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Related Experiment Videos

Alpha-fetoprotein and human lymphocyte subpopulations.

S Gupta, R A Good

    Journal of Immunology (Baltimore, Md. : 1950)
    |February 1, 1977
    PubMed
    Summary

    Alpha-fetoprotein (AFP) increases "active" T lymphocytes but depresses their response to phytohemagglutinin. This immunomodulatory effect occurs within fetal serum concentrations, suggesting a role in fetal immune regulation.

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    Area of Science:

    • Immunology
    • Biochemistry

    Background:

    • Alpha-fetoprotein (AFP) is a protein crucial during fetal development.
    • Its precise immunomodulatory functions, especially in relation to T lymphocytes, require further elucidation.

    Purpose of the Study:

    • To investigate the impact of varying alpha-fetoprotein concentrations on human peripheral blood lymphocyte populations and functions.
    • To determine the potential immunoregulatory role of AFP in the context of T lymphocyte activity and proliferation.

    Main Methods:

    • Incubation of peripheral blood lymphocytes with diverse concentrations of alpha-fetoprotein.
    • Enumeration of total T lymphocytes, "active" T lymphocytes, and B lymphocytes.
    • Assessment of lymphocyte proliferative responses to phytohemagglutinin.

    Main Results:

    • No significant changes were observed in total T or B lymphocyte proportions.
    • A dose-dependent increase in the proportion of "active" T lymphocytes was noted.
    • A marked depression in the phytohemagglutinin-induced proliferative response of human lymphocytes was observed.

    Conclusions:

    • Alpha-fetoprotein modulates T lymphocyte populations and function.
    • The observed effects, particularly the increase in "active" T cells and inhibition of proliferation, occur at concentrations found in fetal serum.
    • These findings suggest a significant immunoregulatory role for alpha-fetoprotein during fetal development.

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