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Next Generation Sequencing Quantitative Analysis of TEAD Palmitoylation Inhibitor MGH-CP1 in Breast Cancer Cell Line

ABSTRACT: Purpose: The goal of this study is to understand the signaling pathway alteration in cancer cell line treated with TEAD palmitoylation inhibitor MGH-CP1, and to further validate TEAD inhibitor for specifity in TEAD-YAP interuption. Methods:Breast cancer cell line MDA-MB-231 was chosen to be treated with TEAD palmitoylation inhibitor MGH-CP1 at 10μM for 24 hours. Total RNA was isolated for the analysis. RNA samples were sent to Novogen for library construction, RNA sequencing and raw data process. Results: MGH-CP1 specifically blocks TEAD transcriptional activity compared with YAP/TAZ siRNA in MDA-MB-231 cells. Conclusions: Our study privides gene expression profiling evidence to validate our TEAD palmitoylation inhibitor MGH-CP1 as specific small molecule to block TEAD transcriptional activity. We report the application of next generation sequencing technology for high-throughput profiling of TEAD palmitoylation inhibitor MGH-CP1 in breast cancer cells.

ORGANISM(S): Homo sapiens

PROVIDER: GSE140396 | GEO | 2021/05/11

REPOSITORIES: GEO

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Project description:Uncontrolled Transforming growth factor-beta (TGFβ) signaling promotes aggressive metastatic properties in late-stage breast cancers. However, how TGFβ-mediated cues are directed to induce late-stage tumorigenic events is poorly understood, particularly given that TGFβ has clear tumor suppressing activity in other contexts. Here we demonstrate that the transcriptional regulators TAZ and YAP (TAZ/YAP), key effectors of the Hippo pathway, are necessary to promote and maintain TGFβ-induced tumorigenic phenotypes in breast cancer cells. Interactions between TAZ/YAP, TGFβ-activated SMAD2/3, and TEAD transcription factors reveal convergent roles for these factors in the nucleus. Genome-wide expression analyses indicate that TAZ/YAP, TEADs and TGFβ-induced signals coordinate a specific pro-tumorigenic transcriptional program. Importantly, genes cooperatively regulated by TAZ/YAP, TEAD, and TGFβ, such as the novel targets NEGR1 and UCA1, are necessary for maintaining tumorigenic activity in metastatic breast cancer cells. Nuclear TAZ/YAP also cooperate with TGFβ signaling to promote phenotypic and transcriptional changes in non-tumorigenic cells to overcome TGFβ repressive effects. Our work thus identifies crosstalk between nuclear TAZ/YAP and TGFβ signaling in breast cancer cells, revealing novel insight into late-stage disease-driving mechanisms. Expression profiling was conducted following the repression of the transcriptional regulators TAZ and YAP (TAZ/YAP), the TEAD family of transcription factors (TEAD1/2/3/4), or the TGFb signaling pathway (with SB-431542, an inhibitor of the TBRI recpeptor) in human MDA-MB-231-LM2 breast cancer cells treated with TGFβ1. Human MDA-MB-231-LM2-4 breast cancer cells were transfected with control siRNA, or siRNAs targeting TAZ/YAP or all four TEADs and were treated 24 hours later with 500pM TGFβ1 or 5mM SB-431542 for an additional 24 hours. Total RNA was isolated and twelve microarrays in total were performed, with each condition carried out three times on separate days. The Boston University Microarray Core generated the data using the Affymetrix Human Gene 1.0 St Array.

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Next Generation Sequencing Quantitative Analysis of TEAD Palmitoylation Inhibitor MGH-CP1 in Breast Cancer Cell Line

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