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Published in: BMC Cancer 1/2018

Open Access 01-12-2018 | Research article

MiR-10a and HOXB4 are overexpressed in atypical myeloproliferative neoplasms

Authors: Pierre-Yves Dumas, Olivier Mansier, Valerie Prouzet-Mauleon, Junji Koya, Arnaud Villacreces, Philippe Brunet de la Grange, Damien Luque Paz, Audrey Bidet, Jean-Max Pasquet, Vincent Praloran, Franck Salin, Mineo Kurokawa, François-Xavier Mahon, Bruno Cardinaud, Eric Lippert

Published in: BMC Cancer | Issue 1/2018

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Abstract

Background

Atypical Myeloproliferative Neoplasms (aMPN) share characteristics of MPN and Myelodysplastic Syndromes. Although abnormalities in cytokine signaling are common in MPN, the pathophysiology of atypical MPN still remains elusive. Since deregulation of microRNAs is involved in the biology of various cancers, we studied the miRNome of aMPN patients.

Methods

MiRNome and mutations in epigenetic regulator genes ASXL1, TET2, DNMT3A, EZH2 and IDH1/2 were explored in aMPN patients. Epigenetic regulation of miR-10a and HOXB4 expression was investigated by treating hematopoietic cell lines with 5-aza-2’deoxycytidine, valproic acid and retinoic acid. Functional effects of miR-10a overexpression on cell proliferation, differentiation and self-renewal were studied by transducing CD34+ cells with lentiviral vectors encoding the pri-miR-10a precursor.

Results

MiR-10a was identified as the most significantly up-regulated microRNA in aMPN. MiR-10a expression correlated with that of HOXB4, sitting in the same genomic locus. The transcription of these two genes was increased by DNA demethylation and histone acetylation, both necessary for optimal expression induction by retinoic acid. Moreover, miR-10a and HOXB4 overexpression seemed associated with DNMT3A mutation in hematological malignancies. However, overexpression of miR-10a had no effect on proliferation, differentiation or self-renewal of normal hematopoietic progenitors.

Conclusions

MiR-10a and HOXB4 are overexpressed in aMPN. This overexpression seems to be the result of abnormalities in epigenetic regulation mechanisms. Our data suggest that miR-10a could represent a simple marker of transcription at this genomic locus including HOXB4, widely recognized as involved in stem cell expansion.
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Metadata
Title
MiR-10a and HOXB4 are overexpressed in atypical myeloproliferative neoplasms
Authors
Pierre-Yves Dumas
Olivier Mansier
Valerie Prouzet-Mauleon
Junji Koya
Arnaud Villacreces
Philippe Brunet de la Grange
Damien Luque Paz
Audrey Bidet
Jean-Max Pasquet
Vincent Praloran
Franck Salin
Mineo Kurokawa
François-Xavier Mahon
Bruno Cardinaud
Eric Lippert
Publication date
01-12-2018
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2018
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/s12885-018-4993-2

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