1. In Adults with Ph-Negative Acute Lymphoblastic Leukemia (ALL), Age-Adapted Chemotherapy Intensity and MRD-Driven Transplant Indication Significantly Reduces Treatment-Related Mortality (TRM) and Improves Overall Survival - Results from the Graall-2014 Trial
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Nicolas Boissel, Francoise Huguet, Thibaut Leguay, Hunault-Berger Mathilde, Carlos Graux, Yves Chalandon, Eric Delabesse, Yosr Hicheri, Patrice Chevallier, Marie Balsat, Cedric Pastoret, Martine Escoffre-Barbe, Florence Pasquier, Jean-Pierre Marolleau, Anne Thiebaut-Bertrand, Anne Huynh, Nathalie Dhedin, Emilie Lemasle, Caroline Bonmati, Sébastien Maury, Gaëlle Guillerm, Anna Berceanu, Urs Schanz, Thomas Cluzeau, Pascal Turlure, Philippe Rousselot, Bernard J.M. De Prijck, Nathalie Grardel, Marie C Bene, Marine Lafage, Norbert Ifrah, Veronique Lheritier, Vahid Asnafi, Emmanuelle Clappier, Herve Dombret, Hopital Saint-Louis [AP-HP] (AP-HP), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Recherche clinique appliquée à l'hématologie (URP_3518), Université Paris Cité (UPCité), Institut de Recherche Saint-Louis - Hématologie Immunologie Oncologie (Département de recherche de l’UFR de médecine, ex- Institut Universitaire Hématologie-IUH) (IRSL), Institut Universitaire du Cancer de Toulouse - Oncopole (IUCT Oncopole - UMR 1037), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Universitaire de Toulouse (CHU Toulouse), CHU Bordeaux [Bordeaux], Centre Hospitalier Universitaire d'Angers (CHU Angers), PRES Université Nantes Angers Le Mans (UNAM), CHU UCL Namur, Hôpitaux Universitaires de Genève (HUG), Service Hématologie - IUCT-Oncopole [CHU Toulouse], Pôle Biologie [CHU Toulouse], Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Pôle IUCT [CHU Toulouse], Institut Paoli-Calmettes, Fédération nationale des Centres de lutte contre le Cancer (FNCLCC), Centre hospitalier universitaire de Nantes (CHU Nantes), Centre Hospitalier Lyon Sud [CHU - HCL] (CHLS), Hospices Civils de Lyon (HCL), CHU Pontchaillou [Rennes], Microenvironment and B-cells: Immunopathology,Cell Differentiation, and Cancer (MOBIDIC), Université de Rennes (UR)-Etablissement français du sang [Rennes] (EFS Bretagne)-Institut National de la Santé et de la Recherche Médicale (INSERM), Dynamique moléculaire de la transformation hématopoïétique (Dynamo), Institut Gustave Roussy (IGR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris-Saclay, Institut Gustave Roussy (IGR), CHU Amiens-Picardie, Centre Hospitalier Universitaire [Grenoble] (CHU), Centre de Lutte Contre le Cancer Henri Becquerel Normandie Rouen (CLCC Henri Becquerel), Centre Hospitalier Régional Universitaire de Nancy (CHRU Nancy), Hôpital Henri Mondor, Centre Hospitalier Régional Universitaire de Brest (CHRU Brest), Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon), University hospital of Zurich [Zurich], Centre Hospitalier Universitaire de Nice (CHU Nice), Université Côte d'Azur (UCA), CHU Limoges, Centre Hospitalier de Versailles André Mignot (CHV), CHU Sart Tilman [Liege, Belgium], CHU Lille, Hôpital de la Timone [CHU - APHM] (TIMONE), Aix Marseille Université (AMU), CHU d'Angers [Département Urgences], PRES Université Nantes Angers Le Mans (UNAM)-PRES Université Nantes Angers Le Mans (UNAM), Coordination du Groupe GRAALL [CH Lyon-Sud], Hospices Civils de Lyon (HCL)-Hospices Civils de Lyon (HCL), Institut Necker Enfants-Malades (INEM - UM 111 (UMR 8253 / U1151)), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), CHU Necker - Enfants Malades [AP-HP], Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Institut National de la Santé et de la Recherche Médicale (INSERM), and DESSAIVRE, Louise
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[SDV.MHEP] Life Sciences [q-bio]/Human health and pathology ,Immunology ,Cell Biology ,Hematology ,Biochemistry ,[SDV.MHEP]Life Sciences [q-bio]/Human health and pathology - Abstract
International audience; Background During the 2005-2014 period, the GRAALL conducted the GRAALL-2005 trial in patients (pts) with Philadelphia chromosome (Ph)-negative ALL aged 18-59y. In this trial, all pts received a pediatric-inspired chemotherapy, whatever their age. Post-hoc analysis revealed an unacceptable TRM in pts aged 45-59y (Huguet et al. J Clin Oncol 2018; 36:2514-23). Allogeneic hematopoietic stem cell transplantation (HSCT) was offered in first complete remission (CR) to most CR pts, defined at high-risk (HR) by at least one baseline clinical or biological HR factor (CNS involvement, complex karyotype [≥5 abns.], low hypodiploidy/near triploidy, poor early blast clearance, late CR, as well as WBC ≥ 30x109/L, lack of CD10 expression, KMT2A rearrangement or TCF3::PBX1 fusion for B-cell precursor [BCP] ALL). Minimal residual disease (MRD) response was not considered for HSCT indication at that time.In the next GRAALL-2014 trial conducted in a similar population, we introduced two major changes in the treatment strategy. First, chemotherapy intensity (steroids, anthracycline and L-asparaginase) was reduced in pts aged 45-59y to decrease excessive TRM. Secondly, the indication for HSCT was modified, relying on IG/TR MRD response only (post-induction MRD ≥10-3 and/or post-consolidation MRD ≥10-4) while not on any former baseline HR criterion. Here, we compare the outcomes of the two trials, focusing on the impact of these two major evolutions.Patients & Methods A total of 743 pts treated in the GRAALL-2014 trial between 2015 and 2020 were compared to the 787 pts from the historical GRAALL-2005 trial, in terms of CR and induction death rates, rate of HSCT in CR1, cumulative incidence of TRM (CITRM) and relapse (CIR), relapse-free (RFS) and overall (OS) survival. It should be noted that two nested Phase 2 trials were introduced by amendment during the GRAALL-2014 course (in 2017 and 2018, respectively), aiming to evaluate post-remission addition of nelarabine and blinatumomab in 87 T-ALL and 94 BCP-ALL selected pts, respectively.Results Main patient characteristics, including age, gender, BCP/T-ALL, WBC, and historical baseline HR features, did not significantly differ between the two trial cohorts, even if CNS disease at diagnosis was more frequent in the 2014 cohort (12 vs 7%, p= 0.001).Outcome comparisons are shown in Table 1. Overall, the induction death rate was significantly reduced in the GRAALL-2014 (3 vs 6%, p= 0.005). As expected, this was only observed in pts aged 44-59y (3 vs 11%, p= 0.001), in whom dose-intensity reduction also translated into a higher need for second induction course (9 vs 5%, p= 0.05) eventually resulting in a higher CR rate (92 vs 86%, p= 0.05). Due to the newly introduced MRD-based stratification, the rate of pts with HSCT indication was markedly reduced (30 vs 65%, p
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- 2022