Natalizumab antibody | AbD21375

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Human anti Natalizumab

Anti-natalizumab antibody is a recombinant, neutralizing anti-idiotypic antibody in monovalent Fab format; it is ideal for bioanalytical assay development to measure levels of natalizumab or biosimilars. It is recommended as capture antibody in PK bridging ELISA with HCA249/HCA249P.

Product Type
Monoclonal Antibody
Clone
AbD21375
Isotype
HuCAL Fab monovalent
Product CodeApplicationsDatasheetMSDSPack SizeList PriceQuantity
HCA248 E 0.1 mg
Human Anti-Natalizumab Antibody, clone AbD21375 is a paratope specific, anti-idiotypic antibody that specifically recognizes free natalizumab but not free human alpha-4/beta-1 integrin or the drug/integrin complex. It inhibits the binding of natalizumab to its target and can be used to measure levels of free natalizumab and biosimilar products in bioanalytical and patient monitoring assays.

A pair of anti-natalizumab 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-Natalizumab Antibody in full immunoglobulin format, clone AbD21375_hlgG1 (HCA249) as the detection antibody.

Natalizumab (Tysabri) is a humanized IgG4/kappa monoclonal antibody approved as a monotherapy for the treatment of relapsing forms of multiple sclerosis and for the treatment of Crohn’s disease. It is directed against alpha-4 integrin (CD49d), and binds to alpha-4/beta-1 integrin on the surface of circulating leucocytes, except neutrophils. It is believed to act by blocking the interaction of alpha-4/beta-1 integrin with vascular cell adhesion molecule-1 (VCAM-1), preventing the adherence and transport of inflammatory immune cells across the intestinal lining and blood-brain barrier.

View a summary of all anti-natalizumab antibodies

Product Details

Product Form
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.
Preparation
Metal chelate affinity chromatography
Buffer Solution
Phosphate buffered saline
Preservative Stabilisers
0.01% Thiomersal
Immunogen
Natalizumab
Affinity
The monovalent intrinsic affinity of this antibody was measured as KD = 2.1 nM by real time, label free molecular interaction analysis on immobilized natalizumab.
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
Guarantee
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. Tysabri® is a registered trademark Biogen Idec and Elan.
His-tag is a registered trademark of EMD Biosciences.
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 Natalizumab 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 either a direct ELISA or indirect ELISA both as a capture reagent and as a detection reagent.
Protocol: PK bridging ELISA to measure free drug

Useful Reagents Available

Description Product Code Pack Size Applications List Price Quantity
Hispec Assay Diluent BUF049A 50 ml E IY
Human anti Natalizumab HCA249 0.1 mg E
Human anti Natalizumab HCA250 0.1 mg E
LYNX Rapid HRP Antibody Conjugation Kit LNK002P 3 Conjugations For 400µg Antibody CJ
Rat anti DYKDDDDK Tag:HRP MCA4764P 0.1 mg E P WB
Mouse anti Penta Histidine Tag:HRP MCA5995P 125 µl E WB
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