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Related Experiment Videos

Human interferons protect plants from virus infection.

P Orchansky, M Rubinstein, I Sela

    Proceedings of the National Academy of Sciences of the United States of America
    |April 1, 1982
    PubMed
    Summary

    Human leukocyte interferon and its recombinant form effectively suppress tobacco mosaic virus multiplication in plants. Fibroblast interferon

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    Area of Science:

    • Plant virology
    • Biochemistry
    • Immunology

    Background:

    • Interferons are key antiviral proteins in mammals.
    • Their activity against plant viruses is not well understood.
    • Tobacco mosaic virus is a significant plant pathogen.

    Purpose of the Study:

    • To investigate the antiviral activity of human interferons against tobacco mosaic virus in plants.
    • To compare the efficacy of different interferon types and sources.
    • To explore the mechanism of interferon action in plant systems.

    Main Methods:

    • Treatment of tobacco leaf discs with various forms of human interferon (unfractionated leukocyte, purified leukocyte, recombinant leukocyte, fibroblast).
    • Assessing the effect of interferon on tobacco mosaic virus replication.
    • Incubation of fibroblast interferon with glycosidases.
    • Reversibility studies by removing interferon.

    Main Results:

    • Human leukocyte interferon (unfractionated, purified, and recombinant) demonstrated significant suppression of tobacco mosaic virus multiplication.
    • Human fibroblast interferon showed variable activity, but its efficacy increased to levels comparable to leukocyte interferon after glycosidase treatment.
    • The antiviral effect of interferon was reversible, with virus multiplication resuming after interferon removal.

    Conclusions:

    • Human interferons, particularly leukocyte-derived forms, possess potent antiviral activity against tobacco mosaic virus in a plant model.
    • Glycosylation may influence the antiviral potency of fibroblast interferon.
    • Interferon's mechanism against plant viruses is potentially reversible, suggesting a dynamic interaction.

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