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[A and C particles in mouse embryos].

J R Maisin, M Lambiet-Collier, M Janowski

    Comptes Rendus Des Seances De La Societe De Biologie Et De Ses Filiales
    |January 1, 1978
    PubMed
    Summary
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    Murine embryos exhibit distinct intracisternal A-type and C-type viral particles during development. AKR strain embryos show a higher prevalence of these particles compared to BALB/c strain embryos, particularly at later developmental stages.

    Area of Science:

    • Developmental Biology
    • Virology
    • Electron Microscopy

    Context:

    • Murine embryos (BALB/c and AKR strains) were examined using electron microscopy.
    • The study focused on the presence and types of viral particles during embryonic development.
    • Viral particle occurrence was analyzed from the 1-cell stage to 14 days of age.

    Purpose:

    • To characterize the types of intracisternal A particles and C particles in developing mouse embryos.
    • To investigate the relationship between embryonic developmental stage and the presence of viral particles.
    • To compare the prevalence of these particles between BALB/c and AKR mouse strains.

    Summary:

    • Electron microscopy revealed two types of intracisternal A particles, budding C particles, and dense-cored vesicles associated with the endoplasmic reticulum.

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  • The occurrence of these particles was highly dependent on embryonic developmental stage.
  • AKR embryos showed a higher frequency of A particles in early stages (1-16 blastomeres) and significantly more C particles in later stages (7 and 14 days) compared to BALB/c embryos.

    • Impact:

    • Provides insights into the developmental regulation of viral particle expression in mouse embryos.
    • Highlights strain-specific differences in viral particle prevalence, potentially relevant for understanding genetic susceptibility.
    • Contributes to the understanding of endogenous retroviruses and their interaction with host development.