Abstract

The T-cell receptor (TCR) signalling machinery is central in determining the response of a T cell (establishing immunity or tolerance) following exposure to antigen. This process is made difficult by the narrow margin of self and non-self discrimination, and by the complexity of the genetic programmes that are induced for each outcome. Recent studies have identified novel negative feedback mechanisms that are rapidly induced by TCR engagement and that have key roles in the regulation of signal triggering and propagation. In vitro and in vivo data suggest that they are important in determining ligand discrimination by the TCR and in regulating signal output in response to antigen.

Author affiliations

1. Sir William Dunn School of Pathology, University of Oxford, South Parks Road, Oxford OX1 3RE, UK.
2. Institut Pasteur, Lymphocyte Cell Biology Unit, Centre National de la Reserche Scientifique (CNRS) URA1961, F-75, 015, Paris, France.
3. Institut Pasteur, Cytokine Signalling Unit, CNRS URA1961, F-75, 015, Paris, France.

Correspondence to: Oreste Acuto¹ Email: oreste.acuto@path.ox.ac.uk

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