Dengue virus (DENV) infection causes profound changes in the host cells and these changes underlie the immune response-based viral clearance and pathogenesis. There are several major cell/tissue types relevant for DENV pathogenesis in vivo, including immune cells, liver, and vascular endothelial cells. We applied a directed differentiation system that produces hepatocyte-like cells (HLCs) from pluripotent stem cells to investigate various aspects of DENV- hepatic cells interaction. Human embryonic stem cells were resistant to DENV infection while progeny hepatic cells were permissive. The transition to DENV permissiveness coincided with the upregulation of entry factors for the virus. Infection of HLCs by DENV was self-limiting due to the activation of the interferon (IFN) pathways, which protected by-stander cells from infection but failed to induce the same level of interferon-induced genes (ISGs) expression in the infected cells due to the subversion of IFN signaling by DENV. Innate immunity also protected the infected cells from virus-induced apoptosis. Furthermore, DENV infection activated the NF-?B pathway, increased production of reactive oxidative species (ROS), and led to production of inflammatory cytokines which may contribute to the cytokine storm implicated in dengue hemorrhagic fever (DHF). Finally, DENV infection of HLCs resulted several in vitro phenotypes that may have relevance for acute liver failure and vascular permeability during DHF. These include the disruption of adherens junctions and the downregulation of many liver specific genes such as albumin (ALB) and coagulation factor V (F5).
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Sex, Age, Specimen part, Disease, Cell line
View SamplesViral and bacterial coinfections are common in nature, but infrequently studied in laboratory models of infection. We observed disease severity differences in mice infected with two of three possible respiratory viruses, depending on the order of the infection. To discover the mechanisms causing these differences, we compared gene expression responses of lung tissue at three time points following viral coinfection. Differential gene expression and immune cell counts suggest a dampening of immune responses in mice infected with rhinovirus followed by influenza A virus or pneumonia virus of mice.
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Sex, Specimen part, Cell line, Treatment
View SamplesMale broilers from two lines (n=10 per line) with different growth rate were raised at the same condition with free access to feed and drink. At day 6 and day 21, half samples of each broiler line were euthanized by cervical dislocation, and left ventricles were collected for RNA isolation. Gene expression in left ventricle was measured by RNA-seq and compared between different time points and chicken lines. The purpose of this study is to investigate gene expression change during broiler cardiac development and to compared gene expression between fast-growing modern broilers and slow-growing heritage broilers to find possible genes and pathways related to differential cardiac development and differential susceptibility to cardiac diseases between the two broiler lines.
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Sex, Specimen part, Disease
View Samplesbroilers heat stress.
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Sex, Age, Specimen part
View SamplesWe used isolated zygotene meiocytes, corresponding anthers and 2-week-old seedlings from the Zea mays inbred line Mo17 for RNA extraction and library construction for sequencing with Illumina technology to gain insight on gene expression during a key step in meiosis when recombination initiates.
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Age, Specimen part
View SamplesPseudomonas aeruginosa transcriptomic profile exposed to Cr(VI)
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Specimen part, Disease
View SamplesCommon transcriptional responses of Arabidopsis thaliana protoplasts transfected with turnip crinkle virus (TCV) , hibiscus chlorotic ringspot virus (HCRSV) and their coat protein mutants.
Common transcriptional responses of Arabidopsis thaliana protoplasts transfected with TCV, HCRSV and their coat protein mutants
Specimen part, Time
View SamplesAlthough a wide range of interactions between BRs and auxin have been recognized, knowledge about the direct molecular mechanism of interaction between them in specific physiological processes is very limited. In this study we found that auxin resisitent mutant msg2/iaa19 and arf7 were also resisitant to the BR effect on morphogenensis of dark-grown Arabidosis seedlings. Moreover, BR signaling transcription factor BZR1 can directly bind to promoter regions of IAA19 and ARF7.
Brassinosteroids regulate the differential growth of Arabidopsis hypocotyls through auxin signaling components IAA19 and ARF7.
Specimen part, Treatment
View SamplesArabidopsis thaliana Transcriptome (Vv-circATS1-OE and WT under 4?)
No associated publication
Specimen part
View SamplesWe compared the Galpha13 knockout and wild type mouse embryonic stem cells (cell line CJ7) to analyse the gene expression levels using Affymatrix mouse MGU_74Av2 array
Gene Expression Analysis of Galpha13-/- Knockout Mouse Embryos Reveals Perturbations in Galpha13 Signaling Related to Angiogenesis and Hypoxia
Specimen part, Cell line, Time
View Samples