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Updated: Jun 8, 2026

Using Mouse Oocytes to Assess Human Gene Function During Meiosis I
11:13

Using Mouse Oocytes to Assess Human Gene Function During Meiosis I

Published on: April 10, 2018

ERK3 is required for metaphase-anaphase transition in mouse oocyte meiosis

Sen Li1, Xiang-Hong Ou, Zhen-Bo Wang

  • 1State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.

Plos One
|October 8, 2010
PubMed

Insights

Extracellular signal-regulated kinase 3 (ERK3) is essential for mouse oocyte meiosis. Its deletion impairs spindle stability and chromosome alignment, preventing successful cell division.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Developmental Biology

Background:

  • Extracellular signal-regulated kinase 3 (ERK3) is an atypical mitogen-activated protein (MAP) kinase.
  • Its function in mammalian oocyte meiosis remains largely uncharacterized.

Purpose of the Study:

  • To investigate the localization, expression, and function of ERK3 during mouse oocyte meiotic maturation.

Main Methods:

  • Immunofluorescent analysis to determine ERK3 localization.
  • Microinjection of ERK3 morpholino (MO) to assess functional roles.
  • Taxol treatment and low-temperature experiments to evaluate spindle and kinetochore-microtubule (K-MT) attachments.
  • Chromosome spreading assays to examine chromosome segregation.

Main Results:

  • ERK3 localizes to spindle fibers and asters throughout mouse oocyte meiotic maturation.
  • ERK3 deletion leads to MI stage arrest, spindle defects, chromosome misalignment, and disrupted K-MT attachments.
  • ERK3 deficiency prevents homologous chromosome segregation and delays spindle assembly checkpoint protein (BubR1) kinetochore localization.

Conclusions:

  • ERK3 is critical for maintaining spindle stability during mouse oocyte meiosis.
  • ERK3 is required for the metaphase-anaphase transition, ensuring proper chromosome segregation.

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