Defective interfering (DI) RNAs have been isolated from a broad spectrum of animal viruses and have recently been identified in plant virus infections. Because of their ubiquitous nature, DIs are thought to play an important role in virus replication and yields. DI RNAs have now been found in association with a natural isolate of turnip crinkle virus (TCV-B) and are generated de novo after inoc...

Mouse cells contain the genetic information for multiple endogenous type-C RNA viruses. The mechanisms by which the cell controls expression of these naturally integrated viruses are not yet known. Recently, chemicals that inhibit protein synthesis have been shown to induce a specific type-C virus at high frequency from BALB/c mouse embryo cells. In the present studies, virus activation in resp...

RNA viruses evolve rapidly. One source of this ability to rapidly change is the apparently high mutation frequency in RNA virus populations. A high mutation frequency is a central tenet of the quasispecies theory. A corollary of the quasispecies theory postulates that, given their high mutation frequency, animal RNA viruses may be susceptible to error catastrophe, where they undergo a sharp dro...

Synthesis of vesicular stomatitis virus RNA and protein is almost completely inhibited in HeLa cells treated with relatively high doses of human fibroblast interferon. With lower concentrations of interferon virus replication is inhibited, but near normal amounts of virus RNA are found in cells infected at a m.o.i. of 10. All the virus RNA species are found in these cells with the exception of ...

background: hepatitis c virus (hcv) infection is the most common transfusion transmitted disease in poly-transfused patients worldwide. in this study we aimed to evaluate the effects of pegylated interferon alfa-2a (peg-ifn a-2a) in reducing serum alt and eradicating serum hepatitis c virus (hcv) rna in hcv infected polytransfused thalassemic patients. materials and methods: a cohort of 51 hcv-...

We measured the accumulation of virus-specific early RNA in BALB/3T3 cells infected by the ts3 mutant of polyoma virus by annealing cytoplasmic RNA from infected cells to purified, radiolabeled, "early" strand of polyoma DNA. Cells infected by the ts3 mutant fail to accumulate virus-specific early RNA at the nonpermissive temperature.

The hop latent virus is a single-stranded RNA virus that mainly infects hop plants. Here, we report the complete genome sequence of a hop latent virus, which was de novo assembled by RNA sequencing (RNA-seq). Our study indicates that transcriptome data are useful for identifying a complete viral genome.

Rabies, a negative strand RNA virus belonging to the genus Lyssavirus has existed since hundreds of years. Available historical texts called it 'an ancient curse'. From Aristotle in fourth century BC present day, rabies various species animals. Modern day molecular epidemiology proven evolving nature virus. The showcases considerable genetic plasticity and hence still exists as tangible threat ...

We have studied the nucleic acid sequences in nonproducer cells transformed by Moloney sarcoma virus or Abelson leukemia virus (two types of replication-defective, RNA-containing, viruses isolated by passage of Moloney leukemia virus in BALB/c mice). DNA probes from the Moloney leukemia in virus detect RNA in both Abelson virus-transformed nonproducer cells and Moloney sarcoma virus-transformed...

BACKGROUND Arctium species (Asteraceae) are distributed worldwide and are used as food and rich sources of secondary metabolites for the pharmaceutical industry, e.g., against avian influenza virus. RNA silencing is an antiviral defense mechanism that detects and destroys virus-derived double-stranded RNA, resulting in accumulation of virus-derived small RNAs (21-24 nucleotides) that can be use...