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Microtubules in Signaling01:22

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The primary cilium, made up of microtubules, acts as antennae on the cell surfaces for relaying external stimuli into the cells. These fine hair-like structures are present, generally one per cell. These are non-motile cilia in a 9+0 microtubules arrangement, where the central pair of microtubules are absent. The primary cilia arise from the basal body embedded in the cell membrane. Intraflagellar transport (IFT) carries requisite proteins from the cytoplasm to the cilium because the primary...
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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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Related Experiment Video

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Simple Detection of Primary Cilia by Immunofluorescence
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[Interplay between primary cilia and cell cycle].

Nathalie Delgehyr1, Nathalie Spassky1

  • 1Institut de biologie de l'École normale supérieure (IBENS), 46, rue d'Ulm, 75005 Paris, France - Inserm U1024, 75005 Paris, France - CNRS UMR 8197, 75005 Paris, France.

Medecine Sciences : M/S
|November 13, 2014
PubMed
Summary
This summary is machine-generated.

The primary cilium, crucial for cell cycle regulation, plays a key role in cell fate determination. Its formation and resorption are vital for cellular progression and signaling pathways.

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Developmental Biology

Context:

  • The primary cilium is typically associated with the G0 and G1 phases of the cell cycle.
  • Recent research links cilium formation and resorption to cell cycle regulators like Aurora A and polo-like kinase 1 (PLK1).
  • Cilium resorption is critical for S-phase progression and cellular determination, especially in neural stem cells.

Purpose:

  • To explore the role of the primary cilium in cell cycle regulation.
  • To investigate the molecular mechanisms connecting primary cilia dynamics to cell cycle progression.
  • To understand the significance of primary cilia in cellular fate and differentiation.

Summary:

  • The primary cilium, a key cellular organelle, is intricately involved in cell cycle progression, particularly during the G0 and G1 phases.
  • Its formation and resorption are tightly regulated by molecular actors such as Aurora A and PLK1.
  • Resorption of the primary cilium is essential for entering S-phase and for cellular determination, with notable implications for neural stem cells.
  • As a cellular antenna, the primary cilium transmits critical signaling pathways that influence cellular fate.

Impact:

  • Provides insights into the fundamental mechanisms of cell cycle control.
  • Highlights the primary cilium's role beyond a simple cellular antenna, emphasizing its regulatory functions.
  • Offers potential targets for understanding and treating developmental disorders and cancer, where cell cycle dysregulation is common.