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Published in: Journal of Experimental & Clinical Cancer Research 1/2011

Open Access 01-12-2011 | Research

MEIS1, PREP1, and PBX4 Are Differentially Expressed in Acute Lymphoblastic Leukemia: Association of MEIS1 Expression with Higher Proliferation and Chemotherapy Resistance

Authors: Judith A Rosales-Aviña, Jorge Torres-Flores, Adriana Aguilar-Lemarroy, Carmen Gurrola-Díaz, Georgina Hernández-Flores, Pablo C Ortiz-Lazareno, José M Lerma-Díaz, Ruth de Celis, Óscar González-Ramella, Esperanza Barrera-Chaires, Alejandro Bravo-Cuellar, Luis F Jave-Suárez

Published in: Journal of Experimental & Clinical Cancer Research | Issue 1/2011

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Abstract

Background

The Three-amino acid-loop-extension (TALE) superfamily of homeodomain-containing transcription factors have been implicated in normal hematopoiesis and in leukemogenesis and are important survival, differentiation, and apoptosis pathway modulators. In this work, we determined the expression levels of TALE genes in leukemic-derived cell lines, in blood samples of patients with Acute lymphoblastic leukemia (ALL), and in the blood samples of healthy donors.

Results

Here we show increased expression of MEIS1, MEIS2, and PREP1 genes in leukemia-derived cell lines compared with blood normal cells. High levels of MEIS1 and PREP1, and low levels of PBX4 expression were also founded in samples of patients with ALL. Importantly, silencing of MEIS1 decreases the proliferation of leukemia-derived cells but increases their survival after etoposide treatment. Etoposide-induced apoptosis induces down-regulation of MEIS1 expression or PREP1 up-regulation in chemotherapy-resistant cells.

Conclusions

Our results indicate that up-regulation of MEIS1 is important for sustaining proliferation of leukemic cells and that down-regulation of MEIS1 or up-regulation of PREP1 and PBX genes could be implicated in the modulation of the cellular response to chemotherapeutic-induced apoptosis.
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Metadata
Title
MEIS1, PREP1, and PBX4 Are Differentially Expressed in Acute Lymphoblastic Leukemia: Association of MEIS1 Expression with Higher Proliferation and Chemotherapy Resistance
Authors
Judith A Rosales-Aviña
Jorge Torres-Flores
Adriana Aguilar-Lemarroy
Carmen Gurrola-Díaz
Georgina Hernández-Flores
Pablo C Ortiz-Lazareno
José M Lerma-Díaz
Ruth de Celis
Óscar González-Ramella
Esperanza Barrera-Chaires
Alejandro Bravo-Cuellar
Luis F Jave-Suárez
Publication date
01-12-2011
Publisher
BioMed Central
Published in
Journal of Experimental & Clinical Cancer Research / Issue 1/2011
Electronic ISSN: 1756-9966
DOI
https://doi.org/10.1186/1756-9966-30-112

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