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IgE class-specific suppressor T cells and factors in humans
Journal of Immunology (Baltimore, Md. : 1950)
|December 1, 1983
Summary
Researchers identified a human IgE binding factor that selectively suppresses immunoglobulin E (IgE) antibody responses. This factor, derived from T cells, offers a targeted approach to modulating IgE production in vitro.
Area of Science:
- Immunology
- Allergy Research
Background:
- Established an in vitro system to study immunoglobulin E (IgE) production using human peripheral blood lymphocytes (PBL).
- Polyclonal stimulation with PWM and Cowan I induced IgM, IgG, and IgE producing cells.
Purpose of the Study:
- To investigate the suppressive effects of T cells from tuberculosis patients on polyclonal IgE responses.
- To identify and characterize factors responsible for IgE-specific suppression.
Main Methods:
- Incubation of T cells from tuberculosis patients with PPD and IgE.
- Assessing IgE and IgG production using reverse plaque assays.
- Analyzing the suppressive activity of activated T cells and their culture supernatant.
- Utilizing an IgE column for specific absorption and elution of suppressive factors.
Main Results:
- Activated T cells and their supernatant significantly suppressed polyclonal IgE production but not IgG production.
- The suppressive activity in the supernatant was specific to IgE and could be isolated.
- Demonstrated the presence of human IgE binding factor(s) with selective IgE suppressive effects.
Conclusions:
- Human T cells can produce factors that selectively inhibit IgE antibody responses.
- Identified a novel IgE binding factor with potential therapeutic implications for IgE-mediated allergic diseases.