Journal of Experimental Medicine, volume 205, issue 11, pages 2499-2506

Myeloid cell differentiation arrest by miR-125b-1 in myelodysplasic syndrome and acute myeloid leukemia with the t(2;11)(p21;q23) translocation

Marina Bousquet 1
Cathy Quelen 1
Roberto Rosati 2
Véronique Mansat-De Mas 1, 3, 4
Roberta La Starza 2
Christian Bastard 5
Eric Lippert 6
Pascaline Talmant 7
Dominique Leroux 9
Carine Gervais 10
Franck Viguie 11
Jean Luc Lai 12
Christine Terré 13
Berna Beverlo 14
Costantina Sambani 15
Anne Hagemeijer 16
Peter Marynen 16
Georges Delsol 1, 3, 4
Nicole Dastugue 1, 4
Cristina Mecucci 2
Pierre Brousset 1, 3, 4
Show full list: 22 authors
1
 
Institut National de la Santé et de la Recherche Médicale, U563, Centre de Physiopathologie de Toulouse-Purpan, 31300 Toulouse, France
3
 
Université Paul Sabatier, 31062 Toulouse, France
4
 
Département de Pathologie et d'Hématologie Biologique, Centre Hospitalier Universitaire Purpan, 31059 Toulouse, France
6
 
Laboratoire d'Hématologie-Cytogénétique, Hôpital Haut-Lévêque, 33604 Pessac, France
7
 
Laboratoire de Cytogénétique Hématologique, Hôtel Dieu, 44035 Nantes, France
8
 
Laboratoire de Cytogénétique Hématologique, Centre Hospitalier Universitaire La Timone, 13005 Marseille, France
10
 
Laboratoire d'Hématologie Cellulaire et Cytogénétique, Centre Hospitalier Universitaire Haute-Pierre, 67098 Strasbourg, France
11
 
Laboratoire de Cytogénétique et d'Hématologie Biologique, Hôtel Dieu, 75181 Paris, France
13
 
Laboratoire de Cytogénétique et Transfusion Sanguine, BP122, 78150 Le-Chesnay, France
Publication typeJournal Article
Publication date2008-10-20
scimago Q1
wos Q1
SJR6.838
CiteScore26.6
Impact factor12.6
ISSN00221007, 15409538
Immunology
Immunology and Allergy
Abstract

Most chromosomal translocations in myelodysplastic syndromes (MDS) and acute myeloid leukemia (AML) involve oncogenes that are either up-regulated or form part of new chimeric genes. The t(2;11)(p21;q23) translocation has been cloned in 19 cases of MDS and AML. In addition to this, we have shown that this translocation is associated with a strong up-regulation of miR-125b (from 6- to 90-fold). In vitro experiments revealed that miR-125b was able to interfere with primary human CD34+ cell differentiation, and also inhibited terminal (monocytic and granulocytic) differentiation in HL60 and NB4 leukemic cell lines. Therefore, miR-125b up-regulation may represent a new mechanism of myeloid cell transformation, and myeloid neoplasms carrying the t(2;11) translocation define a new clinicopathological entity.

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