2003
DOI: 10.1016/s0896-6273(03)00191-0
|View full text |Cite
|
Sign up to set email alerts
|

Cdk5-Mediated Inhibition of the Protective Effects of Transcription Factor MEF2 in Neurotoxicity-Induced Apoptosis

Abstract: Neurotoxic insults deregulate Cdk5 activity, which leads to neuronal apoptosis and may contribute to neurodegeneration. The biological activity of Cdk5 has been ascribed to its phosphorylation of cytoplasmic substrates. However, its roles in the nucleus remain unknown. Here we investigate the mechanism by which Cdk5 promotes neuronal apoptosis. We have identified the prosurvival transcription factor MEF2 as a direct nuclear target of Cdk5. Cdk5 phosphorylates MEF2 at a distinct serine in its transactivation do… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
3
1

Citation Types

5
281
1
1

Year Published

2005
2005
2019
2019

Publication Types

Select...
9

Relationship

0
9

Authors

Journals

citations
Cited by 244 publications
(288 citation statements)
references
References 54 publications
5
281
1
1
Order By: Relevance
“…28 Cdk5 may mediate neuronal apoptosis through two distinct mechanisms, a cytoplasmic mechanism that leads to cytoskeleton disruption 6 and a nuclear mechanism that interferes with the transcription of prosurvival genes. 68 Since the presence or absence of active Cdk5 does not appear to affect apoptosis or nonapoptotic cell death, the significance of these findings is unclear.…”
Section: Discussionmentioning
confidence: 99%
“…28 Cdk5 may mediate neuronal apoptosis through two distinct mechanisms, a cytoplasmic mechanism that leads to cytoskeleton disruption 6 and a nuclear mechanism that interferes with the transcription of prosurvival genes. 68 Since the presence or absence of active Cdk5 does not appear to affect apoptosis or nonapoptotic cell death, the significance of these findings is unclear.…”
Section: Discussionmentioning
confidence: 99%
“…However, with signaling that stimulates MEF2 factor trans-activity, the element functioned as an enhancer. It is established that MEF2 factors can activate or repress transcription, depending on associations with its protein interactors (5, 8, 29, 53, 56 -61) and on cell signaling activities (7,15,28,41,51,52,62). One major mechanism of repression involves class IIa histone deacetylases.…”
Section: Discussionmentioning
confidence: 99%
“…MEF2 proteins contribute to the orchestration of skeletal muscle differentiation (6,7) and fiber type programming (8,9), cardiac development and hypertrophy (10,11), and vascular development and smooth muscle proliferation (12)(13)(14). These factors are also involved in excitation-dependent neuron survival (15,16) and synapse formation (17,18). Some MEF2 factors are expressed in immune cells where they control T cell selection and activation and cytokine expression (19,20).…”
mentioning
confidence: 99%
“…Cdk5 activation is increased by cleavage of its regulatory protein p35 to p25 in response to neurotoxic insults. 37,38 Given the emerging link between both Cdk5 and tAIF and oxidative stress-induced neuronal cell death, [39][40][41][42] we hypothesized that oxidative stress-induced Cdk5 activation triggers neuronal cell death by inhibiting CHIP-mediated degradation of tAIF. In primary cultured Figure 3 Cdk5 negatively regulates CHIP-mediated tAIF degradation via UPS.…”
Section: Resultsmentioning
confidence: 99%