Anti-Human EGFR (Necitumumab)

Human EGFR/ErbB1

This biosimilar antibody is aseptically packaged and formulated in 0.01 M phosphate buffered saline (150 mM NaCl) PBS pH 7.2 - 7.4 with no carrier protein, potassium, calcium or preservatives added. Due to inherent biochemical properties of antibodies, certain products may be prone to precipitation over time. Precipitation may be removed by aseptic centrifugation and/or filtration.

Liquid

Recombinant biosimilar antibodies are manufactured in an animal free facility using only in vitro protein free cell culture techniques and are purified by a multi-step process including the use of protein A or G to assure extremely low levels of endotoxins, leachable protein A or aggregates.

To protect mouse colonies from infection by pathogens and to assure that experimental preclinical data is not affected by such pathogens, all of Leinco’s recombinant biosimilar antibodies are tested and guaranteed to be negative for all pathogens in the IDEXX IMPACT I Mouse Profile.

Functional grade biosimilar antibodies may be stored sterile as received at 2-8°C for up to one month. For longer term storage, aseptically aliquot in working volumes without diluting and store at -80°C. Avoid Repeated Freeze Thaw Cycles.

Research Use Only (RUO). Non-Therapeutic.

2-8°C Wet Ice

This non-therapeutic biosimilar antibody uses the same variable region sequence as the therapeutic antibody Necitumumab. This product is for research use only. Necitumumab activity is directed against human EGFR.

Epidermal growth factor receptor (EGFR, also known as ErbB1 or HER-1) belongs to the receptor tyrosine kinase superfamily and is a transmembrane glycoprotein that activates various signaling pathways fundamental to cellular proliferation, differentiation, and survival^{1, 2}. EGFR plays important roles during embryogenesis, organogenesis, and in the growth, differentiation, maintenance, and repair of adult tissues², including autophagy³. EGFR is also a host factor that facilitates viral entry for hepatitis B⁴, hepatitis C⁵, and gastroenteritis⁶ and plays a role in SARS-CoV-2 infection^{7, 8, 9}. Dysregulation, somatic mutation, and/or altered signaling of EGFR are associated with disease (Parkinson’s², Alzheimer’s^1,2, and amyotrophic lateral sclerosis²) and various cancers (lung, glioblastoma, brain, breast, colorectal, ovarian)³. Additionally, in cancer, aberrant activation of EGFR is associated with increased cell proliferation, invasion, metastasis, angiogenesis, and decreased apoptosis¹⁰. As such, EGFR is the target of multiple cancer therapies, including monoclonal humanized antibodies, such as necitumumab, as well as selective small molecule inhibitors.

Necitumumab inhibits EGFR-dependent tumor cell proliferation and metastasis¹¹ by acting as an EGFR antagonist that binds specifically and with high affinity to human EGFR, thereby blocking ligand binding and neutralizing ligand-induced EGFR phosphorylation and downstream signaling pathways^{10, 11, 12}. Anti-tumor activity has been demonstrated in vitro and in vivo ¹⁰, and necitumumab is FDA approved for treatment of adult patients with locally advanced or metastatic EGFR-expressing squamous non-small cell lung cancer¹¹. In vitro studies have shown that necitumumab induces internationalization and degradation of EGFR, leading to antibody-dependent cellular cytotoxicity in EGFR-expressing cells^{10, 11}. Necitumumab was generated from the Dyax Corp proprietary phage display library by ImClone Systems, a wholly owned subsidiary of Eli Lilly¹⁰.

EGFR is overexpressed on the cell surfaces of various tumor cell types and is also found in the plasma membranes, cytoplasm, and cell junctions of many healthy tissues, including those associated with the Skin – Epidermis development cluster of The Human Protein Atlas. EGFR is also found in the blood secretome.

Epidermal growth factor receptor

1. Jayaswamy PK, Vijaykrishnaraj M, Patil P, et al. Ageing Res Rev. 83:101791. 2023.
2. Romano R, Bucci C. Cells. 9(8):1887. 2020.
3. Sigismund S, Avanzato D, Lanzetti L. Mol Oncol. 12(1):3-20. 2018.
4. Iwamoto M, Saso W, Sugiyama R, et al. Proc Natl Acad Sci U S A. 116(17):8487-8492. 2019.
5. Lupberger J, Zeisel MB, Xiao F, et al. Nat Med. 17(5):589-595. 2011.
6. Hu W, Zhang S, Shen Y, et al. Virology. 521:33-43. 2018.
7. Klann K, Bojkova D, Tascher G, et al. Mol Cell. 80(1):164-174.e4. 2020.
8. Xu G, Li Y, Zhang S, et al. Cell Res. 31(12):1230-1243. 2021.
9. Wang S, Qiu Z, Hou Y, et al. Cell Res. 31(2):126-140. 2021.
10. Garnock-Jones KP. Drugs. 76(2):283-289. 2016.
11. Fala L. Am Health Drug Benefits. 9(Spec Feature):119-122. 2016.
12. https://www.cancer.gov/publications/dictionaries/cancer-drug/def/necitumumab?redirect=true