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Antibody-based surfaces: rapid characterization using two complementary colorimetric assays.

Thomas Moreau¹, Clément Faye, Mickael Baqué

¹Institut des Biomolécules Max Mousseron (IBMM), Unité Mixte de Recherche 5247, Centre National de la Recherche Scientifique, Université de Montpellier 1, Université de Montpellier 2, place E. Bataillon, CC17006, 34095 Montpellier cedex 5, France. tmoreau@univ-montp2.fr

Analytica Chimica Acta

|October 26, 2011

Summary

This summary is machine-generated.

Two new colorimetric assays, ADECA and A(2)HRP, rapidly assess antibody grafting efficiency and activity on surfaces. These methods aid in optimizing antibody immobilization for various applications.

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Area of Science:

Bioconjugation Chemistry
Assay Development
Surface Science

Background:

Optimizing antibody grafting on diverse solid surfaces is challenging due to varied materials, chemistries, and formats.
Pre-screening methods are crucial for evaluating grafting efficiency (GE) and specific activity (SA).

Purpose of the Study:

To develop and validate two novel colorimetric assays for assessing antibody grafting performance.
To provide rapid and sensitive tools for pre-screening antibody immobilization on various surfaces.

Main Methods:

Development of ADECA (Amino Density Estimation by Colorimetric Assay) for estimating grafted antibody density and calculating GE.
Development of A(2)HRP (Antibody Anti-HorseRadish Peroxidase) assay to quantify active antibody.
Validation of assay parameters including limit of detection, repeatability, and linearity.
Application of assays on commercially available microplates to assess antibody grafting performance.

Main Results:

ADECA provides a rapid estimation of grafted antibody density, enabling GE calculation.
A(2)HRP quantifies the amount of active antibody.
Combined use of ADECA and A(2)HRP allows determination of SA for grafted antibodies.
The assays demonstrated good analytical performance and suitability for microplate formats.

Conclusions:

The developed colorimetric assays (ADECA and A(2)HRP) are rapid, sensitive, and versatile for pre-screening antibody grafting.
These assays facilitate the optimization of antibody immobilization across different surface formats and chemistries.
The methods offer a valuable tool for researchers working with antibody-surface conjugations.