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Liver gene expression profiling of transforming growth factor beta receptor 2 heterozygous knockout (Tgfbr2+/-) mice

ABSTRACT: Transforming growth factor beta receptor 2 (Tgfbr2) was predicted as a causal gene for abdominal using a novel statistical method named LCMS (Schadt et al., 2005, Nature Genetics). In order to validate this prediction, we profiled the liver tissues of Tgfbr2 heterozygous knockout mice (Tgfbr2+/-) and their littermate wild-type (wt) controls to examine the gene expression signature as well as pathways/networks resulting from the single gene perturbation.

ORGANISM(S): Mus musculus

PROVIDER: GSE11994 | GEO | 2009/03/08

SECONDARY ACCESSION(S): PRJNA109267

REPOSITORIES: GEO

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Liver gene expression profiling of transforming growth factor beta receptor 2 heterozygous knockout (Tgfbr2+/-) mice

Project description:Transforming growth factor beta receptor 2 (Tgfbr2) was predicted as a causal gene for abdominal using a novel statistical method named LCMS (Schadt et al., 2005, Nature Genetics). In order to validate this prediction, we profiled the liver tissues of Tgfbr2 heterozygous knockout mice (Tgfbr2+/-) and their littermate wild-type (wt) controls to examine the gene expression signature as well as pathways/networks resulting from the single gene perturbation. 6 Tgfbr2+/- mice and 4 wt controls were profiled. Reference pool included RNA extracted from the liver of 6 wt control mice. Dye-swap was involved in the profiling.

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Project description:Zinc finger binding protein 90 (Zfp90) was predicted as a causal gene for abdominal using a novel statistical method named LCMS (Schadt et al., 2005, Nature Genetics). In order to validate this prediction, we profiled the liver tissues of Zfp90 transgenic mice (Zfp90 tg) and their littermate wild-type (wt) controls to examine the gene expression signature as well as pathways/networks resulting from the single gene perturbation.

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Liver gene expression profiling of complement component 3a receptor 1 knockout (C3ar1-/-) mice

Project description:Complement component 3a receptor 1 (C3ar1) was predicted as a causal gene for abdominal using a novel statistical method named LCMS (Schadt et al., 2005, Nature Genetics). In order to validate this prediction, we profiled the liver tissues of complement component 3a receptor 1 knockout (C3ar1-/-) mice and their littermate wild-type (wt) controls to examine the gene expression signature as well as pathways/networks resulting from the single gene perturbation.

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SILAC-Based Quantification of TGFBR2-Dependent Protein Expression in Extracellular Vesicles of Microsatellite Unstable Colorectal Cancers

Project description:Microsatellite unstable (MSI) colorectal cancers (CRCs) are characterized by Transforming Growth Factor Beta Receptor Type 2 (TGFBR2) deficiency. TGFBR2-deficient CRCs present altered target gene and protein expression. Such cellular alterations modulate the content of CRC-derived extracellular vesicles (EVs). EVs function as couriers of proteins, nucleic acids, and lipids in intercellular communication. At a qualitative level, we have previously shown that TGFBR2 deficiency can cause overall alterations in the EV protein content. To deepen the basic understanding of altered protein dynamics, this work aimed to quantify EV protein signatures in a TGFBR2-dependent manner. Using a SILAC approach for mass spectrometry-based quantification, 48 proteins that appeared to be regulated by cellular TGFBR2 expression were identified in MSI-derived EVs. TGFBR2-primed EVs were enriched in proteasome-associated proteins, whereas TGFBR2 deficiency led to upregulation of EV proteins related to the extracellular matrix and nucleosome. Altogether, the present study emphasizes the general overlap of proteins between EVs and their parental CRC cells and highlights the pathological role of the MSI tumor driver mutation affecting TGFBR2 by altering protein landscapes of EVs. From a clinical perspective, TGFBR2-regulated quantitative differences of protein expression in EVs might nominate novel biomarkers for liquid biopsy-based MSI typing in the future.

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