Biological significance of alloreactivity: T cells stimulated by Sendai virus-coated syngeneic cells specifically lyse allogeneic target cells.

Abstract

In vitro stimulation of spleen cells from mice immune to Sendai virus results in the generation of effector cells that lyse unmodified allogeneic target cells in addition to syngeneic cells modified by virus. These cells are immunologically specific because their lysis may be blocked by cold targets syngeneic to the stimulator or the responder. The development of alloreactivity may be explained by the crossreactivity between modified self major histocompatibility complex antigens and alloantigens. Exposure to autologous major histocompatibility complex antigens modified by foreign antigens in the evironment may result in the expansion of the pool of T [thymus-derived] cells that respond to alloantigens sharing crossreactive determinants.