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Focal Adhesion Kinase Dependent Expression

ABSTRACT: The goal of this study was to identify transcripts, which are differentially regulatulated in the presence and absence of Focal Adhesion Kinase. As Focal Adhesion Kinase activity can depend upon cell density (Snijder et al. Nature 2009), biological replicates where cells, were seeded very sparsely or confluently, were used.

ORGANISM(S): Mus musculus

PROVIDER: GSE43873 | GEO | 2013/09/17

SECONDARY ACCESSION(S): PRJNA187977

REPOSITORIES: GEO

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Focal Adhesion Kinase Dependent Expression

Project description:The goal of this study was to identify transcripts, which are differentially regulatulated in the presence and absence of Focal Adhesion Kinase. As Focal Adhesion Kinase activity can depend upon cell density (Snijder et al. Nature 2009), biological replicates where cells, were seeded very sparsely or confluently, were used. Focal Adhesion Kinase Knockout (ATCC CRL-2644) and Rescue Cells (Sieg et al. 1998, clone DA2) were seeded at two different concentrations. Replicas refer to biological replicates, performed on different days. Only one single technical replicate has been done per biological replicate.

2013-09-17 | E-GEOD-43873 | biostudies-arrayexpress

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Fibroblast-specific focal adhesion kinase links mechanical force to fibrosis via chemokine-mediated inflammatory pathways

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Focal adhesion kinase inhibition synergizes with nab-paclitaxel to target pancreatic ductal adenocarcinoma

Project description:Aberrant tyrosine kinase activity can influence tumor growth and is regulated by phosphorylation. Pancreatic ductal adenocarcinoma (PDAC) is a very lethal disease, with minimal therapeutic options. We investigated phosphorylated kinases as target in PDAC. Mass spectrometry-based phosphoproteomic analysis was performed of PDAC cell lines to evaluate active kinases. Pathway analysis and inferred kinase activity was performed to identify novel targets. We investigated targeting of focal adhesion kinase in vitro with drug perturbations in combination with chemotherapeutics used against PDAC. Phosphoproteome analysis upon treatment was performed to evaluate signaling..PDAC cell lines portrayed high activity of multiple receptor tyrosine kinases. Non-receptor kinase, focal adhesion kinase (FAK), was identified in all cell lines by our phosphoproteomic screen and pathway analysis. Targeting of this kinase with defactinib validated reduced phosphorylation profiles. Additionally, FAK inhibition had anti-proliferative and anti-migratory effects. Combination with (nab-)paclitaxel had a synergistic effect on cell proliferation in vitro and reduced tumor growth in vivo. In conclusion, our study shows a high phosphorylation of several oncogenic receptor tyrosine kinases in PDAC cells and validated FAK inhibition as potential synergistic target with Nab-paclitaxel

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Fibroblast-specific focal adhesion kinase links mechanical force to fibrosis via chemokine-mediated inflammatory pathways

Project description:Hypertrophic scar (HTS) formation is characterized by exuberant fibroproliferation for reasons that remain poorly understood1. One important but often overlooked component of wound repair is mechanical force, which regulates reciprocal cell-matrix interactions through focal adhesion components including focal adhesion kinase (FAK)1,2. Here we report that FAK is activated following cutaneous injury and that this activation is potentiated by mechanical loading. Transgenic mice lacking fibroblast-specific FAK exhibit significantly less fibrosis in a preclinical model of HTS formation. Inflammatory pathways involving monocyte chemoattractant protein-1 (MCP-1), a chemokine highly implicated in human skin fibrosis3, are triggered following FAK activation, mechanistically linking physical force to fibrosis. Further, small molecule inhibition of FAK effectively abrogates fibroproliferative mechanisms in human cells and significantly reduces scar formation in vivo. Collectively, these findings establish a molecular basis for HTS formation based on the mechanical activation of fibroblast-specific FAK and demonstrate the therapeutic potential of targeted mechanomodulatory strategies. Wildtype murine tissue was harvested at either day 6 or 14 post-injury following 48 hours or 10 days of mechanical loading, respectively (n=4 mice per group per time point). Murine RNA was isolated, labeled, and hybridized to the GeneChip microarray according to the manufacturer’s protocols (Affymetrix, Santa Clara, CA, USA). Each gene in the microarray was represented by 20 oligonucleotide pairs, with each pair consisting of an oligonucleotide perfectly matched to the cDNA sequence, and a second oligonucleotide containing a single base mismatch. Raw microarray data (sample intensity files) were processed using GeneSpring GX 11.0 (Agilent Technologies Inc., Santa Clara, CA, USA).

2011-01-14 | E-GEOD-26390 | biostudies-arrayexpress

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