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Changes induced in the lymphoid system by the double-stranded RNA.

K Sůla, K Nouza

    Folia Biologica
    |January 1, 1984
    PubMed
    Summary

    Double-stranded RNA (ds RNA), an interferon inducer, significantly impacts lymphoid system weight and cellularity. Systemic and local injections alter lymph nodes, spleen, and thymus, with parameters returning to normal over time.

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    Area of Science:

    • Immunology
    • Molecular Biology

    Background:

    • Double-stranded RNA (ds RNA) is known to induce interferon production.
    • The effects of ds RNA on the immune system, particularly the lymphoid system, require detailed investigation.

    Purpose of the Study:

    • To investigate the impact of systemic and local ds RNA administration on lymphoid system parameters.
    • To characterize the temporal dynamics of these changes in various lymphoid organs.

    Main Methods:

    • Single systemic (intraperitoneal) or local (hind footpad) injection of ds RNA in mice.
    • Measurement of weight and cellularity in lymphoid organs (lymph nodes, spleen, thymus) and peritoneal cells at various time points post-inoculation.

    Main Results:

    • Systemic ds RNA increased lymphoid system weight and cellularity, with peak effects varying by organ (24-72 hours).
    • Thymus weight/cellularity and peritoneal cell counts decreased initially, then recovered.
    • Local ds RNA induced a pronounced increase in the ipsilateral popliteal lymph node, with systemic effects being less pronounced than i.p. injection.

    Conclusions:

    • ds RNA significantly modulates lymphoid system architecture and cellularity.
    • Both systemic and local administration routes elicit immune responses, affecting various lymphoid organs.
    • The study provides insights into the mechanisms of ds RNA-induced immune modulation.

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