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Function of autoreactive T cells in immune responses.
A Finnegan1, B W Needleman, R J Hodes
1Department of Internal Medicine, Rush Presbyterian St. Luke's Medical School, Chicago, IL 60612.
Immunological Reviews
|August 1, 1990
Summary
Antigen priming activates T cells, influencing both specific and autoreactive responses. Regulatory mechanisms, including T-suppressor cells, down-regulate B-cell antibody production, maintaining immune balance.
Area of Science:
- Immunology
- Cellular Biology
Background:
- Autoreactive T cells play a role in immune responses.
- Antigen priming is crucial for T cell activation.
Purpose of the Study:
- To model the activation and regulation of autoreactive T cells by antigen.
- To understand the interplay between antigen-specific and autoreactive T cells in B cell stimulation.
- To elucidate the role of regulatory mechanisms in controlling antibody responses.
Main Methods:
- Construction of a conceptual model (Fig. 2) illustrating T cell activation and regulation.
- Analysis of antigen's role in T cell priming and B cell stimulation.
- Investigation of T-suppressor cell function in immune regulation.
Main Results:
- Antigen priming is essential for both antigen-specific and autoreactive T cells.
- Activated T cells stimulate B cells to produce antibodies.
- Autoreactive T cells can enhance B cell responses when antigen-specific T-cell help is limited.
- Antigen activates regulatory mechanisms that down-regulate B cell antibody responses.
- T-suppressor cells exhibit antigen-specific activation but can have non-specific effector functions.
Conclusions:
- A model is proposed for antigen-driven T cell activation and immune regulation.
- Autoreactive T cells and antigen-specific T cells may cooperate in immune responses.
- Regulatory mechanisms involving T-suppressor cells are critical for preventing excessive B cell activation and antibody production.