Bifunctional antibody designs and methods for the selective killing of cell populations.

摘要

A bifunctional heterodimeric antibody conjugate comprising (a) an anti-target cell antibody component joined to (b) an anti-lymphocyte antibody component wherein the anti-lymphocyte antibody component is specific for activated lymphocytes. A bifunctional antibody/cell surface-binding molecule conjugate comprising (a) a molecular component other than an antibody, capable of binding to target cell surface molecules and (b) an anti-lymphocyte antibody component wherein the anti-lymphocyte antibody component is specific for activated lymphocytes. A bifunctional hybrid antibody comprising (a) an anti-target cell binding site component and (b) an anti-lymphocyte binding site component, wherein the anti-lymphocyte binding site component is specific for activated lymphocytes. A method for selectively destroying target cell populations comprising: (1) binding the component (a) of one or more of the above described bifunctional antibody constructs to target cells; (2) activating lymphocytes; and (3) binding the activated lymphocytes to the component (b) of the bifunctional antibody construct; wherein said steps (1), (2) and (3) can be conducted simultaneously or in any order, provided that step (2) is always conducted simultaneously with or prior to step (3).