Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA179511 | ENA |
REPOSITORIES: ENA
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Project description:To delineate gene expression levels in whole non-metastatic and metastatic transplantable primary mouse mammary tumour allografts Abstract to be provided from publication Primary mouse mammary tumours were grown till 400-600mm3 in size. Five different tumour models were analysed in triplicate. Thus, 3 different tumours/mice were used per model for a total of 15 mice. Each sample was applied to a separate microarray. Total RNA was prepared from whole primary tumours using Trizol reagent. Each sample was applied to Affymetrix gene expression arrays Mouse Gene 1.0ST.
2013-01-01 | E-GEOD-42272 | biostudies-arrayexpress
Project description:To delineate gene expression levels in whole non-metastatic and metastatic transplantable primary mouse mammary tumour allografts Abstract to be provided from publication
2013-01-01 | GSE42272 | GEO
Project description:Genomic Profiling of mouse mammary tumor models identifies miRNA signatures associated with mammary tumor lineage (primary tumors and normal mammary glands)
| PRJNA130467 | ENA
Project description:ErbB-2 overexpression and amplification occurs in 15 - 30% of human invasive breast carcinomas associated with poor clinical prognosis. Previously, we have demonstrated that four ErbB-2/Neu tyrosine-autophosphorylation sites within the cytoplasmic tail of the receptor recruit distinct adaptor proteins and are sufficient to mediate transforming signals in vitro. Two of these sites representing the Grb2 (Neu-YB) and Shc (Neu-YD) binding sites can induce mammary tumourigenesis and metastasis. Here we show that Neu-YC and Neu-YE transgenic mice develop metastatic mammary tumours. A detailed comparison of pathological and transcriptional profiles among all Neu mutant mouse models revealed that Neu-YC, -YD and -YE mammary tumours shared similar pathological and transcriptional features correlating with their capacity to signal through a common adaptor like Shc. In contrast, the Neu-YB mouse model displayed a unique pathology with a high metastatic potential that correlates with a distinct transcriptional profile. We identified genes specifically expressed in YB-induced mammary tumours, including CXCL12/SDF-1α that promotes malignant tumour progression. Furthermore, Neu-YB tumour epithelial cells showed abundant intracellular CXCL12/SDF-1α protein, which may reflect the more aggressive phenotype among all Neu mutant mouse models. These findings indicate that activation of distinct Neu-coupled signalling pathways has a deep impact on the biological behaviour of Neu-induced tumours. Experiment Overall Design: Total RNA was isolated from 10 individual flash frozen mammary tumour samples derived from our MMTV/neundl-NYPD, -YB, -YC, -YD, -YE and the parental MMTV/neu NDL2-5 strains. Two RNA pools, containing equal amount of total RNA from five individual tumours, were generated from each strain and functioned as a biological repeat. Five hundred nanograms of total RNA from each pool was subjected to one round of T7 linear amplification using the Amino Allyl MessageAmpTM aRNA Kit (Ambion, Austin, Texas). Ten micrograms of the resulting aRNA was labelled with Cy3 and Cy5 dyes. Each of the 12 Samples represents a dyeswap pair.
2008-06-15 | E-GEOD-7595 | biostudies-arrayexpress
Project description:Genomic Profiling of mouse mammary tumor models identifies miRNA signatures associated with mammary tumor lineage (mammary normal and tumors in different mice strains)
| PRJNA130465 | ENA
Project description:Translational breast cancer research is hampered by difficulties in obtaining and studying primary human breast tissue, and by the lack of in vivo preclinical models that reflect patient tumor biology accurately. In an effort to overcome these limitations, we propagated a cohort of human breast tumors grown in the mammary fat pad of SCID/Beige and NOD/SCID/IL2?-receptor null (NSG) two relatively new immunocompromised mouse models, under a series of transplant conditions. Both models yielded stably transplantable xenografts relatively high rates compared with previously available immunocompromised mice. Xenograft lines were established directly from breast cancer patient samples, without intervening culture in vitro, using the epithelium-free mammary fat pad as the transplantation site. Of the conditions tested, xenograft take rate was highest in the presence of a low-dose estradiol pellet. Overall, 35 stably transplantable xenograft lines representing 27 patients were established, using pre-treatment, mid-treatment, and/or post-treatment samples. Most patients yielding xenografts were “triple-negative” (ER-PR-HER2-) (n=21). However, we were able to establish lines from three ER-PR-HER2+ patients, one ER+PR-HER2-, one ER+PR+HER2- and one “triple-positive” (ER+PR+HER2+) patient. Serially passaged xenografts show biological consistency with the tumor of origin at the histopathology level, and remarkable stability across multiple transplant generations at the genomic, transcriptomic, and proteomic levels. Of the 27 patients represented, xenografts derived from 13 patients showed metastasis to the mouse lung. These models thus serve as a renewable, quality-controlled tissue resource, and should prove useful for preclinical evaluation of experimental therapeutics. reference x sample
2013-06-25 | E-GEOD-34412 | biostudies-arrayexpress
Project description:ErbB-2 overexpression and amplification occurs in 15 - 30% of human invasive breast carcinomas associated with poor clinical prognosis. Previously, we have demonstrated that four ErbB-2/Neu tyrosine-autophosphorylation sites within the cytoplasmic tail of the receptor recruit distinct adaptor proteins and are sufficient to mediate transforming signals in vitro. Two of these sites representing the Grb2 (Neu-YB) and Shc (Neu-YD) binding sites can induce mammary tumourigenesis and metastasis. Here we show that Neu-YC and Neu-YE transgenic mice develop metastatic mammary tumours. A detailed comparison of pathological and transcriptional profiles among all Neu mutant mouse models revealed that Neu-YC, -YD and -YE mammary tumours shared similar pathological and transcriptional features correlating with their capacity to signal through a common adaptor like Shc. In contrast, the Neu-YB mouse model displayed a unique pathology with a high metastatic potential that correlates with a distinct transcriptional profile. We identified genes specifically expressed in YB-induced mammary tumours, including CXCL12/SDF-1α that promotes malignant tumour progression. Furthermore, Neu-YB tumour epithelial cells showed abundant intracellular CXCL12/SDF-1α protein, which may reflect the more aggressive phenotype among all Neu mutant mouse models. These findings indicate that activation of distinct Neu-coupled signalling pathways has a deep impact on the biological behaviour of Neu-induced tumours. Keywords: genetic modification, Neu mutant mouse models, mammary tumor
2007-08-15 | GSE7595 | GEO
Project description:Profiling of mouse mammary tumours that have developed in a mouse model expressing mutant Pik3ca^H1047R at endogenous level under control of the MMTV promoter (Tikoo et al., PLoS one 2012). Copy number variations in tumours (compared to matching liver DNA) were detected using Agilent Sureprint microarrays.
2016-06-04 | GSE47635 | GEO
Project description:We performed affymetrix gene expression profiling on mammary tumors from eight well-characterized genetically engineered Mouse (GEM) models of human breast cancer. The gene expression data will be combined with the miRNA gene expression data from the corresponding mammary tumors and tissues for integrated miRNA and mRNA gene expression analysis, which are useful in improving the identification of miRNA targets from potential targets identified in silico. mRNA expression data for 41 mouse primary mammary tumors and 5 mouse normal mammary glands
2011-07-20 | E-GEOD-23938 | biostudies-arrayexpress