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Interferon: a cytotoxic T lymphocyte differentiation signal
European Journal of Immunology
|July 1, 1986
Summary
Interferons can signal cytotoxic T lymphocyte differentiation, enabling non-lytic T cells to kill targets. This crucial immune function can be blocked by specific antibodies targeting cell surface molecules.
Area of Science:
- Immunology
- Cell Biology
Background:
- Human T cell clones can proliferate but lack cytotoxic function.
- Cytotoxic T lymphocyte (CTL) differentiation is crucial for adaptive immunity.
Purpose of the Study:
- To investigate the role of interferons in inducing cytotoxic function in T cells.
- To identify signals involved in cytotoxic T lymphocyte differentiation.
Main Methods:
- Culturing human T cell clones.
- Stimulating T cells with specific antigens and lectins.
- Adding interferon-alpha or interferon-gamma.
- Blocking with monoclonal antibody LeoA1.
Main Results:
- Interferon-alpha and interferon-gamma induced specific lytic function in non-cytotoxic T cell clones.
- This interferon-induced cytotoxic function was blocked by monoclonal antibody LeoA1.
- LeoA1 targets a 70-kDa cell surface structure involved in CTL differentiation.
Conclusions:
- Interferons act as differentiation signals for cytotoxic T lymphocytes.
- A 70-kDa cell surface molecule, recognized by LeoA1, is essential for interferon-mediated CTL differentiation.