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Infectious Disease: Dengue Fever

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Total 65 results found since Jan 2013.

GSE65070 The hub protein Loqs connects the miRNA and endo-siRNA pathways in mosquitos
Contributors : Mary E Haac ; Michelle A Anderson ; Heaher L Eggleston ; Kevin M Myles ; Zach N AdelmanSeries Type : Non-coding RNA profiling by high throughput sequencingOrganism : Aedes aegyptiAedes aegypti mosquitoes vector several arboviruses of global health significance, including dengue viruses and chikungunya virus. RNA interference (RNAi) plays an important role in antiviral immunity, gene regulation and protection from transposable elements. Double-stranded RNA binding proteins (dsRBPs) are important for efficient RNAi; in Drosophila functional specialization of the miRNA, endo-siRNA and exo-siRNA pathway is aided...
Source: GEO: Gene Expression Omnibus - April 8, 2015 Category: Genetics & Stem Cells Tags: Non-coding RNA profiling by high throughput sequencing Aedes aegypti Source Type: research

Kinome siRNA screen identifies novel cell-type specific dengue host target genes.
Abstract Dengue is a global emerging infectious disease, with no specific treatment available. To identify novel human host cell targets important for dengue virus infection and replication, an image-based high-throughput siRNA assay screening of a human kinome siRNA library was conducted using human hepatocyte cell line Huh7 infected with a recent dengue serotype 2 virus isolate BR DEN2 01-01. In the primary siRNA screening of 779 kinase-related genes, knockdown of 22 genes showed a reduction in DENV-2 infection. Conversely, knockdown of 8 genes enhanced viral infection. To assess host cell specificity, the confi...
Source: Antiviral Research - July 18, 2014 Category: Virology Authors: Kwon YJ, Heo J, Wong HE, Cruz DJ, Velumani S, da Silva CT, Mosimann AL, Duarte Dos Santos CN, Freitas-Junior LH, Fink K Tags: Antiviral Res Source Type: research

Kinome siRNA screen identifies novel cell-type specific dengue host target genes
Publication date: October 2014 Source:Antiviral Research, Volume 110 Author(s): Yong-Jun Kwon , Jinyeong Heo , Hazel E.E. Wong , Deu John M. Cruz , Sumathy Velumani , Camila T. da Silva , Ana Luiza P. Mosimann , Claudia N. Duarte dos Santos , Lucio H. Freitas-Junior , Katja Fink Dengue is a global emerging infectious disease, with no specific treatment available. To identify novel human host cell targets important for dengue virus infection and replication, an image-based high-throughput siRNA assay screening of a human kinome siRNA library was conducted using human hepatocyte cell line Huh7 infected with a recent dengue...
Source: Antiviral Therapy - November 13, 2014 Category: Infectious Diseases Source Type: research

The < i > Aedes aegypti < /i > siRNA pathway mediates broad-spectrum defense against human pathogenic viruses and modulates antibacterial and antifungal defenses
by Yuemei Dong, Shengzhang Dong, Nahid Borhani Dizaji, Natalie Rutkowski, Tyler Pohlenz, Kevin Myles, George Dimopoulos The mosquito’s innate immune system defends against a variety of pathogens, and the conserved siRNA pathway plays a central role in the control of viral infections. Here, we show that transgenic overexpression of Dicer2 (Dcr2) orR2d2 resulted in an accumulation of 21-nucleotide viral sequences that was accompanied by a significant suppression of dengue virus (DENV), Zika virus (ZIKV), and chikungunya virus (CHIKV) replication, thus indicating the broad-spectrum antiviral response mediated by the siRNA ...
Source: PLoS Biology: Archived Table of Contents - June 9, 2022 Category: Biology Authors: Yuemei Dong Source Type: research

siRNA-Mediated Silencing of doublesex during Female Development of the Dengue Vector Mosquito Aedes aegypti
by Keshava Mysore, Longhua Sun, Michael Tomchaney, Gwyneth Sullivan, Haley Adams, Andres S. Piscoya, David W. Severson, Zainulabeuddin Syed, Molly Duman-Scheel The development of sex-specific traits, including the female-specific ability to bite humans and vector disease, is critical for vector mosquito reproduction and pathogen transmission. Doublesex (Dsx), a terminal transcription factor in the sex determination pathway, is known to regulate sex-specific gene expression during development of the dengue fever vector mosquito Aedes aegypti. Here, the effects of developmental siRNA-mediated dsx silencing were assessed in ...
Source: PLoS Neglected Tropical Diseases - November 6, 2015 Category: Tropical Medicine Authors: Keshava Mysore et al. Source Type: research

Chitosan/siRNA nanoparticle targeting demonstrates a requirement for single-minded during larval and pupal olfactory system development of the vector mosquito Aedes aegypti
Conclusions: The results of this investigation indicate that Sim has multiple functions during larval and pupal olfactory system development in A. aegypti.
Source: BMC Developmental Biology - Latest articles - February 19, 2014 Category: Zoology Authors: Keshava MysoreEmily AndrewsPing LiMolly Duman-Scheel Source Type: research

High-Throughput Characterization of Viral and Cellular Protein Expression Patterns During JC Polyomavirus Infection
Discussion The study of viral infections in vitro has provided innumerable advances to the field of virology. However, the lack of rapid and efficient screening tools has hindered research progress for some viruses, like JCPyV (Houff et al., 1983; Zu Rhein, 1983; Assetta and Atwood, 2017). To overcome this challenge, the development of high-throughput analyses is needed to help aid in the production of large data sets and generation of multiple lines of inquiry. Current methodologies for analyzing JCPyV infectivity predominantly rely on manual quantitation of infection by indirect immunodetection of viral proteins by epif...
Source: Frontiers in Microbiology - April 16, 2019 Category: Microbiology Source Type: research

IFIT5 Participates in the Antiviral Mechanisms of Rainbow Trout Red Blood Cells
We described a new defense mechanism based on IFIT5 antiviral activity in nucleated RBCs that appeared to contribute to halting the VHSV infection. This finding sheds light into novel antiviral therapeutics to mitigate the economic losses and social impact caused by viral infections in the aquaculture industry. This work broadens the knowledge of fish nucleated RBCs functions and their role in the immune response to viral infections. Ethics Statement Experimental protocols and methods relating to experimental animals were reviewed and approved by the Animal Welfare Body and the Research Ethics Committee at the University...
Source: Frontiers in Immunology - April 15, 2019 Category: Allergy & Immunology Source Type: research

Viruses, Vol. 13, Pages 1066: An Aedes Aegypti-Derived Ago2 Knockout Cell Line to Investigate Arbovirus Infections
l Esther Schnettler Mosquitoes are known as important vectors of many arthropod-borne (arbo)viruses causing disease in humans. These include dengue (DENV) and Zika (ZIKV) viruses. The exogenous small interfering (si)RNA (exo-siRNA) pathway is believed to be the main antiviral defense in arthropods, including mosquitoes. During infection, double-stranded RNAs that form during viral replication and infection are cleaved by the enzyme Dicer 2 (Dcr2) into virus-specific 21 nt vsiRNAs, which are subsequently loaded into Argonaute 2 (Ago2). Ago2 then targets and subsequently cleaves complementary RNA sequences, resulting i...
Source: Viruses - June 3, 2021 Category: Virology Authors: Christina Scherer Jack Knowles Vattipally B. Sreenu Anthony C. Fredericks Janina Fuss Kevin Maringer Ana Fernandez-Sesma Andres Merits Margus Varjak Alain Kohl Esther Schnettler Tags: Article Source Type: research

Viruses, Vol. 14, Pages 339: In Vitro Inhibition of Replication of Dengue Virus Serotypes 1 & ndash;4 by siRNAs Bound to Non-Toxic Liposomes
The objective herein was to design and evaluate in vitro siRNAs bound to liposomes that inhibit DENV replication. siRNAs were designed against DENV1&amp;ndash;4 from conserved regions using siDirect2.0 and Web-BLOCK-iT&amp;trade; RNAiDesigner; the initial in vitro evaluation was carried out through transfection into HepG2 cells. siRNA with silencing capacity was encapsulated in liposomes composed of D-Lin-MC3-DMA, DSPC, Chol. Cytotoxicity, hemolysis, pro-inflammatory cytokine release and antiviral activity were evaluated using plaque assay and RT-qPCR. A working concentration of siRNA was established at 40 nM. siRN...
Source: Viruses - February 7, 2022 Category: Virology Authors: Rodriguez-Salazar Recalde-Reyes Bedoya Padilla-Sanabria Casta ño-Osorio Giraldo Tags: Article Source Type: research

The hub protein loquacious connects the microRNA and short interfering RNA pathways in mosquitoes
Aedes aegypti mosquitoes vector several arboviruses of global health significance, including dengue viruses and chikungunya virus. RNA interference (RNAi) plays an important role in antiviral immunity, gene regulation and protection from transposable elements. Double-stranded RNA binding proteins (dsRBPs) are important for efficient RNAi; in Drosophila functional specialization of the miRNA, endo-siRNA and exo-siRNA pathway is aided by the dsRBPs Loquacious (Loqs-PB, Loqs-PD) and R2D2, respectively. However, this functional specialization has not been investigated in other dipterans. We were unable to detect Loqs-PD in Ae....
Source: Nucleic Acids Research - April 19, 2015 Category: Research Authors: Haac, M. E., Anderson, M. A. E., Eggleston, H., Myles, K. M., Adelman, Z. N. Tags: Molecular Biology Source Type: research

Induction of RNA interference to block Zika virus replication and transmission in the mosquito Aedes aegypti.
This study lays critical groundwork for pursuing ZIKV transmission-blocking strategies that exploit the Ae. aegypti exo-siRNA response for arbovirus suppression in natural populations. PMID: 31103782 [PubMed - as supplied by publisher]
Source: Insect Biochemistry and Molecular Biology - May 15, 2019 Category: Biochemistry Authors: Magalhaes T, Bergren NA, Bennett SL, Borland EM, Hartman DA, Lymperopoulos K, Sayre R, Borlee BR, Campbell CL, Foy BD, Olson KE, Blair CD, Black W, Kading RC Tags: Insect Biochem Mol Biol Source Type: research

Examination of the genetic basis for sexual dimorphism in the Aedes aegypti (dengue vector mosquito) pupal brain
Conclusions These studies revealed sex-specific gene expression profiles in the developing A. aegypti pupal head and identified Doublesex as a key regulator of sexually dimorphic gene expression during mosquito neural development.
Source: Biology of Sex Differences - October 21, 2014 Category: Biology Source Type: research

siRNAs encapsulated in Recombinant Capsid protein derived from Dengue serotype 2 virus inhibits the four serotypes of the virus and proliferation of cancer cells
In this study we have evaluated the utility of the protein as an siRNA carrier for anti Dengue viral and anti cancer applications using cell culture systems. We show that target specific siRNAs delivered using the capsid protein inhibit infection by the four serotypes of Dengue virus and proliferation of two cancer cell lines. Our data confirm the potential of the capsid for anti Dengue viral and anti cancer RNAi applications. In addition, we have optimized a fermentation strategy to improve the yield of E. coli expressed D2C protein since the reported yield of E.coli expressed flaviviral capsid proteins are low.
Source: Journal of Biotechnology - November 13, 2014 Category: Biotechnology Source Type: research

KDEL Receptors Assist Dengue Virus Exit from the Endoplasmic Reticulum
In this study, we demonstrate that dengue virus (DENV) interacts with KDEL receptors (KDELR), which cycle between the ER and Golgi apparatus, for vesicular transport from ER to Golgi. Depletion of KDELR by siRNA reduced egress of both DENV progeny and recombinant subviral particles (RSPs). Coimmunoprecipitation of KDELR with dengue structural protein prM required three positively charged residues at the N terminus, whose mutation disrupted protein interaction and inhibited RSP transport from the ER to the Golgi. Finally, siRNA depletion of class II Arfs, which results in KDELR accumulation in the Golgi, phenocopied result...
Source: Cell Reports - March 6, 2015 Category: Cytology Source Type: research