This recombinant monoclonal antibody is designed as a research-grade biosimilar to cabiralizumab, targeting the colony-stimulating factor 1 receptor (CSF1R). CSF1R is a cell surface tyrosine kinase receptor that plays a crucial role in the survival, proliferation, and differentiation of macrophages and monocytes. Upon binding its ligands CSF1 and IL-34, CSF1R activates signaling pathways that regulate the tumor microenvironment by controlling tumor-associated macrophages (TAMs). Elevated CSF1R expression and increased TAM infiltration are associated with poor prognosis in various solid tumors, including pancreatic cancer, glioblastoma, and diffuse-type tenosynovial giant cell tumor.
Cabiralizumab is a humanized IgG4 monoclonal antibody that blocks CSF1R signaling by preventing ligand binding, thereby depleting immunosuppressive TAMs within the tumor microenvironment. This biosimilar antibody serves as a valuable research tool for investigating CSF1R-mediated immune regulation, studying macrophage biology in cancer models, and exploring combination immunotherapy strategies. It enables researchers to examine the therapeutic potential of CSF1R inhibition across various disease contexts.
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