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Identification of new microRNAs in paired normal and tumor breast tissue suggests a dual role for the ERBB2/Her2 gene.

Persson, Helena LU ; Kvist, Anders LU ; Rego, Natalia; Staaf, Johan LU ; Vallon-Christersson, Johan LU ; Luts, Lena LU ; Loman, Niklas LU ; Jönsson, Göran B LU ; Naya, Hugo and Höglund, Mattias LU , et al. (2011) In Cancer Research 71(1). p.78-86
Abstract
To comprehensively characterize microRNA (miRNA) expression in breast cancer, we performed the first extensive next-generation sequencing expression analysis of this disease. We sequenced small RNA from tumors with paired samples of normal and tumor-adjacent breast tissue. Our results indicate that tumor identity is achieved mainly by variation in the expression levels of a common set of miRNAs rather than by tissue-specific expression. We also report 361 new, well-supported miRNA precursors. Nearly two-thirds of these new genes were detected in other human tissues and 49% of the miRNAs were found associated with Ago2 in MCF7 cells. Ten percent of the new miRNAs are located in regions with high-level genomic amplifications in breast... (More)
To comprehensively characterize microRNA (miRNA) expression in breast cancer, we performed the first extensive next-generation sequencing expression analysis of this disease. We sequenced small RNA from tumors with paired samples of normal and tumor-adjacent breast tissue. Our results indicate that tumor identity is achieved mainly by variation in the expression levels of a common set of miRNAs rather than by tissue-specific expression. We also report 361 new, well-supported miRNA precursors. Nearly two-thirds of these new genes were detected in other human tissues and 49% of the miRNAs were found associated with Ago2 in MCF7 cells. Ten percent of the new miRNAs are located in regions with high-level genomic amplifications in breast cancer. A new miRNA is encoded within the ERBB2/Her2 gene and amplification of this gene leads to overexpression of the new miRNA, indicating that this potent oncogene and important clinical marker may have two different biological functions. In summary, our work substantially expands the number of known miRNAs and highlights the complexity of small RNA expression in breast cancer. (Less)
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Contribution to journal
publication status
published
subject
in
Cancer Research
volume
71
issue
1
pages
78 - 86
publisher
American Association for Cancer Research Inc.
external identifiers
  • wos:000285826800010
  • pmid:21199797
  • scopus:78651394912
ISSN
1538-7445
DOI
10.1158/0008-5472.CAN-10-1869
project
CREATE Health
language
English
LU publication?
yes
id
97589375-f337-45c5-aca0-2458eee88b32 (old id 1777872)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/21199797?dopt=Abstract
date added to LUP
2011-02-01 10:31:50
date last changed
2017-06-25 04:39:30
@article{97589375-f337-45c5-aca0-2458eee88b32,
  abstract     = {To comprehensively characterize microRNA (miRNA) expression in breast cancer, we performed the first extensive next-generation sequencing expression analysis of this disease. We sequenced small RNA from tumors with paired samples of normal and tumor-adjacent breast tissue. Our results indicate that tumor identity is achieved mainly by variation in the expression levels of a common set of miRNAs rather than by tissue-specific expression. We also report 361 new, well-supported miRNA precursors. Nearly two-thirds of these new genes were detected in other human tissues and 49% of the miRNAs were found associated with Ago2 in MCF7 cells. Ten percent of the new miRNAs are located in regions with high-level genomic amplifications in breast cancer. A new miRNA is encoded within the ERBB2/Her2 gene and amplification of this gene leads to overexpression of the new miRNA, indicating that this potent oncogene and important clinical marker may have two different biological functions. In summary, our work substantially expands the number of known miRNAs and highlights the complexity of small RNA expression in breast cancer.},
  author       = {Persson, Helena and Kvist, Anders and Rego, Natalia and Staaf, Johan and Vallon-Christersson, Johan and Luts, Lena and Loman, Niklas and Jönsson, Göran B and Naya, Hugo and Höglund, Mattias and Borg, Åke and Rovira, Carlos},
  issn         = {1538-7445},
  language     = {eng},
  number       = {1},
  pages        = {78--86},
  publisher    = {American Association for Cancer Research Inc.},
  series       = {Cancer Research},
  title        = {Identification of new microRNAs in paired normal and tumor breast tissue suggests a dual role for the ERBB2/Her2 gene.},
  url          = {http://dx.doi.org/10.1158/0008-5472.CAN-10-1869},
  volume       = {71},
  year         = {2011},
}