Modeling Inducible Human Tissue Neoplasia Identifies an ECM Interaction Network Involved in Cancer Progression
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PROVIDER: PRJNA115827 | ENA |
REPOSITORIES: ENA
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Project description:To elucidate mechanisms of cancer progression, we generated inducible human neoplasia in 3-dimensionally intact epithelial tissue. Gene expression profiling of both epithelia and stroma at specific time points during tumor progression revealed sequential enrichment of genes mediating discrete biologic functions in each tissue compartment. A core cancer progression signature was distilled using the increased signaling specificity of downstream oncogene effectors and subjected to network modeling. Network topology predicted that tumor development depends upon specific ECM-interacting network hubs. Blockade of one such hub, the b1 integrin subunit, disrupted network gene expression and attenuated tumorigenesis in vivo. Thus, integrating network modeling and temporal gene expression analysis of inducible human neoplasia provides an approach to prioritize and characterize genes functioning in cancer progression.
2009-06-02 | GSE15299 | GEO
Project description:To elucidate mechanisms of cancer progression, we generated inducible human neoplasia in 3-dimensionally intact epithelial tissue. Gene expression profiling of both epithelia and stroma at specific time points during tumor progression revealed sequential enrichment of genes mediating discrete biologic functions in each tissue compartment. A core cancer progression signature was distilled using the increased signaling specificity of downstream oncogene effectors and subjected to network modeling. Network topology predicted that tumor development depends upon specific ECM-interacting network hubs. Blockade of one such hub, the b1 integrin subunit, disrupted network gene expression and attenuated tumorigenesis in vivo. Thus, integrating network modeling and temporal gene expression analysis of inducible human neoplasia provides an approach to prioritize and characterize genes functioning in cancer progression. There are 3 experiments in this study: (1a) a time course of human epidermal tissue transformed by oncogenic ER:H-Ras and IkBaM comprising days 0, 5, 20, and 35 post Ras activation using 4OHT; (1b) a matched time course of adjacent mouse stromal tissue during tumor progression; (2) Arrays comparing 4OHT-induced, Raf-1:ER/IkBaM transformed epidermal tissue and -4OHT controls; and (3) Arrays comparing Ras:ER/IkBaM grafts co-treated with 4OHT and either IgG control antibody or an anti-b1 integrin blocking antibody, P5D2 for 30 days. All arrays were done in biologic duplicate. Epidermal tissue co-expressing ER:H-RasG12V (ER:Ras) and IkBaM was regenerated on female scid/scid mouse recipients. Grafts were allowed to heal for at least 3 weeks before Ras activation via daily i.p. injections of 730ug of 4OHT (in 110ul of a corn oil/ethanol mixture). Duplicate grafts were harvested after 0, 5, 20, and 35 days of 4OHT treatment. Laser capture microdissection was utilized to independently isolate epithelial cells of the basal most layers and adajacent stromal tissue for each time point. RNA was subjected to one round of T7-based linear amplification (Ambion Message Amp II enhanced kit) and hybridized to either HG-U133A 2.0 or MG-430A affymetrix oligonucleotide arrays. Arrays from this experiment are labeled Ras and Stroma, respectively. The second experment was performed on Raf-1:ER/IkBaM expressing grafts with and without 4OHT treament for 30 days. The third experiment was done comparing ER:Ras/IkBaM grafts concomitantly treated with 4OHT and 1.5mg/week of either IgG control antibody or a mouse monoclonal blocking antibody against b1 integrin for 30 days. For experiments 2 and 3, HG-U133A 2.0 GeneChips were used; 4OHT treatment and RNA isolation/amplification was performed as above.
2009-06-02 | E-GEOD-15299 | biostudies-arrayexpress
Project description: Not available
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Project description:Basal-like carcinoma is a subtype of breast cancer that is characterized by poor prognosis and high intratumor heterogeneity. Using a basal-like breast epithelial line, we have identified two anti-correlated gene-expression programs that arise among single extracellular matrix (ECM)-attached cells during organotypic 3D culture. The first program contains TGFBR3, a high-affinity receptor for transforming growth factor β (TGFβ) and other related ligands. The second program contains the JUND transcription factor together with the basal-like marker, KRT5. By disrupting the TGFBR3 and JUND programs individually, we reveal an important circuit for 3D morphogenesis that is wired together by four negative-feedback loops. Computational modeling of this circuit showed that it could exhibit damped, antiphase oscillations when excited with small impulses of TGFβ-like ligand. We directly visualize the circuit's spontaneous dynamics in organotypic cultures by using live-cell imaging with engineered pathway reporters. Importantly, we show that the essence of the JUND-TGFBR3 expression circuit holds true in early basal-like tumors that heterogeneously express KRT5. Correlated JUND-KRT5 expression depends critically on contact with stromal ECM and local expression of tenascin C. This work illustrates how complex tumor heterogeneities can be deconstructed into intrinsic single-cell expression circuits that are modulated by the microenvironment. Gene expression analysis of outer ECM-attached vs. inner cells of MCF10A-5E clones grown in organotypic 3D culture at day 6. Total RNA was isolated from ~50 outer ECM-attached cells and ~50 inner cells, each separately microdissected from 8 micron sections of MCF10A structures at day 6 of morphogenesis. Total RNA was amplified in quadruplicate, and hybridized to HumanRef-8 v2.0 Expression BeadChips (Illumina).
2015-06-05 | E-GEOD-41527 | biostudies-arrayexpress
Project description:Type I, II, III and V collagens were commonly identified in human, pig, and mouse breast ECM. Mammary epithelial cells were able to form acini on certain types or combinations of the four collagens at normal breast tissue stiffness levels. Comparison of the collagen species in mouse normal breast and breast tumor ECM revealed common and distinct sets of collagens within the two types of tissues. Elevated collagen type I alpha 1 chain expression was found in human breast cancers. Collagen type XXV alpha 1 chain was identified in mouse breast tumors but not in normal breast tissues. Our data provide insights into modeling human breast pathophysiological structures and functions using native tissue-derived hydrogels and potential contributions of different collagen types or their monomers in breast cancer development.
2023-03-11 | PXD037920 | Pride
Project description:Gene expression data from the RNA sequencing of laser microdissected pancreatic intraepithelial neoplasia and pancreatic normal ducts.
2018-03-17 | GSE96784 | GEO
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Project description:A critical step in metastasis is cancer cell dissemination. Dissemination and metastasis are associated with specific genetic changes and changes in extracellular matrix (ECM), but how these changes interact to enable dissemination remains unclear. Here we tested the importance of ECM to dissemination in both normal and malignant mammary epithelium. By time-lapse imaging, we observed collective invasion and dissemination directly in 3D culture. Our results reveal that the pattern of epithelial migration and local dissemination are constrained by the local ECM microenvironment. To identify RNA expression changes that could regulate these changes in cell behavior, we conducted whole genome RNA expression profiling from normal and malignant mammary epithelium in 3D culture. We collected RNA from normal and malignant epithelium during active growth at 4 days in culture in either Matrigel or collagen I. We hybridized the resulting RNA to Agilent single color microarrays with a minimum of three biologically independent microarray replicates per condition. We observed significant gene expression differences between normal and malignant epithelium, even when cultured in the same ECM. In contrast, the ECM microenvironment had a relatively small impact on RNA expression, despite its large effects on migratory strategy and local dissemination. Gene expression was measured in normal and malignant mammary epithelial fragments cultured in one of two 3D matrices (laminin-rich basement membrane gel or collagen I) and collected at day 4, which we observed to have peak invasion and dissemination. At least three independent experiments were performed at each time using different mice for each experiment.
2012-08-16 | E-GEOD-39173 | biostudies-arrayexpress