Project description:Virus infections induce cellular gene up and down regulation, and these changes often provide clues to cellular pathways utilized by viruses. We used microarrays to examine the transcriptional responses of cultured Drosophila S2 cells to Flock House virus (FHV) replicon induction.
Project description:Virus infections induce cellular gene up and down regulation, and these changes often provide clues to cellular pathways utilized by viruses. We used microarrays to examine the transcriptional responses of cultured Drosophila S2 cells to infection with Flock House virus (FHV).
2009-04-01 | GSE15466 | GEO
Project description:Flock House virus puff particle
Project description:Virus infections induce cellular gene up and down regulation, and these changes often provide clues to cellular pathways utilized by viruses. We used microarrays to examine the transcriptional responses of cultured Drosophila S2 cells to infection with Flock House virus (FHV). Experiment Overall Design: Cultured S2 cells were infected with FHV at an MOI of 10 and we measured global transcript levels at 12 h after infection compared to control mock infected cells using Affymetrix Drosophila Genome 1.0 microarray chips.
Project description:Virus infections induce cellular gene up and down regulation, and these changes often provide clues to cellular pathways utilized by viruses. We used microarrays to examine the transcriptional responses of cultured Drosophila S2 cells to Flock House virus (FHV) replicon induction. Experiment Overall Design: Cultured S2 cells stably transfected with either a control replicon (pS2F1fs) or an FHV RNA1 replicon (pS2F1) were induced with 1 mM copper and we measured global transcript levels at 18 h after induction using Affymetrix Drosophila Genome 2.0 microarray chips.
Project description:Little is known about the molecular determinants causing and sustaining viral persistent infections at the cellular level. We found that Drosophila cells persistently infected (PI) with Flock House virus (FHV) invariably harbor defective viral RNAs, which are replicated by the FHV RNA-dependent RNA polymerase. Some defective RNAs encoded a functional B2 protein, the FHV suppressor of RNA interference, which might contribute to maintenance of virus persistence. Viral small interfering RNAs (vsiRNAs) of both polarities were detected in PI cells and primarily mapped to regions of the viral genome that were preserved in the isolated defective RNAs. This indicated that defective RNAs could represent major sources of vsiRNAs. Immunofluorescence analysis revealed that mitochondria and viral proteins are differentially distributed in PI cells and lytically infected cells, which may partly explain the reduction in infectious viral progeny. Our results provide a basis for further investigations of the molecular mechanisms underlying persistent infections.
