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Knol, Anne C.; Vallée, Audrey; Herbreteau, Guillaume; Nguyen, Jean-Michel; Varey, Emilie; Gaultier, Aurélie; Théoleyre, Sandrine; Saint-Jean, Mélanie; Peuvrel, Lucie; Brocard, Anabelle; Quéreux, Gaëlle; Khammari, Amir; Denis, Marc G.; Dréno, Brigitte
Experimental dermatology, October 2016, Letnik: 25, Številka: 10Journal Article
Circulating tumor DNA is a promising non‐invasive tool for cancer monitoring. The main objective of our work was to investigate the relationship between mutant BRAF DNA in plasma and clinical response. Thirty‐eight stage IV patients with a V600 mutated BRAF melanoma were included prior to any treatment. DNA was extracted from plasma and mutant DNA was detected using the amplification‐refractory mutation system method. Before the beginning of any treatment, the corresponding BRAF mutation was detected in 29 of the 38 tested plasma samples (76.3% positive per cent agreement). We observed a strong correlation between the presence of circulating mutated DNA and overall survival (OS; P=.02), and with the number of metastatic sites (P=.01). The presence of circulating mutated DNA was also strongly correlated with serum LDH activity (P<.01) and S100 protein concentration (P<.01). Finally, seven patients presented discordant BRAF status in different tumor sites. In all these patients, the test performed on ctDNA was positive, suggesting that ctDNA analysis might be less sensitive to tumor heterogeneity. Altogether, these results suggest that plasmatic mutant BRAF DNA is a prognostic factor of OS, correlated with tumor burden. In addition, it represents an interesting alternative source of DNA to detect BRAF mutations before treatment.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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