Lenzilumab

**Semantic type:** Amino Acid, Peptide, or Protein|Immunologic Factor|Pharmacologic Substance

**Definition:** A recombinant monoclonal antibody against the cytokine granulocyte macrophage colony-stimulating factor (GM-CSF), with potential immunomodulating activity. Upon administration, lenzilumab binds to and neutralizes GM-CSF. This prevents GM-CSF binding to the GM-CSF receptor, which is a heterodimeric protein expressed on myeloid progenitor cells, and prevents GM-CSF-mediated signaling. This may induce apoptosis in and inhibit proliferation of cancer cells that overproduce GM-CSF. GM-CSF plays a key role in the differentiation and proliferation of monocytes, macrophages and granulocytes; elevated levels of GM-CSF are associated with certain autoimmune diseases, inflammatory diseases, and cancers.

**Synonyms:** - Immunoglobulin G1-kappa, Anti-(Homo sapiens CSF2 (Colony Stimulating Factor 2 (Granulocyte-Macrophage), Granulocyte Macrophage Colony Stimulating Factor, GM-CSF)), Homo sapiens Monoclonal Antibody - KB 003 - KB003 - LENZILUMAB