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Dadun > Depósito Académico > CIMA (Centro de Investigación Médica Aplicada) > Área de Oncología > Terapia celular > DA - CIMA - Oncología - Terapia celular - Artículos de Revista >

BCR-ABL1-induced expression of HSPA8 promotes cell survival in chronic myeloid leukaemia
Authors: San-Jose, E. (Edurne)
Roman-Gomez, J. (José)
Cordeu, L. (Lucía)
Ballestar, E. (E.)
Garate, L. (Leire)
Andreu, E.J. (Enrique José)
Isidro, I. (Isabel)
Guruceaga, E. (Elizabeth)
Jimenez-Velasco, A. (A.)
Heiniger, A. (A.)
Torres, A. (Antonio)
Calasanz, M.J. (María José)
Esteller, M. (Manel)
Gutierrez, N.C. (N. C.)
Rubio, A. (Ángel)
Perez-Roger, I. (Ignacio)
Aguirre, X. (Xavier)
Prosper, F. (Felipe)
Keywords: Chronic myeloid leukaemia
Signal transduction
HSPA8
CD34+
Issue Date: 2008
Publisher: Wiley-Blackwell
Publisher version: http://www.wiley.com/bw/journal.asp?ref=0007-1048&site=1
ISSN: 0007-1048
Citation: San José-Enériz, E., Román-Gómez, J., Cordeu, L. , Ballestar, E. et al. Br. j. haematol. 2008; 142: 571–582
Abstract
In order to determine new signal transduction pathways implicated in chronic myeloid leukaemia (CML), we performed a gene expression profile comparison between CD34+ cells from CML patients and healthy donors. Functional studies were performed using the Mo7e and Mo7e-p210 cell lines. Expression of CCND1 (Cyclin D1), as well as the chaperone HSPA8, which is important for regulation of CCND1, were significantly upregulated in CD34+ CML cells. Upregulation of HSPA8 was dependent, at least in part, on STAT5 (signal transducer and activator of transcrition 5)-dependent transcriptional activation, as demonstrated by chromatin immunoprecipitation. The presence of HSPA8 in the nuclear protein fraction as well as its binding to CCND1 suggests that it may contribute to stabilization of the CCND1/CDK4 complex, which, in turn, may participate in proliferation of CML cells. Treatment of CML cells with the specific HSPA8 inhibitor 15-deoxyspergualin induced inhibition of CML cell viability but did not induce apoptosis. In conclusion, our studies suggest that STAT5-mediated activation of HSPA8 induces nuclear translocation and activation of the CCND1/CDK4 complex leading to increased proliferation of CML cells, deciphering a new pathway implicated in CML and supporting a potential role of chaperone inhibitors in the treatment of CML.
Permanent link: http://hdl.handle.net/10171/17827
Appears in Collections:DA - CIMA - Oncología - Síndromes mieloproliferativos - Artículos de Revista
DA - CIMA - Oncología - Terapia celular - Artículos de Revista
DA - CUN - Área de Terapia Celular - Artículos de revista
DA - Medicina - Hematología - Artículos de revista

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