Naxitamab

Specification

• Cat#: THA-0143
• Product Name: Naxitamab
• Description: Naxitamab is a GD2-targeted IgG1 monoclonal antibody for the treatment of high-risk relapsed/refractory neuroblastoma of the bone or bone marrow.
• Sequences: Not Available
• Molecular Weight: 144000.0 Da (non-glycosylated)
• Introduction: Naxitamab (humanized 3F8, hu3F8) is an IgG1 monoclonal antibody directed against the oncofetal differentiation antigen GD2 disialoganglioside. Normally expressed during fetal development and in mature neurons, pain fibers, and skin cells, GD2 constitutes a highly efficient target in the treatment of neuroblastoma-it is widely expressed across and within neuroblastomas (and other neuroectodermal tumors), and is rarely subject to antigen loss. The first anti-GD2-monoclonal IgG antibody to be approved by the FDA for the treatment of neuroblastoma was dinutuximab under the brand name Unituxin in 2015. One stark disadvantage of this therapy is the requirement for concurrent use of granulocyte-macrophage colony-stimulating factor (GM-CSF), interleukin-2 (IL-2), and 13-cis-retinoic acid (RA). Naxitamab-gqgk (Danyelza) was granted accelerated approval by the FDA in November 2020 for the treatment of high-risk relapsed/refractory neuroblastoma of the bone or bone marrow. This approval requires naxitamab to be co-administered only with GM-CSF, a factor known to enhance the granulocyte-mediated antibody-dependent cytotoxicity of anti-GD2 therapies, making the administration of naxitamab therapy markedly simpler than that of its predecessor.
• Purity: >99% by SDS-Page and HPLC analysis
• Formula: Not Available
• Appearance: Liquid

Pharmaceutical Information

• Pharmacodynamics: In targeting cell surface glycoproteins (GD2) that occur on the surface of neuroendocrine tumors, naxitamab directs the immune system towards these cancerous cells and induces the activation of both complement-dependent and antibody-dependent cytotoxicity. Naxitamab can cause serious infusion reactions-including hypotension, hypoxia, anaphylaxis, and cardiac arrest-that necessitate careful monitoring during therapy. All patients should be pre-medicated with intravenous corticosteroids (e.g. methylprednisolone) as well as an antihistamine, H2 receptor antagonist, acetaminophen, and an antiemetic prior to therapy to mitigate the risk and severity of infusion-related reactions. Naxitamab may also cause severe neurotoxicity, including significant neuropathic pain, transverse myelitis, reversible posterior leukoencephalopathy syndrome (RPLS), and ocular toxicities. Pain management should be implemented prior to and during therapy-patients should take a 12-day course of neuropathic pain prophylaxis (e.g. gabapentin) starting 4 days prior to infusion, and should receive oral opioids 45-60 minutes prior to infusion and intravenous opioids and/or ketamine as needed thereafter.
• Targets: GD2 disialoganglioside