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- W2023933604 abstract "In dividing cells, cyclin-dependent kinases (Cdks) are cell cycle-associated protein kinases that regulate proliferation, differentiation, senescence, and apoptosis. In neurons that no longer divide, deregulation of Cdks, especially Cdk5, occurs in many neurological disorders, including Alzheimer's disease (AD) and Parkinson's disease (PD). Cdk5 is a unique member of the Cdk family because it does not play a critical role in cell cycle progression, and it is not activated by a cyclin. Instead, Cdk5 normally is activated by the regulatory protein p35. This Cdk5/p35 activity has emerged as an important regulator of proper development of the mammalian central nervous system. In vitro studies suggest that aberrant activation of Cdk5 by an endogenous truncated version (p25) of p35 might be a key event in the process of neurodegeneration. One enzyme responsible for cleavage of p35 to form p25 is calpain, a calcium-activated protease that has been shown to be involved in neuronal cell death. Recent studies provided important in vivo evidence that hyperactivation and redistribution of Cdk5 by p25 plays an essential role in the phosphorylation of pathological substrates (such as tau) and the cell death of neurons in experimental models of AD and PD. Because amyloid β peptide, the primary neurotoxic component of amyloid plaques in AD, has been shown to increase the conversion of p35 to p25, aberrant activation of Cdk5 by p25 might be a pathway connecting amyloid β toxicity to tau hyperphosphorylation in AD." @default.
- W2023933604 created "2016-06-24" @default.
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- W2023933604 date "2003-12-17" @default.
- W2023933604 modified "2023-10-11" @default.
- W2023933604 title "Cyclin-Dependent Kinase 5--A Neuronal Killer?" @default.
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- W2023933604 doi "https://doi.org/10.1126/sageke.2003.50.pe36" @default.
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