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1. Primary plasma cell leukemias displaying t(11;14) have specific genomic, transcriptional, and clinical features

Author

Titouan Cazaubiel, Xavier Leleu, Aurore Perrot, Salomon Manier, Laure Buisson, Sabrina Maheo, Laura Do Souto Ferreira, Romain Lannes, Luka Pavageau, Cyrille Hulin, Jean-Pierre Marolleau, Laurent Voillat, Karim Belhadj, Marion Divoux, Borhane Slama, Sabine Brechignac, Margaret Macro, Anne-Marie Stoppa, Laurence Sanhes, Frédérique Orsini-Piocelle, Jean Fontan, Marie-Lorraine Chretien, Hélène Demarquette, Mohamad Mohty, Anais Schavgoulidze, Herve Avet-Loiseau, Jill Corre, Service d'Hématologie [CHU Poitiers], Centre hospitalier universitaire de Poitiers (CHU Poitiers), Service d'Hématologie [IUCT Toulouse], Université Fédérale Toulouse Midi-Pyrénées-Institut Universitaire du Cancer de Toulouse - Oncopole (IUCT Oncopole - UMR 1037), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM), CHU de Lille, Service des maladies du sang, Centre de Recherches en Cancérologie de Toulouse (CRCT), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut Universitaire du Cancer de Toulouse - Oncopole (IUCT Oncopole - UMR 1037), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Hôpital Haut-Lévêque [CHU Bordeaux], CHU Bordeaux [Bordeaux], CHU Amiens-Picardie, HEMATIM - Hématopoïèse et immunologie - UR UPJV 4666 (HEMATIM), Université de Picardie Jules Verne (UPJV)-CHU Amiens-Picardie-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Chalon-sur-Saône William Morey, Hôpital Henri Mondor, Université de Lorraine (UL), Avignon Université (AU), Hôpital Avicenne [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), CHU Caen, Normandie Université (NU)-Tumorothèque de Caen Basse-Normandie (TCBN), Service d’Hématologie [Institut Paoli Calmettes, Marseille], Institut Paoli-Calmettes, Fédération nationale des Centres de lutte contre le Cancer (FNCLCC)-Fédération nationale des Centres de lutte contre le Cancer (FNCLCC), Centre Hospitalier Saint Jean de Perpignan, Centre Hospitalier Annecy-Genevois [Saint-Julien-en-Genevois], Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon), Service d'Hématologie Clinique (CHU de Dijon), Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon), Hôpital Claude Huriez [Lille], CHU Lille, CHU Saint-Antoine [AP-HP], Centre de Recherche Saint-Antoine (CRSA), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU), Centre Hospitalier Universitaire de Purpan (CHU Purpan), and CHU Toulouse [Toulouse]

Subjects
Chromosome Aberrations, [SDV]Life Sciences [q-bio], Immunology, Humans, Cell Biology, Hematology, Genomics, Multiple Myeloma, Prognosis, Transcriptome, Biochemistry, Leukemia, Plasma Cell
Abstract

Primary plasma cell leukemia (pPCL) is an aggressive form of multiple myeloma (MM) that has not benefited from recent therapeutic advances in the field. Because it is very rare and heterogeneous, it remains poorly understood at the molecular level. To address this issue, we performed DNA and RNA sequencing of sorted plasma cells from a large cohort of 90 newly diagnosed pPCL and compared with MM. We observed that pPCL presents a specific genomic landscape with a high prevalence of t(11;14) (about half) and high-risk genomic features such as del(17p), gain 1q, and del(1p32). In addition, pPCL displays a specific transcriptome when compared with MM. We then wanted to characterize specifically pPCL with t(11;14). We observed that this subentity displayed significantly fewer adverse cytogenetic abnormalities. This translated into better overall survival when compared with pPCL without t(11;14) (39.2 months vs 17.9 months, P = .002). Finally, pPCL with t(11;14) displayed a specific transcriptome, including differential expression of BCL2 family members. This study is the largest series of patients with pPCL reported so far.

Published
2022
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2. Eomes-Dependent Loss of the Co-activating Receptor CD226 Restrains CD8+ T Cell Anti-tumor Functions and Limits the Efficacy of Cancer Immunotherapy

Author

Stanislas Goriely, Marie-Véronique Joubert, Tobias Bald, Mark J. Smyth, Ludovic Martinet, Elena Morandi, Loïc Dupré, Laure Buisson, Nadège Carrié, Marianne Weulersse, Guillaume Gaud, Marie Le Moine, Thomas Gossye, Anne Dejean, Hervé Avet-Loiseau, Ashmitha Sundarrajan, Assia Asrir, Andrea C. Pichler, Michaël Pérès, Abdelhadi Saoudi, Alejandra Martinez, Julien Mazieres, Sahar Kassem, Elisa Brauns, Els Verhoeyen, Indrajit Das, Sabrina Maheo, Matthias Braun, Vera Pancaldi, Clara Maria Scarlata, Marine Cuisinier, Maha Ayyoub, Laura Do Souto, Lea Lemaitre, Arantxa Agesta, Camille Guillerey, Centre de Recherches en Cancérologie de Toulouse (CRCT), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), QIMR Berghofer Medical Research Institute, Institut Universitaire du Cancer de Toulouse - Oncopole (IUCT Oncopole - UMR 1037), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM), Université libre de Bruxelles (ULB), Centre de Physiopathologie Toulouse Purpan (CPTP), Centre méditerranéen de médecine moléculaire (C3M), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Côte d'Azur (UCA), Centre International de Recherche en Infectiologie - UMR (CIRI), Institut National de la Santé et de la Recherche Médicale (INSERM)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases (LBI-RUD), Barcelona Supercomputing Center - Centro Nacional de Supercomputacion (BSC - CNS), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), 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), Université Nice Sophia Antipolis (1965 - 2019) (UNS), Centre International de Recherche en Infectiologie (CIRI), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), and Centre de Physiopathologie Toulouse Purpan ex IFR 30 et IFR 150 (CPTP)

Subjects
0301 basic medicine, MESH: Neoplasms / immunology, 8 Supplementary Figures, Lymphocyte, medicine.medical_treatment, [SDV]Life Sciences [q-bio], MESH: Programmed Cell Death 1 Receptor / immunology, CD226 (DNAM-1), MESH: Receptors, Antigen, T-Cell / immunology, MESH: Neoplasms / therapy, TCR signaling, 0302 clinical medicine, Cancer immunotherapy, MESH: Tumor Necrosis Factor Receptor Superfamily, Member 9 / immunology, Immunology and Allergy, Cytotoxic T cell, MESH: Animals, ComputingMilieux_MISCELLANEOUS, T cell exhaustion, MESH: Signal Transduction / immunology, MESH: CD8-Positive T-Lymphocytes / immunology, 3. Good health, Infectious Diseases, medicine.anatomical_structure, [SDV.IMM.IA]Life Sciences [q-bio]/Immunology/Adaptive immunology, 030220 oncology & carcinogenesis, Immunotherapy, MESH: Transcriptome / immunology, Immunology, Eomesodermin, 8 Figures, Biology, MESH: Antigens, Differentiation, T-Lymphocyte / immunology, Co-stimulation, 03 medical and health sciences, tumor immune escape, MESH: Mice, Inbred C57BL, MESH: Immune Checkpoint Inhibitors / immunology, medicine, MESH: Tumor Microenvironment / immunology, MESH: Mice, 96 References CD8 + T lymphocytes, Tumor microenvironment, MESH: Humans, immune checkpoint blockade, MESH: T-Box Domain Proteins / immunology, Immune checkpoint, MESH: Immunotherapy / methods, Sciences biomédicales, 030104 developmental biology, Cancer research, CD8
Abstract

Through complementary approaches, involving cancer patients’ samples and relevant mouse tumor models, Weulersse et al. reveal that CD8 T cells in the tumor microenvironment lose expression of the activating receptor CD226 (DNAM-1) in a manner that is Eomes dependent. CD226 loss restrains CD8 T cell function and limits the efficacy of cancer immunotherapy.CD8 T cells within the tumor microenvironment (TME) are exposed to various signals that ultimately determine functional outcomes. Here, we examined the role of the co-activating receptor CD226 (DNAM-1) in CD8 T cell function. The absence of CD226 expression identified a subset of dysfunctional CD8 T cells present in peripheral blood of healthy individuals. These cells exhibited reduced LFA-1 activation, altered TCR signaling, and a distinct transcriptomic program upon stimulation. CD226 CD8 T cells accumulated in human and mouse tumors of diverse origin through an antigen-specific mechanism involving the transcriptional regulator Eomesodermin (Eomes). Despite similar expression of co-inhibitory receptors, CD8 tumor-infiltrating lymphocyte failed to respond to anti-PD-1 in the absence of CD226. Immune checkpoint blockade efficacy was hampered in Cd226 mice. Anti-CD137 (4-1BB) agonists also stimulated Eomes-dependent CD226 loss that limited the anti-tumor efficacy of this treatment. Thus, CD226 loss restrains CD8 T cell function and limits the efficacy of cancer immunotherapy.

Published
2020
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3. Minimal residual disease negativity using deep sequencing is a major prognostic factor in multiple myeloma

Author

Philippe Moreau, Laurent Garderet, Bertrand Arnulf, Sabrina Maheo, Lotfi Benboubker, Mamoun Dib, Sabine Brechignac, Nelly Robillard, Mohamad Mohty, Margaret Macro, Brigitte Pegourie, Thierry Facon, Brigitte Kolb, Karim Belhadj, Nikhil C. Munshi, Bruno Royer, Olivier Decaux, Arnaud Jaccard, Valérie Lauwers-Cances, Marie-Lorraine Chretien, Anne-Marie Stoppa, Hervé Avet-Loiseau, Xavier Leleu, Kenneth C. Anderson, Jean-Richard Eveillard, Martin Moorhead, Chantal Doyen, Cecile Fohrer, Lionel Karlin, Jill Corre, Victoria Carlton, Paul G. Richardson, Malek Faham, Jean-Luc Harousseau, Michel Attal, Nathalie Meuleman, Thomas D. Willis, Aurore Perrot, Cyrille Hulin, Thomas Dejoie, Service d'Hématologie [CHRU Nancy], Centre Hospitalier Régional Universitaire de Nancy (CHRU Nancy), Service d'épidémiologie [Toulouse], CHU Toulouse [Toulouse], Centre de Recherches en Cancérologie de Toulouse (CRCT), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Université Fédérale Toulouse Midi-Pyrénées, Service d'Hématologie Biologique [CHU Nantes], Centre hospitalier universitaire de Nantes (CHU Nantes), Dpt hématologie [CHU Bordeaux], CHU Bordeaux [Bordeaux], Service d'Hématologie Clinique (CHU de Dijon), Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon), Laboratoire de Biochimie [Nantes], Service d’Hématologie [Institut Paoli Calmettes, Marseille], Institut Paoli-Calmettes, Fédération nationale des Centres de lutte contre le Cancer (FNCLCC)-Fédération nationale des Centres de lutte contre le Cancer (FNCLCC), Centre Hospitalier Universitaire [Grenoble] (CHU), Service d'hématologie [Centre Hospitalier Lyon Sud - HCL], Centre Hospitalier Lyon Sud [CHU - HCL] (CHLS), Hospices Civils de Lyon (HCL)-Hospices Civils de Lyon (HCL), CHU Saint-Antoine [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Institut Jules Bordet [Bruxelles], Faculté de Médecine [Bruxelles] (ULB), Université libre de Bruxelles (ULB)-Université libre de Bruxelles (ULB), Laboratoire d'Hématologie [CHU Amiens], CHU Amiens-Picardie, CHRU Brest - Service d'Hématologie (CHU-Brest-Hemato), Centre Hospitalier Régional Universitaire de Brest (CHRU Brest), Service d'hématologie [Tours], Centre Hospitalier Régional Universitaire de Tours (CHRU Tours)-Hôpital Bretonneau, Service d'hématologie [Angers], Centre Hospitalier Universitaire d'Angers (CHU Angers), PRES Université Nantes Angers Le Mans (UNAM)-PRES Université Nantes Angers Le Mans (UNAM), Service d’Hématologie Clinique [Rennes], CHU Pontchaillou [Rennes], Service d'Hématologie clinique et thérapie cellulaire [CHU Limoges], CHU Limoges, Service d'Hématologie Biologique, Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Henri Mondor-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Hôpital Universitaire de Bobigny, Service d'hématologie [Reims], Hôpital Robert Debré, Hôpital Robert Debré-Centre Hospitalier Universitaire de Reims (CHU Reims)-Hôpital Robert Debré-Centre Hospitalier Universitaire de Reims (CHU Reims), Institut Universitaire du Cancer de Toulouse - Oncopole (IUCT Oncopole - UMR 1037), CHU Toulouse [Toulouse]-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre de Recherche en Cancérologie Nantes-Angers (CRCNA), PRES Université Nantes Angers Le Mans (UNAM)-PRES Université Nantes Angers Le Mans (UNAM)-Hôtel-Dieu de Nantes-Institut National de la Santé et de la Recherche Médicale (INSERM)-Hôpital Laennec-Centre National de la Recherche Scientifique (CNRS)-Faculté de Médecine d'Angers-Centre hospitalier universitaire de Nantes (CHU Nantes), Hôpital Universitaire de Caen, Department of Energy / Joint Genome Institute (DOE), Los Alamos National Laboratory (LANL), Département d'Hématologie Clinique [CHU Nantes], Département d'Hématologie [CHU Poitiers], Centre hospitalier universitaire de Poitiers (CHU Poitiers), Département d'Hématologie [CHRU Lille], Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Département d'Hématologie [CHU Nantes], Service d'Hématologie [IUCT Toulouse], Université Fédérale Toulouse Midi-Pyrénées-Institut Universitaire du Cancer de Toulouse - Oncopole (IUCT Oncopole - UMR 1037), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Toulouse [Toulouse]-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM), Département d'Hématologie [IUCT Oncopole, Toulouse], Institut Universitaire du Cancer Toulouse - Oncopôle (IUCT), UCL - (MGD) Service d'hématologie, UCL - SSS/IREC/MONT - Pôle Mont Godinne, Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Département d'hématologie [CHU Saint-Antoine, AP-HP], AP-HP - Hôpital Saint-Antoine, Institut Jules Bordet, Service hématologie (CHU d'Amiens), Département d'Hématologie Clinique [CHU Rennes], Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Hôpital Henri Mondor-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre de Recherche en Cancérologie / Nantes - Angers (CRCNA), Centre hospitalier universitaire de Nantes (CHU Nantes)-Faculté de Médecine d'Angers-Centre Hospitalier Universitaire d'Angers (CHU Angers), PRES Université Nantes Angers Le Mans (UNAM)-PRES Université Nantes Angers Le Mans (UNAM)-Centre National de la Recherche Scientifique (CNRS)-Hôpital Laennec-Institut National de la Santé et de la Recherche Médicale (INSERM)-Hôtel-Dieu de Nantes, Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM), and Service d'Hématologie [CHU Toulouse]

Subjects
Male, 0301 basic medicine, Oncology, Neoplasm, Residual, Biochemistry, Dexamethasone, Bortezomib, Observations Lymphoid Neoplasia, 0302 clinical medicine, Maintenance therapy, Bone Marrow, hemic and lymphatic diseases, Antineoplastic Combined Chemotherapy Protocols, Lenalidomide, Multiple myeloma, Lymphoid Neoplasia, Hazard ratio, High-Throughput Nucleotide Sequencing, Hematology, Minimal Residual Disease Negativity, Middle Aged, Prognosis, 3. Good health, Survival Rate, 030220 oncology & carcinogenesis, Female, Multiple Myeloma, medicine.drug, medicine.medical_specialty, Plasma Cells, Immunology, [SDV.CAN]Life Sciences [q-bio]/Cancer, Disease-Free Survival, Maintenance Chemotherapy, 03 medical and health sciences, Internal medicine, medicine, Humans, Clinical Trials, Survival rate, Aged, business.industry, Cell Biology, medicine.disease, Minimal residual disease, Transplantation, 030104 developmental biology, business, Follow-Up Studies
Abstract

IF 15.132 (2017); International audience; The introduction of novel agents has led to major improvements in clinical outcomes for patients with multiple myeloma. To shorten evaluation times for new treatments, health agencies are currently examining minimal residual disease (MRD) as a surrogate end point in clinical trials. We assessed the prognostic value of MRD, measured during maintenance therapy by next-generation sequencing (NGS). MRD negativity was defined as the absence of tumor plasma cell within 1 000 000 bone marrow cells (

Published
2018
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4. The Genomic and Transcriptomic Landscape of Plasma Cell Leukemia

Author

Cyrille Hulin, Aurore Perrot, Jill Corre, Laura Do Souto Ferreira, Hervé Avet-Loiseau, Laure Buisson, Titouan Cazaubiel, Sabrina Maheo, and Romain Lannes

Subjects
Transcriptome, Plasma cell leukemia, Immunology, Cancer research, medicine, Cell Biology, Hematology, Biology, medicine.disease, Biochemistry
Abstract

Background: Primary plasma cell leukemia (pPCL) is a rare and aggressive form of multiple myeloma (MM) with an extremely poor prognosis and distinct biological and clinical features. Because of its low incidence and its heterogeneity, biological knowledge about pPCL is lacking especially molecular process responsible for its aggressiveness. Here, we took advantage of a large series of pPCL to describe the genomic and transcriptomic landscape of pPCL, to identify potential driver mutations and pathways, and to determine their clinical impacts. Methods: To address these issues, we performed a targeted DNA sequencing and a RNA sequencing of sorted bone marrow plasma cells collected at the time of diagnosis from 96 patients with pPCL between 2014 and 2020. We compared their genomic profiles with those of 907 MM at diagnosis previously obtained in our laboratory and their transcriptomic profiles with those of 300 MM at diagnosis obtained from the IFM2009/DFCI trial (NCT01191060). Copy number aberrations (CNA), single nucleotide variants (SNV), translocations, mutations, gene expression (GE) and gene set enrichment were analyzed and correlated with clinical information (overall survival and progression-free survival). Results: Genome analysis highlighted a specific genomic profile of pPCL. Indeed, hyperdiploid karyotypes were less frequent in pPCL compared with MM (20% vs 57%, p RNA-seq analysis showed also a specific transcriptional landscape of pPCL. Indeed, unsupervised hierarchical clustering of gene expression profiles demonstrated two distinct clusters between pPCL and MM. Gene set enrichment analysis identified a significantly higher expression of genes involved in MYC Targets and G2M checkpoint, and a significantly lower expression of genes involved in P53 pathway, hypoxia and TNF alpha signaling via NF-κB. Furthermore, pPCL with and without t(11;14) presented two distinct transcriptomic patterns, in particular for genes implicated in the apoptotic machinery. Three members of the BCL2 family were differentially expressed with BCL2 and PMAIP1 [NOXA] significantly overexpressed and BCL2L1 significantly underexpressed in pPCL with t(11;14). Median PFS and OS of patients with pPCL were respectively at 11 and 15 months. Presence of TP53 mutations was associated with a significantly lower PFS (4 months, p Conclusion: To our knowledge, we present the study on the largest series of patients with pPCL. Our results provide new information on both genomic and transcriptomic landscape of pPCL. Despite their heterogeneity, pPCL present a specific mutational landscape with high prevalence of t(11;14) and high-risk genomic features. These results help to better understand oncogenicity and the aggressive behavior of pPCL and support the use of new treatment strategies such as BCL2 inhibitor (Venetoclax) for pPCL with t(11;14). Disclosures Perrot: Amgen, BMS/Celgene, Janssen, Sanofi, Takeda: Consultancy, Honoraria, Research Funding. Hulin:Celgene/Bristol-Myers Squibb, Janssen, GlaxoSmithKline, and Takeda: Honoraria.

Published
2020
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5. Variable BCL2/BCL2L1 ratio in multiple myeloma with t(11;14)

Author

Mehmet Kemal Samur, Hervé Avet-Loiseau, Mariateresa Fulciniti, Aurore Perrot, Nikhil C. Munshi, Jill Corre, Laure Buisson, Alice Cleynen, Michel Attal, Sabrina Maheo, Institut Montpelliérain Alexander Grothendieck (IMAG), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Jerome Lipper Multiple Myeloma Center [Boston, MA, USA], Harvard Medical School [Boston] (HMS)-Dana-Farber Cancer Institute [Boston], Nutrition-Génétique et Exposition aux Risques Environnementaux (NGERE), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lorraine (UL), Service d'Hématologie [CHRU Nancy], Centre Hospitalier Régional Universitaire de Nancy (CHRU Nancy), Centre de Recherches en Cancérologie de Toulouse (CRCT), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut de pharmacologie et de biologie structurale (IPBS), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Dana-Farber Cancer Institute [Boston, USA], Harvard Medical School [Boston] (HMS), CHU Toulouse [Toulouse], Dana-Farber Cancer Institute [Boston], Institut Universitaire du Cancer de Toulouse - Oncopole (IUCT Oncopole - UMR 1037), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire de Thérapie Cellulaire, EFS, Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées

Subjects
Male, 0301 basic medicine, Disease free survival, Immunology, bcl-X Protein, Chromosomal translocation, [SDV.CAN]Life Sciences [q-bio]/Cancer, Biology, Biochemistry, Disease-Free Survival, Translocation, Genetic, 03 medical and health sciences, Igh locus, 0302 clinical medicine, medicine, Humans, Letter to Blood, 10. No inequality, Survival rate, Multiple myeloma, ComputingMilieux_MISCELLANEOUS, Chromosomes, Human, Pair 14, Genetics, Extramural, Chromosomes, Human, Pair 11, Cell Biology, Hematology, medicine.disease, Survival Rate, 030104 developmental biology, Proto-Oncogene Proteins c-bcl-2, 030220 oncology & carcinogenesis, Female, Multiple Myeloma
Abstract

To the editor: Multiple myeloma (MM) is characterized by a large diversity of genetic abnormalities.[1][1][⇓][2]-[3][3] They can be classified in 3 categories: copy number changes, mutations, and translocations involving mainly the IGH gene at 14q32. Translocations are usually balanced

Published
2018
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6. Myeloma MRD by deep sequencing from circulating tumor DNA does not correlate with results obtained in the bone marrow

Author

Marie-Lorraine Chretien, Hervé Avet-Loiseau, Sabrina Maheo, Céline Mazzotti, Murielle Roussel, Laura Do Souto, Benjamin Hebraud, Salomon Manier, Laure Buisson, Cyrille Hulin, Aurore Perrot, Xavier Leleu, Michel Attal, Jill Corre, Centre de Recherches en Cancérologie de Toulouse (CRCT), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Service d'Hématologie [CHRU Nancy], Centre Hospitalier Régional Universitaire de Nancy (CHRU Nancy), Service d'Hématologie Clinique (CHU de Dijon), Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon), Service d'Hématologie [CHU Poitiers], Centre hospitalier universitaire de Poitiers (CHU Poitiers), Service d'Hématologie [Bordeaux], CHU Bordeaux [Bordeaux], Service d'Hématologie [CHRU Lille], Hôpital Claude Huriez-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Institut Universitaire du Cancer de Toulouse - Oncopole (IUCT Oncopole - UMR 1037), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM), Hôpital Claude Huriez [Lille], CHU Lille-CHU Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), and CHU Toulouse [Toulouse]-Université Toulouse III - Paul Sabatier (UT3)

Subjects
0301 basic medicine, Neoplasm, Residual, Plasma Cells, [SDV.CAN]Life Sciences [q-bio]/Cancer, Deep sequencing, Circulating Tumor DNA, 03 medical and health sciences, 0302 clinical medicine, Bone Marrow, hemic and lymphatic diseases, medicine, Biomarkers, Tumor, Neoplasm, Humans, Multiple myeloma, ComputingMilieux_MISCELLANEOUS, Extramural, business.industry, High-Throughput Nucleotide Sequencing, Hematology, Sequence Analysis, DNA, medicine.disease, Stimulus Report, V(D)J Recombination, 3. Good health, body regions, 030104 developmental biology, medicine.anatomical_structure, Circulating tumor DNA, 030220 oncology & carcinogenesis, Cancer research, Bone marrow, Immunoglobulin Gene Rearrangement, business, Multiple Myeloma
Abstract

Key Points There is no correlation between ctDNA and bone marrow for MRD by NGS using only immunoglobulin gene rearrangements in myeloma patients.

Published
2018
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7. Identification Rate of Myeloma-Specific Clonotypes in Multiple Diagnostic Sample Types from Patients with Multiple Myeloma Using Next-Generation Sequencing Method

Author

Kenneth C. Anderson, Jianbiao Zheng, Paul G. Richardson, Nikhil C. Munshi, Michel Attal, Sabrina Maheo, Malek Faham, Jill Corre, and Hervé Avet-Loiseau

Subjects
business.industry, Immunology, Ficoll, Cell Biology, Hematology, Immunoglobulin light chain, medicine.disease, Biochemistry, Peripheral blood mononuclear cell, Minimal residual disease, Leukemia, medicine.anatomical_structure, hemic and lymphatic diseases, Medicine, Bone marrow, Primer (molecular biology), business, Multiple myeloma
Abstract

Background: Recent reports support the prognostic importance of minimal residual disease (MRD) levels in multiple myeloma (MM) patients and suggest that novel methods for MRD assessment can play a role in the evolving MM treatment paradigm (Martinez-Lopez et al., Blood 2014). The application of next-generation sequencing (NGS)-based MRD assessment has been previously demonstrated in multiple lymphoid malignancies (Faham et al., Blood 2012; Ladetto et al., Leukemia 2013). NGS-based MRD assessment requires a diagnostic sample for initial identification of the myeloma clonotype. In order for this MRD assessment approach to be clinically practical, it must allow for analysis of a diverse set of diagnostic samples. In this study, we assessed the rate of myeloma clonotype identification in 6 sample types at diagnosis: bone marrow (BM) aspirate slides, RNA extracted from CD138+ plasma cells, methanol-fixed BM cells, BM mononuclear cells, RBC-lysed BM cells, and DNA extracted from small numbers of CD138+ plasma cells. Methods: Baseline samples were collected from 606 patients with MM. The following samples were provided at baseline: bone marrow aspirate (BMA) slides (164), RNA extracted from CD138+ plasma cells (402), methanol-fixed BM cells (30), BMA cell preparations using a Ficoll protocol (13), BMA cell preparations using an RBC lysis protocol (19), and DNA extracted from small numbers of CD138+ plasma cells (5). Samples with sufficient input DNA (>15ng) were included in the analysis, although this requirement was waived for samples from CD138+ cells. The Ficoll BMA cell preparations were divided into the mononuclear cell fraction and the lower Ficoll fraction, which is typically comprised of granulocytes and erythrocytes. Identification of myeloma clonotypes was performed using Sequenta's LymphoSIGHT™ method. Briefly, using universal primer sets, we amplified immunoglobulin heavy chain (IGH) and light chain (IGK) variable, diversity, and joining gene segments from genomic DNA. Amplified products were sequenced and analyzed using standardized algorithms for clonotype determination. Myeloma-specific clonotypes were identified for each patient based on their high-frequency (>5%) within the B-cell repertoire. Results: The NGS assay identified a high-frequency myeloma clonotype in 555/606 (92%) of patients with MM. Myeloma clonotype identification rates were 141/164 (86%) in BMA slides, 375/402 (93%) in RNA extracted from CD138+ plasma cells, 30/30 (100%) in methanol cell preparations, 13/13 (100%) in Ficoll cell preparations, 18/19 (95%) in RBC lysis cell preparations, and 5/5 (100%) using small amounts of input CD138+ DNA (approximately 5000 cells). These applicability rates are consistent with previous reports of sequencing applicability in MM patients. In thirteen patients, we investigated the potential loss of myeloma-specific clonotypes due to Ficoll cell preparation. The variation in myeloma cell loss was typically low but ranged from essentially no loss to the loss of more than 90% of the myeloma cells in the PBMC of one patient compared to the RBC lysis preparation. The myeloma cells were detected in the typically discarded lower layer of the Ficoll preparation which explained the loss. Conclusions: These results suggest that sequencing based MRD analysis is applicable in >90% of patients with MM. Multiple sample types, including archived BMA slides, can be used for identification of the myeloma clonotype. Further evaluation and optimization of sample processing methods is ongoing to enable application of the sequencing method for clinical MRD assessment in MM patients. Disclosures Zheng: Sequenta, Inc.: Employment, Equity Ownership. Faham:Sequenta, Inc.: Employment, Equity Ownership, Membership on an entity's Board of Directors or advisory committees. Munshi:Celgene: Consultancy; Onyx: Consultancy; Janssen: Consultancy; Sanofi-Aventi: Consultancy; Oncopep: Consultancy, Equity Ownership, Patents & Royalties.

8. α,β-D-constrained nucleic acids are strong terminators of thermostable DNA polymerases in polymerase chain reaction.

Author

Olivier Martínez, Vincent Ecochard, Sabrina Mahéo, Grégori Gross, Pierre Bodin, Justin Teissié, Jean-Marc Escudier, and Laurent Paquereau

Subjects
Medicine, Science
Abstract

(S(C5'), R(P)) α,β-D- Constrained Nucleic Acids (CNA) are dinucleotide building blocks that can feature either B-type torsional angle values or non-canonical values, depending on their 5'C and P absolute stereochemistry. These CNA are modified neither on the nucleobase nor on the sugar structure and therefore represent a new class of nucleotide with specific chemical and structural characteristics. They promote marked bending in a single stranded DNA so as to preorganize it into a loop-like structure, and they have been shown to induce rigidity within oligonucleotides. Following their synthesis, studies performed on CNA have only focused on the constraints that this family of nucleotides introduced into DNA. On the assumption that bending in a DNA template may produce a terminator structure, we investigated whether CNA could be used as a new strong terminator of polymerization in PCR. We therefore assessed the efficiency of CNA as a terminator in PCR, using triethylene glycol phosphate units as a control. Analyses were performed by denaturing gel electrophoresis and several PCR products were further analysed by sequencing. The results showed that the incorporation of only one CNA was always skipped by the polymerases tested. On the other hand, two CNA units always stopped proofreading polymerases, such as Pfu DNA polymerase, as expected for a strong replication terminator. Non-proofreading enzymes, e.g. Taq DNA polymerase, did not recognize this modification as a strong terminator although it was predominantly stopped by this structure. In conclusion, this first functional use of CNA units shows that these modified nucleotides can be used as novel polymerization terminators of proofreading polymerases. Furthermore, our results lead us to propose that CNA and their derivatives could be useful tools for investigating the behaviour of different classes of polymerases.

Published
2011
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