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1. Gravitational stress during parabolic flights reduces the number of circulating innate and adaptive leukocyte subsets in human blood.

Author

Ulrik Stervbo, Toralf Roch, Tina Kornprobst, Birgit Sawitzki, Gerald Grütz, Andreas Wilhelm, Francis Lacombe, Kaoutar Allou, Markus Kaymer, Antoine Pacheco, Jacques Vigne, Timm H Westhoff, Felix S Seibert, and Nina Babel

Subjects
Medicine, Science
Abstract

Gravitational stress occurs during space flights or certain physical activities including extreme sports, where the change in experienced gravitational acceleration can reach large magnitudes. These changes include reduction and increase in the physical forces experienced by the body and may potentially induce pathogenic alterations of physiological processes. The immune system is known to regulate most functions in the human organism and previous studies suggest an impairment of the immune function under gravitational stress. However, systematic studies aiming to investigate the effect of gravitational stress on cellular immune response in humans are lacking. Since parabolic flights are considered as feasible model to investigate a short-term impact of gravitational changes, we evaluated the influence of gravitational stress on the immune system by analyzing leukocyte numbers before and after parabolic flight maneuvers in human blood. To correct for circadian effects, samples were taken at the corresponding time points on ground the day before the flight. The parabolic flight maneuvers led to changes in numbers of different leukocyte subsets. Naïve and memory T and B cell subsets decreased under gravitational stress and lower numbers of basophils and eosinophils were observed. Only circulating neutrophils increased during the parabolic flight. The observed changes could not be attributed to stress-induced cortisol effects, since cortisol levels were not affected. Our data demonstrate that the gravitational stress by parabolic flights can affect all parts of the human immune system. Consequently, it is possible that gravitational stress can have clinically relevant impacts on the control of immune responses.

Published
2018
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2. Clinical features and course of refractory anemia with ring sideroblasts associated with marked thrombocytosis

Author

Julien Broseus, Lourdes Florensa, Esther Zipperer, Susanne Schnittger, Luca Malcovati, Steven Richebourg, Eric Lippert, Jaroslav Cermak, Jyoti Evans, Morgane Mounier, José Maria Raya, François Bailly, Norbert Gattermann, Torsten Haferlach, Richard Garand, Kaoutar Allou, Carlos Besses, Ulrich Germing, Claudia Haferlach, Erica Travaglino, Elisa Luno, Maria Angeles Pinan, Leonor Arenillas, Maria Rozman, Maria Luz Perez Sirvent, Bernardine Favre, Julien Guy, Esther Alonso, Nuhri Ahwij, Andrés Jerez, Sylvie Hermouet, Marc Maynadié, Mario Cazzola, and François Girodon

Subjects
Diseases of the blood and blood-forming organs, RC633-647.5
Abstract

Background Refractory anemia with ring sideroblasts associated with marked thrombocytosis was proposed as a provisional entity in the 2001 World Health Organization classification of myeloid neoplasms and also in the 2008 version, but its existence as a single entity is contested. We wish to define the clinical features of this rare myelodysplastic/myeloproliferative neoplasm and to compare its clinical outcome with that of refractory anemia with ring sideroblasts and essential thrombocythemia.Design and Methods We conducted a collaborative retrospective study across Europe. Our database included 200 patients diagnosed with refractory anemia with ring sideroblasts and marked thrombocytosis. For each of these patients, each patient diagnosed with refractory anemia with ring sideroblasts was matched for age and sex. At the same time, a cohort of 454 patients with essential thrombocythemia was used to compare outcomes of the two diseases.Results In patients with refractory anemia with ring sideroblasts and marked thrombocytosis, depending on the Janus Kinase 2 V617F mutational status (positive or negative) or platelet threshold (over or below 600×109/L), no difference in survival was noted. However, these patients had shorter overall survival and leukemia-free survival with a lower risk of thrombotic complications than did patients with essential thrombocythemia (P

Published
2012
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3. Verification of a quantitative method: complete blood count by flow cytometry, the HematoFlowTM system (Beckman Coulter)

Author

François Xavier Mahon, Jean-Philippe Vial, Inès Vergnolle, Kaoutar Allou, and Francis Lacombe

Subjects
medicine.medical_specialty, medicine.diagnostic_test, Computer science, Complete blood count, General Medicine, University hospital, Flow cytometry, 03 medical and health sciences, 0302 clinical medicine, Second line, medicine, Medical physics, Color flow, 030215 immunology
Abstract

The HematoFlow™ system is used in the hematology laboratory of the University Hospital of Bordeaux since July, 2011. The HematoFlow™ solution is the combination of a sample preparator (FP1000) and a 5 color flow cytometer (FC500) linked by a middleware (Remisol™). This system is used in second line when flags are activated by the hematology instrument and/or if the sample comes from the OncoHematology Department. Improvements in hematology disease diagnosis and follow-up were possible using this system. The laboratory has now entered in an accreditation procedure and needs to check this method in compliance with the COFRAC requirements.

Published
2016

4. Multicentric Standardized Flow Cytometry Routine Assessment of Patients With Sepsis to Predict Clinical Worsening

Author

Thomas Daix, Estelle Guerin, Elsa Tavernier, Emmanuelle Mercier, Valérie Gissot, Olivier Hérault, Jean-Paul Mira, Florence Dumas, Nicolas Chapuis, Christophe Guitton, Marie C. Béné, Jean-Pierre Quenot, Cindy Tissier, Julien Guy, Gaël Piton, Anne Roggy, Grégoire Muller, Éric Legac, Nicolas de Prost, Mehdi Khellaf, Orianne Wagner-Ballon, Rémi Coudroy, Elodie Dindinaud, Fabrice Uhel, Mikaël Roussel, Thomas Lafon, Robin Jeannet, Frédéric Vargas, Catherine Fleureau, Mickaël Roux, Kaoutar Allou, Philippe Vignon, Jean Feuillard, Bruno François, Adollës Di Vittorio, Sébastien Lachot, Marie-Thérèse Georget, Joelle Hanna, Cédric Bretonnière, Olivier Zambon, Laurent Nicolet, Noëlle Brule, Camille Debord, Yannick Le Bris, Nelly Robillard, Auguste Dargent, Anne Bretagnol, Armelle Mathonnet, Thierry Boulain, François Barbier, Dalila Benzekri, Isabelle Runge, Toufik Kamel, Jérôme Cecchini, Sabrina Bouyer, René Robert, Alexandre Ouattara, Centre d'Investigation Clinique de Limoges (CIC1435), CHU Limoges-Institut National de la Santé et de la Recherche Médicale (INSERM), CHU Limoges, Contrôle de la Réponse Immune B et des Lymphoproliférations (CRIBL), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut Génomique, Environnement, Immunité, Santé, Thérapeutique (GEIST), Université de Limoges (UNILIM)-Université de Limoges (UNILIM), CIC Tours, Hôpital Bretonneau-Université de Tours-Centre Hospitalier Régional Universitaire de Tours (CHRU Tours)-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Régional Universitaire de Tours (CHRU TOURS), CIC - Tours, Centre Hospitalier Régional Universitaire de Tours (CHRU Tours)-Institut National de la Santé et de la Recherche Médicale (INSERM), AP-HP - Hôpital Cochin Broca Hôtel Dieu [Paris], Paris-Centre de Recherche Cardiovasculaire (PARCC - UMR-S U970), Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Hôpital Européen Georges Pompidou [APHP] (HEGP), Hôpitaux Universitaires Paris Ouest - Hôpitaux Universitaires Île de France Ouest (HUPO)-Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Hôpitaux Universitaires Paris Ouest - Hôpitaux Universitaires Île de France Ouest (HUPO)-Assistance publique - Hôpitaux de Paris (AP-HP) (APHP), Institut de transplantation urologie-néphrologie (ITUN), Université de Nantes (UN)-Centre hospitalier universitaire de Nantes (CHU Nantes), Centre de Recherche en Transplantation et Immunologie (U1064 Inserm - CRTI), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN), Centre hospitalier universitaire de Nantes (CHU Nantes), Equipe LIPNESS (LNC - U1231) (LIPNESS), Lipides - Nutrition - Cancer [Dijon - U1231] (LNC), Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Service de Réanimation Médicale (CHU de Dijon), Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon), Centre d'Investigation Clinique 1432 (Dijon) - Epidemiologie Clinique/Essais Cliniques (CIC-EC), Université de Bourgogne (UB)-Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Marqueurs pronostiques et facteurs de régulations des pathologies cardiaques et vasculaires - UFC ( EA 3920) (PCVP / CARDIO), Centre Hospitalier Régional Universitaire [Besançon] (CHRU Besançon)-Université de Franche-Comté (UFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Centre Hospitalier Régional Universitaire [Besançon] (CHRU Besançon), Interactions hôte-greffon-tumeur, ingénierie cellulaire et génique - UFC (UMR INSERM 1098) (HOTE GREFFON), Université de Franche-Comté (UFC)-Etablissement français du sang [Bourgogne-France-Comté] (EFS [Bourgogne-France-Comté])-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire d'Excellence : Lipoprotéines et Santé : prévention et Traitement des maladies Inflammatoires et du Cancer (LabEx LipSTIC), Institut National de la Recherche Agronomique (INRA)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université Paris-Sud - Paris 11 (UP11)-École pratique des hautes études (EPHE)-Institut Gustave Roussy (IGR)-Centre Hospitalier Régional Universitaire de Nancy (CHRU Nancy)-Université de Bourgogne (UB)-Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon)-Centre Régional de Lutte contre le cancer - Centre Georges-François Leclerc (CRLCC - CGFL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Fédération Francophone de la Cancérologie Digestive, FFCD-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Etablissement français du sang [Bourgogne-France-Comté] (EFS [Bourgogne-France-Comté])-Centre National de la Recherche Scientifique (CNRS)-Centre Hospitalier Régional Universitaire [Besançon] (CHRU Besançon)-Université de Franche-Comté (UFC)-Université de Montpellier (UM), Réanimation Médicale [CHR d'Orléans], Centre Hospitalier Régional d'Orléans (CHR), Hématologie Biologique [CHR d'Orléans], Réanimation Médicale [CHU Henri Mondor - APHP] (DHU A-TVB), Université Paris-Est Créteil, Faculté de Médecine [Créteil] (UPEC-Médecine), Hôpital Henri Mondor, Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Hôpital Henri Mondor-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Institut Mondor de Recherche Biomédicale (IMRB), Institut National de la Santé et de la Recherche Médicale (INSERM)-IFR10-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Centre hospitalier universitaire de Poitiers (CHU Poitiers), Centre d'Investigation Clinique [Rennes] (CIC), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Hôpital Pontchaillou-Institut National de la Santé et de la Recherche Médicale (INSERM), Microenvironment, Cell Differentiation, Immunology and Cancer (MICMAC), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ), CHU Pontchaillou [Rennes], CHU Bordeaux [Bordeaux], Anti-infectieux : supports moléculaires des résistances et innovations thérapeutiques (RESINFIT), CHU Limoges-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Génomique, Environnement, Immunité, Santé, Thérapeutique (GEIST), Septiflux Trial Group : Di Vittorio A, Lachot S, Georget MT, Hanna J, Bretonnière C, Zambon O, Nicolet L, Brule N, Debord C, Le Bris Y, Robillard N, Dargent A, Bretagnol A, Mathonnet A, Boulain T, Barbier F, Benzekri D, Runge I, Kamel T, Cecchini J, Bouyer S, Robert R, Ouattara A., Centre d’Investigation Clinique [Tours] CIC 1415 (CIC ), Centre Hospitalier Régional Universitaire de Tours (CHRU Tours)-Hôpital Bretonneau-Université de Tours (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Régional Universitaire de Tours (CHRU Tours), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), 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)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Marqueurs pronostiques et facteurs de régulations des pathologies cardiaques et vasculaires - UFC ( UR 3920) (PCVP / CARDIO), Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon), Interactions hôte-greffon-tumeur, ingénierie cellulaire et génique - UFC (UMR INSERM 1098) (RIGHT), Institut National de la Santé et de la Recherche Médicale (INSERM)-Etablissement français du sang [Bourgogne-Franche-Comté] (EFS [Bourgogne-Franche-Comté])-Université de Franche-Comté (UFC), Institut National de la Recherche Agronomique (INRA)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université Paris-Sud - Paris 11 (UP11)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut Gustave Roussy (IGR)-Centre Hospitalier Régional Universitaire de Nancy (CHRU Nancy)-Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon)-Université de Bourgogne (UB)-Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon)-Centre Régional de Lutte contre le cancer Georges-François Leclerc [Dijon] (UNICANCER/CRLCC-CGFL), UNICANCER-UNICANCER-Institut National de la Santé et de la Recherche Médicale (INSERM)-Fédération Francophone de la Cancérologie Digestive, FFCD-Université de Montpellier (UM)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Etablissement français du sang [Bourgogne-Franche-Comté] (EFS [Bourgogne-Franche-Comté])-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Centre Hospitalier Régional d'Orléans (CHRO), CHU Henri Mondor-Université Paris-Est Créteil, Faculté de Médecine [Créteil] (UPEC-Médecine), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Henri Mondor-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Institut Génomique, Environnement, Immunité, Santé, Thérapeutique (GEIST), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), 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), Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de la Santé et de la Recherche Médicale (INSERM), Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Etablissement français du sang [Bourgogne-Franche-Comté] (EFS [Bourgogne-Franche-Comté]), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut Gustave Roussy (IGR)-Centre Hospitalier Régional Universitaire de Nancy (CHRU Nancy)-Université de Bourgogne (UB)-Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon)-Centre Régional de Lutte contre le cancer Georges-François Leclerc [Dijon] (UNICANCER/CRLCC-CGFL), UNICANCER-UNICANCER-Institut National de la Santé et de la Recherche Médicale (INSERM)-Fédération Francophone de la Cancérologie Digestive, FFCD-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Etablissement français du sang [Bourgogne-Franche-Comté] (EFS [Bourgogne-Franche-Comté])-Centre National de la Recherche Scientifique (CNRS)-Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université de Montpellier (UM), Université Paris-Est Créteil, Faculté de Médecine [Créteil] (UPEC-Médecine)-CHU Henri Mondor, Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-IFR10, Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES), Degauque, Nicolas, Université de Rennes (UR)-Hôpital Pontchaillou-Institut National de la Santé et de la Recherche Médicale (INSERM), Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ), Centre Hospitalier Régional Universitaire de Tours (CHRU Tours)-Hôpital Bretonneau-Université de Tours-Institut National de la Santé et de la Recherche Médicale (INSERM), Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon), Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Génomique, Environnement, Immunité, Santé, Thérapeutique (GEIST), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-CHU Limoges, Institut National de la Santé et de la Recherche Médicale (INSERM)-Etablissement français du sang [Bourgogne-Franche-Comté] (EFS BFC)-Université de Franche-Comté (UFC), Institut National de la Recherche Agronomique (INRA)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université Paris-Sud - Paris 11 (UP11)-École Pratique des Hautes Études (EPHE), UNICANCER-UNICANCER-Institut National de la Santé et de la Recherche Médicale (INSERM)-Fédération Francophone de la Cancérologie Digestive, FFCD-Université de Montpellier (UM)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Etablissement français du sang [Bourgogne-Franche-Comté] (EFS BFC)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), and CHU Henri Mondor [Créteil]-Université Paris-Est Créteil, Faculté de Médecine [Créteil] (UPEC-Médecine)

Subjects
Pulmonary and Respiratory Medicine, Male, medicine.medical_specialty, [SDV.IMM] Life Sciences [q-bio]/Immunology, Organ Dysfunction Scores, medicine.medical_treatment, Inflammation, 030204 cardiovascular system & hematology, Critical Care and Intensive Care Medicine, Sepsis, sepsis, 03 medical and health sciences, 0302 clinical medicine, Predictive Value of Tests, Internal medicine, medicine, Humans, Prospective Studies, Simplified Acute Physiology Score, Aged, immunosuppression, Clinical Deterioration, Immature Granulocyte, business.industry, Septic shock, flow cytometry, Area under the curve, 030208 emergency & critical care medicine, Immunosuppression, medicine.disease, Survival Analysis, 3. Good health, Systemic inflammatory response syndrome, inflammation, [SDV.IMM]Life Sciences [q-bio]/Immunology, Female, prognosis, medicine.symptom, Cardiology and Cardiovascular Medicine, business
Abstract

International audience; Background In this study, we primarily sought to assess the ability of flow cytometry to predict early clinical deterioration and overall survival in patients with sepsis admitted in the ED and ICU. Methods Patients admitted for community-acquired acute sepsis from 11 hospital centers were eligible. Early (day 7) and late (day 28) deaths were notified. Levels of CD64pos granulocytes, CD16pos monocytes, CD16dim immature granulocytes (IGs), and T and B lymphocytes were assessed by flow cytometry using an identical, cross-validated, robust, and simple consensus standardized protocol in each center. Results Among 1,062 patients screened, 781 patients with confirmed sepsis were studied (age, 67 ± 48 years; Simplified Acute Physiology Score II, 36 ± 17; Sequential Organ Failure Assessment, 5 ± 4). Patients were divided into three groups (sepsis, severe sepsis, and septic shock) on day 0 and on day 2. On day 0, patients with sepsis exhibited increased levels of CD64pos granulocytes, CD16pos monocytes, and IGs with T-cell lymphopenia. Clinical severity was associated with higher percentages of IGs and deeper T-cell lymphopenia. IG percentages tended to be higher in patients whose clinical status worsened on day 2 (35.1 ± 35.6 vs 43.5 ± 35.2, P =.07). Increased IG percentages were also related to occurrence of new organ failures on day 2. Increased IG percentages, especially when associated with T-cell lymphopenia, were independently associated with early (P andlt;.01) and late (P andlt;.01) death. Conclusions Increased circulating IGs at the acute phase of sepsis are linked to clinical worsening, especially when associated with T-cell lymphopenia. Early flow cytometry could help clinicians to target patients at high risk of clinical deterioration. Trial Registry ClinicalTrials.gov; No. NCT01995448; URL www.clinicaltrials.gov © 2018 American College of Chest Physicians

Published
2018

5. Prognostic value of multicenter flow cytometry harmonized assessment of minimal residual disease in acute myeloblastic leukemia

Author

Jean Feuillard, Florent Dumezy, Estelle Guérin, Kaoutar Allou, Marc Maynadié, André Baruchel, Christine Arnoulet, Francis Lacombe, Marie C. Béné, Orianne Wagner Ballon, Hélène Jouault, Groupe d'Etude Immunologique des Leucémies, Françoise Solly, Adrienne Delabarthe, Julien Guy, Lydia Campos, Norbert Ifrah, Pascale Lepelley, Hervé Dombret, Franck Geneviève, Claude Preudhomme, Service d'Hématologie [Bordeaux], CHU Bordeaux [Bordeaux], Hématologie de liaison avec Institut de Cancérologie de la Loire [CHU de Saint-Etienne], CHU Saint-Etienne, Institut Paoli-Calmettes, Fédération nationale des Centres de lutte contre le Cancer (FNCLCC), Service d'hématologie adulte [Hôpital de Saint Louis], CHU Saint Louis [APHP], Service d'Hématologie Cellulaire [Lille], Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Service d'Hématologie biologique [CHU Limoges], CHU Limoges, Centre Hospitalier Universitaire d'Angers (CHU Angers), PRES Université Nantes Angers Le Mans (UNAM), Service d'hématologie biologique (CHU de Dijon), Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon), Service d'Hématologie Biologique [Mondor], Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Hôpital Henri Mondor, Service d'Hématologie Biologique [Hôpital Robert Debré, Paris], AP-HP Hôpital universitaire Robert-Debré [Paris], Hôpital Saint-Louis, Université Paris Diderot - Paris 7 (UPD7)-Assistance publique - Hôpitaux de Paris (AP-HP) (APHP), Laboratoire d'Hématologie Biologique (Hémato - ANGERS), PRES Université Nantes Angers Le Mans (UNAM)-PRES Université Nantes Angers Le Mans (UNAM), Service d'Hématologie [Nantes], Centre hospitalier universitaire de Nantes (CHU Nantes), Hopital Saint-Louis [AP-HP] (AP-HP), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Contrôle de la Réponse Immune B et des Lymphoproliférations (CRIBL), Institut Génomique, Environnement, Immunité, Santé, Thérapeutique (GEIST), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), 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), Registre des hémopathies malignes de Côte d'Or, Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Henri Mondor, Service d'hématologie pédiatrique, Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Université Paris Diderot - Paris 7 (UPD7)-Groupe Hospitalier Saint Louis - Lariboisière - Fernand Widal [Paris], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Service d'hématologie-oncologie adultes, Hematology Department, Université d'Angers (UA), Service d'Hématologie Clinique [Hôtel Dieu, Nantes], Hôtel-Dieu de Nantes, Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Université Paris Diderot - Paris 7 (UPD7), Groupe Hospitalier Saint Louis - Lariboisière - Fernand Widal [Paris], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Université Paris Diderot - Paris 7 (UPD7), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut Génomique, Environnement, Immunité, Santé, Thérapeutique (GEIST), Université de Limoges (UNILIM)-Université de Limoges (UNILIM), Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Hôpital Henri Mondor-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Université Paris Diderot - Paris 7 (UPD7), Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Université Paris Diderot - Paris 7 (UPD7)-Groupe Hospitalier Saint Louis - Lariboisière - Fernand Widal [Paris], and Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)

Subjects
Male, Oncology, Cancer Research, Neoplasm, Residual, CD33, [SDV.BC.BC]Life Sciences [q-bio]/Cellular Biology/Subcellular Processes [q-bio.SC], 0302 clinical medicine, Risk groups, AML, hemic and lymphatic diseases, [SDV.BC.IC]Life Sciences [q-bio]/Cellular Biology/Cell Behavior [q-bio.CB], Prospective Studies, Child, Prospective cohort study, ComputingMilieux_MISCELLANEOUS, Boolean gates, medicine.diagnostic_test, [SDV.MHEP.HEM]Life Sciences [q-bio]/Human health and pathology/Hematology, Hematology, General Medicine, Middle Aged, Prognosis, 3. Good health, Leukemia, Myeloid, Acute, MRD, [SDV.IMM.IA]Life Sciences [q-bio]/Immunology/Adaptive immunology, Child, Preschool, 030220 oncology & carcinogenesis, Female, Good prognosis, Adult, medicine.medical_specialty, Adolescent, Acute myeloblastic leukemia, [SDV.CAN]Life Sciences [q-bio]/Cancer, survival, Disease-Free Survival, Immunophenotyping, Flow cytometry, Young Adult, 03 medical and health sciences, Internal medicine, [SDV.BBM.GTP]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Genomics [q-bio.GN], medicine, Humans, Time point, Aged, business.industry, flow cytometry, Infant, [SDV.BBM.BM]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular biology, medicine.disease, Minimal residual disease, body regions, business, 030215 immunology
Abstract

IF 3.118; International audience; The assessment of minimal residual disease (MRD) in acute myeloblastic leukemia is of growing interest as a prognostic marker of patients' outcome. Multiparameter flow cytometry (MFC), tracking leukemia-associated immunophenotypic patterns, has been shown in several studies to be a useful tool to investigate MRD. Here, we report a multicenter prospective study which allowed to define a harmonized analysis strategy, as well as the efficacy of MFC MRD to predict outcome. This study included 276 patients, in 10 different MFC centers, of whom 268 had at least 1 MRD check point. The combination of a CD45, CD34, and CD33 backbone, with the addition of CD117, CD13, CD7, and CD15 in 2 five-color tubes allowed to define each patient's multiparameter immunophenotypic characteristics at diagnosis, according to a Boolean combination of gates. The same individual diagnosis gating strategy was then applied at each MRD time point for each patient. MRD levels were stratified according to log by log thresholds, from 5 × 10-2 (the classical morphological threshold to define remission) down to

Published
2018

7. The routine leukocyte differential flow cytometry HematoFlow™ method: A new flagging system for automatic validation

Author

Jean-Philippe Vial, Kaoutar Allou, Marie C. Béné, and Francis Lacombe

Subjects
medicine.medical_specialty, Histology, Hematology, medicine.diagnostic_test, business.industry, Flagging, Pattern recognition, Cell Biology, Pathology and Forensic Medicine, Flow cytometry, Blood cell, Immunophenotyping, medicine.anatomical_structure, Blood smear, Internal medicine, White blood cell, Immunology, medicine, Blood disease, Artificial intelligence, business
Abstract

The complete blood cell count and white blood cell differential are the first step in the biological diagnosis of hematological diseases. Both are currently performed by automated instruments which control data and produce alerts. If such flags are activated, the automated differential cannot be validated and the operator must activate a visual blood smear review. Microscopic examination is still today the reference method despite its lack of sensitivity and reproducibility. The HematoFlow™ (Beckman Coulter) system is the first flow cytometry commercialized method designed for the routine differential. Using six markers in five colors and an automated gating strategy, it provides differentials proven to be reliable for 17 leukocyte subpopulations detection. Relying first on a retrospective analysis of 6,462 blood samples processed by HematoFlow™, thresholds were determined to detect the presence of immature granulocytes and/or blast cells. All possible gating strategy misclassifications of leukocyte subpopulations were then summarized in a systematic nomenclature leading to the development of an original flag system based on the detection of aberrant localization of cell events in specific new bivariate histograms. Ultimately, more than 50% of the results could be automatically validated using the HematoFlow™ system, without any false negative, thereby dramatically contributing to an important decrease of technicians' workload. Moreover a noticeable help was given for smear review interpretation and new immunological flags led to the confirmation of blood disease after classical immunophenotyping. These results were confirmed in a second prospective study including 15,335 cases, where more than 50% of the results were automatically validated by this new flag system. MFC stands as being more and more essential for analyzing differentials in routine and this new flag system could greatly improve its implementation.

Published
2015

8. Verification of a quantitative method: complete blood count by flow cytometry, the HematoFlow

Author

Inès, Vergnolle, Kaoutar, Allou, Francis, Lacombe, François Xavier, Mahon, and Jean-Philippe, Vial

Subjects
Automation, Laboratory, Quality Control, Hematologic Tests, Humans, Reproducibility of Results, France, Flow Cytometry, Multiple Myeloma, Hematologic Diseases, Sensitivity and Specificity, Healthy Volunteers, Accreditation, Blood Cell Count
Abstract

The HematoFlow™ system is used in the hematology laboratory of the University Hospital of Bordeaux since July, 2011. The HematoFlow™ solution is the combination of a sample preparator (FP1000) and a 5 color flow cytometer (FC500) linked by a middleware (Remisol™). This system is used in second line when flags are activated by the hematology instrument and/or if the sample comes from the OncoHematology Department. Improvements in hematology disease diagnosis and follow-up were possible using this system. The laboratory has now entered in an accreditation procedure and needs to check this method in compliance with the COFRAC requirements.

Published
2016

9. Harmonemia: a universal strategy for flow cytometry immunophenotyping-A European LeukemiaNet WP10 study

Author

M C Béné, S Couzens, Ulf Johansson, Kaoutar Allou, Wolfgang Kern, Richard Ratei, Thomas Matthes, Matteo G. Della Porta, Anna Porwit, Frank Preijers, Marion G. Macey, C Palacio, David Bloxham, Sanna Siitonen, E Bernal, Artur Paiva, Ricardo Morilla, and Francis Lacombe

Subjects
0301 basic medicine, Oncology, Citometria de Fluxo, Cancer Research, medicine.medical_specialty, Imunofenotipagem, Bioinformatics, Immunophenotyping, Flow cytometry, 03 medical and health sciences, European LeukemiaNet, 0302 clinical medicine, Internal medicine, Humans, Medicine, ddc:616, medicine.diagnostic_test, business.industry, Hematology, Flow Cytometry, Europe, 030104 developmental biology, Hematologic Neoplasms, 030220 oncology & carcinogenesis, business
Abstract

Harmonemia: a universal strategy for flow cytometry immunophenotyping—A European LeukemiaNet WP10 study

Published
2016

10. Synergistic cooperation between ABT-263 and MEK1/2 inhibitor: effect on apoptosis and proliferation of acute myeloid leukemia cells

Author

Valérie Prouzet-Mauléon, Francis Belloc, Arnaud Pigneux, Kaoutar Allou, Pierre Dubus, Francois-Xavier Mahon, Benoit Rousseau, Manon Giraudon, Marie Jeanneteau, and Kelly Airiau

Subjects
0301 basic medicine, MAPK/ERK pathway, Niacinamide, Cell Survival, MAP Kinase Kinase 2, MAP Kinase Kinase 1, Antineoplastic Agents, Apoptosis, HL-60 Cells, Mice, SCID, Biology, acute myeloid leukemia, 03 medical and health sciences, 0302 clinical medicine, Mice, Inbred NOD, hemic and lymphatic diseases, Cell Line, Tumor, Antineoplastic Combined Chemotherapy Protocols, Animals, Humans, BH3 mimetic drugs, Protein Kinase Inhibitors, MEK inhibitors, Cell Proliferation, Mice, Knockout, Sulfonamides, Aniline Compounds, U937 cell, Cell growth, Kinase, Myeloid leukemia, Drug Synergism, U937 Cells, G1 Phase Cell Cycle Checkpoints, Immunohistochemistry, Xenograft Model Antitumor Assays, Tumor Burden, 030104 developmental biology, Oncology, Cell culture, Leukemia, Myeloid, 030220 oncology & carcinogenesis, Immunology, Cancer cell, Acute Disease, Cancer research, Research Paper
Abstract

// Kelly Airiau 1, 2 , Valerie Prouzet-Mauleon 1 , Benoit Rousseau 3 , Arnaud Pigneux 1, 2 , Marie Jeanneteau 2 , Manon Giraudon 2 , Kaoutar Allou 1, 2 , Pierre Dubus 4 , Francis Belloc 1, 2, * , Francois-Xavier Mahon 1, 2, * 1 Laboratoire d’Hematopoiese Leucemique et Cibles Therapeutiques, INSERM 1035, Universite Bordeaux, Bordeaux, France 2 CHU Bordeaux, Hopital Haut-Leveque, Laboratoire d’Hematologie, Pessac, France 3 Animalerie A2, Universite Bordeaux Segalen, Bordeaux, France 4 EA 2406 Histologie et Pathologie, Universite Bordeaux, Bordeaux, France * These authors have contributed equally to this work Correspondence to: Francois-Xavier Mahon, e-mail: francois-xavier.mahon@u-bordeaux.fr Keywords: acute myeloid leukemia, MEK inhibitors, BH3 mimetic drugs Received: June 28, 2015 Accepted: November 16, 2015 Published: November 27, 2015 ABSTRACT In spite of intensive research to improve treatment of acute myeloid leukemia (AML) more than half of all patients continue to develop a refractory disease. Therefore there is need to improve AML treatment. The overexpression of the BCL-2 family anti-apoptotic members, like BCL-2 or BCL-xL has been largely reported in lymphoid tumors but also in AML and other tumors. To counteract the anti-apoptotic effect of BCL-2, BH3 mimetics have been developed to target cancer cells. An increase in activity of ERK1/2 mitogen activated protein (MAP) kinase has also been reported in AML and might be targeted by MEK1/2 inhibitors. Hence, in the current work, we investigated whether the association of a BH3 mimetic such ABT-263 and the MEK1/2 inhibitor pimasertib (MEKI), was efficient to target AML cells. A synergistic increasing of apoptosis was observed in AML cell lines and in primary cells without affecting normal bone marrow cells. Such cooperation was confirmed on tumor growth in a mouse xenograft model of AML. In addition we demonstrated that MEKI sensitized the cells to apoptosis through its ability to promote a G1 cell cycle arrest. So, this combination of a MAP Kinase pathway inhibitor and a BH3 mimetic could be a promising strategy to improve the treatment of AML.

Published
2015

11. The routine leukocyte differential flow cytometry HematoFlow™ method: A new flagging system for automatic validation

Author

Kaoutar, Allou, Jean-Philippe, Vial, Marie C, Béné, and Francis, Lacombe

Subjects
Hematologic Tests, Leukocytes, Humans, Reproducibility of Results, Flow Cytometry, Blood Cell Count, Immunophenotyping, Retrospective Studies
Abstract

The complete blood cell count and white blood cell differential are the first step in the biological diagnosis of hematological diseases. Both are currently performed by automated instruments which control data and produce alerts. If such flags are activated, the automated differential cannot be validated and the operator must activate a visual blood smear review. Microscopic examination is still today the reference method despite its lack of sensitivity and reproducibility. The HematoFlow™ (Beckman Coulter) system is the first flow cytometry commercialized method designed for the routine differential. Using six markers in five colors and an automated gating strategy, it provides differentials proven to be reliable for 17 leukocyte subpopulations detection. Relying first on a retrospective analysis of 6,462 blood samples processed by HematoFlow™, thresholds were determined to detect the presence of immature granulocytes and/or blast cells. All possible gating strategy misclassifications of leukocyte subpopulations were then summarized in a systematic nomenclature leading to the development of an original flag system based on the detection of aberrant localization of cell events in specific new bivariate histograms. Ultimately, more than 50% of the results could be automatically validated using the HematoFlow™ system, without any false negative, thereby dramatically contributing to an important decrease of technicians' workload. Moreover a noticeable help was given for smear review interpretation and new immunological flags led to the confirmation of blood disease after classical immunophenotyping. These results were confirmed in a second prospective study including 15,335 cases, where more than 50% of the results were automatically validated by this new flag system. MFC stands as being more and more essential for analyzing differentials in routine and this new flag system could greatly improve its implementation.

Published
2014

12. Clinical Features And Course Of Refractory Anemia With Ring Sideroblasts Associated With Marked Thrombocytosis

Author

Erica Travaglino, María Ángeles Piñan, Norbert Gattermann, François Girodon, Leonor Arenillas, Kaoutar Allou, François Bailly, Maria Luz Perez Sirvent, María Rozman, Ulrich Germing, Bernardine Favre, Esther Zipperer, Julien Broséus, Mario Cazzola, Carlos Besses, Luca Malcovati, José María Raya, Marc Maynadié, Esther Alonso, Jyoti Evans, Andres Jerez, Torsten Haferlach, Morgane Mounier, Steven Richebourg, Elisa Luño, Eric Lippert, Claudia Haferlach, Jaroslav Cermak, Richard Garand, Sylvie Hermouet, Nuhri Ahwij, Julien Guy, Susanne Schnittger, and Lourdes Florensa

Subjects
Adult, Blood Platelets, Male, medicine.medical_specialty, Adolescent, Anemia, Anèmia, Refractory anemia with ringed sideroblasts, Lower risk, Gastroenterology, Risk Factors, Internal medicine, hemic and lymphatic diseases, medicine, Humans, Myeloproliferative neoplasm, Survival analysis, Aged, Retrospective Studies, Tumors, Aged, 80 and over, Thrombocytosis, Platelet Count, Essential thrombocythemia, business.industry, Anemia, Refractory, Hematology, Janus Kinase 2, Middle Aged, medicine.disease, Survival Analysis, Anemia, Sideroblastic, Surgery, Europe, Refractory anemia with ring sideroblasts, Mutation, Female, Original Articles and Brief Reports, business, Thrombocythemia, Essential
Abstract

Background Refractory anemia with ring sideroblasts associated with marked thrombocytosis was proposed as a provisional entity in the 2001 World Health Organization classification of myeloid neoplasms and also in the 2008 version, but its existence as a single entity is contested. We wish to define the clinical features of this rare myelodysplastic/myeloproliferative neoplasm and to compare its clinical outcome with that of refractory anemia with ring sideroblasts and essential thrombocythemia. Design and Methods We conducted a collaborative retrospective study across Europe. Our database included 200 patients diagnosed with refractory anemia with ring sideroblasts and marked thrombocytosis. For each of these patients, each patient diagnosed with refractory anemia with ring sideroblasts was matched for age and sex. At the same time, a cohort of 454 patients with essential thrombocythemia was used to compare outcomes of the two diseases. Results In patients with refractory anemia with ring sideroblasts and marked thrombocytosis, depending on the Janus Kinase 2 V617F mutational status (positive or negative) or platelet threshold (over or below 600×109/L), no difference in survival was noted. However, these patients had shorter overall survival and leukemia-free survival with a lower risk of thrombotic complications than did patients with essential thrombocythemia ( P

Published
2012

13. Assessment Of Minimal Residual Disease In Acute Myeloblastic Leukemia In Multiparameter Flow Cytometry

Author

Christine Arnoulet, Florent Dumezy, Hervé Dombret, Adrienne de Labarthe, Lydia Campos, Francis Lacombe, Estelle Guérin, André Baruchel, Kaoutar Allou, Julien Guy, Norbert Ifrah, Françoise Solly, Jean Feuillard, Pascale Lepelley, PharmSciD Marie C. Béné, Franck Geneviève, Orianne Wagner Ballon, Marc Maynadié, Claude Preudhomme, and Hélène Jouault

Subjects
Pathology, medicine.medical_specialty, education.field_of_study, Myeloid, business.industry, Immunology, Population, Cell Biology, Hematology, medicine.disease, Biochemistry, Minimal residual disease, Leukemia, medicine.anatomical_structure, Immunophenotyping, medicine, Radiology, Bone marrow, CD5, business, education, Cytometry
Abstract

Acute myeloid leukemias (AML) represent a vast and complex group of diseases where numerous molecular lesions have been and keep being described. From the immunophenotypic point of view, probably because of the variety of cells in the myeloid lineage, a rather large variety also exists. The detection of minimal residual disease (MRD) in such conditions therefore meets the challenge of tracking the proper anomaly and correctly separate leukemic cells from their normal counterparts. In an oligocentric project initiated in France in late 2006, ten cytometry platforms and six molecular biology laboratories collaborated to detect MRD concomitantly in flow and with molecular techniques. The flow cytometry part of this work is reported here. A total of 307 consecutive patients were tested at diagnosis with a comprehensive common panel allowing for the detection of immature markers and potential leukemia-associated immunophenotypic patterns. Follow-up samples were planned to be obtained after induction and at the end of treatment, with an optional control before the second consolidation. In fine, 274 patients had at least one point of follow up. All samples were tested in a technique of whole bone marrow lysis no wash, avoiding any cell loss. The flow cytometry panel comprised ten five-colors tubes, all containing CD45 as gating marker. A newly developed strategy was devised to analyse MRD data. The approach of the GTLLF (Arnoulet, Cytometry part B, 2011) was first applied to properly identify mature polymorphonuclears, monocytes and lymphocytes, allowing for a negative Boolean selection of immature cells in the region dubbed “bermudes” by this group. Focusing on this area, each combination of the four markers tested together with CD45 was then displayed in a total of six biparametric histograms. For each of them, on the diagnosis sample, quadrant gates were constructed so that the lower left one contained no blast cells. A Boolean operation was then designed to exclude all these six areas, thereby combining the positive blasts present in the three other parts of each quadrant. The resulting population was visualized on a CD45/side scatter biparametric histogram to check that the cells appeared as a focused cluster at a precise position. The same strategy was then applied for each patient’s consecutive samples, always checking whether any cells identified with this protocol displayed the scattered pattern of cells engaged in maturation (no MRD) or constituted a focused population without maturation (positive MRD). The amount of MRD was then calculated taking into account as denominator the whole population of nucleated cells in the sample (excluding debris on a live gate). As internal control a specific feature of the Kaluza software was used to merge samples obtained for a given patient in order to display on the same worksheet the diagnosis and follow up samples using the principal component separation provided by the “radar” tool of this software. This original method proved to be easily applicable and provide a consistent help for MRD interpretation. All patients could be assessed for MRD with only two of the ten tubes used. These contained the following combinations : CD15, CD13, CD33, CD34, CD45 and CD7, CD117, CD33, CD34, Cd45. At diagnosis, any combination of expression of CD13, CD33, CD117 and CD34 could be observed, the percentage of positive cases for each of these antigens being respectively 86%, 89%, 81% and 58%. As a whole, 93% of the follow-up samples (MRD) tested contained less than 5% of cells with an immunophenotype comparable to that of diagnosis. This figure was 77% for less than 1% and 43% for less than 0.1%. The strategy devised for files analysis was easily applicable for all patients except those with myelomonocytic leukemia. For some of them, separation of the blasts from the monocytic compartment could be problematic in regenerating bone marrow samples. In conclusion, the flow cytometry part of this multicenter study allowed to establish that the combination of CD45 with CD13, CD33, CD117 and CD34 with the additional information provided by CD5 and CD7 represents a quasi-universal panel, now easy to implement on instruments with 8 or 10 detectors, for the detection of MRD in multiparameter in flow cytometry. Moreover, a powerful strategy of listmodes analysis was developed allowing for the direct comparison of several samples from the same patients and/or of a given sample and normal (control) bone marrow. Disclosures: No relevant conflicts of interest to declare.

Published
2013

14. Outcome of Refractory Anemia with Ringed Sideroblasts Associated with Marked Thrombocytosis (RARS-T) In a Large Cohort of Patients

Author

Girodon, Francois, primary, Broseus, Julien, additional, Florensa, Lourdes, additional, Zipperer, Esther, additional, Schnittger, Susanne, additional, Malcovati, Luca, additional, Richebourg, Steven, additional, Lippert, Eric, additional, Cermak, Jaroslav, additional, Nangalia, Jyoti, additional, Mounier, Morgane, additional, Raya, Jose Maria, additional, Gattermann, Norbert, additional, Haferlach, Torsten, additional, Cazzola, Mario, additional, Garand, Richard, additional, Kaoutar, Allou, additional, Maynadie, Marc, additional, Besses, Carlos, additional, Germing, Ulrich, additional, Haferlach, Claudia, additional, Travaglino, Erica, additional, and Hermouet, Sylvie, additional

Published
2010
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