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- W2316993602 abstract "The study of gene expression in conventionally processed tissues is hampered by degradation of mRNA. Expensive, low multiplex, quantitative PCR methods can be unreliable due to the limited template sizes. One way to overcome this problem is to use array-based methods. DASL ® technology relies on random priming for production of cDNA, in concert with universal bead-arrays to allow the detection and relative quantitation of expression of specific gene subsets. Using the Illumina DASL ® Cancer Panel (500 cancer-associated genes on one array), we evaluated the expression of key genes in archival FFPE tissue samples from 80 breast cancer patients with well characterised pathological and clinical features. We first assessed transcript integrity in the samples on the basis of levels of mRNA encoding RPL13A, prior to running the Cancer Panel. A subset of genes of interest was then assessed by qPCR to confirm the relative levels observed using the DASL ® assay. Finally the expression of the same subset of genes was evaluated at the protein level by immunohistochemistry. We were able to predict, with good accuracy based upon RPL13A assays, those samples unsuitable for DASL ® analysis. Furthermore, the results of DASL ® analysis showed good correlation with protein levels, as measured by immunohistochemistry, for a number of key genes including ERBB2 (HER2) and ESR1 (ER). We conclude that DASL ® represents a powerful tool for assessing expression of multiple genes in archival tissue. Note: This abstract was not presented at the AACR 101st Annual Meeting 2010 because the presenter was unable to attend. Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 101st Annual Meeting of the American Association for Cancer Research; 2010 Apr 17-21; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2010;70(8 Suppl):Abstract nr 2953." @default.
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- W2316993602 date "2010-04-15" @default.
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- W2316993602 title "Abstract 2953: Evaluating gene expression in FFPE breast cancer tissues using DASL®" @default.
- W2316993602 doi "https://doi.org/10.1158/1538-7445.am10-2953" @default.
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