It is now accepted that T cell activation by an antigen-presenting cell
requires the organization of a supramolecular structure - the immune
synapse. This structure, with different types of molecules spatially
segregated, is involved in the delivery of quantitative and qualitative
signals critical for T cell activation, and therefore in controlling the
nature of the immune response. This volume discusses the progress in
manipulating components of the immune synapse as a strategy to regulate
the immune response in immune pathology, such as transplantation,
autoimmunity and allergy. Donnadieu reviews the current knowledge on the
molecular composition and organization of the immune synapse and how the
formation of this structure can be modulated by chemokines. It is also
known that the immune synapse formation is critical for the activation
of naive T cells, as well as their functional polarization. The second
chapter discusses the conversion of naive T cells into regulatory T
cells (Treg) when components of the immune synapse are manipulated in
such a way that the T cells receive suboptimal activation signals.