Related Experiment Video
Updated: Apr 18, 2026
Employing Digital Droplet PCR to Detect BRAF V600E Mutations in Formalin-fixed Paraffin-embedded Reference Standard Cell Lines
Published on: October 8, 2015
Validation of a Manual Protocol for BRAF V600E Mutation-specific Immunohistochemistry
Hanns C Dinges1, David Capper, Olga Ritz
1*Division of Molecular Diagnostics, Institute of Pathology, University Ulm, Ulm †Department of Neuropathology and Clinical Cooperation Unit Neuropathology, German Cancer Research Center (DKFZ), Institute of Pathology, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany.
Detection of BRAF V600E mutations is crucial for cancer diagnosis and treatment. This study validates manual and automated immunohistochemical protocols, showing they are reliable alternatives to DNA sequencing for BRAF V600E detection in tissues.
Area of Science:
- Oncology
- Molecular Pathology
- Cancer Diagnostics
Background:
- BRAF V600E mutation detection is vital for cancer diagnosis, prognosis, and targeted therapy.
- Immunohistochemistry (IHC) using BRAF V600E-specific antibodies offers a potential alternative to DNA sequencing.
- Standardization of IHC protocols is challenging due to numerous variations.
Purpose of the Study:
- To evaluate and compare the performance of various manual and automated IHC protocols for BRAF V600E detection.
- To assess the utility of IHC as a diagnostic tool against DNA sequencing.
- To optimize BRAF V600E protein detection in formalin-fixed, paraffin-embedded (FFPE) and decalcified tissues.
Main Methods:
- Tested 17 manual IHC protocols with 10 variables and automated IHC staining on FFPE tissues, including decalcified samples.
- Utilized BRAF pyrosequencing as an independent method for comparison.
- Assessed test performance using 4 well-fixed samples (2 wild-type/2 mutated) and 33 independent clinical samples (27 leukemias, 6 melanomas).
Main Results:
- Two manual protocols demonstrated accurate classification of BRAF V600E status in initial testing.
- Manual IHC correctly identified 19 out of 20 V600E-mutated samples, with all wild-type and V600K cases being negative.
- Correlation coefficients between IHC and pyrosequencing ranged from 0.75 to 0.93, with a Youden index of 0.95, indicating substantial agreement.
Conclusions:
- BRAF V600E detection at the protein level using IHC is feasible in routine and decalcified tissues.
- The validated manual protocols can facilitate implementation in diagnostic practice.
- Both IHC and molecular techniques (DNA sequencing) should be considered complementary for comprehensive BRAF mutation analysis.
