Analysis Affinity of Infliximab and Etanercept with TNF by KinExA (CAT#: STEM-MB-0028-CJ)

Introduction

TNF neutralizing biologics infliximab (Inf) , and etanercept (Eta) have distinct clinical efficacy profiles.Infliximab, Etanercept, and Etanercept bioanalogitics belong to a class of drugs known as tumor necrosis factor α (TNFα) blockers (or anti-TNF α). An anti-TNF α product is a protein (antibody) that blocks a naturally occurring chemical in the body called tumor necrosis factor (TNF) , which can cause inflammation in the body. Such inflammation occurs when the body's immune system attacks its own tissues (autoimmune diseases).

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Principle Applications Procedure Materials Notes Related Products

Principle

KinExA is a two-stage analysis system. In the first stage, a number of solutions are prepared, where one partner remains constant (constant binding partner, or CBP) and the other (titrant) is variable, usually serially diluted. As the titrant is added, the free CBP decreases and is analysed by a sophisticated and precise microfluorescence measurement device. The signal generated can be mathematically related to the affinity (KD) of the two molecules for each other, as well as the kinetic parameters of binding (kon) and dissociation (koff).

Applications

Oncology & Cancer; Immunology/Inflammation, Toxicology; Pharmacology

Procedure

1. preparation of the functionalized beads which will capture the analyte for measuremen.
2. preparation of a series of solutions consisting of a constant initial concentration of one component of the binary reaction and serial dilutions of the other reactant. The component that is kept constant is the constant binding partner (CBP) , and is the one which will be analyzed.
3. each reaction mixture is sampled and the fluorescence of free CBP bound to the capture beads is obtained for subsequent numerical analysis.

Materials

• Sample Type: Antibodies, Cells Proteins, DNA, Viruses, Serum, & More
• Equipment: Kinetic Exclusion Assay (KinExA)

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