Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Genome-wide profiling of gene expression of normal and Tbx20 knockout adult mouse whole heart

ABSTRACT: Tbx20 is a transcription factor important for heart development. To assess the role of Tbx20 in the adult heart, we generated a conditional knockout for this gene, specifically in cardiomyocytes. We profiled gene expression levels using RNA-seq in both normal and knockout adult mouse hearts to identify genes and pathways regulated by Tbx20. The article describing the Tbx20 knockout mouse is under review, a reference will be added when published. Analysis of triplicate mRNA samples of adult mouse, comparing normal and knockout

ORGANISM(S): Mus musculus

SUBMITTER: Noboru Sakabe

PROVIDER: E-GEOD-30943 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Dual transcriptional activator and repressor roles of TBX20 regulate adult cardiac structure and function.

Sakabe Noboru J NJ Aneas Ivy I Shen Tao T Shokri Leila L Park Soo-Young SY Bulyk Martha L ML Evans Sylvia M SM Nobrega Marcelo A MA

Human molecular genetics 20120210 10

The ongoing requirement in adult heart for transcription factors with key roles in cardiac development is not well understood. We recently demonstrated that TBX20, a transcriptional regulator required for cardiac development, has key roles in the maintenance of functional and structural phenotypes in adult mouse heart. Conditional ablation of Tbx20 in adult cardiomyocytes leads to a rapid onset and progression of heart failure, with prominent conduction and contractility phenotypes that lead to ...[more]

PMID: 22328084

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Project description:Three major MAP kinase signaling cascades, ERK, p38 and JNK, play significant roles in the development of cardiac hypertrophy and heart failure in response to external stress and neural/hormonal stimuli. In order to study the specific function of each MAP kinase branch in adult heart, we have generated three transgenic mouse models with cardiac specific and temporally regulated expression of activated mutants of Ras, MKK3 and MKK7, which are selective upstream activators for ERK, p38 and JNK, respectively. Gene expression profiles in transgenic adult hearts were determined using cDNA microarrays at both early (4-7 days) and late (2-4 weeks) time points following transgene induction. From this study, we revealed common changes in gene expression among the three models, particularly involving extracellular matrix remodeling. However, distinct expression patterns characteristic for each pathway were also identified in cell signaling, growth and physiology. In addition, genes with dynamic expression differences between early vs. late stages illustrated primary vs. secondary changes upon MAP kinase activation in adult hearts. These results provide an overview to both short term and long term effects of MAP kinase activation in heart and support some common as well as unique roles for each MAP kinase cascade in the development of heart failure. Experiment Overall Design:MHC-floxed-HRas-v12/MKK3bE/MKK7D transgenic mice were bred with MHC-Mer-Cre-Mer (MCM) mice (from Dr. J. Molkentin, Cincinnati Children's Hospital) to generate double transgenic animals harboring both floxed transgenes and Mer-Cre-Mer transgene. At 12 weeks of age the double transgenic mice and non-transgenic littermate controls were treated via i.p. injection of tamoxifen at a dosage of 20mg/kgBW once a day for 3 consecutive days as reported. The hearts were harvested at an early (4-7 days post first tamoxifen injection) and a late (2-4 weeks) time point. Left ventricles were dissected and rapidly frozen in liquid nitrogen and stored at -80C prior to protein and RNA analysis. Transcription profiling of

Dataset Information

Genome-wide profiling of gene expression of normal and Tbx20 knockout adult mouse whole heart

Publications

Dual transcriptional activator and repressor roles of TBX20 regulate adult cardiac structure and function.

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