Myc activation in breast cancer is due to p53-loss and sustains self-renewal of cancer stem cells (RNA-Seq)
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE87003 | GEO | 2019/01/21
REPOSITORIES: GEO
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Project description:Purpose: discover the downstream pathways and the mechanism of target activation by the p53:Myc axis in normal mammary and cancer stem cells Methods: we performed ChIPseq experiments from NMuMG cells grown in adhesion under standard conditions Results: the p53:Myc axis orchestrates its transcriptional response in mammary-epithelial cells via a dual and overlapping mechanism: i) a tightly controlled epistasis driven by p53 and executed by Myc, and ii) a co-operative double occupancy of their downstream effectors at different regulatory regions
2019-01-21 | GSE87002 | GEO
Project description:Undifferentiated mammosphere RNA. Samples contain RNA extracted from the cells of mouse mammospheres. Mammosphere are believed to be comprised of stem/progenitor cells (GSM88038). Differentiated mammosphere RNA. RNA extracted from the cells of mouse mammospheres induced to differentiate over a 6-day period. Mammosphere are believed to be comprised of stem/progenitor cells (GSM88039). Keywords: mammosphere differentiation
2005-12-20 | GSE3841 | GEO
Project description:In the past few years, mammary cancer initiating cells (CICs) have been identified in mouse and human as a subpopulation of tumor cells that selectively posses tumor initiation and self-renewal capacity and the ability to give rise to bulk populations of non-tumorigenic cancer cells progeny through differentiation. They could also be responsible for tumor progression, metastasis, resistance to therapy and recurrence. Thus, the understanding of the pathways regulating CIC self-renewal, differentiation and tumorigenicity represents an important task in the development of effective anticancer therapies. To detect the set of genes associated to CIC in our mouse breast cancer model we analysed three prototypic situations: TUBO cells grown in DMEM under adherent conditions (called TDA in GSE26517 and epithelial bulk in GSE21451), TUBO cells grown in mammosphere medium under adherent conditions (called TMA in GSE26517), TUBO cells grown in mammosphere medium under low-attachment conditions (called mammospheres p1 in GSE21451), i.e. the conditions used to support the formation of mammospheres. This analysis led to the identification of growth factors and immune system-related genes, including toll-like receptor 2 (TLR2). The inhibition of TLR2 signaling pathway strongly impaired mammosphere generation, demonstrating the involvement of TLR2 in CSC self-renewal. We profiled on MouseWG?6 v2.0 Illumina beadchips two independent experiments: ADHERENT (GSE26517) made by the comparison between TDA and TMA and SOSPENSION (part of GSE21451) made by the comparison between epithelial bulk and mammospheres p1. Mammosphere medium contains epidermal growth factor (EGF), insulin and basic fibroblast growth factor (bFGF) that may influence transcript expression in a way not necessarily related to the assembly of mammospheres. Therefore, following normalization and removal of those transcripts not expressed and not changing, we used the Integrative Correlation coefficient (IC, Parmigiani et al. Clin Cancer Res 2004, 10:2922–2927) as filter to remove genes only associate to growth factors present in the mammosphere medium under adherent growth conditions, i.e IC > 0.1. Differential gene expression was then assessed by regularized t?test (Smyth GK. Stat Appl Genet Mol Biol 2004, 3:Article3) comparing mammospheres p1 with respect to epithelial bulk, using an uncorrected p-value ? 0.05, together with an absolute log2 fold change threshold ?1.
2013-11-30 | E-GEOD-26527 | biostudies-arrayexpress
Project description:Tumorpsheres and mammospheres were used to propagate mouse breast tumor-initiating cells and their normal stem/progenitor counterparts, respectively. Mammospheres induced to differentiate were used to model the more differentiated cells of the mouse mammary gland. We used microarrays to find differentrially expressed genes between tumorspheres, mammospheres, and mammospheres induced to differentiate
2012-01-30 | GSE32463 | GEO
Project description:Tumorpsheres and mammospheres were used to propagate mouse breast tumor-initiating cells and their normal stem/progenitor counterparts, respectively. Mammospheres induced to differentiate were used to model the more differentiated cells of the mouse mammary gland. We used microarrays to find differentrially expressed genes between tumorspheres, mammospheres, and mammospheres induced to differentiate Primary cells were isolate from either mouse mammary glands (FVB/N) or mouse mammary tumors and placed in stem cell media (MMTV-Neu [N2O2]. Spheres were passaged every 7 days for 3-5 passages and harvested for RNA isolation
2012-01-30 | E-GEOD-32463 | biostudies-arrayexpress
Project description:Mammary gland aging is due to aberrant activation of p66Shc, which induces p53/p44 signaling, leading to failure of symmetric divisions, decreased proliferation and reduced regenerative potential of MaSCs. Age-related changes in mammary epithelial cells derived from C57BL/6J WT and p66Shc knockedout mice cultured as stem cell-enriched mammospheres.
2022-12-21 | GSE201253 | GEO
Project description:In the past few years, mammary cancer initiating cells (CICs) have been identified in mouse and human as a subpopulation of tumor cells that selectively posses tumor initiation and self-renewal capacity and the ability to give rise to bulk populations of non-tumorigenic cancer cells progeny through differentiation. They could also be responsible for tumor progression, metastasis, resistance to therapy and recurrence. Thus, the understanding of the pathways regulating CIC self-renewal, differentiation and tumorigenicity represents an important task in the development of effective anticancer therapies. To detect the set of genes associated to CIC in our mouse breast cancer model we analysed three prototypic situations: TUBO cells grown in DMEM under adherent conditions (called TDA in GSE26517 and epithelial bulk in GSE21451), TUBO cells grown in mammosphere medium under adherent conditions (called TMA in GSE26517), TUBO cells grown in mammosphere medium under low-attachment conditions (called mammospheres p1 in GSE21451), i.e. the conditions used to support the formation of mammospheres. This analysis led to the identification of growth factors and immune system-related genes, including toll-like receptor 2 (TLR2). The inhibition of TLR2 signaling pathway strongly impaired mammosphere generation, demonstrating the involvement of TLR2 in CSC self-renewal.
2013-11-30 | GSE26527 | GEO
Project description:In order to metastasize, few cells need to detach from the primary tumor, and transition through the circulation to distant sites to establish new solid tumor metastases. The gene expression changes occurring between these transitions are poorly understood, and controversial findings have been reported regarding transitions between epithelial (E) and mesenchymal (M) cell states. To model the metastasis process in vitro, here we examined the dynamics of gene expression changes and respective cell fates that are occurring in cells that are transitioning from adhesion culture to suspension 3D culture (mammospheres) and back to adhesion culture in vitro. We found that mammosphere and replating cultures of epithelial (E) cell lines (HP cells and E clones) led to enrichment for mesenchymal (M) signatures characteristic of the mesenchymal cell lines, indicative of an epithelial to mesenchymal transition (EMT), but retainment of E-specific signatures (Grosse-Wilde et al., 2015). This co-expression of E and M signatures was stably maintained between the mammosphere state in suspension and in replated cells, indicating a stable E/M gene expression state by partial EMT in E cell lines, which has been associated with a stem-like state (Grosse-Wilde et al., 2015; Jolly et al., 2014; Lu et al., 2014; Zhang et al., 2014). Interestingly, mammosphere suspension culture of mesenchymal M clones also resulted in co-expression of E and M signatures generated by partial mesenchymal to epithelial transition (MET). However, in stark contrast to E clones and HP cells, immediately upon replating M cell-derived mammospheres to adhesion lost the intermediate E/M state and converted back to stable expression of M signatures indicative of rapid EMT. This suggests that the intermediate state in M cells is very unstable. Together, these replating data suggest that prolonged detachment of epithelial-derived cells leads to loss of expression of E signatures and EMT. Life-threatening macrometastases typically recapitulate the gene expression of the primary tumor, which requires expression of E signatures, while the mesenchymal micrometastases are frequent but not-proliferative and harmless. Since all HMLER cell lines independent of their initial E or M state converged to an M state upon expansion in suspension, our data suggest that induction of EMT in suspended HMLER cells may be one reason for the observed benign non-metastatic character of HMLER cells when used in mouse xenograft experiments, and for their metastatic inefficiency. Our datasets of the replating kinetic may be useful to identify which pathways are involved in the processes enabling the mixed HP population to maintain a stable E/M expression signature and a more stem-like state, which we have identified as caused by cell-cell cooperation between phenotypically different E and M cell-types. By contrast, M cells can only transiently assume this E/M gene expression state, and not generate a stable phenotypic heterogeneity and therefore absence of cooperation between E and M cell-types. Instability of the intermediate stem-like E/M state in M cell-types and rapid conversion to the M state can explain why 1) pure M populations are often phenotypically stable and are not undergoing MET in vitro (Schmidt et al., 2015; Zhang et al., 2014), 2) why pure M populations are less aggressive resulting in less metastases than mixed cooperating E and M cell populations (Ocaña et al., 2012; Tsuji et al., 2008) or 3) why complete EMT results in more benign less metastasizing tumors than incomplete EMT (Tran et al., 2014; Tsai et al., 2012) and finally 4) why expression of M traits in primary tumors are associated with good patient outcomes and less metastases than E signatures (Kim et al., 2011; Mylona et al., 2008; Tan et al., 2014). Dontu, G., Abdallah, W.M., Foley, J.M., Jackson, K.W., Clarke, M.F., Kawamura, M.J., and Wicha, M.S. (2003). In vitro propagation and transcriptional profiling of human mammary stem/progenitor cells. Genes Dev. 17, 1253–1270. Elenbaas, B., Spirio, L., Koerner, F., Fleming, M.D., Zimonjic, D.B., Donaher, J.L., Popescu, N.C., Hahn, W.C., and Weinberg, R.A. (2001). Human breast cancer cells generated by oncogenic transformation of primary mammary epithelial cells. Genes Dev 15, 50–65. Grosse-Wilde, A., Fouquier d’Hérouël, A., McIntosh, E., Ertaylan, G., Skupin, A., Kuestner, R.E., del Sol, A., Walters, K.-A., and Huang, S. (2015). Stemness of the hybrid Epithelial/Mesenchymal State in Breast Cancer and Its Association with Poor Survival. PLOS ONE 10, e0126522. Jolly, M.K., Huang, B., Lu, M., Mani, S.A., Levine, H., and Ben-Jacob, E. (2014). Towards elucidating the connection between epithelial-mesenchymal transitions and stemness. J. R. Soc. Interface R. Soc. 11, 20140962. Kim, H.J., Kim, M.-J., Ahn, S.H., Son, B.H., Kim, S.B., Ahn, J.H., Noh, W.C., and Gong, G. (2011). Different prognostic significance of CD24 and CD44 expression in breast cancer according to hormone receptor status. The Breast 20, 78–85. Lu, M., Jolly, M.K., Onuchic, J., and Ben-Jacob, E. (2014). Toward decoding the principles of cancer metastasis circuits. Cancer Res. 74, 4574–4587. Mylona, E., Giannopoulou, I., Fasomytakis, E., Nomikos, A., Magkou, C., Bakarakos, P., and Nakopoulou, L. (2008). The clinicopathologic and prognostic significance of CD44+/CD24−/low and CD44−/CD24+ tumor cells in invasive breast carcinomas. Hum. Pathol. 39, 1096–1102. Ocaña, O.H., Córcoles, R., Fabra, Á., Moreno-Bueno, G., Acloque, H., Vega, S., Barrallo-Gimeno, A., Cano, A., and Nieto, M.A. (2012). Metastatic Colonization Requires the Repression of the Epithelial-Mesenchymal Transition Inducer Prrx1. Cancer Cell 22, 709–724. Schmidt, J.M., Panzilius, E., Bartsch, H.S., Irmler, M., Beckers, J., Kari, V., Linnemann, J.R., Dragoi, D., Hirschi, B., Kloos, U.J., et al. (2015). Stem-Cell-like Properties and Epithelial Plasticity Arise as Stable Traits after Transient Twist1 Activation. Cell Rep. 10, 131–139. Tan, T.Z., Miow, Q.H., Miki, Y., Noda, T., Mori, S., Huang, R.Y.-J., and Thiery, J.P. (2014). Epithelial-mesenchymal transition spectrum quantification and its efficacy in deciphering survival and drug responses of cancer patients. EMBO Mol. Med. 6, 1279–1293. Tran, H.D., Luitel, K., Kim, M., Zhang, K., Longmore, G.D., and Tran, D.D. (2014). Transient SNAIL1 Expression Is Necessary for Metastatic Competence in Breast Cancer. Cancer Res. 74, 6330–6340. Tsai, J.H., Donaher, J.L., Murphy, D.A., Chau, S., and Yang, J. (2012). Spatiotemporal Regulation of Epithelial-Mesenchymal Transition Is Essential for Squamous Cell Carcinoma Metastasis. Cancer Cell 22, 725–736. Tsuji, T., Ibaragi, S., Shima, K., Hu, M.G., Katsurano, M., Sasaki, A., and Hu, G. -f. (2008). Epithelial-Mesenchymal Transition Induced by Growth Suppressor p12CDK2-AP1 Promotes Tumor Cell Local Invasion but Suppresses Distant Colony Growth. Cancer Res. 68, 10377–10386. Zhang, J., Tian, X.-J., Zhang, H., Teng, Y., Li, R., Bai, F., Elankumaran, S., and Xing, J. (2014). TGF- -induced epithelial-to-mesenchymal transition proceeds through stepwise activation of multiple feedback loops. Sci. Signal. 7, ra91–ra91. For these analyses we used the heterogeneous parental HMLER (HP) cell line, with isogenic epithelial (E) and mesenchymal (M) cell-types (Elenbaas et al., 2001), and stable clonal HMLER-derived E and M cell lines, which are normally passaged under adhesion conditions (_adh, GSE66527). We cultured cell lines under 3D suspension conditions resembling mammosphere growth conditions that are typically used to enrich for stem-like cells (Dontu et al., 2003), and examined gene expression of cells under mammosphere conditions (_sus, GSE66527), or after replating (_re) in a kinetic examining gene expression from 6, 24, 96, and 240 hrs after cells were allowed to readhere to normal dishes for the heterogeneous but mostly epithelial (HP) cell lines and mesenchymal (M4) cell lines. To validate our findings we also examined gene expression of cells replated after mammosphere culture for about two weeks from three different E (E3, E4, E5) and M clones (M3, M4, M1). All gene expression samples were taken from biological replicates (at least duplicates) of cells grown in different wells or even at different times. Gene expression of replated (_re) cells was compared to the respective cell lines grown under adhesion conditions (_adh), as well as to the respective cell line grown under suspension mammosphere condition (_sus) which have been deposited previously under accession number GSE66527. HP replicates (re): HP_re_AGW120913, HP_re_RK12026, HP_re_AGW1209_5, HP_re_AGW1209_6, HP_re_AGW1209_7, HP_re_AGW1209_8, HP_re_AGW1209_9, HP_re_0607_1, HP_re_0607_2 E3 replicates (re): E3_re_RK1202, E3_re_RK12028; E4 replicates: E4_re_0622, E4_re_0613; E5 replicates: E5_re_0613_1, E5_re_0613_2 M1 replicates (re): M1_re_0607_1, M1_re_0607_2, M2 replicates: M2_re_RK1202, M2_re_RK12029, M2_re_AGW1209_3, M2_re_AGW1209_4, M2_re_AGW1209_5, M3 replicates: M4_re_0607_1, M4_re_0607_2 HP replicates (adh): HP_adh_0629, HP_adh_2210, HP_adh_0607sc, HP_adh_0607c E3 replicates (adh): E3_adh_0629, E3_adh, E3_adh_0826. E4 replicates (adh): E4_adh_0607, E4_adh_0210, E5 replicates (adh): E5_adh_0210, E5_adh_0607 M1 replicates (adh): M1_adh_0210, M1_adh_0607, M4 replicates (adh): M4_adh_0607, M4_adh_0210, M3 replicates (adh): M3_adh, M3_adh_2210, M3_adh_2810 HP replating kinetic (adh): HP_adh_0607c (GSE66527), HP_adh_0607sc (GSE66527), HP (mammospheres, suspension): HP_sus_0603_2 (GSE66527), HP_sus_0603_1 (GSE66527), HP (replated 6 hrs): HP_re_6_0603_1, HP_re_6_0603_2, HP (replated 24hrs): HP_re_24_0607_1, HP_re_24_0607_2, HP (replated 96 hrs): HP_re_96_0607_1, HP_re_96_0607_2, HP (replated 240hrs): HP_re_0607_1, HP_re_0607_2, M4 replating kinetic (adh): M4_adh_0210 (GSE66527), M4_adh_0607 (GSE66527), M4 (mammospheres, suspension): M4_sus_0603_2 (GSE66527), M4_sus_0603_1 (GSE66527), M4 (replated 24 hrs): M4_re_24_0603_1, M4_re_24_0603_2, M4 (replated 96 hrs), M4_re_96_0607_1, M4_re_96_0607_2, M4 replated 240hrs): M4_re_0607_1, M4_re_0607_2
2015-07-10 | E-GEOD-70279 | biostudies-arrayexpress
Project description:p53 is a known tumor suppressor. We have found that stromal p53 regulates breast cancer development, the immune landscape, and survival in an oncogene specific manner when comparing the epithelial oncogenes ErbB2 and KrasG12D In this dataset, we have evaluated mammary epithelia from mice with and without epithelial KrasG12D and with and without stromal p53 deletion. We have also evaluated mammary fibroblasts from mice with and without epithelial KrasG12D and with and without stromal p53 deletion.
2022-05-01 | GSE201935 | GEO
Project description:The efficacy of cancer treatments have improved constantly in the last decade. However, therapeutic resistance and the lack of curative treatments in metastatic disease, raises the question if conventional anticancer therapies target the right cells. Indeed, these treatments might miss cancer stem cells (CSCs), which might also represent a more chemoresistant and radioresistant subpopulation within cancer. In this view using vaccines in tertiary prevention of cancer, i.e. residual disease treatment, might be particularly effective if vaccine-elicited immune response is directed against CSC oncoantigens (OAs) M-bM-^@M-^T proteins required for the neoplastic process M-bM-^@M-^T the chance that the tumour will evade the vaccine should be reduced. An important task to devise effective CSC preventive vaccines is therefore the identification of CSC OAs. In this experiment we used a cell line (TuBo) derived by the mouse breast cancer model BALB-neuT and its CSC subpupolation, enriched by mean of mammosphere formation. Integrating data derived by gene and exon-level transcription profiling of the above experiments with public available normal and tumor datasets we identified two new breast cancer CSC OAs: TMPRSS4 and xCT. Both genes are linked to invasion, migration and metastasis. Furthermore, we observed that alternative splicing events discriminating TuBo cells, grown in adherent medium, with respect of TuBo mammospheres, produced growing in no-adherent medium, are very limited. We detect only one clear splcing event characterizing the beta-isoform of Rabgap1l gene. This SuperSeries is composed of the SubSeries listed below. The adherent TuBo epithelial cells were generated from a mammary carcinoma arising in a BALB/c mouse female transgenic for the activated rat ErbB2 oncogene (BALB-neuT) and were cultured in DMEM supplemented with 20% FCS. Single TuBo cells were plated in ultra low attachment flasks in serum-free DMEM-F12 medium supplemented with bFGF, EGF and insulin. Nonadherent spherical clusters of cells, named mammospheres, were collected by gentle centrifugation after 7 days and dissociated enzymatically and mechanically, using trypsin and pipetting, respectively.
2013-11-30 | E-GEOD-21486 | biostudies-arrayexpress