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• W2965591820 abstract "Cyclin-dependent kinase 5 (CDK5) in adipose tissue mediates peroxisome proliferator-activated receptor γ (PPARγ) phosphorylation at Ser273 to inhibit its activity, causing PPARγ target gene expression changes. Among these, insulin-degrading enzyme (IDE) degrades amyloid-β peptide (Aβ), the core pat hological product of Alzheimer’s disease (AD), whereas β-amyloid cleavage enzyme 1 (BACE1) hydrolyzes amyloid-β protein precursor (AβPP). Therefore, we speculated that CDK5 activity in the brain might participate in Aβ production, thereby functioning as a key molecule in AD pathogenesis. To confirm this hypothesis, we transduced primary rat hippocampal neurons using CDK5-expressing lentiviral vectors. CDK5 overexpression increased PPARγ Ser273 phosphorylation, decreased IDE expression, increased BACE1 and AβPP expression, increased Aβ levels, and induced neuronal apoptosis. The CDK5 inhibitor roscovitine effectively reversed these CDK5 overexpression-mediated effects. Moreover, silencing of the Cdk5 gene via CDK5 shRNA-expressing lentiviral vectors in primary hippocampal neurons did not exert any protective effect against normal neuronal apoptosis, nor were significant effects observed on Aβ levels, PPARγ phosphorylation, or PPARγ target gene expression in the cells. However, Cdk5 gene silencing exhibited a neuroprotective effect in the Aβ-induced AD neuron model by effectively inhibiting the Aβ-induced neuronal apoptosis, PPARγ phosphorylation, PPARγ expression downregulation, and PPARγ target gene expression changes, and reducing Aβ levels. In conclusion, this study demonstrated that CDK5 played an important role in the pathogenesis of AD. Specifically, CDK5 participated in Aβ production by regulating PPARγ phosphorylation. Targeted therapy against CDK5 could effectively reduce and reverse the neurotoxic effects of Aβ and may represent a novel approach for AD treatment." @default.
• W2965591820 created "2019-08-13" @default.
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• W2965591820 date "2019-09-17" @default.
• W2965591820 modified "2023-09-24" @default.
• W2965591820 title "CDK5 Participates in Amyloid-β Production by Regulating PPARγ Phosphorylation in Primary Rat Hippocampal Neurons" @default.
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• W2965591820 doi "https://doi.org/10.3233/jad-190026" @default.
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• W2965591820 hasPublicationYear "2019" @default.
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