2026-04-19T19:22:10Zhttps://recercat.cat/oai/request

oai:recercat.cat:11351/136982025-10-24T10:41:01Zcom_2072_378070com_2072_378040col_2072_378092

00925njm 22002777a 4500 dc Mayo de las Casas, Clara author Jantus Lewintre, Eloisa author Ortiz Reina, Sebastián author Drozdowskyj, Ana author Cerezuela-Fuentes, Pablo author MANZANO, JOSE LUIS author MUÑOZ COUSELO, EVA author 2025-09-19T12:01:46Z 2025-09-19T12:01:46Z 2025 Melanoma; Mutació BRAF; Biòpsia líquida Melanoma; Mutación BRAF; Biopsia líquida Melanoma; BRAF mutation; Liquid biopsy Background BRAF p.V600 mutation is the most frequent molecular driver alteration in melanoma. Detection of BRAF mutations in circulating-free DNA (cfDNA) reflects the shedding of tumor DNA and offers a potential non-invasive biomarker for disease monitoring and prognosis. However, the lack of standardized methodologies and inter-assay variability hinders its clinical implementation. Methods The sensitivity, agreement and concordance of seven BRAF mutation detection assays were assessed across four laboratories. BRAF p.V600 mutation in pretreatment plasma samples was analyzed in 51 patients diagnosed with advanced stage melanoma using two digital PCR-based assays (droplet digital PCR -ddPCR- Bio-Rad and microfluidic digital PCR -Absolute Q, ThermoFisher Scientific-), three RT-PCR based assays (Idylla®, Cobas®, PNA-Q-PCR) and two NGS based assays (Oncomine™ Pan-Cancer Cell-Free Assay and Illumina Platforms). Results digital PCR-based assays and Cobas® exhibited the highest sensitivity (51.0 %), followed by NGS Illumina® (45.1 %), Oncomine NGS / PNA-Q-PCR (43.1 %) and Idylla® (37.2 %). Results of different techniques showed a moderate to strong agreement, except for the comparison of Cobas with Idylla that was poor (Kappa=0.57). There was near-perfect agreement on detection of BRAF mutation between both NGS platforms and the NGS Illumina® with PNA-Q-PCR (Kappa = 0.92). Concordance of the quantitative results in terms of mutant allele frequency was near-perfect between NGS Illumina and ddPCR Bio-Rad assays (ICC = 0.99). Conclusions Our study demonstrates substantial agreement among multiple cfDNA BRAF mutation detection assays, particularly between NGS and digital PCR assays. These findings support the potential utility of different techniques for BRAF testing in cfDNA. This study was supported by the Novartis Group. http://hdl.handle.net/11351/13698 Anomalies cromosòmiques Melanoma - Aspectes genètics Melanoma - Prognosi PHENOMENA AND PROCESSES::Genetic Phenomena::Genetic Variation::Mutation DISEASES::Neoplasms::Neoplasms by Histologic Type::Neoplasms, Germ Cell and Embryonal::Neuroectodermal Tumors::Neuroendocrine Tumors::Melanoma Other subheadings::Other subheadings::Other subheadings::/genetics CHEMICALS AND DRUGS::Nucleic Acids, Nucleotides, and Nucleosides::Nucleic Acids::Cell-Free Nucleic Acids CHEMICALS AND DRUGS::Enzymes and Coenzymes::Enzymes::Transferases::Phosphotransferases::Phosphotransferases (Alcohol Group Acceptor)::Protein Kinases::Protein-Serine-Threonine Kinases::MAP Kinase Kinase Kinases::raf Kinases::Proto-Oncogene Proteins c-raf ANALYTICAL, DIAGNOSTIC AND THERAPEUTIC TECHNIQUES, AND EQUIPMENT::Diagnosis::Prognosis FENÓMENOS Y PROCESOS::fenómenos genéticos::variación genética::mutación ENFERMEDADES::neoplasias::neoplasias por tipo histológico::neoplasias de células germinales y embrionarias::tumores neuroectodérmicos::tumores neuroendocrinos::melanoma Otros calificadores::Otros calificadores::Otros calificadores::/genética COMPUESTOS QUÍMICOS Y DROGAS::nucleótidos y nucleósidos de ácidos nucleicos::ácidos nucleicos::ácidos nucleicos libres de células COMPUESTOS QUÍMICOS Y DROGAS::enzimas y coenzimas::enzimas::transferasas::fosfotransferasas::fosfotransferasas (grupo alcohol aceptor)::proteína cinasas::proteína-serina-treonina cinasas::MAP cinasa cinasa cinasas::cinasas raf::proteínas protooncogénicas c-raf TÉCNICAS Y EQUIPOS ANALÍTICOS, DIAGNÓSTICOS Y TERAPÉUTICOS::diagnóstico::pronóstico Cross-method comparison for BRAF p.V600 mutation cfDNA testing in Melanoma: BRAFI study