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Determination of a comprehensive alternative splicing regulatory network and the combinatorial regulation by key factors during Epithelial-to-Mesenchymal Transition

ABSTRACT: This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

ORGANISM(S): Homo sapiens

SUBMITTER: Yi Xing

PROVIDER: E-GEOD-75492 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Determination of a comprehensive alternative splicing regulatory network and the combinatorial regulation by key factors during Epithelial-to-Mesenchymal Transition [EMT.time course]

Project description:The epithelial to mesenchymal transition (EMT) is an essential biological process during embryonic development and has also been implicated in cancer metastasis. Previous studies have characterized transcriptional regulation and key transcription factors that impact EMT. However, the role of alternative splicing (AS) regulation in EMT has only recently emerged and remains relatively uncharacterized. Here we used a robust in vitro EMT model to dynamically and comprehensively characterize splicing switches during EMT in a temporal manner. We generated a H358 clone stably expressing a doxycycline (Dox)-inducible cDNA encoding a Zeb1-mCherry fusion protein. Over a 7-day time course following Dox treatment, cells have undergone EMT. We harvested total RNA and protein at each day of the EMT time course and a no Dox-treated control in biological triplicates. We made cDNA libraries for each replicate and subjected them to RNA-seq.

2016-04-05 | E-GEOD-75487 | biostudies-arrayexpress

Determination of a comprehensive alternative splicing regulatory network and the combinatorial regulation by key factors during Epithelial-to-Mesenchymal Transition [ESRP KD]

Project description:Epithelial specific splicing regulatory protein 1 and 2 (ESRP1 and ESRP2) are important regulators of alternative splicing during EMT. To study the alternative splicing events regulated by ESRP1/2 at a genome wide scale, we used lentiviral shRNAs to knockdown ESRP1/2 in H358 cells and performed RNA-seq in biological triplicates. We used lentiviral based shRNAs targeting ESRP1 and ESRP2 to knockdown both regulators in human H358 cells. We harvested total RNA and protein from ESRP1/2 knockdown and control knockdown in biological triplicates. We made cDNA libraries for each replicate and subjected them to RNA-seq.

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Determination of a comprehensive alternative splicing regulatory network and the combinatorial regulation by key factors during Epithelial-to-Mesenchymal Transition [RBM47 KD]

Project description:RBM47 is a RNA binding protein that is known to regulate alternative splicing. To study the genome wide regulatory role of RBM47 in alternative splicing and determine the potential function of RBM47 during EMT, we used lentiviral shRNAs to knockdown RBM47 in H358 cells and performed RNA-seq in biological triplicates. We used lentiviral based shRNAs to knockdown RBM47 in human H358 cells. We harvested total RNA and protein from RBM47 knockdown and control knockdown in biological triplicates. We made cDNA libraries for each replicate and subjected them to RNA-seq.

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Determination of a Comprehensive Alternative Splicing Regulatory Network and Combinatorial Regulation by Key Factors during the Epithelial-to-Mesenchymal Transition.

Project description:The epithelial-to-mesenchymal transition (EMT) is an essential biological process during embryonic development that is also implicated in cancer metastasis. While the transcriptional regulation of EMT has been well studied, the role of alternative splicing (AS) regulation in EMT remains relatively uncharacterized. We previously showed that the epithelial cell-type-specific proteins epithelial splicing regulatory proteins 1 (ESRP1) and ESRP2 are important for the regulation of many AS events that are altered during EMT. However, the contributions of the ESRPs and other splicing regulators to the AS regulatory network in EMT require further investigation. Here, we used a robust in vitro EMT model to comprehensively characterize splicing switches during EMT in a temporal manner. These investigations revealed that the ESRPs are the major regulators of some but not all AS events during EMT. We determined that the splicing factor RBM47 is downregulated during EMT and also regulates numerous transcripts that switch splicing during EMT. We also determined that Quaking (QKI) broadly promotes mesenchymal splicing patterns. Our study highlights the broad role of posttranscriptional regulation during the EMT and the important role of combinatorial regulation by different splicing factors to fine tune gene expression programs during these physiological and developmental transitions.

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Determination of a comprehensive alternative splicing regulatory network and the combinatorial regulation by key factors during Epithelial-to-Mesenchymal Transition

Project description:This SuperSeries is composed of the SubSeries listed below.

2016-04-05 | GSE75492 | GEO

Determination of a comprehensive alternative splicing regulatory network and the combinatorial regulation by key factors during Epithelial-to-Mesenchymal Transition [EMT.time course]

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Determination of a comprehensive alternative splicing regulatory network and the combinatorial regulation by key factors during Epithelial-to-Mesenchymal Transition [RBM47 KD]

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Determination of a comprehensive alternative splicing regulatory network and the combinatorial regulation by key factors during Epithelial-to-Mesenchymal Transition [ESRP KD]

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Multiphasic and dynamic changes in alternative splicing during induction of pluripotency are coordinated by numerous RNA binding proteins [ESRP DKO]

Project description:Alternative splicing (AS) plays a critical role in cell fate transitions, development and disease. Recent studies have shown that AS also influences pluripotency and somatic cell reprogramming. We profiled transcriptome-wide AS changes that occur during reprogramming of fibroblasts to pluripotency. This analysis revealed distinct phases of AS during reprogramming, including a splicing program that is unique to transgene-independent iPS cells. Changes in the expression of alternative splicing factors Zcchc24, Esrp1, Mbnl1/2 and Rbm47 were demonstrated to be key contributors to phase-specific AS. RNA binding motif enrichment analysis near alternatively spliced exons provided further insight into the combinatorial regulation of AS during reprogramming by different RNA binding proteins. Ectopic expression of Esrp1 enhanced reprogramming, in part by modulating the AS of the epithelial specific transcription factor Grhl1.These data represent a comprehensive temporal analysis of the dynamic regulation of AS during the acquisition of pluripotency. ES cells from 3 independent E3.5 blastocysts from either Control (Esrp1 WT/WT; Esrp2 -/-) or Esrp DKO (Esrp1 floxed/floxed; Esrp2 -/-) were transfected with pLVX-EGFP-Cre, puro selected and RNA was isolated 6 days later.

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Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

2016-03-15 | E-GEOD-76233 | biostudies-arrayexpress