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Related Experiment Videos

Protein synthesis in embryonic tissues during mouse postimplantation development.

K F Murach1, M Frei, D Gerhäuser

  • 1Department of Animal Biology, University of Geneva, Switzerland.

Journal of Cellular Biochemistry
|September 1, 1990
PubMed
Summary

Researchers studied protein synthesis in mouse embryos during early development. They found significant differences in protein expression across various tissues and developmental stages, suggesting changes in gene expression during mammalian differentiation.

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Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • Early mammalian development involves complex tissue differentiation.
  • Understanding protein synthesis is crucial for deciphering gene expression during embryogenesis.

Purpose of the Study:

  • To investigate newly synthesized proteins during mouse embryogenesis (days 7-9).
  • To analyze and compare protein synthesis across different embryonic tissue derivatives.
  • To identify stage-specific and lineage-specific changes in protein expression.

Main Methods:

  • Isolation and dissection of mouse embryos (NMRI strain) at days 7, 8, and 9 of gestation.
  • Incubation of intact embryos with 35S-methionine to label newly synthesized proteins.
  • Dissection of embryos into specific tissue fragments (e.g., trophoblast, endoderm, ectoderm, yolk sac, amnion, allantois).

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  • Analysis of protein synthesis using two-dimensional gel electrophoresis.

    • Main Results:

    • Significant quantitative and qualitative differences in protein synthesis were observed among various tissue fragments.
    • Differences in protein profiles were noted across the three investigated developmental stages (days 7-9).
    • Specific protein patterns were identified within the molecular weight range of 20,000-200,000 and isoelectric points of 4.5-8.0.

    Conclusions:

    • The observed protein synthesis differences reflect cell lineage-specific gene expression.
    • Developmental stage-specific changes in gene expression occur during early mammalian differentiation.
    • This study provides insights into the molecular mechanisms underlying embryonic development.