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Clariom D expression in breast cancer samples

ABSTRACT: Clariom D expression in breast cancer samples

PROVIDER: PRJNA524163 | ENA |

REPOSITORIES: ENA

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Clariom D expression in breast cancer samples

Project description:We analysed expression using Clariom D array in 42 breast cancer FFPE samples

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Project description:Experiment description to give context to the data set: Ductal carcinoma in situ (DCIS), the most common type of pre-invasive lesion of breast, is being detected with increasing frequency with the advent of mammographic screening. Surgery is the mainstay for the treatment of DCIS. Based on the clinic-pathological features of DCIS, this may be followed by radiotherapy and/or endocrine therapy. The qualitative assessment of histological grade, expression of single protein biomarkers and more recently, mRNA analysis (DCIS Score) have been used to make these decisions. However, these factors do not fully predict the likelihood of development of invasive breast cancer treated with breast-conserving surgery. A majority of women with ductal carcinoma in situ (DCIS) receive breast-conserving surgery (BCS) but then face a risk of development of invasive breast cancer. Using Human Clariom D Pico Assay, we aim to compare the transcriptome profiles of DCIS in relation to development of invasive breast cancer (INV-BC) versus Non-INV-BC cases. Experimental Methods Clariom D Pico Human Transcriptome Array were performed according to Applied Biosystems/Thermo Fisher Scientific’s instructions. Experimental protocols are summarized in detail in Supplementary Methods (Supplementary Data). Sample annotation We compared the relative gene expression in development of invasive breast cancer (INV-BC) versus Non-INV-BC cases in Singapore cohort-59 cases (discovery cohort) and Italian cohort-50 cases (validation cohort). Microplate Plate and Well IDs are also provided as Clariom D ID list per cohort. Author information Dr. Sunil Badve is the Principal Investigator. Raw Data Probe Cell Intensity (CELL) and .ARR files which contain the design information for this study are provided (Human Clariom D Pico Assay).

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Expression and differential expression analysis of breast cancer patient samples and normal samples

Project description:Expression and differential expression analysis of breast cancer patient samples and normal samples from breast reduction operations. Fresh frozen tumor biopsies from early breast cancer cases were collected from 920 patients included in the Oslo Micrometastasis (MicMa) Study -- Oslo I from various hospitals between 1995 and 1998 (Naume et al. "Presence of bone marrow micrometastasis is associated with different recurrence risk within molecular subtypes of breast cancer." Mol Oncol 2007, 1: 160-171; Wiedswang et al. "Detection of isolated tumor cells in bone marrow is an independent prognostic factor in breast cancer." J Clin Oncol 2003, 21: 3469-3478.). Breast tissue samples from breast reduction operations were provided from the Colosseum Clinic, Oslo in co-operation with Akershus University Hospital, Lørenskog and are referred to as normal tissue. Expression and differential expression was assessed by using an Agilent custom microarray (244K, nONCOchip). The custom array contains probes for genomic regions that have been found to be differentially expressed (i) throughout cell cycle progression, (ii) in response to the anti-proliferative and pro-apoptotic p53 pathway, and (iii) the anti-apoptotic and pro-proliferative STAT-3 pathway by employing TAS (Kampa et al. "Novel RNAs identified from an in-depth analysis of the transcriptome of human chromosomes 21 and 22". Genome Research, 14:331-42, 2004). In addition, the Agilent custom array (244K) interrogates probes for genomic regions predicted to contain a conserved secondary structure identified by RNAz (Washietl et al. "Fast and reliable prediction of noncoding RNAs." Proc Natl Acad Sci USA. 102:2454-9, 2005.) or Evofold (Pedersen et al. "Identification and classification of conserved RNA secondary structures in the human genome." PLoS Comput Biol. 2:e33, 2006.), as well as known non-coding RNAs from public databases, and the Agilent mRNA probe set 014850.

2015-01-23 | GSE50428 | GEO

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