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HDAC‐3 Participates in the Repression of e2f ‐Dependent Gene Transcription in Primary Differentiated Neurons
Author(s) -
PANTELEEVA IRINA,
ROUAUX CAROLINE,
LARMET YVES,
BOUTILLIER STÉPHANIE,
LOEFFLER JEANPHILIPPE,
BOUTILLIER ANNELAURENCE
Publication year - 2004
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1196/annals.1329.076
Subject(s) - e2f , neuroprotection , psychological repression , transcription factor , gene expression , transcription (linguistics) , gene , microbiology and biotechnology , apoptosis , chemistry , biology , genetics , neuroscience , linguistics , philosophy
A bstract : Activation of e2f‐1 gene expression is an event that has been now established in many models of neuronal apoptosis. Accumulated E2F‐1 protein has also been observed in post mortem brains obtained from patients suffering from different neurodegenerative diseases. We have previously shown in primary neuronal cultures that e2f‐1 gene transcription was actively repressed in neuroprotective conditions through HDAC‐dependent regulation on the E2F‐responsive elements (E2F‐REs) located in the e2f‐1 gene promoter. Here, we further investigated the protein complex bound to these sites by gel shift analysis. We found that the specific protein binding to E2F‐REs is altered in apoptotic conditions compared to neuroprotective conditions, suggesting that the proteic constituents of the complex are likely to be modified upon apoptosis onset. Indeed, Western blot analysis showed a time‐dependent degradation of the Rb/E2F binding protein HDAC‐3 during apoptosis, a degradation that is caspase‐dependent. Altogether, these data point to HDAC‐3 as a good candidate involved in the active e2f‐1 repression necessary for neuroprotection.