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Defining the Program of Maternal mRNA Translation during In vitro Maturation using a Single Oocyte Reporter Assay
08:00

Defining the Program of Maternal mRNA Translation during In vitro Maturation using a Single Oocyte Reporter Assay

Published on: June 16, 2021

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RNA-associated protein LSM family member 14 controls oocyte meiotic maturation through regulating mRNA pools

Teng Zhang1,2, Yuanyuan Li3, Hui Li1,2

  • 1State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.

The Journal of Reproduction and Development
|May 2, 2017
PubMed

Insights

The RNA-associated protein LSM14b is crucial for oocyte meiotic maturation. Its absence causes meiotic arrest and chromosome misalignment by affecting mRNA storage and protein expression.

Area of Science:

  • Reproductive Biology
  • Molecular Cell Biology
  • Genetics

Background:

  • LSM family member 14 (LSM14) proteins are RNA-associated proteins involved in mRNA storage.
  • Oocyte meiotic maturation is a complex process critical for female fertility.

Purpose of the Study:

  • To investigate the role of LSM14b in oocyte meiotic maturation.
  • To identify the molecular mechanisms by which LSM14b regulates this process.

Main Methods:

  • Gene silencing or knockout of LSM14b in oocytes.
  • Microscopy to assess chromosome alignment and spindle formation.
  • Analysis of cell cycle regulators like Cyclin B1 and Cdc20 mRNA levels.

Main Results:

  • LSM14b deficiency resulted in oocyte meiotic arrest at metaphase.
  • Absence of LSM14b led to chromosome misalignment and abnormal spindle assembly.
  • Maturation promoting factor (MPF) activation was impaired in LSM14b-deficient oocytes.
  • Levels of Cyclin B1 and Cdc20 mRNAs were altered, suggesting they are LSM14b targets.

Conclusions:

  • LSM14b is essential for successful oocyte meiotic maturation.
  • LSM14b regulates oocyte maturation by controlling mRNA storage and subsequent protein expression.
  • Dysregulation of LSM14b impacts key meiotic processes including chromosome segregation and cell cycle progression.
Keywords:
CDC20LSM family member 14 (LSM14)OocytesRNA-associated proteinmRNA degradation

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