RNA-sequence of epithelial-specific Yap conditional knock out mouse lung
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE126980 | GEO | 2019/07/31
REPOSITORIES: GEO
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Project description:RNA-sequence of epithelial-specific Yap conditional knock out mouse lung
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Project description:Bronchial premalignant lesions (PMLs) are composed of expanding bronchial basal cells that can progress to lung squamous cell carcinoma (LUSC) by evading immune responses. Despite ongoing efforts that have mapped gene expression and cell diversity across bronchial PML pathologies, signaling and transcriptional events driving malignancy are poorly understood. Evidence has suggested key roles for the Hippo pathway effectors YAP and TAZ and associated TEAD and TP63 transcription factor families in bronchial basal cell biology and LUSC. In this study we mapped target genes regulated by these factors by combined RNA-seq and ChIP-seq in primary human bronchial epithelial cells, revealing a converged transcriptional network that is strongly associated with bronchial PML progression. Our observations suggest that YAP/TAZ-TEAD-TP63 associate to cooperatively promote basal cell proliferation and repress signals associated with interferon responses and immune cell communication. Directly repressed targets include MHC Class II factors expressed in bronchial epithelium that correlate with adaptive immune Th1 cell activities known to contribute to the immunosuppressive microenvironment in lung cancers. Our findings provide a molecular mechanism for gene regulation in progressive PMLs that contributes to immune evasion, offering potential new avenues for lung cancer interception.
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Project description:Bronchial premalignant lesions (PMLs) are composed of expanding bronchial basal cells that can progress to lung squamous cell carcinoma (LUSC) by evading immune responses. Despite ongoing efforts that have mapped gene expression and cell diversity across bronchial PML pathologies, signaling and transcriptional events driving malignancy are poorly understood. Evidence has suggested key roles for the Hippo pathway effectors YAP and TAZ and associated TEAD and TP63 transcription factor families in bronchial basal cell biology and LUSC. In this study we mapped target genes regulated by these factors by combined RNA-seq and ChIP-seq in primary human bronchial epithelial cells, revealing a converged transcriptional network that is strongly associated with bronchial PML progression. Our observations suggest that YAP/TAZ-TEAD-TP63 associate to cooperatively promote basal cell proliferation and repress signals associated with interferon responses and immune cell communication. Directly repressed targets include MHC Class II factors expressed in bronchial epithelium that correlate with adaptive immune Th1 cell activities known to contribute to the immunosuppressive microenvironment in lung cancers. Our findings provide a molecular mechanism for gene regulation in progressive PMLs that contributes to immune evasion, offering potential new avenues for lung cancer interception.
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Project description:Gene expression was compared between wild type forestomach and hindstomach epithelial cells at embryonic day E14.5. Gene expression was compared between GATA4 knock out hindstomach epithelial cells and wild type hindstomach epithelial cells at embryonic day E14.5. Gene expression was compared between GATA4 knock in forestomach epithelial cells and wild type forestomach epithelial cells at embryonic day E14.5.
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Project description:Proper lung function relies on precisely balanced numbers of specialized epithelial cell types that work together and are maintained in homeostasis. We describe essential roles for the transcriptional regulators Yap and Taz, which are key effectors of Hippo pathway signaling, in maintaining lung epithelial homeostasis. We report that conditional deletion of Yap1/Yap and Wwtr1/Taz in the lung epithelium of adult mice results in severe defects with consequent animal lethality. Phenotypes associated with Yap/Taz deletion include alveolar defects and a striking development of goblet cell metaplasia throughout the airways. We performed gene expression analysis of wild type and Yap/Taz null primary mouse airway epithelial cells in order to define Yap/Taz controlled gene expression.
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Project description:Microarray analyses with cells/tissues overexpressing YAP have revealed many transcription targets of YAP (Dong et al, 2007; Zhao et al, 2008). However, as YAP induces transformation of non-cancerous cells, we thought many of known targets of YAP may be indirect consequence of transforming property of YAP. To identify the immediate transcription targets for YAP, we utilized immortalized mammary epithelial MCF-10A cells expressing a tamoxifen inducible, hyperactive (S127/381A) YAP mutant (MCF-10A ERT2-YAP 2SA). MCF-10A ERT2 and MCF-10A ERT2-YAP 2SA are generated. Each cell line was treated with 0.1% of ethanol (solvent) or 1uM of 4-hydroxytamoxifen for 2 or 6 hours. This makes 6 samples per set. The experiments were done in duplicate. The expression data from MCF-10A ERT2 and MCF-10A ERT2-YAP 2SA before tamoxifen treatment can serve as control.
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Project description:YAP is an oncogene and an inducer of Epithelial-to-Mesenchymal Transition (EMT). We used microarrays to detail the global program of gene expression to identify YAP target genes. PUBLICATION ABSTRACT:; The Hippo pathway defines a novel signaling cascade regulating cell proliferation and survival in Drosophila, which involves the negative regulation of the transcriptional coactivator Yorkie by the kinases Hippo and Warts. We have recently shown that the human ortholog of Yorkie, YAP, maps to a minimal amplification locus in mouse and human cancers, and that it mediates dramatic transforming activity in MCF10A primary mammary epithelial cells. Here we show that LATS proteins (mammalian orthologs of Warts) interact directly with YAP in mammalian cells and that ectopic expression of LATS1, but not LATS2, effectively suppresses the YAP phenotypes. Furthermore, shRNA-mediated knockdown of LATS1 phenocopies YAP overexpression. Since this effect can be suppressed by simultaneous YAP knockdown, it suggests that YAP is the primary target of LATS1 in mammalian cells. Expression profiling of genes induced by ectopic expression of YAP or by knockdown of LATS1 reveals a subset of potential Hippo pathway targets implicated in epithelial-to-mesenchymal transition (EMT), suggesting that this is a key feature of YAP signaling in mammalian cells. Experiment Overall Design: MCF10A cells were infected with retrovirus constructs (vector or YAP) and puromycin was used to select for transduced cells. Cells were split and grown to ~60-75%% confluency at which point they were harvested for RNA. Vector vs. YAP comparison was done in duplicate.
2008-06-11 | E-GEOD-10196 | biostudies-arrayexpress
Project description:Proper lung function relies on precisely balanced numbers of specialized epithelial cell types that work together and are maintained in homeostasis. In this study we have described essential roles for the transcriptional regulators YAP and TAZ, which are key effectors of Hippo pathway signaling, in maintaining lung epithelial homeostasis. Phenotypes associated with Yap/Taz deletion include alveolar defects and a striking development of goblet cell metaplasia throughout the airways. Knockdown of YAP and TAZ in HBECs similarly drives mucin expression. The TEAD family of transcription factors are well characterized partners of the YAP/TAZ transcriptional effectors, and we have found that knockdown of TEAD1-4 similarly drives elevated mucin expression. In order to further understand the role of the TEAD transcription factors in human lung epithelial cell fate, we conducted TEAD Chromatin Immunopreciptitation (ChIP)-Sequencing.
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