Method of isolating antigen-specific T cells employing artificial antigen presenting cells

摘要

The present invention concerns artificial antigen presenting cells (aAPCs) and methods of making and using the same, for example, to isolate, identify, and expand T cell populations specifically reactive against a disease-associated antigenic peptide, as well as to modulate responses of antigen-specific T cells both in vivo, ex vivo, and in vitro. Accordingly, the aAPCs of the invention can be used to treat conditions that would benefit from modulation of a T cell response, for example, autoimmune disorders, allergies, cancers, viral infections, and graft rejection. In certain preferred embodiments, the aAPCs are liposomes comprised of MHC:peptide complexes and accessory molecules. Other molecules, such as co-stimulatory molecules and adhesion molecules, can also be included in the compositions of the invention. In other embodiments, the aAPCs are comprised of a scaffold to which a plurality of MHC:peptide complexes and accessory molecules (as well as other molecules) can be attached at high density.