Tocilizumab antibody | AbD21362

Human anti Tocilizumab

Product Type
Monoclonal Antibody
Clone
AbD21362
Isotype
HuCAL Fab monovalent
Specificity
Tocilizumab

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HCA252
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HCA252G
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Human Anti-Tocilizumab Antibody, clone AbD21362 is a paratope specific, anti-idiotypic antibody that binds to free tocilizumab but not to human Interleukin-6 Receptor (IL-6R) or the drug/IL-6R complex. The antibody can be used to measure the levels of tocilizumab and biosimilar products in bioanalytical and patient monitoring assays.

A pair of anti-tocilizumab antibodies can be used to develop a pharmacokinetic (PK) bridging assay to measure free drug. This antibody, in monovalent Fab format, is recommended as a capture antibody, paired with an HRP conjugated Anti-Tocilizumab Antibody in full immunoglobulin format, clone AbD21338_hIgG1 (HCA253) as the detection antibody.

Tocilizumab (RoActemra/Actemra) is a humanized IgG1/kappa monoclonal antibody approved for the treatment of moderate to severe rheumatoid arthritis and for the treatment of systemic juvenile idiopathic arthritis. The therapeutic antibody is directed against IL-6R and acts by blocking the binding of IL-6R (both the soluble form, sIL-6R, and the membrane bound form, mIL-6R) to IL-6, thus impeding the pro-inflammatory properties of this cytokine.

View a summary of all anti-tocilizumab antibodies

Product Form
Pack Size: 0.1 mg
A monovalent human recombinant Fab (kappa light chain) selected from the HuCAL phage display library, expressed in E. coli The antibody is tagged with a DYKDDDDK tag and a HIS-tag (HHHHHH) at the C-terminus of the antibody heavy chain. This antibody is supplied as a liquid.
Pack Size: 1 mg
A monovalent human recombinant Fab (kappa light chain) selected from the HuCAL phage display library, expressed in E. coli. The antibody is tagged with a DYKDDDDK tag and a HIS-tag (HHHHHH) at the C-terminus of the antibody heavy chain. This antibody is supplied as a liquid.
Buffer Solution
Phosphate buffered saline.
Preservative Stabilisers
0.01% Thiomersal.
Immunogen
Tocilizumab
Affinity
The intrinsic affinity of the monovalent form of this antibody is KD=0.9 nM as measured by real time, label-free molecular interaction analysis on immobilized tocilizumab.
Approx. Protein Concentrations
Pack Size: 0.1 mg
Antibody concentration 0.5 mg/ml.
Pack Size: 1 mg
Antibody concentration 1.0 mg/ml.
Regulatory
For research purposes only.
Guarantee
12 months from date of despatch.
Acknowledgements
This product and/or its use is covered by claims of U.S. patents, and/or pending U.S. and non-U.S. patent applications owned by or under license to Bio-Rad Laboratories, Inc. See bio-rad.com/en-us/trademarks for details.
Actemra and RoActemra are registered trademarks of Hoffman-La Roche and Chugai Pharmaceuticals co., Ltd.
His-tag is a trademark of EMD Biosciences.

This product is shipped at ambient temperature. It is recommended to aliquot and store at -20°C on receipt. When thawed, aliquot the sample as needed. Keep aliquots at 2-8°C for short term use (up to 4 weeks) and store the remaining aliquots at -20°C.

Avoid repeated freezing and thawing as this may denature the antibody. Storage in frost-free freezers is not recommended.

This product has been reported to work in the following applications. This information is derived from testing within our laboratories, peer-reviewed publications or personal communications from the originators. Please refer to references indicated for further information. For general protocol recommendations, please visit the antibody protocols page.
Application Name Verified Min Dilution Max Dilution
ELISA 1
  1. 1 NB. The Rat anti DYKDDDDK-tag antibody, clone 6F7 is not suitable for use with this antibody as clone 6F7 exhibits cross reactivity with the human IL-6R
Where this product has not been tested for use in a particular technique this does not necessarily exclude its use in such procedures. Suggested working dilutions are given as a guide only. It is recommended that the user titrates the product for use in their own system using appropriate negative/positive controls.
Technical Advice
Recommended protocols and further information about HuCAL recombinant antibody technology can be found in the HuCAL Antibodies Technical Manual.
ELISA
This product may be used in a direct or indirect ELISA or as a capture reagent in a PK bridging ELISA together with HCA253 as the detection reagent.
Protocol: PK bridging ELISA to measure free drug.

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Synonyms
ACTEMRA®
ROACTEMRA®
Licensed Use
For in vitro research purposes and for commercial applications for the provision of in vitro testing services to support preclinical and clinical drug development. Any re-sale in any form or any other commercial application needs a written agreement with Bio-Rad.
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Please Note: All Products are "FOR RESEARCH PURPOSES ONLY"