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Updated: Jun 6, 2026

Proteomic Sample Preparation from Formalin Fixed and Paraffin Embedded Tissue

Proteomic Sample Preparation from Formalin Fixed and Paraffin Embedded Tissue

Published on: September 2, 2013

A well-based reverse-phase protein array applicable to extracts from formalin-fixed paraffin-embedded tissue.

Joon-Yong Chung¹, Seo-Jin Lee, Ylaya Kris

¹Tissue Array Research Program, Laboratory of Pathology, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA.

Proteomics. Clinical Applications

|December 8, 2010

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We developed a novel protein extraction method for formalin-fixed paraffin-embedded (FFPE) tissues, enhancing proteomic analysis. This technique improves protein recovery and preserves immunoreactivity for biomarker discovery in clinical studies.

Area of Science:

Biochemistry
Molecular Biology
Proteomics

Background:

Formalin-fixed paraffin-embedded (FFPE) tissue proteomic analysis is valuable for diagnostics but challenging due to protein crosslinking.
Existing methods often compromise protein integrity and yield.

Purpose of the Study:

To develop a reliable protein extraction method for FFPE tissues to overcome fixation-induced challenges.
To establish a protein-profiling platform for molecular analysis of FFPE samples.

Main Methods:

A heat-induced antigen retrieval method using a pressure cooker was employed for protein extraction from FFPE tissues.
A well-based reversed-phase (RP) protein array platform with electrochemiluminescence detection was developed.
Laser capture microdissection was used to obtain FFPE protein samples for array analysis.

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Main Results:

The novel extraction method achieved approximately 90% protein yield compared to frozen tissue.
Western blotting confirmed preservation of immunoreactivity and recovery of full-length proteins.
The RP protein array platform detected measurable signal differences from minimal FFPE samples (500 shots), with lysates stable for one month at room temperature.

Conclusions:

The developed protein extraction method and RP protein array platform enable robust molecular profiling of FFPE tissues.
This approach facilitates biomarker validation and development for clinical studies using archival FFPE samples.