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Most poxviruses encode a homolog of a ~200,000-kDa membrane protein originally identified in variola virus. We investigated the importance of the ectromelia virus (ECTV) homolog C15 in a natural infection model. In cultured mouse cells, the replication of a mutant virus with stop codons near the N-terminus (ECTV-C15Stop) was indistinguishable from a control virus (ECTV-C15Rev). However, for a range...
Guinea pig cytomegalovirus (GPCMV) immediate early proteins, IE1 and IE2, demonstrated structural and functional homologies with human cytomegalovirus (HCMV). GPCMV IE1 and IE2 co-localized in the nucleus with each other, the viral polymerase and guinea pig ND10 components (gpPML, gpDaxx, gpSp100, gpATRX). IE1 showed direct interaction with ND10 components by immunoprecipitation unlike IE2. Additionally,...
Whether respiratory syncytial virus (RSV) induces severe infantile pulmonary disease may depend on viral strain and expression of types I and III interferons (IFNs). These IFNs impact disease severity by inducing expression of many anti-viral IFN-stimulated genes (ISGs). To investigate the impact of RSV strain on IFN and ISG expression, we stimulated human monocyte-derived DCs (MDDCs) with either...
The foot-and-mouth disease virus (FMDV) leader protease (Lpro) inhibits host translation and transcription affecting the expression of several factors involved in innate immunity. In this study, we have identified the host transcription factor ADNP (activity dependent neuroprotective protein) as an Lpro interacting protein by mass spectrometry. We show that Lpro can bind to ADNP in vitro and in cell...
Mannose binding lectin (MBL) is a collagenous C-type lectin, which plays an important role in innate immunity. It can bind to carbohydrates on the surface of a wide range of pathogens, including viruses. Here we studied the antiviral effect of recombinant chicken (rc)MBL against Infectious Bronchitis Virus (IBV), a highly contagious coronavirus of chicken. rcMBL inhibited in a dose-dependent manner...
Ebolaviruses (EBOV) cause severe disease with a recent outbreak in West Africa in 2014–2015 leading to more than 28 000 cases and 11 300 fatalities. This emphasizes the urgent need for better knowledge on these highly pathogenic RNA viruses. Host innate immune responses play a key role in restricting the spread of a viral disease. In this study we systematically analyzed the effects of cloned EBOV...
The iridovirus RNase III gene is one of 26 conserved core genes among the family Iridoviridae. Initial studies suggest this viral protein functions to suppress RNA interference pathways that may attack viral RNA during infection. Therefore, to determine if the Ambystoma tigrinum virus (ATV) RNase III-like gene (ORF 25R) can modulate the host innate immune response fish and human cells ectopically...
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