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Transcriptional analysis of select CfMNPV genes and some antisense transcripts by an oligonucleotide microarray

ABSTRACT: Transcriptional analysis of select CfMNPV genes and some antisense transcripts by an oligonucleotide microarray

PROVIDER: PRJNA95537 | ENA |

REPOSITORIES: ENA

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Transcriptional analysis of select CfMNPV genes and some antisense transcripts by an oligonucleotide microarray

Project description:The temporal expression of the 23 CfMNPV genes representing all four temporal classes including its 7 unique genes were determined by a modified oligonucleotide-based two-channel DNA microarray. Transcription of the non-coding (antisense) strands of some of the CfMNPV select genes including the polyhedrin gene was also detected by the array analysis. The expression of four host genes varied several fold throughout virus infection. The microarray chip contained oligonucleotide probes for 23 CfMNPV ORFs and their complements. We first developed a novel normalization protocol using Cy5-labeled CfMNPV viral genomic DNA (vgDNA) as equimolar reference standards for each probe in order to overcome the inherent variability problem of the traditional microarray normalization procedures including use of internal standards. Cy3-labeled cDNA was from total RNA isolated at different times post infection of Cf203 insect cells infected with CfMNPV. Host genes were unsuitable for normalization between microarrays. The DNA microarray results were selectively validated by quantitative RT-PCR (qRT-PCR). The nature of the polyhedrin antisense transcription was further investigated using long range RT-PCR analysis. Keywords: Time course, detection of antisense transcripts, viral genomic DNA normalization

2007-05-01 | GSE4783 | GEO

Transcriptional analysis of select CfMNPV genes and some antisense transcripts by an oligonucleotide microarray

2007-05-01 | E-GEOD-4783 | biostudies-arrayexpress

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Natural antisense transcripts accumulate for over 70% of maize genes and exhibit genotypic-specific expression patterns

Project description:Natural Antisense Transcripts (NATs) can regulate gene expression by virtue of their ability to form double-stranded RNA duplexes. To investigate NATs in the maize transcriptome, cDNAs from seedling of two inbred lines (B73 and Mo17) were hybridized to an oligonucleotide microarray designed to validate the expression of in silico detected NATs and to screen for NATs that can anneal to a random set of 3’ UTRs and selected repeats found in 3’ UTRs regions. Quantitative Real-Time PCR experiments were conducted to determine the minimum detection threshold of microarray experiment and to thereby identify genes for which both sense and antisense transcripts accumulate to detectable levels. Two independent approaches, strand-specific RT-PCR and S1 nuclease assays were conducted to validate the results of the microarray experiment. Based on these conservative assays, NATs accumulate in seedlings that can anneal to over 70% of a random set of maize genes. In addition, both sense and antisense transcripts anneal to more than 80% of a set of maize repeats. Significantly, sense and antisense transcripts exhibit significant different expression patterns between the two genotypes. Based on these findings we hypothesize that interactions between sense and antisense transcripts may contribute to the differential patterns of gene expression in maize hybrids and to heterosis. Keywords: Global antisense transcripts profiling between two maize inbreds

2008-10-09 | GSE7608 | GEO

Liver proteome upon in vivo N-acetylgalactosamine-conjugated antisense oligonucleotide silencing of ceramide synthase 2

Project description:Mouse liver proteome was investigated upon in vivo mouse treatment with a N-acetylgalactosamine-conjugated antisense oligonucleotide engineered to silence ceramide synthase 2 specifically in hepatocytes in vivo. The data is a part of a study on the involvement of ceramide enzymatic machinery in cardiovasular disorders and its potential as a target for the disease treatment.

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