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Burjanivova T, Malicherova B, Grendar M, Minarikova E, Dusenka R, Vanova B, Bobrovska M, Pecova T, Homola I, Lasabova Z, Plank L. Detection of BRAFV600E Mutation in Melanoma Patients by Digital PCR of Circulating DNA. Genet Test Mol Biomarkers 2019; 23:241-245. [PMID: 30676087 DOI: 10.1089/gtmb.2018.0193] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
AIMS About 50% of melanomas have the BRAFV600E mutation. This mutation is an attractive therapeutic target. The aims of our study were to detect BRAFV600E mutations within circulating cell-free DNA in plasma ("liquid biopsy") by a droplet digital PCR (ddPCR) method, and to investigate how well the Breslow-Clark score can be predicted by ddPCR. MATERIALS AND METHODS We analyzed 113 patients with malignant melanoma. ddPCR was performed using the QX200 system (BIO-RAD®, Hercules). All samples were tested in duplicate. Besides the results of the liquid biopsy, we have collected data on gender and age of the patients, as well as the mitotic activity of the tumor; the tumor subtype and localization, and the Breslow-Clark score. The limit of detection (LoD) was determined by the method of Tzonev. The LoD was found to be five events per well. RESULTS The BRAFV600E mutation was detected in 37 of 113 samples. A moderate predictive accuracy of the Breslow-Clark score can be attained with the mitotic activity and the type of melanoma as the most important predictors. CONCLUSION Our results show that ddPCR is a highly sensitive method and could be used for a routine laboratory detection of the BRAFV600E mutation as well as for follow-up monitoring to determine the treatment response in patients with malignant melanomas.
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Affiliation(s)
- Tatiana Burjanivova
- 1 Division of Oncology, Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia.,2 Department of Molecular Biology, and Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia
| | - Bibiana Malicherova
- 1 Division of Oncology, Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia.,2 Department of Molecular Biology, and Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia
| | - Marian Grendar
- 3 Bioinformatic Unit, Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia
| | - Eva Minarikova
- 4 Clinic of Dermatovenerology, Jessenius Faculty of Medicine and University Hospital in Martin, Martin, Slovakia
| | - Robert Dusenka
- 5 Department of Urology, Jessenius Faculty of Medicine and University Hospital in Martin, Martin, Slovakia
| | - Barbora Vanova
- 1 Division of Oncology, Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia.,2 Department of Molecular Biology, and Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia
| | - Martina Bobrovska
- 6 Department of Pathological Anatomy, and Jessenius Faculty of Medicine and University Hospital in Martin, Martin, Slovakia
| | - Tatiana Pecova
- 4 Clinic of Dermatovenerology, Jessenius Faculty of Medicine and University Hospital in Martin, Martin, Slovakia
| | - Igor Homola
- 7 Department of Plastic Surgery, Jessenius Faculty of Medicine and University Hospital in Martin, Martin, Slovakia
| | - Zora Lasabova
- 1 Division of Oncology, Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia.,2 Department of Molecular Biology, and Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia
| | - Lukas Plank
- 1 Division of Oncology, Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia.,6 Department of Pathological Anatomy, and Jessenius Faculty of Medicine and University Hospital in Martin, Martin, Slovakia
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