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Premature stop codons in the hepatitis B virus (HBV) surface protein can be associated with nucleos(t)ide analogue resistance due to overlap of the HBV surface and polymerase genes. The aim of this study was to determine the effect of the replication of three common surface stop codon variants on the hepatocyte. Cell lines were transfected with infectious HBV clones encoding surface stop codons rtM204I/sW196*,...
Apoptosis is a powerful host cell defense to prevent viruses from completing replication. Poxviruses have evolved complex means to dampen cellular apoptotic responses. The poxvirus, Molluscum Contagiosum Virus (MCV), encodes numerous host interacting molecules predicted to antagonize immune responses. However, the function of the majority of these MCV products has not been characterized. Here, we...
Acquired Immune Deficiency Syndrome is characterized by a decline in CD4+ T cells. Here, we elucidated the mechanism underlying apoptosis in Human Immunodeficiency Virus-1 (HIV-1) infection by examining host apoptotic pathways hijacked by the HIV-1 Nef protein in the CD4+ T-cell line Sup-T1. Using a panel of Nef mutants unable to bind specific host proteins we uncovered that Nef generates pro- and...
Virus encoded tumor necrosis factor receptor (TNFR) homologues are usually involved in immune evasion by regulating host immune response or cell death. Singapore grouper iridovirus (SGIV) is a novel ranavirus which causes great economic losses in aquaculture industry. Previous studies demonstrated that SGIV VP51, a TNFR-like protein regulated apoptotic process in VP51 overexpression cells. Here, we...
The Rabies lyssavirus glycoprotein (RABV-G) is largely responsible for the neuroinvasiveness of the virus and the induction of antiviral immune responses.To study the effects of RABV-G we compared the G of the attenuated RABV variant SPBN with that of the pathogenic DOG4 strain. Infection via the olfactory route caused 100% mortality in mice with both virus variants. Of note, with the attenuated SPBN,...
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