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- W2553710623 abstract "// Rodrigo A. Toledo 1,4,* , Antonio Cubillo 1,2,* , Estela Vega 1,2 , Elena Garralda 1,2 , Rafael Alvarez 1,2 , Lisardo U. de la Varga 1,2 , Jesús R. Pascual 1,2 , Gema Sánchez 1,4 , Francesca Sarno 1,4 , Susana H. Prieto 3 , Sofía Perea 1,4 , Pedro P. Lopéz-Casas 4 , Fernando López-Ríos 3 and Manuel Hidalgo 4,5 1 Centro Integral Oncológico Clara Campal (CIOCC), Madrid, Spain 2 Universidad San Pablo CEU, Madrid, Spain 3 Laboratorio de Dianas Terapeúticas, Madrid, Spain 4 Spanish National Cancer Research Centre (CNIO), Madrid, Spain 5 Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA * These authors have contributed equally to this manuscript Correspondence to: Rodrigo A. Toledo, email: // Manuel Hidalgo, email: // Keywords : colorectal cancer, cfDNA, liquid biopsy, anti-EGFR, cetuximab Received : October 13, 2016 Accepted : October 24, 2016 Published : November 11, 2016 Abstract Cancer genomics and translational medicine rely on the molecular profiling of patient’s tumor obtained during surgery or biopsy. Alternatively, blood is a less invasive source of tumor DNA shed, amongst other ways, as cell-free DNA (cfDNA). Highly-sensitive assays capable to detect cancer genetic events from patient’s blood plasma became popularly known as liquid biopsy (LqB). Importantly, retrospective studies including small number of selected patients with metastatic colorectal cancer (mCRC) patients treated with anti-EGFR therapy have shown LqB capable to detect the acquired clonal mutations in RAS genes leading to therapy resistance. However, the usefulness of LqB in the real-life clinical monitoring of these patients still lack additional validation on controlled studies. In this context, we designed a prospective LqB clinical trial to monitor newly diagnosed KRAS wild-type (wt) mCRC patients who received a standard FOLFIRI-cetuximab regimen. We used BEAMing technique for evaluate cfDNA mutations in KRAS , NRAS, BRAF, and PIK3CA in twenty-five patients during a 2-y period. A total of 2,178 cfDNA mutation analyses were performed and we observed that: a) continued wt circulating status was correlated with a prolonged response; b) smoldering increases in mutant cfDNA were correlated with acquired resistance; while c) mutation upsurge/explosion anticipated a remarkable clinical deterioration. The current study provides evidences, obtained for the first time in an unbiased and prospective manner, that reinforces the utility of LqB for monitoring mCRC patients." @default.
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- W2553710623 date "2016-11-11" @default.
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- W2553710623 title "Clinical validation of prospective liquid biopsy monitoring in patients with wild-type RAS metastatic colorectal cancer treated with FOLFIRI-cetuximab" @default.
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- W2553710623 doi "https://doi.org/10.18632/oncotarget.13311" @default.
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