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© Jacob SEELER & Anne DEJEAN, Institut Pasteur
Immunostaining of PML nuclear bodies involved in acute promyelocytic leukemia
Publication : Oncogene

HDAC4 mediates transcriptional repression by the acute promyelocytic leukaemia-associated protein PLZF

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Oncogene - 18 Nov 2004

Chauchereau A, Mathieu M, de Saintignon J, Ferreira R, Pritchard LL, Mishal Z, Dejean A, Harel-Bellan A

Link to Pubmed [PMID] – 15467736

Oncogene 2004 Nov;23(54):8777-84

PLZF, the promyelocytic leukaemia zinc-finger protein, is a transcriptional repressor essential to development. In some acute leukaemias, a chromosomal translocation fusing the PLZF gene to that encoding the retinoic acid receptor RARalpha gives rise to a fusion protein, PLZF-RARalpha, thought to be responsible for constitutive repression of differentiation-associated genes in these cells. Repression by both PLZF and PLZF-RARalpha is sensitive to the histone deacetylase inhibitor TSA, and PLZF was previously shown to interact physically with HDAC1, a class I histone deacetylase. We here asked whether class II histone deacetylases, known to be generally involved in differentiation processes, participate in the repression mediated by PLZF and PLZF-RARalpha, and found that PLZF interacts with HDAC4 in both GST-pull-down and co-immunoprecipitation assays. Furthermore, HDAC4 is indeed involved in PLZF and PLZF-RARalpha-mediated repression, since an enzymatically dead mutant of HDAC4 released the repression, as did an siRNA that blocks HDAC4 expression. Taken together, our data indicate that recruitment of HDAC4 is necessary for PLZF-mediated repression in both normal and leukaemic cells.

http://www.ncbi.nlm.nih.gov/pubmed/15467736