Targeted ErbB3 loss in mammary organoids harvested from ErbB3 DOX-KO mice +/- DOX treatment
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE32129 | GEO | 2012/01/04
SECONDARY ACCESSION(S): PRJNA147437
REPOSITORIES: GEO
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Project description:Mammary organoids harvested from ErbB3 DOX-KO mice, which utilize MMTV-Cre transgene expression in the LE to cause genomic recombination at floxed ErbB3 alleles in ErbB3FL/FL were cultured in the presence or absence of doxycycline to induce ErbB3 loss. The gene expression shift following DOX-induced ErbB3 loss in the 3D organoids was examined by microarray. Gene expression patterns were interrogated in mammary organoids from ErbB3 inducible-knockout mice cultured in the presence of absence of doxycycline. Three biological replicates of the experiment were performed, resulting in a total of 6 samples (3 treatment, 3 control).
2012-01-04 | E-GEOD-32129 | biostudies-arrayexpress
Project description:Targeted ErbB3 loss in mammary organoids harvested from ErbB3 DOX-KO mice +/- DOX treatment
| PRJNA147437 | ENA
Project description:Neuregulin (NRG) signaling through the receptor tyrosine kinase, ERBB3, is required for embryonic development, and dysregulated signaling has been associated with cancer progression. Here, we show that NRG1/ERBB3 signaling inhibits melanocyte (MC) maturation and promotes undifferentiated, migratory and proliferative cellular characteristics. Embryonic analyses demonstrated that initial MC specification and distribution were not dependent on ERBB3 signaling. However NRG1/ERBB3 signaling was both necessary and sufficient to inhibit differentiation of later stages of MC development in culture. Analysis of tissue arrays of human melanoma samples suggests that ERBB3 signaling may also contribute to metastatic progression of melanoma as ERBB3 was phosphorylated in primary tumors compared with nevi or metastatic lesions. Neuregulin 1-treated MCs demonstrated increased proliferation and invasion and altered morphology concomitant with decreased levels of differentiation genes, increased levels of proliferation genes and altered levels of melanoma progression and metastases genes. ERBB3 activation in primary melanomas suggests that NRG1/ERBB3 signaling may contribute to the progression of melanoma from benign nevi to malignancies. We propose that targeting ERBB3 activation and downstream genes identified in this study may provide novel therapeutic interventions for malignant melanoma.
2010-04-26 | GSE21463 | GEO
Project description:The four members of the epidermal growth factor receptor (EGFR/ERBB) family form homo- and heterodimers which mediate ligand-specific regulation of many key cellular processes in normal and cancer tissues. While signaling through the EGFR has been extensively studied on the molecular level, signal transduction through ERBB3/ERBB4 heterodimers is less well understood. Here, we generated isogenic mouse Ba/F3 cells that express full-length and functional membrane-integrated ERBB3 and ERBB4 or ERBB4 alone, to serve as a defined cellular model for biological and phosphoproteomics analysis of ERBB3/ERBB4 signaling. ERBB3 co-expression significantly enhanced Ba/F3 cell proliferation upon neuregulin-1 (NRG1) treatment. For comprehensive signaling studies we performed quantitative mass spectrometry (MS) experiments to compare the basal ERBB3/ERBB4 cell phosphoproteome to NRG1 treatment of ERBB3/ERBB4 and ERBB4 cells. We employed a workflow comprising differential isotope labeling with mTRAQ reagents followed by chromatographic peptide separation and final phosphopeptide enrichment prior to MS analysis. Overall, we identified 9686 phosphorylation sites which could be confidently localized to specific residues. Statistical analysis of three replicate experiments revealed 492 phosphorylation sites which were significantly changed in NRG1-treated ERBB3/ERBB4 cells. Bioinformatics data analysis recapitulated regulation of mitogen-activated protein kinase and Akt pathways, but also indicated signaling links to cytoskeletal functions and nuclear biology. Comparative assessment of NRG1-stimulated ERBB4 Ba/F3 cells indicated that ERBB3 did not trigger defined signaling pathways but more broadly enhanced phosphoproteome regulation in cells expressing both receptors. In conclusion, our data provide the first global picture of ERBB3/ERBB4 signaling and provide numerous potential starting points for further mechanistic studies
2016-01-15 | PXD002665 | Pride
Project description:Neuregulin (NRG) signaling through the receptor tyrosine kinase, ERBB3, is required for embryonic development, and dysregulated signaling has been associated with cancer progression. Here, we show that NRG1/ERBB3 signaling inhibits melanocyte (MC) maturation and promotes undifferentiated, migratory and proliferative cellular characteristics. Embryonic analyses demonstrated that initial MC specification and distribution were not dependent on ERBB3 signaling. However NRG1/ERBB3 signaling was both necessary and sufficient to inhibit differentiation of later stages of MC development in culture. Analysis of tissue arrays of human melanoma samples suggests that ERBB3 signaling may also contribute to metastatic progression of melanoma as ERBB3 was phosphorylated in primary tumors compared with nevi or metastatic lesions. Neuregulin 1-treated MCs demonstrated increased proliferation and invasion and altered morphology concomitant with decreased levels of differentiation genes, increased levels of proliferation genes and altered levels of melanoma progression and metastases genes. ERBB3 activation in primary melanomas suggests that NRG1/ERBB3 signaling may contribute to the progression of melanoma from benign nevi to malignancies. We propose that targeting ERBB3 activation and downstream genes identified in this study may provide novel therapeutic interventions for malignant melanoma. Gene expression changes are compared between Melan-Ink4a cells stimulated with NRG1-b1 (NRG1) for 21 days and NRG1 untreated Melan-INK4a cells in triplicate using Affymetrix Mouse GeneChip 1.0 ST chip .
2010-05-07 | E-GEOD-21463 | biostudies-arrayexpress
Project description:Mutations in PIK3CA, the gene encoding the p110α subunit of PI3K, induce transformation of mammary epithelial cells (MEC). Studies suggest the transforming action of mutant PIK3CA requires binding to activated receptor tyrosine kinases or adaptors. We examined in transgenic mice if ErbB3, a powerful activator of PI3K, is required for mutant PIK3CA-mediated MEC transformation. ErbB3 loss delayed PIK3CAH1047R-dependent mammary gland hyperplasia, but tumor latency, gene expression and markers of PI3K signaling were unaffected. In ErbB3-deficient tumors, mutant PI3K remained associated with other tyrosine phosphorylated adaptors, potentially explaining the dispensability of ErbB3 for tumorigenicity and PI3K activity. Combined inhibition of ErbB RTKs and PI3K with lapatinib and the p110α inhibitor BYL719, respectively, reduced PIK3CAH1047R-dependent tumor growth and PI3K signaling more potently than the p110α inhibitor alone. In human breast cancer cells harboring PIK3CAH1047R, the combination with BYL719 and an ErbB3 inhibitor synergistically inhibited tumor growth and P-Akt. These data suggest that basal tumor growth and PI3K signaling do not depend on ErbB RTKs in PIK3CAH1047R-expressing tumors. However, upon inhibition of p110α, these receptors limit the action of PI3K inhibitors potentially explaining the more potent effect of the combination against PI3K-mutant cancers. reference x sample
2013-06-20 | E-GEOD-43037 | biostudies-arrayexpress
Project description:Acinar cells are the principal secretory unit of multiple exocrine organs. A single cell layered, lumenized acinus forms from a large cohort of epithelial progenitors that must initiate and coordinate three cellular programs of acinar specification, namely, lineage progression, secretion, and polarization. Despite this well-known outcome, the mechanism(s) regulating these complex programs are unknown. Here, we demonstrate that neuronal-epithelial cross-talk drives acinar specification through neuregulin (NRG1)-ERBB3-mTORC2 signaling. Using single-cell and global RNA-sequencing of developing salivary glands, we identified NRG1-ERBB3 to precisely overlap with acinar specification during gland development. Genetic deletion of Erbb3 prevented cell lineage progression and the establishment of lumenized, secretory acini. Conversely, NRG1 treatment of isolated epithelia was sufficient to recapitulate the development of secretory acini. Mechanistically, we found NRG1-ERBB3 regulates each developmental program through an mTORC2 signaling pathway. Thus, we reveal a novel neuronal-epithelial (NRG1/ERBB3/mTORC2) mechanism to orchestrate the creation of functional acini.
2022-10-11 | GSE214976 | GEO
Project description:Mutations in PIK3CA, the gene encoding the p110α subunit of PI3K, induce transformation of mammary epithelial cells (MEC). Studies suggest the transforming action of mutant PIK3CA requires binding to activated receptor tyrosine kinases or adaptors. We examined in transgenic mice if ErbB3, a powerful activator of PI3K, is required for mutant PIK3CA-mediated MEC transformation. ErbB3 loss delayed PIK3CAH1047R-dependent mammary gland hyperplasia, but tumor latency, gene expression and markers of PI3K signaling were unaffected. In ErbB3-deficient tumors, mutant PI3K remained associated with other tyrosine phosphorylated adaptors, potentially explaining the dispensability of ErbB3 for tumorigenicity and PI3K activity. Combined inhibition of ErbB RTKs and PI3K with lapatinib and the p110α inhibitor BYL719, respectively, reduced PIK3CAH1047R-dependent tumor growth and PI3K signaling more potently than the p110α inhibitor alone. In human breast cancer cells harboring PIK3CAH1047R, the combination with BYL719 and an ErbB3 inhibitor synergistically inhibited tumor growth and P-Akt. These data suggest that basal tumor growth and PI3K signaling do not depend on ErbB RTKs in PIK3CAH1047R-expressing tumors. However, upon inhibition of p110α, these receptors limit the action of PI3K inhibitors potentially explaining the more potent effect of the combination against PI3K-mutant cancers.
2013-06-20 | GSE43037 | GEO
Project description:ERBB3 expression levels were down-regulated by shRNA. Two such stable lines were made and gene expression was measured by Affymetrix arrays.
2010-01-16 | GSE19921 | GEO
Project description:H3K27ac HiChIP analysis was performed in GI-MEN DOX-ASCL1 cells to analyze active chromatin-chromatin interactions in GI-MEN DOX-ASCL1 cells.
2023-11-21 | GSE214792 | GEO