LBA03-11 CLINICAL UTILITY OF SERIAL CELL-FREE DNA ANALYSIS FOR MONITORING MUSCLE-INVASIVE BLADDER CANCER PATIENTS

Abstract

You have accessJournal of UrologyCME1 Apr 2023LBA03-11 CLINICAL UTILITY OF SERIAL CELL-FREE DNA ANALYSIS FOR MONITORING MUSCLE-INVASIVE BLADDER CANCER PATIENTS Lourdes Mengual, Raquel Carrasco, Mercedes Ingelmo-Torres, Ascensión Gómez, Ramón Trullas, Fiorella L. Roldán, Tarek Ajami, Joan Sureda, Sandra Herranz, Antonio Alcaraz, and Laura Izquierdo Lourdes MengualLourdes Mengual More articles by this author , Raquel CarrascoRaquel Carrasco More articles by this author , Mercedes Ingelmo-TorresMercedes Ingelmo-Torres More articles by this author , Ascensión GómezAscensión Gómez More articles by this author , Ramón TrullasRamón Trullas More articles by this author , Fiorella L. RoldánFiorella L. Roldán More articles by this author , Tarek AjamiTarek Ajami More articles by this author , Joan SuredaJoan Sureda More articles by this author , Sandra HerranzSandra Herranz More articles by this author , Antonio AlcarazAntonio Alcaraz More articles by this author , and Laura IzquierdoLaura Izquierdo More articles by this author View All Author Informationhttps://doi.org/10.1097/JU.0000000000003426.11AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: Cell-free DNA (cfDNA) has recently emerged as a real-time biomarker for diagnosis, monitoring and predicting therapy response of tumoral disease. Our aim was to evaluate cfDNA as a prognostic biomarker for monitoring muscle-invasive bladder cancer (MIBC) patients after radical cystectomy (RC) at different follow-up time points. METHODS: Blood samples from 37 MIBC patients who underwent RC and extended lymphadenectomy in our center were collected at cystectomy and one, four, 12 and 24 months later. cfDNA from plasma samples was quantified and fragmentation patterns were analyzed. Four mutations previously identified in BC tissue from these patients were studied in cfDNA samples by droplet digital PCR to identify presence of circulating tumor DNA (ctDNA) during patients’ follow-up. RESULTS: During a median follow-up of 36 months, 17 (46%) patients progressed and 14 (38%) died due to the BC. The median time to progression and cancer-specific survival (CSS) were 10 and 16 months, respectively. cfDNA level was significantly higher in progressive than non-progressive MIBC patients 12 months after RC (p=0.045). Of note, cfDNA level and ctDNA status four months after RC were identified as independent prognostic biomarkers of tumor progression (HR 5.290; p=0.033) and CSS (HR 4.199; p=0.038), respectively. By contrast, no correlation was found between cfDNA fragmentation and tumor progression nor CSS. ctDNA status detected tumor progression with a median anticipation period of 6 months compared with imaging techniques (p=0.024). Furthermore, ctDNA clearance four months after RC was significantly associated with patients’ clinical outcomes (p=0.033). CONCLUSIONS: cfDNA levels and ctDNA status four months after RC are prognostic biomarkers of tumor progression and CSS in MIBC patients. In addition, cfDNA monitoring is useful to predict patient outcomes after RC. The implementation of cfDNA analysis in the clinical setting could have an impact on disease management since patients could benefit from early treatment. Source of Funding: This work was supported by the Instituto de Salud Carlos III (ISCIII), project reference number PI17/01343 © 2023 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 209Issue Supplement 4April 2023Page: e1196 Advertisement Copyright & Permissions© 2023 by American Urological Association Education and Research, Inc.MetricsAuthor Information Lourdes Mengual More articles by this author Raquel Carrasco More articles by this author Mercedes Ingelmo-Torres More articles by this author Ascensión Gómez More articles by this author Ramón Trullas More articles by this author Fiorella L. Roldán More articles by this author Tarek Ajami More articles by this author Joan Sureda More articles by this author Sandra Herranz More articles by this author Antonio Alcaraz More articles by this author Laura Izquierdo More articles by this author Expand All Advertisement PDF downloadLoading ...