MUTATED MHC MOLECULES FOR USE IN IMMUNE SUPPRESSION

摘要

The invention provides immunocomplex comprising MHC molecules or functional fragments thereof which are modified so as to prevent binding to co-receptors e.g. CD8 or CD4. The inventors have determined that inability of the MHC complex to bind co-receptor leads to death of the T-cells without delivery of an activation/proliferation signal. By associating the immunocomplex with a specific peptide antigen it is possible to selectively suppress the immune system of a host, i.e. to help prevent tissue rejection or treat autoimmune diseases. For a more universal suppression of the immune system, it is possible to administer the modified MHC complex or fragment/component thereof in the absence of peptide antigen. For example, modified beta M complex can be administered.