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Published in: Journal of Experimental & Clinical Cancer Research 1/2018

Open Access 01-12-2018 | Research

Aberrant miRNAs expressed in HER-2 negative breast cancers patient

Authors: Cornelia Braicu, Lajos Raduly, Gabriela Morar-Bolba, Roxana Cojocneanu, Ancuta Jurj, Laura-Ancuta Pop, Valentina Pileczki, Cristina Ciocan, Alin Moldovan, Alexandru Irimie, Alexandru Eniu, Patriciu Achimas-Cadariu, Angelo Paradiso, Ioana Berindan-Neagoe

Published in: Journal of Experimental & Clinical Cancer Research | Issue 1/2018

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Abstract

Background

Breast cancer is a highly heterogeneous pathology, exhibiting a number of subtypes commonly associated with a poor outcome. Due to their high stability, microRNAs are often regarded as non-invasive cancer biomarkers, having an expression pattern specific for their ‘cell of origin’.

Method

Triple negative breast cancer (TNBC: ER-, PR-, Her-2-) and double positive breast cancer (DPBC: ER+, PR+, Her-2) miRNA expression patterns were obtained by analysis of the TCGA (The Cancer Genome Atlas) data, followed by PCR-array analysis on plasma samples from 20 TNBC patients, 14 DPBC patients and 11 controls.

Results

Three downregulated and nine upregulated miRNAs were obtained from the TNBC analysis. Five overexpressed miRNAs were identified in the DPBC group. Four of the dysregulated miRNAs (miR-10a, miR-125b, miR-210 and miR-489) were common for both groups. The cluster miR-17-92 (miR-17, miR-20a, miR-20b, and miR-93), along with miR-130, miR-22 and miR-29a/c, were found to differentiate between TNBC and DPBC. A panel of five transcripts (miR-10a, miR-125, miR-193b, miR-200b and miR-489) was validated in a new set of plasma samples. The overlapping of TCGA and plasma profiling data revealed miR-200b, miR-200c, miR-210 and miR-29c as common signature. MiR-200b was validated on additional normal and tumor tissue samples. The expression level of this transcript from the TCGA data was correlated with lung and bone metastatic genes.

Conclusion

The miR-200b presents a great potential for the future advancements in the diagnostic/prognostic and therapeutic approach of TNBC, along with other coding or non-coding transcripts. However, this needs to be further integrated in a regulatory network that acts in conjunction with other markers that affect the patients’ prognosis or response to therapy.
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Metadata
Title
Aberrant miRNAs expressed in HER-2 negative breast cancers patient
Authors
Cornelia Braicu
Lajos Raduly
Gabriela Morar-Bolba
Roxana Cojocneanu
Ancuta Jurj
Laura-Ancuta Pop
Valentina Pileczki
Cristina Ciocan
Alin Moldovan
Alexandru Irimie
Alexandru Eniu
Patriciu Achimas-Cadariu
Angelo Paradiso
Ioana Berindan-Neagoe
Publication date
01-12-2018
Publisher
BioMed Central
Published in
Journal of Experimental & Clinical Cancer Research / Issue 1/2018
Electronic ISSN: 1756-9966
DOI
https://doi.org/10.1186/s13046-018-0920-2

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