Anti-CD20 (Obinutuzumab biosimilar - IgG1fut isotype)
Product | Unit size | Cat. code | Docs. | Qty. | Price | |
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Anti-hCD20-Ga-hIgG1fut Human CD20 (Obinutuzumab) antibody - Human IgG1, non-fucosylated |
Show product |
100 µg 3 x 100 µg |
hcd20ga-mab13
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Non-fucosylated human IgG1 monoclonal antibody (mAb) against human CD20
Anti-hCD20-Ga-hIgG1fut is the biosimilar of the clinical antibody obinutuzumab. Anti-hCD20-Ga-hIgG1fut features the constant region (Fc) of a non-fucosylated (fut), human IgG1 isotype and the variable region of obinutuzumab. Obinutuzumab (formerly named afutuzumab or GA101) targets the human CD20 antigen found on the surface of normal and malignant B lymphocytes.
Obinutuzumab is a type II (second generation) non-fucosylated, fully humanized IgG1 monoclonal antibody with improved therapeutic efficacy compared with previously developed type I (first generation) anti-hCD20 mAbs, such as Rituximab and Ofatumumab. Obinutuzumab has been approved by the FDA to treat chronic lymphocytic leukemia [1-3].
The absence of fucose residues from the Fc N-glycans results in dramatic enhancement of antibody-dependent cellular cytotoxicity (ADCC) without any detectable change in complement-dependent cytotoxicity (CDC) or antigen-binding capability [4].
InvivoGen’s Anti-hCD20-Ga-hIgG1fut is generated by recombinant DNA technology, produced in Chinese hamster ovary (CHO) cells deficient for fucosylation, and purified by affinity chromatography (protein G).
More isotypes of this antibody are available and can be used for comparison of biological activities such as ADCC (see below or in the 'upon request' section).
InvivoGen also provides type I anti-hCD20 mAbs featuring the variable regions of Rituximab or Ofatumumab, with either native or engineered Fc region.
Read our review on Antibody Isotypes
References:
1. Gagez AL. & Cartron G., 2014. Obinutuzumab: a new class of anti-CD20 monoclonal antibody. Curr Opin Oncol. 26(5):484-91.
2. Smolej L., 2014. Targeted treatment for chronic lymphocytic leukemia: clinical potential of obinutuzumab. Pharmgenomics Pers Med. 8:1-7.
3. Winiarska M. et al., 2011. Molecular mechanisms of the antitumor effects of anti-CD20 antibodies. Front Biosci (Landmark Ed). 16:277-306. 4. Mizushima T., 2011. Structural basis for improved efficacy of therapeutic antibodies on defucosylation of their Fc glycans. Genes Cells. 16(11): 1071–1080.
Specifications
Target: Human CD20
Clonality: Monoclonal antibody
Clone: Obinutuzumab (Anti-hCD20-Ga-hIgG1fut, kappa)
Isotype: Human IgG1fut, kappa
Control: Human IgG1fut
Source: CHO cells (fucosylation-deficient)
Formulation: 0.2 µm filtered solution in 68 mM sodium phosphate buffer (pH 7.4) with 91 mM glycine, 5% w/v saccharose, and stabilizing agents
Purity: Purified by affinity chromatography with protein G
Tested application: Flow cytometry
Quality control:
- Binding of Anti-hCD20-Ga-hIgG1fut to human CD20 has been tested using flow cytometry.
- The complete sequence of this antibody has been verified.
- The absence of bacterial contamination (e.g. lipoproteins and endotoxins) has been confirmed using HEK-Blue™ TLR2 and HEK-Blue™ TLR4 cells.
Contents
Anti-hCD20-Ga-hIgG1fut purified monoclonal antibody is provided azide-free and lyophilized. It is available in two quantities:
- hcd20ga-mab13: 100 µg
- hcd20ga-mab13-03: 3 x 100 µg
Anti-hCD20-Ga-hIgG1fut is shipped at room temperature.
Store lyophilized antibody at -20 °C.
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