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Evaluating real-time immunohistochemistry on multiple tissue samples, multiple targets and multiple antibody labeling

Louise Dubois, Karl Andersson, Anna Asplund

¹Department of Radiology, Oncology, and Radiation Sciences; Biomedical Radiation Sciences, Rudbeck Laboratory, Uppsala University, 75185 Uppsala, Sweden. hanna.bjorkelund@bms.uu.se.

BMC Research Notes

|December 20, 2013

Summary

Real-time immunohistochemistry (RT-IHC) offers a standardized, quantitative method for analyzing protein expression in tissues. This technique tracks antibody-antigen interactions over time, improving assay optimization and sensitivity in pathology.

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Quantitation of Protein Expression and Co-localization Using Multiplexed Immuno-histochemical Staining and Multispectral Imaging

Quantitation of Protein Expression and Co-localization Using Multiplexed Immuno-histochemical Staining and Multispectral Imaging

Published on: April 8, 2016

Area of Science:

Biotechnology
Molecular Biology
Pathology

Background:

Immunohistochemistry (IHC) is a standard pathology technique for protein expression analysis.
Current IHC methods involve subjective interpretation and lack standardization, leading to variability.
Real-time immunohistochemistry (RT-IHC) offers a novel, operator-independent approach for time-resolved antibody-target protein interactions.

Purpose of the Study:

To evaluate the technical aspects and general applicability of RT-IHC.
To determine the quantitative potential of RT-IHC for protein analysis.
To understand antibody-antigen kinetics for optimizing conventional IHC protocols.

Main Methods:

Applied three different antibodies (fluorescent or radioactive labels) to nine human and mouse tissue samples.
Utilized RT-IHC to capture time-resolved binding curves of antibody-antigen interactions.
Assessed the impact of tissue size, thickness, and section position on signal magnitude and binding kinetics.

Main Results:

RT-IHC demonstrated general applicability across various antibodies and tissue types.
Most antibody-antigen interactions did not reach equilibrium within 3 hours, indicating potential under-optimization in standard IHC.
Binding curve curvature, reflecting interaction kinetics, was independent of tissue size, thickness, and position, suggesting a robust quantitative parameter.

Conclusions:

RT-IHC is a versatile and generalizable method for evaluating antibody-antigen interactions.
Analyzing binding kinetics over time provides insights for optimizing conventional IHC assays.
RT-IHC has the potential to improve sensitivity and standardization in protein expression analysis.