Name: Abatacept (Orencia®)Antibody screening - Qualitative ELISA Kit
Brand: Therapeutic Drug Monitoring
SKU: HUMB00069
Availability: OutOfStock

Abatacept (Orencia®)Antibody screening - Qualitative ELISA Kit

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SKU:

HUMB00069

Product Type:

ELISA Kit

ELISA Type:

Biosimilar ELISA

Biosimilar ELISA Type:

Qualitative

Applications:

ELISA

Reactivity:

Human

Analytes:

Abatacept (Orencia®)

Research Area:

Anti-Inflammatory

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Description

Datasheet

Abatacept (Orencia®) Antibody screening - Qualitative ELISA Kit (HUMB00069)

The Assay Genie Abatacept ELISA has been developed for the qualitative determination of antibodies to abatacept in serum and plasma.

Abatacept (Orencia®) Antibody screening - Qualitative ELISA Kit Test Principle

Solid phase enzyme-linked immunosorbent assay (ELISA) based on the sandwich principle. Controls and samples (serum or plasma) are incubated in the microtiter plate coated with the drug abatacept. After incubation, the wells are washed. Then, horse radish peroxidase (HRP) conjugated probe is added and binds to abatacept antibodies captured by the drug abatacept on the surface of the wells. Following incubation wells are washed and the bound enzymatic activity is detected by addition of tetramethylbenzidine (TMB) chromogen substrate. Finally, the reaction is terminated with an acidic stop solution. The colour developed is proportional to the amount of abatacept antibodies in the sample or controls. The results can be evaluated with using cut-off value.

Abatacept (Orencia®) Antibody screening - Qualitative ELISA Kit Product Information

Information	Description
Application	Antibody screening - Qualitative
Required Volume (µl)	10
Total Time (min)	140
Sample Typle	Serum, plasma
Number of Assays	96
Detection Limit (ng/mL)	+/-
Spike recovery (%)	-
Shelf Life (year)	1

Abatacept (Orencia®) Antibody screening - Qualitative ELISA Kit - General Information

Abatacept is licensed for the treatment of rheumatoid arthritis (RA) in combination with methotrexate. The indication includes moderate to severe RA unresponsive to other disease-modifying antirheumatic drugs including at least one tumour necrosis factor (TNF)- a blocker, or where patients have been intolerant of such drugs. Abatacept (CTLA4Ig) is a fusion protein of the extracellular domain of the human cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4) linked to a modified Fc of human immunoglobulin 1 (IgG1). Abatacept inhibits the activation of T lymphocytes that play an important role in the early stages of pathogenesis of RA.Activation of a T cell requires two signals from the antigen-presenting cell (APC).

The first signal is antigen specific and arises when antigenic peptides are presented to the T cell through the Major Histocompatibility Complex. A second signal, so-called co-stimulation, develops from the interaction between CD80 or CD86 antigen on the APC and CD28 antigen on the T cell. Abatacept binds with the extracellular domain of CTLA-4 to CD80 or CD86 antigen on the APC with a higher affinity than CD28, preventing the essential second signal for T-cell activation. T-cell activation and the production of inflammatory mediators and cytokines (TNF-a, interferon-gamma and interleukin-2) are consequently reduced. Trials in patients with RA have shown that abatacept slows progression of joint damage and improves function.

Abatacept (Orencia®) Antibody screening - Qualitative ELISA Kit Contents

Size	Kit Contents
1x12x8	Microtiter Plate Break apart strips. Microtiter plate with 12 rows each of 8 wells coated with reactant.
1 mL (negative) 0,3 mL (positive)	Control Negative & Positive Ready to use. Contains human serum and stabilizer, <0,1% NaN3.
1x12 mL	Assay buffer Ready to use. Blue coloured. Contains proteins, <0,1% NaN3.
1x12 mL	Horse radish peroxidase conjugated probe. Ready to use. Red coloured. Contains HRP conjugated probe, stabilizer and preservatives.
1x12 mL	TMB substrate solution. Ready to use. Contains 3,3′,5,5′- Tetramethylbenzidine (TMB).
1x12mL	TMB stop solution. Ready to use. 1N HCl
1x50mL	Wash buffer (20x). Prepared concentrated (20x) and should be diluted with the dilution rate given in the “Pretest setup instructions” before the test. Contains buffer with tween 20.
2x1	Adhesive Foil. For covering microtiter plate during incubation

Abatacept (Orencia®) Antibody screening - Qualitative ELISA Kit Protocol

1	Pipette 100µl of Assay Buffer non-exceptionally into each of the wells to be used.
2	Pipette 10 µL of each Negative control, Positive control and samples into the respective wells of microtiter plate Wells A1: Negative control B1: Negative control C1: Positive control D1 and on: Samples
3	Cover the plate with adhesive foil. Briefly mix contents by gently shaking the plate. Incubate 60 minutes at room temperature (18-25°C)
4	Remove adhesive foil. Discard incubation solution. Wash plate three times each with 300 µL Wash Buffer. Remove excess solution by tapping the inverted plate on a paper towel
5	Pipette 100 µL Conjugate into each well
6	Cover the plate with adhesive foil. Incubate 60 minutes at room temperature (18-25°C)
7	Remove adhesive foil. Discard incubation solution. Wash plate three times each with 300 µL Wash Buffer. Remove excess solution by tapping the inverted plate on a paper towel
8	Pipette 100 µL Substrate into each well
9	Incubate 20 minutes without adhesive foil at room temperature (18-25°C) in the dark
10	Stop the substrate reaction by adding 100 µL Stop Solution into each well. Briefly mix contents by gently shaking the plate. Colour changes from blue to yellow.
11	Measure optical density with a photometer at OD 450nm with reference wavelength 650 nm (450/650 nm) within 30 minutes after pipetting the Stop Solution.