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- W4386887528 abstract "Abstract The role of cyclin-dependent kinases (CDKs) that are ubiquitously expressed in the adult nervous system remains unclear. Cdk12 is enriched in terminally differentiated neurons where its conical role in the cell cycle progression is redundant. We find that in adult neurons Cdk12 acts a negative regulator of actin formation, mitochondrial dynamics and neuronal physiology. Cdk12 maintains the size of the axon at sites proximal to the cell body through the transcription of homeostatic enzymes in the 1-carbon by folate pathway which utilize the amino acid homocysteine. Loss of Cdk12 leads to elevated homocysteine and in turn leads to uncontrolled F-actin formation and axonal swelling. Actin remodeling further induces Drp1-dependent fission of mitochondria and the breakdown of axon-soma filtration barrier allowing soma restricted cargos to enter the axon. We demonstrate that Cdk12 is also an essential gene for long-term neuronal survival and loss of this gene causes age-dependent neurodegeneration. Hyperhomocysteinemia, actin changes, and mitochondrial fragmentation are associated with several neurodegenerative conditions such as Alzheimer’s disease and we provide a candidate molecular pathway to link together such pathological events." @default.
- W4386887528 created "2023-09-21" @default.
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- W4386887528 date "2023-09-20" @default.
- W4386887528 modified "2023-10-15" @default.
- W4386887528 title "Cdk12 maintains the integrity of adult axons by suppressing actin remodeling" @default.
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- W4386887528 doi "https://doi.org/10.1038/s41420-023-01642-4" @default.
- W4386887528 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37730761" @default.
- W4386887528 hasPublicationYear "2023" @default.
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