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Updated: Jan 30, 2026

Quantitative Immunoblotting of Cell Lines as a Standard to Validate Immunofluorescence for Quantifying Biomarker Proteins in Routine Tissue Samples
09:58

Quantitative Immunoblotting of Cell Lines as a Standard to Validate Immunofluorescence for Quantifying Biomarker Proteins in Routine Tissue Samples

Published on: January 7, 2019

9.3K

Quantitative Immunoblotting of Cell Lines as a Standard to Validate Immunofluorescence for Quantifying Biomarker

Alison M Moore1, Lee R Boudreau2, Shakeel Virk2

  • 1Department of Pathology and Molecular Medicine, Queen's University; Division of Cancer Biology and Genetics, Queen's Cancer Research Institute.

Journal of Visualized Experiments : Jove
|January 22, 2019
PubMed

Insights

Quantifying proteins in formalin-fixed, paraffin-embedded (FFPE) tissues is crucial. Immunofluorescence (IF) with image analysis offers a robust, linear method for accurate protein quantification in FFPE samples, preserving tissue structure.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Pathology

Background:

  • Accurate protein quantification in formalin-fixed, paraffin-embedded (FFPE) tissues is vital for clinical diagnostics and research.
  • Existing methods like immunohistochemistry (IHC) and mass spectrometry have limitations in accuracy, dynamic range, or sample integrity.
  • There is a need for a quantitative method that maintains FFPE tissue structure for cell-type specific analysis.

Purpose of the Study:

  • To develop and validate a novel method for protein quantification in FFPE tissues.
  • To assess the accuracy, dynamic range, and linearity of the proposed method compared to gold standards.
  • To demonstrate the preservation of tissue structural integrity for cell-type identification.

Main Methods:

  • Utilized immunofluorescence (IF) in conjunction with advanced image analysis techniques.
  • Quantified protein abundance in FFPE tissue samples.
  • Compared results against quantitative immunoblotting as the gold standard.

Main Results:

  • The proposed IF and image analysis method demonstrated ease of optimization.
  • The method exhibited a wide dynamic range and linear quantifiability.
  • Structural integrity of FFPE samples was maintained, allowing for cell-type specific analysis.

Conclusions:

  • Immunofluorescence (IF) coupled with image analysis provides a robust and adaptable method for relative protein quantification in FFPE tissues.
  • This technique overcomes limitations of traditional methods by preserving sample integrity and enabling cell-type specific quantification.
  • The method is suitable for both clinical and research applications requiring accurate protein analysis in FFPE samples.

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