnie M Heiner, Andrew N Harman, Rachel A Botting, Karla J Helbig, Michael R Beard, Kazuo Suzuki, Anthony D Kelleher, Paul Hertzog, Anthony L Cunningham
Viruses manipulate the complex interferon and interferon-stimulated gene (ISG) system in different ways. We have previously shown that HIV inhibits type I and III interferons in its key target cells but directly stimulates a subset of >20 ISGs in macrophages and dendritic cells, many of which are antiviral. Here, we examine the mechanism of induction of ISGs and show this occurs in two phases. The first phase was transient (0 to 24 h postinfection [hpi]), induced mainly by extracellular vesicles and one of its component proteins, HSP90α, contained within the HIV inoculum...
October 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28487939/identification-of-novel-genes-associated-with-fracture-healing-in-osteoporosis-induced-by-krm2-overexpression-or-lrp5-deficiency
#18
Feng Gao, Feng Xu, Dankai Wu, Jieping Cheng, Peng Xia
The aim of the present study was to screen potential key genes associated with osteoporotic fracture healing. The microarray data from the Gene Expression Omnibus database accession number GSE51686, were downloaded and used to identify differentially expressed genes (DEGs) in fracture callus tissue samples obtained from the femora of type I collagen (Col1a1)‑kringle containing transmembrane protein 2 (Krm2) mice and low density lipoprotein receptor‑related protein 5‑/‑ (Lrp5‑/‑) transgenic mice of osteoporosis compared with those in wild‑type (WT) mice...
June 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28373872/type-i-interferon-gene-response-is-increased-in-early-and-established-rheumatoid-arthritis-and-correlates-with-autoantibody-production
#19
Julio E Castañeda-Delgado, Yadira Bastián-Hernandez, Noe Macias-Segura, David Santiago-Algarra, Jose D Castillo-Ortiz, Ana L Alemán-Navarro, Pedro Martínez-Tejada, Leonor Enciso-Moreno, Yolanda Garcia-De Lira, Diana Olguín-Calderón, Leendert A Trouw, Cesar Ramos-Remus, Jose A Enciso-Moreno
BACKGROUND: Rheumatoid arthritis (RA) is an inflammatory debilitating disease that affects the joints in the early and productive phases of an individual's life. Several cytokines have been linked to the disease pathogenesis and are known to contribute to the inflammatory state characteristic of RA. The participation of type I interferon (IFN) in the pathogenesis of the disease has been already described as well as the identity of the genes that are regulated by this molecule, which are collectively known as the type I IFN signature...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28325014/real-time-monitoring-of-swimming-performance
#20
R Delgado-Gonzalo, A Lemkaddem, Ph Renevey, E Muntane Calvo, M Lemay, K Cox, D Ashby, J Willardson, M Bertschi
This article presents the performance results of a novel algorithm for swimming analysis in real-time within a low-power wrist-worn device. The estimated parameters are: lap count, stroke count, time in lap, total swimming time, pace/speed per lap, total swam distance, and swimming efficiency (SWOLF). In addition, several swimming styles are automatically detected. Results were obtained using a database composed of 13 different swimmers spanning 646 laps and 858.78 min of total swam time. The final precision achieved in lap detection ranges between 99...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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