Zanidatamab

• CAT Number: I042217
• CAS Number: 2169946-15-8
• Purity: ≥95%

Zanidatamab (ZW25) is a humanised, bispecific monoclonal antibody targeting 2 distinct HER2 epitopes (ECD2 and ECD4). Zanidatamab has anti-tumour activity[1].
Zanidatamab (ZW25) has low nM binding affinity (0.9-16 nM) to recombinant HER2 and to cultured cancer cells with a range of HER2 expression[1].
Zanidatamab inhibits the growth of human cancer cell lines with a wide range of HER2 expression (5-54% inhibition depending on the cell line), and inhibits ligand-mediated tumor cell proliferation[1].
Zanidatamab elicits concentration-dependent ADCC at nM potency (0.05-64 nM) with maximal lysis up to 52% on TNBC cell lines expressing HER2 and exhibits synergy and additivity with multiple chemotherapeutic agents including platins, taxanes, microtubule inhibitors, and DNA synthesis inhibitors in various HER2 expressing tumor cell lines[1].
Zanidatamab (ZW25) induces significant tumor regressions, exhibiting 307% tumor growth inhibition relative to hIgG control and a 70% complete regression rate[1].

Reference

[1]. Weisser N, et, al. Preclinical development of a novel biparatopic HER2 antibody with activity in low to high HER2 expressing cancers. Cancer Res. 2017:77 (13).