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Related Experiment Videos

Analogues in immunology.

F Dammacco, N Campobasso, E Altomare

    La Ricerca in Clinica E in Laboratorio
    |April 1, 1984
    PubMed
    Summary

    Immune system functions exhibit biological rhythms, including T lymphocyte variations. These circadian rhythms are linked to hormone analogues and have implications for diseases and treatments in chronoimmunology.

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    Area of Science:

    • Immunology
    • Chronobiology
    • Endocrinology

    Background:

    • Immune functions, including lymphocyte counts and hypersensitivity responses, display biological rhythmicity, particularly circadian patterns.
    • Rhythmic variations in T helper (TH) and T suppressor/cytotoxic (Ts) cells have been observed, influenced by lymphocyte compartmentalization in lymphoid organs.

    Purpose of the Study:

    • To investigate rhythmic variations in lymphocyte subsets (T lymphocytes, TH, and Ts cells).
    • To explore the role of synthetic hormone analogues, such as ACTH 1-17, in immune regulation and chronoimmunology.
    • To assess the immune response to synthetic peptide analogues.

    Main Methods:

    • Utilized monoclonal antibodies to detect rhythmic variations in total T lymphocytes and their subsets (TH and Ts).
    • Screened human serum samples using radioimmunoassay to detect antibodies against synthetic ACTH 1-17.
    • Conducted experiments to raise antisera against ACTH 1-17 peptide analogue.

    Main Results:

    • Confirmed circadian variations in total T lymphocytes, TH cells, and Ts cells, attributed to lymphocyte redistribution.
    • Demonstrated biological rhythms in clinical contexts like rheumatoid arthritis, allograft rejection, and chemoimmunotherapy.
    • Reported negative results in screening for anti-ACTH 1-17 antibodies in patients treated with the synthetic peptide.

    Conclusions:

    • Circadian rhythms significantly influence immunological functions and clinical outcomes.
    • Synthetic analogues of thymic and adrenal corticotropic hormones play a role in immune regulation.
    • Advances in chronoimmunology are driven by understanding immune rhythms and hormonal influences.

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