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Related Experiment Video

Updated: May 28, 2026

Multiplex Immunofluorescence Combined with Spatial Image Analysis for the Clinical and Biological Assessment of the Tumor Microenvironment
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Published on: June 2, 2023

A Customizable Tyramide Signal Amplification-Based Multiplex Immunofluorescence Protocol for FFPE Tissues.

Wenjie Sheng1, T M Mohiuddin1,2, Chaoyu Zhang1

  • 1Department of Gynecology and Obstetrics, Medical Faculty, Justus-Liebig-University Giessen, Klinikstr. 33, 35392 Giessen, Germany.

Current Issues in Molecular Biology
|May 27, 2026
PubMed
Summary

This study presents a flexible, kit-independent multiplex immunofluorescence protocol for formalin-fixed paraffin-embedded tissues. The method enables clear visualization of multiple protein markers in FFPE samples, offering an accessible alternative to commercial kits.

Keywords:
FFPEHRP-conjugated secondary antibodyTSAantibody strippingfluorophore labelingheat-induced epitope removalmIFmulti-channel imaging

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Area of Science:

  • Biomedical Research
  • Histopathology
  • Molecular Biology

Background:

  • Formalin-fixed paraffin-embedded (FFPE) tissues are crucial for research, preserving tissue architecture and molecular information.
  • Multiplex immunofluorescence (mIF) allows simultaneous detection of multiple antigens in a single FFPE tissue section.
  • Tyramide signal amplification (TSA) enhances mIF sensitivity.

Purpose of the Study:

  • To develop and validate a customizable, kit-independent TSA-based mIF protocol.
  • To demonstrate the protocol's utility in FFPE endometriosis tissue.
  • To provide an accessible alternative to commercial mIF kits.

Main Methods:

  • Utilized commercially available horseradish peroxidase (HRP)-conjugated secondary antibodies and tyramide-fluorophore reagents.
  • Employed heat-induced epitope removal (HIER) between staining rounds to strip antibodies while preserving signals.
  • Applied the protocol to FFPE endometriosis tissue, targeting ERα, PR, αSMA, CD20, and CD31.
  • Performed fluorescence imaging with a multi-channel slide scanner and optimized fluorophore selection.

Main Results:

  • Achieved clear visualization of marker-specific staining patterns in FFPE endometriosis tissue.
  • Demonstrated preserved tissue morphology alongside multiplexed antigen detection.
  • Successfully applied heat-induced epitope removal to enable sequential antibody stripping and signal deposition.

Conclusions:

  • The developed protocol offers a practical and flexible approach to TSA-based mIF for FFPE tissues.
  • This kit-independent method provides an accessible alternative for researchers.
  • Further validation is needed for quantitative performance and broader tissue applicability.