| Code | CSB-RA007763MB1HU |
| Size | US$9799 |
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This recombinant monoclonal antibody is a research-grade biosimilar of trastuzumab (marketed as Herceptin), targeting ERBB2, also known as HER2 or human epidermal growth factor receptor 2. ERBB2 is a transmembrane receptor tyrosine kinase belonging to the EGFR family that lacks a direct ligand but functions as the preferred heterodimerization partner for other ERBB receptors. Upon dimerization, ERBB2 activates downstream PI3K/AKT and MAPK signaling pathways, promoting cell proliferation, survival, and resistance to apoptosis. ERBB2 is amplified or overexpressed in approximately 20-25% of breast cancers and is also found in gastric, ovarian, and lung cancers, where it correlates with aggressive disease behavior and poor prognosis. Trastuzumab is a landmark FDA-approved humanized IgG1 monoclonal antibody that binds to the extracellular domain IV of ERBB2, inhibiting receptor dimerization and downstream signaling while inducing antibody-dependent cellular cytotoxicity. This biosimilar provides researchers with a valuable tool for investigating ERBB2 biology, receptor dimerization mechanisms, and targeted therapy resistance in preclinical cancer models. It supports studies exploring ERBB2-mediated oncogenic pathways and combination therapeutic strategies.
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