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Updated: Mar 25, 2026
Employing Digital Droplet PCR to Detect BRAF V600E Mutations in Formalin-fixed Paraffin-embedded Reference Standard Cell Lines
Published on: October 8, 2015
Multicenter Evaluation of a Novel Automated Rapid Detection System of BRAF Status in Formalin-Fixed,
Ana-Iris Schiefer1, Laura Parlow2, Lisa Gabler1
1Department of Pathology, Medical University of Vienna, Vienna, Austria.
Abstract:
The mutated BRAF oncogene represents a therapeutic target in malignant melanoma. Because BRAF mutations are also involved in the pathogenesis of other human malignancies, the use of specific BRAF inhibitors might also be extended to other diseases in the future. A prerequisite for the clinical application of BRAF inhibitors is the reliable detection of activating BRAF mutations in routine histopathological samples. In a multicenter approach, we evaluated a novel and fully automated PCR-based system (Idylla) capable of detecting BRAF V600 mutations in formalin-fixed, paraffin-embedded tissue within 90 minutes with high sensitivity. We analyzed a total of 436 samples with the Idylla system. Valid results were obtained in 421 cases (96.56%). Its performance was compared with conventional methods (pyrosequencing or Sanger sequencing). Concordant results were obtained in 406 cases (96.90%). Reanalysis of eight discordant samples by next-generation sequencing and/or pyrosequencing with newly extracted DNA and the BRAF RGQ Kit confirmed the Idylla result in seven cases, resulting in an overall agreement of 98.57%. In conclusion, the Idylla system is a highly reliable and sensitive platform for detection of BRAF V600 mutations in formalin-fixed, paraffin-embedded material, providing an efficient alternative to conventional diagnostic methods, particularly for routine diagnostics laboratories with limited experience in molecular pathology.
Insights
The Idylla system reliably detects BRAF V600 mutations in formalin-fixed, paraffin-embedded tissue. This automated PCR test offers a sensitive and efficient alternative for routine molecular diagnostics.
Area of Science:
- Oncology
- Molecular Diagnostics
- Genetics
Background:
- BRAF oncogene mutations are key drivers in malignant melanoma and other cancers.
- Targeted BRAF inhibitors show therapeutic promise, necessitating accurate mutation detection.
- Reliable identification of BRAF mutations in routine histopathology is crucial for clinical application.
Purpose of the Study:
- To evaluate the performance of a novel, automated PCR-based system (Idylla) for detecting BRAF V600 mutations.
- To assess the sensitivity and reliability of the Idylla system in formalin-fixed, paraffin-embedded (FFPE) tissues.
- To compare the Idylla system's results with conventional molecular diagnostic methods.
Main Methods:
- A multicenter study analyzed 436 FFPE samples using the automated Idylla system.
- The Idylla system utilizes PCR technology for rapid BRAF V600 mutation detection.
- Results were compared against conventional methods like pyrosequencing and Sanger sequencing.
Main Results:
- The Idylla system provided valid results for 96.56% of analyzed samples.
- Overall agreement with conventional methods was high, reaching 96.90% initially.
- Further analysis of discordant cases confirmed Idylla's accuracy, achieving 98.57% overall agreement.
Conclusions:
- The Idylla system demonstrates high reliability and sensitivity for detecting BRAF V600 mutations in FFPE samples.
- It offers an efficient and accurate alternative to conventional methods for routine diagnostic laboratories.
- The automated platform simplifies molecular pathology workflows, especially for labs with limited experience.
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