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Zulato, Elisabetta; Attili, Ilaria; Pavan, Alberto; Nardo, Giorgia; Del Bianco, Paola; Boscolo Bragadin, Andrea; Verza, Martina; Pasqualini, Lorenza; Pasello, Giulia; Fassan, Matteo; Calabrese, Fiorella; Guarneri, Valentina; Amadori, Alberto; Conte, PierFranco; Indraccolo, Stefano; Bonanno, Laura
British journal of cancer, 07/2020, Letnik: 123, Številka: 1Journal Article
Liquid biopsy has the potential to monitor biological effects of treatment. KRAS represents the most commonly mutated oncogene in Caucasian non-small-cell lung cancer (NSCLC). The aim of this study was to explore association of dynamic plasma KRAS genotyping with outcome in advanced NSCLC patients. Advanced NSCLC patients were prospectively enrolled. Plasma samples were collected at baseline (T1), after 3 or 4 weeks, according to treatment schedule (T2) and at first radiological restaging (T3). Patients carrying KRAS mutation in tissue were analysed in plasma with droplet digital PCR. Semi-quantitative index of fractional abundance of mutated allele (MAFA) was used. KRAS-mutated cohort included 58 patients, and overall 73 treatments (N = 39 chemotherapy and N = 34 immune checkpoint inhibitors) were followed with longitudinal liquid biopsy. Sensitivity of KRAS detection in plasma at baseline was 48.3% (95% confidence interval (CI): 35.0-61.8). KRAS mutation at T2 was associated with increased probability of experiencing progressive disease as best radiological response (adjusted odds ratio: 7.3; 95% CI: 2.1-25.0, p = 0.0016). Increased MAFA (T1-T2) predicted shorter progression-free survival (adjusted hazard ratio (HR): 2.1; 95% CI: 1.2-3.8, p = 0.0142) and overall survival (adjusted HR: 3.2; 95% CI: 1.2-8.4, p = 0.0168). Longitudinal analysis of plasma KRAS mutations correlated with outcome: its early assessment during treatment has great potentialities for monitoring treatment outcome in NSCLC patients.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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