Pharmaceuticals and assays using enzyme subunits

摘要

A method of releasing an agent (e.g. a chemotherapeutic) under predetermined conditions comprising the steps of protecting the agent within a lipid structure (e.g. a liposome), causing lipase activity to be constituted by combining two or more components (e.g. recombinant N- or C-terminal Clostridium perfringens alpha-toxin fragments), one of these components being conjugated to a targeting molecule (e.g. an antibody) which binds to a target (e.g. a tumour antigen) under the predetermined conditions. The lipid structure is then exposed to the constituted lipase activity such as to release the agent. Also disclosed are materials and kits for use in the method.