Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Investigation of gene expression signature induced by Alk5TD (active type I TGF-beta receptor)

ABSTRACT: BT474 cells stably expressing Alk5TD or vector (BT474-Alk5TD and BT474-pBMN, respectively) were compared for gene expression. Genes that were differentially expressed between the two cell lines were collected as the signature induced by Alk5TD expression. Keywords: Comparison of two cell types (BT474-Alk5TD and BT474-pBMN). BT474-pBMN was used as the reference line. RNA samples extracted from the two cell lines (BT474-Alk5TD and BT474-pBMN) were differentially labeled (BT474-Alk5TD with Cy5 and BT474-pBMN with Cy3) and analyzed. The experiment was performed in triplicate with independent samples.

ORGANISM(S): Homo sapiens

SUBMITTER: Shizhen Emily Wang

PROVIDER: E-GEOD-11293 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Transforming growth factor beta engages TACE and ErbB3 to activate phosphatidylinositol-3 kinase/Akt in ErbB2-overexpressing breast cancer and desensitizes cells to trastuzumab.

Wang Shizhen Emily SE Xiang Bin B Guix Marta M Olivares Maria Graciela MG Parker Joel J Chung Christine H CH Pandiella Atanasio A Arteaga Carlos L CL

Molecular and cellular biology 20080714 18

In HER2-overexpressing mammary epithelial cells, transforming growth factor beta (TGF-beta) activated phosphatidylinositol-3 kinase (PI3K)/Akt and enhanced survival and migration. Treatment with TGF-beta or expression of an activated TGF-beta type I receptor (Alk5 with the mutation T204D [Alk5(T204D)]) induced phosphorylation of TACE/ADAM17 and its translocation to the cell surface, resulting in increased secretion of TGF-alpha, amphiregulin, and heregulin. In turn, these ligands enhanced the as ...[more]

PMID: 18625725

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Project description:Prenatal Human Cytomegalovirus (HCMV) infection often causes CNS maldevelopment. In a murine model, we detect Murine Cytomegalovirus (MCMV) in brain following intra-peritoneal inoculation at birth. Infected mice show impaired cerebellar development and impaired neurologic function on a beam balance test as adults. Among developmental genes differentially regulated, hindbrain expression of the homeodomain transcription factor HOXa5 was reduced with infection, and fewer HOXa5 expressing neurons were found in vestibular nuclei. Based on the hypothesis that immune activation connects focal viral infection and global CNS maldevelopment, we defined the components of CNS immune response. Flow cytometry showed a large increase in both number and activation of CNS monocytes. Monocytes were found in close association with infected cells by immunohistochemistry (IHC). Oligonucleotide microarrays contained herein identified many differentially expressed genes related to innate immune response. Chemokines, cytokines, cell surface receptors, and proteases are some of the many immunological genes shown to be differentially regulated by MCMV infection. These results together show that MCMV infection induces a complex immune response associated with changes in developmental gene expression and lasting neurologic defecit. Keywords: disease state comparison (virus infection) and competetive hybridization for expression analysis Previous work empirically determined the kinetics of viral spread to and replication in the Balb-C murine CNS. Balb-C mice were inoculated intra-peritoneally at birth, and harvested at 5, 8, 12, and 21 days post inoculation for cerebellar experiments. Controls were mock infected with vehicle (DMEM cell growth media) and harvested at the same timepoints. Each microarray was a two channel MEEBO array, upon which labeled and reverse transcribed cDNA from 3 pooled infected cerebella and three pooled uninfected cerebella competetively hybridized. Three unique biological replicates were performed with day 5 cDNA, 5 unique biological replicates at day 8, 5 unique biological replicates at day 12, and 4 unique biological replicates at day 21. For the analysis, colors channels were seperated and treated as independent hybridizations. However, since the experiments were dual channel, the primary data may be employed to generate ratio based measurements, and each sample is provided a corresponding number that can be used to pair the processed data and derive ratios (mock 3, infected 3). Mice were similarly inoculated and harvested at 5, 15, and 21 days post natal for liver tissue analysis. Inoculation was performed by injection with a microsyringe of 50ul titered virus delivering 500-1000 PFU per animal.

Dataset Information

Investigation of gene expression signature induced by Alk5TD (active type I TGF-beta receptor)

Publications

Transforming growth factor beta engages TACE and ErbB3 to activate phosphatidylinositol-3 kinase/Akt in ErbB2-overexpressing breast cancer and desensitizes cells to trastuzumab.

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