Abstract: The present invention relates to a medicament for use in a method of extending a cellular cytotoxic immune response against an antigen-comprising protein, the method comprising the step of: i) administering to a patient having T cells activated against an antigen a peptide-loaded major histocompatibility complex class I (MHC-I) presenting cell and an adjuvant which supports a Th-1-mediated response, wherein the peptide is derived from the antigen-comprising protein, thereby re-activating the activated T cell, wherein the peptide-loaded major histocompatibility complex class I (MHC-I) presenting cell of step i) is administered in a time frame of from 0 h to 14 days after the T cells were activated against an antigen.

Abstract: The present invention relates generally to binding agents useful in the selective depletion of T cells in vivo. More specifically, the invention relates to ICOS-binding agents which once bound to ICOS expressed on the surface of cells, in particular ICOS-bearing activated T cells, result in the in vivo depletion of cells to which they are bound. Methods of treating T cell related diseases using said ICOS-binding agents, and pharmaceutical compositions comprising said ICOS-binding agents, a method of identifying an ICOS-binding agent, and monoclonal anti-ICOS antibodies capable of eliminating cells in vivo which express ICOS on their surface are also provided.