Tocilizumab antibody | AbD21345_hIgG1

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Human anti Tocilizumab

Anti-tocilizumab antibody is a recombinant, neutralizing anti-idiotypic antibody in fully human IgG1 format, suitable for bioanalytical assays for tocilizumab and biosimilars. It is recommended as a reference standard with lower affinity for an ADA bridging ELISA.

Product Type
Monoclonal Antibody
Clone
AbD21345_hIgG1
Isotype
IgG1
Product CodeApplicationsDatasheetMSDSPack SizeList PriceQuantity
HCA256 E 0.1 mg
Human anti tocilizumab, clone AbD21345_hIgG1 is a Type 1 anti-idiotypic antibody that specifically recognizes free tocilizumab but not the drug/Interleukin-6 Receptor (IL-6R) complex. Clone AbD21345_hIgG1 inhibits the binding of tocilizumab to IL-6R and can be used to measure free tocilizumab levels in serum from patients. This clone can also be used for pharmacokinetic (PK) assay development or in the development and calibration of anti-drug antibody (ADA) assays.

Tocilizumab, marketed under the brand name RoActemra® in Europe and Actemra® in North America, 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. This therapeutic antibody, directed against IL-6R, 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.

Clone AbD21354_hIgG1 is one of a range of Type 1 (HCA252), (HCA253), (HCA254), (HCA255) and Type 2 (HCA257) anti-idiotypic antibodies to tocilizumab available from Bio-Rad and forms part of a wider and expanding portfolio of anti-idiotypic antibodies that have been developed for the detection of biotherapeutics.

Product Details

Product Form
Human IgG1 antibody (lambda light chain) selected from the HuCAL® phage display library and expressed in a human cell line. This antibody is supplied as a liquid.
Preparation
Purified IgG prepared by affinity chromatography on Protein A
Buffer Solution
Phosphate buffered saline
Preservative Stabilisers
0.01% Thiomersal
Immunogen
Tocilizumab
Affinity
The monovalent intrinsic affinity of this antibody was measured as KD = 15 nM by real time, label free molecular interaction analysis on immobilized tocilizumab.
Approx. Protein Concentrations
Antibody concentration 0.5 mg/ml

Storage Information

Storage
Store at +4oC or at -20oC if preferred.
Storage in frost-free freezers is not recommended.
This product should be stored undiluted. Avoid repeated freezing and thawing as this may denature the antibody. Should this product contain a precipitate we recommend microcentrifugation before use
Shelf Life
12 months from date of despatch

More Information

Acknowledgements
Sold under license of U.S. Patents 6753136, 7785859 and 8273688 and corresponding patents. This antibody was developed by Bio-Rad, Zeppelinstr. 4, 82178 Puchheim, Germany.
Actemra® and RoActemra® are registered trademarks of Hoffman-La Roche and Chugai Pharmaceuticals co., Ltd.
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.
Regulatory
For research purposes only

Applications of Tocilizumab antibody

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
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 ELISA or as a detection reagent in a bridging ELISA together with HCA252 as the capture reagent.
Protocol: PK bridging ELISA to measure free drug
This antibody is fully human and can be used as a reference standard in an ADA assay.
Protocol: ADA bridging ELISA

Useful Reagents Available

Description Product Code Pack Size Applications List Price Quantity
Hispec Assay Diluent BUF049A 50 ml E IY
Human anti Tocilizumab HCA252 0.1 mg E*
Human anti Tocilizumab HCA253 0.1 mg E
Human anti Tocilizumab HCA254 0.1 mg E
Human anti Tocilizumab HCA255 0.1 mg E
Human anti Tocilizumab HCA257 0.1 mg E
LYNX Rapid HRP Antibody Conjugation Kit LNK001P 1 Conjugation For 400µg Antibody CJ
LYNX Rapid HRP Antibody Conjugation Kit LNK002P 3 Conjugations For 400µg Antibody CJ
LYNX Rapid HRP Antibody Conjugation Kit LNK003P 1 Conjugation For 4mg Antibody CJ
LYNX Rapid HRP Antibody Conjugation Kit LNK004P 5 Conjugations For 4mg Antibody CJ
LYNX Rapid HRP Antibody Conjugation Kit LNK005P 1 Conjugation For 20mg Antibody CJ
LYNX Rapid HRP Antibody Conjugation Kit LNK006P 3 Conjugations For 40µg Antibody CJ