Bispecific heteroantibodies with dual effector functions

Details Bispecific heteroantibodies with dual effector functions Bispecific heteroantibodies with dual effector functions

A - Human Necessities

61

K

A61K 35/14 (2006.01) A61K 39/395 (2006.01) C07K 16/28 (2006.01) C07K 16/30 (2006.01) C07K 16/46 (2006.01) C12N 5/08 (2006.01)

Patent

CA 2069960

Bispecific molecules which react both with the high-affinity Fc.gamma. receptor of human effector cells and with a target cell surface antigen are disclosed. Binding of the molecules to the Fc receptors found on effector cells is not blocked by human immunoglobulin G. The molecules are useful for targeting human effector cells (e. g. macrophages) against cells bearing the target antigen. For this purpose, bispecific molecules can be constructed containing the binding region derived from an anti-Fc.gamma. receptor antibody and the binding region derived from an antibody specific for the target antigen. Targeted effector cells can be used to destroy cells bearing the target cell surface antigen by cell-mediated antibody dependent cytolysis and by complement-fixation.

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