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Related Concept Videos

Immunocytochemistry and Immunohistochemistry01:22

Immunocytochemistry and Immunohistochemistry

Immunocytochemistry (ICC) and immunohistochemistry (IHC) are techniques that use antibodies to check for specific proteins or antigens in a sample. The technique was first published by Albert Coons in 1941 to detect the presence of pneumococcal antigen in tissue sections from mice infected with Pneumococcus. Immunocytochemistry helps localization of proteins or antigens in individual cells like blood cells, stem cells, etc., while immunohistochemistry does the same for tissue samples.
These...
Immunogold Electron Microscopy01:20

Immunogold Electron Microscopy

Immunoelectron microscopy utilizes immunogold labeling of endogenous proteins with specific antibodies to detect and localize these proteins in cells and tissues. The procedure provides insights into the distribution and quantification of protein under different stimulation conditions offering clues about their functions. Conjugating highly electron-dense gold particles with primary or secondary antibodies allow antigen detection on and within cells, with high resolution and specificity.

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Optimization, Design and Avoiding Pitfalls in Manual Multiplex Fluorescent Immunohistochemistry
09:15

Optimization, Design and Avoiding Pitfalls in Manual Multiplex Fluorescent Immunohistochemistry

Published on: July 26, 2019

Molecular-assisted immunohistochemical optimization.

Mohd Feroz Mohd Omar1, Ning Huang, Keli Ou

  • 1Oncology Research Institute, National University of Singapore, Singapore.

Acta Histochemica
|July 25, 2009
PubMed
Summary

Immunohistochemistry (IHC) validation requires biological context. Optimizing IHC for breast cancer biomarkers revealed that independent molecular analysis is crucial for accurate protein localization and interpretation, preventing misleading results in clinical and research settings.

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Area of Science:

  • Biopathology
  • Protein analysis
  • Cancer biomarker research

Background:

  • Immunohistochemistry (IHC) is vital for protein localization in pathology.
  • Inconsistencies in IHC antibody use create disparities in research and clinical findings.
  • These variations stem from interpretative and technical issues, impacting diagnostic accuracy.

Purpose of the Study:

  • To optimize IHC protocols for five breast cancer biomarkers identified via proteomic analysis.
  • To address variations in immunolocalization and intensity caused by antigen retrieval and antibody concentration.
  • To establish a method for selecting biologically relevant staining patterns.

Main Methods:

  • Optimization of antigen retrieval methods for IHC.
  • Adjustment of primary antibody incubation concentrations.
  • Utilizing an independent molecular analysis method for validation.

Main Results:

  • Significant variations in immunolocalization and intensity were observed during IHC optimization.
  • Independent molecular analysis successfully guided the selection of appropriate staining patterns.
  • Without molecular validation, technically acceptable IHC results could lead to incorrect biological interpretations.

Conclusions:

  • Full validation of IHC protocols necessitates integrating biomarker and disease-specific biological knowledge.
  • Independent molecular analysis is essential for reliable IHC results in clinical and research applications.
  • This approach ensures accurate protein interpretation and application in pathology.