| abstract |
CD59, a 18 - 20 kDa glycosyl phosphatidylinositol (GPI)-anchored membrane glycoprotein, is expressed in several normal and cancer tissues. A monoclonal antibody against CD59 from the hybridoma AR36A36.11.1, deposited with the International Depository Authority of Canada (IDAC) as accession number 280104-02, was previously shown to be a cancerous disease modifying antibody (CDMAB), preventing tumour growth and reducing tumour burden in several cancer models including prostate and breast cancer by cytotoxicity. The variable regions of this monoclonal antibody are now isolated and sequenced, complementarity determining regions (CDRs) determined, and chimeric and humanized antibodies generated that have the same anti-CD59 binding activity and anti-cancer activity as the parent monoclonal antibody. The monoclonal, chimeric and humanized antibodies can be conjugated to toxins, enzymes, radioactive compounds, cytokines, interferons, target or reporter moieties and hematogenous cells to treat cancer. These antibodies are also used in binding assays to determine CD59 expression on cells. |