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Related Concept Videos

Inhibition of Cdk Activity02:34

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The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
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Mitotic cell division results in daughter cells that exactly resemble the parent cell. However, errors in the DNA replication or distribution of genetic material may lead to genetic mutations that may be passed down to every new cell formed from the resulting abnormal cell. Propagation of such mutant cells is restricted through checkpoint mechanisms present at different stages of the cell cycle. These checkpoints involve regulator molecules that either promote or demote cell cycle events.
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To consistently produce healthy cells, the cell cycle—the process that generates daughter cells—must be precisely regulated.
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Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
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Genetic Manipulation of Cerebellar Granule Neurons In Vitro and In Vivo to Study Neuronal Morphology and Migration
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Cdk5 Regulates Activity-Dependent Gene Expression and Dendrite Development.

Zhuoyi Liang1, Tao Ye1, Xiaopu Zhou1

  • 1Division of Life Science, Molecular Neuroscience Center, and State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|November 13, 2015
PubMed
Summary
This summary is machine-generated.

Cyclin-dependent kinase 5 (Cdk5) moves to the nucleus during neuronal activity to control gene expression, guiding dendrite development. This process is vital for brain connectivity and information processing.

Keywords:
BDNFMeCP2dendriteneurotrophinnuclear translocationtranscription

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Genetics

Background:

  • Dendrite development and arborization are crucial for neural connectivity and brain function.
  • Neuronal activity shapes dendrite morphology, but the molecular mechanisms are not fully understood.

Purpose of the Study:

  • To investigate the role of cyclin-dependent kinase 5 (Cdk5) in activity-dependent dendrite development.
  • To elucidate the molecular mechanisms linking neuronal activity to gene transcription controlling dendritic growth.

Main Methods:

  • Utilized cultured rat neurons.
  • Investigated the nuclear translocation of Cdk5 upon membrane depolarization.
  • Performed genome-wide transcriptome analysis to identify Cdk5-regulated genes.
  • Examined the phosphorylation of methyl-CpG-binding protein 2 by Cdk5.

Main Results:

  • Cdk5 accumulates in the nucleus during membrane depolarization, regulating gene expression.
  • Cdk5 controls the transcription of brain-derived neurotrophic factor (BDNF).
  • Cdk5 phosphorylates methyl-CpG-binding protein 2, a transcriptional repressor.

Conclusions:

  • Nuclear import of Cdk5 is essential for activity-dependent dendrite development.
  • Cdk5 regulates neuronal gene transcription, including BDNF, crucial for dendritic growth.
  • This study reveals a novel mechanism for how neuronal activity influences brain development via nuclear Cdk5 signaling.