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Interkinetic nuclear migration: a mysterious process in search of a function

Philip C Spear1, Carol A Erickson

  • 1Biochemistry, Molecular, Cellular and Developmental Biology Graduate Group, University California Davis, Davis, 95616, California, USA. pcspear@ucdavis.edu

Development, Growth & Differentiation
|April 25, 2012
PubMed

Insights

Interkinetic nuclear migration (INM) involves nuclei moving within epithelial cells during the cell cycle. This review explores INM mechanisms and functions across diverse tissues.

Area of Science:

  • Cell Biology
  • Developmental Biology
  • Epithelial Biology

Background:

  • Interkinetic nuclear migration (INM) is a dynamic process where nuclei reposition within epithelial cells, often preceding cell division.
  • This phenomenon is observed across numerous species and tissue types, highlighting its biological significance.
  • Current understanding of INM mechanisms, particularly the roles of cytoskeletal components and cell cycle regulation, remains incomplete.

Purpose of the Study:

  • To review and synthesize current knowledge on the regulation and mechanisms of interkinetic nuclear migration (INM).
  • To discuss the proposed functions of INM in various biological contexts.
  • To address controversies and identify knowledge gaps regarding INM.

Main Methods:

  • Literature review of studies investigating interkinetic nuclear migration.
  • Analysis of data from time-lapse microscopy and other experimental techniques.
  • Comparative examination of INM across different epithelial tissues and species.

Main Results:

  • INM is tightly coordinated with the cell cycle, with nuclear migration often preceding apical cytokinesis.
  • The precise cytoskeletal machinery (actin vs. microtubules) driving INM is debated and may be tissue-specific.
  • Variations in epithelial cell height and cell fate may contribute to differing observations of INM.

Conclusions:

  • INM is a conserved yet adaptable process crucial for epithelial development and tissue organization.
  • Further research is needed to resolve mechanistic debates and fully elucidate the functional importance of INM.
  • Understanding INM provides insights into cell cycle-epithelial interactions and tissue morphogenesis.

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