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Updated: May 16, 2025

Quantitative Analysis of Protein Expression to Study Lineage Specification in Mouse Preimplantation Embryos
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Quantitative Analysis of Protein Expression to Study Lineage Specification in Mouse Preimplantation Embryos

Published on: February 22, 2016

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ZNHIT3 Regulates Translation to Ensure Cell Lineage Differentiation in Mouse Preimplantation Development

Guanghui Yang1, Qiliang Xin1, Jurrien Dean1

  • 1Laboratory of Cellular and Developmental Biology, NIDDK, National Institutes of Health, Bethesda, MD, 20892, USA.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|April 3, 2025
PubMed

Insights

Zinc finger, HIT type 3 (ZNHIT3) is crucial for early mouse development. Its absence impairs protein translation and ribosome assembly, halting embryonic development past the morula stage.

Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • Early mouse embryonic development relies on zygotic gene products after maternal factors degrade.
  • The box C/D small nucleolar ribonucleoprotein (snoRNP) complex is vital for ribosome biogenesis and mRNA splicing, processes essential for protein synthesis.
  • Zinc finger, HIT type 3 (ZNHIT3) has been identified as a component involved in the assembly of the box C/D snoRNP complex.

Purpose of the Study:

  • To investigate the role of Znhit3 in early mouse embryonic development.
  • To determine the impact of Znhit3 ablation on protein translation and embryonic progression.

Main Methods:

  • Gene editing in mice to create Znhit3 knockout models.
  • Analysis of embryonic development stages, protein translation levels, and RNA abundance.
  • Rescue experiments involving microinjection of Znhit3 complementary RNA (cRNA).

Main Results:

  • Znhit3 ablation in mice resulted in reduced protein translation and arrested embryonic development at the morula stage.
  • Absence of ZNHIT3 led to decreased small nucleolar RNA (snoRNA) and ribosomal RNA (rRNA) levels, causing ribosome and mRNA splicing defects.
  • Microinjection of Znhit3 cRNA partially rescued the developmental phenotype, confirming ZNHIT3's essential function.

Conclusions:

  • Znhit3 is an essential early embryonic gene in mice.
  • ZNHIT3 is required for proper mRNA translation during preimplantation development by ensuring snoRNA and rRNA abundance and ribosome function.
Keywords:
SMARM‐seqZNHIT3box C/D snoRNAembryo developmentfirst cell fate commitmentribosomal RNAsnoRNP complextranslation

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