1. Prognostic value of circulating tumour DNA in metastatic pancreatic cancer patients: post-hoc analyses of two clinical trials
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Aurélien de Reyniès, Claire Mulot, Laetitia Dahan, Jean-Baptiste Bachet, Shu-Fang Wang-Renault, Valérie Taly, Jean-Marc Phelip, Pierre Laurent-Puig, Daniel Pietrasz, Yves Rinaldi, Julien Taieb, Jerome Durand-Labrunie, Hélène Blons, Solene Doat, Mathilde Postel, Karine Le Malicot, Centre de Recherche des Cordeliers (CRC (UMR_S_1138 / U1138)), École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Université Paris Cité (UPCité), Centre Hépato-Biliaire [Hôpital Paul Brousse] (CHB), Hôpital Paul Brousse-Assistance Publique - Hôpitaux de Paris, Cancer Research and Personalized Medicine - CARPEM [Paris], Hôpital Européen Georges Pompidou [APHP] (HEGP), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpitaux Universitaires Paris Ouest - Hôpitaux Universitaires Île de France Ouest (HUPO)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpitaux Universitaires Paris Ouest - Hôpitaux Universitaires Île de France Ouest (HUPO)-Hôpital Cochin [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Necker - Enfants Malades [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Hôpital de la Timone [CHU - APHM] (TIMONE), Fédération Francophone de Cancérologie Digestive (FFCD), Equipe EPICAD (LNC - U1231), Lipides - Nutrition - Cancer [Dijon - U1231] (LNC), Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Agro Dijon, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Agro Dijon, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Epigenetec, Centre de Ressources Biologiques (CRB), Hôpital Européen [Fondation Ambroise Paré - Marseille], CHU Saint-Etienne, CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Université Pierre et Marie Curie - Paris 6 (UPMC), (le programme) Cartes d'identité des tumeurs (CIT), Ligue Nationales Contre le Cancer (LNCC), and TALY, Valerie
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Male ,Oncology ,Cancer Research ,medicine.medical_specialty ,Multivariate analysis ,Post hoc ,medicine.medical_treatment ,[SDV.CAN]Life Sciences [q-bio]/Cancer ,Article ,Circulating Tumor DNA ,[SDV.CAN] Life Sciences [q-bio]/Cancer ,Internal medicine ,Metastatic pancreatic cancer ,Biomarkers, Tumor ,Humans ,Medicine ,Prospective Studies ,Neoplasm Metastasis ,Aged ,Chemotherapy ,Plasma samples ,business.industry ,Hazard ratio ,DNA Methylation ,Middle Aged ,Metastatic Pancreatic Adenocarcinoma ,Prognosis ,Pancreatic Neoplasms ,Survival Rate ,Clinical trial ,Mutation ,Female ,business - Abstract
International audience; Objective: The prognostication of metastatic pancreatic adenocarcinoma (mPDAC) patients remains uncertain, mainly based on carbohydrate antigen 19-9 (CA19-9), with limited utility. Circulating tumour DNA (ctDNA) has been suggested as a prognostic factor, but its added value has been poorly explored. The objective was to determine whether ctDNA is an independent factor for the prognostication of mPDAC.Design: Translational study based on two prospective collections of plasma samples of mPDAC patients naïve for chemotherapy. One used as a test series and the other as validation series coming from two randomised trials (Prodige 35 and Prodige 37). CtDNA was assessed by digital droplet PCR targeting two methylated markers (HOXD8 and POU4F1) according to a newly developed and validated method. Univariate and multivariate analyses were performed according to ctDNA status.Results: Of 372 plasma samples available, 354 patients were analyzed for survival. In the validation series, 145 of 255 patients were found ctDNA positive (56.8%), Median PFS and OS were 5.3 and 8.2 months in ctDNA-positive and 6.2 and 12.6 months in ctDNA-negative patients, respectively. ctDNA positivity was more often associated with young age, high CA19-9 level and neutrophils lymphocytes ratio. In multivariate analysis including these previous markers, ctDNA was confirmed as an independent prognostic marker for PFS (adjusted hazard ratio (HR) 1.5, CI 95% [1.03-2.18], p = 0.034) and OS (HR 1.62, CI 95% [1.05-2.5], p = 0.029).Conclusions: In this first ctDNA assessment in a large series of mPDAC derived from clinical trials, ctDNA was detectable in 56.8% of patients and confirmed as an independent prognostic marker.
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- 2022