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Identification of differentially expressed sense and antisense transcript pairs in breast epithelial tissues

Grigoriadis, Anita, Oliver, Gavin, Tanney, Austin, Kendrick, Howard, Smalley, Matthew John, Jat, Parmjit and Neville, A. Munro 2009. Identification of differentially expressed sense and antisense transcript pairs in breast epithelial tissues. BMC Genomics 10 (1) , 324. 10.1186/1471-2164-10-324

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Abstract

Background: More than 20% of human transcripts have naturally occurring antisense products (or natural antisense transcripts – NATs), some of which may play a key role in a range of human diseases. To date, several databases of in silico defined human sense-antisense (SAS) pairs have appeared, however no study has focused on differential expression of SAS pairs in breast tissue. We therefore investigated the expression levels of sense and antisense transcripts in normal and malignant human breast epithelia using the Affymetrix HG-U133 Plus 2.0 and Almac Diagnostics Breast Cancer DSA microarray technologies as well as massively parallel signature sequencing (MPSS) data. Results: The expression of more than 2500 antisense transcripts were detected in normal breast duct luminal cells and in primary breast tumors substantially enriched for their epithelial cell content by DSA microarray. Expression of 431 NATs were confirmed by either of the other two technologies. A corresponding sense transcript could be identified on DSA for 257 antisense transcripts. Of these SAS pairs, 163 have not been previously reported. A positive correlation of differential expression between normal and malignant breast samples was observed for most SAS pairs. Orientation specific RT-QPCR of selected SAS pairs validated their expression in several breast cancer cell lines and solid breast tumours. Conclusion: Disease-focused and antisense enriched microarray platforms (such as Breast Cancer DSA) confirm the assumption that antisense transcription in the human breast is more prevalent than previously anticipated. Expression of a proportion of these NATs has already been confirmed by other technologies while the true existence of the remaining ones has to be validated. Nevertheless, future studies will reveal whether the relative abundances of antisense and sense transcripts have regulatory influences on the translation of these mRNAs.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Subjects: Q Science > Q Science (General)
Additional Information: Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/1471-2164/ (accessed 25/02/2014)
Publisher: BioMed Central
ISSN: 1471-2164
Date of First Compliant Deposit: 30 March 2016
Last Modified: 08 Jan 2020 03:46
URI: http://orca-mwe.cf.ac.uk/id/eprint/26136

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