4-1BB/TNFRSF9/CD137 Antibody (4B4-1) - Low Endotoxin, Azide and BSA Free

Flow Cytometry: 4-1BB/TNFRSF9/CD137 Antibody (4B4-1) - Low Endotoxin, Azide and BSA Free [NBP3-09103] - Separation of cells stained using anti-humam CD137 (4B4-1) purified antibody (low endotoxin, concentration in sample 4 ug/ml, GAM APC, red-filled) from cells unstained by primary antibody (GAM APC, black-dashed) in flow cytometry analysis (surface staining) of human PHA stimulated peripheral blood mononuclear cell suspension.

Flow Cytometry: 4-1BB/TNFRSF9/CD137 Antibody (4B4-1) - Low Endotoxin, Azide and BSA Free [NBP3-09103] - Surface staining pattern of human PHA stimulated peripheral blood mononuclear cell suspension stained using anti-humam CD137 (4B4-1) purified antibody (low endotoxin, concentration in sample 4 ug/ml) GAM APC.

• Reactivity: Hu, Pm
• Applications: ELISA, Flow, Func, IP
• Clone: 4B4-1
• Clonality: Monoclonal
• Host: Mouse
• Conjugate: Unconjugated
• Format: Low Endotoxin, Azide and BSA Free
• Concentration: 1 mg/ml

4-1BB/TNFRSF9/CD137 Antibody (4B4-1) - Low Endotoxin, Azide and BSA Free Summary

• Description: Novus Biologicals Mouse 4-1BB/TNFRSF9/CD137 Antibody (4B4-1) - Low Endotoxin, Azide and BSA Free (NBP3-09103) is a monoclonal antibody validated for use in ELISA, Flow and IP. All Novus Biologicals antibodies are covered by our 100% guarantee.
• Additional Information: Clone 4B4-1 was used by HLDA to establish CD designation.
• Immunogen: Recombinant human 4-1BB/TNFRSF9/CD137 ectodomain
• Specificity: The mouse monoclonal antibody 4B4-1 recognizes an extracellular conformational epitope on CD137, an approximately 40 kDa type I transmembrane protein of the TNFR family expressed mainly on activated T cells.
• Isotype: IgG1 Kappa
• Clonality: Monoclonal
• Host: Mouse
• Gene: TNFRSF9
• Purity: Protein A purified
• Endotoxin Note: Endotoxin level is less than 0.01 EU/ug of the protein, as determined by the LAL test.

Applications/Dilutions

• Dilutions:
  • ELISA
  • Flow Cytometry 1-4 ug/ml
  • Functional
  • Immunoprecipitation

Packaging, Storage & Formulations

• Storage: Store at 4C. Do not freeze.
• Buffer: Phosphate buffered saline (PBS), pH 7.4
• Preservative: No Preservative
• Concentration: 1 mg/ml
• Purity: Protein A purified

Alternate Names for 4-1BB/TNFRSF9/CD137 Antibody (4B4-1) - Low Endotoxin, Azide and BSA Free

• 4-1BB ligand receptor
• 41BB
• 4-1BB
• CD137 antigen
• CD137
• CD137MGC2172
• CDw137
• FLJ43501
• ILA
• ILAhomolog of mouse 4-1BB
• induced by lymphocyte activation (ILA)
• interleukin-activated receptor, homolog of mouse Ly63
• receptor protein 4-1BB
• T cell antigen ILA
• T-cell antigen 4-1BB homolog
• T-cell antigen ILA
• TNFRSF9
• tumor necrosis factor receptor superfamily member 9
• tumor necrosis factor receptor superfamily, member 9

Background

4-1BB, also called CD137 and tumor necrosis factor receptor superfamily member 9 (TNFRSF9), is a type I surface glycoprotein expressed on activated T cell and natural killer (NK) cells (1,2). Human 4-1BB protein is 255 amino acids (aa) in length with a theoretical molecular weight of 28 kDa. It contains an extracellular domain, a helical transmembrane domain, and a cytoplasmic/intracellular domain (3). 4-1BB/TNFRSF9/CD137 is a costimulatory receptor that binds the ligand 4-1BBL/CD137L which is primarily expressed on antigen presenting cells (APCs) such as dendritic cells (DCs), macrophages, and B cells (1,2,4,5). The 4-1BB receptor-ligand interaction results in recruitment of TNFR-associated factor (TRAF) family adaptor proteins to 4-1BB's cytoplasmic domain (1,2,4,5). TRAF1, TRAF2, and TRAF3 are found in various homodimer and/or heterodimer configurations. Their recruitment to 4-1BB/CD137 initiates signalosome formation as well as activation of the nuclear factor-kappa B (NF-kappaB) and mitogen-activated protein kinase (MAPK) signaling cascade (1,4,5). 4-1BB/TNFRSF9/CD137 stimulation leads to increased cellular cytotoxic activity and pro-inflammatory cytokine production (1,2,4). Given its role in immune cell activation, 4-1BB has become a promising target for cancer immunotherapy (1,2,4). Current approaches to target 4-1BB include agonistic monoclonal and bispecific anti-4-1BB antibodies and well as utilizing the cytoplasmic domain of 4-1BB in generating chimeric antigen receptors (CARs) (1,2,4). 4-1BB agonists in clinical trials include Urelumab and Utolimumab. Utolimumab also has ligand blocking properties whereas Urelumab does not (1,2,4). Anti-4-1BB monoclonal antibodies are being tested as monotherapy as well as combination therapy with either other immunostimulatory monoclonal antibodies or with checkpoint blockade antibodies like anti-PD-1 (1,2,4).

References

1. Etxeberria, I., Glez-Vaz, J., Teijeira, A., & Melero, I. (2020). New emerging targets in cancer immunotherapy: CD137/4-1BB costimulatory axis. ESMO open, 4(Suppl 3), e000733. https://doi.org/10.1136/esmoopen-2020-000733

2. Chester, C., Sanmamed, M. F., Wang, J., & Melero, I. (2018). Immunotherapy targeting 4-1BB: mechanistic rationale, clinical results, and future strategies. Blood, 131(1), 49-57. https://doi.org/10.1182/blood-2017-06-741041

3. Uniport (Q07011)

4. Chester, C., Ambulkar, S., & Kohrt, H. E. (2016). 4-1BB agonism: adding the accelerator to cancer immunotherapy. Cancer Immunology, Immunotherapy: CII, 65(10), 1243-1248. https://doi.org/10.1007/s00262-016-1829-2

5. Zapata, J. M., Perez-Chacon, G., Carr-Baena, P., Martinez-Forero, I., Azpilikueta, A., Otano, I., & Melero, I. (2018). CD137 (4-1BB) signalosome: complexity is a matter of TRAFs. Frontiers in Immunology, 9, 2618. https://doi.org/10.3389/fimmu.2018.02618

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

Bioinformatics

• Gene Symbol: TNFRSF9