Standardized ex vivo platforms for the antigen-specific expansion of CD4+ T cell populations
The invention relates to methods, peptides, nucleic acids and cells for use in isolating and expanding human T cell populations in an antigen-specific manner for immunodiagnostic or therapeutic purposes. The invention also relates to professional antigen presenting cells derived from pluripotent human stem cells, and to customizable antigen presentation by the antigen presenting cells.
1. A dendritic cell comprising a single peptide antigen presented on the surface of said dendritic cell, wherein said single peptide antigen is attached to a human leukocyte antigen-antigen D related alpha (HLA-DRA) alpha chain peptide through a peptide linker, wherein said HLA-DRA alpha chain peptide comprises a transmembrane domain and a cytoplasmic domain of HLA-DRA alpha chain peptide and wherein said single peptide antigen is not covalently linked with a major histocompatibility complex (MHC) beta chain peptide.