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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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Protocols to induce and study ciliogenesis.

Paula Moreno-Cruz1, Yaiza Corral Nieto1, Laura Manrique Garcia1

  • 1Departamento de Fisiología, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain.

Methods in Cell Biology
|March 26, 2023
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Primary cilia (PC) act as cellular antennas. This study details protocols for inducing and visualizing PC, crucial for understanding ciliopathies and related diseases.

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Primary cilia (PC) are crucial sensory organelles functioning as cellular antennas.
  • PC assembly, known as ciliogenesis, is vital for embryonic development, cell cycle regulation, and homeostasis.
  • PC presence is incompatible with cell division, as cilia retract before mitosis.

Purpose of the Study:

  • To provide detailed protocols for inducing ciliogenesis in vitro.
  • To describe methods for visualizing primary cilia using immunofluorescence microscopy.
  • To facilitate research into ciliopathies by standardizing cilia induction and visualization techniques.

Main Methods:

  • Induction of ciliogenesis via serum deprivation (growth factor influence).
  • Pharmacological induction using cell cycle inhibitors (staurosporine, etoposide).
  • Induction via contact inhibition (physiological cell cycle inhibition).
  • Visualization of primary cilia using immunofluorescence microscopy.

Main Results:

  • Established reliable methods for inducing primary cilia formation in cultured cells.
  • Validated immunofluorescence microscopy as an effective technique for PC visualization.
  • Demonstrated that various stimuli related to cell cycle arrest trigger ciliogenesis.

Conclusions:

  • Standardized protocols for ciliogenesis induction and PC visualization are essential for studying ciliopathies.
  • The described methods provide a foundation for reproducible research in ciliary biology.
  • Accurate assessment of ciliogenesis is critical for diagnosing and understanding diseases linked to ciliary dysfunction.