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Published on: July 20, 2015

Genetic individuality of intracisternal A-particles of Mus musculus

K K Lueders, E L Kuff

    Journal of Virology
    |April 1, 1979
    PubMed

    Insights

    This study found no significant genetic relationship between mouse intracisternal A-particles and common murine B and C type viruses. These findings clarify the distinct nature of intracisternal A-particle RNA sequences.

    Area of Science:

    • Virology
    • Molecular Biology
    • Genetics

    Background:

    • Murine retroviruses, including B and C types, are significant in cancer research.
    • Intracisternal A-particles (A-particles) are endogenous retroviral elements found in mice.
    • Understanding the genetic relatedness of viral elements is crucial for studying their origins and functions.

    Purpose of the Study:

    • To investigate the nucleic acid sequence relationship between mouse intracisternal A-particles and murine type B and C viruses.
    • To determine if A-particles share genetic material with other known mouse retroviruses.

    Main Methods:

    • Utilized reciprocal complementary DNA-RNA hybridization techniques.
    • Prepared complementary DNAs from A-particle RNAs and hybridized them with RNAs from B and C type viruses.
    • Conversely, hybridized complementary DNAs from B and C type viruses with A-particle RNAs.
    • Defined homology based on consistent hybridization reaction ranges in homologous and heterologous reactions.

    Main Results:

    • No major sequence homologies were detected between intracisternal A-particle RNA and the RNA of representative type B and C viruses from Mus musculus.
    • Hybridization experiments did not reveal significant genetic overlap between these viral entities.

    Conclusions:

    • Intracisternal A-particles represent a distinct genetic entity separate from common murine type B and C viruses.
    • The findings suggest that A-particles do not share significant genomic sequences with these other murine retroviruses.

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