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Related Experiment Videos

Retroviruses in human tumors.

R Kurth, J Löwer, R Löwer

    Archiv Fur Geschwulstforschung
    |January 1, 1983
    PubMed
    Summary

    Retrovirus-like particles found in human teratocarcinomas exhibit unique features and reverse transcriptase activity. Human T-cell lymphoma viruses (HTLV) are identified as pathogenic, linked to adult T-cell leukemia/lymphoma.

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    Area of Science:

    • Virology
    • Molecular Biology
    • Oncology

    Background:

    • Retroviruses have been studied for their role in tumorigenesis and as tools for understanding eukaryotic gene expression.
    • Retrovirus-like particles have been observed in human teratocarcinomas cultured in vitro.

    Purpose of the Study:

    • To present evidence of retrovirus-like particles in human teratocarcinomas.
    • To characterize these particles and compare them to known animal retroviruses.
    • To summarize data on human T-cell lymphoma viruses (HTLV) and their pathogenic role.

    Main Methods:

    • Morphological analysis of retrovirus-like particles.
    • Biochemical assays for reverse transcriptase activity.
    • Sucrose gradient centrifugation to determine particle density.
    • Immunological assays for distinguishing viral strains.

    Main Results:

    • Retrovirus-like particles in human teratocarcinomas are morphologically similar to animal retroviruses but possess unique structural features.
    • These particles exhibit endogenous reverse transcriptase activity and a density of 1.16 g/ml, characteristic of retroviruses.
    • Immunological analysis distinguishes these particles from animal retrovirus strains.
    • Human T-cell lymphoma viruses (HTLV) are implicated in the etiology of human adult T-cell leukemia/lymphoma.

    Conclusions:

    • Human teratocarcinomas harbor retrovirus-like particles with distinct characteristics.
    • HTLV represents the first identified pathogenic human retroviruses, linked to specific leukemias/lymphomas.

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