N-Tera2 differentiated human neuronal model: Mock infected vs HCoV-OC43 infected
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ABSTRACT: Transcriptional profiling of N-Tera2 differentiated human neuronal cells, comparing control uninfected cells to HCoV-OC43 infected cells at 24, 48 and 72 hour post-infection Keywords: Cell response to viral infection Two-condition experiment, N-Tera2 differentiated human neuronal cell mock infected vs. N-Tera2 differentiated human neuronal cell HCoV-OC43 infected at 24, 48 and 72 hours. Biological replicates: 2 at each time-course point. Technical replicate: 2 dye-swap at each time-point. 2 arrays hybridized with mock(cy3) vs infected(cy5) and 2 array with infected(cy3) vs mock(cy5).
Project description:Differential expression was determined in Calu-3 cells between mock infected and infection with either Human coronavirus EMC and SARS coronavirus at different times post infection. Calu-3 2B4 cells were infected with Human Coronavirus EMC 2012 (HCoV-EMC) or mock infected. Samples were collected 0, 3, 7, 12, 18 and 24 hpi. There are 3 mock and 3 infected replicates for each time point, except for 12 hpi for which there are only 2 infected replicates (one replicate did not pass RNA quality check). There were no mock sampes at 18 hpi, and therefore infected samples at 18 hpi were compared with mocks at 24 hpi. For direct comparison with SARS-CoV infected cells, raw data from HCoV-EMC experiments were quantile normalized together with the SARS-CoV dataset (GEO Series accession number GSE33267).
Project description:We used microarrays to detail the global programme of gene expression in response to Influenza A (PR8) infection Fully differentiated MTEC cells were infected with PR8 (moi: 0.3) or mock infected and RNA was collected at 24 hours post infection
Project description:We used microarrays to detail the global programme of gene expression in response to Influenza A (PR8) infection Fully differentiated MTEC cells were infected with PR8 (moi: 0.3) or mock infected and RNA was collected at 24 hours post infection
Project description:We used microarrays to detail the global programme of gene expression in response to Influenza A (PR8) infection Fully differentiated MTEC cells were infected with PR8 (moi: 0.3) or mock infected and RNA was collected at 24 hours post infection
Project description:human bronchial smooth muscle cells were either infected with empty adenoviral type 5 vector at 40 MOI for 4 days, or Mock infected. Each sample set was then stimulated with a mixture of 10ng/mL IL-1beta, TNF-alfa, and gamma-IFN for 20 hours prior to RNA harvest. RNA samples were split, and the series consists of 3 slides, 2 of which are dye flipped.
Project description:Periodic outbreaks of highly pathogenic avian H5N1 influenza viruses and the current H1N1 pandemic highlight the need for a more detailed understanding of influenza virus pathogenesis. To investigate the host transcriptional response induced by pathogenic influenza viruses, we used a functional-genomics approach to compare gene expression profiles in lungs from wild-type 129S6/SvEv and interferon receptor (IFNR) knockout mice infected with either the fully reconstructed H1N1 1918 pandemic virus (1918) or the highly pathogenic avian H5N1 virus Vietnam/1203/04 (VN/1203). Eight- to 10-week-old female wild-type and IFNR1-/- mice (on a 129S6/SvEv background) were anesthetized by intraperitoneal injection of 0.2 ml of 2,2,2-tribromoethanol in tert-amylalcohol (Avertin; Sigma-Aldrich, Milwaukee, WI). Ten times the 50% lethal dose (LD50), 3.2 × 10^4 PFU (1918) or 7 × 10^3 PFU (VN/1203), in 50 μl of infectious virus diluted in phosphate-buffered saline (PBS) was inoculated intranasally (i.n.). Lung tissue was harvested for microarray analysis from infected animals at 1, 3, and 4 days post-innoculation. For RNA isolation, lungs were frozen in individual tubes and stored in solution D (4 M guanidinium thiocyanate, 25 mM sodium citrate, 0.5% sarcosyl, 0.1 M β-mercaptoethanol). Separate microarrays were run for each infected mouse. This included 2 animals/time point for 1918 virus-infected mice (24 animals total) or 3 animals/time point for VN/1203-infected mice (36 animals total). Lung tissue from three uninfected wild type 129S6/SvEv mice was collected as a mock control. Equal masses of total RNA from the lung tissue of the three mice were pooled prior to being run on microarray. Two-channel microarrays were used to determine gene expression in the lungs. For each individual infected lung, gene expression from an infected lung was compared to gene expression from the pooled RNA from the mock control.
Project description:We characterized the role of the conserved murine cytomegalovirus (MCMV) gene M79. Using a recombinant MCMV virus carrying a tagged M79 coding sequence, we showed that M79 encoded a protein (pM79) which was expressed at late times of infection and localized to nuclear viral replication compartments. M79 transcription was largely dependent on viral DNA synthesis but was markedly stimulated by pM79, suggesting a positive feedback loop. To investigate its role, we created the recombinant virus SMin79, in which the M79 coding sequence was disrupted by an 88-nt insertion. We subsequently repaired the mutation to generate marker-rescued virus SMrev79. While SMrev79 grew efficiently in fibroblasts, SMin79 failed to produce infectious progeny but was rescued by pM79 expression in trans. During SMin79 infection, representative viral immediate early and early gene products, as well as viral DNA, accumulated efficiently. Formation of viral replication compartments also appeared normal. Pulsed field gel electrophoresis analysis indicated that the overall structure of replicating viral DNA was indistinguishable in cells infected with SMin79 compared to that with wild type virus. However, the accumulation of viral products for late gene M55 was severely compromised. Viral oligonucleotide tiled array analysis revealed that the accumulation of many late transcripts, defined by their sensitivity to viral DNA synthesis inhibitor phosphonoacetic acid, was markedly reduced by pM79 mutation. This study extends our previous work to suggest that cytomegaloviruses use a conserved mechanism to promote transcription at late stages of infection, and that pM79 regulates expression of a subset of viral DNA synthesis-dependent transcripts. This study consists of 4 unreplicated samples. RNA from Mock-infected, WT infected, WT infected in the presence of PAA, and a mutant M79 version of MCMV.
Project description:Singapore grouper iridovirus (SGIV) is the major agent that causes severe iridovirus diseases in grouper maricluture. Based on the genomic information, a DNA microarray, containing probes corresponding to 162 putative SGIV open reading frames (ORFs), was constructed to map the viral gene transcriptional profiles over the time course by establishing the models of SGIV-infected GS cells and SGIV-infected grouper. All the data from real-time RT-PCR, RT-PCR and dilution RT-PCR assays were confirmed with the findings of microarrays, which were clustered into groups with the similarity expression profiles by the Self-Organizing Maps (SOMs) approach. The microarray analysis showed that SGIV had big differential expression profiles in the special infected cells and organ and the viral DNA replication mechanisms were firstly prevented as an important strategy of the host defense during the natural course infection.Our studies firstly uncover the relative of a marine viral gene expression patterns between in vitro and in vivo infection, which provides a better understanding of SGIV transcription regulation and a greater degree shared with other iridoviruses on their repliaction and pathogenesis. Keywords: time course To further characterize SGIV gene expression patterns and to monitor the gene temporal kinetic transcription program on a genome-wide scale, we monitored viral gene expression profiles in vitro and in vivo infection.For the experiment of infection in vitro, GS cell monolayers cultured in 75cm2 flask were inoculated with 1ml of SGIV (5.0 Ã105.5 TCID50/ml) at 25oC. The mock-infected cells (as reference samples) were treated in the same manner as SGIV-infected cells but with fresh culture medium. Total RNA was isolated from the cells at 1, 2, 4, 6, 8, 10, 12, 16, 24, 36, 48, 72, and 96 hours post-infection (h p.i.), respectively. For the experiment of infection in vivo, Grouper Epinephelus tauvina juveniles with approximately 40-50 g were experimentally infected with 150 µl of the SGIV inoculum (5.0Ã105.5 TCID50/ml) and held in tanks supplied with running seawater at 25oC. Control fishes were injected with the same volume of EMEM. Total RNA was harvested from the spleens of 5 fishes randomly selected from the experimental population at 1, 2, 3, 4, 5, 7, 9, 11, and 15 days post-infection (d p.i.). Total RNA from the spleens of 35 mock-infected fishes was used as reference samples. After visual inspection for the presence of image artifacts, such as scratches, dirt, contamination, high region, or overall background on the array, the scanned images were saved as TIF files and further analyzed to generate raw data using SpotDataTM software (CapitalBio). After filtering the low-intensity spots and background-noise value, a global scaling procedure was performed to normalize among the different arrays and the different channels of same arrays using housekeeping gene of piscine 18S RNA which was also spotted in triplicate. To estimate the variance result from dye-bias, a swap-dye strategy was used for the virus-infected and mock-infected samples at 48 h p.i.
Project description:Hepatitis C virus (HCV) infection can result in viral chronicity or clearance. Although host genetics and particularly genetic variation in the interferon lambda (IFNL) locus are associated with spontaneous HCV clearance and treatment success, the mechanisms guiding these clinical outcomes remain unknown. Using a laser capture microdissection-driven unbiased systems virology approach, we isolated and transcriptionally profiled HCV-infected and adjacent primary human hepatocytes (PHH) approaching single cell resolution. An innate antiviral immune signature dominated the transcriptional response, but differed in magnitude and diversity between HCV-infected and adjacent cells. Molecular signatures associated with more effective antiviral control were determined by comparing donors with high and low infection frequencies. Cells from donors with clinically unfavorable IFNL genotypes were infected at a greater frequency and exhibited dampened antiviral and cell death responses. These data suggest that early virus-host interactions, particularly host genetics and induction of innate immunity, critically determine the outcome of HCV infection. Cell populations of primary human hepatocytes were collected via laser capture microdissection, their transcriptomes were amplified and analyzed via whole Illumina genome microarray. Three populations were collected: virus infected cells, cells adjacent to infected cells (“adjacent”) and mock infected cells. Cells from multiple donors were employed to address host genetic variability on our observed phenotypes. Nine different donors were assessed on 1-day post infection and three donors were assessed 3 days post infection and and four donors were assessed on 7 days post infection. For each cell population (virus infected, adjacent or mock), four biological replicate arrays were performed. In total, we analyzed 186 microarrays