Transcription-Mediated Chimeric RNAs in Prostate Cancer: Time to Revisit Old Hypothesis?
Publication: OMICS: A Journal of Integrative Biology
Volume 18, Issue Number 10
Abstract
Chromosomal rearrangements and fusion genes play important roles in tumor development and progression. Four high-frequency prostate cancer-specific fusion genes were recently reported in Chinese cases. We attempted to confirm one of the fusion genes, USP9Y-TTTY15, by reverse transcription PCR, but detected the presence of the USP9Y-TTTY15 fusion transcript in cancer samples, nonmalignant prostate tissues, and normal tissues from other organs, demonstrating that it is a transcription-induced chimeric RNA, which is commonly produced in normal tissues. In 105 prostate cancer samples and case-matched adjacent nonmalignant tissues, we determined the expression level of USP9Y-TTTY15 and a previously reported transcription-induced chimeric RNA, SLC45A3-ELK4. The expression levels of both chimeric RNAs vary greatly in cancer and normal cells. USP9Y-TTTY15 expression is neither higher in cancer than adjacent normal tissues, nor correlated with features of advanced prostate cancer. Although the expression level of SLC45A3-ELK4 is higher in cancer than normal cells, and a dramatic increase in its expression from normal to cancer cells is correlated with advanced disease, its expression level in cancer samples alone is not correlated with any clinical parameters. These data show that both chimeric RNAs contribute less to prostate carcinogenesis than previously reported.
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Published In
OMICS: A Journal of Integrative Biology
Volume 18 • Issue Number 10 • October 2014
Pages: 615 - 624
PubMed: 25188740
Copyright
Copyright 2014, Mary Ann Liebert, Inc.
History
Published in print: October 2014
Published online: 26 September 2014
Published ahead of print: 4 September 2014
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The authors declare that no competing financial interests exist.
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