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Deup1 Expression Interferes with Multiciliated Differentiation.

Miram Shin1,2, Jiyeon Lee1,2, Haeryung Lee1,2

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|December 5, 2023
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Summary

Deuterosome clusters (DCs) formed by Deup1 inhibit multicilia formation. Gain-of-function of Deup1 impairs cerebrospinal fluid flow and multiciliated cell development.

Keywords:
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Area of Science:

  • Cell Biology
  • Developmental Biology
  • Cilia Biology

Background:

  • Deuterosomes are key organelles in ciliogenesis.
  • Previous studies indicated Deup1 loss doesn't affect centriole amplification or multicilia formation.

Purpose of the Study:

  • To investigate the effect of Deup1 gain-of-function on multiciliated ependymal cell development.
  • To understand the role of deuterosomes and deuterosome clusters (DCs) in ciliogenesis.

Main Methods:

  • Time-lapse microscopy to observe deuterosome fate during ependymal differentiation.
  • In utero electroporation to study DC presence in vivo.
  • Bead flow assay to assess cerebrospinal fluid dynamics.
  • Xenopus embryo model to evaluate Deup1 function.

Main Results:

  • Deuterosomes exhibit two fates: scattering and disappearance, or self-organization into deuterosome clusters (DCs).
  • DCs contain centriole components and are associated with primary cilia formation, not multiciliation.
  • DCs are transiently present during early postnatal development, suggesting antagonist activity.
  • Ectopic Deup1 expression impairs cerebrospinal fluid flow and inhibits multiciliated cell differentiation in both mammalian and Xenopus models.

Conclusions:

  • Deuterosome cluster formation by Deup1 inhibits the production of multiple centrioles.
  • Deup1 gain-of-function negatively impacts multiciliated cell development and function, potentially affecting cerebrospinal fluid dynamics.