FcαR & HER2

HER2 is a protein encoded by the ERBB2 gene, and it is a member of the epidermal growth factor receptor (EGFR) family. It plays a crucial role in cell growth and differentiation. Overexpression or amplification of the HER2 gene is associated with several aggressive forms of cancer, most notably breast cancer. This overexpression leads to increased cell proliferation and tumor growth, making HER2 a significant target for cancer diagnostics and therapeutics. Monoclonal antibodies and small molecule inhibitors that target HER2 have significantly improved outcomes for patients with HER2-positive cancers.

This gene is a member of the immunoglobulin gene superfamily and encodes a receptor for the Fc region of IgA. The receptor is a transmembrane glycoprotein present on the surface of myeloid lineage cells such as neutrophils, monocytes, macrophages, and eosinophils, where it mediates immunologic responses to pathogens. It interacts with IgA-opsonized targets and triggers several immunologic defense processes, including phagocytosis, antibody-dependent cell-mediated cytotoxicity, and stimulation of the release of inflammatory mediators. Multiple alternatively spliced transcript variants encoding different isoforms have been described for this gene.