Compare transcriptional profile of AXL knockdown cell and AXL wild type cell
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PROVIDER: PRJNA518770 | ENA |
REPOSITORIES: ENA
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Project description:Mll2 (ALR) is a histone 3 lysine 4 trimethyltransferase to function as gene activation.In our study, we found that Mll2 is vital for proper control of proliferation and lineage differentiation of mouse ESCs, particularly towards the cardiac-specific lineages. We used microarrays to detail the global programme of gene expression to compare the difference after Mll2 knockdown in E14 cell lines.
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Project description:AXL is activated by its ligand GAS6 and is expressed in triple-negative breast cancer cells. We report that AXL is also detected in HER2+ breast cancer specimens where its expression correlates with poor patients’ survival. Using murine models of HER2+ breast cancer, AXL, but not Gas6, was found essential for metastasis. We determined that AXL is required for intravasation, extravasation and growth at the metastatic site. AXL is expressed in HER2+ cancers displaying EMT signatures and contributes to sustain EMT in murine tumors. Interfering with AXL in patient-derived xenograft impaired TGF-β-induced cell invasion. Lastly, pharmacological inhibition of AXL decreased the metastatic burden of mice developing HER2+ breast cancer. Our data identify AXL as a potential co-therapeutic target during the treatment of HER2+ breast cancers to limit metastasis.
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Project description:AXL is activated by its ligand GAS6 and is expressed in triple-negative breast cancer cells. We report that AXL is also detected in HER2+ breast cancer specimens where its expression correlates with poor patients’ survival. Using murine models of HER2+ breast cancer, AXL, but not Gas6, was found essential for metastasis. We determined that AXL is required for intravasation, extravasation and growth at the metastatic site. AXL is expressed in HER2+ cancers displaying EMT signatures and contributes to sustain EMT in murine tumors. Interfering with AXL in patient-derived xenograft impaired TGF-β-induced cell invasion. Lastly, pharmacological inhibition of AXL decreased the metastatic burden of mice developing HER2+ breast cancer. Our data identify AXL as a potential co-therapeutic target during the treatment of HER2+ breast cancers to limit metastasis.
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Project description:To better understand the signaling complexity of AXL, a member of the TAM family of receptor tyrosine kinases, we created a physical and functional map of AXL signaling interactions, phosphorylation events, and target-engagement of three AXL tyrosine kinase inhibitors (TKI). We assessed AXL protein-complexes using BioID, effects of AXL TKI on global phosphoproteins using mass spectrometry, and target engagement of AXL TKI using activity-based protein profiling. BioID identifies AXL-interacting proteins that are mostly involved in cell adhesion/migration. Global phosphoproteomics reveal that AXL inhibition deregulates phosphorylation of peptides involved in phosphatidylinositol-mediated signaling and cell adhesion/migration. Comparison of three AXL inhibitors reveals that TKI RXDX-106 inhibits pAXL, pAKT and migration/invasion of these cells without reducing their viability, while Bemcentinib exerts AXL-independent phenotypic effects. Proteomic characterization of these TKIs reveals that they inhibit diverse targets in addition to AXL, with Bemcentinib having the most off-targets. AXL and EGFR TKI co-treatment did not reverse resistance in cell line models of Erlotinib resistance. However, a unique vulnerability was identified in one persister clone, wherein combination of Bemcentinib and Erlotinib inhibited cell viability and signaling. We also show that AXL is overexpressed in ~30-40% of NSCLC but rarely in SCLC. NSCLC cells have a wide range of AXL protein expression, with basal activation detected rarely. Overall, we evaluate the mechanisms of action of AXL in lung cancer which can be used to establish assays to measure drug targetable active AXL complexes in patient tissues and inform the strategy for targeting its signaling network as an anticancer therapy.
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