Natural SIV infection of sooty mangabeys (SMs) does not progress to disease despite chronic virus replication. In contrast to pathogenic SIV infection of rhesus macaques (RMs), chronic SIV infection of SMs is characterized by low immune activation. To elucidate the mechanisms underlying this phenotype, we longitudinally assessed host gene expression in SIV-infected SMs and RMs. We found that acute SIV infection of SMs is consistently associated with a robust innate immune response, including widespread up-regulation of interferon-stimulated genes (ISGs). Our findings indicate that active immune regulatory mechanisms, rather than intrinsically attenuated innate immune responses, underlie the low immuneactivation of chronically SIV-infected SMs.
Global genomic analysis reveals rapid control of a robust innate response in SIV-infected sooty mangabeys.
Sex, Specimen part
View SamplesTranscriptional Profiling Reveals Distinguishing Features of Immune Activation in the Lymphatic Tissues of Sooty Mangabeys and Rhesus Macaques in Early SIV Infection
Global genomic analysis reveals rapid control of a robust innate response in SIV-infected sooty mangabeys.
Specimen part
View SamplesChlorpyrifos is an organophosphorus insecticide that despite imposed restricitions on its use by the EPA, is one of the most commonly used insecticides. Although CPF is so widely used little is known about its effect on overall gene expression in vivo.
Subtoxic chlorpyrifos treatment resulted in differential expression of genes implicated in neurological functions and development.
Sex
View SamplesThe study was performed using primary rat hepatocyte in culture from 4 adult male Sprague-Dawley rats to investigate the changes in gene expression under low dose (4M) and short exposure (3hrs) of cadmium chloride. By comparing the gene expression profiles of control and cadmium-treated cells, the most dramatic and significant changes were for those genes associated with transcriptional regulation, antioxidant response and control of protein integrity. Changes in other genes involved in cellular physiological responses such as inflammation, growth and apoptosis were also observed. Results were further confirmed by quantitative real time polymerase chain reaction (qRT-PCR).
Early sensing and gene expression profiling under a low dose of cadmium exposure.
Time
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Complementary transcriptomic, lipidomic, and targeted functional genetic analyses in cultured Drosophila cells highlight the role of glycerophospholipid metabolism in Flock House virus RNA replication.
Cell line
View SamplesVirus infections induce cellular gene up and down regulation, and these changes often provide clues to cellular pathways utilized by viruses.
Complementary transcriptomic, lipidomic, and targeted functional genetic analyses in cultured Drosophila cells highlight the role of glycerophospholipid metabolism in Flock House virus RNA replication.
Cell line
View SamplesVirus infections induce cellular gene up and down regulation, and these changes often provide clues to cellular pathways utilized by viruses.
Complementary transcriptomic, lipidomic, and targeted functional genetic analyses in cultured Drosophila cells highlight the role of glycerophospholipid metabolism in Flock House virus RNA replication.
Cell line
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Ing1 functions in DNA demethylation by directing Gadd45a to H3K4me3.
Sex, Specimen part, Cell line
View SamplesING1b and GADD45a are nuclear proteins involved in the regulation of cell growth, apoptosis and DNA repair. We found that ING1b and GADD45a physically and functionally interact in the epigenetic regulation of specific target genes. In order to characterise the functional ING1b-GADD45a interaction, we performed a gain-of-function experiment in HEK293T cells by individual and combinatorial plasmid transfections and then analysed the transcriptional response via expression microarray profiling.
Ing1 functions in DNA demethylation by directing Gadd45a to H3K4me3.
Cell line
View SamplesWe report that Dnmt1 is crucial during perinatal intestinal development. Loss of Dnmt1 in intervillus progenitor cells causes global hypomethylation, DNA damage, premature differentiation, and apoptosis, and consequently, loss of nascent villi. We further confirm the critical role for Dnmt1 during crypt development using the in vitro organoid culture system, and illustrate a clear differential requirement for Dnmt1 in immature versus mature organoids. These results demonstrate an essential role for Dnmt1 in maintaining genomic stability during intestinal development and the establishment of intestinal crypts. Overall design: We performed RNA-Seq of control and Dnmt1-ablated intestinal progenitor cells isolated from parrafin embedded tissues by laser capture microdissection (LCM).
Dnmt1 is essential to maintain progenitors in the perinatal intestinal epithelium.
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