6533b81ffe1ef96bd1278856
RESEARCH PRODUCT
Neuronal cell cycle: the neuron itself and its circumstances.
María C Ovejero-benitoJosé María Fradesubject
ApoptosisBrdU 5-bromo-2′-deoxyuridineReviewp75NTR neurotrophin receptor p75Nervous SystemG0 quiescent stateCKI Cdk-inhibitorNeuronsCell DeathNeurodegenerationCell CycleapoptosisNeurodegenerative DiseasesCell cycleCell biologymedicine.anatomical_structureInk inhibitor of kinaseBDNF brain-derived neurotrophic factorp38MAPK p38 mitogen-activated protein kinaseG2 growth phase 2Programmed cell deathS-phasePD Parkinson diseaseRb RetinoblastomaMcm2 minichromosome maintenance 2PCNA proliferating cell nuclear antigenMitosisContext (language use)BiologyCdk cyclin-dependent kinaseCNS central nervous systemS-phase synthesis phase.Cip/Kip cyclin inhibitor protein/kinase inhibitor proteinmedicineAnimalsHumansMolecular BiologyMitosisTetraploidAD Alzheimer diseasecell cycle re-entryDNA replicationCell BiologyNeuronmedicine.diseaseG1 growth phase 1neuronRGCs retinal ganglion cellsCell cycle re-entrytetraploidnervous systemApoptosisNeuronDevelopmental Biologydescription
Neurons are usually regarded as postmitotic cells that undergo apoptosis in response to cell cycle reactivation. Nevertheless, recent evidence indicates the existence of a defined developmental program that induces DNA replication in specific populations of neurons, which remain in a tetraploid state for the rest of their adult life. Similarly, de novo neuronal tetraploidization has also been described in the adult brain as an early hallmark of neurodegeneration. The aim of this review is to integrate these recent developments in the context of cell cycle regulation and apoptotic cell death in neurons. We conclude that a variety of mechanisms exists in neuronal cells for G1/S and G2/M checkpoint regulation. These mechanisms, which are connected with the apoptotic machinery, can be modulated by environmental signals and the neuronal phenotype itself, thus resulting in a variety of outcomes ranging from cell death at the G1/S checkpoint to full proliferation of differentiated neurons.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-01-16 | Cell cycle (Georgetown, Tex.) |