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https://www.readbyqxmd.com/read/29203377/proposed-terminology-and-classification-of-pre-malignant-neoplastic-conditions-a-consensus-proposal
#1
REVIEW
Peter Valent, Cem Akin, Michel Arock, Christoph Bock, Tracy I George, Stephen J Galli, Jason Gotlib, Torsten Haferlach, Gregor Hoermann, Olivier Hermine, Ulrich Jäger, Lukas Kenner, Hans Kreipe, Ravindra Majeti, Dean D Metcalfe, Alberto Orfao, Andreas Reiter, Wolfgang R Sperr, Philipp B Staber, Karl Sotlar, Charles Schiffer, Giulio Superti-Furga, Hans-Peter Horny
Cancer evolution is a step-wise non-linear process that may start early in life or later in adulthood, and includes pre-malignant (indolent) and malignant phases. Early somatic changes may not be detectable or are found by chance in apparently healthy individuals. The same lesions may be detected in pre-malignant clonal conditions. In some patients, these lesions may never become relevant clinically whereas in others, they act together with additional pro-oncogenic hits and thereby contribute to the formation of an overt malignancy...
November 26, 2017: EBioMedicine
https://www.readbyqxmd.com/read/29165013/efficacy-and-safety-of-native-versus-pegylated-escherichia-coli-asparaginase-for-treatment-of-adults-with-high-risk-philadelphia-chromosome-negative-acute-lymphoblastic-leukemia
#2
Josep-Maria Ribera, Mireia Morgades, Pau Montesinos, Rodrigo Martino, Pere Barba, Beatriz Soria, Arancha Bermúdez, María-José Moreno, José González-Campos, Susana Vives, Cristina Gil, Eugenia Abella, Ramon Guàrdia, Daniel Martínez-Carballeira, Pilar Martínez-Sánchez, María-Luz Amigo, Santiago Mercadal, Alfons Serrano, Aurelio López-Martínez, Ferran Vall-Llovera, María-José Sánchez-Sánchez, María-Jesús Peñarrubia, María Calbacho, Jose-Angel Méndez, Juan Bergua, Antonia Cladera, Mar Tormo, Daniel García-Belmonte, Evarist Feliu, Juana Ciudad, Alberto Orfao
Native or pegylated (PEG) asparaginase (ASP) are commonly used in treatment of acute lymphoblastic leukemia (ALL), but have been scarcely compared in the same trial in adult patients. Native vs. PEG-ASP administered according to availability in each center were prospectively evaluated in adults with high-risk ALL. Ninety-one patients received native ASP and 35 PEG-ASP in induction. No significant differences were observed in complete remission, minimal residual disease levels after induction and after consolidation, disease-free survival, and overall survival...
November 22, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/29154914/how-to-make-usage-of-the-standardized-euroflow-8-color-protocols-possible-for-instruments-of-different-manufacturers
#3
Michaela Nováková, Hana Glier, Naděžda Brdičková, Marcela Vlková, Ana Helena Santos, Margarida Lima, Mikael Roussel, Juan Flores-Montero, Tomasz Szczepanski, Sebastian Böttcher, Vincent H J van der Velden, Paula Fernandez, Ester Mejstříková, Leire Burgos, Bruno Paiva, Jacques J M van Dongen, Alberto Orfao, Tomáš Kalina
A critical component of the EuroFlow standardization of leukemia/lymphoma immunophenotyping is instrument setup. Initially, the EuroFlow consortium developed a step-by-step standard operating protocol for instrument setup of ≥8-color flow cytometers that were available in 2006, when the EuroFlow activities started. Currently, there are 14 instruments from 9 manufacturers capable of 3-laser excitation and ≥8 color measurements. The specific adaptations required in the instrument set-up to enable them to acquire the standardized 8-color EuroFlow protocols are described here...
November 15, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/29116516/screening-phage-display-antibody-libraries-using-protein-arrays
#4
Ricardo Jara-Acevedo, Paula Díez, María González-González, Rosa María Dégano, Nieves Ibarrola, Rafael Góngora, Alberto Orfao, Manuel Fuentes
Phage-display technology constitutes a powerful tool for the generation of specific antibodies against a predefined antigen. The main advantages of phage-display technology in comparison to conventional hybridoma-based techniques are: (1) rapid generation time and (2) antibody selection against an unlimited number of molecules (biological or not). However, the main bottleneck with phage-display technology is the validation strategies employed to confirm the greatest number of antibody fragments. The development of new high-throughput (HT) techniques has helped overcome this great limitation...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29099494/prognostic-value-of-antigen-expression-in-multiple-myeloma-a-pethema-gem-study-on-1-265-patients-enrolled-in-four-consecutive-clinical-trials
#5
P Arana, B Paiva, M-T Cedena, N Puig, L Cordon, M-B Vidriales, N C Gutierrez, F Chiodi, L Burgos, L-L Anglada, J Martinez-Lopez, M-T Hernandez, A-I Teruel, M Gironella, M-A Echeveste, L Rosiñol, R Martinez, A Oriol, J De la Rubia, A Orfao, J Blade, J-J Lahuerta, M-V Mateos, J F S Miguel
Persistence of minimal residual disease (MRD) after treatment for myeloma predicts inferior outcomes, but within MRD-positive patients there is great heterogeneity with both early and very late relapses. Amongst different MRD techniques, flow cytometry provides additional information about antigen expression on tumor cells, which could potentially contribute to stratify MRD-positive patients. We investigated the prognostic value of those antigens required to monitor MRD in 1265 newly-diagnosed patients enrolled in the GEM2000, GEM2005MENOS65, GEM2005MAS65 and GEM2010MAS65 protocols...
November 3, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/29089646/automated-database-guided-expert-supervised-orientation-for-immunophenotypic-diagnosis-and-classification-of-acute-leukemia
#6
L Lhermitte, E Mejstrikova, A J van der Sluijs-Gelling, G E Grigore, L Sedek, A E Bras, G Gaipa, E S da Costa, M Novakova, E Sonneveld, C Buracchi, T de Sá Bacelar, J G Te Marvelde, A Trinquand, V Asnafi, T Szczepanski, S Matarraz, A Lopez, B Vidriales, J Bulsa, O Hrusak, T Kalina, Q Lecrevisse, M M Ayuso, M Brüggemann, J Verde, P Fernandez, L Burgos, B Paiva, C E Pedreira, J J M van Dongen, A Orfao, V H J van der Velden
Precise classification of acute leukemia (AL) is crucial for adequate treatment. EuroFlow has previously designed an AL orientation tube (ALOT) to guide towards the relevant classification panel (T-cell acute lymphoblastic leukemia (T-ALL), B-cell precursor (BCP)-ALL, and/or acute myeloid leukemia (AML)) and final diagnosis. Now we built a reference database with 656 typical AL samples (145 T-ALL, 377 BCP-ALL, 134 AML), processed and analyzed via standardized protocols. Using principal component analysis (PCA)-based plots and automated classification algorithms for direct comparison of single-cells from individual patients against the database, another 783 cases were subsequently evaluated...
November 1, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/29082857/embryonic-development-and-larval-growth-of-brycon-nattereri-g%C3%A3-nther-1864-characidae-and-its-implications-for-captive-rearing
#7
Alexandre N Maria, Alexandre Ninhaus-Silveira, Laura H Orfão, Ana T M Viveiros
The aim of this study was to describe, for the first time, the embryogenesis and larval growth of the Paraitinga Brycon nattereri Günther, 1864 reared in captivity. After artificial fertilization, eggs were incubated at constant temperature (~19°C) and collected every 15 min during the first 3 h and then every 3 h until hatching. Five larvae were collected daily over 15 days for evaluation of the length, yolk sac volume and specific growth rate. The following stages of embryonic development were identified: zygote, cleavage, gastrula, segmentation and larval...
October 30, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28978170/imatinib-in-systemic-mastocytosis-a-phase-iv-clinical-trial-in-patients-lacking-exon-17-kit-mutations-and-review-of-the-literature
#8
Iván Alvarez-Twose, Almudena Matito, José Mário Morgado, Laura Sánchez-Muñoz, María Jara-Acevedo, Andrés García-Montero, Andrea Mayado, Carolina Caldas, Cristina Teodósio, Javier Ignacio Muñoz-González, Manuela Mollejo, Luis Escribano, Alberto Orfao
Resistance to imatinib has been recurrently reported in systemic mastocytosis (SM) carrying exon 17 KIT mutations. We evaluated the efficacy and safety of imatinib therapy in 10 adult SM patients lacking exon 17 KIT mutations, 9 of which fulfilled criteria for well-differentiated SM (WDSM). The World Health Organization 2008 disease categories among WDSM patients were mast cell (MC) leukemia (n = 3), indolent SM (n = 3) and cutaneous mastocytosis (n = 3); the remainder case had SM associated with a clonal haematological non-MC disease...
September 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28965920/selection-and-validation-of-antibody-clones-against-igg-and-iga-subclasses-in-switched-memory-b-cells-and-plasma-cells
#9
Elena Blanco, Martin Perez-Andres, Luzalba Sanoja-Flores, Marjolein Wentink, Ondrej Pelak, Marta Martín-Ayuso, Georgiana Grigore, Juan Torres-Canizales, Eduardo López-Granados, Tomas Kalina, Mirjam van der Burg, Sonia Arriba-Méndez, Santiago Santa Cruz, Noemí Puig, Jacques J M van Dongen, Alberto Orfao
The clinical value of assessing immunoglobulin (Ig)G and IgA subclasses in addition to the isotypes of soluble Igs in serum has been well established. >20years ago, the International Union of Immunological Societies and the World Health Organization performed collaborative studies in order to validate antibody (Ab) clones for the detection of IgG and IgA subclasses for a broad range of laboratory assays, except for flow cytometry. Here we analyzed the performance of commercially available Ab clones to detect IgG and IgA subclasses in memory B-cells and plasma cells (PCs) by flow cytometry...
September 28, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28844608/risk-factors-for-the-occurrence-of-epistaxis-prospective-study
#10
Filipa Camacho Côrte, Tiago Orfao, Cláudia Camila Dias, Carla Pinto Moura, Margarida Santos
OBJECTIVE: Analyse and compare the characteristics of patients with epistaxis admitted to the otolaryngology emergency department with those provided by a control group. Establish a model to identify epistaxis predictive factors. METHODS: Prospective analysis of 283 consecutive adults, admitted to the otolaryngology emergency department of a tertiary referral centre between 25 January and 25 February 2014. Comparison of gender, age, co-morbidities, usual medication, history of epistaxis or nasal trauma, presence of septal deviation and blood pressure value on admission, between the elements that were admitted to the emergency due to epistaxis (group 1) and a group composed of patients with other symptoms (group 2)...
August 22, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28838291/zero-valent-iron-supported-on-nitrogen-doped-carbon-xerogel-as-catalysts-for-the-oxidation-of-phenol-by-fenton-like-system
#11
S A Messele, O S G P Soares, J J M Órfão, C Bengoa, J Font
Nitrogen-free and nitrogen-doped carbon xerogel materials, from urea and melamine precursors, were prepared at different pH and evaluated as adsorbents/catalysts in the removal of phenol. Then ZVI was supported on these carbon xerogel materials and its activity was again evaluated for phenol removal by adsorption and catalytic wet peroxide oxidation (CWPO). The prepared samples were characterized by N2 adsorption at -196 °C, pH at the point of zero charge (pHPZC) and elemental analysis. The textural properties of the N-free and N-doped carbon xerogels are strongly influenced by the pH of the preparation solution and precursor used...
August 25, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28712848/a-short-region-of-connexin43-reduces-human-glioma-stem-cell-migration-invasion-and-survival-through-src-pten-and-fak
#12
Myriam Jaraíz-Rodríguez, Ma Dolores Tabernero, María González-Tablas, Alvaro Otero, Alberto Orfao, Jose M Medina, Arantxa Tabernero
Connexin43 (CX43), a protein that forms gap junction channels and hemichannels in astrocytes, is downregulated in high-grade gliomas. Its relevance for glioma therapy has been thoroughly explored; however, its positive effects on proliferation are counterbalanced by its effects on migration and invasion. Here, we show that a cell-penetrating peptide based on CX43 (TAT-Cx43266-283) inhibited c-Src and focal adhesion kinase (FAK) and upregulated phosphatase and tensin homolog in glioma stem cells (GSCs) derived from patients...
August 8, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28614516/coordinated-care-for-tuberculosis-data-registration-and-implementation-of-a-computerized-system
#13
Nathalia Halax Orfão, Nathalia Yukie Crepaldi, Maria Eugênia Firmino Brunello, Rubia Laine de Paula Andrade, Aline Aparecida Monroe, Antonio Ruffino-Netto, Tereza Cristina Scatena Villa
Objective: to analyze sources of data for tuberculosis (TB) before and after the implementation of the Computerized System to Record Care for TB in Ribeirão Preto - SP. Method: Intervention, descriptive-analytical epidemiological study. Data was collected from secondary sources using a structured form, and analyzed using Chi-squared or Fisher's Exact Test, with a significance level of 5%. Results: We found an association between the period before implementation of the system and placing the Directly Observed Treatment Card in the file, and registration of instructions for the return visit by the nursing team...
June 2017: Ciência & Saúde Coletiva
https://www.readbyqxmd.com/read/28597680/fishbone-impaction-in-the-colon
#14
Armando Peixoto, Marco Silva, Branca Órfão, Guilherme Macedo
Postoperative benign biliary stricture in the anastomotic site is one of the most common complications of biliary-enteric anastomosis, with a rate of 6.87% after 2-13 years of follow-up. If untreated, biliary strictures can induce other complications such as recurrent cholangitis, intrahepatic stones, pancreatitis and secondary biliary cirrhosis. We report our experience with extracorporeal shock wave lithotripsy (ESWL) in a patient with a massive symptomatic stone proximal to an anastomotic biliary stricture...
June 2017: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/28498784/depth-of-response-in-multiple-myeloma-a-pooled-analysis-of-three-pethema-gem-clinical-trials
#15
Juan-Jose Lahuerta, Bruno Paiva, Maria-Belen Vidriales, Lourdes Cordón, Maria-Teresa Cedena, Noemi Puig, Joaquin Martinez-Lopez, Laura Rosiñol, Norma C Gutierrez, María-Luisa Martín-Ramos, Albert Oriol, Ana-Isabel Teruel, María-Asunción Echeveste, Raquel de Paz, Felipe de Arriba, Miguel T Hernandez, Luis Palomera, Rafael Martinez, Alejandro Martin, Adrian Alegre, Javier De la Rubia, Alberto Orfao, María-Victoria Mateos, Joan Blade, Jesus F San-Miguel
Purpose To perform a critical analysis on the impact of depth of response in newly diagnosed multiple myeloma (MM). Patients and Methods Data were analyzed from 609 patients who were enrolled in the GEM (Grupo Español de Mieloma) 2000 and GEM2005MENOS65 studies for transplant-eligible MM and the GEM2010MAS65 clinical trial for elderly patients with MM who had minimal residual disease (MRD) assessments 9 months after study enrollment. Median follow-up of the series was 71 months. Results Achievement of complete remission (CR) in the absence of MRD negativity was not associated with prolonged progression-free survival (PFS) and overall survival (OS) compared with near-CR or partial response (median PFS, 27, 27, and 29 months, respectively; median OS, 59, 64, and 65 months, respectively)...
September 1, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28467808/a-systematic-approach-for-peptide-characterization-of-b-cell-receptor-in-chronic-lymphocytic-leukemia-cells
#16
Paula Díez, Nieves Ibarrola, Rosa M Dégano, Quentin Lécrevisse, Arancha Rodriguez-Caballero, Ignacio Criado, Wendy G Nieto, Rafael Góngora, Marcos González, Julia Almeida, Alberto Orfao, Manuel Fuentes
A wide variety of immunoglobulins (Ig) is produced by the immune system thanks to different mechanisms (V(D)J recombination, somatic hypermutation, and antigen selection). The profiling of Ig sequences (at both DNA and peptide levels) are of great relevance to developing targeted vaccines or treatments for specific diseases or infections. Thus, genomics and proteomics techniques (such as Next-Generation Sequencing (NGS) and mass spectrometry (MS)) have notably increased the knowledge in Ig sequencing and serum Ig peptide profiling in a high-throughput manner...
June 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28419441/detailed-immunophenotyping-of-b-cell-precursors-in-regenerating-bone-marrow-of-acute-lymphoblastic-leukaemia-patients-implications-for-minimal-residual-disease-detection
#17
Prisca M J Theunissen, Lukasz Sedek, Valerie De Haas, Tomasz Szczepanski, Alita Van Der Sluijs, Ester Mejstrikova, Michaela Nováková, Tomas Kalina, Quentin Lecrevisse, Alberto Orfao, Arjan C Lankester, Jacques J M van Dongen, Vincent H J Van Der Velden
Flow cytometric detection of minimal residual disease (MRD) in children with B-cell precursor acute lymphoblastic leukaemia (BCP-ALL) requires immunophenotypic discrimination between residual leukaemic cells and B-cell precursors (BCPs) which regenerate during therapy intervals. In this study, EuroFlow-based 8-colour flow cytometry and innovative analysis tools were used to first characterize the immunophenotypic maturation of normal BCPs in bone marrow (BM) from healthy children, resulting in a continuous multiparametric pathway including transition stages...
July 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28385786/host-virus-and-pneumococcus-specific-immune-responses-in-high-count-monoclonal-b-cell-lymphocytosis-and-chronic-lymphocytic-leukemia-implications-for-disease-progression
#18
Ignacio Criado, Santiago Muñoz-Criado, Arancha Rodríguez-Caballero, Wendy G Nieto, Alfonso Romero, Paulino Fernández-Navarro, Miguel Alcoceba, Teresa Contreras, Marcos González, Alberto Orfao, Julia Almeida
Patients diagnosed with chronic lymphocytic leukemia (CLL) display a high incidence of infections due to an associated immunodeficiency that includes hypogammaglobulinemia. A higher risk of infections has also been recently reported for high-count monoclonal B-cell lymphocytosis, while no information is available in low-count monoclonal B-cell lymphocytosis. Here, we evaluated the status of the humoral immune system in patients with chronic lymphocytic leukemia (n=58), as well as in low- (n=71) and high- (n=29) count monoclonal B-cell lymphocytosis versus healthy donors (n=91)...
July 2017: Haematologica
https://www.readbyqxmd.com/read/28365329/lot-to-lot-stability-of-antibody-reagents-for-flow-cytometry
#19
Sebastian Böttcher, Vincent H J van der Velden, Neus Villamor, Matthias Ritgen, Juan Flores-Montero, Hugo Murua Escobar, Tomas Kalina, Monika Brüggemann, Georgiana Grigore, Marta Martin-Ayuso, Quentin Lecrevisse, Carlos E Pedreira, Jacques J M van Dongen, Alberto Orfao
The fluorescence detected using fluorochrome-labelled monoclonal antibodies depends not only on the abundance of the target antigen, but amongst many other factors also on the effective fluorochrome-to-antibody ratio. The diagnostic approach of the EuroFlow consortium relies on reproducible fluorescence intensities over time. A capture bead system for mouse immunoglobulin light chains was utilized to compare the mean fluorescence intensity of 1323 consecutive antibody lots to the currently used lot of the same monoclonal antibody...
March 30, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28341440/optimization-and-testing-of-dried-antibody-tube-the-euroflow-lst-and-pidot-tubes-as-examples
#20
V H J van der Velden, J Flores-Montero, Martin Perez, Marta Martin-Ayuso, Oliver Crespo, Elena Blanco, Tomas Kalina, Jan Philippé, Carolien Bonroy, Maaike de Bie, Jeroen Te Marvelde, Cristina Teodosio, Alba Corral Mateos, Veronika Kanderová, Mirjam van der Burg, Dennis Van Hoof, Jacques J M van Dongen, Alberto Orfao
Within EuroFlow, we recently developed screening tubes for hematological malignancies and immune deficiencies. Pipetting of antibodies for such 8-color 12-marker tubes however is time-consuming and prone to operational mistakes. We therefore evaluated dried formats of the lymphocytosis screening tube (LST) and of the primary immune deficiency orientation tube (PIDOT). Both tubes were evaluated on normal and/or on patient samples, comparing the mean fluorescence intensity of specific lymphocyte populations. Our data show that the dried tubes and liquid counterparts give highly comparable staining results, particularly when analyzed in multidimensional plots...
March 21, 2017: Journal of Immunological Methods
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