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Perturbations of PIP3 signaling trigger a global remodeling of mRNA landscape and reveal a transcriptional feedback loop

(Submitter supplied) PIP3 is synthesized by PI3Ks and regulates complex cell responses, such as growth and migration. Signals that drive long-term reshaping of cell phenotypes are difficult to resolve because of complex feedback networks that operate over extended times. It is clear PIP3-dependent modulation of mRNA accumulation is important in this process but is poorly understood. We have quantified the genome-wide mRNA-landscape of non-transformed, breast epithelium-derived MCF10a cells and its response to transient (EGF or PI3Ka-selective inhibitor) or chronic (isogenic cells expressing an oncomutant PI3Ka allele or lacking the PIP3-phosphatase /tumour-suppressor, PTEN) perturbations of PIP3.These results show that whilst many mRNAs are changed by long-term  genetic perturbation of PIP3 signaling (“butterfly effect”), a much smaller number change with a directional logic that aligns with different PIP3 perturbations, allowing discrimination of more directly regulated mRNAs. more...
Organism:
Homo sapiens
Type:
Expression profiling by high throughput sequencing
Platform:
GPL16791
75 Samples
Download data: TXT

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