Title : Interference of CREB-dependent transcriptional activation by expanded polyglutamine stretches--augmentation of transcriptional activation as a potential therapeutic strategy for polyglutamine diseases.

Pub. Date : 2005 May

PMID : 15836624






5 Functional Relationships(s)
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1 The phosphorylation of cAMP-responsive element binding protein (CREB) and induction of c-Fos in response to cAMP were strongly suppressed in Neuro2a cells expressing expanded polyglutamine. Cyclic AMP cAMP responsive element binding protein 1 Mus musculus
2 The suppression of CREB-dependent transcriptional activation was reversibly rescued by increasing the concentration of cAMP. Cyclic AMP cAMP responsive element binding protein 1 Mus musculus
3 Expanded polyglutamine-induced cytotoxicity was also substantially suppressed by augmenting CREB-dependent transcriptional activation with a high concentration of cAMP. Cyclic AMP cAMP responsive element binding protein 1 Mus musculus
4 The co-expression of dominant-negative CREB vectors considerably abrogated the suppressive effect of cAMP and FR901228 on the expanded polyglutamine-induced nuclear fragmentation, suggesting that these compounds suppress polyglutamine-induced cytotoxicity, largely, via the enhancement of CREB-dependent transcriptional activation. Cyclic AMP cAMP responsive element binding protein 1 Mus musculus
5 The co-expression of dominant-negative CREB vectors considerably abrogated the suppressive effect of cAMP and FR901228 on the expanded polyglutamine-induced nuclear fragmentation, suggesting that these compounds suppress polyglutamine-induced cytotoxicity, largely, via the enhancement of CREB-dependent transcriptional activation. Cyclic AMP cAMP responsive element binding protein 1 Mus musculus